# Logging System Requirements Quality Checklist: Basic Structured Logging

**Purpose**: Validate requirements quality for structured logging system covering completeness, clarity, consistency, and measurability across all components (File/Console/RabbitMQ handlers, security, performance, edge cases)  
**Created**: 2025-10-12  
**Feature**: [spec.md](../spec.md)  
**Depth**: Standard (equal focus on security and performance critical paths)  
**Scope**: Complete coverage - all 3 handlers, all 10 edge cases, full security + performance requirements

## Requirement Completeness

- [ ] CHK001 - Are JSON schema structure requirements fully specified for all mandatory and optional fields? [Completeness, Spec §FR-001]
- [ ] CHK002 - Are log level definitions (ERROR, WARN, INFO, DEBUG) specified with clear usage criteria for each level? [Completeness, Spec §FR-002]
- [ ] CHK003 - Are file naming pattern requirements unambiguous (rabbitmq-mcp-{date}.log format specifics)? [Completeness, Spec §FR-003]
- [ ] CHK004 - Are all sensitive data categories requiring redaction explicitly enumerated? [Completeness, Spec §FR-004, FR-020]
- [ ] CHK005 - Are correlation ID generation requirements complete for both normal and fallback scenarios? [Completeness, Spec §FR-005, FR-023]
- [ ] CHK006 - Are connection event logging requirements defined for all connection lifecycle states (attempt, success, failure, disconnection)? [Completeness, Spec §FR-006]
- [ ] CHK007 - Are MCP tool operation logging requirements complete for all operation phases (invocation, execution, completion)? [Completeness, Spec §FR-007]
- [ ] CHK008 - Are error logging requirements specified for all error types (exception type, message, stack trace, context)? [Completeness, Spec §FR-008]
- [ ] CHK009 - Are security event logging requirements defined for all authentication and authorization scenarios? [Completeness, Spec §FR-009]
- [ ] CHK010 - Are performance metrics requirements specified for all measurable dimensions (timing, resource usage)? [Completeness, Spec §FR-010]
- [ ] CHK011 - Are timestamp format requirements unambiguous (ISO 8601 UTC with Z suffix specifics)? [Completeness, Spec §FR-011]
- [ ] CHK012 - Are log rotation requirements complete for both daily and size-based triggers? [Completeness, Spec §FR-012, FR-013]
- [ ] CHK013 - Are log retention requirements specified with clear duration thresholds and cleanup behavior? [Completeness, Spec §FR-014]
- [ ] CHK014 - Are file permission requirements defined with fallback behavior when setting fails? [Completeness, Spec §FR-015]
- [ ] CHK015 - Are asynchronous logging requirements complete including buffer behavior at capacity? [Completeness, Spec §FR-017]
- [ ] CHK016 - Are compression requirements specified for rotated logs (format, conditions, timing)? [Completeness, Spec §FR-018]
- [ ] CHK017 - Are audit trail requirements complete for all operation lifecycle stages? [Completeness, Spec §FR-019]
- [ ] CHK018 - Are fallback logging requirements defined for all file logging failure scenarios? [Completeness, Spec §FR-021]
- [ ] CHK019 - Are multi-line message formatting requirements specified (escape sequences, preservation rules)? [Completeness, Spec §FR-022]
- [ ] CHK020 - Are message truncation requirements complete (size limit, truncation indicator, boundary behavior)? [Completeness, Spec §FR-024]
- [ ] CHK021 - Are concurrent file access requirements specified for all access patterns? [Completeness, Spec §FR-025]
- [ ] CHK022 - Are runtime configuration reload requirements complete (signals, scope, timing)? [Completeness, Spec §FR-026]
- [ ] CHK023 - Are schema versioning requirements defined for version field format and evolution strategy? [Completeness, Spec §FR-027]
- [ ] CHK024 - Are graceful shutdown requirements complete (signal handling, flush behavior, blocking guarantees)? [Completeness, Spec §FR-028]

## Requirement Clarity

- [ ] CHK025 - Is "structured JSON format" quantified with specific schema fields and data types? [Clarity, Spec §FR-001]
- [ ] CHK026 - Is "./logs/ directory" path specification clear across platforms (Windows/Linux/macOS)? [Clarity, Spec §FR-003]
- [ ] CHK027 - Is "automatically redact" defined with specific detection methods and replacement format? [Clarity, Spec §FR-004]
- [ ] CHK028 - Is "unique correlation ID" quantified with format specifications (UUID vs timestamp-based)? [Clarity, Spec §FR-005]
- [ ] CHK029 - Is "operation execution time" defined with specific measurement boundaries (start/end points)? [Clarity, Spec §FR-007]
- [ ] CHK030 - Is "contextual information" in error logs specified with required context fields? [Clarity, Spec §FR-008]
- [ ] CHK031 - Is "performance metrics" quantified with specific measurable properties? [Clarity, Spec §FR-010]
- [ ] CHK032 - Is "100MB size limit" precise about measurement units and boundary conditions? [Clarity, Spec §FR-013]
- [ ] CHK033 - Is "30 days minimum" retention period unambiguous about calculation method (creation vs last modified)? [Clarity, Spec §FR-014]
- [ ] CHK034 - Is "secure file permissions (600)" explained with platform-specific requirements? [Clarity, Spec §FR-015]
- [ ] CHK035 - Is "under 5ms overhead" defined with measurement methodology and baseline? [Clarity, Spec §FR-016]
- [ ] CHK036 - Is "high-throughput scenarios" quantified with specific throughput thresholds? [Clarity, Spec §FR-017]
- [ ] CHK037 - Is "complete operation lifecycle" defined with specific lifecycle stages to be logged? [Clarity, Spec §FR-019]
- [ ] CHK038 - Is "credentials or sensitive data" defined with exhaustive pattern list? [Clarity, Spec §FR-020]
- [ ] CHK039 - Is "single JSON string with escaped newline characters" formatted with example? [Clarity, Spec §FR-022]
- [ ] CHK040 - Is "100KB limit" for message truncation precise about byte vs character counting? [Clarity, Spec §FR-024]
- [ ] CHK041 - Is "write-through approach" explained with specific concurrent access semantics? [Clarity, Spec §FR-025]
- [ ] CHK042 - Is "runtime configuration reload" specified with exact configuration parameters that can change? [Clarity, Spec §FR-026]
- [ ] CHK043 - Is "semantic versioning format" for schema_version defined with example and increment rules? [Clarity, Spec §FR-027]

## Requirement Consistency

- [ ] CHK044 - Are log level requirements consistent between FR-002 and user story acceptance scenarios? [Consistency, Spec §FR-002]
- [ ] CHK045 - Are correlation ID requirements consistent across FR-005, FR-023, and User Story 2? [Consistency]
- [ ] CHK046 - Are timestamp requirements consistent across FR-011 (UTC) and edge case handling (DST)? [Consistency]
- [ ] CHK047 - Are rotation requirements consistent between daily (FR-012) and size-based (FR-013) triggers? [Consistency]
- [ ] CHK048 - Are retention requirements consistent with rotation behavior (30 days in FR-014)? [Consistency]
- [ ] CHK049 - Are performance requirements consistent between FR-016 (<5ms) and async logging (FR-017)? [Consistency]
- [ ] CHK050 - Are security requirements consistent across FR-004, FR-009, FR-015, and FR-020? [Consistency]
- [ ] CHK051 - Are error handling requirements consistent across FR-008, FR-021, and edge cases? [Consistency]
- [ ] CHK052 - Are audit trail requirements consistent between FR-019 and correlation ID tracking (FR-005)? [Consistency]
- [ ] CHK053 - Are graceful shutdown requirements consistent with zero log loss guarantee and async buffering? [Consistency, Spec §FR-017, FR-028]

## Handler Requirements Coverage

- [ ] CHK054 - Are File handler requirements complete for all file operations (create, write, rotate, compress)? [Coverage, Gap]
- [ ] CHK055 - Are Console handler requirements specified for stderr/stdout output behavior? [Coverage, Spec §FR-021]
- [ ] CHK056 - Are RabbitMQ handler requirements defined for AMQP publishing (exchange, routing, format)? [Coverage, Gap]
- [ ] CHK057 - Are handler selection/fallback requirements specified when primary handler fails? [Coverage, Gap]
- [ ] CHK058 - Are handler-specific error handling requirements consistent across all 3 handlers? [Consistency, Gap]
- [ ] CHK059 - Are handler configuration requirements defined for all handler-specific parameters? [Completeness, Gap]
- [ ] CHK060 - Are handler initialization and cleanup requirements specified? [Coverage, Gap]

## Acceptance Criteria Quality

- [ ] CHK061 - Can "structured JSON format with consistent schema" (FR-001) be objectively verified? [Measurability, Spec §FR-001]
- [ ] CHK062 - Can "automatically redact sensitive data" (FR-004) be objectively tested? [Measurability, Spec §FR-004]
- [ ] CHK063 - Can "unique correlation IDs" (FR-005) be verified for uniqueness and propagation? [Measurability, Spec §FR-005]
- [ ] CHK064 - Can "operation execution time" logging (FR-007) be measured and validated? [Measurability, Spec §FR-007]
- [ ] CHK065 - Can "complete operation lifecycle tracking" (FR-019) be objectively verified? [Measurability, Spec §FR-019]
- [ ] CHK066 - Can "<5ms overhead per operation" (FR-016) be measured with specific test methodology? [Measurability, Spec §FR-016]
- [ ] CHK067 - Can "100MB size limit" rotation (FR-013) be tested deterministically? [Measurability, Spec §FR-013]
- [ ] CHK068 - Can "30 days minimum retention" (FR-014) be verified objectively? [Measurability, Spec §FR-014]
- [ ] CHK069 - Can "secure file permissions (600)" (FR-015) be tested across platforms? [Measurability, Spec §FR-015]
- [ ] CHK070 - Can "zero log loss guarantee" be verified during buffer saturation and shutdown? [Measurability, Spec §FR-017, FR-028]

## Scenario Coverage - Primary Flows

- [ ] CHK071 - Are requirements defined for normal startup and initialization flow? [Coverage, Spec §User Story 1]
- [ ] CHK072 - Are requirements defined for successful operation execution flow? [Coverage, Spec §User Story 1]
- [ ] CHK073 - Are requirements defined for error handling and logging flow? [Coverage, Spec §User Story 1]
- [ ] CHK074 - Are requirements defined for audit trail creation flow? [Coverage, Spec §User Story 2]
- [ ] CHK075 - Are requirements defined for performance monitoring flow? [Coverage, Spec §User Story 3]
- [ ] CHK076 - Are requirements defined for log rotation and retention flow? [Coverage, Spec §User Story 4]
- [ ] CHK077 - Are requirements defined for debug-level logging flow? [Coverage, Spec §User Story 5]
- [ ] CHK078 - Are requirements defined for graceful shutdown flow? [Coverage, Spec §FR-028]

## Scenario Coverage - Alternate Flows

- [ ] CHK079 - Are requirements defined for fallback to console when file logging fails? [Coverage, Spec §FR-021]
- [ ] CHK080 - Are requirements defined for timestamp-based correlation ID fallback? [Coverage, Spec §FR-023]
- [ ] CHK081 - Are requirements defined for message truncation when size exceeds limit? [Coverage, Spec §FR-024]
- [ ] CHK082 - Are requirements defined for continuing with default permissions when secure setting fails? [Coverage, Spec §FR-015]
- [ ] CHK083 - Are requirements defined for runtime configuration reload via signal? [Coverage, Spec §FR-026]

## Edge Case Coverage - Individual Validation

- [ ] CHK084 - Are requirements defined for "logs directory doesn't exist or is not writable" edge case? [Edge Case, Spec §Edge Cases]
- [ ] CHK085 - Are requirements defined for "log writing failures (disk full, permission denied)" edge case? [Edge Case, Spec §Edge Cases]
- [ ] CHK086 - Are requirements defined for "concurrent file access (reading/archiving during writes)" edge case? [Edge Case, Spec §Edge Cases]
- [ ] CHK087 - Are requirements defined for "multi-line messages formatting (stack traces)" edge case? [Edge Case, Spec §FR-022, Edge Cases]
- [ ] CHK088 - Are requirements defined for "correlation ID generation failure" edge case? [Edge Case, Spec §FR-023, Edge Cases]
- [ ] CHK089 - Are requirements defined for "very large log messages (>1MB)" edge case? [Edge Case, Spec §FR-024, Edge Cases]
- [ ] CHK090 - Are requirements defined for "date/time changes (DST, timezone shifts)" edge case? [Edge Case, Spec §Edge Cases]
- [ ] CHK091 - Are requirements defined for "async buffer saturation" edge case? [Edge Case, Spec §FR-017, Edge Cases]
- [ ] CHK092 - Are requirements defined for "file permission setting failure" edge case? [Edge Case, Spec §FR-015, Edge Cases]
- [ ] CHK093 - Are requirements defined for "graceful shutdown with buffered logs" edge case? [Edge Case, Spec §FR-028, Edge Cases]

## Exception/Error Flow Requirements

- [ ] CHK094 - Are error response requirements defined when logging initialization fails? [Coverage, Exception Flow]
- [ ] CHK095 - Are error response requirements defined when correlation ID generation fails? [Coverage, Exception Flow]
- [ ] CHK096 - Are error response requirements defined when redaction pattern matching fails? [Coverage, Exception Flow]
- [ ] CHK097 - Are error response requirements defined when file rotation fails mid-operation? [Coverage, Exception Flow]
- [ ] CHK098 - Are error response requirements defined when compression of rotated logs fails? [Coverage, Exception Flow]
- [ ] CHK099 - Are error response requirements defined when schema validation fails for log entries? [Coverage, Exception Flow]
- [ ] CHK100 - Are error response requirements defined when RabbitMQ handler connection fails? [Coverage, Exception Flow]

## Recovery Flow Requirements

- [ ] CHK101 - Are recovery requirements defined for re-establishing file access after disk space freed? [Coverage, Recovery Flow]
- [ ] CHK102 - Are recovery requirements defined for resuming logging after buffer drain? [Coverage, Recovery Flow]
- [ ] CHK103 - Are recovery requirements defined for handler reconnection after transient failures? [Coverage, Recovery Flow]
- [ ] CHK104 - Are recovery requirements defined for config reload after invalid configuration? [Coverage, Recovery Flow]

## Non-Functional Requirements - Security

- [ ] CHK105 - Are authentication requirements for accessing log files specified? [Gap, Security NFR]
- [ ] CHK106 - Are data protection requirements for logs at rest defined? [Gap, Security NFR]
- [ ] CHK107 - Are requirements for preventing log injection attacks specified? [Gap, Security NFR]
- [ ] CHK108 - Are requirements for log tampering prevention defined? [Gap, Security NFR]
- [ ] CHK109 - Is credential redaction performance impact quantified? [Measurability, Spec §FR-004]
- [ ] CHK110 - Are requirements for secure transmission of logs to RabbitMQ handler defined (TLS, authentication)? [Gap, Security NFR]

## Non-Functional Requirements - Performance

- [ ] CHK111 - Are throughput requirements quantified (logs per second)? [Gap, Performance NFR]
- [ ] CHK112 - Are memory usage requirements for async buffers specified? [Gap, Performance NFR]
- [ ] CHK113 - Are disk I/O requirements quantified (writes per second, IOPS)? [Gap, Performance NFR]
- [ ] CHK114 - Are CPU overhead requirements specified beyond 5ms per operation? [Gap, Performance NFR]
- [ ] CHK115 - Are latency requirements defined for different log levels (ERROR vs DEBUG)? [Gap, Performance NFR]
- [ ] CHK116 - Are performance degradation requirements defined under high load? [Gap, Performance NFR]
- [ ] CHK117 - Are benchmark/baseline requirements specified for performance validation? [Gap, Performance NFR]

## Non-Functional Requirements - Reliability

- [ ] CHK118 - Are uptime requirements for logging system specified? [Gap, Reliability NFR]
- [ ] CHK119 - Are requirements for log durability guarantees defined (fsync behavior)? [Gap, Reliability NFR]
- [ ] CHK120 - Are requirements for handling system crashes mid-write specified? [Gap, Reliability NFR]
- [ ] CHK121 - Are requirements for log integrity verification defined? [Gap, Reliability NFR]

## Non-Functional Requirements - Observability

- [ ] CHK122 - Are requirements for monitoring logging system health defined? [Gap, Observability NFR]
- [ ] CHK123 - Are requirements for alerting on logging failures specified? [Gap, Observability NFR]
- [ ] CHK124 - Are requirements for logging system metrics (buffer usage, write latency) defined? [Gap, Observability NFR]

## Non-Functional Requirements - Cross-Platform

- [ ] CHK125 - Are cross-platform compatibility requirements explicit for Windows/Linux/macOS? [Gap, Portability NFR]
- [ ] CHK126 - Are platform-specific signal handling differences addressed (SIGHUP on Unix, Windows alternatives)? [Clarity, Spec §FR-026]
- [ ] CHK127 - Are platform-specific file path requirements specified (forward/backward slashes)? [Gap, Portability NFR]
- [ ] CHK128 - Are platform-specific permission model differences addressed? [Clarity, Spec §FR-015]

## Dependencies & Assumptions

- [ ] CHK129 - Are external dependency requirements documented (structlog, pydantic, orjson)? [Traceability, Plan]
- [ ] CHK130 - Are file system capability requirements documented (write permissions, disk space)? [Gap, Dependencies]
- [ ] CHK131 - Are Python version requirements specified (3.12+)? [Gap, Dependencies]
- [ ] CHK132 - Are RabbitMQ connection requirements documented for RabbitMQ handler? [Gap, Dependencies]
- [ ] CHK133 - Is the assumption of "adequate disk space" quantified with minimum requirements? [Ambiguity, Assumptions]
- [ ] CHK134 - Is the assumption of "time synchronization" specified with accuracy requirements? [Ambiguity, Assumptions]
- [ ] CHK135 - Is the assumption about "hardware capabilities determining throughput" bounded with minimum specs? [Ambiguity, Assumptions]

## Ambiguities & Conflicts

- [ ] CHK136 - Is there potential conflict between "block writes on buffer saturation" (FR-017) and "<5ms overhead" (FR-016)? [Conflict, Spec §FR-016, FR-017]
- [ ] CHK137 - Is "write-through approach" (FR-025) clearly distinguished from "async logging" (FR-017)? [Ambiguity, Spec §FR-017, FR-025]
- [ ] CHK138 - Is the relationship between daily rotation (FR-012) and size-based rotation (FR-013) unambiguous when both trigger simultaneously? [Ambiguity, Spec §FR-012, FR-013]
- [ ] CHK139 - Is "attempt to create directory" (Edge Cases) vs "fallback to stderr" (FR-021) priority order clear? [Ambiguity, Edge Cases]
- [ ] CHK140 - Is "block process termination" (FR-028) timeout behavior specified to prevent indefinite hangs? [Gap, Spec §FR-028]
- [ ] CHK141 - Is the scope of "no credential values" (FR-020) vs "contextual information" (FR-008) boundary clear? [Ambiguity, Spec §FR-008, FR-020]
- [ ] CHK142 - Is "standard JSON tools" assumption defined with specific tool compatibility requirements? [Ambiguity, Assumptions]

## Traceability

- [ ] CHK143 - Is a requirement ID scheme established for all functional requirements? [Traceability] ✅ (FR-001 to FR-028 exists)
- [ ] CHK144 - Are all user stories traceable to specific functional requirements? [Traceability]
- [ ] CHK145 - Are all edge cases traceable to specific functional requirements or gaps? [Traceability]
- [ ] CHK146 - Are all success criteria traceable to measurable requirements? [Traceability]
- [ ] CHK147 - Are all acceptance scenarios traceable to functional requirements? [Traceability]

## Success Criteria Validation

- [ ] CHK148 - Can "90% of production issues diagnosed using log information alone" (SC-001) be measured? [Measurability, Spec §SC-001]
- [ ] CHK149 - Can "100% coverage of operation lifecycle tracing" (SC-002) be verified? [Measurability, Spec §SC-002]
- [ ] CHK150 - Can "<5ms overhead" (SC-003) be tested with repeatable methodology? [Measurability, Spec §SC-003]
- [ ] CHK151 - Can "zero instances of credentials in logs" (SC-004) be objectively verified? [Measurability, Spec §SC-004]
- [ ] CHK152 - Can "disk space usage under control" (SC-005) be quantified and measured? [Measurability, Spec §SC-005]
- [ ] CHK153 - Can "95% of error investigations start with log queries" (SC-006) be measured? [Measurability, Spec §SC-006]
- [ ] CHK154 - Can "standard JSON processing tools" compatibility (SC-007) be tested objectively? [Measurability, Spec §SC-007]
- [ ] CHK155 - Can "performance bottlenecks identified within 10 minutes" (SC-008) be verified? [Measurability, Spec §SC-008]

## Notes

- Check items off as completed: `[x]`
- Add investigation findings inline after each item
- Items marked [Gap] indicate missing requirements that should be added to spec
- Items marked [Ambiguity] or [Conflict] require clarification in spec
- 155 total checklist items covering all dimensions of requirements quality
- Focus: Equal depth on security (CHK105-110) and performance (CHK111-117) as requested
- Scope: Complete coverage of all 3 handlers (CHK054-060), all 10 edge cases (CHK084-093)
