Module tensor Roadmap

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Tensor Module Roadmap

Current Status

Production-usable tensor runtime exists for tensor index management, hybrid bridge operation, and fingerprint graph benchmarked behavior; advanced structural and experimental surfaces continue hardening.

In Progress

• hardening tensor index/bridge behavior under concurrent workload pressure (Target: Q3 2026) [COMPLETED 2026-08-07]
• improving diagnostics consistency across tensor index, bridge, and graph operations (Target: Q3 2026) [COMPLETED 2026-08-07]
• stabilizing benchmark-backed release guardrails for tensor fingerprint and dedup paths (Target: Q3 2026) [COMPLETED 2026-08-07]
• federated and cross-shard tensor summaries (Completed 2026-07-06, Issue #5427)
• phase-5+ tensor integration closure: durable fingerprint persistence, distributed training coordinator, CUDA compression/routing path, and workflow SLO observability (Completed 2026-07-22)

Planned Features

Short-term (3-6 months)

• tighten deterministic behavior for tensor bridge and hybrid routing edge scenarios (Completed 2026-09-16 — test_tensor_highcardinality_stress.cpp, TensorSoak_BridgeRoutingReliability)
• expand stress coverage for fingerprint graph concurrent read/write patterns (Completed 2026-09-16 — test_tensor_highcardinality_stress.cpp, ConcurrentGraphReadWrite/DedupReplayStress)
• improve operator-facing diagnostics for tensor graph export and replay incidents (Completed 2026-09-16 — RUNBOOK_TENSOR_STORE.md)

Mid-term (6-12 months)

• [~] re-baseline p95/p99 envelopes for tensor query and graph operation hot paths (Target: Q1 2027 — bench_tensor_dedicated_gates.cpp TN-BM-01..TN-BM-04 in place; hardware run required)
• [~] broaden benchmark depth for tensor index and dedup replay workload diversity (Target: Q1 2027 — bench_tensor_dedicated_gates.cpp TN-BM-01..TN-BM-04 in place)
• harden long-run reliability under sustained tensor graph mutation/query traffic (Completed 2026-09-16 — test_tensor_store_soak.cpp)

Implementation Phases

Phase 1: Design / API Contract

• freeze tensor index/bridge/graph contracts for current major line (Completed 2026-07-29)
• define explicit error taxonomy for tensor incident classes (Completed 2026-07-29)

Phase 2: Core Implementation

• complete hardening for tensor index manager and bridge internals (Completed 2026-08-07)
• align fingerprint and dedup-adjacent behavior to bounded runtime contracts (Completed 2026-08-07)

Phase 3: Error Handling and Edge Cases

• standardize fail-safe behavior for bridge faults and graph export/replay errors (Completed 2026-08-07)
• unify diagnostics across index, bridge, and fingerprint incident classes (Completed 2026-08-07)

Phase 4: Tests

• expand focused regressions for tensor index/bridge and fingerprint edge scenarios (Completed 2026-07-29 — test_tensor_contract_hardening_focused.cpp, TNCH-01..TNCH-16)
• extend deterministic stress fixtures for concurrent tensor graph workloads (Completed 2026-07-29)

Phase 5: Performance and Hardening

• lock benchmark-backed release gates for tensor hot paths (Completed 2026-07-29 — bench_tensor_release_gates.cpp, TRNRG-01..TRNRG-06)
• validate p95/p99 and throughput behavior against release baselines (Completed 2026-08-07)

Phase 6: Documentation and Acceptance

• core tensor module docs aligned to source-verifiable behavior
• roadmap/future planning separated from historical changelog entries
• tensor_api_contract.h frozen contract header published (Completed 2026-07-29)

Production Readiness Checklist

• core tensor surfaces documented and source-verified
• module-level security and failure behavior documented
• benchmark mapping documented in performance expectations
• tensor_api_contract.h frozen contract header (Phase 1 closure, 2026-07-29)
• test_tensor_contract_hardening_focused.cpp — TNCH-01..TNCH-16 (Phase 4 closure, 2026-07-29)
• bench_tensor_release_gates.cpp — TRNRG-01..TRNRG-06 gate benchmarks (Phase 5 closure, 2026-07-29)
• remaining hardening tasks closed for index/bridge/graph edge paths (Phase 2 closure, 2026-08-07)
• release benchmark stabilization complete (Phase 5 closure, 2026-08-07)

Known Issues and Limitations

• runtime behavior depends on tensor workload shape and bridge/index configuration.
• selected advanced structural paths remain in active hardening status.
• benchmark depth should continue expanding for broader tensor workload patterns.

Wave 3 Gap-Closure Tracking (2026-08-31)

• [~] compression_strategy.cpp — TTDecompositionStrategy::compress() returns synthetic 2× ratio; not wired to real TensorTrainDecomposer. STUB #CS-01. Target Q2 2027.
• [~] compression_strategy.cpp — CompressionFactory::registerStrategy() is a no-op; strategy map not yet implemented. STUB #CS-02. Target Q2 2027.
• [~] tensor_routing_strategy.cpp — Freshness scoring in RankBasedPrioritization uses constant 1.0; created_at timestamp parsing not yet implemented. Target Q2 2027.
• [~] tensor_routing_strategy.cpp — Adaptive routing in AdaptiveLearningRouter::route() uses fixed heuristic; metrics-based learning loop not yet implemented. Target Q2 2027.

Breaking Changes

No breaking tensor 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 tensor

• Deliver or validate distributed tracing, high-cardinality stress coverage, exporter reliability, and operator remediation hints as applicable to this module (Completed 2026-09-16 — test_tensor_highcardinality_stress.cpp, bench_tensor_dedicated_gates.cpp, RUNBOOK_TENSOR_STORE.md)
• Contribute to or validate long-duration soak test coverage for this module's primary paths (Completed 2026-09-16 — tests/integration/test_tensor_store_soak.cpp)
• Ensure runbook coverage for operator-critical scenarios in this module (Completed 2026-09-16 — docs/operability/RUNBOOK_TENSOR_STORE.md)

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 (Completed 2026-09-16 — bridge routing and dedup error handling validated in soak/stress)
• [~] Benchmark-backed p95/p99 baselines exist on representative hardware (Target: Q1 2027 — bench_tensor_dedicated_gates.cpp TN-BM-01..TN-BM-04; hardware run required)
• Operator-critical paths have diagnostics, alerts, and runbooks (Completed 2026-09-16 — RUNBOOK_TENSOR_STORE.md)

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