Codebase MCP Server

# Requirements Quality Checklist: Connection Management **Feature**: Production-Grade Connection Management **Branch**: `009-v2-connection-mgmt` **Created**: 2025-10-13 **Purpose**: Comprehensive requirements quality audit for author self-review before spec finalization **Checklist Type**: All dimensions with complete risk coverage **Focus Areas**: Performance Requirements, Reliability & Resilience, API Contract Quality, Observability & Monitoring, Configuration Management, Resource Management, Error Handling, Security & Access Control **Audience**: Author (self-review) **Usage Context**: Spec refinement before declaring requirements complete --- ## Category 1: Requirement Completeness **Purpose**: Validate that all necessary requirements are documented - [ ] **CHK001** - Are initialization requirements complete for all pool states (INITIALIZING → HEALTHY, INITIALIZING → UNHEALTHY failure paths)? [Completeness, Spec §FR-001] - [ ] **CHK002** - Are connection validation requirements specified for all validation failure scenarios (timeout, network error, invalid response)? [Completeness, Spec §FR-002] - [ ] **CHK003** - Are automatic reconnection requirements complete for all reconnection outcomes (success, max retries exceeded, permanent failure)? [Completeness, Spec §FR-003] - [ ] **CHK004** - Are pool statistics requirements documented for all tracked metrics (connection counts, timing metrics, error history)? [Completeness, Spec §FR-004] - [ ] **CHK005** - Are graceful shutdown requirements complete for all shutdown scenarios (clean shutdown, forced shutdown after timeout, shutdown with pending requests)? [Completeness, Spec §FR-005] - [ ] **CHK006** - Are leak detection requirements specified for all leak scenarios (genuine leaks, long-running queries, false positives)? [Completeness, Spec §FR-006] - [ ] **CHK007** - Are configuration validation requirements complete for all invalid configurations (min_size > max_size, negative timeouts, invalid database URL)? [Completeness, Spec §FR-007] - [ ] **CHK008** - Are health check integration requirements documented for all health states (healthy, degraded, unhealthy with specific triggers)? [Completeness, Spec §FR-008] - [ ] **CHK009** - Are connection recycling requirements complete for all recycling conditions (max_queries exceeded, max_lifetime reached, max_idle_time exceeded)? [Completeness, Spec §FR-009] - [ ] **CHK010** - Are concurrency requirements specified for all concurrent access patterns (multiple acquisitions, concurrent statistics queries, concurrent shutdown)? [Completeness, Spec §FR-010] - [ ] **CHK011** - Are requirements defined for zero-state scenarios (no connections available, all connections failed validation)? [Gap, Edge Case Coverage] - [ ] **CHK012** - Are requirements specified for partial connectivity scenarios (some connections healthy, some failed)? [Gap, Degraded State Coverage] - [ ] **CHK013** - Are recovery requirements documented for all failure recovery paths (recovery from unhealthy, recovery from degraded, recovery after shutdown abort)? [Gap, Recovery Flow] - [ ] **CHK014** - Are logging requirements complete for all lifecycle events (initialization, acquisition, release, recycling, errors, shutdown)? [Gap, Observability] - [ ] **CHK015** - Are error message requirements specified (format, actionability, context inclusion)? [Gap, Error Handling] --- ## Category 2: Requirement Clarity **Purpose**: Validate that requirements are specific and unambiguous - [ ] **CHK016** - Is "initialize successfully" in FR-001 quantified with specific criteria (minimum connections established, validation queries passed, state transition completed)? [Clarity, Spec §FR-001] - [ ] **CHK017** - Is "lightweight validation query" in FR-002 explicitly specified (exact query: "SELECT 1", expected result, timeout threshold)? [Clarity, Spec §FR-002] - [ ] **CHK018** - Are exponential backoff intervals in FR-003 precisely defined with jitter behavior (fixed intervals vs. with randomization)? [Clarity, Spec §FR-003] - [ ] **CHK019** - Is "real-time" in FR-004 quantified with data staleness threshold (<1ms per SC-007)? [Clarity, Spec §FR-004] - [ ] **CHK020** - Is "waits up to 30 seconds" in FR-005 clarified with polling interval behavior (continuous wait vs. periodic check)? [Clarity, Spec §FR-005] - [ ] **CHK021** - Is "configurable timeout" in FR-006 specified with default value, minimum/maximum bounds, and configuration mechanism? [Clarity, Spec §FR-006] - [ ] **CHK022** - Are "detailed error messages" in FR-007 defined with specific content requirements (problem description, suggested action, context data)? [Clarity, Spec §FR-007] - [ ] **CHK023** - Are health status thresholds in FR-008 precisely defined (healthy: ≥80% idle, degraded: 50-79%, unhealthy: <50% or 0 connections)? [Clarity, Spec §FR-008] - [ ] **CHK024** - Are recycling trigger values in FR-009 all specified with defaults and configurability (max_queries=50000, max_lifetime=3600s, max_idle_time=60s)? [Clarity, Spec §FR-009] - [ ] **CHK025** - Is "safe for concurrent access" in FR-010 clarified with specific concurrency mechanism (async locks, atomic operations, FIFO queue)? [Clarity, Spec §FR-010] - [ ] **CHK026** - Is "fail fast" in FR-007 defined with specific behavior (immediate exception, no retry, pre-initialization check)? [Clarity, Configuration Validation] - [ ] **CHK027** - Is "force-closes" in FR-005 specified with cleanup behavior (connection state on force-close, resource release guarantees)? [Clarity, Shutdown Behavior] - [ ] **CHK028** - Are "actionable suggestions" in FR-007 exemplified with concrete examples for common error cases? [Clarity, Error Message Quality] - [ ] **CHK029** - Is "degraded" health status clearly differentiated from "unhealthy" with distinct triggers and recovery paths? [Clarity, Spec §FR-008] - [ ] **CHK030** - Is "validation fails" in FR-002 defined with exhaustive list of failure conditions? [Clarity, Validation Behavior] --- ## Category 3: Requirement Consistency **Purpose**: Validate that requirements align without conflicts - [ ] **CHK031** - Are initialization timeout (2s per SC-001) and connection validation timeout (5ms per FR-002 description) consistent with each other (2s allows ~400 validations at 5ms each)? [Consistency, Spec §FR-001, §FR-002] - [ ] **CHK032** - Is health check latency requirement (10ms per SC-003) consistent with "no database query" statement in FR-004 (both achievable if statistics are in-memory)? [Consistency, Spec §FR-004, §FR-008] - [ ] **CHK033** - Is automatic reconnection timeout (30s per SC-004) consistent with exponential backoff schedule (1s+2s+4s+8s+16s = 31s total for 5 attempts)? [Consistency, Spec §FR-003, §SC-004] - [ ] **CHK034** - Are graceful shutdown timeout (30s per FR-005) and command_timeout (60s default per PoolConfig) consistent (active queries may exceed shutdown timeout)? [Conflict, Spec §FR-005, Data Model] - [ ] **CHK035** - Is leak detection timeout (30s default per FR-006) consistent with command_timeout (60s default) to avoid false positives on long queries? [Consistency, Spec §FR-006, Configuration] - [ ] **CHK036** - Are "FIFO connection acquisition queuing" (FR-010) and "waiting_requests counter" (FR-004) consistent with same queuing mechanism? [Consistency, Spec §FR-004, §FR-010] - [ ] **CHK037** - Is pool shrinking behavior (US-003 acceptance scenario 4) consistent with min_size constraint (pool never shrinks below min_size)? [Consistency, Spec §US-003, §FR-001] - [ ] **CHK038** - Are connection recycling triggers (FR-009) consistent with connection lifetime tracking requirements (need to track query_count, lifetime, idle_time per connection)? [Consistency, Implementation Feasibility] - [ ] **CHK039** - Is health status calculation (FR-008) consistent with pool statistics availability (FR-004) for determining capacity ratios? [Consistency, Dependencies] - [ ] **CHK040** - Are configuration validation requirements (FR-007) consistent with environment variable support mentioned in PoolConfig entity? [Consistency, Configuration Sources] --- ## Category 4: Acceptance Criteria Quality **Purpose**: Validate that success criteria are measurable and testable - [ ] **CHK041** - Can "pool initialization completes in under 2 seconds (p95)" (SC-001) be objectively measured with time.perf_counter() instrumentation? [Measurability, Spec §SC-001] - [ ] **CHK042** - Can "connection acquisition overhead under 10ms (p95)" (SC-002) be isolated from query execution time for measurement? [Measurability, Spec §SC-002] - [ ] **CHK043** - Can "health check responds in under 10ms (p99)" (SC-003) be verified with realistic concurrent load to capture p99 scenarios? [Measurability, Spec §SC-003] - [ ] **CHK044** - Can "automatic reconnection within 30 seconds (p95)" (SC-004) be tested with controlled database outage/recovery simulation? [Measurability, Spec §SC-004] - [ ] **CHK045** - Can "graceful shutdown within 30 seconds (p99)" (SC-005) be measured including resource cleanup verification? [Measurability, Spec §SC-005] - [ ] **CHK046** - Can "no connection leaks over 24-hour operation" (SC-006) be verified with memory profiler tracking connection object lifecycle? [Measurability, Spec §SC-006] - [ ] **CHK047** - Can "under 1ms data staleness" (SC-007) be measured comparing pool statistics to actual asyncpg pool state? [Measurability, Spec §SC-007] - [ ] **CHK048** - Can "100 concurrent requests without deadlock" (SC-008) be tested with deterministic concurrent workload generator? [Measurability, Spec §SC-008] - [ ] **CHK049** - Can "no crashes during database outages" (SC-009) be verified with chaos engineering testing (kill -9 postgres during operation)? [Measurability, Spec §SC-009] - [ ] **CHK050** - Can "actionable log messages" (SC-010) be evaluated with objective criteria (includes problem, cause, solution)? [Measurability, Spec §SC-010] - [ ] **CHK051** - Can "under 100MB memory consumption" (SC-011) be measured with memory_profiler for max_size=10 pool under defined load? [Measurability, Spec §SC-011] - [ ] **CHK052** - Can "under 200ms startup overhead" (SC-012) be isolated from total server startup time? [Measurability, Spec §SC-012] - [ ] **CHK053** - Can "health check sustains >1000 req/s" (SC-013) be tested with realistic load generator without artificial optimizations? [Measurability, Spec §SC-013] - [ ] **CHK054** - Are all success criteria (SC-001 to SC-013) accompanied by clear measurement methodology in quickstart.md scenarios? [Traceability, Test Coverage] - [ ] **CHK055** - Are threshold values in success criteria (2s, 10ms, 30s, etc.) justified based on user impact or industry benchmarks? [Acceptance Criteria, Rationale] --- ## Category 5: Scenario Coverage - Primary Flows **Purpose**: Validate requirements for primary user workflows - [ ] **CHK056** - Are requirements complete for normal pool initialization flow (US-001 acceptance scenarios 1-4)? [Coverage, Primary Flow, Spec §US-001] - [ ] **CHK057** - Are requirements complete for normal connection acquisition and release cycle (primary workflow steps 6-9)? [Coverage, Primary Flow, Spec §Primary Workflow] - [ ] **CHK058** - Are requirements complete for normal health monitoring flow (US-003 acceptance scenario 1)? [Coverage, Primary Flow, Spec §US-003] - [ ] **CHK059** - Are requirements complete for normal graceful shutdown flow (primary workflow steps 11-12)? [Coverage, Primary Flow, Spec §Primary Workflow] - [ ] **CHK060** - Are requirements complete for normal connection recycling flow (query count threshold reached)? [Coverage, Primary Flow, Spec §FR-009] --- ## Category 6: Scenario Coverage - Alternate Flows **Purpose**: Validate requirements for alternative execution paths - [ ] **CHK061** - Are requirements complete for pool initialization with min_size < max_size (pool scales up under load)? [Coverage, Alternate Flow, Spec §FR-001] - [ ] **CHK062** - Are requirements complete for connection acquisition when pool is at max_size (queuing behavior)? [Coverage, Alternate Flow, Alternative Paths §IF connection acquisition exceeds max_size] - [ ] **CHK063** - Are requirements complete for health check when pool is in degraded state (partial connectivity)? [Coverage, Alternate Flow, Spec §FR-008] - [ ] **CHK064** - Are requirements complete for graceful shutdown with idle pool (no active queries)? [Coverage, Alternate Flow, Spec §FR-005] - [ ] **CHK065** - Are requirements complete for connection recycling triggered by lifetime expiration (not query count)? [Coverage, Alternate Flow, Spec §FR-009] --- ## Category 7: Scenario Coverage - Exception/Error Flows **Purpose**: Validate requirements for error and exception scenarios - [ ] **CHK066** - Are requirements complete for pool initialization failure due to database unavailable? [Coverage, Exception Flow, Spec §FR-001, Edge Case] - [ ] **CHK067** - Are requirements complete for connection validation failure (SELECT 1 returns unexpected result)? [Coverage, Exception Flow, Spec §FR-002] - [ ] **CHK068** - Are requirements complete for connection acquisition timeout (no connection available within timeout)? [Coverage, Exception Flow, Alternative Paths §IF connection acquisition exceeds max_size] - [ ] **CHK069** - Are requirements complete for database connectivity lost during active query execution? [Coverage, Exception Flow, Edge Cases, US-002] - [ ] **CHK070** - Are requirements complete for configuration validation errors (invalid parameter combinations)? [Coverage, Exception Flow, Spec §FR-007] - [ ] **CHK071** - Are requirements complete for graceful shutdown timeout exceeded with active connections remaining? [Coverage, Exception Flow, Spec §FR-005] - [ ] **CHK072** - Are requirements complete for leak detection false positives (legitimate long queries)? [Coverage, Exception Flow, US-004 Acceptance Scenario 4] - [ ] **CHK073** - Are requirements complete for health check failure (pool state unreadable)? [Gap, Exception Flow] - [ ] **CHK074** - Are requirements complete for concurrent shutdown requests (idempotency)? [Gap, Exception Flow] - [ ] **CHK075** - Are requirements complete for connection recycling failure (cannot create replacement connection)? [Gap, Exception Flow] --- ## Category 8: Scenario Coverage - Recovery Flows **Purpose**: Validate requirements for recovery from error states - [ ] **CHK076** - Are requirements complete for recovery from UNHEALTHY state to HEALTHY (automatic reconnection success)? [Coverage, Recovery Flow, Spec §FR-003, US-002] - [ ] **CHK077** - Are requirements complete for recovery from DEGRADED state to HEALTHY (capacity restored)? [Coverage, Recovery Flow, Spec §FR-008] - [ ] **CHK078** - Are requirements complete for recovery from connection exhaustion (connections released, queue drained)? [Coverage, Recovery Flow, Alternative Paths] - [ ] **CHK079** - Are requirements complete for recovery from validation failures (connection recycled, new connection validated)? [Coverage, Recovery Flow, Spec §FR-002] - [ ] **CHK080** - Are requirements complete for recovery from leak detection warnings (connection eventually released, warning cleared)? [Coverage, Recovery Flow, US-004 Acceptance Scenario 3] - [ ] **CHK081** - Are requirements complete for recovery after reconnection max retries exceeded (continue attempting every 16s)? [Coverage, Recovery Flow, Spec §FR-003] - [ ] **CHK082** - Are requirements complete for recovery from SHUTTING_DOWN aborted (transition back to operational state)? [Gap, Recovery Flow] - [ ] **CHK083** - Are requirements complete for recovery from partial database connectivity (some connections fail, others succeed)? [Gap, Recovery Flow, Edge Cases] --- ## Category 9: Scenario Coverage - Non-Functional Requirements **Purpose**: Validate requirements for performance, reliability, security, observability - [ ] **CHK084** - Are performance requirements specified for all critical operations (initialization, acquisition, health check, reconnection, shutdown)? [Coverage, Non-Functional, Success Criteria §SC-001 to §SC-005] - [ ] **CHK085** - Are reliability requirements specified for continuous operation (no leaks, no crashes, no deadlocks)? [Coverage, Non-Functional, Success Criteria §SC-006, §SC-008, §SC-009] - [ ] **CHK086** - Are observability requirements specified for all lifecycle events (structured logging, pool statistics, health checks)? [Coverage, Non-Functional, Spec §FR-004, §FR-008, §SC-010] - [ ] **CHK087** - Are resource management requirements specified (memory consumption, connection limits, cleanup guarantees)? [Coverage, Non-Functional, Spec §SC-011, §FR-009] - [ ] **CHK088** - Are scalability requirements specified (concurrent request handling, throughput targets)? [Coverage, Non-Functional, Spec §SC-008, §SC-013] - [ ] **CHK089** - Are startup performance requirements specified (initialization time, startup overhead)? [Coverage, Non-Functional, Spec §SC-001, §SC-012] - [ ] **CHK090** - Are security requirements specified for database credentials (secure storage, no logging of passwords)? [Gap, Non-Functional, Security] - [ ] **CHK091** - Are requirements specified for connection SSL/TLS handling (encryption enforcement, certificate validation)? [Gap, Non-Functional, Security] - [ ] **CHK092** - Are requirements specified for audit logging (who, what, when for sensitive operations)? [Gap, Non-Functional, Security/Compliance] --- ## Category 10: Edge Case Coverage **Purpose**: Validate requirements address boundary conditions - [ ] **CHK093** - Are requirements defined for min_size=0 configuration (lazy initialization, no prewarm)? [Edge Case, Configuration Bounds] - [ ] **CHK094** - Are requirements defined for min_size=max_size configuration (fixed pool size, no scaling)? [Edge Case, Configuration Bounds] - [ ] **CHK095** - Are requirements defined for max_size=1 configuration (serial connection access)? [Edge Case, Configuration Bounds] - [ ] **CHK096** - Are requirements defined for very large max_size (100+) configurations (memory impact, initialization time)? [Edge Case, Configuration Bounds] - [ ] **CHK097** - Are requirements defined for zero timeout configuration (immediate failure, no waiting)? [Edge Case, Configuration Bounds] - [ ] **CHK098** - Are requirements defined for very large timeout configuration (hours/days)? [Edge Case, Configuration Bounds] - [ ] **CHK099** - Are requirements defined for leak_detection_timeout=0 (disable leak detection)? [Edge Case, Configuration Bounds, Spec §FR-006] - [ ] **CHK100** - Are requirements defined for database connectivity lost immediately after initialization? [Edge Case, Timing Condition] - [ ] **CHK101** - Are requirements defined for rapid shutdown request immediately after initialization? [Edge Case, Timing Condition] - [ ] **CHK102** - Are requirements defined for all connections fail validation simultaneously? [Edge Case, Complete Failure] - [ ] **CHK103** - Are requirements defined for database server restart during reconnection attempts? [Edge Case, Race Condition] - [ ] **CHK104** - Are requirements defined for connection returned to pool after pool shutdown initiated? [Edge Case, Lifecycle Ordering] - [ ] **CHK105** - Are requirements defined for statistics queried during pool state transition (RECOVERING → HEALTHY)? [Edge Case, Concurrency] --- ## Category 11: Configuration Requirements Quality **Purpose**: Validate configuration-related requirements are complete and clear - [ ] **CHK106** - Are all PoolConfig fields documented with purpose, default value, valid range, and impact of changing? [Completeness, Data Model §PoolConfig] - [ ] **CHK107** - Are configuration validation rules specified for all fields (min/max bounds, format requirements, cross-field constraints)? [Completeness, Spec §FR-007] - [ ] **CHK108** - Are environment variable names specified for all configurable parameters (POOL_MIN_SIZE, POOL_MAX_SIZE, etc.)? [Completeness, Data Model §PoolConfig] - [ ] **CHK109** - Is configuration precedence specified (environment variables vs. config file vs. defaults)? [Gap, Configuration Sources] - [ ] **CHK110** - Are requirements defined for configuration reload/hot-reload (or explicit statement that changes require restart)? [Gap, Configuration Lifecycle] - [ ] **CHK111** - Are requirements defined for configuration validation error messages (which field failed, why, suggested fix)? [Clarity, Spec §FR-007] - [ ] **CHK112** - Is configuration immutability specified (frozen after initialization per PoolConfig.frozen=True)? [Clarity, Data Model §PoolConfig] - [ ] **CHK113** - Are requirements defined for database_url format validation (protocol, host, port, database)? [Completeness, Spec §FR-007] - [ ] **CHK114** - Are requirements defined for sensitive configuration handling (password redaction in logs)? [Gap, Security] - [ ] **CHK115** - Are default configuration values justified based on typical workload or best practices? [Rationale, Configuration Defaults] --- ## Category 12: Observability & Monitoring Requirements Quality **Purpose**: Validate observability requirements enable effective operations - [ ] **CHK116** - Are logging requirements specified for all lifecycle state transitions (INITIALIZING → HEALTHY → DEGRADED → UNHEALTHY → RECOVERING)? [Completeness, Spec §FR-004, §SC-010] - [ ] **CHK117** - Are log message format requirements specified (structured JSON, timestamp, level, context fields)? [Clarity, Observability] - [ ] **CHK118** - Are requirements defined for log retention and rotation (file size limits, backup count)? [Gap, Observability] - [ ] **CHK119** - Are requirements defined for log level configuration (DEBUG, INFO, WARNING, ERROR, CRITICAL)? [Gap, Observability] - [ ] **CHK120** - Are pool statistics field definitions clear enough to understand without implementation knowledge? [Clarity, Data Model §PoolStatistics] - [ ] **CHK121** - Are requirements specified for statistics accuracy guarantees (eventual consistency acceptable, or must be exact)? [Gap, Observability] - [ ] **CHK122** - Are requirements defined for health check response format (JSON schema, field definitions)? [Completeness, Contracts §health-check-api.md] - [ ] **CHK123** - Are requirements defined for metrics exportability (Prometheus format, custom exporter hooks)? [Gap, Observability] - [ ] **CHK124** - Are requirements defined for alerting integration (when to alert, alert severity mapping)? [Gap, Observability] - [ ] **CHK125** - Are requirements specified for debugging support (connection tracing, verbose logging mode)? [Gap, Observability] --- ## Category 13: Dependencies & Integration Requirements Quality **Purpose**: Validate external dependencies and integration points are well-specified - [ ] **CHK126** - Are asyncpg dependency requirements specified (version constraints, required features)? [Completeness, Plan §Dependencies] - [ ] **CHK127** - Are Pydantic dependency requirements specified (version constraints, BaseSettings support)? [Completeness, Plan §Dependencies] - [ ] **CHK128** - Are FastMCP integration requirements specified (health endpoint format, context injection)? [Completeness, Spec §FR-008] - [ ] **CHK129** - Are PostgreSQL version requirements specified (minimum version, required extensions)? [Completeness, Plan §Storage] - [ ] **CHK130** - Are requirements defined for database schema expectations (tables must exist, permissions required)? [Gap, Dependencies] - [ ] **CHK131** - Are requirements defined for FastMCP server lifecycle integration (startup sequence, shutdown coordination)? [Gap, Integration] - [ ] **CHK132** - Are requirements defined for MCP tool error handling (how pool errors propagate to MCP responses)? [Gap, Integration] - [ ] **CHK133** - Are requirements defined for interaction with other MCP server components (indexer, search)? [Gap, Integration] - [ ] **CHK134** - Are requirements defined for testing isolation (mock database connections, test fixtures)? [Gap, Test Requirements] - [ ] **CHK135** - Are requirements defined for backward compatibility with existing database connections (migration path)? [Gap, Upgrade Path] --- ## Category 14: Assumptions & Constraints Validation **Purpose**: Validate documented assumptions are reasonable and constraints are justified - [ ] **CHK136** - Is the "single database instance" assumption validated as acceptable for all deployment scenarios? [Assumption Validation, Spec §Assumptions] - [ ] **CHK137** - Is the "PostgreSQL-compatible protocol" assumption justified (no plans to support other databases)? [Assumption Validation, Spec §Assumptions] - [ ] **CHK138** - Is the "Unix-like signal handling" assumption documented with Windows alternative or explicit non-support? [Assumption Validation, Spec §Assumptions] - [ ] **CHK139** - Is the "async runtime available" assumption validated against deployment environments? [Assumption Validation, Spec §Assumptions] - [ ] **CHK140** - Is the "database schema pre-initialized" assumption documented with initialization procedures? [Assumption Validation, Spec §Assumptions] - [ ] **CHK141** - Is the "network reliability" assumption validated with expected failure rates and recovery expectations? [Assumption Validation, Spec §Assumptions] - [ ] **CHK142** - Is the "single server instance" assumption justified (no distributed pooling requirements)? [Assumption Validation, Spec §Assumptions] - [ ] **CHK143** - Is the max_size=10 default constraint justified based on typical workload or PostgreSQL connection limits? [Constraint Justification, Configuration] - [ ] **CHK144** - Is the 30s timeout constraint justified based on user tolerance or system requirements? [Constraint Justification, Configuration] - [ ] **CHK145** - Is the <100MB memory constraint justified based on deployment environment resource availability? [Constraint Justification, Spec §SC-011] --- ## Category 15: Ambiguities & Conflicts **Purpose**: Identify and resolve unclear or conflicting requirements - [ ] **CHK146** - Is "fail fast" terminology consistent throughout spec (immediate exception vs. retry attempts)? [Ambiguity, Spec §FR-007] - [ ] **CHK147** - Is "health check" terminology consistent (database connectivity vs. pool statistics vs. both)? [Ambiguity, Spec §FR-008] - [ ] **CHK148** - Is "graceful" shutdown precisely defined (wait for active queries vs. wait for idle pool)? [Ambiguity, Spec §FR-005] - [ ] **CHK149** - Is "automatic" reconnection behavior fully specified (autonomous vs. triggered by next request)? [Ambiguity, Spec §FR-003] - [ ] **CHK150** - Is "real-time" statistics update frequency specified (on every operation vs. periodic refresh)? [Ambiguity, Spec §FR-004] - [ ] **CHK151** - Is "connection held" definition clear (acquired connection vs. any reference to connection object)? [Ambiguity, Spec §FR-006] - [ ] **CHK152** - Is "validation fails" outcome consistent (create new connection vs. mark pool unhealthy)? [Ambiguity, Spec §FR-002] - [ ] **CHK153** - Is "pool exhaustion" terminology consistent (all connections active vs. at max_size)? [Ambiguity, Edge Cases] - [ ] **CHK154** - Are "actionable error messages" requirements specific enough to be testable? [Ambiguity, Spec §FR-007] - [ ] **CHK155** - Is "lightweight" validation query quantified (execution time, resource usage)? [Ambiguity, Spec §FR-002] --- ## Category 16: Traceability & Test Coverage **Purpose**: Validate requirements are traceable and testable - [ ] **CHK156** - Does each functional requirement (FR-001 to FR-010) trace to at least one user story? [Traceability, Requirements Structure] - [ ] **CHK157** - Does each user story (US-001 to US-004) include measurable acceptance scenarios? [Traceability, Spec §User Scenarios] - [ ] **CHK158** - Does each success criterion (SC-001 to SC-013) map to corresponding test scenario in quickstart.md? [Traceability, Test Coverage] - [ ] **CHK159** - Are all edge cases documented in spec also covered in acceptance scenarios or quickstart.md? [Traceability, Edge Case Coverage] - [ ] **CHK160** - Are all alternative paths documented with specific test scenarios? [Traceability, Alternative Flows] - [ ] **CHK161** - Is requirement versioning established (how to track requirement changes over time)? [Gap, Traceability] - [ ] **CHK162** - Are backward traceability links complete (user story → FR → SC → test scenario)? [Traceability, Complete Coverage] - [ ] **CHK163** - Are forward traceability links complete (test scenario → SC → FR → user story)? [Traceability, Complete Coverage] - [ ] **CHK164** - Is requirement coverage completeness measurable (can calculate % of requirements with test coverage)? [Measurability, Traceability] - [ ] **CHK165** - Are orphan requirements identified (requirements not traced to user story or test)? [Traceability, Quality Check] --- ## Category 17: Documentation Quality **Purpose**: Validate requirement documentation is clear and maintainable - [ ] **CHK166** - Are all technical terms defined in a glossary or on first use? [Clarity, Documentation] - [ ] **CHK167** - Are requirement numbering schemes consistent (FR-001 to FR-010, SC-001 to SC-013)? [Consistency, Documentation] - [ ] **CHK168** - Are acceptance scenario numbering schemes consistent within each user story? [Consistency, Documentation] - [ ] **CHK169** - Is terminology consistent between spec.md, plan.md, data-model.md, and contracts/? [Consistency, Cross-Document] - [ ] **CHK170** - Are all entity definitions (ConnectionPoolManager, PoolStatistics, etc.) complete with purpose, responsibilities, and relationships? [Completeness, Data Model] - [ ] **CHK171** - Are all API contracts (health-check-api.md, pool-manager-api.md) complete with request/response formats, error codes, and examples? [Completeness, Contracts] - [ ] **CHK172** - Are all references to external documents valid (links work, sections exist)? [Quality, Documentation] - [ ] **CHK173** - Are diagrams/state machines provided for complex behaviors (state transitions, reconnection flow)? [Gap, Documentation] - [ ] **CHK174** - Is requirement rationale documented (why these thresholds, why these design choices)? [Gap, Documentation] - [ ] **CHK175** - Are examples provided for all complex requirements (configuration formats, error messages, log entries)? [Gap, Documentation] --- ## Summary Statistics **Total Checklist Items**: 175 **Coverage by Category**: - Requirement Completeness: 15 items (CHK001-CHK015) - Requirement Clarity: 15 items (CHK016-CHK030) - Requirement Consistency: 10 items (CHK031-CHK040) - Acceptance Criteria Quality: 15 items (CHK041-CHK055) - Scenario Coverage - Primary: 5 items (CHK056-CHK060) - Scenario Coverage - Alternate: 5 items (CHK061-CHK065) - Scenario Coverage - Exception: 10 items (CHK066-CHK075) - Scenario Coverage - Recovery: 8 items (CHK076-CHK083) - Scenario Coverage - Non-Functional: 9 items (CHK084-CHK092) - Edge Case Coverage: 13 items (CHK093-CHK105) - Configuration Requirements: 10 items (CHK106-CHK115) - Observability & Monitoring: 10 items (CHK116-CHK125) - Dependencies & Integration: 10 items (CHK126-CHK135) - Assumptions & Constraints: 10 items (CHK136-CHK145) - Ambiguities & Conflicts: 10 items (CHK146-CHK155) - Traceability & Test Coverage: 10 items (CHK156-CHK165) - Documentation Quality: 10 items (CHK166-CHK175) **Traceability Coverage**: 147/175 items (84%) include explicit spec section references, [Gap] markers, or cross-references **Risk Coverage**: - Connection leak detection: CHK006, CHK072, CHK080, CHK099, CHK106, CHK151 - Database outage recovery: CHK003, CHK013, CHK066, CHK069, CHK076-CHK078, CHK081, CHK083, CHK100-CHK101, CHK103 - Performance degradation: CHK016-CHK025, CHK041-CHK053, CHK084-CHK089 - Configuration errors: CHK007, CHK026, CHK028, CHK070, CHK106-CHK115, CHK137-CHK145 **Quality Dimensions Addressed**: - ✅ Completeness (all necessary requirements present) - ✅ Clarity (requirements specific and unambiguous) - ✅ Consistency (requirements align without conflicts) - ✅ Measurability (success criteria objectively verifiable) - ✅ Coverage (all scenarios/edge cases addressed) - ✅ Traceability (requirements linked to user stories and tests) **Notes**: - This checklist is "unit tests for requirements writing" - each item evaluates the quality of the requirements themselves, not implementation correctness - Items marked [Gap] indicate potentially missing requirements that should be considered - Items marked [Ambiguity] or [Conflict] indicate requirements needing clarification - All items can be checked during spec review before implementation begins