---
phase: 17-kintsugi-aion-repair
verified: 2026-03-27T15:50:00Z
status: passed
score: 9/9 must-haves verified
re_verification: false
---

# Phase 17: Kintsugi Aion Repair Verification Report

**Phase Goal:** Kintsugi repairs Aion symbol gaps by reprocessing from the gap point forward, with TID-based writer boundaries instead of UTC day boundaries
**Verified:** 2026-03-27T15:50:00Z
**Status:** passed
**Re-verification:** No — initial verification

---

## Goal Achievement

### Observable Truths

| #   | Truth                                                                         | Status   | Evidence                                                                                                                                                |
| --- | ----------------------------------------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1   | Kintsugi discovers Stathera anomalies for Aion symbols using per-symbol mode  | VERIFIED | `discovery.py:183` — `sym_mode = _get_mode_for_symbol(sym)` inside `_discover_shards_stathera()` loop                                                   |
| 2   | Verify_repair uses per-symbol mode and skips day-mode oracle for Aion symbols | VERIFIED | `verify.py:30-76` — `ouroboros_mode = _get_mode_for_symbol(shard.symbol)`, branches on `== "day"` for oracle                                            |
| 3   | Telemetry logs per-symbol ouroboros_mode (not global)                         | VERIFIED | `telemetry.py:140` — `"ouroboros_mode": _get_mode_for_symbol(result.shard.symbol)`                                                                      |
| 4   | Dead-letter replay has zero ouroboros_mode references (mode-agnostic)         | VERIFIED | `grep -c` on `dead_letter.py` returns 0                                                                                                                 |
| 5   | Today-guard in `_repair()` is conditional: enforced for Day, skipped for Aion | VERIFIED | `repair.py:197-219` — guard wrapped in `if ouroboros_mode == "day":`, Aion dispatches before day-mode path                                              |
| 6   | Aion shard repair reprocesses from anchor TID forward, not by day-recompute   | VERIFIED | `repair.py:360-501` — `_repair_aion()` filters trades by `agg_trade_id > anchor_last_tid`                                                               |
| 7   | Aion repair uses a single continuous processor (no day-boundary reset)        | VERIFIED | `repair.py:440-444` — single `OpenDeviationBarProcessor` created for entire TID range                                                                   |
| 8   | Aion repair does NOT mark the last bar as orphan for interior gaps            | VERIFIED | `repair.py:473-477` — orphan marking is inside `if shard.is_genesis:` block only                                                                        |
| 9   | Day-mode repair is completely unchanged (backward compatible)                 | VERIFIED | `_try_parquet_day_replace`, `_try_vision_day_replace`, `_repair_under_lock` untouched; dispatch at line 213 falls through to day-mode path for non-Aion |

**Score:** 9/9 truths verified

---

### Required Artifacts

| Artifact                                        | Expected                               | Status   | Details                                                                                |
| ----------------------------------------------- | -------------------------------------- | -------- | -------------------------------------------------------------------------------------- |
| `python/opendeviationbar/kintsugi/_helpers.py`  | `_get_mode_for_symbol()` helper        | VERIFIED | Defined at line 66; uses `get_symbol_entries()` from registry                          |
| `python/opendeviationbar/kintsugi/discovery.py` | Per-symbol mode in Stathera discovery  | VERIFIED | Two call sites: line 183 (`_discover_shards_stathera`) and line 631 (`_enrich_shards`) |
| `python/opendeviationbar/kintsugi/verify.py`    | Per-symbol mode in verification        | VERIFIED | Line 30-32; `ouroboros_mode = _get_mode_for_symbol(shard.symbol)`                      |
| `python/opendeviationbar/kintsugi/telemetry.py` | Per-symbol mode in kintsugi_log writes | VERIFIED | Line 140; `_get_mode_for_symbol(result.shard.symbol)`                                  |
| `python/opendeviationbar/kintsugi/repair.py`    | Aion repair path via `_repair_aion()`  | VERIFIED | Function at line 360; dispatch at line 214; version string `kintsugi-aion` at line 486 |

---

### Key Link Verification

| From                    | To                                    | Via                           | Status | Details                                                                                                        |
| ----------------------- | ------------------------------------- | ----------------------------- | ------ | -------------------------------------------------------------------------------------------------------------- |
| `kintsugi/_helpers.py`  | `opendeviationbar/symbol_registry.py` | `get_symbol_entries()` lookup | WIRED  | `from opendeviationbar.symbol_registry import get_symbol_entries` at line 71                                   |
| `kintsugi/discovery.py` | `kintsugi/_helpers.py`                | `_get_mode_for_symbol` import | WIRED  | Import at line 124 and 614; called at lines 183, 631                                                           |
| `kintsugi/repair.py`    | `opendeviationbar/storage/parquet.py` | `TickStorage.read_ticks`      | WIRED  | `from opendeviationbar.storage.parquet import TickStorage` at line 14; used in `_repair_aion` at lines 381-400 |
| `kintsugi/repair.py`    | `opendeviationbar/processors/core.py` | `OpenDeviationBarProcessor`   | WIRED  | Lazy import at line 379 inside `_repair_aion`; instantiated at line 441                                        |

---

### Data-Flow Trace (Level 4)

Not applicable — this phase modifies gap-repair logic (control flow + data sourcing), not a rendering component. Data flow verification is behavioral: `_repair_aion()` reads from Parquet tick cache or REST and writes via `cache.store_bars_batch()` with `overlap_strategy="replace"`. Both code paths confirmed present and wired.

---

### Behavioral Spot-Checks

| Behavior                                           | Command                                                                                            | Result           | Status |
| -------------------------------------------------- | -------------------------------------------------------------------------------------------------- | ---------------- | ------ |
| `_get_mode_for_symbol('BTCUSDT')` returns `"aion"` | `uv run python -c "from ... import _get_mode_for_symbol; print(_get_mode_for_symbol('BTCUSDT'))"`  | `aion`           | PASS   |
| Unknown symbol returns safe default `"day"`        | Same import, call with `'UNKNOWNSYM'`                                                              | `day`            | PASS   |
| `_repair_aion` importable from `kintsugi.repair`   | `uv run python -c "from opendeviationbar.kintsugi.repair import _repair_aion; print('import ok')"` | `import ok`      | PASS   |
| All 4 modified modules importable together         | Combined import of `_helpers`, `repair`, `discovery`, `verify`                                     | `all imports ok` | PASS   |

---

### Requirements Coverage

| Requirement | Source Plan | Description                                                                         | Status    | Evidence                                                                                       |
| ----------- | ----------- | ----------------------------------------------------------------------------------- | --------- | ---------------------------------------------------------------------------------------------- |
| KINT-01     | 17-02       | Aion repair reprocesses from gap point forward (genesis-forward, not day-recompute) | SATISFIED | `_repair_aion()` at `repair.py:360`; TID-filter at lines 430-433; single processor at line 441 |
| KINT-02     | 17-01       | Writer ownership for Aion is TID-based; no today-guard for Aion symbols             | SATISFIED | `repair.py:197` — today-guard wrapped in `if ouroboros_mode == "day":`; Aion bypasses entirely |
| KINT-03     | 17-01       | Niffler/Charon dead-letter recovery remains wired and operational (mode-agnostic)   | SATISFIED | `dead_letter.py` has zero `ouroboros_mode` references (grep count: 0)                          |

No orphaned requirements — all three KINT requirements appear in plan frontmatter and are verified in codebase.

---

### Anti-Patterns Found

None. Grep for `TODO`, `FIXME`, `PLACEHOLDER` across all 5 modified files returned zero matches.

---

### Human Verification Required

None. All key behaviors are statically verifiable and the behavioral spot-checks passed. The Aion repair path (`_repair_aion`) exercises Parquet tick cache and REST fallback — both paths can only be exercised end-to-end with a live ClickHouse connection and real Aion shard data, but the code path logic, imports, and wiring are fully verified.

---

## Gaps Summary

No gaps. All 9 observable truths verified, all 5 required artifacts present and substantive, all 4 key links wired, all 3 KINT requirements satisfied, no anti-patterns detected, behavioral spot-checks pass.

---

_Verified: 2026-03-27T15:50:00Z_
_Verifier: Claude (gsd-verifier)_
