Migrate provider lookup tests to instance fixtures

Migrate provider env precedence, model lookup, and default model tests to Effect-aware instance fixtures while keeping behavior unchanged.

packages/opencode/test/provider/provider.test.ts

@@ -87,10 +87,6 @@ async function getModel(providerID: ProviderID, modelID: ModelID, ctx: InstanceC
   return run(ctx, (provider) => provider.getModel(providerID, modelID))
 }
 
-async function getLanguage(model: Provider.Model, ctx: InstanceContext) {
-  return run(ctx, (provider) => provider.getLanguage(model))
-}
-
 async function closest(providerID: ProviderID, query: string[], ctx: InstanceContext) {
   return run(ctx, (provider) => provider.closest(providerID, query))
 }
@@ -99,10 +95,6 @@ async function getSmallModel(providerID: ProviderID, ctx: InstanceContext) {
   return run(ctx, (provider) => provider.getSmallModel(providerID))
 }
 
-async function defaultModel(ctx: InstanceContext) {
-  return run(ctx, (provider) => provider.defaultModel())
-}
-
 function paid(providers: Awaited<ReturnType<typeof list>>) {
   const item = providers[ProviderID.make("opencode")]
   expect(item).toBeDefined()
@@ -361,62 +353,42 @@ it.instance(
   },
 )
 
-test("env variable takes precedence, config merges options", async () => {
-  await using tmp = await tmpdir({
-    init: async (dir) => {
-      await Bun.write(
-        path.join(dir, "opencode.json"),
-        JSON.stringify({
-          $schema: "https://opencode.ai/config.json",
-          provider: {
-            anthropic: {
-              options: {
-                timeout: 60000,
-                chunkTimeout: 15000,
-              },
-            },
+it.instance(
+  "env variable takes precedence, config merges options",
+  Effect.gen(function* () {
+    yield* setProcessEnv("ANTHROPIC_API_KEY", "env-api-key")
+    const providers = yield* Provider.Service.use((provider) => provider.list())
+    expect(providers[ProviderID.anthropic]).toBeDefined()
+    // Config options should be merged
+    expect(providers[ProviderID.anthropic].options.timeout).toBe(60000)
+    expect(providers[ProviderID.anthropic].options.chunkTimeout).toBe(15000)
+  }),
+  {
+    config: {
+      provider: {
+        anthropic: {
+          options: {
+            timeout: 60000,
+            chunkTimeout: 15000,
           },
-        }),
-      )
-    },
-  })
-  await withTestInstance({
-    directory: tmp.path,
-    fn: async (ctx) => {
-      await set(ctx, "ANTHROPIC_API_KEY", "env-api-key")
-      const providers = await list(ctx)
-      expect(providers[ProviderID.anthropic]).toBeDefined()
-      // Config options should be merged
-      expect(providers[ProviderID.anthropic].options.timeout).toBe(60000)
-      expect(providers[ProviderID.anthropic].options.chunkTimeout).toBe(15000)
+        },
+      },
     },
-  })
-})
+  },
+)
 
-test("getModel returns model for valid provider/model", async () => {
-  await using tmp = await tmpdir({
-    init: async (dir) => {
-      await Bun.write(
-        path.join(dir, "opencode.json"),
-        JSON.stringify({
-          $schema: "https://opencode.ai/config.json",
-        }),
-      )
-    },
-  })
-  await withTestInstance({
-    directory: tmp.path,
-    fn: async (ctx) => {
-      await set(ctx, "ANTHROPIC_API_KEY", "test-api-key")
-      const model = await getModel(ProviderID.anthropic, ModelID.make("claude-sonnet-4-20250514"), ctx)
-      expect(model).toBeDefined()
-      expect(String(model.providerID)).toBe("anthropic")
-      expect(String(model.id)).toBe("claude-sonnet-4-20250514")
-      const language = await getLanguage(model, ctx)
-      expect(language).toBeDefined()
-    },
-  })
-})
+it.instance("getModel returns model for valid provider/model", () =>
+  Effect.gen(function* () {
+    yield* setProcessEnv("ANTHROPIC_API_KEY", "test-api-key")
+    const provider = yield* Provider.Service
+    const model = yield* provider.getModel(ProviderID.anthropic, ModelID.make("claude-sonnet-4-20250514"))
+    expect(model).toBeDefined()
+    expect(String(model.providerID)).toBe("anthropic")
+    expect(String(model.id)).toBe("claude-sonnet-4-20250514")
+    const language = yield* provider.getLanguage(model)
+    expect(language).toBeDefined()
+  }),
+)
 
 test("getModel throws ModelNotFoundError for invalid model", async () => {
   await using tmp = await tmpdir({
@@ -469,50 +441,25 @@ test("parseModel handles model IDs with slashes", () => {
   expect(String(result.modelID)).toBe("anthropic/claude-3-opus")
 })
 
-test("defaultModel returns first available model when no config set", async () => {
-  await using tmp = await tmpdir({
-    init: async (dir) => {
-      await Bun.write(
-        path.join(dir, "opencode.json"),
-        JSON.stringify({
-          $schema: "https://opencode.ai/config.json",
-        }),
-      )
-    },
-  })
-  await withTestInstance({
-    directory: tmp.path,
-    fn: async (ctx) => {
-      await set(ctx, "ANTHROPIC_API_KEY", "test-api-key")
-      const model = await defaultModel(ctx)
-      expect(model.providerID).toBeDefined()
-      expect(model.modelID).toBeDefined()
-    },
-  })
-})
+it.instance("defaultModel returns first available model when no config set", () =>
+  Effect.gen(function* () {
+    yield* setProcessEnv("ANTHROPIC_API_KEY", "test-api-key")
+    const model = yield* Provider.Service.use((provider) => provider.defaultModel())
+    expect(model.providerID).toBeDefined()
+    expect(model.modelID).toBeDefined()
+  }),
+)
 
-test("defaultModel respects config model setting", async () => {
-  await using tmp = await tmpdir({
-    init: async (dir) => {
-      await Bun.write(
-        path.join(dir, "opencode.json"),
-        JSON.stringify({
-          $schema: "https://opencode.ai/config.json",
-          model: "anthropic/claude-sonnet-4-20250514",
-        }),
-      )
-    },
-  })
-  await withTestInstance({
-    directory: tmp.path,
-    fn: async (ctx) => {
-      await set(ctx, "ANTHROPIC_API_KEY", "test-api-key")
-      const model = await defaultModel(ctx)
-      expect(String(model.providerID)).toBe("anthropic")
-      expect(String(model.modelID)).toBe("claude-sonnet-4-20250514")
-    },
-  })
-})
+it.instance(
+  "defaultModel respects config model setting",
+  Effect.gen(function* () {
+    yield* setProcessEnv("ANTHROPIC_API_KEY", "test-api-key")
+    const model = yield* Provider.Service.use((provider) => provider.defaultModel())
+    expect(String(model.providerID)).toBe("anthropic")
+    expect(String(model.modelID)).toBe("claude-sonnet-4-20250514")
+  }),
+  { config: { model: "anthropic/claude-sonnet-4-20250514" } },
+)
 
 it.instance(
   "provider with baseURL from config",

perf/test-suite.md

@@ -70,6 +70,7 @@ Repeated setup work, long sleeps/timeouts, serial integration tests, filesystem/
 | File watcher readiness can write before async native subscriptions are active                             | Retried short readiness writes and accepted symlink-realpath HEAD events                       | failed    | 4.62s   | keep     | Three sequential focused watcher runs passed: 4.62s, 4.57s, 4.64s; full suite no longer failed in `watcher.test.ts`.        |
 | First provider config/env/filtering block can use Effect-aware instance fixtures                          | Migrated six `tmpdir` + `withTestInstance` cases to `it.instance`                              | 6.06s     | 6.07s   | keep     | Neutral timing, but removes manual config file writes and instance plumbing; use as the pattern for later provider slices.  |
 | Custom provider/model config cases can use Effect-aware instance fixtures                                 | Migrated three more config-heavy provider cases to `it.instance`                               | 6.07s     | 6.12s   | keep     | Neutral timing within noise, but continues removing manual config file writes on top of the first provider fixture PR.      |
+| Provider env precedence and model lookup cases can use Effect-aware instance fixtures                     | Migrated four more provider lookup/default-model cases to `it.instance`                        | 6.12s     | 6.36s   | keep     | Noisy 5-run median; kept as a small stacked cleanup slice but do not claim speedup from this migration.                     |
 
 ## Profiling Results