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-generator/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: skill-generator
 description: Meta-skill for creating new Claude Code skills with configurable execution modes. Supports sequential (fixed order) and autonomous (stateless) phase patterns. Use for skill scaffolding, skill creation, or building new workflows. Triggers on "create skill", "new skill", "skill generator".
-allowed-tools: Task, AskUserQuestion, Read, Bash, Glob, Grep, Write
+allowed-tools: Agent, AskUserQuestion, Read, Bash, Glob, Grep, Write
 ---
 
 # Skill Generator

.claude/skills/skill-generator/phases/03-phase-generation.md

@@ -240,7 +240,7 @@ async function executePhase(phaseId, phaseConfig, workDir) {
   const phasePrompt = Read(\`\${skillDir}/phases/\${phaseId}.md\`);
 
   // Use Task to invoke Agent
-  const result = await Task({
+  const result = await Agent({
     subagent_type: phaseConfig.agent?.type || 'universal-executor',
     run_in_background: phaseConfig.agent?.run_in_background || false,
     prompt: \`
@@ -573,7 +573,7 @@ async function runOrchestrator(workDir) {
     try {
       const actionPrompt = Read(\`\${skillDir}/phases/actions/\${actionId}.md\`);
 
-      const result = await Task({
+      const result = await Agent({
         subagent_type: 'universal-executor',
         run_in_background: false,
         prompt: \`

.claude/skills/skill-generator/specs/cli-integration.md

@@ -12,7 +12,7 @@ Suitable for scenarios that need immediate results.
 
 ```javascript
 // Agent call - synchronous
-const result = Task({
+const result = Agent({
   subagent_type: 'universal-executor',
   prompt: 'Execute task...',
   run_in_background: false  // Key: synchronous execution
@@ -77,7 +77,7 @@ ccw cli -p "<PROMPT>" --tool <gemini|qwen|codex> --mode <analysis|write>
 General-purpose executor, the most commonly used agent type.
 
 ```javascript
-Task({
+Agent({
   subagent_type: 'universal-executor',
   prompt: `
 Execute task:
@@ -99,7 +99,7 @@ Execute task:
 Code exploration agent for quick codebase understanding.
 
 ```javascript
-Task({
+Agent({
   subagent_type: 'Explore',
   prompt: `
 Explore src/ directory:
@@ -123,7 +123,7 @@ Thoroughness: medium
 Deep code analysis agent.
 
 ```javascript
-Task({
+Agent({
   subagent_type: 'cli-explore-agent',
   prompt: `
 Deep analysis of src/auth/ module:

.claude/skills/skill-generator/templates/autonomous-orchestrator.md

@@ -111,7 +111,7 @@ async function runOrchestrator() {
     try {
       const actionPrompt = Read(\`phases/actions/${actionId}.md\`);
 
-      const result = await Task({
+      const result = await Agent({
         subagent_type: 'universal-executor',
         run_in_background: false,
         prompt: \`

.claude/skills/skill-generator/templates/code-analysis-action.md

@@ -96,7 +96,7 @@ async function execute${toPascalCase(id)}(context) {
   \` : '// No MCP tools configured'}
 
   // 3. Launch Agent for in-depth analysis
-  const agentResult = await Task({
+  const agentResult = await Agent({
     subagent_type: '\${agent.type}',
     prompt: \`
 \${generateAgentPrompt(analysis_type, scope)}
@@ -408,7 +408,7 @@ const semanticContext = await mcp__ace_tool__search_context({
 });
 
 // Use semantic search results as Agent input context
-const agentResult = await Task({
+const agentResult = await Agent({
   subagent_type: 'Explore',
   prompt: \`
 Based on following semantic search results, perform in-depth analysis:

.claude/skills/skill-generator/templates/sequential-phase.md

@@ -274,7 +274,7 @@ const tasks = [
 \`\`\`javascript
 const results = await Promise.all(
   tasks.map(task =>
-    Task({
+    Agent({
       subagent_type: 'universal-executor',
       run_in_background: false,
       prompt: task.prompt

.claude/skills/skill-generator/templates/skill-md.md

@@ -223,7 +223,7 @@ function filterDocsByPhase(specs, phase, phaseIndex) {
 ---
 name: api-docs-generator
 description: Generate API documentation from source code. Triggers on "generate api docs", "api documentation".
-allowed-tools: Task, Read, Write, Glob, Grep, Bash
+allowed-tools: Agent, Read, Write, Glob, Grep, Bash
 ---
 
 # API Docs Generator
@@ -265,7 +265,7 @@ Phase 3: Generation      → api-docs.md
 ---
 name: task-manager
 description: Interactive task management with CRUD operations. Triggers on "manage tasks", "task list".
-allowed-tools: Task, AskUserQuestion, Read, Write
+allowed-tools: Agent, AskUserQuestion, Read, Write
 ---
 
 # Task Manager