/shannon:execute-plan - Execute Implementation Plan

Purpose

Systematic execution of implementation plans with Shannon's quantitative validation:

• ✅ Complexity-based batch sizing
• ✅ 3-tier validation gates per task
• ✅ NO MOCKS enforcement
• ✅ Quantitative progress tracking
• ✅ Review checkpoints between batches
• ✅ Pattern learning via Serena

Philosophy: Systematic execution + quantitative validation = reliable delivery.

---

Workflow

Step 1: Invoke executing-plans Skill

The command delegates all execution logic to the executing-plans skill:

Invoke sub-skill:
@skill executing-plans

Plan File: {plan_file_path}

The skill handles:

• Plan loading and validation
• Shannon metadata extraction
• Complexity-based batch calculation
• Task execution with TDD
• Validation gate enforcement
• Progress tracking
• Serena persistence

Step 2: Report Progress

After each batch, display Shannon quantitative report:

## Batch 3/9 Complete

**Shannon Metrics**:
- Tasks: 2/2 ✅
- Complexity: 0.58 (avg)
- Duration: 45 min (est: 40 min, +12%)
- Validation: 3/3 tiers PASS

**Tier 1 (Flow)**: ✅
- TypeScript: 0 errors
- Linter: 0 errors

**Tier 2 (Artifacts)**: ✅
- Tests: 24/24 pass (+12 new)
- Build: exit 0

**Tier 3 (Functional)**: ✅
- E2E: 6/6 pass
- NO MOCKS: ✅ (Puppeteer + real DB)

**Files Changed**: 3 (+190 lines)
**Commits**: 2

**Progress**: 33% complete (6/18 tasks)

**Ready for feedback.**

Step 3: Final Report

After all batches complete:

✅ Execution Complete - Shannon Verification

**Overall Metrics**:
- Tasks: 18/18 ✅
- Batches: 9
- Duration: 7.5 hours (est: 8-10h, -12.5%)
- Avg batch: 50 min

**Validation Summary**:
- Tier 1: 18/18 PASS
- Tier 2: 18/18 PASS
- Tier 3: 18/18 PASS
- NO MOCKS: ✅ Verified

**Code Metrics**:
- Files created: 12
- Files modified: 8
- Lines added: 1,247
- Commits: 18

**Complexity**: 0.59 actual (0.62 planned, simpler than expected)

**Saved to Serena**: execution/{execution_id}

**Ready for integration testing and deployment.**

---

Parameters

<plan_file>: Path to plan file (required unless --latest)
--latest: Use most recent plan from docs/plans/
--batch-size: Override complexity-based batch sizing
--auto: Skip review checkpoints (run all batches)
--tier: Validation tier level (1-3, default: 3)

---

Integration with Shannon CLI

# Shannon CLI code
async for message in sdk_client.query(
    prompt="/shannon:execute-plan docs/plans/feature.md",
    options=ClaudeAgentOptions(
        plugins=[{"type": "local", "path": "{shannon_framework_path}"}],
        setting_sources=["user", "project"]
    )
):
    # Command executes executing-plans skill
    # Returns quantitative progress updates

---

Examples

Systematic Execution with Review

/shannon:execute-plan docs/plans/2025-11-18-auth-system.md

# Executes with:
# - Complexity-based batching (plan complexity: 0.62 → batch size: 2)
# - Review checkpoints after each batch
# - Full 3-tier validation
# - Quantitative progress reports

Automatic Execution

/shannon:execute-plan docs/plans/simple-feature.md --auto

# Executes all batches without review checkpoints
# Still runs all validation gates
# Still tracks metrics in Serena

Latest Plan

/shannon:execute-plan --latest

# Finds most recent plan in docs/plans/
# Executes with standard workflow

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Integration with Other Commands

Requires:

• /shannon:write-plan - Creates the plan to execute

Uses during execution:

• /shannon:do - Can delegate individual tasks if needed
• Validation gates (automatic)
• Serena tracking (automatic)

Leads to:

• Integration testing
• Deployment
• Production release

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Status: Command complete, delegates to executing-plans skill