# Validation Report: Story Context 1-7-mcp-server-foundation-json-rpc-20

**Document:** `docs-bmad/sprint-artifacts/stories/1-7-mcp-server-foundation-json-rpc-20.context.xml`  
**Checklist:** `.bmad/bmm/workflows/4-implementation/story-context/checklist.md`  
**Date:** 2025-12-29T09:58:04Z  
**Validator:** Bob (Scrum Master)  
**Status:** ✅ ALL ISSUES FIXED - Ready for Dev

---

## Summary

- **Overall:** 10/10 passed (100%)
- **Critical Issues:** 0 (all fixed)
- **Improvements Applied:** 4 enhancements

---

## Section Results

### Story Context Completeness
**Pass Rate:** 10/10 (100%)

#### ✓ PASS: Story fields (asA/iWant/soThat) captured
**Evidence:** Lines 13-15 contain complete story statement
```xml
<asA>an AI assistant</asA>
<iWant>to connect to the MCP server via stdio transport using JSON-RPC 2.0 protocol</iWant>
<soThat>I can discover and execute RabbitMQ operations through the Model Context Protocol</soThat>
```
**Match:** Perfect alignment with story draft lines 7-9

#### ✓ PASS: Acceptance criteria list matches story draft exactly (no invention)
**Evidence:** Lines 30-37 list all 7 ACs with accurate descriptions
```xml
AC1: JSON-RPC 2.0 Protocol Implementation
AC2: MCP Protocol Methods
AC3: Tool Registration
AC4: Error Code Implementation
AC5: Stdio Transport
AC6: Server Startup Performance
AC7: Graceful Shutdown
```
**Match:** All ACs from story file lines 13-57, no additions or omissions

#### ✓ PASS: Tasks/subtasks captured as task list
**Evidence:** Lines 16-27 enumerate 10 tasks with AC mappings
```xml
- Task 1: MCP Server Core Structure (AC: #1, #2, #5, #6)
- Task 2: JSON-RPC 2.0 Message Handling (AC: #1, #4)
...
- Task 10: Documentation and CLI (AC: #6)
```
**Coverage:** All 10 tasks from story file lines 61-159

#### ✓ PASS: Relevant docs (5-15) included with path and snippets
**Evidence:** Lines 42-107 contain 11 documentation references:
1. epic-1-foundation-mcp-protocol.md (Story 1.7 context)
2. tech-spec-epic-1.md (Services/Modules)
3. tech-spec-epic-1.md (MCP Protocol Interface)
4. tech-spec-epic-1.md (Server Startup Sequence)
5. architecture/implementation-patterns.md (Module Structure)
6. architecture/adrs.md (ADR-002: 3-Tool Pattern)
7. architecture/adrs.md (ADR-005: Stateless Design)
8. architecture/adrs.md (ADR-009: Structured Logging)
9. architecture/consistency-rules.md (Async Patterns)
10. architecture/technology-stack-details.md (Type Safety)
11. 1-6-semantic-embeddings-generation.md (Startup Pattern)

**Quality:** All snippets relevant to MCP server foundation, protocol implementation, and startup sequence

#### ✓ PASS: Relevant code references included with reason and line hints
**Evidence:** Lines 109-187 contain 11 code artifacts:
1. src/config/logging.py (structlog foundation)
2. src/tools/search_ids.py (tool registry reference) ✨ ENHANCED
3. src/tools/get_id.py (tool registry reference) ✨ ENHANCED
4. src/tools/call_id.py (tool registry reference) ✨ ENHANCED
5. src/tools/vector_db/embeddings.py (data loading)
6. src/tools/openapi/operation_registry.py (operation loading)
7. data/operations.json (runtime artifact)
8. data/embeddings.json (runtime artifact)
9. pyproject.toml (dependencies)
10. tests/unit/test_embeddings.py (test patterns)
11. tests/unit/test_tools_search_ids.py (test patterns)

**Reason Quality:** Each artifact includes clear justification for inclusion and usage context

#### ✓ PASS: Interfaces/API contracts extracted if applicable
**Evidence:** Lines 217-272 define 9 interfaces:
1. JSON-RPC 2.0 Request (protocol)
2. JSON-RPC 2.0 Success Response (protocol)
3. JSON-RPC 2.0 Error Response (protocol) ✨ ENHANCED with error codes
4. MCP initialize method ✨ CLARIFIED as TO BE CREATED
5. MCP tools/list method ✨ CLARIFIED as TO BE CREATED
6. MCP tools/call method ✨ CLARIFIED as TO BE CREATED
7. get_logger(name: str) (existing)
8. load_embeddings(path: str) (existing)
9. load_registry(path: str) (existing)

**Completeness:** Protocol messages, MCP methods, and utility functions all documented

#### ✓ PASS: Constraints include applicable dev rules and patterns
**Evidence:** Lines 201-214 list 14 constraints:
- Python 3.12+ requirement
- Strict mypy type checking
- Async/await patterns
- Import order (isort)
- Naming conventions
- Error handling patterns
- Logging to stderr only
- Startup performance (<1s)
- Stateless design
- JSON-RPC protocol compliance
- MCP protocol version
- Tool stub limitation

**Coverage:** Architecture patterns, coding standards, performance targets, protocol requirements

#### ✓ PASS: Dependencies detected from manifests and frameworks
**Evidence:** Lines 188-198 list 7 Python packages:
- mcp >=1.0.0 (MCP SDK)
- pydantic >=2.0 (validation)
- pydantic-settings >=2.0 (config)
- structlog >=24.1 (logging)
- httpx >=0.27 (HTTP client)
- pytest >=8.0 (testing)
- pytest-asyncio >=0.23 (async tests)

**Accuracy:** All versions match pyproject.toml lines 23-37

#### ✓ PASS: Testing standards and locations populated
**Evidence:** Lines 275-310 comprehensive test coverage:
- **Standards** (lines 275-277): Unit tests, integration tests, performance tests, >80% coverage, pytest/pytest-asyncio
- **Locations** (lines 278-281): tests/unit/ and tests/integration/ with specific test types
- **Test Ideas** (lines 282-310): 29 specific test cases covering all 7 ACs

**Quality:** Explicit test cases for each acceptance criterion with clear validation points

#### ✓ PASS: XML structure follows story-context template format
**Evidence:** Complete XML structure with all required sections:
```xml
<story-context>
  <metadata> ✓
  <story> ✓
  <acceptanceCriteria> ✓
  <artifacts>
    <docs> ✓
    <code> ✓
    <dependencies> ✓
  </artifacts>
  <constraints> ✓
  <interfaces> ✓
  <tests> ✓
</story-context>
```

**Validation:** Well-formed XML, all sections present, proper nesting

---

## Issues Fixed

### 🔧 Issue 1: Incorrect sourceStoryPath
**Location:** Line 9  
**Problem:** Path pointed to `docs-bmad/sprint-artifacts/1-7-mcp-server-foundation-json-rpc-20.md` (missing `/stories/` subdirectory)  
**Fix Applied:** Updated to `docs-bmad/sprint-artifacts/stories/1-7-mcp-server-foundation-json-rpc-20.md`  
**Impact:** Critical - ensures story context can reference source story for validation

### 🔧 Issue 2: Interface paths ambiguous for new files
**Location:** Lines 240, 246, 252 (MCP protocol methods)  
**Problem:** Paths showed `src/mcp_server/server.py` without clarifying file doesn't exist yet  
**Fix Applied:** Added "(TO BE CREATED IN THIS STORY)" suffix to all three interface paths  
**Impact:** Medium - prevents developer confusion about what exists vs. what to create

### 🔧 Issue 3: Tool artifact descriptions incomplete
**Location:** Lines 118-135 (search_ids, get_id, call_id)  
**Problem:** Didn't clarify relationship between existing tools and story 1.7 stub wrappers  
**Fix Applied:** 
- Changed `kind` to include "(EXISTING - reference for tool registry)"
- Enhanced `reason` to explicitly state "Story 1.7 creates STUB wrapper, full implementation already exists"  
**Impact:** Medium - critical clarity for implementation approach (stubs vs. full implementations)

### 🔧 Issue 4: Error response interface missing details
**Location:** Line 230-234  
**Problem:** JSON-RPC error response interface lacked specific error code documentation  
**Fix Applied:** Added `<details>` element with all 5 error codes and their meanings:
- -32700 (Parse), -32600 (Invalid Request), -32601 (Method Not Found), -32602 (Invalid Params), -32000 (Server Error)  
**Impact:** Medium - provides quick reference for AC #4 implementation

---

## Recommendations

### ✅ Must Fix (Complete)
All critical issues have been resolved:
1. ✅ Source story path corrected
2. ✅ Interface creation status clarified
3. ✅ Tool stub pattern documented
4. ✅ Error codes detailed

### ✅ Should Improve (Complete)
All enhancements applied:
1. ✅ Tool artifact context enhanced
2. ✅ Interface documentation improved
3. ✅ Error code reference added

### 💡 Consider (Optional)
Minor enhancements for future stories (NOT blocking):
1. Add diagram reference for MCP protocol flow (when diagram exists)
2. Add cross-reference to stories 1.8, 1.9, 1.10 for full tool implementations
3. Consider adding performance benchmark baseline from story 1.6

---

## Validation Checklist Score

| Criterion | Status | Notes |
|-----------|--------|-------|
| Story fields captured | ✅ PASS | Complete asA/iWant/soThat |
| AC list matches draft | ✅ PASS | All 7 ACs present |
| Tasks captured | ✅ PASS | 10 tasks with AC mappings |
| Relevant docs (5-15) | ✅ PASS | 11 docs with snippets |
| Code references | ✅ PASS | 11 artifacts with reasons |
| Interfaces extracted | ✅ PASS | 9 interfaces documented |
| Constraints included | ✅ PASS | 14 constraints listed |
| Dependencies detected | ✅ PASS | 7 packages with versions |
| Testing standards | ✅ PASS | Standards + 29 test ideas |
| XML template format | ✅ PASS | Valid structure |

**Final Score: 10/10 (100%)**

---

## Conclusion

✅ **Story context is COMPLETE and READY FOR DEVELOPMENT**

All validation criteria met. The story context provides comprehensive information for implementing the MCP Server Foundation:
- Clear story definition and acceptance criteria
- Detailed task breakdown with AC traceability
- Rich documentation and code artifact references
- Well-defined interfaces and constraints
- Comprehensive testing guidance

**No blockers remain.** Developer can proceed with confidence using this context.

---

**Validated by:** Bob (Scrum Master)  
**Validation Method:** Manual checklist validation per `.bmad/bmm/workflows/4-implementation/story-context/checklist.md`  
**Quality Assurance:** All fixes verified against story draft and architecture documents
