feat: complete implementation plan for Mock GDS MCP server

Phase 0 (Research):
- Selected MCP SDK (@modelcontextprotocol/sdk) for protocol compliance
- Chose ioredis for Valkey client (Redis-compatible)
- Minimal dependencies: Pino logging, native test runner
- Docker buildx bake for multi-platform builds
- Embedded mock data with deterministic generation
- PNR format: TEST-{BASE32} for safety

Phase 1 (Design):
- Data model: 8 core entities (Session, PNR, FlightSegment, etc.)
- MCP contracts: 8 tools with JSON schemas
- Quickstart guide with complete workflow examples
- Constitution compliance verified

Technical stack:
- Node.js 20 LTS
- Valkey 8.0+ for persistence
- Docker containers (amd64/arm64)
- Performance: <2s search, 50+ concurrent sessions

Ready for task generation with /speckit.tasks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

specs/001-mock-gds-server/checklists/requirements.md

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+# Specification Quality Checklist: Mock GDS MCP Server
+
+**Purpose**: Validate specification completeness and quality before proceeding to planning  
+**Created**: 2025-01-22  
+**Feature**: [spec.md](../spec.md)
+
+## Content Quality
+
+- [x] No implementation details (languages, frameworks, APIs)
+- [x] Focused on user value and business needs
+- [x] Written for non-technical stakeholders
+- [x] All mandatory sections completed
+
+## Requirement Completeness
+
+- [x] No [NEEDS CLARIFICATION] markers remain
+- [x] Requirements are testable and unambiguous
+- [x] Success criteria are measurable
+- [x] Success criteria are technology-agnostic (no implementation details)
+- [x] All acceptance scenarios are defined
+- [x] Edge cases are identified
+- [x] Scope is clearly bounded
+- [x] Dependencies and assumptions identified
+
+## Feature Readiness
+
+- [x] All functional requirements have clear acceptance criteria
+- [x] User scenarios cover primary flows
+- [x] Feature meets measurable outcomes defined in Success Criteria
+- [x] No implementation details leak into specification
+
+## Validation Summary
+
+**Status**: ✅ PASSED
+
+All checklist items have been validated:
+
+### Content Quality
+- ✅ Specification is technology-agnostic - no mention of specific programming languages, frameworks, databases, or implementation technologies
+- ✅ All content focuses on WHAT users need (testing/demos) and WHY (development efficiency, reliable workflows)
+- ✅ Written in plain language suitable for stakeholders - uses business terms (developers, QA teams, sales demos) rather than technical jargon
+- ✅ All mandatory sections (User Scenarios, Requirements, Success Criteria, Assumptions) are complete and detailed
+
+### Requirement Completeness
+- ✅ Zero [NEEDS CLARIFICATION] markers - all requirements are fully specified with concrete details
+- ✅ Each functional requirement is testable - FR-002 can be tested by executing searches with specified parameters and verifying outputs; FR-009 can be tested by running concurrent sessions and checking for data leakage
+- ✅ All success criteria include specific metrics (SC-001: 30 seconds, SC-002: 50 concurrent sessions, SC-003: under 2 seconds, SC-004: 100% valid codes)
+- ✅ Success criteria are technology-agnostic - no implementation details (e.g., SC-001 measures workflow completion time, not "API response time")
+- ✅ 5 user stories with 15 total acceptance scenarios covering all major workflows (flight booking, multi-service, car rental, session isolation, demo data)
+- ✅ 8 edge cases identified covering error scenarios (invalid codes, cancelled bookings, session expiry, validation failures)
+- ✅ Scope clearly bounded in Assumptions section - defines what's included (major airports, common workflows) and excluded (comprehensive airport coverage, complex fare rules, production use)
+- ✅ 12 assumptions documented covering data scope, pricing, payment handling, session management, and target users
+
+### Feature Readiness
+- ✅ Each FR has corresponding acceptance scenarios - FR-002 (flight search) maps to User Story 1 acceptance scenario 1; FR-009 (session isolation) maps to User Story 4 scenarios
+- ✅ User scenarios cover all primary flows: basic flight booking (P1), multi-service bundling (P2), complete packages (P3), concurrent testing (P2), demo scenarios (P3)
+- ✅ Success criteria align with feature goals: rapid workflow completion (SC-001), concurrent session support (SC-002), realistic data quality (SC-004, SC-006), testing effectiveness (SC-005, SC-008)
+- ✅ No implementation leakage detected - specification never mentions MCP implementation details, data storage mechanisms, or specific tool implementations
+
+## Notes
+
+Specification is ready for next phase. Can proceed directly to `/speckit.plan` for implementation planning, or optionally run `/speckit.clarify` if additional stakeholder input is desired (though no clarifications are currently needed).