fix(config): promote hashline_edit to top-level flag

Move hashline_edit out of experimental so it is a stable top-level config with default-on runtime behavior and explicit disable support. Add migration and tests to preserve existing experimental.hashline_edit users without breaking configs.

src/config/schema.test.ts

@@ -644,6 +644,55 @@ describe("OhMyOpenCodeConfigSchema - browser_automation_engine", () => {
   })
 })
 
+describe("OhMyOpenCodeConfigSchema - hashline_edit", () => {
+  test("accepts hashline_edit as true", () => {
+    //#given
+    const input = { hashline_edit: true }
+
+    //#when
+    const result = OhMyOpenCodeConfigSchema.safeParse(input)
+
+    //#then
+    expect(result.success).toBe(true)
+    expect(result.data?.hashline_edit).toBe(true)
+  })
+
+  test("accepts hashline_edit as false", () => {
+    //#given
+    const input = { hashline_edit: false }
+
+    //#when
+    const result = OhMyOpenCodeConfigSchema.safeParse(input)
+
+    //#then
+    expect(result.success).toBe(true)
+    expect(result.data?.hashline_edit).toBe(false)
+  })
+
+  test("hashline_edit is optional", () => {
+    //#given
+    const input = { auto_update: true }
+
+    //#when
+    const result = OhMyOpenCodeConfigSchema.safeParse(input)
+
+    //#then
+    expect(result.success).toBe(true)
+    expect(result.data?.hashline_edit).toBeUndefined()
+  })
+
+  test("rejects non-boolean hashline_edit", () => {
+    //#given
+    const input = { hashline_edit: "true" }
+
+    //#when
+    const result = OhMyOpenCodeConfigSchema.safeParse(input)
+
+    //#then
+    expect(result.success).toBe(false)
+  })
+})
+
 describe("ExperimentalConfigSchema feature flags", () => {
   test("accepts plugin_load_timeout_ms as number", () => {
     //#given
@@ -699,48 +748,6 @@ describe("ExperimentalConfigSchema feature flags", () => {
     }
   })
 
-  test("accepts hashline_edit as true", () => {
-    //#given
-    const config = { hashline_edit: true }
-
-    //#when
-    const result = ExperimentalConfigSchema.safeParse(config)
-
-    //#then
-    expect(result.success).toBe(true)
-    if (result.success) {
-      expect(result.data.hashline_edit).toBe(true)
-    }
-  })
-
-  test("accepts hashline_edit as false", () => {
-    //#given
-    const config = { hashline_edit: false }
-
-    //#when
-    const result = ExperimentalConfigSchema.safeParse(config)
-
-    //#then
-    expect(result.success).toBe(true)
-    if (result.success) {
-      expect(result.data.hashline_edit).toBe(false)
-    }
-  })
-
-  test("hashline_edit is optional", () => {
-    //#given
-    const config = { safe_hook_creation: true }
-
-    //#when
-    const result = ExperimentalConfigSchema.safeParse(config)
-
-    //#then
-    expect(result.success).toBe(true)
-    if (result.success) {
-      expect(result.data.hashline_edit).toBeUndefined()
-    }
-  })
-
   test("accepts disable_omo_env as true", () => {
     //#given
     const config = { disable_omo_env: true }
@@ -794,16 +801,6 @@ describe("ExperimentalConfigSchema feature flags", () => {
     expect(result.success).toBe(false)
   })
 
-  test("rejects non-boolean hashline_edit", () => {
-    //#given
-    const config = { hashline_edit: "true" }
-
-    //#when
-    const result = ExperimentalConfigSchema.safeParse(config)
-
-    //#then
-    expect(result.success).toBe(false)
-  })
 })
 
 describe("GitMasterConfigSchema", () => {

src/config/schema/experimental.ts

@@ -17,8 +17,6 @@ export const ExperimentalConfigSchema = z.object({
   safe_hook_creation: z.boolean().optional(),
   /** Disable auto-injected <omo-env> context in prompts (experimental) */
   disable_omo_env: z.boolean().optional(),
-  /** Enable hashline_edit tool for improved file editing with hash-based line anchors */
-  hashline_edit: z.boolean().optional(),
 })
 
 export type ExperimentalConfig = z.infer<typeof ExperimentalConfigSchema>

src/config/schema/oh-my-opencode-config.ts

@@ -33,6 +33,8 @@ export const OhMyOpenCodeConfigSchema = z.object({
   disabled_commands: z.array(BuiltinCommandNameSchema).optional(),
   /** Disable specific tools by name (e.g., ["todowrite", "todoread"]) */
   disabled_tools: z.array(z.string()).optional(),
+  /** Enable hashline_edit tool/hook integrations (default: true at call site) */
+  hashline_edit: z.boolean().optional(),
   agents: AgentOverridesSchema.optional(),
   categories: CategoriesConfigSchema.optional(),
   claude_code: ClaudeCodeConfigSchema.optional(),