fix: use jsonc-parser for safe JSONC migration and add project-local config detection

src/hooks/legacy-plugin-toast/hook.test.ts

@@ -1,10 +1,15 @@
+/// <reference path="../../../bun-test.d.ts" />
+
 import { afterAll, beforeEach, describe, expect, it, mock } from "bun:test"
+
+import type { LegacyPluginCheckResult } from "../../shared/legacy-plugin-warning"
 import type { MigrationResult } from "./auto-migrate"
 
-const mockCheckForLegacyPluginEntry = mock(() => ({
+const mockCheckForLegacyPluginEntry = mock((): LegacyPluginCheckResult => ({
   hasLegacyEntry: false,
   hasCanonicalEntry: false,
   legacyEntries: [] as string[],
+  configPath: null,
 }))
 
 const mockAutoMigrate = mock((): MigrationResult => ({
@@ -67,6 +72,7 @@ describe("createLegacyPluginToastHook", () => {
       hasLegacyEntry: false,
       hasCanonicalEntry: true,
       legacyEntries: [],
+      configPath: null,
     })
     mockAutoMigrate.mockReturnValue({ migrated: false, from: null, to: null, configPath: null })
     mockShowToast.mockResolvedValue(undefined)
@@ -93,6 +99,7 @@ describe("createLegacyPluginToastHook", () => {
         hasLegacyEntry: true,
         hasCanonicalEntry: false,
         legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/opencode.json",
       })
       mockAutoMigrate.mockReturnValue({
         migrated: true,
@@ -120,6 +127,7 @@ describe("createLegacyPluginToastHook", () => {
         hasLegacyEntry: true,
         hasCanonicalEntry: false,
         legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/opencode.json",
       })
       mockAutoMigrate.mockReturnValue({
         migrated: false,
@@ -147,6 +155,7 @@ describe("createLegacyPluginToastHook", () => {
         hasLegacyEntry: true,
         hasCanonicalEntry: false,
         legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/opencode.json",
       })
       mockAutoMigrate.mockReturnValue({
         migrated: true,
@@ -173,6 +182,7 @@ describe("createLegacyPluginToastHook", () => {
         hasLegacyEntry: true,
         hasCanonicalEntry: false,
         legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/opencode.json",
       })
       const { createLegacyPluginToastHook } = await importFreshModule()
       const hook = createLegacyPluginToastHook(createMockCtx())
@@ -192,6 +202,7 @@ describe("createLegacyPluginToastHook", () => {
         hasLegacyEntry: true,
         hasCanonicalEntry: false,
         legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/opencode.json",
       })
       const { createLegacyPluginToastHook } = await importFreshModule()
       const hook = createLegacyPluginToastHook(createMockCtx())
@@ -203,4 +214,25 @@ describe("createLegacyPluginToastHook", () => {
       expect(mockCheckForLegacyPluginEntry).not.toHaveBeenCalled()
     })
   })
+
+  describe("#given a project directory is available", () => {
+    it("#then passes the project directory into legacy config detection", async () => {
+      // given
+      mockCheckForLegacyPluginEntry.mockReturnValue({
+        hasLegacyEntry: true,
+        hasCanonicalEntry: false,
+        legacyEntries: ["oh-my-opencode"],
+        configPath: "/tmp/test/.opencode/opencode.json",
+      })
+      const { createLegacyPluginToastHook } = await importFreshModule()
+      const hook = createLegacyPluginToastHook(createMockCtx())
+
+      // when
+      await hook.event(createEvent("session.created"))
+
+      // then
+      expect(mockCheckForLegacyPluginEntry).toHaveBeenCalledWith(undefined, "/tmp/test")
+      expect(mockAutoMigrate).toHaveBeenCalledWith("/tmp/test/.opencode")
+    })
+  })
 })