Phase 23: Optimization architecture cleanup

[jununfly]

This was generated by AI during triage.

What to track

Track Phase 23: Optimization Architecture Cleanup.

Plan document:

• docs/plans/2026-06-18-rust-indexing-core-phase-23-optimization-architecture-cleanup.md

This phase governs post-PRD Rust indexing optimization technical debt. Its purpose is to make the next #165 optimization iteration faster, clearer, and more likely to target the real blocker before continuing with more isolated performance work.

This tracker does not replace #165 and must not close #165.

Acceptance criteria

• Track evidence pipeline contract cleanup.
• Track experiment/candidate inventory classification.
• Track production boundary cleanup for performance paths.
• Track targeted smoke/profile validation.
• Track next-candidate decision and manual Post-PRD optimization tracker for Rust indexing performance #165 update.
• Ensure default user-visible indexing behavior does not change.
• Ensure SQLite schema and MCP behavior do not change.
• Ensure installer, packaging, release, status, and npm smoke paths remain untouched unless separately approved.
• Ensure no full VS Code sparse scoreboard is run by default.
• Ensure no Rust default rollout readiness is claimed.

Blocked by

None - can start immediately.

[jununfly]

This was generated by AI during triage.

Phase 23 has been split into implementation issues:

• Phase 23.1: Clean up evidence pipeline contract #219 — Phase 23.1: Clean up evidence pipeline contract
• Phase 23.2: Inventory performance experiment candidates #220 — Phase 23.2: Inventory performance experiment candidates
• Phase 23.3: Clean up performance production boundaries #221 — Phase 23.3: Clean up performance production boundaries
• Phase 23.4: Run targeted optimization cleanup smoke #222 — Phase 23.4: Run targeted optimization cleanup smoke
• Phase 23.5: Decide next post-PRD optimization step #223 — Phase 23.5: Decide next post-PRD optimization step

Dependency order:

• Phase 23.1: Clean up evidence pipeline contract #219 can start immediately.
• Phase 23.2: Inventory performance experiment candidates #220 is blocked by Phase 23.1: Clean up evidence pipeline contract #219.
• Phase 23.3: Clean up performance production boundaries #221 is blocked by Phase 23.2: Inventory performance experiment candidates #220.
• Phase 23.4: Run targeted optimization cleanup smoke #222 is blocked by Phase 23.3: Clean up performance production boundaries #221.
• Phase 23.5: Decide next post-PRD optimization step #223 is blocked by Phase 23.4: Run targeted optimization cleanup smoke #222.

Guardrails:

• Do not close Post-PRD optimization tracker for Rust indexing performance #165 from Phase 23.
• Do not claim Rust default rollout readiness.
• Do not run a full VS Code sparse scoreboard by default.
• Do not change default user-visible indexing behavior, SQLite schema, or MCP behavior.

[jununfly]

This was generated by AI during triage.

Completed as part of Phase 23.

Summary:

• Evidence output now includes an explicit local-only Evidence Contract section.
• RSS unavailable reasons are now surfaced in generated comparison output.
• Performance experiment paths are inventoried as production path, retained diagnostic, or dead candidate.
• Production cleanup stayed on the benchmark/evidence boundary and did not change default indexing behavior.
• Targeted smoke/profile artifacts were generated from existing Phase 22 evidence; no full VS Code sparse scoreboard was run.
• Profile Rust parseExtractionMs before next optimization #224 was created as the next Post-PRD optimization tracker for Rust indexing performance #165 step for parseExtractionMs profiling.

Artifacts:

• docs/benchmarks/2026-06-18-rust-indexing-core-phase-23-experiment-inventory.md
• docs/benchmarks/2026-06-18-rust-indexing-core-phase-23-targeted-evidence-smoke-comparison.md
• docs/benchmarks/2026-06-18-rust-indexing-core-phase-23-targeted-evidence-smoke-decision-draft.md
• docs/benchmarks/2026-06-18-rust-indexing-core-phase-23-closeout-decision.md

Validation:

• npx vitest run __tests__/rust-indexing-evidence.test.ts
• npx vitest run __tests__/rust-indexing-evidence.test.ts __tests__/rust-indexing-experiment.test.ts
• npm run build

#165 remains open. Rust default rollout readiness is not claimed.