fix: resolve 25 pre-publish blockers

- postinstall.mjs: fix alias package detection
- migrate-legacy-plugin-entry: dedupe + regression tests
- task_system: default consistency across runtime paths
- task() contract: consistent tool behavior
- runtime model selection, tool cap, stale-task cancellation
- recovery sanitization, context-limit gating
- Ralph semantic DONE hardening, Atlas fallback persistence
- native-skill description/content, skill path traversal guard
- publish workflow: platform awaited via reusable workflow job
- release: version edits reapplied before commit/tag
- JSONC plugin migration: top-level plugin key safety
- cold-cache: user fallback models skip disconnected providers
- docs/version/release framing updates

Verified: bun test (4599 pass), tsc --noEmit clean, bun run build clean

src/hooks/tasks-todowrite-disabler/hook.ts

@@ -9,7 +9,7 @@ export interface TasksTodowriteDisablerConfig {
 export function createTasksTodowriteDisablerHook(
   config: TasksTodowriteDisablerConfig,
 ) {
-  const isTaskSystemEnabled = config.experimental?.task_system ?? false;
+  const isTaskSystemEnabled = config.experimental?.task_system ?? true;
 
   return {
     "tool.execute.before": async (

src/hooks/tasks-todowrite-disabler/index.test.ts

@@ -59,7 +59,7 @@ describe("tasks-todowrite-disabler", () => {
     })
   })
 
-  describe("when experimental.task_system is disabled or undefined", () => {
+  describe("when experimental.task_system is disabled", () => {
     test("should not block TodoWrite when flag is false", async () => {
       // given
       const hook = createTasksTodowriteDisablerHook({ experimental: { task_system: false } })
@@ -78,7 +78,7 @@ describe("tasks-todowrite-disabler", () => {
       ).resolves.toBeUndefined()
     })
 
-    test("should not block TodoWrite when experimental is undefined", async () => {
+    test("should block TodoWrite when experimental is undefined because task_system defaults to enabled", async () => {
       // given
       const hook = createTasksTodowriteDisablerHook({})
       const input = {
@@ -93,7 +93,7 @@ describe("tasks-todowrite-disabler", () => {
       // when / then
       await expect(
         hook["tool.execute.before"](input, output)
-      ).resolves.toBeUndefined()
+      ).rejects.toThrow("TodoRead/TodoWrite are DISABLED")
     })
 
     test("should not block TodoRead when flag is false", async () => {