Agent Patterns

Sprint coordinates multiple specialized agents through structured communication patterns. This skill covers the SPAWN REQUEST format, report structure, parallel execution, and inter-agent coordination.

Agent Hierarchy

┌─────────────────────────────────────┐
│         Sprint Orchestrator         │
│    (parses requests, spawns agents) │
└─────────────────┬───────────────────┘
                  │
                  ▼
┌─────────────────────────────────────┐
│        Project Architect            │
│  (plans, creates specs, coordinates)│
└─────────────────┬───────────────────┘
                  │ SPAWN REQUEST
                  ▼
┌─────────────────────────────────────┐
│      Implementation & Test Agents   │
│   (execute, report, never spawn)    │
└─────────────────────────────────────┘

Key rule: Only the orchestrator spawns agents. Agents communicate by returning structured messages.

SPAWN REQUEST Format

The architect requests agent spawning using a specific format:

## SPAWN REQUEST

- python-dev
- nextjs-dev
- cicd-agent

Parsing Rules

The orchestrator parses SPAWN REQUEST blocks:

• Section must start with ## SPAWN REQUEST on its own line
• Each agent listed as a bullet point
• Multiple agents spawn in parallel

Implementation Agents

Request during Phase 2:

## SPAWN REQUEST

- python-dev
- nextjs-dev

Never include test agents in implementation requests.

Testing Agents

Request during Phase 3:

## SPAWN REQUEST

- qa-test-agent
- ui-test-agent

The ui-test-agent runs in AUTOMATED or MANUAL mode based on specs.md:

• UI Testing Mode: automated (default) → runs test scenarios automatically
• UI Testing Mode: manual → opens browser for user to test, waits for tab close

Agent Report Format

All agents return structured reports. The orchestrator saves these as files.

Standard Report Sections

Every report includes:

Example: Backend Report

## BACKEND REPORT

### CONFORMITY STATUS: YES

### SUMMARY
Implemented user authentication endpoints per api-contract.md.

### FILES CHANGED
- backend/app/routers/auth.py (new)
- backend/app/models/user.py (modified)
- backend/app/schemas/auth.py (new)
- backend/alembic/versions/001_add_users.py (new)

### DEVIATIONS
None.

### ISSUES
None.

### NOTES FOR ARCHITECT
- Consider adding rate limiting middleware in next sprint
- Password hashing uses bcrypt (industry standard)

Example: QA Report

## QA REPORT

### SUITE STATUS
- New test files: 2
- Updated test files: 1
- Test framework(s): pytest
- Test command(s): pytest tests/api/

### API CONFORMITY STATUS: YES

### SUMMARY
- Total endpoints in contract: 5
- Endpoints covered by automated tests: 5
- Endpoints with failing tests: 0

### FAILURES AND DEVIATIONS
None.

### TEST EXECUTION
- Tests run: YES
- Result: ALL PASS
- Notes: 23 tests passed in 1.4s

### NOTES FOR ARCHITECT
- Added edge case tests for password validation

Example: UI Test Report

## UI TEST REPORT

### MODE
AUTOMATED

### SUMMARY
- Total tests run: 8
- Passed: 7
- Failed: 1
- Session duration: 45s

### COVERAGE
- Scenarios covered:
  - Login with valid credentials
  - Login with invalid password
  - Registration flow
  - Password reset request
- Not covered (yet):
  - Email verification flow (requires email testing setup)

### FAILURES
- Scenario: Registration validation
  - Path/URL: /register
  - Symptom: Error message not displayed
  - Expected: "Email already exists" message
  - Actual: Form submits without feedback

### CONSOLE ERRORS
None.

### NOTES FOR ARCHITECT
- Registration error handling needs frontend fix

Parallel Execution

Implementation Agents

Spawn all implementation agents simultaneously:

Task: python-dev     ─────────▶ Backend Report
Task: nextjs-dev     ─────────▶ Frontend Report
Task: cicd-agent     ─────────▶ CICD Report

Use a single message with multiple Task tool calls.

Testing Agents

QA runs first, then UI tests:

Task: qa-test-agent  ─────────▶ QA Report
                                    │
                                    ▼
Task: ui-test-agent  ─────────▶ UI Test Report
Task: diagnostics    ─────────▶ Diagnostics Report
     (parallel with ui-test)

UI test and diagnostics agents run in parallel with each other.

Agent Constraints

What Agents Can Do

• Read specification files
• Read project-map.md (read-only)
• Implement code in their domain
• Run tests in their domain
• Return structured reports

What Agents Cannot Do

• Spawn other agents
• Modify status.md (architect only)
• Modify project-map.md (architect only)
• Create methodology documentation
• Push to git repositories

File-Based Coordination

When agents need to coordinate beyond reports:

Report Files

Orchestrator saves reports as:

.claude/sprint/[N]/[slug]-report-[iteration].md

Slugs:

• python-dev → backend
• nextjs-dev → frontend
• qa-test-agent → qa
• ui-test-agent → ui-test

Specialized Agent Roles

Project Architect

The decision-maker:

• Creates specification files
• Maintains project-map.md and status.md
• Analyzes agent reports
• Decides next steps (implement, test, finalize)

Implementation Agents

Technology-specific builders:

• python-dev: Python/FastAPI backend
• nextjs-dev: Next.js frontend
• cicd-agent: CI/CD pipelines
• allpurpose-agent: Any other technology

Testing Agents

Quality validators:

• qa-test-agent: API and unit tests
• ui-test-agent: Browser-based E2E tests
• Framework-specific diagnostics agents

FINALIZE Signal

The architect signals sprint completion:

FINALIZE
Phase 5 complete. Sprint [N] is finalized.

The orchestrator detects this and exits the iteration loop.

Best Practices

Report Quality

• Keep reports concise
• Focus on actionable information
• No verbose logs or stack traces
• Summarize, don't dump

Parallel Efficiency

• Spawn independent agents together
• Don't wait unnecessarily

Spec Adherence

• Always read specs before implementing
• Report deviations with justification
• Follow API contracts exactly

Additional Resources

For detailed agent definitions and report formats, see the agent files in the plugin's agents/ directory.