refactor: replace Task tool with Agent tool and fix schema compliance

## Task -> Agent Replacement
- Replace all Task({}) calls with Agent({}) across .claude/ directory
- Update allowed-tools declarations from Task to Agent
- Update documentation references from "Task tool" to "Agent tool"

## Schema Compliance Fixes

### Agent Schema
- Add missing required `description` parameter in 6 files
- Add missing `run_in_background: false` for subagent calls
- Add missing `subagent_type` parameter

### AskUserQuestion Schema
- Fix issue-manage/SKILL.md: reduce options from 5 to 4 (max allowed)

### SendMessage Schema
- Fix team-worker.md: use correct params (type, content, summary)
- Remove invalid `team_name` parameter

### TaskCreate/TaskUpdate Schema
- Remove invalid `blockedBy`, `owner`, `status` from TaskCreate calls
- Use separate TaskUpdate calls for dependencies and ownership
- Fix TaskUpdate syntax to use object parameter

### TeamDelete Schema
- Remove parameters from TeamDelete() calls (should be no params)

### TaskOutput Schema
- Fix Python-style syntax to JavaScript object syntax

## Files Changed
- 146 files updated across commands/, skills/, skills_lib/, agents/

.claude/skills/skill-tuning/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: skill-tuning
 description: Universal skill diagnosis and optimization tool. Detect and fix skill execution issues including context explosion, long-tail forgetting, data flow disruption, and agent coordination failures. Supports Gemini CLI for deep analysis. Triggers on "skill tuning", "tune skill", "skill diagnosis", "optimize skill", "skill debug".
-allowed-tools: Task, AskUserQuestion, Read, Write, Bash, Glob, Grep, mcp__ace-tool__search_context
+allowed-tools: Agent, AskUserQuestion, Read, Write, Bash, Glob, Grep, mcp__ace-tool__search_context
 ---
 
 # Skill Tuning

.claude/skills/skill-tuning/phases/actions/action-diagnose-agent.md

@@ -193,7 +193,7 @@ async function execute(state, workDir) {
       type: 'agent_failure',
       severity: 'medium',
       location: { file: 'SKILL.md' },
-      description: 'Task tool used but not declared in allowed-tools',
+      description: 'Agent tool used but not declared in allowed-tools',
       evidence: [`${totalCalls} Task calls found, but Task not in allowed-tools`],
       root_cause: 'Tool declaration mismatch',
       impact: 'May cause runtime permission issues',

.claude/skills/skill-tuning/phases/actions/action-propose-fixes.md

@@ -216,7 +216,7 @@ async function execute(state, workDir) {
           file: 'phases/*.md',
           action: 'modify',
           diff: `+ try {
-    const result = await Task({...});
+    const result = await Agent({...});
 +   if (!result) throw new Error('Empty result');
 + } catch (e) {
 +   updateState({ errors: [...errors, e.message], error_count: error_count + 1 });

.claude/skills/skill-tuning/phases/orchestrator.md

@@ -99,8 +99,9 @@ async function runOrchestrator(workDir) {
         target_skill: { name: state.target_skill.name, path: state.target_skill.path }
       };
 
-      const result = await Task({
+      const result = await Agent({
         subagent_type: 'universal-executor',
+        description: `Execute skill-tuning action: ${actionId}`,
         run_in_background: false,
         prompt: `
 [CONTEXT]

.claude/skills/skill-tuning/specs/skill-authoring-principles.md

@@ -114,18 +114,21 @@ Write(`${workDir}/final-output.json`, finalResult);  // 只存最终结果
 // 上下文流转模式
 async function executePhase(context) {
   const { previousResult, constraints, config } = context;
-  
-  const result = await Task({
+
+  const result = await Agent({
+    subagent_type: 'universal-executor',
+    description: 'Execute phase with context passing',
+    run_in_background: false,
     prompt: `
       [CONTEXT]
       Previous: ${JSON.stringify(previousResult)}
       Constraints: ${constraints.join(', ')}
-      
+
       [TASK]
       Process and return result directly.
     `
   });
-  
+
   return {
     ...context,
     currentResult: result,

.claude/skills/skill-tuning/specs/tuning-strategies.md

@@ -140,8 +140,10 @@ function updateHistory(state, newItem) {
 
 ```javascript
 // Add summarization before passing to next phase
-const summary = await Task({
+const summary = await Agent({
   subagent_type: 'universal-executor',
+  description: 'Summarize content for context compression',
+  run_in_background: false,
   prompt: `Summarize in <100 words: ${fullContent}\nReturn JSON: { summary, key_points[] }`
 });
 nextPhasePrompt = `Previous summary: ${summary.summary}`;
@@ -268,12 +270,17 @@ function validateAgentResult(result, requiredFields) {
 ### flatten_nesting
 
 ```javascript
-// Before: Agent A's prompt tells it to call Task({subagent_type: 'B'})
+// Before: Agent A's prompt tells it to call Agent({subagent_type: 'B'})
 // After: Agent A returns signal, orchestrator handles
 // Agent A: return { needs_agent_b: true, context: {...} }
 // Orchestrator:
 if (parsedA.needs_agent_b) {
-  resultB = await Task({ subagent_type: 'B', prompt: `Context: ${parsedA.context}` });
+  resultB = await Agent({
+    subagent_type: 'B',
+    description: 'Handle delegated task from Agent A',
+    run_in_background: false,
+    prompt: `Context: ${parsedA.context}`
+  });
 }
 ```