Module access model Changelog

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Changelog - Access Model Module

All notable changes to the access_model module are documented here. The format is based on Keep a Changelog.

[Unreleased]

Added

• Governance documentation: AUDIT.md, CHANGELOG.md, FUTURE_ENHANCEMENTS.md, MODULE_GAPS.md, PERFORMANCE_EXPECTATIONS.md, PRODUCTION_REQUIREMENTS.md, SECURITY.md created to close compliance gap (issue #6466).

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[1.2.0] - 2026-08-17

Added

• Phase 5 observability: structured logging (access_model_logging.h/cpp), trace correlation (access_model_trace.h/cpp), Prometheus-compatible metrics.
• Phase 6 E2E integration tests (tests/access_model/test_access_model_e2e.cpp, 15 scenarios).
• Concurrency tests (tests/access_model/test_coordination_concurrency.cpp, 12 patterns).
• Benchmark gates (benchmarks/access_model/bench_access_coordinator_gates.cpp, GATE-ACM-01..06).
• Operator runbooks (5 scenarios in docs/operability/).
• Dashboard guide and Prometheus panel definitions.

Changed

• ROADMAP.md updated to reflect Phase 5-6 completion and Wave B readiness.

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[1.1.0] - 2026-08-09

Added

• Phase 2 core coordinator implementation (access_coordinator.cpp, ~530 LOC).
• age_based_policy.cpp helper methods (~303 LOC).
• access_metrics.cpp collectors (~262 LOC).
• CMakeLists.txt module registration; sources added to cmake/CMakeLists.txt THEMIS_CORE_SOURCES.
• Unit tests ACM-01..ACM-08 (tests/access_model/test_access_coordinator_focused.cpp).

Added (Phase 3 — Cache Integration)

• Eviction listener support in cache/adaptive_query_cache.h/cpp.
• setEvictionListener() method; emitEvictionEvent() helper.
• Full eviction event payload: key, tier, size_bytes, access_count, age_secs, reason.
• Integration tests CAI-01..CAI-10 (tests/access_model/test_cache_storage_integration.cpp).

Added (Phase 4 — Storage Integration)

• setPromotionListener() and emitPromotionEvent() in TieredStorageManager.
• Hot pattern detection in get() and runMigrationCycle() for WARM/COLD tiers.
• Access window calculation and full promotion event payload.

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[1.0.0] - 2026-08-03

Added

• Phase 1 architecture and interface definition:
  • AccessTier abstract interface (include/access_model/access_tier_interface.h).
  • AccessCoordinator broker interface (include/access_model/access_coordinator.h).
  • PromotionRequest / DemotionRequest data structures (promotion_demotion.h).
  • AgeBasedPolicy unified aging policy (age_based_policy.h).
  • AccessMetrics observability surface (access_metrics.h).
• Architecture documentation (ARCHITECTURE.md, ROADMAP.md, README.md).
• Cross-module integration guides (docs/architecture/UNIFIED_ACCESS_MODEL.md, docs/architecture/CACHE_STORAGE_INTEGRATION.md).

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