Mai/.planning/phases/02-safety-sandboxing/02-03-PLAN.md

phase, plan, type, wave, depends_on, files_modified, autonomous, must_haves

phase	plan	type	wave	depends_on	files_modified	autonomous	must_haves
02-safety-sandboxing	03	execute	2	02-01 02-02	src/audit/__init__.py src/audit/logger.py src/audit/crypto_logger.py config/audit.yaml	true	truths artifacts key_links All security-sensitive operations are logged with tamper detection Audit logs use SHA-256 hash chains for integrity Logs contain timestamps, code diffs, security events, and resource usage Log tampering is detectable through cryptographic verification path provides min_lines src/audit/crypto_logger.py Tamper-proof logging system 60 path provides min_lines src/audit/logger.py Standard audit logging interface 30 path provides contains config/audit.yaml Audit logging policies retention_period, log_level, hash_chain from to via pattern src/audit/crypto_logger.py cryptography library SHA-256 hashing hashlib.sha256 from to via pattern src/audit/crypto_logger.py previous hash chain hash linking prev_hash.*current_hash from to via pattern config/audit.yaml log retention policy retention configuration retention.*days

Create tamper-proof audit logging system with cryptographic integrity protection.

Purpose: Implement comprehensive audit logging for all security-sensitive operations with SHA-256 hash chains to detect tampering, following CONTEXT.md requirements for timestamps, code diffs, security events, and resource usage logging. Output: Working audit logger with tamper detection and configurable retention policies.

<execution_context> @/.opencode/get-shit-done/workflows/execute-plan.md @/.opencode/get-shit-done/templates/summary.md </execution_context>

@.planning/PROJECT.md @.planning/ROADMAP.md @.planning/STATE.md

Research references

@.planning/phases/02-safety-sandboxing/02-RESEARCH.md

Task 1: Create tamper-proof audit logger src/audit/__init__.py, src/audit/crypto_logger.py Create TamperProofLogger class implementing SHA-256 hash chains for tamper detection. Each log entry contains: timestamp, event type, code diffs, security events, resource usage, current hash, previous hash, and cryptographic signature. Use cryptography library for SHA-256 hashing and digital signatures. Include methods: log_event(event), verify_chain(), get_logs(). Handle hash chain continuity and integrity verification. python -c "from src.audit.crypto_logger import TamperProofLogger; print('TamperProofLogger imported successfully')" TamperProofLogger creates hash chain entries, detects tampering, maintains integrity Task 2: Implement audit logging interface src/audit/logger.py Create AuditLogger class that provides high-level interface for logging security events. Integrate with TamperProofLogger for integrity protection. Include methods: log_code_execution(code, result), log_security_assessment(assessment), log_container_creation(config), log_resource_violation(violation). Format log entries per CONTEXT.md specifications with comprehensive event details. python -c "from src.audit.logger import AuditLogger; print('AuditLogger imported successfully')" AuditLogger provides convenient interface for all security-related logging Task 3: Configure audit policies config/audit.yaml Create config/audit.yaml with audit logging policies: retention_period (30 days default), log_level (comprehensive), hash_chain_enabled (true), storage_location, alert_thresholds, and log rotation settings. Include Claude's discretion items for configurable retention, storage format, and alerting mechanisms per CONTEXT.md. python -c "import yaml; print('Audit config loads:', yaml.safe_load(open('config/audit.yaml'))')" Audit configuration defines retention, storage, and alerting policies - TamperProofLogger creates proper hash chain entries - SHA-256 hashing works correctly - Hash chain tampering is detectable - AuditLogger integrates with crypto logger - All security event types are logged - Configuration file defines proper policies - Log retention and rotation work correctly

<success_criteria> Tamper-proof audit logging system operational with cryptographic integrity protection, comprehensive event logging, and configurable retention policies. </success_criteria>

After completion, create `.planning/phases/02-safety-sandboxing/02-03-SUMMARY.md`