test(skill): migrate skill tests to effect fixtures (#29046)

packages/core/src/effect/service-use.ts

@@ -15,6 +15,7 @@ type ServiceUse<Identifier, Shape> = {
 }
 
 export const serviceUse = <Identifier, Shape>(tag: Context.Service<Identifier, Shape>) => {
+  const cache = new Map<string, (...args: unknown[]) => Effect.Effect<unknown, unknown, unknown>>()
   // This is the only dynamic boundary: TypeScript knows the accessor shape,
   // but Proxy property names are runtime values.
   const access = new Proxy(
@@ -22,7 +23,9 @@ export const serviceUse = <Identifier, Shape>(tag: Context.Service<Identifier, S
     {
       get: (_, key) => {
         if (typeof key !== "string") return undefined
-        return (...args: unknown[]) =>
+        const cached = cache.get(key)
+        if (cached) return cached
+        const accessor = (...args: unknown[]) =>
           tag.use((service) => {
             // oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion -- Proxy keys are checked at runtime.
             const method = service[key as keyof Shape]
@@ -30,6 +33,8 @@ export const serviceUse = <Identifier, Shape>(tag: Context.Service<Identifier, S
             // oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion -- ServiceUse exposes only Effect-returning methods.
             return (method as (...args: unknown[]) => Effect.Effect<unknown, unknown, unknown>)(...args)
           })
+        cache.set(key, accessor)
+        return accessor
       },
     },
   )

packages/core/src/filesystem.ts

@@ -3,9 +3,10 @@ import { dirname, join, relative, resolve as pathResolve } from "path"
 import { realpathSync } from "fs"
 import * as NFS from "fs/promises"
 import { lookup } from "mime-types"
-import { Effect, FileSystem, Layer, Schema, Context } from "effect"
+import { Context, Effect, FileSystem, Layer, Schema } from "effect"
 import type { PlatformError } from "effect/PlatformError"
 import { Glob } from "./util/glob"
+import { serviceUse } from "./effect/service-use"
 
 export namespace AppFileSystem {
   export class FileSystemError extends Schema.TaggedErrorClass<FileSystemError>()("FileSystemError", {
@@ -39,6 +40,8 @@ export namespace AppFileSystem {
 
   export class Service extends Context.Service<Service, Interface>()("@opencode/FileSystem") {}
 
+  export const use = serviceUse(Service)
+
   export const layer = Layer.effect(
     Service,
     Effect.gen(function* () {

packages/llm/src/protocols/anthropic-messages.ts

@@ -20,7 +20,6 @@ import {
 import { JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared"
 import * as Cache from "./utils/cache"
 import { Lifecycle } from "./utils/lifecycle"
-import { ProviderOptions } from "./utils/provider-options"
 import { ToolStream } from "./utils/tool-stream"
 
 const ADAPTER = "anthropic-messages"
@@ -137,7 +136,6 @@ const AnthropicTool = Schema.Struct({
   description: Schema.String,
   input_schema: JsonObject,
   cache_control: Schema.optional(AnthropicCacheControl),
-  eager_input_streaming: Schema.optional(Schema.Boolean),
 })
 type AnthropicTool = Schema.Schema.Type<typeof AnthropicTool>
 
@@ -146,10 +144,10 @@ const AnthropicToolChoice = Schema.Union([
   Schema.Struct({ type: Schema.tag("tool"), name: Schema.String }),
 ])
 
-// Anthropic accepts several `thinking` shapes (enabled with `budget_tokens`,
+const AnthropicThinking = Schema.Struct({
-// adaptive with optional `display`, and disabled). The body schema permits the
+  type: Schema.tag("enabled"),
-// full union so explicit lowering can pick the correct fields per model.
+  budget_tokens: Schema.Number,
-const AnthropicThinkingBody = Schema.Record(Schema.String, Schema.Unknown)
+})
 
 const AnthropicBodyFields = {
   model: Schema.String,
@@ -163,12 +161,9 @@ const AnthropicBodyFields = {
   top_p: Schema.optional(Schema.Number),
   top_k: Schema.optional(Schema.Number),
   stop_sequences: optionalArray(Schema.String),
-  thinking: Schema.optional(AnthropicThinkingBody),
+  thinking: Schema.optional(AnthropicThinking),
 }
-// Unknown provider options pass through verbatim with top-level keys snake-cased.
+const AnthropicMessagesBody = Schema.Struct(AnthropicBodyFields)
-const AnthropicMessagesBody = Schema.StructWithRest(Schema.Struct(AnthropicBodyFields), [
-  Schema.Record(Schema.String, Schema.Any),
-])
 export type AnthropicMessagesBody = Schema.Schema.Type<typeof AnthropicMessagesBody>
 
 const AnthropicUsage = Schema.Struct({
@@ -259,16 +254,11 @@ const signatureFromMetadata = (metadata: ProviderMetadata | undefined): string |
   return typeof anthropic.signature === "string" ? anthropic.signature : undefined
 }
 
-const lowerTool = (
+const lowerTool = (breakpoints: Cache.Breakpoints, tool: ToolDefinition): AnthropicTool => ({
-  breakpoints: Cache.Breakpoints,
-  tool: ToolDefinition,
-  eagerInputStreaming: boolean | undefined,
-): AnthropicTool => ({
   name: tool.name,
   description: tool.description,
   input_schema: tool.inputSchema,
   cache_control: cacheControl(breakpoints, tool.cache),
-  eager_input_streaming: eagerInputStreaming ? true : undefined,
 })
 
 const lowerToolChoice = (toolChoice: NonNullable<LLMRequest["toolChoice"]>) =>
@@ -423,46 +413,24 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
   return messages
 })
 
-// Typed AI SDK Anthropic options. Mirrors the subset of
+const anthropicOptions = (request: LLMRequest) => request.providerOptions?.anthropic
-// `anthropicLanguageModelOptions` that opencode's provider transform actually
-// emits today (see `packages/opencode/src/provider/transform.ts`). Unknown
-// keys flow through the index signature and pass through to the wire body
-// with their top-level key snake-cased.
-type AnthropicEffort = "low" | "medium" | "high" | "xhigh" | "max"
-type AnthropicThinking =
-  | { readonly type: "enabled"; readonly budgetTokens?: number; readonly budget_tokens?: number }
-  | { readonly type: "adaptive"; readonly display?: "omitted" | "summarized" }
-  | { readonly type: "disabled" }
 
-interface AnthropicOptions {
+const lowerThinking = Effect.fn("AnthropicMessages.lowerThinking")(function* (request: LLMRequest) {
-  readonly thinking?: AnthropicThinking
+  const thinking = anthropicOptions(request)?.thinking
-  readonly effort?: AnthropicEffort
+  if (!ProviderShared.isRecord(thinking) || thinking.type !== "enabled") return undefined
-  readonly toolStreaming?: boolean
+  const budget =
-  readonly [extra: string]: unknown
+    typeof thinking.budgetTokens === "number"
-}
+      ? thinking.budgetTokens
-
+      : typeof thinking.budget_tokens === "number"
-const ANTHROPIC_KNOWN_KEYS: ReadonlySet<string> = new Set(["thinking", "effort", "toolStreaming"])
+        ? thinking.budget_tokens
-
+        : undefined
-const lowerThinking = (thinking: AnthropicOptions["thinking"]) => {
+  if (budget === undefined) return yield* invalid("Anthropic thinking provider option requires budgetTokens")
-  if (thinking === undefined) return undefined
-  if (thinking.type === "disabled") return undefined
-  if (thinking.type === "adaptive") {
-    return { type: "adaptive" as const, ...(thinking.display ? { display: thinking.display } : {}) }
-  }
-  const budget = thinking.budgetTokens ?? thinking.budget_tokens
-  if (budget === undefined) return undefined
   return { type: "enabled" as const, budget_tokens: budget }
-}
+})
 
 const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (request: LLMRequest) {
   const toolChoice = request.toolChoice ? yield* lowerToolChoice(request.toolChoice) : undefined
   const generation = request.generation
-  const options = ProviderOptions.merge(request, ["anthropic"]) as AnthropicOptions
-  // AI SDK's `toolStreaming` controls per-tool `eager_input_streaming`. opencode
-  // sets `toolStreaming: false` for non-Claude models routed through
-  // `@ai-sdk/anthropic`; otherwise the field is left unset so the provider
-  // applies its own default.
-  const eagerInputStreaming = options.toolStreaming === true
   // Allocate the 4-breakpoint budget in invalidation order: tools → system →
   // messages. Tools live highest in the cache hierarchy, so when callers
   // over-mark we keep their tool hints and shed the message-tail ones first.
@@ -470,7 +438,7 @@ const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (reques
   const tools =
     request.tools.length === 0 || request.toolChoice?.type === "none"
       ? undefined
-      : request.tools.map((tool) => lowerTool(breakpoints, tool, eagerInputStreaming))
+      : request.tools.map((tool) => lowerTool(breakpoints, tool))
   const system =
     request.system.length === 0
       ? undefined
@@ -486,7 +454,6 @@ const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (reques
     )
   }
   return {
-    ...ProviderOptions.passthrough(options, ANTHROPIC_KNOWN_KEYS),
     model: request.model.id,
     system,
     messages,
@@ -498,8 +465,7 @@ const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (reques
     top_p: generation?.topP,
     top_k: generation?.topK,
     stop_sequences: generation?.stop,
-    thinking: lowerThinking(options.thinking),
+    thinking: yield* lowerThinking(request),
-    ...(options.effort !== undefined ? { effort: options.effort } : {}),
   }
 })
 

packages/llm/src/protocols/openai-chat.ts

@@ -15,7 +15,6 @@ import {
 } from "../schema"
 import { isRecord, JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared"
 import { OpenAIOptions } from "./utils/openai-options"
-import { ProviderOptions } from "./utils/provider-options"
 import { Lifecycle } from "./utils/lifecycle"
 import { ToolStream } from "./utils/tool-stream"
 
@@ -51,10 +50,6 @@ const OpenAIChatAssistantToolCall = Schema.Struct({
 })
 type OpenAIChatAssistantToolCall = Schema.Schema.Type<typeof OpenAIChatAssistantToolCall>
 
-// `reasoning_content` is a plain string per DeepSeek/OpenAI-compatible spec.
-// `reasoning_details` is an OpenRouter-style array of typed reasoning objects
-// (summary / encrypted / text). We accept the structured payload as-is so it
-// round-trips verbatim to the provider on continuation requests.
 const OpenAIChatMessage = Schema.Union([
   Schema.Struct({ role: Schema.Literal("system"), content: Schema.String }),
   Schema.Struct({ role: Schema.Literal("user"), content: Schema.String }),
@@ -63,7 +58,6 @@ const OpenAIChatMessage = Schema.Union([
     content: Schema.NullOr(Schema.String),
     tool_calls: optionalArray(OpenAIChatAssistantToolCall),
     reasoning_content: Schema.optional(Schema.String),
-    reasoning_details: Schema.optional(Schema.Array(Schema.Record(Schema.String, Schema.Unknown))),
   }),
   Schema.Struct({ role: Schema.Literal("tool"), tool_call_id: Schema.String, content: Schema.String }),
 ]).pipe(Schema.toTaggedUnion("role"))
@@ -85,7 +79,7 @@ export const bodyFields = {
   stream: Schema.Literal(true),
   stream_options: Schema.optional(Schema.Struct({ include_usage: Schema.Boolean })),
   store: Schema.optional(Schema.Boolean),
-  reasoning_effort: Schema.optional(Schema.String),
+  reasoning_effort: Schema.optional(OpenAIOptions.OpenAIReasoningEffort),
   max_tokens: Schema.optional(Schema.Number),
   temperature: Schema.optional(Schema.Number),
   top_p: Schema.optional(Schema.Number),
@@ -94,7 +88,7 @@ export const bodyFields = {
   seed: Schema.optional(Schema.Number),
   stop: optionalArray(Schema.String),
 }
-const OpenAIChatBody = Schema.StructWithRest(Schema.Struct(bodyFields), [Schema.Record(Schema.String, Schema.Any)])
+const OpenAIChatBody = Schema.Struct(bodyFields)
 export type OpenAIChatBody = Schema.Schema.Type<typeof OpenAIChatBody>
 
 // =============================================================================
@@ -131,16 +125,9 @@ const OpenAIChatToolCallDelta = Schema.Struct({
 })
 type OpenAIChatToolCallDelta = Schema.Schema.Type<typeof OpenAIChatToolCallDelta>
 
-// Streaming reasoning fields. `reasoning_content` (DeepSeek) and `reasoning`
-// (AI SDK fallback) are strings; `reasoning_details` (OpenRouter) is an array
-// of typed reasoning detail objects. We surface their plaintext via reasoning
-// deltas and preserve the structured array for downstream round-trip.
-const OpenAIChatReasoningDetail = Schema.Record(Schema.String, Schema.Unknown)
 const OpenAIChatDelta = Schema.Struct({
   content: optionalNull(Schema.String),
   reasoning_content: optionalNull(Schema.String),
-  reasoning: optionalNull(Schema.String),
-  reasoning_details: optionalNull(Schema.Array(OpenAIChatReasoningDetail)),
   tool_calls: optionalNull(Schema.Array(OpenAIChatToolCallDelta)),
 })
 
@@ -201,16 +188,6 @@ const lowerToolCall = (part: ToolCallPart): OpenAIChatAssistantToolCall => ({
 const openAICompatibleReasoningContent = (native: unknown) =>
   isRecord(native) && typeof native.reasoning_content === "string" ? native.reasoning_content : undefined
 
-// `reasoning_details` rounds-trips the OpenRouter structured array. Accept the
-// array shape as canonical; tolerate a string for legacy callers that already
-// flattened it.
-const openAICompatibleReasoningDetails = (native: unknown) => {
-  if (!isRecord(native)) return undefined
-  const value = native.reasoning_details
-  if (Array.isArray(value)) return value as ReadonlyArray<Record<string, unknown>>
-  return undefined
-}
-
 const lowerUserMessage = Effect.fn("OpenAIChat.lowerUserMessage")(function* (message: OpenAIChatRequestMessage) {
   const content: TextPart[] = []
   for (const part of message.content) {
@@ -243,7 +220,6 @@ const lowerAssistantMessage = Effect.fn("OpenAIChat.lowerAssistantMessage")(func
     content: content.length === 0 ? null : ProviderShared.joinText(content),
     tool_calls: toolCalls.length === 0 ? undefined : toolCalls,
     reasoning_content: openAICompatibleReasoningContent(message.native?.openaiCompatible),
-    reasoning_details: openAICompatibleReasoningDetails(message.native?.openaiCompatible),
   }
 })
 
@@ -270,14 +246,13 @@ const lowerMessages = Effect.fn("OpenAIChat.lowerMessages")(function* (request:
 })
 
 const lowerOptions = Effect.fn("OpenAIChat.lowerOptions")(function* (request: LLMRequest) {
-  const options = OpenAIOptions.options(request)
+  const store = OpenAIOptions.store(request)
-  const effort = options.reasoningEffort
+  const reasoningEffort = OpenAIOptions.reasoningEffort(request)
-  if (effort !== undefined && !OpenAIOptions.isReasoningEffort(effort))
+  if (reasoningEffort && !OpenAIOptions.isReasoningEffort(reasoningEffort))
-    return yield* invalid(`OpenAI Chat does not support reasoning effort ${effort}`)
+    return yield* invalid(`OpenAI Chat does not support reasoning effort ${reasoningEffort}`)
   return {
-    ...ProviderOptions.passthrough(options, OpenAIOptions.KNOWN_KEYS),
+    ...(store !== undefined ? { store } : {}),
-    ...(options.store !== undefined ? { store: options.store } : {}),
+    ...(reasoningEffort ? { reasoning_effort: reasoningEffort } : {}),
-    ...(effort !== undefined ? { reasoning_effort: effort } : {}),
   }
 })
 
@@ -350,15 +325,8 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
 
     let lifecycle = state.lifecycle
 
-    // OpenRouter-style `reasoning_details` ships an array of typed reasoning
+    if (delta?.reasoning_content)
-    // objects (summary / text / encrypted). Concatenate the plaintext fields
+      lifecycle = Lifecycle.reasoningDelta(lifecycle, events, "reasoning-0", delta.reasoning_content)
-    // into the reasoning delta stream; the structured array is preserved on
-    // the assistant message for round-trip via `providerMetadata`.
-    const detailText = (delta?.reasoning_details ?? [])
-      .map((detail) => (typeof detail.text === "string" ? detail.text : typeof detail.summary === "string" ? detail.summary : ""))
-      .join("")
-    const reasoning = delta?.reasoning_content ?? delta?.reasoning ?? (detailText.length > 0 ? detailText : undefined)
-    if (reasoning) lifecycle = Lifecycle.reasoningDelta(lifecycle, events, "reasoning-0", reasoning)
 
     if (delta?.content) lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.content)
 

packages/llm/src/protocols/openai-compatible-chat.ts

@@ -1,84 +1,22 @@
-import { Effect, Schema } from "effect"
 import { Route, type RouteRoutedModelInput } from "../route/client"
 import { Endpoint } from "../route/endpoint"
 import { Framing } from "../route/framing"
-import { Protocol } from "../route/protocol"
-import type { LLMRequest } from "../schema"
-import { ProviderOptions } from "./utils/provider-options"
 import * as OpenAIChat from "./openai-chat"
 
 const ADAPTER = "openai-compatible-chat"
 
 export type OpenAICompatibleChatModelInput = RouteRoutedModelInput
 
-const OpenAICompatibleChatBody = Schema.StructWithRest(
-  Schema.Struct({ ...OpenAIChat.bodyFields, reasoning_effort: Schema.optional(Schema.String) }),
-  [Schema.Record(Schema.String, Schema.Any)],
-)
-export type OpenAICompatibleChatBody = Schema.Schema.Type<typeof OpenAICompatibleChatBody>
-
-// Typed AI SDK `@ai-sdk/openai-compatible` options. Known keys are lowered
-// explicitly; everything else passes through to the wire body with its
-// top-level key snake-cased.
-interface CompatibleOptions {
-  readonly user?: string
-  readonly reasoningEffort?: string
-  readonly textVerbosity?: string
-  readonly strictJsonSchema?: boolean
-  readonly [extra: string]: unknown
-}
-const COMPATIBLE_KNOWN_KEYS: ReadonlySet<string> = new Set([
-  "user",
-  "reasoningEffort",
-  "textVerbosity",
-  "strictJsonSchema",
-])
-
-// Match AI SDK `@ai-sdk/openai-compatible` option resolution: the deprecated
-// `openai-compatible` alias, the canonical `openaiCompatible` key, the raw
-// provider name (dot-split so e.g. `opencode.internal` matches `opencode`),
-// and its camelCase variant. Later sources override earlier ones.
-const bodyOptions = (request: LLMRequest) => {
-  const provider = String(request.model.provider).split(".")[0]
-  const camel = provider.replace(/[_-]([a-z])/g, (_, value: string) => value.toUpperCase())
-  const options = ProviderOptions.merge(request, [
-    "openai-compatible",
-    "openaiCompatible",
-    provider,
-    camel,
-  ]) as CompatibleOptions
-  return {
-    ...ProviderOptions.passthrough(options, COMPATIBLE_KNOWN_KEYS),
-    ...(options.user !== undefined ? { user: options.user } : {}),
-    ...(options.reasoningEffort !== undefined ? { reasoning_effort: options.reasoningEffort } : {}),
-    ...(options.textVerbosity !== undefined ? { verbosity: options.textVerbosity } : {}),
-  }
-}
-
-export const protocol = Protocol.make({
-  id: ADAPTER,
-  body: {
-    schema: OpenAICompatibleChatBody,
-    // Drop providerOptions before delegating so OpenAI Chat's OpenAI-only
-    // option validation does not reject compatible-route requests whose
-    // provider id happens to be `openai` or use extended reasoning efforts.
-    from: (request) =>
-      OpenAIChat.protocol.body
-        .from({ ...request, providerOptions: undefined })
-        .pipe(Effect.map((body) => ({ ...body, ...bodyOptions(request) }))),
-  },
-  stream: OpenAIChat.protocol.stream,
-})
-
 /**
  * Route for non-OpenAI providers that expose an OpenAI Chat-compatible
- * `/chat/completions` endpoint. Reuses OpenAI Chat streaming behavior while
+ * `/chat/completions` endpoint. Reuses `OpenAIChat.protocol` end-to-end and
- * allowing compatible providers to pass through additional request-body
+ * overrides only the route id so providers can be resolved per-family without
- * options such as `enable_thinking` and extended reasoning efforts.
+ * colliding with native OpenAI. Provider helpers configure the route endpoint
+ * before model selection.
  */
 export const route = Route.make({
   id: ADAPTER,
-  protocol,
+  protocol: OpenAIChat.protocol,
   endpoint: Endpoint.path("/chat/completions"),
   framing: Framing.sse,
 })

packages/llm/src/protocols/openai-responses.ts

@@ -19,7 +19,6 @@ import {
 } from "../schema"
 import { JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared"
 import { OpenAIOptions } from "./utils/openai-options"
-import { ProviderOptions } from "./utils/provider-options"
 import { Lifecycle } from "./utils/lifecycle"
 import { ToolStream } from "./utils/tool-stream"
 
@@ -112,23 +111,12 @@ const OpenAIResponsesCoreFields = {
   tools: optionalArray(OpenAIResponsesTool),
   tool_choice: Schema.optional(OpenAIResponsesToolChoice),
   store: Schema.optional(Schema.Boolean),
-  conversation: Schema.optional(Schema.String),
-  max_tool_calls: Schema.optional(Schema.Number),
-  metadata: Schema.optional(JsonObject),
-  parallel_tool_calls: Schema.optional(Schema.Boolean),
-  previous_response_id: Schema.optional(Schema.String),
   prompt_cache_key: Schema.optional(Schema.String),
-  prompt_cache_retention: Schema.optional(Schema.String),
+  include: optionalArray(Schema.Literal("reasoning.encrypted_content")),
-  safety_identifier: Schema.optional(Schema.String),
-  service_tier: Schema.optional(Schema.String),
-  top_logprobs: Schema.optional(Schema.Number),
-  truncation: Schema.optional(Schema.String),
-  user: Schema.optional(Schema.String),
-  include: optionalArray(Schema.String),
   reasoning: Schema.optional(
     Schema.Struct({
       effort: Schema.optional(OpenAIOptions.OpenAIReasoningEffort),
-      summary: Schema.optional(Schema.String),
+      summary: Schema.optional(Schema.Literal("auto")),
     }),
   ),
   text: Schema.optional(
@@ -141,15 +129,10 @@ const OpenAIResponsesCoreFields = {
   top_p: Schema.optional(Schema.Number),
 }
 
-// Unknown provider options are passed through verbatim with their top-level
+const OpenAIResponsesBody = Schema.Struct({
-// key snake-cased; the rest record validates them against any JSON value.
+  ...OpenAIResponsesCoreFields,
-const OpenAIResponsesBody = Schema.StructWithRest(
+  stream: Schema.Literal(true),
-  Schema.Struct({
+})
-    ...OpenAIResponsesCoreFields,
-    stream: Schema.Literal(true),
-  }),
-  [Schema.Record(Schema.String, Schema.Any)],
-)
 export type OpenAIResponsesBody = Schema.Schema.Type<typeof OpenAIResponsesBody>
 
 const OpenAIResponsesWebSocketMessage = Schema.StructWithRest(
@@ -310,15 +293,14 @@ const lowerToolResultOutput = Effect.fn("OpenAIResponses.lowerToolResultOutput")
   // Text/json/error results are encoded as a plain string for backward
   // compatibility with existing cassettes and provider expectations.
   if (part.result.type !== "content") return ProviderShared.toolResultText(part)
-  const items: ReadonlyArray<ToolResultContentPart> = part.result.value
+  return yield* Effect.forEach(part.result.value, lowerToolResultContentItem)
-  return yield* Effect.forEach(items, lowerToolResultContentItem)
 })
 
 const lowerMessages = Effect.fn("OpenAIResponses.lowerMessages")(function* (request: LLMRequest) {
   const system: OpenAIResponsesInputItem[] =
     request.system.length === 0 ? [] : [{ role: "system", content: ProviderShared.joinText(request.system) }]
   const input: OpenAIResponsesInputItem[] = [...system]
-  const store = OpenAIOptions.options(request).store
+  const store = OpenAIOptions.store(request)
 
   for (const message of request.messages) {
     if (message.role === "user") {
@@ -373,47 +355,25 @@ const lowerMessages = Effect.fn("OpenAIResponses.lowerMessages")(function* (requ
   return input
 })
 
-const lowerOptions = (request: LLMRequest) => {
+const lowerOptions = Effect.fn("OpenAIResponses.lowerOptions")(function* (request: LLMRequest) {
-  const options = OpenAIOptions.options(request)
+  const store = OpenAIOptions.store(request)
-  // OpenAI Responses does not accept the `max` reasoning effort variant.
+  const promptCacheKey = OpenAIOptions.promptCacheKey(request)
-  const effort = OpenAIOptions.isReasoningEffort(options.reasoningEffort) ? options.reasoningEffort : undefined
+  const effort = OpenAIOptions.reasoningEffort(request)
-  const summary = options.reasoningSummary
+  if (effort && !OpenAIOptions.isReasoningEffort(effort))
-  const verbosity = options.textVerbosity
+    return yield* invalid(`OpenAI Responses does not support reasoning effort ${effort}`)
-  // `logprobs` is enabled only by `true` or a numeric top-N. `false` and
+  const summary = OpenAIOptions.reasoningSummary(request)
-  // `undefined` leave the request without the logprobs include + top_logprobs.
+  const encryptedState = OpenAIOptions.encryptedReasoning(request)
-  const logprobsEnabled = options.logprobs === true || typeof options.logprobs === "number"
+  const verbosity = OpenAIOptions.textVerbosity(request)
-  const include = (() => {
+  const instructions = OpenAIOptions.instructions(request)
-    const base = options.include ? [...options.include] : []
-    if (options.includeEncryptedReasoning && !base.includes("reasoning.encrypted_content")) {
-      base.push("reasoning.encrypted_content")
-    }
-    if (logprobsEnabled && !base.includes("message.output_text.logprobs")) {
-      base.push("message.output_text.logprobs")
-    }
-    return base.length > 0 ? base : undefined
-  })()
-  const topLogprobs = typeof options.logprobs === "number" ? options.logprobs : options.logprobs === true ? 20 : undefined
   return {
-    ...ProviderOptions.passthrough(options, OpenAIOptions.KNOWN_KEYS),
+    ...(instructions ? { instructions } : {}),
-    ...(options.instructions !== undefined ? { instructions: options.instructions } : {}),
+    ...(store !== undefined ? { store } : {}),
-    ...(options.store !== undefined ? { store: options.store } : {}),
+    ...(promptCacheKey ? { prompt_cache_key: promptCacheKey } : {}),
-    ...(options.conversation !== undefined ? { conversation: options.conversation } : {}),
+    ...(encryptedState ? { include: ["reasoning.encrypted_content"] as const } : {}),
-    ...(options.maxToolCalls !== undefined ? { max_tool_calls: options.maxToolCalls } : {}),
+    ...(effort || summary ? { reasoning: { effort, summary } } : {}),
-    ...(options.metadata !== undefined ? { metadata: options.metadata } : {}),
+    ...(verbosity ? { text: { verbosity } } : {}),
-    ...(options.parallelToolCalls !== undefined ? { parallel_tool_calls: options.parallelToolCalls } : {}),
-    ...(options.previousResponseId !== undefined ? { previous_response_id: options.previousResponseId } : {}),
-    ...(options.promptCacheKey !== undefined ? { prompt_cache_key: options.promptCacheKey } : {}),
-    ...(options.promptCacheRetention !== undefined ? { prompt_cache_retention: options.promptCacheRetention } : {}),
-    ...(options.safetyIdentifier !== undefined ? { safety_identifier: options.safetyIdentifier } : {}),
-    ...(options.serviceTier !== undefined ? { service_tier: options.serviceTier } : {}),
-    ...(topLogprobs !== undefined ? { top_logprobs: topLogprobs } : {}),
-    ...(options.truncation !== undefined ? { truncation: options.truncation } : {}),
-    ...(options.user !== undefined ? { user: options.user } : {}),
-    ...(include ? { include } : {}),
-    ...(effort !== undefined || summary !== undefined ? { reasoning: { effort, summary } } : {}),
-    ...(verbosity !== undefined ? { text: { verbosity } } : {}),
   }
-}
+})
 
 const fromRequest = Effect.fn("OpenAIResponses.fromRequest")(function* (request: LLMRequest) {
   const generation = request.generation
@@ -426,7 +386,7 @@ const fromRequest = Effect.fn("OpenAIResponses.fromRequest")(function* (request:
     max_output_tokens: generation?.maxTokens,
     temperature: generation?.temperature,
     top_p: generation?.topP,
-    ...lowerOptions(request),
+    ...(yield* lowerOptions(request)),
   }
 })
 

packages/llm/src/protocols/utils/openai-options.ts

@@ -1,73 +1,60 @@
 import { Schema } from "effect"
-import type { LLMRequest } from "../../schema"
+import type { LLMRequest, ReasoningEffort, TextVerbosity as TextVerbosityValue } from "../../schema"
-import { ReasoningEfforts, TextVerbosity, type ReasoningEffort } from "../../schema"
+import { ReasoningEfforts, TextVerbosity } from "../../schema"
-import { ProviderOptions } from "./provider-options"
 
 export const OpenAIReasoningEfforts = ReasoningEfforts.filter(
   (effort): effort is Exclude<ReasoningEffort, "max"> => effort !== "max",
 )
 export type OpenAIReasoningEffort = (typeof OpenAIReasoningEfforts)[number]
 
+const REASONING_EFFORTS = new Set<string>(ReasoningEfforts)
 const OPENAI_REASONING_EFFORTS = new Set<string>(OpenAIReasoningEfforts)
+const TEXT_VERBOSITY = new Set<string>(["low", "medium", "high"])
 
 export const OpenAIReasoningEffort = Schema.Literals(OpenAIReasoningEfforts)
 export const OpenAITextVerbosity = TextVerbosity
 
+const isAnyReasoningEffort = (effort: unknown): effort is ReasoningEffort =>
+  typeof effort === "string" && REASONING_EFFORTS.has(effort)
+
 export const isReasoningEffort = (effort: unknown): effort is OpenAIReasoningEffort =>
   typeof effort === "string" && OPENAI_REASONING_EFFORTS.has(effort)
 
-// Typed AI SDK OpenAI options. Mirrors the camelCase surface AI SDK accepts.
+const isTextVerbosity = (value: unknown): value is TextVerbosityValue =>
-// Known keys are typed; everything else passes through to the wire body with
+  typeof value === "string" && TEXT_VERBOSITY.has(value)
-// its top-level key snake-cased.
+
-export interface Options {
+const options = (request: LLMRequest) => request.providerOptions?.openai
-  readonly store?: boolean
+
-  readonly promptCacheKey?: string
+export const store = (request: LLMRequest): boolean | undefined => {
-  readonly promptCacheRetention?: string
+  const value = options(request)?.store
-  readonly reasoningEffort?: ReasoningEffort
+  return typeof value === "boolean" ? value : undefined
-  readonly reasoningSummary?: string
-  readonly textVerbosity?: "low" | "medium" | "high"
-  readonly include?: ReadonlyArray<string>
-  readonly includeEncryptedReasoning?: boolean
-  readonly instructions?: string
-  readonly conversation?: string
-  readonly maxToolCalls?: number
-  readonly metadata?: Record<string, unknown>
-  readonly parallelToolCalls?: boolean
-  readonly previousResponseId?: string
-  readonly safetyIdentifier?: string
-  readonly serviceTier?: string
-  readonly logprobs?: boolean | number
-  readonly truncation?: string
-  readonly user?: string
-  readonly [extra: string]: unknown
 }
 
-export const KNOWN_KEYS: ReadonlySet<string> = new Set([
+export const reasoningEffort = (request: LLMRequest): ReasoningEffort | undefined => {
-  "store",
+  const value = options(request)?.reasoningEffort
-  "promptCacheKey",
+  return isAnyReasoningEffort(value) ? value : undefined
-  "promptCacheRetention",
+}
-  "reasoningEffort",
-  "reasoningSummary",
-  "textVerbosity",
-  "include",
-  "includeEncryptedReasoning",
-  "instructions",
-  "conversation",
-  "maxToolCalls",
-  "metadata",
-  "parallelToolCalls",
-  "previousResponseId",
-  "safetyIdentifier",
-  "serviceTier",
-  "logprobs",
-  "truncation",
-  "user",
-])
 
-// Read the merged `openai` provider option bag. Producers
+export const reasoningSummary = (request: LLMRequest): "auto" | undefined => {
-// (`packages/opencode/src/provider/transform.ts`) emit typed values; we widen
+  return options(request)?.reasoningSummary === "auto" ? "auto" : undefined
-// only the index signature so passthrough keys remain reachable. Invalid
+}
-// shapes surface in the lowerer where they're consumed, not at decode time.
+
-export const options = (request: LLMRequest): Options => ProviderOptions.merge(request, ["openai"]) as Options
+export const encryptedReasoning = (request: LLMRequest) =>
+  options(request)?.includeEncryptedReasoning === true ? true : undefined
+
+export const promptCacheKey = (request: LLMRequest) => {
+  const value = options(request)?.promptCacheKey
+  return typeof value === "string" ? value : undefined
+}
+
+export const textVerbosity = (request: LLMRequest) => {
+  const value = options(request)?.textVerbosity
+  return isTextVerbosity(value) ? value : undefined
+}
+
+export const instructions = (request: LLMRequest) => {
+  const value = options(request)?.instructions
+  return typeof value === "string" ? value : undefined
+}
 
 export * as OpenAIOptions from "./openai-options"

packages/llm/src/protocols/utils/provider-options.ts

@@ -1,34 +0,0 @@
-import type { LLMRequest } from "../../schema"
-
-const isRecord = (value: unknown): value is Record<string, unknown> =>
-  typeof value === "object" && value !== null && !Array.isArray(value)
-
-// Convert a single top-level option key from camelCase to snake_case. Values
-// are left verbatim — recursive conversion would mangle structured payloads
-// (IDs, nested provider-shaped objects) and provider APIs do not require it.
-// PascalCase (`FooBar`) becomes `foo_bar` without a leading underscore.
-export const snakeKey = (key: string) =>
-  key.replace(/([a-z0-9])([A-Z])/g, "$1_$2").toLowerCase()
-
-// Merge provider option namespaces using AI SDK precedence semantics: later
-// sources override earlier ones, missing namespaces are skipped. Used by every
-// native protocol that reads request-level provider options.
-export const merge = (request: LLMRequest, keys: ReadonlyArray<string>) => {
-  const sources = keys.map((key) => request.providerOptions?.[key]).filter(isRecord)
-  return Object.assign({}, ...sources) as Record<string, unknown>
-}
-
-// Spread the unknown remainder of a merged option bag onto a provider body.
-// `consumed` lists keys already lowered explicitly so they aren't duplicated
-// or echoed at the wrong shape.
-export const passthrough = (options: Record<string, unknown>, consumed: ReadonlySet<string>) => {
-  const result: Record<string, unknown> = {}
-  for (const [key, value] of Object.entries(options)) {
-    if (consumed.has(key)) continue
-    if (value === undefined) continue
-    result[snakeKey(key)] = value
-  }
-  return result
-}
-
-export * as ProviderOptions from "./provider-options"

packages/llm/test/provider/anthropic-messages.test.ts

@@ -209,80 +209,6 @@ describe("Anthropic Messages route", () => {
     }),
   )
 
-  it.effect("lowers Anthropic thinking provider option (enabled)", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model,
-          prompt: "think",
-          providerOptions: { anthropic: { thinking: { type: "enabled", budgetTokens: 12345 } } },
-        }),
-      )
-      expect(prepared.body).toMatchObject({ thinking: { type: "enabled", budget_tokens: 12345 } })
-    }),
-  )
-
-  it.effect("lowers Anthropic adaptive thinking with effort sibling", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model,
-          prompt: "think",
-          providerOptions: { anthropic: { thinking: { type: "adaptive", display: "summarized" }, effort: "max" } },
-        }),
-      )
-      expect(prepared.body).toMatchObject({
-        thinking: { type: "adaptive", display: "summarized" },
-        effort: "max",
-      })
-    }),
-  )
-
-  it.effect("sets per-tool eager_input_streaming only when toolStreaming is true", () =>
-    Effect.gen(function* () {
-      const off = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
-        LLM.request({
-          model,
-          prompt: "use tool",
-          providerOptions: { anthropic: { toolStreaming: false } },
-          tools: [{ name: "lookup", description: "lookup", inputSchema: { type: "object" } }],
-        }),
-      )
-      expect(off.body.tools?.[0]?.eager_input_streaming).toBeUndefined()
-
-      const on = yield* LLMClient.prepare<AnthropicMessages.AnthropicMessagesBody>(
-        LLM.request({
-          model,
-          prompt: "use tool",
-          providerOptions: { anthropic: { toolStreaming: true } },
-          tools: [{ name: "lookup", description: "lookup", inputSchema: { type: "object" } }],
-        }),
-      )
-      expect(on.body.tools?.[0]?.eager_input_streaming).toBe(true)
-    }),
-  )
-
-  it.effect("passes unknown Anthropic provider options through with snake-cased keys", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model,
-          prompt: "go",
-          providerOptions: {
-            anthropic: {
-              anthropicBeta: ["claude-2024-07-15"],
-              customField: { keepCamelCase: true },
-            },
-          },
-        }),
-      )
-      expect(prepared.body).toMatchObject({
-        anthropic_beta: ["claude-2024-07-15"],
-        custom_field: { keepCamelCase: true },
-      })
-    }),
-  )
-
   it.effect("lowers preserved Anthropic reasoning signature metadata", () =>
     Effect.gen(function* () {
       const prepared = yield* LLMClient.prepare(

packages/llm/test/provider/openai-compatible-chat.test.ts

@@ -6,7 +6,7 @@ import { Auth, LLMClient } from "../../src/route"
 import * as OpenAICompatible from "../../src/providers/openai-compatible"
 import * as OpenAICompatibleChat from "../../src/protocols/openai-compatible-chat"
 import { it } from "../lib/effect"
-import { dynamicResponse, fixedResponse } from "../lib/http"
+import { dynamicResponse } from "../lib/http"
 import { sseEvents } from "../lib/sse"
 
 const Json = Schema.fromJsonString(Schema.Unknown)
@@ -199,134 +199,6 @@ describe("OpenAI-compatible Chat route", () => {
     }),
   )
 
-  it.effect("passes through compatible options and prior reasoning for tool continuations", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model,
-          providerOptions: {
-            deepseek: {
-              reasoningEffort: "max",
-              textVerbosity: "low",
-              promptCacheKey: "session_123",
-              strictJsonSchema: false,
-              enable_thinking: true,
-            },
-          },
-          messages: [
-            Message.user("Audit the site"),
-            Message.make({
-              role: "assistant",
-              native: { openaiCompatible: { reasoning_content: "I should inspect the page." } },
-              content: [ToolCallPart.make({ id: "call_1", name: "lookup", input: { query: "page" } })],
-            }),
-          ],
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({
-        reasoning_effort: "max",
-        verbosity: "low",
-        prompt_cache_key: "session_123",
-        enable_thinking: true,
-        messages: [
-          { role: "user", content: "Audit the site" },
-          {
-            role: "assistant",
-            reasoning_content: "I should inspect the page.",
-            tool_calls: [
-              {
-                id: "call_1",
-                function: { name: "lookup", arguments: '{"query":"page"}' },
-              },
-            ],
-          },
-        ],
-      })
-      expect(prepared.body).not.toHaveProperty("strictJsonSchema")
-    }),
-  )
-
-  it.effect("preserves structured reasoning_details on compatible continuations", () =>
-    Effect.gen(function* () {
-      const details = [
-        { type: "reasoning.text", text: "Let me work through this.", format: "anthropic-claude-v1", index: 0 },
-        { type: "reasoning.encrypted", data: "sha256:abc123", format: "anthropic-claude-v1", index: 1 },
-      ]
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model,
-          messages: [
-            Message.make({
-              role: "assistant",
-              native: { openaiCompatible: { reasoning_details: details } },
-              content: [ToolCallPart.make({ id: "call_1", name: "lookup", input: {} })],
-            }),
-          ],
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({
-        messages: [{ role: "assistant", reasoning_details: details }],
-      })
-    }),
-  )
-
-  it.effect("resolves dot-scoped compatible provider options", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model: OpenAICompatibleChat.route
-            .with({ provider: "opencode.internal", endpoint: { baseURL: "https://api.example.test/v1" } })
-            .model({ id: "reasoning-model" }),
-          prompt: "Think.",
-          providerOptions: { opencode: { reasoningEffort: "max", enable_thinking: true } },
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({ reasoning_effort: "max", enable_thinking: true })
-    }),
-  )
-
-  it.effect("does not apply OpenAI effort limits to compatible providers", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare(
-        LLM.request({
-          model: OpenAICompatibleChat.route
-            .with({ provider: "openai", endpoint: { baseURL: "https://compatible.example.test/v1" } })
-            .model({ id: "reasoning-model" }),
-          prompt: "Think.",
-          providerOptions: { openai: { reasoningEffort: "max" } },
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({ reasoning_effort: "max" })
-    }),
-  )
-
-  it.effect("parses compatible reasoning field variants", () =>
-    Effect.gen(function* () {
-      const response = yield* LLMClient.generate(request).pipe(
-        Effect.provide(
-          fixedResponse(
-            sseEvents(
-              deltaChunk({ reasoning: "fallback" }),
-              deltaChunk({
-                reasoning_details: [
-                  { type: "reasoning.text", text: " text-detail", format: "anthropic-claude-v1", index: 0 },
-                  { type: "reasoning.summary", summary: " summary-detail", format: "anthropic-claude-v1", index: 1 },
-                ],
-              }),
-              deltaChunk({}, "stop"),
-            ),
-          ),
-        ),
-      )
-
-      expect(response.reasoning).toBe("fallback text-detail summary-detail")
-    }),
-  )
-
   it.effect("posts to the configured compatible endpoint and parses text usage", () =>
     Effect.gen(function* () {
       const response = yield* LLMClient.generate(request).pipe(

packages/llm/test/provider/openai-responses.test.ts

@@ -407,30 +407,6 @@ describe("OpenAI Responses route", () => {
     }),
   )
 
-  it.effect("passes unknown OpenAI provider options through with snake-cased keys", () =>
-    Effect.gen(function* () {
-      const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(
-        LLM.request({
-          model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).model("gpt-5.2"),
-          prompt: "passthrough",
-          providerOptions: {
-            openai: {
-              customCamelCaseField: "value",
-              already_snake_case: 42,
-              nested: { keepCamelCase: true },
-            },
-          },
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({
-        custom_camel_case_field: "value",
-        already_snake_case: 42,
-        nested: { keepCamelCase: true },
-      })
-    }),
-  )
-
   it.effect("request OpenAI provider options override route defaults", () =>
     Effect.gen(function* () {
       const prepared = yield* LLMClient.prepare<OpenAIResponses.OpenAIResponsesBody>(

packages/opencode/src/account/account.ts

@@ -1,5 +1,5 @@
 import { Cache, Clock, Duration, Effect, Layer, Option, Schema, SchemaGetter, Context } from "effect"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import {
   FetchHttpClient,
   HttpClient,

packages/opencode/src/account/repo.ts

@@ -1,5 +1,5 @@
 import { eq } from "drizzle-orm"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Effect, Layer, Option, Schema, Context } from "effect"
 
 import { Database } from "@/storage/db"

packages/opencode/src/agent/agent.ts

@@ -1,5 +1,5 @@
 import { Config } from "@/config/config"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Provider } from "@/provider/provider"
 import { ModelID, ProviderID } from "../provider/schema"
 import { generateObject, streamObject, type ModelMessage } from "ai"

packages/opencode/src/bus/index.ts

@@ -5,7 +5,7 @@ import { BusEvent } from "./bus-event"
 import { GlobalBus } from "./global"
 import { InstanceState } from "@/effect/instance-state"
 import { makeRuntime } from "@/effect/run-service"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Identifier } from "@/id/id"
 import type { InstanceContext } from "@/project/instance-context"
 import { InstanceRef } from "@/effect/instance-ref"

packages/opencode/src/config/config.ts

@@ -1,5 +1,5 @@
 import * as Log from "@opencode-ai/core/util/log"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import path from "path"
 import { pathToFileURL } from "url"
 import os from "os"

packages/opencode/src/control-plane/workspace.ts

@@ -1,5 +1,5 @@
 import { Context, Effect, FiberMap, Iterable, Layer, Schema, Stream } from "effect"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { FetchHttpClient, HttpBody, HttpClient, HttpClientError, HttpClientRequest } from "effect/unstable/http"
 import { Database } from "@/storage/db"
 import { asc } from "drizzle-orm"

packages/opencode/src/env/index.ts

@@ -1,5 +1,5 @@
 import { Context, Effect, Layer } from "effect"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { InstanceState } from "@/effect/instance-state"
 
 type State = Record<string, string | undefined>

packages/opencode/src/file/index.ts

@@ -1,5 +1,5 @@
 import { BusEvent } from "@/bus/bus-event"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { InstanceState } from "@/effect/instance-state"
 
 import { AppFileSystem } from "@opencode-ai/core/filesystem"

packages/opencode/src/file/ripgrep.ts

@@ -1,5 +1,5 @@
 import path from "path"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Cause, Context, Effect, Fiber, Layer, Queue, Schema, Stream } from "effect"
 import type { PlatformError } from "effect/PlatformError"

packages/opencode/src/format/index.ts

@@ -1,5 +1,5 @@
 import { Effect, Layer, Context, Schema } from "effect"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { ChildProcess } from "effect/unstable/process"
 import { AppProcess } from "@opencode-ai/core/process"
 import { InstanceState } from "@/effect/instance-state"

packages/opencode/src/installation/index.ts

@@ -1,5 +1,5 @@
 import { Effect, Layer, Schema, Context, Stream } from "effect"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { FetchHttpClient, HttpClient, HttpClientRequest, HttpClientResponse } from "effect/unstable/http"
 import { withTransientReadRetry } from "@/util/effect-http-client"
 import { errorMessage } from "@/util/error"

packages/opencode/src/mcp/auth.ts

@@ -1,5 +1,5 @@
 import path from "path"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Global } from "@opencode-ai/core/global"
 import { Effect, Layer, Context, Option, Schema } from "effect"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"

packages/opencode/src/mcp/index.ts

@@ -1,5 +1,5 @@
 import { dynamicTool, type Tool, jsonSchema, type JSONSchema7 } from "ai"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Client } from "@modelcontextprotocol/sdk/client/index.js"
 import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
 import { SSEClientTransport } from "@modelcontextprotocol/sdk/client/sse.js"

packages/opencode/src/project/instance-store.ts

@@ -1,5 +1,5 @@
 import { GlobalBus } from "@/bus/global"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { WorkspaceContext } from "@/control-plane/workspace-context"
 import { InstanceRef } from "@/effect/instance-ref"
 import { disposeInstance as runDisposers } from "@/effect/instance-registry"

packages/opencode/src/project/project.ts

@@ -20,7 +20,7 @@ import { AppProcess } from "@opencode-ai/core/process"
 import { Project as ProjectV2 } from "@opencode-ai/core/project"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
 import { AbsolutePath, NonNegativeInt, optionalOmitUndefined } from "@opencode-ai/core/schema"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { RuntimeFlags } from "@/effect/runtime-flags"
 
 const log = Log.create({ service: "project" })

packages/opencode/src/provider/auth.ts

@@ -1,5 +1,5 @@
 import type { AuthOAuthResult, Hooks } from "@opencode-ai/plugin"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Auth } from "@/auth"
 import { InstanceState } from "@/effect/instance-state"
 import { optionalOmitUndefined } from "@opencode-ai/core/schema"

packages/opencode/src/provider/provider.ts

@@ -7,7 +7,7 @@ import * as Log from "@opencode-ai/core/util/log"
 import { Npm } from "@opencode-ai/core/npm"
 import { Hash } from "@opencode-ai/core/util/hash"
 import { Plugin } from "../plugin"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { type LanguageModelV3 } from "@ai-sdk/provider"
 import * as ModelsDev from "@opencode-ai/core/models-dev"
 import { Auth } from "../auth"

packages/opencode/src/session/compaction.ts

@@ -16,7 +16,7 @@ import { Effect, Layer, Context, Schema } from "effect"
 import * as DateTime from "effect/DateTime"
 import { InstanceState } from "@/effect/instance-state"
 import { isOverflow as overflow, usable } from "./overflow"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { RuntimeFlags } from "@/effect/runtime-flags"
 import { EventV2Bridge } from "@/event-v2-bridge"
 import { SessionEvent } from "@opencode-ai/core/session-event"

packages/opencode/src/session/llm.ts

@@ -1,5 +1,5 @@
 import { Provider } from "@/provider/provider"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import * as Log from "@opencode-ai/core/util/log"
 import { Context, Effect, Layer } from "effect"
 import * as Stream from "effect/Stream"

packages/opencode/src/session/llm/native-request.ts

@@ -110,9 +110,7 @@ const messages = (input: readonly ModelMessage[]) => {
       Message.make({
         role: message.role,
         content: content(message.content),
-        // Message provider options are already provider-native wire metadata
+        native: isRecord(message.providerOptions) ? { providerOptions: message.providerOptions } : undefined,
-        // (for example DeepSeek's reasoning_content continuation field).
-        native: isRecord(message.providerOptions) ? message.providerOptions : undefined,
       }),
     ]
   })

packages/opencode/src/session/session.ts

@@ -1,5 +1,5 @@
 import { Slug } from "@opencode-ai/core/util/slug"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import path from "path"
 import { BackgroundJob } from "@/background/job"
 import { BusEvent } from "@/bus/bus-event"

packages/opencode/src/share/share-next.ts

@@ -1,5 +1,5 @@
 import type * as SDK from "@opencode-ai/sdk/v2"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { Effect, Exit, Layer, Option, Schema, Scope, Context, Stream } from "effect"
 import { FetchHttpClient, HttpClient, HttpClientRequest, HttpClientResponse } from "effect/unstable/http"
 import { Account } from "@/account/account"

packages/opencode/src/skill/index.ts

@@ -16,6 +16,7 @@ import * as Log from "@opencode-ai/core/util/log"
 import { Discovery } from "./discovery"
 import CUSTOMIZE_OPENCODE_SKILL_BODY from "./prompt/customize-opencode.md" with { type: "text" }
 import { isRecord } from "@/util/record"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 
 const log = Log.create({ service: "skill" })
 const CLAUDE_EXTERNAL_DIR = ".claude"
@@ -243,6 +244,8 @@ const loadSkills = Effect.fnUntraced(function* (state: State, discovered: Discov
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Skill") {}
 
+export const use = serviceUse(Service)
+
 export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {

packages/opencode/src/sync/index.ts

@@ -12,7 +12,7 @@ import { EventID } from "./schema"
 import { Context, Effect, Layer, Schema as EffectSchema } from "effect"
 import type { DeepMutable } from "@opencode-ai/core/schema"
 import { EventV2 } from "@opencode-ai/core/event"
-import { serviceUse } from "@/effect/service-use"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 import { InstanceState } from "@/effect/instance-state"
 import { RuntimeFlags } from "@/effect/runtime-flags"
 import { EffectBridge } from "@/effect/bridge"

packages/opencode/src/tool/registry.ts

@@ -55,6 +55,7 @@ import { Reference } from "@/reference/reference"
 import { BackgroundJob } from "@/background/job"
 import { SessionStatus } from "@/session/status"
 import { RuntimeFlags } from "@/effect/runtime-flags"
+import { serviceUse } from "@opencode-ai/core/effect/service-use"
 
 const log = Log.create({ service: "tool.registry" })
 
@@ -81,6 +82,8 @@ export interface Interface {
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/ToolRegistry") {}
 
+export const use = serviceUse(Service)
+
 export const layer: Layer.Layer<
   Service,
   never,

packages/opencode/test/file/index.test.ts

@@ -3,7 +3,6 @@ import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { $ } from "bun"
 import { Cause, Effect, Exit, Layer } from "effect"
 import path from "path"
-import fs from "fs/promises"
 import { File } from "../../src/file"
 import { disposeAllInstances, TestInstance, withTmpdirInstance } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
@@ -48,6 +47,11 @@ const gitAddAll = (directory: string) => Effect.promise(() => $`git add .`.cwd(d
 const gitCommit = (directory: string, message: string) =>
   Effect.promise(() => $`git commit -m ${message}`.cwd(directory).quiet())
 
+const writeFixtureFile = (directory: string, file: string, content: string | Uint8Array) =>
+  AppFileSystem.use.writeWithDirs(path.join(directory, file), content)
+
+const removeFixtureFile = (directory: string, file: string) => AppFileSystem.use.remove(path.join(directory, file))
+
 const failureMessage = <A, E, R>(self: Effect.Effect<A, E, R>) =>
   Effect.gen(function* () {
     const exit = yield* self.pipe(Effect.exit)
@@ -72,7 +76,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("reads text file via Filesystem.readText()", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "test.txt"), "Hello World", "utf-8"))
+        yield* writeFixtureFile(test.directory, "test.txt", "Hello World")
 
         const result = yield* read("test.txt")
         expect(result.type).toBe("text")
@@ -91,9 +95,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("trims whitespace from text content", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "test.txt", "  content with spaces  \n\n")
-          fs.writeFile(path.join(test.directory, "test.txt"), "  content with spaces  \n\n", "utf-8"),
-        )
 
         const result = yield* read("test.txt")
         expect(result.content).toBe("content with spaces")
@@ -103,7 +105,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("handles empty text file", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "empty.txt"), "", "utf-8"))
+        yield* writeFixtureFile(test.directory, "empty.txt", "")
 
         const result = yield* read("empty.txt")
         expect(result.type).toBe("text")
@@ -114,9 +116,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("handles multi-line text files", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "multiline.txt", "line1\nline2\nline3")
-          fs.writeFile(path.join(test.directory, "multiline.txt"), "line1\nline2\nline3", "utf-8"),
-        )
 
         const result = yield* read("multiline.txt")
         expect(result.content).toBe("line1\nline2\nline3")
@@ -129,7 +129,7 @@ describe("file/index Filesystem patterns", () => {
       Effect.gen(function* () {
         const test = yield* TestInstance
         const binaryContent = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "image.png"), binaryContent))
+        yield* writeFixtureFile(test.directory, "image.png", binaryContent)
 
         const result = yield* read("image.png")
         expect(result.type).toBe("text")
@@ -142,9 +142,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("returns empty for binary non-image files", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "binary.so", Buffer.from([0x7f, 0x45, 0x4c, 0x46]))
-          fs.writeFile(path.join(test.directory, "binary.so"), Buffer.from([0x7f, 0x45, 0x4c, 0x46])),
-        )
 
         const result = yield* read("binary.so")
         expect(result.type).toBe("binary")
@@ -158,7 +156,7 @@ describe("file/index Filesystem patterns", () => {
       Effect.gen(function* () {
         const test = yield* TestInstance
         const filepath = path.join(test.directory, "test.json")
-        yield* Effect.promise(() => fs.writeFile(filepath, '{"key": "value"}', "utf-8"))
+        yield* AppFileSystem.use.writeWithDirs(filepath, '{"key": "value"}')
 
         expect(AppFileSystem.mimeType(filepath)).toContain("application/json")
 
@@ -179,7 +177,7 @@ describe("file/index Filesystem patterns", () => {
 
         for (const testCase of testCases) {
           const filepath = path.join(test.directory, `test.${testCase.ext}`)
-          yield* Effect.promise(() => fs.writeFile(filepath, Buffer.from([0x00, 0x00, 0x00, 0x00])))
+          yield* AppFileSystem.use.writeWithDirs(filepath, Buffer.from([0x00, 0x00, 0x00, 0x00]))
           expect(AppFileSystem.mimeType(filepath)).toContain(testCase.mime)
         }
       }),
@@ -288,9 +286,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("treats .ts files as text", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "test.ts", "export const value = 1")
-          fs.writeFile(path.join(test.directory, "test.ts"), "export const value = 1", "utf-8"),
-        )
 
         const result = yield* read("test.ts")
         expect(result.type).toBe("text")
@@ -301,9 +297,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("treats .mts files as text", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "test.mts", "export const value = 1")
-          fs.writeFile(path.join(test.directory, "test.mts"), "export const value = 1", "utf-8"),
-        )
 
         const result = yield* read("test.mts")
         expect(result.type).toBe("text")
@@ -314,9 +308,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("treats .sh files as text", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "test.sh", "#!/usr/bin/env bash\necho hello")
-          fs.writeFile(path.join(test.directory, "test.sh"), "#!/usr/bin/env bash\necho hello", "utf-8"),
-        )
 
         const result = yield* read("test.sh")
         expect(result.type).toBe("text")
@@ -327,7 +319,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("treats Dockerfile as text", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "Dockerfile"), "FROM alpine:3.20", "utf-8"))
+        yield* writeFixtureFile(test.directory, "Dockerfile", "FROM alpine:3.20")
 
         const result = yield* read("Dockerfile")
         expect(result.type).toBe("text")
@@ -338,7 +330,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("returns encoding info for text files", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "test.txt"), "simple text", "utf-8"))
+        yield* writeFixtureFile(test.directory, "test.txt", "simple text")
 
         const result = yield* read("test.txt")
         expect(result.encoding).toBeUndefined()
@@ -349,9 +341,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("returns base64 encoding for images", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() =>
+        yield* writeFixtureFile(test.directory, "test.jpg", Buffer.from([0xff, 0xd8, 0xff, 0xe0]))
-          fs.writeFile(path.join(test.directory, "test.jpg"), Buffer.from([0xff, 0xd8, 0xff, 0xe0])),
-        )
 
         const result = yield* read("test.jpg")
         expect(result.encoding).toBe("base64")
@@ -381,10 +371,10 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "file.txt")
-          yield* Effect.promise(() => fs.writeFile(filepath, "original\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "original\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add file")
-          yield* Effect.promise(() => fs.writeFile(filepath, "modified\nextra line\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "modified\nextra line\n")
 
           const result = yield* status()
           const entry = result.find((file) => file.path === "file.txt")
@@ -401,9 +391,7 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() =>
+          yield* writeFixtureFile(test.directory, "new.txt", "line1\nline2\nline3\n")
-            fs.writeFile(path.join(test.directory, "new.txt"), "line1\nline2\nline3\n", "utf-8"),
-          )
 
           const result = yield* status()
           const entry = result.find((file) => file.path === "new.txt")
@@ -421,10 +409,10 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "gone.txt")
-          yield* Effect.promise(() => fs.writeFile(filepath, "content\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "content\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add file")
-          yield* Effect.promise(() => fs.rm(filepath))
+          yield* AppFileSystem.use.remove(filepath)
 
           const result = yield* status()
           const entries = result.filter((file) => file.path === "gone.txt")
@@ -438,14 +426,14 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "keep.txt"), "keep\n", "utf-8"))
+          yield* writeFixtureFile(test.directory, "keep.txt", "keep\n")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "remove.txt"), "remove\n", "utf-8"))
+          yield* writeFixtureFile(test.directory, "remove.txt", "remove\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "initial")
 
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "keep.txt"), "changed\n", "utf-8"))
+          yield* writeFixtureFile(test.directory, "keep.txt", "changed\n")
-          yield* Effect.promise(() => fs.rm(path.join(test.directory, "remove.txt")))
+          yield* removeFixtureFile(test.directory, "remove.txt")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "brand-new.txt"), "hello\n", "utf-8"))
+          yield* writeFixtureFile(test.directory, "brand-new.txt", "hello\n")
 
           const result = yield* status()
           expect(result.some((file) => file.path === "keep.txt" && file.status === "modified")).toBe(true)
@@ -476,13 +464,15 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "data.bin")
-          yield* Effect.promise(() =>
+          yield* AppFileSystem.use.writeWithDirs(
-            fs.writeFile(filepath, Buffer.from(Array.from({ length: 256 }, (_, index) => index))),
+            filepath,
+            Buffer.from(Array.from({ length: 256 }, (_, index) => index)),
           )
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add binary")
-          yield* Effect.promise(() =>
+          yield* AppFileSystem.use.writeWithDirs(
-            fs.writeFile(filepath, Buffer.from(Array.from({ length: 512 }, (_, index) => index % 256))),
+            filepath,
+            Buffer.from(Array.from({ length: 512 }, (_, index) => index % 256)),
           )
 
           const result = yield* status()
@@ -502,11 +492,9 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.mkdir(path.join(test.directory, "subdir")))
+          yield* AppFileSystem.use.ensureDir(path.join(test.directory, "subdir"))
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "file.txt"), "content", "utf-8"))
+          yield* writeFixtureFile(test.directory, "file.txt", "content")
-          yield* Effect.promise(() =>
+          yield* writeFixtureFile(test.directory, path.join("subdir", "nested.txt"), "nested")
-            fs.writeFile(path.join(test.directory, "subdir", "nested.txt"), "nested", "utf-8"),
-          )
 
           const nodes = yield* list()
           expect(nodes.length).toBeGreaterThanOrEqual(2)
@@ -527,10 +515,10 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.mkdir(path.join(test.directory, "beta")))
+          yield* AppFileSystem.use.ensureDir(path.join(test.directory, "beta"))
-          yield* Effect.promise(() => fs.mkdir(path.join(test.directory, "alpha")))
+          yield* AppFileSystem.use.ensureDir(path.join(test.directory, "alpha"))
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "zz.txt"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, "zz.txt", "")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "aa.txt"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, "aa.txt", "")
 
           const nodes = yield* list()
           const dirs = nodes.filter((node) => node.type === "directory")
@@ -551,8 +539,8 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, ".DS_Store"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, ".DS_Store", "")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "visible.txt"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, "visible.txt", "")
 
           const names = (yield* list()).map((node) => node.name)
           expect(names).not.toContain(".git")
@@ -567,10 +555,10 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, ".gitignore"), "*.log\nbuild/\n", "utf-8"))
+          yield* writeFixtureFile(test.directory, ".gitignore", "*.log\nbuild/\n")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "app.log"), "log data", "utf-8"))
+          yield* writeFixtureFile(test.directory, "app.log", "log data")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "main.ts"), "code", "utf-8"))
+          yield* writeFixtureFile(test.directory, "main.ts", "code")
-          yield* Effect.promise(() => fs.mkdir(path.join(test.directory, "build")))
+          yield* AppFileSystem.use.ensureDir(path.join(test.directory, "build"))
 
           const nodes = yield* list()
           expect(nodes.find((node) => node.name === "app.log")?.ignored).toBe(true)
@@ -585,9 +573,9 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.mkdir(path.join(test.directory, "sub")))
+          yield* AppFileSystem.use.ensureDir(path.join(test.directory, "sub"))
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "sub", "a.txt"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, path.join("sub", "a.txt"), "")
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "sub", "b.txt"), "", "utf-8"))
+          yield* writeFixtureFile(test.directory, path.join("sub", "b.txt"), "")
 
           const nodes = yield* list("sub")
           expect(nodes.length).toBe(2)
@@ -609,7 +597,7 @@ describe("file/index Filesystem patterns", () => {
     it.instance("works without git", () =>
       Effect.gen(function* () {
         const test = yield* TestInstance
-        yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "file.txt"), "hi", "utf-8"))
+        yield* writeFixtureFile(test.directory, "file.txt", "hi")
 
         const nodes = yield* list()
         expect(nodes.length).toBeGreaterThanOrEqual(1)
@@ -755,7 +743,7 @@ describe("file/index Filesystem patterns", () => {
           yield* init()
           expect(yield* search({ query: "fresh", type: "file" })).toEqual([])
 
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "fresh.ts"), "fresh", "utf-8"))
+          yield* writeFixtureFile(test.directory, "fresh.ts", "fresh")
 
           expect(yield* search({ query: "fresh", type: "file" })).toContain("fresh.ts")
         }),
@@ -770,10 +758,10 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "file.txt")
-          yield* Effect.promise(() => fs.writeFile(filepath, "original content\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "original content\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add file")
-          yield* Effect.promise(() => fs.writeFile(filepath, "modified content\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "modified content\n")
 
           const result = yield* read("file.txt")
           expect(result.type).toBe("text")
@@ -793,10 +781,10 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "staged.txt")
-          yield* Effect.promise(() => fs.writeFile(filepath, "before\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "before\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add file")
-          yield* Effect.promise(() => fs.writeFile(filepath, "after\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "after\n")
           yield* gitAddAll(test.directory)
 
           const result = yield* read("staged.txt")
@@ -812,7 +800,7 @@ describe("file/index Filesystem patterns", () => {
         Effect.gen(function* () {
           const test = yield* TestInstance
           const filepath = path.join(test.directory, "clean.txt")
-          yield* Effect.promise(() => fs.writeFile(filepath, "unchanged\n", "utf-8"))
+          yield* AppFileSystem.use.writeWithDirs(filepath, "unchanged\n")
           yield* gitAddAll(test.directory)
           yield* gitCommit(test.directory, "add file")
 
@@ -832,14 +820,14 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const one = yield* TestInstance
-          yield* Effect.promise(() => fs.writeFile(path.join(one.directory, "a.ts"), "one", "utf-8"))
+          yield* writeFixtureFile(one.directory, "a.ts", "one")
           yield* init()
           expect(yield* search({ query: "a.ts", type: "file" })).toContain("a.ts")
           expect(yield* search({ query: "b.ts", type: "file" })).not.toContain("b.ts")
 
           yield* Effect.gen(function* () {
             const two = yield* TestInstance
-            yield* Effect.promise(() => fs.writeFile(path.join(two.directory, "b.ts"), "two", "utf-8"))
+            yield* writeFixtureFile(two.directory, "b.ts", "two")
             yield* init()
             expect(yield* search({ query: "b.ts", type: "file" })).toContain("b.ts")
             expect(yield* search({ query: "a.ts", type: "file" })).not.toContain("a.ts")
@@ -853,14 +841,14 @@ describe("file/index Filesystem patterns", () => {
       () =>
         Effect.gen(function* () {
           const test = yield* TestInstance
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "before.ts"), "before", "utf-8"))
+          yield* writeFixtureFile(test.directory, "before.ts", "before")
           yield* init()
           expect(yield* search({ query: "before", type: "file" })).toContain("before.ts")
 
           yield* Effect.promise(() => disposeAllInstances())
 
-          yield* Effect.promise(() => fs.writeFile(path.join(test.directory, "after.ts"), "after", "utf-8"))
+          yield* writeFixtureFile(test.directory, "after.ts", "after")
-          yield* Effect.promise(() => fs.rm(path.join(test.directory, "before.ts")))
+          yield* removeFixtureFile(test.directory, "before.ts")
 
           yield* init()
           expect(yield* search({ query: "after", type: "file" })).toContain("after.ts")

packages/opencode/test/fixtures/recordings/session/native-zen-tool-loop.json

@@ -17,7 +17,7 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"gpt-5.2-codex\",\"input\":[{\"role\":\"system\",\"content\":\"Answer using tools when appropriate.\\nUse the get_weather tool exactly once to look up Paris, then reply with exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"input_text\",\"text\":\"What is the weather in Paris?\"}]}],\"tools\":[{\"type\":\"function\",\"name\":\"get_weather\",\"description\":\"Get the current weather for a city.\",\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"store\":false,\"prompt_cache_key\":\"session-recorded-opencode-loop\",\"include\":[\"reasoning.encrypted_content\"],\"reasoning\":{\"effort\":\"medium\",\"summary\":\"auto\"},\"max_output_tokens\":32000,\"stream\":true}"
+        "body": "{\"model\":\"gpt-5.2-codex\",\"input\":[{\"role\":\"system\",\"content\":\"Answer using tools when appropriate.\\nUse the get_weather tool exactly once to look up Paris, then reply with exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"input_text\",\"text\":\"What is the weather in Paris?\"}]}],\"tools\":[{\"type\":\"function\",\"name\":\"get_weather\",\"description\":\"Get the current weather for a city.\",\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"store\":false,\"prompt_cache_key\":\"session-recorded-opencode-loop\",\"reasoning\":{\"effort\":\"medium\",\"summary\":\"auto\"},\"max_output_tokens\":32000,\"stream\":true}"
       },
       "response": {
         "status": 200,
@@ -35,7 +35,7 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"gpt-5.2-codex\",\"input\":[{\"role\":\"system\",\"content\":\"Answer using tools when appropriate.\\nUse the get_weather tool exactly once to look up Paris, then reply with exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"input_text\",\"text\":\"What is the weather in Paris?\"}]},{\"type\":\"function_call\",\"call_id\":\"call_DfI0RwTrlaizfnQ9zkJC8rks\",\"name\":\"get_weather\",\"arguments\":\"{\\\"city\\\":{}}\"},{\"type\":\"function_call_output\",\"call_id\":\"call_DfI0RwTrlaizfnQ9zkJC8rks\",\"output\":\"{\\\"temperature\\\":22,\\\"condition\\\":\\\"sunny\\\"}\"}],\"tools\":[{\"type\":\"function\",\"name\":\"get_weather\",\"description\":\"Get the current weather for a city.\",\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"store\":false,\"prompt_cache_key\":\"session-recorded-opencode-loop\",\"include\":[\"reasoning.encrypted_content\"],\"reasoning\":{\"effort\":\"medium\",\"summary\":\"auto\"},\"max_output_tokens\":32000,\"stream\":true}"
+        "body": "{\"model\":\"gpt-5.2-codex\",\"input\":[{\"role\":\"system\",\"content\":\"Answer using tools when appropriate.\\nUse the get_weather tool exactly once to look up Paris, then reply with exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"input_text\",\"text\":\"What is the weather in Paris?\"}]},{\"type\":\"function_call\",\"call_id\":\"call_DfI0RwTrlaizfnQ9zkJC8rks\",\"name\":\"get_weather\",\"arguments\":\"{\\\"city\\\":{}}\"},{\"type\":\"function_call_output\",\"call_id\":\"call_DfI0RwTrlaizfnQ9zkJC8rks\",\"output\":\"{\\\"temperature\\\":22,\\\"condition\\\":\\\"sunny\\\"}\"}],\"tools\":[{\"type\":\"function\",\"name\":\"get_weather\",\"description\":\"Get the current weather for a city.\",\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"store\":false,\"prompt_cache_key\":\"session-recorded-opencode-loop\",\"reasoning\":{\"effort\":\"medium\",\"summary\":\"auto\"},\"max_output_tokens\":32000,\"stream\":true}"
       },
       "response": {
         "status": 200,

packages/opencode/test/lsp/client.test.ts

@@ -1,11 +1,16 @@
-import { beforeEach, describe, expect, test } from "bun:test"
+import { beforeEach, describe, expect } from "bun:test"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import path from "path"
 import { pathToFileURL } from "url"
-import { tmpdir, withTestInstance } from "../fixture/fixture"
+import { Effect } from "effect"
+import { pollWithTimeout, testEffect } from "../lib/effect"
+import { requireInstance, TestInstance } from "../fixture/fixture"
 import { LSPClient } from "@/lsp/client"
 import * as LSPServer from "@/lsp/server"
 import * as Log from "@opencode-ai/core/util/log"
 
+const it = testEffect(AppFileSystem.defaultLayer)
+
 function spawnFakeServer() {
   const { spawn } = require("child_process")
   const serverPath = path.join(__dirname, "../fixture/lsp/fake-lsp-server.js")
@@ -16,202 +21,164 @@ function spawnFakeServer() {
   }
 }
 
+const createClient = (handle: LSPServer.Handle, initialization?: LSPServer.Handle["initialization"]) =>
+  Effect.gen(function* () {
+    const test = yield* TestInstance
+    const instance = yield* requireInstance
+    return yield* Effect.promise(() =>
+      LSPClient.create({
+        serverID: "fake",
+        server: initialization ? { ...handle, initialization } : handle,
+        root: test.directory,
+        directory: test.directory,
+        instance,
+      }),
+    )
+  })
+
+const createScopedClient = (handle: LSPServer.Handle, initialization?: LSPServer.Handle["initialization"]) =>
+  Effect.gen(function* () {
+    const client = yield* createClient(handle, initialization)
+    yield* Effect.addFinalizer(() => Effect.promise(() => client.shutdown()).pipe(Effect.ignore))
+    return client
+  })
+
+const writeFile = (file: string, content: string) => AppFileSystem.use.writeWithDirs(file, content)
+
 describe("LSPClient interop", () => {
   beforeEach(async () => {
     await Log.init({ print: true })
   })
 
-  test("handles workspace/workspaceFolders request", async () => {
+  it.instance("handles workspace/workspaceFolders request", () =>
-    const handle = spawnFakeServer() as any
+    Effect.gen(function* () {
+      const client = yield* createScopedClient(spawnFakeServer())
 
-    const client = await withTestInstance({
+      yield* Effect.promise(() =>
-      directory: process.cwd(),
+        client.connection.sendNotification("test/trigger", {
-      fn: (ctx) =>
+          method: "workspace/workspaceFolders",
-        LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: process.cwd(),
-          directory: process.cwd(),
-          instance: ctx,
         }),
-    })
+      )
 
-    await client.connection.sendNotification("test/trigger", {
+      yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {}))
-      method: "workspace/workspaceFolders",
+      expect(client.connection).toBeDefined()
-    })
+    }),
+  )
 
-    await new Promise((resolve) => setTimeout(resolve, 100))
+  it.instance("handles client/registerCapability request", () =>
-    expect(client.connection).toBeDefined()
+    Effect.gen(function* () {
-    await client.shutdown()
+      const client = yield* createScopedClient(spawnFakeServer())
-  })
 
-  test("handles client/registerCapability request", async () => {
+      yield* Effect.promise(() =>
-    const handle = spawnFakeServer() as any
+        client.connection.sendNotification("test/trigger", {
-
+          method: "client/registerCapability",
-    const client = await withTestInstance({
-      directory: process.cwd(),
-      fn: (ctx) =>
-        LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: process.cwd(),
-          directory: process.cwd(),
-          instance: ctx,
         }),
-    })
+      )
 
-    await client.connection.sendNotification("test/trigger", {
+      yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {}))
-      method: "client/registerCapability",
+      expect(client.connection).toBeDefined()
-    })
+    }),
+  )
 
-    await new Promise((resolve) => setTimeout(resolve, 100))
+  it.instance("handles client/unregisterCapability request", () =>
-    expect(client.connection).toBeDefined()
+    Effect.gen(function* () {
-    await client.shutdown()
+      const client = yield* createScopedClient(spawnFakeServer())
-  })
 
-  test("handles client/unregisterCapability request", async () => {
+      yield* Effect.promise(() =>
-    const handle = spawnFakeServer() as any
+        client.connection.sendNotification("test/trigger", {
-
+          method: "client/unregisterCapability",
-    const client = await withTestInstance({
-      directory: process.cwd(),
-      fn: (ctx) =>
-        LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: process.cwd(),
-          directory: process.cwd(),
-          instance: ctx,
         }),
-    })
+      )
 
-    await client.connection.sendNotification("test/trigger", {
+      yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {}))
-      method: "client/unregisterCapability",
+      expect(client.connection).toBeDefined()
-    })
+    }),
+  )
 
-    await new Promise((resolve) => setTimeout(resolve, 100))
+  it.instance("initialize does not overclaim unsupported diagnostics capabilities", () =>
-    expect(client.connection).toBeDefined()
+    Effect.gen(function* () {
-    await client.shutdown()
+      const client = yield* createScopedClient(spawnFakeServer())
-  })
 
-  test("initialize does not overclaim unsupported diagnostics capabilities", async () => {
+      const params = yield* Effect.promise(() =>
-    const handle = spawnFakeServer() as any
+        client.connection.sendRequest<{
+          capabilities: {
+            workspace: { diagnostics: { refreshSupport: boolean } }
+            textDocument: { publishDiagnostics: { versionSupport: boolean } }
+          }
+        }>("test/get-initialize-params", {}),
+      )
+      expect(params.capabilities.workspace.diagnostics.refreshSupport).toBe(false)
+      expect(params.capabilities.textDocument.publishDiagnostics.versionSupport).toBe(false)
+    }),
+  )
 
-    const client = await withTestInstance({
+  it.instance("workspace/configuration returns one result per requested item", () =>
-      directory: process.cwd(),
+    Effect.gen(function* () {
-      fn: (ctx) =>
+      const initialization = {
-        LSPClient.create({
+        alpha: {
-          serverID: "fake",
+          beta: 1,
-          server: handle as unknown as LSPServer.Handle,
+        },
-          root: process.cwd(),
+        gamma: true,
-          directory: process.cwd(),
+      }
-          instance: ctx,
+
+      const client = yield* createScopedClient(spawnFakeServer(), initialization)
+
+      const response = yield* Effect.promise(() =>
+        client.connection.sendRequest<unknown[]>("test/request-configuration", {
+          items: [{ section: "alpha" }, { section: "alpha.beta" }, { section: "missing" }, {}],
         }),
-    })
+      )
 
-    const params = await client.connection.sendRequest<any>("test/get-initialize-params", {})
+      expect(response).toEqual([{ beta: 1 }, 1, null, initialization])
-    expect(params.capabilities.workspace.diagnostics.refreshSupport).toBe(false)
+    }),
-    expect(params.capabilities.textDocument.publishDiagnostics.versionSupport).toBe(false)
+  )
 
-    await client.shutdown()
+  it.instance("sends ranged didChange for incremental sync servers", () =>
-  })
+    Effect.gen(function* () {
+      const test = yield* TestInstance
+      const file = path.join(test.directory, "client.ts")
+      yield* writeFile(file, "first\n")
 
-  test("workspace/configuration returns one result per requested item", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    const initialization = {
-      alpha: {
-        beta: 1,
-      },
-      gamma: true,
-    }
 
-    const client = await withTestInstance({
+      yield* Effect.promise(() => client.notify.open({ path: file }))
-      directory: process.cwd(),
+      yield* writeFile(file, "second\nthird\n")
-      fn: (ctx) =>
+      yield* Effect.promise(() => client.notify.open({ path: file }))
-        LSPClient.create({
-          serverID: "fake",
-          server: {
-            ...(handle as unknown as LSPServer.Handle),
-            initialization,
-          },
-          root: process.cwd(),
-          directory: process.cwd(),
-          instance: ctx,
-        }),
-    })
 
-    const response = await client.connection.sendRequest<any[]>("test/request-configuration", {
+      const change = yield* Effect.promise(() =>
-      items: [{ section: "alpha" }, { section: "alpha.beta" }, { section: "missing" }, {}],
+        client.connection.sendRequest<{
-    })
-
-    expect(response).toEqual([{ beta: 1 }, 1, null, initialization])
-
-    await client.shutdown()
-  })
-
-  test("sends ranged didChange for incremental sync servers", async () => {
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.ts")
-    await Bun.write(file, "first\n")
-
-    await withTestInstance({
-      directory: tmp.path,
-      fn: async (ctx) => {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        await client.notify.open({ path: file })
-        await Bun.write(file, "second\nthird\n")
-        await client.notify.open({ path: file })
-
-        const change = await client.connection.sendRequest<{
           textDocument: { version: number }
           contentChanges: {
             range?: { start: { line: number; character: number }; end: { line: number; character: number } }
             text: string
           }[]
-        }>("test/get-last-change", {})
+        }>("test/get-last-change", {}),
-        expect(change.textDocument.version).toBe(1)
+      )
-        expect(change.contentChanges).toEqual([
+      expect(change.textDocument.version).toBe(1)
-          {
+      expect(change.contentChanges).toEqual([
-            range: {
+        {
-              start: { line: 0, character: 0 },
+          range: {
-              end: { line: 1, character: 0 },
+            start: { line: 0, character: 0 },
-            },
+            end: { line: 1, character: 0 },
-            text: "second\nthird\n",
           },
-        ])
+          text: "second\nthird\n",
+        },
+      ])
+    }),
+  )
 
-        await client.shutdown()
+  it.instance("document mode falls back to push diagnostics", () =>
-      },
+    Effect.gen(function* () {
-    })
+      const test = yield* TestInstance
-  })
+      const file = path.join(test.directory, "client.ts")
+      yield* writeFile(file, "const x = 1\n")
 
-  test("document mode falls back to push diagnostics", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.ts")
-    await Bun.write(file, "const x = 1\n")
 
-    await withTestInstance({
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-      directory: tmp.path,
+      const wait = client.waitForDiagnostics({ path: file, version, mode: "document" })
-      fn: async (ctx) => {
+      yield* Effect.promise(() =>
-        const client = await LSPClient.create({
+        client.connection.sendNotification("test/publish-diagnostics", {
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        const version = await client.notify.open({ path: file })
-        const wait = client.waitForDiagnostics({ path: file, version, mode: "document" })
-        await client.connection.sendNotification("test/publish-diagnostics", {
           uri: pathToFileURL(file).href,
           version,
           diagnostics: [
@@ -224,40 +191,30 @@ describe("LSPClient interop", () => {
               severity: 1,
             },
           ],
-        })
+        }),
-        await wait
+      )
+      yield* Effect.promise(() => wait)
 
-        const diagnostics = client.diagnostics.get(file) ?? []
+      const diagnostics = client.diagnostics.get(file) ?? []
-        expect(diagnostics).toHaveLength(1)
+      expect(diagnostics).toHaveLength(1)
-        expect(diagnostics[0]?.message).toBe("push diagnostic")
+      expect(diagnostics[0]?.message).toBe("push diagnostic")
 
-        const count = await client.connection.sendRequest("test/get-diagnostic-request-count", {})
+      const count = yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {}))
-        expect(count).toBe(0)
+      expect(count).toBe(0)
+    }),
+  )
 
-        await client.shutdown()
+  it.instance("document mode accepts matching push diagnostics published before waiting", () =>
-      },
+    Effect.gen(function* () {
-    })
+      const test = yield* TestInstance
-  })
+      const file = path.join(test.directory, "client.ts")
+      yield* writeFile(file, "const x = 1\n")
 
-  test("document mode accepts matching push diagnostics published before waiting", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.ts")
-    await Bun.write(file, "const x = 1\n")
 
-    await withTestInstance({
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-      directory: tmp.path,
+      yield* Effect.promise(() =>
-      fn: async (ctx) => {
+        client.connection.sendNotification("test/publish-diagnostics", {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        const version = await client.notify.open({ path: file })
-        await client.connection.sendNotification("test/publish-diagnostics", {
           uri: pathToFileURL(file).href,
           version,
           diagnostics: [
@@ -270,41 +227,31 @@ describe("LSPClient interop", () => {
               severity: 1,
             },
           ],
-        })
+        }),
+      )
 
-        for (let i = 0; i < 20 && (client.diagnostics.get(file)?.length ?? 0) === 0; i++) {
+      const diagnostic = yield* pollWithTimeout(
-          await new Promise((resolve) => setTimeout(resolve, 25))
+        Effect.sync(() => client.diagnostics.get(file)?.[0]),
-        }
+        "push diagnostic was not published",
+      )
+      expect(diagnostic.message).toBe("push diagnostic")
 
-        expect(client.diagnostics.get(file)?.[0]?.message).toBe("push diagnostic")
+      const started = Date.now()
+      yield* Effect.promise(() => client.waitForDiagnostics({ path: file, version, mode: "document" }))
+      expect(Date.now() - started).toBeLessThan(1_000)
+    }),
+  )
 
-        const started = Date.now()
+  it.instance("document mode waits for pull diagnostics", () =>
-        await client.waitForDiagnostics({ path: file, version, mode: "document" })
+    Effect.gen(function* () {
-        expect(Date.now() - started).toBeLessThan(1_000)
+      const test = yield* TestInstance
+      const file = path.join(test.directory, "client.cs")
+      yield* writeFile(file, "class C {}\n")
 
-        await client.shutdown()
+      const client = yield* createScopedClient(spawnFakeServer())
-      },
-    })
-  })
 
-  test("document mode waits for pull diagnostics", async () => {
+      yield* Effect.promise(() =>
-    const handle = spawnFakeServer() as any
+        client.connection.sendRequest("test/configure-pull-diagnostics", {
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.cs")
-    await Bun.write(file, "class C {}\n")
-
-    await withTestInstance({
-      directory: tmp.path,
-      fn: async (ctx) => {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        await client.connection.sendRequest("test/configure-pull-diagnostics", {
           registerOn: "didOpen",
           registrations: [{ identifier: "DocumentCompilerSemantic" }],
           documentDiagnosticsByIdentifier: {
@@ -319,41 +266,31 @@ describe("LSPClient interop", () => {
               },
             ],
           },
-        })
+        }),
+      )
 
-        const version = await client.notify.open({ path: file })
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-        await client.waitForDiagnostics({ path: file, version, mode: "document" })
+      yield* Effect.promise(() => client.waitForDiagnostics({ path: file, version, mode: "document" }))
 
-        const diagnostics = client.diagnostics.get(file) ?? []
+      const diagnostics = client.diagnostics.get(file) ?? []
-        expect(diagnostics).toHaveLength(1)
+      expect(diagnostics).toHaveLength(1)
-        expect(diagnostics[0]?.message).toBe("pull diagnostic")
+      expect(diagnostics[0]?.message).toBe("pull diagnostic")
 
-        const count = await client.connection.sendRequest("test/get-diagnostic-request-count", {})
+      const count = yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {}))
-        expect(count).toBeGreaterThan(0)
+      expect(count).toBeGreaterThan(0)
+    }),
+  )
 
-        await client.shutdown()
+  it.instance("document mode does not wait for the slowest pull identifier after current-file diagnostics arrive", () =>
-      },
+    Effect.gen(function* () {
-    })
+      const test = yield* TestInstance
-  })
+      const file = path.join(test.directory, "client.cs")
+      yield* writeFile(file, "class C {}\n")
 
-  test("document mode does not wait for the slowest pull identifier after current-file diagnostics arrive", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.cs")
-    await Bun.write(file, "class C {}\n")
 
-    await withTestInstance({
+      yield* Effect.promise(() =>
-      directory: tmp.path,
+        client.connection.sendRequest("test/configure-pull-diagnostics", {
-      fn: async (ctx) => {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        await client.connection.sendRequest("test/configure-pull-diagnostics", {
           registrations: [{ identifier: "fast" }, { identifier: "slow" }],
           documentDiagnosticsByIdentifier: {
             fast: [
@@ -371,43 +308,34 @@ describe("LSPClient interop", () => {
           documentDelayMsByIdentifier: {
             slow: 2_500,
           },
-        })
+        }),
+      )
 
-        const version = await client.notify.open({ path: file })
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-        await client.connection.sendRequest("test/register-configured-pull-diagnostics", {})
+      yield* Effect.promise(() => client.connection.sendRequest("test/register-configured-pull-diagnostics", {}))
-        await new Promise((resolve) => setTimeout(resolve, 100))
+      const started = Date.now()
-        const started = Date.now()
+      yield* Effect.promise(() => client.waitForDiagnostics({ path: file, version, mode: "document" }))
-        await client.waitForDiagnostics({ path: file, version, mode: "document" })
 
-        expect(Date.now() - started).toBeLessThan(1_000)
+      expect(Date.now() - started).toBeLessThan(1_000)
-        expect(client.diagnostics.get(file)?.[0]?.message).toBe("fast diagnostic")
+      expect(client.diagnostics.get(file)?.[0]?.message).toBe("fast diagnostic")
-        expect(await client.connection.sendRequest("test/get-diagnostic-request-count", {})).toBeGreaterThan(1)
+      expect(
+        yield* Effect.promise(() => client.connection.sendRequest("test/get-diagnostic-request-count", {})),
+      ).toBeGreaterThan(1)
+    }),
+  )
 
-        await client.shutdown()
+  it.instance("full mode includes workspace pull diagnostics", () =>
-      },
+    Effect.gen(function* () {
-    })
+      const test = yield* TestInstance
-  })
+      const file = path.join(test.directory, "client.cs")
+      const related = path.join(test.directory, "other.cs")
+      yield* writeFile(file, "class C {}\n")
+      yield* writeFile(related, "class D {}\n")
 
-  test("full mode includes workspace pull diagnostics", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.cs")
-    const related = path.join(tmp.path, "other.cs")
-    await Bun.write(file, "class C {}\n")
-    await Bun.write(related, "class D {}\n")
 
-    await withTestInstance({
+      yield* Effect.promise(() =>
-      directory: tmp.path,
+        client.connection.sendRequest("test/configure-pull-diagnostics", {
-      fn: async (ctx) => {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        await client.connection.sendRequest("test/configure-pull-diagnostics", {
           registerOn: "didOpen",
           registrations: [
             { identifier: "DocumentCompilerSemantic" },
@@ -442,52 +370,40 @@ describe("LSPClient interop", () => {
               },
             ],
           },
-        })
+        }),
+      )
 
-        const version = await client.notify.open({ path: file })
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-        await client.waitForDiagnostics({ path: file, version, mode: "full" })
+      yield* Effect.promise(() => client.waitForDiagnostics({ path: file, version, mode: "full" }))
 
-        expect(client.diagnostics.get(file)?.[0]?.message).toBe("current file")
+      expect(client.diagnostics.get(file)?.[0]?.message).toBe("current file")
-        expect(client.diagnostics.get(related)?.[0]?.message).toBe("workspace file")
+      expect(client.diagnostics.get(related)?.[0]?.message).toBe("workspace file")
+    }),
+  )
 
-        await client.shutdown()
+  it.instance("full mode treats an empty workspace pull response as handled", () =>
-      },
+    Effect.gen(function* () {
-    })
+      const test = yield* TestInstance
-  })
+      const file = path.join(test.directory, "client.cs")
+      yield* writeFile(file, "class C {}\n")
 
-  test("full mode treats an empty workspace pull response as handled", async () => {
+      const client = yield* createScopedClient(spawnFakeServer())
-    const handle = spawnFakeServer() as any
-    await using tmp = await tmpdir()
-    const file = path.join(tmp.path, "client.cs")
-    await Bun.write(file, "class C {}\n")
 
-    await withTestInstance({
+      yield* Effect.promise(() =>
-      directory: tmp.path,
+        client.connection.sendRequest("test/configure-pull-diagnostics", {
-      fn: async (ctx) => {
-        const client = await LSPClient.create({
-          serverID: "fake",
-          server: handle as unknown as LSPServer.Handle,
-          root: tmp.path,
-          directory: tmp.path,
-          instance: ctx,
-        })
-
-        await client.connection.sendRequest("test/configure-pull-diagnostics", {
           registerOn: "didOpen",
           registrations: [{ identifier: "WorkspaceDocumentsAndProject", workspaceDiagnostics: true }],
           workspaceDiagnosticsByIdentifier: {
             WorkspaceDocumentsAndProject: [],
           },
-        })
+        }),
+      )
 
-        const version = await client.notify.open({ path: file })
+      const version = yield* Effect.promise(() => client.notify.open({ path: file }))
-        const started = Date.now()
+      const started = Date.now()
-        await client.waitForDiagnostics({ path: file, version, mode: "full" })
+      yield* Effect.promise(() => client.waitForDiagnostics({ path: file, version, mode: "full" }))
 
-        expect(Date.now() - started).toBeLessThan(1_000)
+      expect(Date.now() - started).toBeLessThan(1_000)
-
+    }),
-        await client.shutdown()
+  )
-      },
-    })
-  })
 })

packages/opencode/test/project/project.test.ts

@@ -30,16 +30,9 @@ void Log.init({ print: false })
 
 const encoder = new TextEncoder()
 
-const layer = Layer.mergeAll(Project.defaultLayer, CrossSpawnSpawner.defaultLayer)
+const layer = Layer.mergeAll(Project.defaultLayer, CrossSpawnSpawner.defaultLayer, AppFileSystem.defaultLayer)
 const it = testEffect(layer)
 
-function run<A, E>(fn: (svc: Project.Interface) => Effect.Effect<A, E>) {
-  return Effect.gen(function* () {
-    const svc = yield* Project.Service
-    return yield* fn(svc)
-  })
-}
-
 function remoteProjectID(remote: string) {
   return ProjectID.make(Hash.fast(`git-remote:${remote}`))
 }
@@ -103,10 +96,18 @@ function projectLayerWithRuntimeFlags(flags: Parameters<typeof RuntimeFlags.laye
 }
 
 const failureIt = (failArg: string) =>
-  testEffect(Layer.mergeAll(projectLayerWithFailure(failArg), CrossSpawnSpawner.defaultLayer))
+  testEffect(
+    Layer.mergeAll(projectLayerWithFailure(failArg), CrossSpawnSpawner.defaultLayer, AppFileSystem.defaultLayer),
+  )
 
 const iconDiscoveryIt = testEffect(
-  Layer.provideMerge(projectLayerWithRuntimeFlags({ experimentalIconDiscovery: true }), CrossSpawnSpawner.defaultLayer),
+  Layer.mergeAll(
+    Layer.provideMerge(
+      projectLayerWithRuntimeFlags({ experimentalIconDiscovery: true }),
+      CrossSpawnSpawner.defaultLayer,
+    ),
+    AppFileSystem.defaultLayer,
+  ),
 )
 
 function waitForProjectIcon(id: ProjectID, attempts = 50): Effect.Effect<Project.Info> {
@@ -125,7 +126,7 @@ describe("Project.fromDirectory", () => {
       const tmp = yield* tmpdirScoped()
       yield* Effect.promise(() => $`git init`.cwd(tmp).quiet())
 
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       expect(project).toBeDefined()
       expect(project.id).toBe(ProjectID.global)
@@ -133,7 +134,7 @@ describe("Project.fromDirectory", () => {
       expect(project.worktree).toBe(tmp)
 
       const opencodeFile = path.join(tmp, ".git", "opencode")
-      expect(yield* Effect.promise(() => Bun.file(opencodeFile).exists())).toBe(false)
+      expect(yield* AppFileSystem.use.existsSafe(opencodeFile)).toBe(false)
     }),
   )
 
@@ -141,7 +142,7 @@ describe("Project.fromDirectory", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
 
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       expect(project).toBeDefined()
       expect(project.id).not.toBe(ProjectID.global)
@@ -153,7 +154,7 @@ describe("Project.fromDirectory", () => {
   it.live("returns global for non-git directory", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped()
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
       expect(project.id).toBe(ProjectID.global)
     }),
   )
@@ -161,8 +162,8 @@ describe("Project.fromDirectory", () => {
   it.live("derives stable project ID from root commit", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project: a } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project: a } = yield* Project.use.fromDirectory(tmp)
-      const { project: b } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project: b } = yield* Project.use.fromDirectory(tmp)
       expect(b.id).toBe(a.id)
     }),
   )
@@ -172,7 +173,7 @@ describe("Project.fromDirectory", () => {
       const tmp = yield* tmpdirScoped({ git: true })
       yield* Effect.promise(() => $`git remote add origin git@github.com:Test-Org/Test-Repo.git`.cwd(tmp).quiet())
 
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       expect(project.id).toBe(remoteProjectID("github.com/Test-Org/Test-Repo"))
     }),
@@ -185,8 +186,8 @@ describe("Project.fromDirectory", () => {
       yield* Effect.promise(() => $`git remote add origin git@github.com:owner/repo.git`.cwd(ssh).quiet())
       yield* Effect.promise(() => $`git remote add origin https://github.com/owner/repo.git`.cwd(https).quiet())
 
-      const { project: a } = yield* run((svc) => svc.fromDirectory(ssh))
+      const { project: a } = yield* Project.use.fromDirectory(ssh)
-      const { project: b } = yield* run((svc) => svc.fromDirectory(https))
+      const { project: b } = yield* Project.use.fromDirectory(https)
 
       expect(a.id).toBe(remoteProjectID("github.com/owner/repo"))
       expect(b.id).toBe(a.id)
@@ -196,8 +197,7 @@ describe("Project.fromDirectory", () => {
   it.live("migrates cached root project data when origin becomes available", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const projects = yield* Project.Service
+      const { project: rootProject } = yield* Project.use.fromDirectory(tmp)
-      const { project: rootProject } = yield* projects.fromDirectory(tmp)
       const remoteID = remoteProjectID("github.com/acme/app")
       const sessionID = crypto.randomUUID() as SessionID
       const workspaceID = WorkspaceID.ascending()
@@ -236,7 +236,7 @@ describe("Project.fromDirectory", () => {
       })
       yield* Effect.promise(() => $`git remote add origin git@github.com:acme/app.git`.cwd(tmp).quiet())
 
-      const { project } = yield* projects.fromDirectory(tmp)
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       expect(project.id).toBe(remoteID)
       expect(
@@ -263,7 +263,7 @@ describe("Project.fromDirectory git failure paths", () => {
       yield* Effect.promise(() => $`git init`.cwd(tmp).quiet())
 
       // rev-list fails because HEAD doesn't exist yet: this is the natural scenario.
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
       expect(project.vcs).toBe("git")
       expect(project.id).toBe(ProjectID.global)
       expect(project.worktree).toBe(tmp)
@@ -274,7 +274,7 @@ describe("Project.fromDirectory git failure paths", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
 
-      const { project, sandbox } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project, sandbox } = yield* Project.use.fromDirectory(tmp)
       expect(project.worktree).toBe(tmp)
       expect(sandbox).toBe(tmp)
     }),
@@ -284,7 +284,7 @@ describe("Project.fromDirectory git failure paths", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
 
-      const { project, sandbox } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project, sandbox } = yield* Project.use.fromDirectory(tmp)
       expect(project.worktree).toBe(tmp)
       expect(sandbox).toBe(tmp)
     }),
@@ -296,7 +296,7 @@ describe("Project.fromDirectory with worktrees", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
 
-      const { project, sandbox } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project, sandbox } = yield* Project.use.fromDirectory(tmp)
 
       expect(project.worktree).toBe(tmp)
       expect(sandbox).toBe(tmp)
@@ -319,7 +319,7 @@ describe("Project.fromDirectory with worktrees", () => {
       )
       yield* Effect.promise(() => $`git worktree add ${worktreePath} -b test-branch-${Date.now()}`.cwd(tmp).quiet())
 
-      const { project, sandbox } = yield* run((svc) => svc.fromDirectory(worktreePath))
+      const { project, sandbox } = yield* Project.use.fromDirectory(worktreePath)
 
       expect(project.worktree).toBe(worktreePath)
       expect(sandbox).toBe(worktreePath)
@@ -332,7 +332,7 @@ describe("Project.fromDirectory with worktrees", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
 
-      const { project: main } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project: main } = yield* Project.use.fromDirectory(tmp)
 
       const worktreePath = path.join(tmp, "..", path.basename(tmp) + "-wt-shared")
       yield* Effect.addFinalizer(() =>
@@ -345,12 +345,12 @@ describe("Project.fromDirectory with worktrees", () => {
       )
       yield* Effect.promise(() => $`git worktree add ${worktreePath} -b shared-${Date.now()}`.cwd(tmp).quiet())
 
-      const { project: wt } = yield* run((svc) => svc.fromDirectory(worktreePath))
+      const { project: wt } = yield* Project.use.fromDirectory(worktreePath)
 
       expect(wt.id).toBe(main.id)
 
       const cache = path.join(tmp, ".git", "opencode")
-      const exists = yield* Effect.promise(() => Bun.file(cache).exists())
+      const exists = yield* AppFileSystem.use.existsSafe(cache)
       expect(exists).toBe(true)
     }),
   )
@@ -368,8 +368,8 @@ describe("Project.fromDirectory with worktrees", () => {
       yield* Effect.promise(() => $`git clone --bare ${tmp} ${bare}`.quiet())
       yield* Effect.promise(() => $`git clone ${bare} ${clone}`.quiet())
 
-      const { project: a } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project: a } = yield* Project.use.fromDirectory(tmp)
-      const { project: b } = yield* run((svc) => svc.fromDirectory(clone))
+      const { project: b } = yield* Project.use.fromDirectory(clone)
 
       expect(b.id).toBe(a.id)
     }),
@@ -400,8 +400,8 @@ describe("Project.fromDirectory with worktrees", () => {
       yield* Effect.promise(() => $`git worktree add ${worktree1} -b branch-${Date.now()}`.cwd(tmp).quiet())
       yield* Effect.promise(() => $`git worktree add ${worktree2} -b branch-${Date.now() + 1}`.cwd(tmp).quiet())
 
-      yield* run((svc) => svc.fromDirectory(worktree1))
+      yield* Project.use.fromDirectory(worktree1)
-      const { project } = yield* run((svc) => svc.fromDirectory(worktree2))
+      const { project } = yield* Project.use.fromDirectory(worktree2)
 
       expect(project.worktree).toBe(worktree1)
       expect(project.sandboxes).toContain(worktree2)
@@ -415,9 +415,9 @@ describe("Project.discover", () => {
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
       const pngData = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])
-      yield* Effect.promise(() => Bun.write(path.join(tmp, "favicon.png"), pngData))
+      yield* AppFileSystem.use.writeWithDirs(path.join(tmp, "favicon.png"), pngData)
 
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
       const updated = yield* waitForProjectIcon(project.id)
 
       expect(updated.icon?.url).toStartWith("data:")
@@ -428,12 +428,12 @@ describe("Project.discover", () => {
   it.live("should discover favicon.png in root", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       const pngData = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])
-      yield* Effect.promise(() => Bun.write(path.join(tmp, "favicon.png"), pngData))
+      yield* AppFileSystem.use.writeWithDirs(path.join(tmp, "favicon.png"), pngData)
 
-      yield* run((svc) => svc.discover(project))
+      yield* Project.use.discover(project)
 
       const updated = Project.get(project.id)
       expect(updated).toBeDefined()
@@ -447,11 +447,11 @@ describe("Project.discover", () => {
   it.live("should not discover non-image files", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      yield* Effect.promise(() => Bun.write(path.join(tmp, "favicon.txt"), "not an image"))
+      yield* AppFileSystem.use.writeWithDirs(path.join(tmp, "favicon.txt"), "not an image")
 
-      yield* run((svc) => svc.discover(project))
+      yield* Project.use.discover(project)
 
       const updated = Project.get(project.id)
       expect(updated).toBeDefined()
@@ -462,22 +462,20 @@ describe("Project.discover", () => {
   it.live("should not discover favicon when override is set", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      yield* run((svc) =>
+      yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        icon: { override: "data:image/png;base64,override" },
-          icon: { override: "data:image/png;base64,override" },
+      })
-        }),
-      )
 
-      const updatedProject = yield* run((svc) => svc.get(project.id))
+      const updatedProject = yield* Project.use.get(project.id)
       if (!updatedProject) throw new Error("Project not found")
 
       const pngData = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])
-      yield* Effect.promise(() => Bun.write(path.join(tmp, "favicon.png"), pngData))
+      yield* AppFileSystem.use.writeWithDirs(path.join(tmp, "favicon.png"), pngData)
 
-      yield* run((svc) => svc.discover(updatedProject))
+      yield* Project.use.discover(updatedProject)
 
       const updated = Project.get(project.id)
       expect(updated).toBeDefined()
@@ -491,14 +489,12 @@ describe("Project.update", () => {
   it.live("should update name", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        name: "New Project Name",
-          name: "New Project Name",
+      })
-        }),
-      )
 
       expect(updated.name).toBe("New Project Name")
 
@@ -510,14 +506,12 @@ describe("Project.update", () => {
   it.live("should update icon url", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        icon: { url: "https://example.com/icon.png" },
-          icon: { url: "https://example.com/icon.png" },
+      })
-        }),
-      )
 
       expect(updated.icon?.url).toBe("https://example.com/icon.png")
 
@@ -529,14 +523,12 @@ describe("Project.update", () => {
   it.live("should update icon color", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        icon: { color: "#ff0000" },
-          icon: { color: "#ff0000" },
+      })
-        }),
-      )
 
       expect(updated.icon?.color).toBe("#ff0000")
 
@@ -548,14 +540,12 @@ describe("Project.update", () => {
   it.live("should update icon override", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        icon: { override: "data:image/png;base64,abc123" },
-          icon: { override: "data:image/png;base64,abc123" },
+      })
-        }),
-      )
 
       expect(updated.icon?.override).toBe("data:image/png;base64,abc123")
 
@@ -567,14 +557,12 @@ describe("Project.update", () => {
   it.live("should update commands", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        commands: { start: "npm run dev" },
-          commands: { start: "npm run dev" },
+      })
-        }),
-      )
 
       expect(updated.commands?.start).toBe("npm run dev")
 
@@ -585,12 +573,12 @@ describe("Project.update", () => {
 
   it.live("should fail when project not found", () =>
     Effect.gen(function* () {
-      const exit = yield* run((svc) =>
+      const exit = yield* Project.use
-        svc.update({
+        .update({
           projectID: ProjectID.make("nonexistent-project-id"),
           name: "Should Fail",
-        }),
+        })
-      ).pipe(Effect.exit)
+        .pipe(Effect.exit)
       expect(Exit.isFailure(exit)).toBe(true)
       if (Exit.isFailure(exit)) {
         const error = Cause.squash(exit.cause)
@@ -602,7 +590,7 @@ describe("Project.update", () => {
   it.live("should emit GlobalBus event on update", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       let eventPayload: any = null
       const on = (data: any) => {
@@ -611,7 +599,7 @@ describe("Project.update", () => {
       GlobalBus.on("event", on)
       yield* Effect.addFinalizer(() => Effect.sync(() => GlobalBus.off("event", on)))
 
-      yield* run((svc) => svc.update({ projectID: project.id, name: "Updated Name" }))
+      yield* Project.use.update({ projectID: project.id, name: "Updated Name" })
 
       expect(eventPayload).not.toBeNull()
       expect(eventPayload.payload.type).toBe("project.updated")
@@ -622,16 +610,14 @@ describe("Project.update", () => {
   it.live("should update multiple fields at once", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
-      const updated = yield* run((svc) =>
+      const updated = yield* Project.use.update({
-        svc.update({
+        projectID: project.id,
-          projectID: project.id,
+        name: "Multi Update",
-          name: "Multi Update",
+        icon: { url: "https://example.com/favicon.ico", override: "data:image/png;base64,abc123", color: "#00ff00" },
-          icon: { url: "https://example.com/favicon.ico", override: "data:image/png;base64,abc123", color: "#00ff00" },
+        commands: { start: "make start" },
-          commands: { start: "make start" },
+      })
-        }),
-      )
 
       expect(updated.name).toBe("Multi Update")
       expect(updated.icon?.url).toBe("https://example.com/favicon.ico")
@@ -646,7 +632,7 @@ describe("Project.list and Project.get", () => {
   it.live("list returns all projects", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       const all = Project.list()
       expect(all.length).toBeGreaterThan(0)
@@ -657,7 +643,7 @@ describe("Project.list and Project.get", () => {
   it.live("get returns project by id", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       const found = Project.get(project.id)
       expect(found).toBeDefined()
@@ -675,7 +661,7 @@ describe("Project.setInitialized", () => {
   it.live("sets time_initialized on project", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
 
       expect(project.time.initialized).toBeUndefined()
 
@@ -691,15 +677,15 @@ describe("Project.addSandbox and Project.removeSandbox", () => {
   it.live("addSandbox adds directory and removeSandbox removes it", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
       const sandboxDir = path.join(tmp, "sandbox-test")
 
-      yield* run((svc) => svc.addSandbox(project.id, sandboxDir))
+      yield* Project.use.addSandbox(project.id, sandboxDir)
 
       let found = Project.get(project.id)
       expect(found?.sandboxes).toContain(sandboxDir)
 
-      yield* run((svc) => svc.removeSandbox(project.id, sandboxDir))
+      yield* Project.use.removeSandbox(project.id, sandboxDir)
 
       found = Project.get(project.id)
       expect(found?.sandboxes).not.toContain(sandboxDir)
@@ -709,7 +695,7 @@ describe("Project.addSandbox and Project.removeSandbox", () => {
   it.live("addSandbox emits GlobalBus event", () =>
     Effect.gen(function* () {
       const tmp = yield* tmpdirScoped({ git: true })
-      const { project } = yield* run((svc) => svc.fromDirectory(tmp))
+      const { project } = yield* Project.use.fromDirectory(tmp)
       const sandboxDir = path.join(tmp, "sandbox-event")
 
       const events: any[] = []
@@ -717,7 +703,7 @@ describe("Project.addSandbox and Project.removeSandbox", () => {
       GlobalBus.on("event", on)
       yield* Effect.addFinalizer(() => Effect.sync(() => GlobalBus.off("event", on)))
 
-      yield* run((svc) => svc.addSandbox(project.id, sandboxDir))
+      yield* Project.use.addSandbox(project.id, sandboxDir)
 
       expect(events.some((e) => e.payload.type === Project.Event.Updated.type)).toBe(true)
     }),
@@ -739,7 +725,7 @@ describe("Project.fromDirectory with bare repos", () => {
       yield* Effect.promise(() => $`git clone --bare ${tmp} ${barePath}`.quiet())
       yield* Effect.promise(() => $`git worktree add ${worktreePath} HEAD`.cwd(barePath).quiet())
 
-      const { project } = yield* run((svc) => svc.fromDirectory(worktreePath))
+      const { project } = yield* Project.use.fromDirectory(worktreePath)
 
       expect(project.id).not.toBe(ProjectID.global)
       expect(project.worktree).toBe(worktreePath)
@@ -747,8 +733,8 @@ describe("Project.fromDirectory with bare repos", () => {
       const correctCache = path.join(barePath, "opencode")
       const wrongCache = path.join(parentDir, ".git", "opencode")
 
-      expect(yield* Effect.promise(() => Bun.file(correctCache).exists())).toBe(true)
+      expect(yield* AppFileSystem.use.existsSafe(correctCache)).toBe(true)
-      expect(yield* Effect.promise(() => Bun.file(wrongCache).exists())).toBe(false)
+      expect(yield* AppFileSystem.use.existsSafe(wrongCache)).toBe(false)
     }),
   )
 
@@ -773,8 +759,8 @@ describe("Project.fromDirectory with bare repos", () => {
       yield* Effect.promise(() => $`git worktree add ${worktreeA} HEAD`.cwd(bareA).quiet())
       yield* Effect.promise(() => $`git worktree add ${worktreeB} HEAD`.cwd(bareB).quiet())
 
-      const { project: projA } = yield* run((svc) => svc.fromDirectory(worktreeA))
+      const { project: projA } = yield* Project.use.fromDirectory(worktreeA)
-      const { project: projB } = yield* run((svc) => svc.fromDirectory(worktreeB))
+      const { project: projB } = yield* Project.use.fromDirectory(worktreeB)
 
       expect(projA.id).not.toBe(projB.id)
 
@@ -782,9 +768,9 @@ describe("Project.fromDirectory with bare repos", () => {
       const cacheB = path.join(bareB, "opencode")
       const wrongCache = path.join(parentDir, ".git", "opencode")
 
-      expect(yield* Effect.promise(() => Bun.file(cacheA).exists())).toBe(true)
+      expect(yield* AppFileSystem.use.existsSafe(cacheA)).toBe(true)
-      expect(yield* Effect.promise(() => Bun.file(cacheB).exists())).toBe(true)
+      expect(yield* AppFileSystem.use.existsSafe(cacheB)).toBe(true)
-      expect(yield* Effect.promise(() => Bun.file(wrongCache).exists())).toBe(false)
+      expect(yield* AppFileSystem.use.existsSafe(wrongCache)).toBe(false)
     }),
   )
 
@@ -802,13 +788,13 @@ describe("Project.fromDirectory with bare repos", () => {
       yield* Effect.promise(() => $`git clone --bare ${tmp} ${barePath}`.quiet())
       yield* Effect.promise(() => $`git worktree add ${worktreePath} HEAD`.cwd(barePath).quiet())
 
-      const { project } = yield* run((svc) => svc.fromDirectory(worktreePath))
+      const { project } = yield* Project.use.fromDirectory(worktreePath)
 
       expect(project.id).not.toBe(ProjectID.global)
       expect(project.worktree).toBe(worktreePath)
 
       const correctCache = path.join(barePath, "opencode")
-      expect(yield* Effect.promise(() => Bun.file(correctCache).exists())).toBe(true)
+      expect(yield* AppFileSystem.use.existsSafe(correctCache)).toBe(true)
     }),
   )
 })

packages/opencode/test/session/llm-native.test.ts

@@ -6,7 +6,6 @@ import { Effect, Layer, Stream } from "effect"
 import { LLMNative } from "@/session/llm/native-request"
 import { LLMNativeRuntime } from "@/session/llm/native-runtime"
 import type { Provider } from "@/provider/provider"
-import { ProviderTransform } from "@/provider/transform"
 import { ModelID, ProviderID } from "@/provider/schema"
 import { OAUTH_DUMMY_KEY } from "@/auth"
 import { testEffect } from "../lib/effect"
@@ -71,21 +70,6 @@ const providerInfo: Provider.Info = {
   models: {},
 }
 
-const compatibleModel: Provider.Model = {
-  ...baseModel,
-  id: ModelID.make("deepseek-v4-flash-free"),
-  providerID: ProviderID.make("opencode"),
-  api: {
-    id: "deepseek-v4-flash-free",
-    url: "https://ai.example.test/v1",
-    npm: "@ai-sdk/openai-compatible",
-  },
-  capabilities: {
-    ...baseModel.capabilities,
-    interleaved: { field: "reasoning_content" },
-  },
-}
-
 const it = testEffect(
   LLMClient.layer.pipe(Layer.provide(Layer.mergeAll(RequestExecutor.defaultLayer, WebSocketExecutor.layer))),
 )
@@ -342,70 +326,6 @@ describe("session.llm-native.request", () => {
     ])
   })
 
-  it.effect("preserves OpenAI-compatible reasoning continuation and provider options", () =>
-    Effect.gen(function* () {
-      const messages = ProviderTransform.message(
-        [
-          { role: "user", content: "Audit the site" },
-          {
-            role: "assistant",
-            content: [
-              { type: "reasoning", text: "I should inspect the page." },
-              {
-                type: "tool-call",
-                toolCallId: "call-1",
-                toolName: "devtools_new_page",
-                input: { url: "https://example.test" },
-              },
-            ],
-          },
-        ] as ModelMessage[],
-        compatibleModel,
-        {},
-      )
-
-      const prepared = yield* LLMClient.prepare(
-        LLMNative.request({
-          model: compatibleModel,
-          apiKey: "test-key",
-          messages,
-          providerOptions: ProviderTransform.providerOptions(compatibleModel, {
-            reasoningEffort: "max",
-            textVerbosity: "low",
-            promptCacheKey: "session-1",
-            enable_thinking: true,
-          }),
-        }),
-      )
-
-      expect(prepared.body).toMatchObject({
-        model: "deepseek-v4-flash-free",
-        reasoning_effort: "max",
-        verbosity: "low",
-        prompt_cache_key: "session-1",
-        enable_thinking: true,
-        messages: [
-          { role: "user", content: "Audit the site" },
-          {
-            role: "assistant",
-            content: null,
-            reasoning_content: "I should inspect the page.",
-            tool_calls: [
-              {
-                id: "call-1",
-                type: "function",
-                function: {
-                  name: "devtools_new_page",
-                  arguments: '{"url":"https://example.test"}',
-                },
-              },
-            ],
-          },
-        ],
-      })
-    }),
-  )
-
   test("selects native request routes for provider packages", () => {
     const openai = LLMNative.model({
       model: { ...baseModel, api: { ...baseModel.api, url: "", npm: "@ai-sdk/openai" } },

packages/opencode/test/skill/skill.test.ts

@@ -8,14 +8,13 @@ import { Config } from "../../src/config/config"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Global } from "@opencode-ai/core/global"
-import { provideInstance, provideTmpdirInstance, tmpdir } from "../fixture/fixture"
+import { TestInstance } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
 import path from "path"
-import fs from "fs/promises"
 
 const node = CrossSpawnSpawner.defaultLayer
 
-const it = testEffect(Layer.mergeAll(Skill.defaultLayer, node))
+const it = testEffect(Layer.mergeAll(Skill.defaultLayer, AppFileSystem.defaultLayer, node))
 const itWithoutClaudeCodeSkills = testEffect(
   Layer.mergeAll(
     Skill.layer.pipe(
@@ -26,6 +25,7 @@ const itWithoutClaudeCodeSkills = testEffect(
       Layer.provide(Global.layer),
       Layer.provide(RuntimeFlags.layer({ disableClaudeCodeSkills: true })),
     ),
+    AppFileSystem.defaultLayer,
     node,
   ),
 )
@@ -39,15 +39,18 @@ const itWithoutExternalSkills = testEffect(
       Layer.provide(Global.layer),
       Layer.provide(RuntimeFlags.layer({ disableExternalSkills: true })),
     ),
+    AppFileSystem.defaultLayer,
     node,
   ),
 )
 
-async function createGlobalSkill(homeDir: string) {
+const writeSkill = (dir: string, parts: string[], content: string) =>
-  const skillDir = path.join(homeDir, ".claude", "skills", "global-test-skill")
+  AppFileSystem.use.writeWithDirs(path.join(dir, ...parts, "SKILL.md"), content)
-  await fs.mkdir(skillDir, { recursive: true })
+
-  await Bun.write(
+const createGlobalSkill = (homeDir: string) =>
-    path.join(skillDir, "SKILL.md"),
+  writeSkill(
+    homeDir,
+    [".claude", "skills", "global-test-skill"],
     `---
 name: global-test-skill
 description: A global skill from ~/.claude/skills for testing.
@@ -58,7 +61,6 @@ description: A global skill from ~/.claude/skills for testing.
 This skill is loaded from the global home directory.
 `,
   )
-}
 
 const withHome = <A, E, R>(home: string, self: Effect.Effect<A, E, R>) =>
   Effect.acquireUseRelease(
@@ -75,14 +77,14 @@ const withHome = <A, E, R>(home: string, self: Effect.Effect<A, E, R>) =>
   )
 
 describe("skill", () => {
-  it.live("discovers skills from .opencode/skill/ directory", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers skills from .opencode/skill/ directory",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* writeSkill(
-            Bun.write(
+        test.directory,
-              path.join(dir, ".opencode", "skill", "test-skill", "SKILL.md"),
+        [".opencode", "skill", "test-skill"],
-              `---
+        `---
 name: test-skill
 description: A test skill for verification.
 ---
@@ -91,118 +93,111 @@ description: A test skill for verification.
 
 Instructions here.
 `,
-            ),
+      )
-          )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(1)
-          expect(list.length).toBe(1)
+      const item = list.find((x) => x.name === "test-skill")
-          const item = list.find((x) => x.name === "test-skill")
+      expect(item).toBeDefined()
-          expect(item).toBeDefined()
+      expect(item!.description).toBe("A test skill for verification.")
-          expect(item!.description).toBe("A test skill for verification.")
+      expect(item!.location).toContain(path.join("skill", "test-skill", "SKILL.md"))
-          expect(item!.location).toContain(path.join("skill", "test-skill", "SKILL.md"))
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  it.live("returns skill directories from Skill.dirs", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "returns skill directories from Skill.dirs",
-      (dir) =>
+    Effect.gen(function* () {
-        withHome(
+      const test = yield* TestInstance
-          dir,
+      yield* withHome(
-          Effect.gen(function* () {
+        test.directory,
-            yield* Effect.promise(() =>
+        Effect.gen(function* () {
-              Bun.write(
+          yield* writeSkill(
-                path.join(dir, ".opencode", "skill", "dir-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skill", "dir-skill"],
+            `---
 name: dir-skill
 description: Skill for dirs test.
 ---
 
 # Dir Skill
 `,
-              ),
+          )
-            )
 
-            const skill = yield* Skill.Service
+          const dirs = yield* Skill.use.dirs()
-            const dirs = yield* skill.dirs()
+          expect(dirs).toContain(path.join(test.directory, ".opencode", "skill", "dir-skill"))
-            expect(dirs).toContain(path.join(dir, ".opencode", "skill", "dir-skill"))
+          expect(dirs.length).toBe(1)
-            expect(dirs.length).toBe(1)
+        }),
-          }),
+      )
-        ),
+    }),
-      { git: true },
+    { git: true },
-    ),
   )
 
-  it.live("discovers multiple skills from .opencode/skill/ directory", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers multiple skills from .opencode/skill/ directory",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* Effect.all(
-            Promise.all([
+        [
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".opencode", "skill", "skill-one", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skill", "skill-one"],
+            `---
 name: skill-one
 description: First test skill.
 ---
 
 # Skill One
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".opencode", "skill", "skill-two", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skill", "skill-two"],
+            `---
 name: skill-two
 description: Second test skill.
 ---
 
 # Skill Two
 `,
-              ),
+          ),
-            ]),
+        ],
-          )
+      )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(2)
-          expect(list.length).toBe(2)
+      expect(list.find((x) => x.name === "skill-one")).toBeDefined()
-          expect(list.find((x) => x.name === "skill-one")).toBeDefined()
+      expect(list.find((x) => x.name === "skill-two")).toBeDefined()
-          expect(list.find((x) => x.name === "skill-two")).toBeDefined()
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  it.live("skips skills with missing frontmatter", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "skips skills with missing frontmatter",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* writeSkill(
-            Bun.write(
+        test.directory,
-              path.join(dir, ".opencode", "skill", "no-frontmatter", "SKILL.md"),
+        [".opencode", "skill", "no-frontmatter"],
-              `# No Frontmatter
+        `# No Frontmatter
 
 Just some content without YAML frontmatter.
 `,
-            ),
+      )
-          )
 
-          const skill = yield* Skill.Service
+      expect((yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")).toEqual([])
-          expect((yield* skill.all()).filter((s) => s.location !== "<built-in>")).toEqual([])
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  it.live("discovers skills without descriptions", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers skills without descriptions",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* writeSkill(
-            Bun.write(
+        test.directory,
-              path.join(dir, ".opencode", "skill", "manual-skill", "SKILL.md"),
+        [".opencode", "skill", "manual-skill"],
-              `---
+        `---
 name: manual-skill
 ---
 
@@ -210,98 +205,81 @@ name: manual-skill
 
 Instructions here.
 `,
-            ),
+      )
-          )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(1)
-          expect(list.length).toBe(1)
+      const item = list.find((x) => x.name === "manual-skill")
-          const item = list.find((x) => x.name === "manual-skill")
+      expect(item).toBeDefined()
-          expect(item).toBeDefined()
+      expect(item!.description).toBeUndefined()
-          expect(item!.description).toBeUndefined()
+      expect(Skill.fmt(list, { verbose: false })).toBe("No skills are currently available.")
-          expect(Skill.fmt(list, { verbose: false })).toBe("No skills are currently available.")
+      expect(Skill.fmt(list, { verbose: true })).toBe("No skills are currently available.")
-          expect(Skill.fmt(list, { verbose: true })).toBe("No skills are currently available.")
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  it.live("discovers skills from .claude/skills/ directory", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers skills from .claude/skills/ directory",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* writeSkill(
-            Bun.write(
+        test.directory,
-              path.join(dir, ".claude", "skills", "claude-skill", "SKILL.md"),
+        [".claude", "skills", "claude-skill"],
-              `---
+        `---
 name: claude-skill
 description: A skill in the .claude/skills directory.
 ---
 
 # Claude Skill
 `,
-            ),
-          )
-
-          const skill = yield* Skill.Service
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
-          expect(list.length).toBe(1)
-          const item = list.find((x) => x.name === "claude-skill")
-          expect(item).toBeDefined()
-          expect(item!.location).toContain(path.join(".claude", "skills", "claude-skill", "SKILL.md"))
-        }),
-      { git: true },
-    ),
-  )
-
-  it.live("discovers global skills from ~/.claude/skills/ directory", () =>
-    Effect.gen(function* () {
-      const tmp = yield* Effect.acquireRelease(
-        Effect.promise(() => tmpdir({ git: true })),
-        (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
       )
 
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(1)
+      const item = list.find((x) => x.name === "claude-skill")
+      expect(item).toBeDefined()
+      expect(item!.location).toContain(path.join(".claude", "skills", "claude-skill", "SKILL.md"))
+    }),
+    { git: true },
+  )
+
+  it.instance(
+    "discovers global skills from ~/.claude/skills/ directory",
+    Effect.gen(function* () {
+      const test = yield* TestInstance
       yield* withHome(
-        tmp.path,
+        test.directory,
         Effect.gen(function* () {
-          yield* Effect.promise(() => createGlobalSkill(tmp.path))
+          yield* createGlobalSkill(test.directory)
-          yield* Effect.gen(function* () {
+          const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-            const skill = yield* Skill.Service
+          expect(list.length).toBe(1)
-            const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+          expect(list[0].name).toBe("global-test-skill")
-            expect(list.length).toBe(1)
+          expect(list[0].description).toBe("A global skill from ~/.claude/skills for testing.")
-            expect(list[0].name).toBe("global-test-skill")
+          expect(list[0].location).toContain(path.join(".claude", "skills", "global-test-skill", "SKILL.md"))
-            expect(list[0].description).toBe("A global skill from ~/.claude/skills for testing.")
-            expect(list[0].location).toContain(path.join(".claude", "skills", "global-test-skill", "SKILL.md"))
-          }).pipe(provideInstance(tmp.path))
         }),
       )
     }),
+    { git: true },
   )
 
-  it.live("returns empty array when no skills exist", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "returns empty array when no skills exist",
-      () =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      expect((yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")).toEqual([])
-          const skill = yield* Skill.Service
+    }),
-          expect((yield* skill.all()).filter((s) => s.location !== "<built-in>")).toEqual([])
+    { git: true },
-        }),
-      { git: true },
-    ),
   )
 
-  it.live("fails with typed error when requiring a missing skill", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "fails with typed error when requiring a missing skill",
-      () =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const error = yield* Effect.flip(Skill.use.require("missing-skill"))
-          const skill = yield* Skill.Service
+      expect(error).toBeInstanceOf(Skill.NotFoundError)
-          const error = yield* Effect.flip(skill.require("missing-skill"))
+      expect(error._tag).toBe("Skill.NotFoundError")
-          expect(error).toBeInstanceOf(Skill.NotFoundError)
+      expect(error.name).toBe("missing-skill")
-          expect(error._tag).toBe("Skill.NotFoundError")
+      expect(error.message).toContain('Skill "missing-skill" not found.')
-          expect(error.name).toBe("missing-skill")
+    }),
-          expect(error.message).toContain('Skill "missing-skill" not found.')
+    { git: true },
-        }),
-      { git: true },
-    ),
   )
 
   it.effect("exposes tagged expected skill failure classes", () =>
@@ -320,50 +298,42 @@ description: A skill in the .claude/skills directory.
     }),
   )
 
-  it.live("discovers skills from .agents/skills/ directory", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers skills from .agents/skills/ directory",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* writeSkill(
-            Bun.write(
+        test.directory,
-              path.join(dir, ".agents", "skills", "agent-skill", "SKILL.md"),
+        [".agents", "skills", "agent-skill"],
-              `---
+        `---
 name: agent-skill
 description: A skill in the .agents/skills directory.
 ---
 
 # Agent Skill
 `,
-            ),
-          )
-
-          const skill = yield* Skill.Service
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
-          expect(list.length).toBe(1)
-          const item = list.find((x) => x.name === "agent-skill")
-          expect(item).toBeDefined()
-          expect(item!.location).toContain(path.join(".agents", "skills", "agent-skill", "SKILL.md"))
-        }),
-      { git: true },
-    ),
-  )
-
-  it.live("discovers global skills from ~/.agents/skills/ directory", () =>
-    Effect.gen(function* () {
-      const tmp = yield* Effect.acquireRelease(
-        Effect.promise(() => tmpdir({ git: true })),
-        (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
       )
 
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(1)
+      const item = list.find((x) => x.name === "agent-skill")
+      expect(item).toBeDefined()
+      expect(item!.location).toContain(path.join(".agents", "skills", "agent-skill", "SKILL.md"))
+    }),
+    { git: true },
+  )
+
+  it.instance(
+    "discovers global skills from ~/.agents/skills/ directory",
+    Effect.gen(function* () {
+      const test = yield* TestInstance
       yield* withHome(
-        tmp.path,
+        test.directory,
         Effect.gen(function* () {
-          const skillDir = path.join(tmp.path, ".agents", "skills", "global-agent-skill")
+          yield* writeSkill(
-          yield* Effect.promise(() => fs.mkdir(skillDir, { recursive: true }))
+            test.directory,
-          yield* Effect.promise(() =>
+            [".agents", "skills", "global-agent-skill"],
-            Bun.write(
+            `---
-              path.join(skillDir, "SKILL.md"),
-              `---
 name: global-agent-skill
 description: A global skill from ~/.agents/skills for testing.
 ---
@@ -372,198 +342,198 @@ description: A global skill from ~/.agents/skills for testing.
 
 This skill is loaded from the global home directory.
 `,
-            ),
           )
 
-          yield* Effect.gen(function* () {
+          const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-            const skill = yield* Skill.Service
+          expect(list.length).toBe(1)
-            const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+          expect(list[0].name).toBe("global-agent-skill")
-            expect(list.length).toBe(1)
+          expect(list[0].description).toBe("A global skill from ~/.agents/skills for testing.")
-            expect(list[0].name).toBe("global-agent-skill")
+          expect(list[0].location).toContain(path.join(".agents", "skills", "global-agent-skill", "SKILL.md"))
-            expect(list[0].description).toBe("A global skill from ~/.agents/skills for testing.")
-            expect(list[0].location).toContain(path.join(".agents", "skills", "global-agent-skill", "SKILL.md"))
-          }).pipe(provideInstance(tmp.path))
         }),
       )
     }),
+    { git: true },
   )
 
-  it.live("discovers skills from both .claude/skills/ and .agents/skills/", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "discovers skills from both .claude/skills/ and .agents/skills/",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* Effect.all(
-            Promise.all([
+        [
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".claude", "skills", "claude-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".claude", "skills", "claude-skill"],
+            `---
 name: claude-skill
 description: A skill in the .claude/skills directory.
 ---
 
 # Claude Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".agents", "skills", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".agents", "skills", "agent-skill"],
+            `---
 name: agent-skill
 description: A skill in the .agents/skills directory.
 ---
 
 # Agent Skill
 `,
-              ),
+          ),
-            ]),
+        ],
-          )
+      )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.length).toBe(2)
-          expect(list.length).toBe(2)
+      expect(list.find((x) => x.name === "claude-skill")).toBeDefined()
-          expect(list.find((x) => x.name === "claude-skill")).toBeDefined()
+      expect(list.find((x) => x.name === "agent-skill")).toBeDefined()
-          expect(list.find((x) => x.name === "agent-skill")).toBeDefined()
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  itWithoutClaudeCodeSkills.live("skips Claude Code skills when disabled", () =>
+  itWithoutClaudeCodeSkills.instance(
-    provideTmpdirInstance(
+    "skips Claude Code skills when disabled",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* Effect.all(
-            Promise.all([
+        [
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".claude", "skills", "claude-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".claude", "skills", "claude-skill"],
+            `---
 name: claude-skill
 description: A skill in the .claude/skills directory.
 ---
 
 # Claude Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".agents", "skills", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".agents", "skills", "agent-skill"],
+            `---
 name: agent-skill
 description: A skill in the .agents/skills directory.
 ---
 
 # Agent Skill
 `,
-              ),
+          ),
-            ]),
+        ],
-          )
+      )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.map((s) => s.name)).toEqual(["agent-skill"])
-          expect(list.map((s) => s.name)).toEqual(["agent-skill"])
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  itWithoutExternalSkills.live("skips external skill directories when disabled", () =>
+  itWithoutExternalSkills.instance(
-    provideTmpdirInstance(
+    "skips external skill directories when disabled",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* Effect.all(
-            Promise.all([
+        [
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".claude", "skills", "claude-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".claude", "skills", "claude-skill"],
+            `---
 name: claude-skill
 description: A skill in the .claude/skills directory.
 ---
 
 # Claude Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".agents", "skills", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".agents", "skills", "agent-skill"],
+            `---
 name: agent-skill
 description: A skill in the .agents/skills directory.
 ---
 
 # Agent Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".opencode", "skill", "opencode-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skill", "opencode-skill"],
+            `---
 name: opencode-skill
 description: A skill in the .opencode/skill directory.
 ---
 
 # OpenCode Skill
 `,
-              ),
+          ),
-            ]),
+        ],
-          )
+      )
 
-          const skill = yield* Skill.Service
+      const list = (yield* Skill.use.all()).filter((s) => s.location !== "<built-in>")
-          const list = (yield* skill.all()).filter((s) => s.location !== "<built-in>")
+      expect(list.map((s) => s.name)).toEqual(["opencode-skill"])
-          expect(list.map((s) => s.name)).toEqual(["opencode-skill"])
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 
-  it.live("properly resolves directories that skills live in", () =>
+  it.instance(
-    provideTmpdirInstance(
+    "properly resolves directories that skills live in",
-      (dir) =>
+    Effect.gen(function* () {
-        Effect.gen(function* () {
+      const test = yield* TestInstance
-          yield* Effect.promise(() =>
+      yield* Effect.all(
-            Promise.all([
+        [
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".claude", "skills", "claude-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".claude", "skills", "claude-skill"],
+            `---
 name: claude-skill
 description: A skill in the .claude/skills directory.
 ---
 
 # Claude Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".agents", "skills", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".agents", "skills", "agent-skill"],
+            `---
 name: agent-skill
 description: A skill in the .agents/skills directory.
 ---
 
 # Agent Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".opencode", "skill", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skill", "agent-skill"],
+            `---
 name: opencode-skill
 description: A skill in the .opencode/skill directory.
 ---
 
 # OpenCode Skill
 `,
-              ),
+          ),
-              Bun.write(
+          writeSkill(
-                path.join(dir, ".opencode", "skills", "agent-skill", "SKILL.md"),
+            test.directory,
-                `---
+            [".opencode", "skills", "agent-skill"],
+            `---
 name: opencode-skill
 description: A skill in the .opencode/skills directory.
 ---
 
 # OpenCode Skill
 `,
-              ),
+          ),
-            ]),
+        ],
-          )
+      )
 
-          const skill = yield* Skill.Service
+      expect((yield* Skill.use.dirs()).length).toBe(4)
-          expect((yield* skill.dirs()).length).toBe(4)
+    }),
-        }),
+    { git: true },
-      { git: true },
-    ),
   )
 })

packages/opencode/test/tool/registry.test.ts

@@ -95,15 +95,25 @@ const brokenPluginLayer = Layer.succeed(
   }),
 )
 
-const it = testEffect(Layer.mergeAll(registryLayer(), node, Agent.defaultLayer))
+const it = testEffect(Layer.mergeAll(registryLayer(), node, Agent.defaultLayer, AppFileSystem.defaultLayer))
 const scout = testEffect(
-  Layer.mergeAll(registryLayer({ flags: { experimentalScout: true } }), node, Agent.defaultLayer),
+  Layer.mergeAll(
+    registryLayer({ flags: { experimentalScout: true } }),
+    node,
+    Agent.defaultLayer,
+    AppFileSystem.defaultLayer,
+  ),
 )
 const background = testEffect(
-  Layer.mergeAll(registryLayer({ flags: { experimentalBackgroundSubagents: true } }), node, Agent.defaultLayer),
+  Layer.mergeAll(
+    registryLayer({ flags: { experimentalBackgroundSubagents: true } }),
+    node,
+    Agent.defaultLayer,
+    AppFileSystem.defaultLayer,
+  ),
 )
 const withBrokenPlugin = testEffect(
-  Layer.mergeAll(registryLayer({ plugin: brokenPluginLayer }), node, Agent.defaultLayer),
+  Layer.mergeAll(registryLayer({ plugin: brokenPluginLayer }), node, Agent.defaultLayer, AppFileSystem.defaultLayer),
 )
 
 afterEach(async () => {
@@ -113,8 +123,7 @@ afterEach(async () => {
 describe("tool.registry", () => {
   it.instance("hides repo research tools unless experimental", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
 
       expect(ids).not.toContain("repo_clone")
       expect(ids).not.toContain("repo_overview")
@@ -123,8 +132,7 @@ describe("tool.registry", () => {
 
   scout.instance("shows repo research tools when experimental scout is enabled", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
 
       expect(ids).toContain("repo_clone")
       expect(ids).toContain("repo_overview")
@@ -133,8 +141,7 @@ describe("tool.registry", () => {
 
   it.instance("hides task_status unless experimental background subagents are enabled", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
 
       expect(ids).not.toContain("task_status")
     }),
@@ -142,11 +149,10 @@ describe("tool.registry", () => {
 
   it.instance("hides task background parameter unless experimental background subagents are enabled", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
       const agent = yield* Agent.Service
       const build = yield* agent.get("build")
       if (!build) throw new Error("build agent not found")
-      const task = (yield* registry.tools({
+      const task = (yield* ToolRegistry.use.tools({
         providerID: ProviderID.opencode,
         modelID: ModelID.make("test"),
         agent: build,
@@ -159,8 +165,7 @@ describe("tool.registry", () => {
 
   background.instance("shows task_status when experimental background subagents are enabled", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
 
       expect(ids).toContain("task_status")
     }),
@@ -169,26 +174,20 @@ describe("tool.registry", () => {
   it.instance("loads tools from .opencode/tool (singular)", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const opencode = path.join(test.directory, ".opencode")
+      yield* AppFileSystem.use.writeWithDirs(
-      const tool = path.join(opencode, "tool")
+        path.join(test.directory, ".opencode", "tool", "hello.ts"),
-      yield* Effect.promise(() => fs.mkdir(tool, { recursive: true }))
+        [
-      yield* Effect.promise(() =>
+          "export default {",
-        Bun.write(
+          "  description: 'hello tool',",
-          path.join(tool, "hello.ts"),
+          "  args: {},",
-          [
+          "  execute: async () => {",
-            "export default {",
+          "    return 'hello world'",
-            "  description: 'hello tool',",
+          "  },",
-            "  args: {},",
+          "}",
-            "  execute: async () => {",
+          "",
-            "    return 'hello world'",
+        ].join("\n"),
-            "  },",
-            "}",
-            "",
-          ].join("\n"),
-        ),
       )
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       expect(ids).toContain("hello")
     }),
   )
@@ -196,25 +195,20 @@ describe("tool.registry", () => {
   it.instance("ignores non-tool exports in .opencode/tool files", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const tool = path.join(test.directory, ".opencode", "tool")
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() => fs.mkdir(tool, { recursive: true }))
+        path.join(test.directory, ".opencode", "tool", "mixed.ts"),
-      yield* Effect.promise(() =>
+        [
-        Bun.write(
+          "export const helper = 'not a tool'",
-          path.join(tool, "mixed.ts"),
+          "export default {",
-          [
+          "  description: 'mixed tool',",
-            "export const helper = 'not a tool'",
+          "  args: {},",
-            "export default {",
+          "  execute: async () => 'ok',",
-            "  description: 'mixed tool',",
+          "}",
-            "  args: {},",
+          "",
-            "  execute: async () => 'ok',",
+        ].join("\n"),
-            "}",
-            "",
-          ].join("\n"),
-        ),
       )
 
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       expect(ids).toContain("mixed")
       expect(ids).not.toContain("mixed_helper")
     }),
@@ -229,28 +223,23 @@ describe("tool.registry", () => {
   it.instance("tolerates a custom tool exporting null/undefined args (no-args fallback)", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const tool = path.join(test.directory, ".opencode", "tool")
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() => fs.mkdir(tool, { recursive: true }))
+        path.join(test.directory, ".opencode", "tool", "noargs.ts"),
-      yield* Effect.promise(() =>
+        [
-        Bun.write(
+          "export default {",
-          path.join(tool, "noargs.ts"),
+          "  description: 'tool with no args',",
-          [
+          "  args: undefined,",
-            "export default {",
+          "  execute: async () => 'ok',",
-            "  description: 'tool with no args',",
+          "}",
-            "  args: undefined,",
+          "",
-            "  execute: async () => 'ok',",
+        ].join("\n"),
-            "}",
-            "",
-          ].join("\n"),
-        ),
       )
 
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       // Built-in tools must still load — a single malformed custom tool must
       // not poison the whole registry.
       expect(ids).toContain("read")
-      const loaded = (yield* registry.all()).find((t) => t.id === "noargs")
+      const loaded = (yield* ToolRegistry.use.all()).find((t) => t.id === "noargs")
       if (!loaded) throw new Error("noargs tool was not loaded")
       expect(loaded.jsonSchema).toMatchObject({ type: "object", properties: {} })
     }),
@@ -264,8 +253,7 @@ describe("tool.registry", () => {
   // protection.
   withBrokenPlugin.instance("tolerates a plugin tool registered with null/undefined args", () =>
     Effect.gen(function* () {
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       expect(ids).toContain("read")
       expect(ids).toContain("broken_plugin_tool")
     }),
@@ -274,26 +262,20 @@ describe("tool.registry", () => {
   it.instance("loads tools from .opencode/tools (plural)", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const opencode = path.join(test.directory, ".opencode")
+      yield* AppFileSystem.use.writeWithDirs(
-      const tools = path.join(opencode, "tools")
+        path.join(test.directory, ".opencode", "tools", "hello.ts"),
-      yield* Effect.promise(() => fs.mkdir(tools, { recursive: true }))
+        [
-      yield* Effect.promise(() =>
+          "export default {",
-        Bun.write(
+          "  description: 'hello tool',",
-          path.join(tools, "hello.ts"),
+          "  args: {},",
-          [
+          "  execute: async () => {",
-            "export default {",
+          "    return 'hello world'",
-            "  description: 'hello tool',",
+          "  },",
-            "  args: {},",
+          "}",
-            "  execute: async () => {",
+          "",
-            "    return 'hello world'",
+        ].join("\n"),
-            "  },",
-            "}",
-            "",
-          ].join("\n"),
-        ),
       )
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       expect(ids).toContain("hello")
     }),
   )
@@ -301,26 +283,21 @@ describe("tool.registry", () => {
   it.instance("loads Zod-schema custom tools with JSON Schema and validation", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const customTools = path.join(test.directory, ".opencode", "tools")
       const pluginTool = pathToFileURL(path.resolve(import.meta.dir, "../../../plugin/src/tool.ts")).href
-      yield* Effect.promise(() => fs.mkdir(customTools, { recursive: true }))
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() =>
+        path.join(test.directory, ".opencode", "tools", "sql.ts"),
-        Bun.write(
+        [
-          path.join(customTools, "sql.ts"),
+          `import { tool } from ${JSON.stringify(pluginTool)}`,
-          [
+          "export default tool({",
-            `import { tool } from ${JSON.stringify(pluginTool)}`,
+          "  description: 'query database',",
-            "export default tool({",
+          "  args: { query: tool.schema.string().describe('SQL query to execute') },",
-            "  description: 'query database',",
+          "  execute: async ({ query }) => query,",
-            "  args: { query: tool.schema.string().describe('SQL query to execute') },",
+          "})",
-            "  execute: async ({ query }) => query,",
+          "",
-            "})",
+        ].join("\n"),
-            "",
-          ].join("\n"),
-        ),
       )
 
-      const registry = yield* ToolRegistry.Service
+      const loaded = (yield* ToolRegistry.use.all()).find((tool) => tool.id === "sql")
-      const loaded = (yield* registry.all()).find((tool) => tool.id === "sql")
       if (!loaded) throw new Error("custom sql tool was not loaded")
       expect(loaded?.jsonSchema).toMatchObject({
         type: "object",
@@ -333,7 +310,7 @@ describe("tool.registry", () => {
       expect(Result.isSuccess(Schema.decodeUnknownResult(loaded.parameters)({}))).toBe(false)
 
       const agents = yield* Agent.Service
-      const promptTools = yield* registry.tools({
+      const promptTools = yield* ToolRegistry.use.tools({
         providerID: ProviderID.opencode,
         modelID: ModelID.make("test"),
         agent: yield* agents.defaultInfo(),
@@ -357,53 +334,44 @@ describe("tool.registry", () => {
         const opencode = path.join(test.directory, ".opencode")
         const customTools = path.join(opencode, "tools")
         const plugin = path.join(opencode, "node_modules", "@opencode-ai", "plugin")
-        yield* Effect.promise(() => fs.mkdir(path.join(plugin, "dist"), { recursive: true }))
-        yield* Effect.promise(() => fs.mkdir(customTools, { recursive: true }))
         yield* Effect.promise(() =>
           fs.cp(path.dirname(fileURLToPath(import.meta.resolve("zod"))), path.join(opencode, "node_modules", "zod"), {
             dereference: true,
             recursive: true,
           }),
         )
-        yield* Effect.promise(() =>
+        yield* AppFileSystem.use.writeWithDirs(
-          Bun.write(
+          path.join(plugin, "package.json"),
-            path.join(plugin, "package.json"),
+          JSON.stringify({ name: "@opencode-ai/plugin", type: "module", exports: { ".": "./dist/index.js" } }),
-            JSON.stringify({ name: "@opencode-ai/plugin", type: "module", exports: { ".": "./dist/index.js" } }),
-          ),
         )
-        yield* Effect.promise(() =>
+        yield* AppFileSystem.use.writeWithDirs(
-          Bun.write(
+          path.join(plugin, "dist", "index.js"),
-            path.join(plugin, "dist", "index.js"),
+          [
-            [
+            "import { z } from 'zod'",
-              "import { z } from 'zod'",
+            "export function tool(input) {",
-              "export function tool(input) {",
+            "  return input",
-              "  return input",
+            "}",
-              "}",
+            "tool.schema = z",
-              "tool.schema = z",
+            "",
-              "",
+          ].join("\n"),
-            ].join("\n"),
-          ),
         )
-        yield* Effect.promise(() =>
+        yield* AppFileSystem.use.writeWithDirs(
-          Bun.write(
+          path.join(customTools, "addition.ts"),
-            path.join(customTools, "addition.ts"),
+          [
-            [
+            'import { tool } from "@opencode-ai/plugin"',
-              'import { tool } from "@opencode-ai/plugin"',
+            "export default tool({",
-              "export default tool({",
+            "  description: 'Use this tool to add two numbers and return their sum.',",
-              "  description: 'Use this tool to add two numbers and return their sum.',",
+            "  args: {",
-              "  args: {",
+            "    left: tool.schema.number().describe('The first number to add'),",
-              "    left: tool.schema.number().describe('The first number to add'),",
+            "    right: tool.schema.number().describe('The second number to add'),",
-              "    right: tool.schema.number().describe('The second number to add'),",
+            "  },",
-              "  },",
+            "  execute: async (args) => `${args.left} + ${args.right} = ${args.left + args.right}`,",
-              "  execute: async (args) => `${args.left} + ${args.right} = ${args.left + args.right}`,",
+            "})",
-              "})",
+            "",
-              "",
+          ].join("\n"),
-            ].join("\n"),
-          ),
         )
 
-        const registry = yield* ToolRegistry.Service
+        const loaded = (yield* ToolRegistry.use.all()).find((tool) => tool.id === "addition")
-        const loaded = (yield* registry.all()).find((tool) => tool.id === "addition")
         if (!loaded) throw new Error("custom addition tool was not loaded")
 
         expect(ToolJsonSchema.fromTool(loaded)).toMatchObject({
@@ -419,29 +387,24 @@ describe("tool.registry", () => {
   it.instance("preserves attachments from structured custom tool results", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const customTools = path.join(test.directory, ".opencode", "tools")
       const pluginTool = pathToFileURL(path.resolve(import.meta.dir, "../../../plugin/src/tool.ts")).href
-      yield* Effect.promise(() => fs.mkdir(customTools, { recursive: true }))
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() =>
+        path.join(test.directory, ".opencode", "tools", "image.ts"),
-        Bun.write(
+        [
-          path.join(customTools, "image.ts"),
+          `import { tool } from ${JSON.stringify(pluginTool)}`,
-          [
+          "export default tool({",
-            `import { tool } from ${JSON.stringify(pluginTool)}`,
+          "  description: 'image tool',",
-            "export default tool({",
+          "  args: {},",
-            "  description: 'image tool',",
+          "  execute: async () => ({",
-            "  args: {},",
+          "    output: 'here is an image',",
-            "  execute: async () => ({",
+          "    attachments: [{ type: 'file', mime: 'image/png', filename: 'picture.png', url: 'data:image/png;base64,AAAA' }],",
-            "    output: 'here is an image',",
+          "  }),",
-            "    attachments: [{ type: 'file', mime: 'image/png', filename: 'picture.png', url: 'data:image/png;base64,AAAA' }],",
+          "})",
-            "  }),",
+          "",
-            "})",
+        ].join("\n"),
-            "",
-          ].join("\n"),
-        ),
       )
 
-      const registry = yield* ToolRegistry.Service
+      const loaded = (yield* ToolRegistry.use.all()).find((tool) => tool.id === "image")
-      const loaded = (yield* registry.all()).find((tool) => tool.id === "image")
       if (!loaded) throw new Error("custom image tool was not loaded")
       const agents = yield* Agent.Service
       const result = yield* loaded.execute({}, {
@@ -464,24 +427,19 @@ describe("tool.registry", () => {
   it.instance("loads legacy JSON-schema-shaped custom tools with wire schema", () =>
     Effect.gen(function* () {
       const test = yield* TestInstance
-      const tools = path.join(test.directory, ".opencode", "tools")
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() => fs.mkdir(tools, { recursive: true }))
+        path.join(test.directory, ".opencode", "tools", "legacy.ts"),
-      yield* Effect.promise(() =>
+        [
-        Bun.write(
+          "export default {",
-          path.join(tools, "legacy.ts"),
+          "  description: 'legacy schema tool',",
-          [
+          "  args: { text: { type: 'string', description: 'Text to render' } },",
-            "export default {",
+          "  execute: async ({ text }) => text,",
-            "  description: 'legacy schema tool',",
+          "}",
-            "  args: { text: { type: 'string', description: 'Text to render' } },",
+          "",
-            "  execute: async ({ text }) => text,",
+        ].join("\n"),
-            "}",
-            "",
-          ].join("\n"),
-        ),
       )
 
-      const registry = yield* ToolRegistry.Service
+      const loaded = (yield* ToolRegistry.use.all()).find((tool) => tool.id === "legacy")
-      const loaded = (yield* registry.all()).find((tool) => tool.id === "legacy")
       if (!loaded) throw new Error("legacy custom tool was not loaded")
       expect(ToolJsonSchema.fromTool(loaded)).toMatchObject({
         type: "object",
@@ -498,73 +456,60 @@ describe("tool.registry", () => {
       const test = yield* TestInstance
       const opencode = path.join(test.directory, ".opencode")
       const tools = path.join(opencode, "tools")
-      yield* Effect.promise(() => fs.mkdir(tools, { recursive: true }))
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() =>
+        path.join(opencode, "package.json"),
-        Bun.write(
+        JSON.stringify({
-          path.join(opencode, "package.json"),
+          name: "custom-tools",
-          JSON.stringify({
+          dependencies: {
-            name: "custom-tools",
+            "@opencode-ai/plugin": "^0.0.0",
-            dependencies: {
+            cowsay: "^1.6.0",
-              "@opencode-ai/plugin": "^0.0.0",
+          },
-              cowsay: "^1.6.0",
+        }),
-            },
-          }),
-        ),
       )
-      yield* Effect.promise(() =>
+      yield* AppFileSystem.use.writeWithDirs(
-        Bun.write(
+        path.join(opencode, "package-lock.json"),
-          path.join(opencode, "package-lock.json"),
+        JSON.stringify({
-          JSON.stringify({
+          name: "custom-tools",
-            name: "custom-tools",
+          lockfileVersion: 3,
-            lockfileVersion: 3,
+          packages: {
-            packages: {
+            "": {
-              "": {
+              dependencies: {
-                dependencies: {
+                "@opencode-ai/plugin": "^0.0.0",
-                  "@opencode-ai/plugin": "^0.0.0",
+                cowsay: "^1.6.0",
-                  cowsay: "^1.6.0",
-                },
               },
             },
-          }),
+          },
-        ),
+        }),
       )
 
       const cowsay = path.join(opencode, "node_modules", "cowsay")
-      yield* Effect.promise(() => fs.mkdir(cowsay, { recursive: true }))
+      yield* AppFileSystem.use.writeWithDirs(
-      yield* Effect.promise(() =>
+        path.join(cowsay, "package.json"),
-        Bun.write(
+        JSON.stringify({
-          path.join(cowsay, "package.json"),
+          name: "cowsay",
-          JSON.stringify({
+          type: "module",
-            name: "cowsay",
+          exports: "./index.js",
-            type: "module",
+        }),
-            exports: "./index.js",
-          }),
-        ),
       )
-      yield* Effect.promise(() =>
+      yield* AppFileSystem.use.writeWithDirs(
-        Bun.write(
+        path.join(cowsay, "index.js"),
-          path.join(cowsay, "index.js"),
+        ["export function say({ text }) {", "  return `moo ${text}`", "}", ""].join("\n"),
-          ["export function say({ text }) {", "  return `moo ${text}`", "}", ""].join("\n"),
-        ),
       )
-      yield* Effect.promise(() =>
+      yield* AppFileSystem.use.writeWithDirs(
-        Bun.write(
+        path.join(tools, "cowsay.ts"),
-          path.join(tools, "cowsay.ts"),
+        [
-          [
+          "import { say } from 'cowsay'",
-            "import { say } from 'cowsay'",
+          "export default {",
-            "export default {",
+          "  description: 'tool that imports cowsay at top level',",
-            "  description: 'tool that imports cowsay at top level',",
+          "  args: { text: { type: 'string' } },",
-            "  args: { text: { type: 'string' } },",
+          "  execute: async ({ text }: { text: string }) => {",
-            "  execute: async ({ text }: { text: string }) => {",
+          "    return say({ text })",
-            "    return say({ text })",
+          "  },",
-            "  },",
+          "}",
-            "}",
+          "",
-            "",
+        ].join("\n"),
-          ].join("\n"),
-        ),
       )
-      const registry = yield* ToolRegistry.Service
+      const ids = yield* ToolRegistry.use.ids()
-      const ids = yield* registry.ids()
       expect(ids).toContain("cowsay")
     }),
   )

packages/opencode/test/tool/skill.test.ts

@@ -1,4 +1,5 @@
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Cause, Effect, Exit, Layer } from "effect"
 import { afterEach, describe, expect } from "bun:test"
 import path from "path"
@@ -7,6 +8,7 @@ import type { Permission } from "../../src/permission"
 import type { Tool } from "@/tool/tool"
 import { SkillTool } from "../../src/tool/skill"
 import { ToolRegistry } from "@/tool/registry"
+import { ModelID, ProviderID } from "../../src/provider/schema"
 import { disposeAllInstances, provideTmpdirInstance } from "../fixture/fixture"
 import { SessionID, MessageID } from "../../src/session/schema"
 import { testEffect } from "../lib/effect"
@@ -27,17 +29,16 @@ afterEach(async () => {
 
 const node = CrossSpawnSpawner.defaultLayer
 
-const it = testEffect(Layer.mergeAll(ToolRegistry.defaultLayer, node))
+const it = testEffect(Layer.mergeAll(ToolRegistry.defaultLayer, node, AppFileSystem.defaultLayer))
 
 describe("tool.skill", () => {
   it.live("execute returns skill content block with files", () =>
     provideTmpdirInstance((dir) =>
       Effect.gen(function* () {
         const skill = path.join(dir, ".opencode", "skill", "tool-skill")
-        yield* Effect.promise(() =>
+        yield* AppFileSystem.use.writeWithDirs(
-          Bun.write(
+          path.join(skill, "SKILL.md"),
-            path.join(skill, "SKILL.md"),
+          `---
-            `---
 name: tool-skill
 description: Skill for tool tests.
 ---
@@ -46,9 +47,8 @@ description: Skill for tool tests.
 
 Use this skill.
 `,
-          ),
         )
-        yield* Effect.promise(() => Bun.write(path.join(skill, "scripts", "demo.txt"), "demo"))
+        yield* AppFileSystem.use.writeWithDirs(path.join(skill, "scripts", "demo.txt"), "demo")
 
         const home = process.env.OPENCODE_TEST_HOME
         process.env.OPENCODE_TEST_HOME = dir
@@ -61,8 +61,8 @@ Use this skill.
         const registry = yield* ToolRegistry.Service
         const agent = { name: "build", mode: "primary" as const, permission: [], options: {} }
         const tool = (yield* registry.tools({
-          providerID: "opencode" as any,
+          providerID: ProviderID.opencode,
-          modelID: "gpt-5" as any,
+          modelID: ModelID.make("gpt-5"),
           agent,
         })).find((tool) => tool.id === SkillTool.id)
         if (!tool) throw new Error("Skill tool not found")
@@ -105,8 +105,8 @@ Use this skill.
         const registry = yield* ToolRegistry.Service
         const agent = { name: "build", mode: "primary" as const, permission: [], options: {} }
         const tool = (yield* registry.tools({
-          providerID: "opencode" as any,
+          providerID: ProviderID.opencode,
-          modelID: "gpt-5" as any,
+          modelID: ModelID.make("gpt-5"),
           agent,
         })).find((tool) => tool.id === SkillTool.id)
         if (!tool) throw new Error("Skill tool not found")