| name | coding-agent |
| description | Incremental development agent with TDD workflow. Use when implementing features one at a time, following test-driven development, making commits, or resuming development work. |
| version | 1.0.0 |
| category | autonomous-coding |
| layer | core-workflow |
Coding Agent
Incremental development agent that implements features using test-driven development (TDD) in subsequent sessions after initialization.
Quick Start
Start a Coding Session
from scripts.coding_agent import CodingAgent
agent = CodingAgent(project_dir)
context = await agent.start_session()
print(f"Session {context.iteration} started")
Implement Next Feature
feature = await agent.select_next_feature()
result = await agent.implement_feature(feature)
if result.success:
await agent.mark_feature_complete(feature)
await agent.commit_work(f"Implement: {feature.description}")
Session Protocol
┌─────────────────────────────────────────────────────────────┐
│ CODING SESSION PROTOCOL │
├─────────────────────────────────────────────────────────────┤
│ │
│ 1. RESTORE CONTEXT │
│ ├─ Read claude-progress.txt (quick state) │
│ ├─ Read feature_list.json (work remaining) │
│ └─ Get git log (recent commits) │
│ │
│ 2. ENVIRONMENT CHECK │
│ ├─ Run init.sh if needed │
│ ├─ Verify server running │
│ └─ Run smoke tests │
│ │
│ 3. SELECT FEATURE │
│ ├─ Get highest-priority incomplete feature │
│ ├─ Read feature steps │
│ └─ Plan implementation │
│ │
│ 4. IMPLEMENT WITH TDD │
│ ├─ Write failing test │
│ ├─ Verify test fails │
│ ├─ Implement code │
│ ├─ Verify test passes │
│ └─ Verify E2E (if applicable) │
│ │
│ 5. MARK COMPLETE │
│ ├─ Update feature_list.json (passes: true) │
│ └─ IMPORTANT: Features only go false → true │
│ │
│ 6. COMMIT WORK │
│ ├─ git add relevant files │
│ ├─ Descriptive commit message │
│ └─ Reference feature ID │
│ │
│ 7. UPDATE PROGRESS │
│ ├─ Append to claude-progress.txt │
│ └─ List accomplishments and blockers │
│ │
│ 8. END SESSION │
│ ├─ Leave code in mergeable state │
│ └─ Auto-continue or shutdown │
│ │
└─────────────────────────────────────────────────────────────┘
TDD Workflow
┌─────────────────────────────────────────────────────────────┐
│ TDD CYCLE │
├─────────────────────────────────────────────────────────────┤
│ │
│ ┌──────────┐ │
│ │ 1. RED │ Write failing test │
│ └────┬─────┘ │
│ │ Test fails ✓ │
│ ▼ │
│ ┌──────────┐ │
│ │ 2. GREEN │ Write minimal code to pass │
│ └────┬─────┘ │
│ │ Test passes ✓ │
│ ▼ │
│ ┌──────────┐ │
│ │3.REFACTOR│ Clean up without breaking tests │
│ └────┬─────┘ │
│ │ All tests pass ✓ │
│ ▼ │
│ ┌──────────┐ │
│ │ 4. E2E │ Verify in browser (if needed) │
│ └────┬─────┘ │
│ │ Feature works ✓ │
│ ▼ │
│ COMMIT │
│ │
└─────────────────────────────────────────────────────────────┘
Key Rules
- ONE FEATURE PER SESSION: Focus prevents context exhaustion
- TEST FIRST: Always write test before implementation
- VERIFY BEFORE MARKING: Feature must actually pass
- DESCRIPTIVE COMMITS: Reference feature ID and explain changes
- MERGEABLE STATE: Code should always be in working state
Commit Message Format
<type>: <description>
<body - what and why>
Feature: <feature-id>
Example:
feat: implement user signup with email validation
- Added SignupForm component with validation
- Created /api/auth/signup endpoint
- Added email verification check
- Tests: 8 passing
Feature: auth-001
Integration Points
- autonomous-session-manager: Detects CONTINUE session
- context-state-tracker: Provides and updates state
- security-sandbox: Validates commands
- progress-tracker: Tracks completion metrics
References
references/CODING-WORKFLOW.md - Detailed workflowreferences/TDD-PATTERNS.md - TDD best practicesreferences/COMMIT-CONVENTIONS.md - Commit guidelines
Scripts
scripts/coding_agent.py - Main CodingAgent classscripts/feature_selector.py - Feature prioritizationscripts/implementation_workflow.py - TDD implementationscripts/commit_workflow.py - Git commit workflow
