# Validation Report

**Document:** docs-bmad/sprint-artifacts/stories/3-9-create-binding-operation.context.xml
**Checklist:** .bmad/bmm/workflows/4-implementation/story-context/checklist.md
**Date:** 2026-02-12-084703
**Validator:** Bob (Scrum Master)

## Summary
- **Overall:** 10/10 passed (100%)
- **Critical Issues:** 0
- **Improvements Made:** 1 (constraints section enhanced)

## Section Results

### Story Context Assembly Checklist
Pass Rate: 10/10 (100%)

---

#### ✓ PASS - Story fields (asA/iWant/soThat) captured
**Evidence:** Lines 13-15
```xml
<asA>DevOps engineer</asA>
<iWant>to create bindings between exchanges and queues (or exchanges and exchanges)</iWant>
<soThat>I can define custom message routing rules for my applications</soThat>
```
All three required user story fields are present and clearly articulated.

---

#### ✓ PASS - Acceptance criteria list matches story draft exactly (no invention)
**Evidence:** Lines 29-39
Complete list of 9 acceptance criteria, each with specific test scenarios:
1. Create binding with routing key patterns
2. Destination type inference
3. Routing key wildcard support
4. Idempotency handling
5. Non-existent exchange error handling
6. Non-existent queue error handling
7. Invalid routing key validation
8. Performance target (<100ms)
9. Audit trail logging

No invented criteria detected - all align with RabbitMQ binding operation requirements.

---

#### ✓ PASS - Tasks/subtasks captured as task list
**Evidence:** Lines 16-26
9 implementation tasks with clear AC mappings:
- Task 1: Schema creation (AC #1, #2, #3, #7)
- Task 2: Operation class implementation (AC #1, #2, #4, #8)
- Task 3: Pre-creation validation (AC #5, #6, #7)
- Task 4: Idempotency handling (AC #4)
- Task 5: Conflict error handling (AC #5, #6)
- Task 6: Structured logging (AC #9)
- Task 7: Performance monitoring (AC #8)
- Task 8: MCP tool registration (AC All)
- Task 9: Integration testing (AC All)

All tasks map to specific acceptance criteria.

---

#### ✓ PASS - Relevant docs (5-15) included with path and snippets
**Evidence:** Lines 42-85
7 documentation artifacts included:
1. Epic Tech Spec - Binding Model section
2. Epic Tech Spec - Data Models (Pydantic)
3. Implementation Patterns - Operation Patterns
4. ADR-009 - Structured Logging
5. Story 3.8 - List Bindings learnings
6. Story 3.6 - Create Exchange patterns
7. Project Structure - Module organization

Each artifact includes:
- Full path
- Clear title
- Specific section reference
- Relevant snippet with context

Range: 7 docs (within 5-15 guideline)

---

#### ✓ PASS - Relevant code references included with reason and line hints
**Evidence:** Lines 87-150
9 code artifacts with complete metadata:
1. BindingInfo schema (lines 787-887) - Reuse existing model
2. CreateExchangeOperation (lines 1363-1687) - Pattern reference
3. ListBindingsOperation (lines 1932-2192) - Binding-specific patterns
4. CreateQueueOperation (lines 379-679) - Idempotency pattern
5. HTTPClientManager (lines 1-200) - HTTP client interface
6. ListExchangesOperation (lines 1122-1362) - Pre-validation
7. ListQueuesOperation (lines 50-378) - Pre-validation
8. Unit test patterns (lines 1-500) - Test structure
9. Integration test patterns (lines 1-800) - E2E testing

Each artifact includes:
- Full file path
- Kind (schema/operation/client/test)
- Symbol name
- Line number ranges
- Detailed reason for inclusion

---

#### ✓ PASS - Interfaces/API contracts extracted if applicable
**Evidence:** Lines 184-226
7 interfaces documented:
1. CreateBindingOperation.execute - Async method signature with request and correlation_id
2. RabbitMQ Management API - POST /api/bindings/{vhost}/e/{source}/q/{destination}
3. RabbitMQ Management API - POST /api/bindings/{vhost}/e/{source}/e/{destination}
4. HTTPClientManager.request - Async HTTP client method
5. CreateBindingRequest - Pydantic schema with all fields
6. BindingInfo - Pydantic response schema
7. MCP call-id tool - Tool protocol signature

All interfaces include:
- Name
- Kind (async method, REST endpoint, schema, tool)
- Full signature with types
- File path or external reference

---

#### ✓ PASS - Constraints include applicable dev rules and patterns
**Evidence:** Lines 163-186 (ENHANCED)
20 comprehensive constraints covering:
- **API Specs:** RabbitMQ Management API v3.13.x conformance
- **URL Encoding:** vhost and name encoding rules
- **Endpoints:** Binding creation paths for queue and exchange destinations
- **Request/Response:** Body format and HTTP status codes (201, 204, 404, 400)
- **Naming Rules:** Max 255 chars, allowed characters
- **Routing Key Validation:** Per exchange type (fanout, direct, topic, headers)
- **Pre-creation Validation:** Source and destination existence checks
- **Idempotency:** 204 No Content handling
- **Logging:** correlation_id and event naming conventions
- **Performance:** <100ms target with warnings
- **Audit Trail:** All CRUD events logged
- **Connection Pooling:** HTTPClientManager reuse
- **Testing Standards:** 80% coverage, unit + integration tests
- **Inheritance:** Base Operation class usage
- **Pattern Reuse:** Follow Story 3.6, reuse Story 3.8 schema
- **Error Parsing:** Extract reason from JSON response (ADDED)
- **Error Classification:** 400/404/409 error type mapping (ADDED)
- **Retry Logic:** No retries due to idempotency (ADDED)
- **Validation Strategy:** Validation-first approach (ADDED)
- **Transaction Safety:** Pre-validation failure handling (ADDED)

**Improvement Made:** Added 5 constraints for error handling patterns, retry logic clarification, validation strategy, and transaction safety based on CreateExchangeOperation pattern from Story 3.6.

---

#### ✓ PASS - Dependencies detected from manifests and frameworks
**Evidence:** Lines 151-160
6 Python dependencies listed with complete metadata:
1. pydantic >=2.0 - Schema validation
2. httpx >=0.27 - Async HTTP client
3. structlog >=24.0 - Structured logging
4. pytest >=8.0 - Testing framework
5. pytest-asyncio >=0.23 - Async test support
6. pytest-mock >=3.12 - Mock support

Each dependency includes:
- Package name
- Version constraint
- Purpose description

All dependencies align with project's pyproject.toml.

---

#### ✓ PASS - Testing standards and locations populated
**Evidence:** Lines 228-263
Comprehensive testing section includes:

**Standards:**
- Framework: pytest with async, mock, and coverage plugins
- Unit test requirements: Mock responses, schema validation, error handling, correlation_id tracking
- Integration test requirements: Real RabbitMQ with testcontainers, fixture management, E2E testing, performance verification
- Coverage target: Minimum 80%
- Reference: Story 3.8 patterns (35/35 tests, 100% pass rate)

**Locations:**
- tests/unit/rabbitmq_mcp_connection/operations/test_create_binding_operation.py
- tests/integration/test_binding_operations.py (extend existing)
- tests/unit/rabbitmq_mcp_connection/schemas/test_topology.py (extend)

**Ideas:**
20+ specific test scenarios covering:
- All 9 acceptance criteria
- Pre-creation validation flows
- Routing key validation per exchange type
- Exchange-to-exchange bindings
- URL encoding edge cases
- Error message parsing
- Correlation_id propagation
- MCP tool integration
- Message routing behavior verification

---

#### ✓ PASS - XML structure follows story-context template format
**Evidence:** Lines 1-265
Well-formed XML with all required sections:
- `<story-context>` root with id and version attributes
- `<metadata>` with epicId, storyId, title, status, timestamps
- `<story>` with asA/iWant/soThat and tasks
- `<acceptanceCriteria>` with numbered list
- `<artifacts>` containing:
  - `<docs>` with 7 artifacts
  - `<code>` with 9 artifacts
  - `<dependencies>` with Python packages
- `<constraints>` with 20 detailed rules
- `<interfaces>` with 7 API contracts
- `<tests>` with standards, locations, and ideas

XML is properly nested, uses consistent formatting, and follows the template structure exactly.

---

## Failed Items
None.

---

## Partial Items (Resolved)
**⚠ Constraints section** - Initially missing 5 critical error handling and pattern details.
- **What was missing:** Error response parsing strategy, error type classification, retry logic clarification, validation-first approach documentation, transaction safety notes
- **Resolution:** Added 5 new constraints (lines 181-185) covering error parsing from JSON "reason" field, error type classification (400/404/409), explicit no-retry justification due to idempotency, validation-first strategy, and transaction safety guarantees.
- **Impact:** Developers now have complete guidance on error handling patterns consistent with Story 3.6 CreateExchangeOperation pattern.

---

## Recommendations

### ✅ Must Fix (Completed)
1. ~~Add error handling pattern details to constraints~~ - **DONE**: Added 5 constraints for error parsing, classification, retry logic, validation strategy, and transaction safety.

### ✅ Quality Achieved
The story context now provides:
- **Complete Specifications:** All 10 checklist items pass validation
- **Developer-Ready:** Clear interfaces, constraints, and error handling patterns
- **Testable:** Comprehensive test ideas mapped to acceptance criteria
- **Consistent:** Follows established patterns from Stories 3.6 and 3.8
- **Maintainable:** Reuses existing schemas and patterns, no duplication

### 💡 Optional Enhancements (Not Required)
Consider for future stories:
1. Add performance benchmarks from similar operations (Story 3.6 timing data)
2. Include example Management API response bodies for 201/204/404 scenarios
3. Add sequence diagram for validation-first flow with pre-creation checks

---

## Conclusion
**Story 3-9-create-binding-operation.context.xml is now READY FOR DEV** with 100% checklist compliance. The constraint section was enhanced with critical error handling patterns from Story 3.6, ensuring developers have complete implementation guidance. No blocking issues remain.

**Next Steps:**
1. Story can be assigned to developer (dev agent)
2. Implementation should follow constraints and reference patterns from:
   - Story 3.6: CreateExchangeOperation pattern
   - Story 3.8: BindingInfo schema (reuse, do not recreate)
   - ADR-009: Structured logging with correlation_id
3. Expected deliverables: CreateBindingOperation class, CreateBindingRequest schema, unit tests, integration tests, MCP tool registration

---
**Validated by:** Bob (Scrum Master)
**Timestamp:** 2026-02-12T08:47:03Z
