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name: Claude Code X - Autonomous Execution Subagent description: Execute Claude Code autonomously in the background for well-defined tasks, enabling parallel execution of up to 5 concurrent sessions while the user continues other work. allowed-tools: Bash, Task, Edit, Read, Write, Grep, Glob

Claude Code X - Autonomous Execution Subagent

Type: Task Execution Agent Mode: Background Autonomous Version: 1.0.0

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🎯 Purpose

Execute Claude Code autonomously in the background for well-defined tasks, enabling parallel execution of up to 5 concurrent sessions while the user continues other work.

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🚀 When to Use This Skill

✅ Use When:

• You have 3+ independent, well-defined tasks
• Tasks don't require user interaction during execution
• You want to maximize throughput with parallel execution
• User can benefit from multitasking during execution
• Tasks follow clear patterns (e.g., similar Issues)

❌ Don't Use When:

• Task requires user decisions during execution
• Requirements are unclear or exploratory
• Task has complex dependencies on other running tasks
• Immediate interactive feedback is needed

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📋 Capabilities

Core Features

• Parallel Execution: Run up to 5 Claude Code sessions concurrently
• Session Management: JSON-based persistence and lifecycle tracking
• Background Operation: Non-blocking, allows user to continue other work
• Timeout Control: Configurable timeout (default 10 minutes)
• Result Retrieval: Access full output logs after completion
• Session Monitoring: Check status and progress in real-time

Session Lifecycle

1. Spawn: Create new background Claude Code session
2. Execute: Run task autonomously with specified tools
3. Monitor: Check status and output
4. Complete: Retrieve results and clean up

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🛠️ Usage

Basic Execution

CopyPlease use the Claude Code X skill to execute the following task in the background:

"Implement logging for the authentication module in crates/miyabi-auth/src/lib.rs"

Parallel Batch Execution

CopyUse Claude Code X to execute these 5 tasks in parallel:

1. Add logging to crates/miyabi-auth/src/lib.rs
2. Add logging to crates/miyabi-database/src/lib.rs
3. Add logging to crates/miyabi-api/src/lib.rs
4. Add logging to crates/miyabi-cache/src/lib.rs
5. Add logging to crates/miyabi-worker/src/lib.rs

Monitor their progress and report when all are complete.

With Custom Configuration

CopyUse Claude Code X with:
- Timeout: 15 minutes
- Tools: Bash, Read, Write, Edit, Grep
- Task: "Refactor error handling in crates/miyabi-core/src/errors.rs"

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🎬 Implementation Instructions

When this skill is invoked, execute the following steps:

Step 1: Validate Task

Check that the task is:

• Well-defined with clear success criteria
• Independent (no dependencies on user input)
• Suitable for autonomous execution

If unclear, ask user for clarification before proceeding.

Step 2: Execute with Shell Script

Use the claude-code-x.sh shell script:

Copy# Execute task
./.claude/commands/claude-code-x.sh exec "Task description here"

# Optional: Custom configuration
./.claude/commands/claude-code-x.sh exec "Task description" \
  --timeout 900 \
  --tools "Bash,Read,Write,Edit,Glob,Grep"

Step 3: Capture Session ID

The script will output:

Copy✅ Session started successfully
🔗 Session ID: claude-code-x-20251027-123456-abc123
🔗 PID: 12345

Store this session ID for monitoring.

Step 4: Monitor Progress (Optional)

During execution, you can check status:

Copy# Check status
./.claude/commands/claude-code-x.sh status claude-code-x-20251027-123456-abc123

# List all sessions
./.claude/commands/claude-code-x.sh sessions

Step 5: Retrieve Results

After completion, get full output:

Copy./.claude/commands/claude-code-x.sh result claude-code-x-20251027-123456-abc123

Step 6: Report to User

Provide summary:

• Session ID
• Execution time
• Exit code (0 = success)
• Files modified
• Any issues encountered

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📊 Best Practices

Task Breakdown

CopyGood Task:
"Add comprehensive logging to crates/miyabi-auth/src/lib.rs:
- Log all function entries/exits
- Log all errors with context
- Use tracing::info!, tracing::error!
- Include test coverage"

Bad Task:
"Fix the auth module" (too vague)
"Implement OAuth" (needs user decisions)

Parallel Execution Strategy

Pattern 1: Similar Tasks (Ideal)

CopyTask 1: Add logging to module A
Task 2: Add logging to module B  
Task 3: Add logging to module C
Task 4: Add logging to module D
Task 5: Add logging to module E

→ All 5 tasks in parallel (max efficiency)

Pattern 2: Phased Execution (Good)

CopyPhase 1 (parallel): Infrastructure setup tasks
  - Task 1: Create config struct
  - Task 2: Add database schema
  - Task 3: Implement Redis cache

Phase 2 (interactive): Critical logic (use regular Claude Code)

Phase 3 (parallel): Provider implementations
  - Task 4: Google provider
  - Task 5: GitHub provider
  - Task 6: Discord provider

Error Handling

If a session fails:

1. Check the log file for error details
2. Determine if it's retryable
3. Fix any issues (e.g., missing files)
4. Re-execute with corrected task description

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🔍 Session Management Commands

List Active Sessions

Copy./.claude/commands/claude-code-x.sh sessions

Check Session Status

Copy./.claude/commands/claude-code-x.sh status <session-id>

Get Full Results

Copy./.claude/commands/claude-code-x.sh result <session-id>

Kill Running Session

Copy./.claude/commands/claude-code-x.sh kill <session-id>

Cleanup Old Sessions

Copy./.claude/commands/claude-code-x.sh cleanup

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⚙️ Configuration

Environment Variables

Copy# Session directory (default: .ai/sessions/claude-code-x)
export CLAUDE_CODE_X_SESSION_DIR=".ai/sessions/claude-code-x"

# Log directory (default: $SESSION_DIR/logs)
export CLAUDE_CODE_X_LOG_DIR="$SESSION_DIR/logs"

# Max concurrent sessions (default: 5)
export CLAUDE_CODE_X_MAX_SESSIONS=5

# Default timeout in seconds (default: 600 = 10 minutes)
export CLAUDE_CODE_X_TIMEOUT=600

Default Tools

The following tools are enabled by default:

• Bash (command execution)
• Read (file reading)
• Write (file writing)
• Edit (file editing)
• Glob (file pattern matching)
• Grep (content search)

Permission Mode

• Default: acceptEdits (auto-accept file edits)
• Can be changed to ask for approval prompts

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📈 Performance Characteristics

Speed

• Overhead: ~2-3 seconds per session spawn
• Execution: Similar to interactive Claude Code
• Parallel: Up to 5x throughput with 5 concurrent sessions

Resource Usage

• Memory: ~200MB per session
• Disk: ~1MB per session log
• CPU: Minimal (most time spent in AI inference)

Limits

• Max Sessions: 5 concurrent (configurable)
• Max Timeout: 10 minutes default (configurable up to 30 min)
• Log Retention: Logs persist until manual cleanup

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🎓 Examples

Example 1: Single Task

User Request: "Add logging to the auth module"

Agent Action:

Copy./.claude/commands/claude-code-x.sh exec \
  "Add comprehensive logging to crates/miyabi-auth/src/lib.rs:
  - Log all function entries/exits with tracing::info!
  - Log all errors with tracing::error!
  - Include request IDs in log context
  - Add tests for logging behavior"

Agent Response:

Copy✅ Started Claude Code X session: claude-code-x-20251027-100000-abc123
📝 Executing task in background (timeout: 10 minutes)
💡 Monitor with: /claude-code-x status claude-code-x-20251027-100000-abc123

I'll check back in 2 minutes to see progress.

Example 2: Parallel Batch

User Request: "Add logging to all 5 core modules"

Agent Action:

Copy# Launch 5 parallel sessions
./.claude/commands/claude-code-x.sh exec "Add logging to crates/miyabi-auth/src/lib.rs"
./.claude/commands/claude-code-x.sh exec "Add logging to crates/miyabi-database/src/lib.rs"
./.claude/commands/claude-code-x.sh exec "Add logging to crates/miyabi-api/src/lib.rs"
./.claude/commands/claude-code-x.sh exec "Add logging to crates/miyabi-cache/src/lib.rs"
./.claude/commands/claude-code-x.sh exec "Add logging to crates/miyabi-worker/src/lib.rs"

Agent Response:

Copy✅ Started 5 parallel Claude Code X sessions:
1. claude-code-x-20251027-100000-abc123 (auth)
2. claude-code-x-20251027-100015-def456 (database)
3. claude-code-x-20251027-100030-ghi789 (api)
4. claude-code-x-20251027-100045-jkl012 (cache)
5. claude-code-x-20251027-100100-mno345 (worker)

Estimated completion: ~5 minutes
I'll monitor progress and report when all complete.

Example 3: Phased Hybrid

User Request: "Implement OAuth 2.0 authentication"

Agent Action (Pattern 3: Hybrid Orchestration):

CopyPhase 1: Planning (Interactive)
- Breaking down OAuth into discrete tasks...

Phase 2: Infrastructure (Claude Code X - Parallel)
- Spawning 3 sessions for config, DB, Redis...

Phase 3: Core Flow (Interactive)
- Implementing security-critical OAuth flow interactively...

Phase 4: Providers (Claude Code X - Parallel)
- Spawning 3 sessions for Google, GitHub, Discord providers...

Phase 5: Testing (Interactive)
- Reviewing all code and creating integration tests...

Result: 42 minutes (30% faster than all-interactive)

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🔗 Related Documentation

• Implementation: CLAUDE_CODE_X_IMPLEMENTATION_GUIDE.md
• Workflow: OPTIMAL_MIYABI_WORKFLOW_WITH_CODEX_CLAUDE.md
• Pattern 3 Example: PATTERN3_HYBRID_EXAMPLE.md
• Command Reference: .claude/commands/claude-code-x.md

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🐛 Troubleshooting

Session Won't Start

Error: Maximum concurrent sessions (5) reached

Solution:

Copy# List active sessions
./.claude/commands/claude-code-x.sh sessions

# Kill inactive sessions or wait for completion
./.claude/commands/claude-code-x.sh kill <session-id>

# Or cleanup old sessions
./.claude/commands/claude-code-x.sh cleanup

Session Timeout

Error: Session times out before completion

Solution:

Copy# Increase timeout for complex tasks
./.claude/commands/claude-code-x.sh exec "Complex task" --timeout 1200

Session Fails

Check logs:

Copy./.claude/commands/claude-code-x.sh result <session-id>

Common issues:

• Missing files → Add file creation to task description
• Dependency errors → Ensure dependencies are available
• Unclear task → Make task description more specific

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📊 Success Metrics

Track these metrics to evaluate Claude Code X effectiveness:

• Time Savings: Compare total execution time vs sequential
• Success Rate: Percentage of sessions completing successfully
• Parallelization Factor: Average concurrent sessions used
• Task Clarity: Percentage requiring clarification before execution

Target Metrics:

• Time Savings: >25%
• Success Rate: >90%
• Parallelization: 3-5 concurrent sessions
• Task Clarity: <10% requiring clarification

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Version: 1.0.0 Created: 2025-10-27 Author: Claude Code (Sonnet 4.5) Status: ✅ Production Ready