fix: resolve publish blockers for v3.7.4→v3.8.0 release

- Fix #1991 crash: optional chaining for task-history sessionID access
- Fix #1992 think-mode: add antigravity entries to HIGH_VARIANT_MAP
- Fix #1949 Copilot premium misattribution: use createInternalAgentTextPart
- Fix #1982 load_skills: pass directory to discoverSkills for project-level skills
- Fix command priority: sort scopePriority before .find(), project-first return
- Fix Google provider transform: apply in userFallbackModels path
- Fix ralph-loop TUI: optional chaining for event handler
- Fix runtime-fallback: unify dual fallback engines, remove HTTP 400 from retry,
  fix pendingFallbackModel stuck state, add priority gate to skip model-fallback
  when runtime-fallback is active
- Fix Prometheus task system: exempt from todowrite/todoread deny
- Fix background_output: default full_session to true
- Remove orphan hooks: hashline-edit-diff-enhancer (redundant with hashline_edit
  built-in diff), task-reminder (dead code)
- Remove orphan config entries: 3 stale hook names from Zod schema
- Fix disabled_hooks schema: accept arbitrary strings for forward compatibility
- Register json-error-recovery hook in tool-guard pipeline
- Add disabled_hooks gating for question-label-truncator, task-resume-info,
  claude-code-hooks
- Update test expectations to match new behavior

src/plugin/hooks/create-transform-hooks.ts

@@ -14,7 +14,7 @@ import {
 import { safeCreateHook } from "../../shared/safe-create-hook"
 
 export type TransformHooks = {
-  claudeCodeHooks: ReturnType<typeof createClaudeCodeHooksHook>
+  claudeCodeHooks: ReturnType<typeof createClaudeCodeHooksHook> | null
   keywordDetector: ReturnType<typeof createKeywordDetectorHook> | null
   contextInjectorMessagesTransform: ReturnType<typeof createContextInjectorMessagesTransformHook>
   thinkingBlockValidator: ReturnType<typeof createThinkingBlockValidatorHook> | null
@@ -30,14 +30,21 @@ export function createTransformHooks(args: {
   const { ctx, pluginConfig, isHookEnabled } = args
   const safeHookEnabled = args.safeHookEnabled ?? true
 
-  const claudeCodeHooks = createClaudeCodeHooksHook(
-    ctx,
-    {
-      disabledHooks: (pluginConfig.claude_code?.hooks ?? true) ? undefined : true,
-      keywordDetectorDisabled: !isHookEnabled("keyword-detector"),
-    },
-    contextCollector,
-  )
+  const claudeCodeHooks = isHookEnabled("claude-code-hooks")
+    ? safeCreateHook(
+        "claude-code-hooks",
+        () =>
+          createClaudeCodeHooksHook(
+            ctx,
+            {
+              disabledHooks: (pluginConfig.claude_code?.hooks ?? true) ? undefined : true,
+              keywordDetectorDisabled: !isHookEnabled("keyword-detector"),
+            },
+            contextCollector,
+          ),
+        { enabled: safeHookEnabled },
+      )
+    : null
 
   const keywordDetector = isHookEnabled("keyword-detector")
     ? safeCreateHook(