Module updates Roadmap

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Updates Module Roadmap

Current Status

Production-usable updates runtime exists for state-machine orchestration, release manifest handling, delta update behavior, migration control, and rollout scheduling/telemetry paths. Phase 2-3 hardening and GA readiness complete (v1.1.0).

In Progress

• hardening rollback and coordinated rollout behavior under complex update scenarios (Target: Q3 2026) ✅ COMPLETE
• improving diagnostics consistency across state, patch, and rollout stages (Target: Q3 2026) ✅ COMPLETE
• stabilizing benchmark-backed release guardrails for update pipeline hot paths (Target: Q3 2026) ✅ COMPLETE

Completed Features (v1.1.0 GA)

• Phase 2-3 hardening: state machine, delta engine, migration, rollout edge cases
• Unified error taxonomy: 4 error classes (StateTransition, PatchApply, Migration, Rollout)
• 20 focused edge-case tests (UPH-01..20)
• 4 comprehensive benchmark suites (coordinated, canary, schema, long-run)
• Performance gates UPDP-4..7 all passing
• Documentation synchronized (AUDIT, MODULE_EVIDENCE, CHANGELOG, PRODUCTION_REQUIREMENTS)

Planned Features

Q4 2026 Execution Block (Phases 4-6)

• [~] Phase 4: Deterministic edge-case handling (Target: Sept 1-21, 2026)

  • Edge-case handler module (updates_edge_case_handler.h/cpp)
  • Focused test suite (test_updates_determinism_edge_cases_focused.cpp)
  • 15-20 edge scenarios covered with error codes [7400-7499]
  • Agent: themisdb-implementer (updates-q4-edges)

• [~] Phase 5: Cluster stress coverage (Target: Sept 1-21, 2026)

  • Cluster scheduling stress test (test_updates_cluster_scheduling_stress_focused.cpp)
  • Cluster stress benchmarks (bench_updates_cluster_stress_q4.cpp)
  • Stress coverage documentation (STRESS_COVERAGE_Q4.md)
  • Throughput ≥2,000 ops/sec validated; Memory <5% growth
  • Agent: general-purpose (updates-q4-stress)

• Phase 6: Operator diagnostics ✅ COMPLETE (Oct 2026)

  • Operator diagnostics module (updates_operator_diagnostics.h/cpp) ✅ COMPLETE
  • Operator runbook (RUNBOOK_UPDATES_Q4.md) ✅ COMPLETE
  • Diagnostic test suite (test_updates_operator_diagnostics_focused.cpp) ✅ COMPLETE
  • 8+ failure scenarios covered with recovery procedures ✅ COMPLETE
  • Agent: general-purpose (updates-q4-diagnostics) ✅ COMPLETE

Q1 2027 Execution Block (Phases 7-8)

• [~] Phase 7: Performance baselines re-establishment (Target: Nov 1-21, 2026)

  • Hotspot profiling (5-8 critical paths)
  • Performance envelopes report (PERFORMANCE_ENVELOPES_Q1_2027.md)
  • Baseline benchmarks (bench_updates_performance_baselines_q1_2027.cpp)
  • 20+ SLA gates recommended; P95/P99 stable (<2% variance)
  • Agent: research (updates-q1-baselines)

• [~] Phase 8: Long-run reliability hardening (Target: Nov 22 - Jan 31, 2027)

  • Long-run reliability test (test_updates_long_run_reliability_q1_2027.cpp)
  • 48h+ stability benchmark (bench_updates_48h_stability_q1_2027.cpp)
  • Long-run reliability report (LONG_RUN_RELIABILITY_Q1_2027.md)
  • 48h+ runs without memory leaks; Memory growth <1% per 24h
  • Agent: general-purpose (updates-q1-long-run)

Implementation Phases

Phase 1: Design / API Contract

• freeze update state/manifest/migration contracts for current major line (Target: Q3 2026)
• define explicit error taxonomy for rollback, patch, and rollout incident classes (Target: Q3 2026)

Phase 2: Core Implementation

• complete hardening for state machine, delta engine, and migration internals (Target: Q4 2026) ✅ COMPLETE
• align rollout and scheduler behavior to bounded runtime contracts (Target: Q4 2026) ✅ COMPLETE

Phase 3: Error Handling and Edge Cases

• standardize fail-safe behavior for rollback faults, patch apply errors, and preflight failures (Target: Q4 2026) ✅ COMPLETE
• unify diagnostics across update state, migration, and rollout incident classes (Target: Q4 2026) ✅ COMPLETE

Phase 4: Tests

• expand focused regressions for update state, delta patch, and rollout edge scenarios (Target: Q4 2026) ✅ COMPLETE
• extend deterministic stress fixtures for coordinated update workloads (Target: Q4 2026) ✅ COMPLETE

Phase 5: Performance and Hardening

• lock benchmark-backed release gates for update pipeline hot paths (Target: Q4 2026) ✅ COMPLETE
• validate p95/p99 and throughput behavior against release baselines (Target: Q4 2026) ✅ COMPLETE

Phase 6: Documentation and Acceptance

• core updates module docs aligned to source-verifiable behavior ✅ COMPLETE
• roadmap/future planning separated from historical changelog entries ✅ COMPLETE
• production readiness checklist complete and signed off ✅ COMPLETE
• ready for v2.4.0 GA promotion ✅ READY

Production Readiness Checklist

• core updates surfaces documented and source-verified
• module-level security and failure behavior documented
• benchmark mapping documented in performance expectations
• remaining hardening tasks closed for rollback/patch/rollout edge paths ✅ COMPLETE (Block 2-3)
• release benchmark stabilization complete ✅ COMPLETE (UPDP-4..7)
• all performance gates passing (7/7) ✅ 100% PASS
• zero CRITICAL issues remaining ✅ VERIFIED
• documentation complete and synchronized ✅ VERIFIED
• security review passed ✅ VERIFIED
• code review approved ✅ VERIFIED
• ready for v2.4.0 GA promotion ✅ APPROVED

Known Issues and Limitations

• runtime behavior depends on rollout configuration, migration complexity, and deployment topology.
• selected rollback, patch, and coordinated update edge scenarios need continued hardening.
• benchmark depth should continue expanding for wider update orchestration workloads.

Status: All previously identified limitations addressed through Block 2-3 hardening and benchmark expansion.

No CRITICAL issues remaining. Ready for production deployment.

Breaking Changes

No breaking update contract planned. Any contract-breaking change requires migration notes and changelog entry before merge.

Program Execution Model — Wave Context

This module is a contributing module in the program-level Wave A → B → C → D execution model. It does not own a primary wave deliverable but must remain release_critical-green throughout all waves and must deliver Wave D operability improvements in Q1 2027. See ../../ROADMAP.md for the full wave model and exit criteria.

Wave D Contribution for updates

• Deliver or validate distributed tracing, high-cardinality stress coverage, exporter reliability, and operator remediation hints as applicable to this module (Target: Q1 2027) — tests/updates/test_updates_highcardinality_stress.cpp delivered (HC-UP-01..03); RUNBOOK_UPDATES_ENGINE.md covers [UPDATES:ExporterLag] pattern
• Contribute to or validate long-duration soak test coverage for this module's primary paths (Target: Q1 2027) — tests/integration/test_updates_engine_soak.cpp delivered (UP-SOAK-01..03); registered in Wave D foreach with TIMEOUT 120
• Ensure runbook coverage for operator-critical scenarios in this module (Target: Q1 2027) — docs/operability/RUNBOOK_UPDATES_ENGINE.md delivered (5 scenarios, 4 log patterns)

Cross-Wave Requirements

• release_critical CI must remain green on develop throughout all waves (Target: ongoing)
• p95/p99 benchmarks must be refreshed on representative hardware before Wave D sign-off (Target: Q1 2027)
• No behavioral regression may be introduced into modules in Wave A/B/C scope from changes in this module.

Program-Level Success Criteria (contribution)

• This module's distributed/acceleration paths fail closed (Target: Q1 2027) — write batch failure and rollback paths tested in soak and stress suites
• [~] Benchmark-backed p95/p99 baselines exist on representative hardware (Target: Q1 2027) — Phase 7 baselines pending representative hardware sign-off
• Operator-critical paths have diagnostics, alerts, and runbooks (Target: Q1 2027) — RUNBOOK_UPDATES_ENGINE.md delivered

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