---
gsd_state_version: 1.0
milestone: v1.2
milestone_name: milestone
status: completed
last_updated: "2026-03-20T09:08:45.407Z"
progress:
  total_phases: 4
  completed_phases: 4
  total_plans: 5
  completed_plans: 5
---

# Project State: v1.2 — Performance

**Initialized:** 2026-03-20
**Status:** v1.2 milestone complete

---

## Phase Summary

| Phase | Name                          | Status      | Requirements |
| ----- | ----------------------------- | ----------- | ------------ |
| 1     | Telegram Thread Leak Fix      | Not Started | STAB-01..02  |
| 2     | Kintsugi REST + CH Connection | Not Started | STAB-03..06  |
| 3     | Rust Hot Path Optimization    | Not Started | RUST-01..03  |
| 4     | Python Efficiency             | Not Started | PYEF-01..03  |

---

## Blockers

None.

## Decisions Made

| Decision               | Rationale                                                    | Date       |
| ---------------------- | ------------------------------------------------------------ | ---------- |
| Skip research          | 5-agent audit already complete with exact file/line findings | 2026-03-20 |
| P9 out of scope        | OpenDeviationBar struct split is a major refactor            | 2026-03-20 |
| All phases independent | No dependencies between phases — can parallelize             | 2026-03-20 |

---

_Last updated: 2026-03-20 — milestone initialized_

- [Phase 01]: ThreadPoolExecutor over queue.Queue: simpler, 2-thread cap sufficient
- [Phase 02]: Thread-local CH cache reuses one connection per worker thread lifetime (proven pattern from repair_direct_parquet.py)
- [Phase 02]: 3-tier concurrency: Parquet (64 workers) / Vision (24 workers) / REST (2 workers) prevents budget dilution
- [Phase 03]: Reuse Vec via clear() instead of drop+realloc for hot-path burst frame
- [Phase 03]: Used (f64 * SCALE).round() for from_f64 — .round() critical for IEEE 754 correctness
- [Phase 03]: Cached decompressed CSV bytes (Approach B) over byte-offset seeking — simpler, eliminates dominant ZIP decompression cost
- [Phase 04]: Dynamic Vision TTL uses 2-day window (15min for recent, 1h for older)
- [Phase 04]: Removed bars.copy() — store_bars_bulk() is terminal consumer
