# Phase 3: Sub-Minute Startup Validation — Summary

**Plan:** 03-01 (operational deploy + measurement)
**Duration:** ~10 min (deploy + timing)
**Tasks:** 1 (deploy + measure)

## What was done

1. Deployed Phase 1 + 2 changes to bigblack via hotfix path (git sync + rsync)
2. Restarted sidecar and measured startup timing from systemd journal logs
3. Verified yesterday integrity check runs correctly (16 symbols flagged via signal file)
4. Started kintsugi which consumed the signal file and began repairs
5. Fixed `is_genesis=True` bug discovered during validation (1-line fix)

## Timing Results

| Step                               | Timestamp | Elapsed |
| ---------------------------------- | --------- | ------- |
| systemd Started                    | 08:39:15  | 0s      |
| WS connected + first data          | 08:39:18  | 3s      |
| Yesterday integrity check complete | 08:39:42  | 27s     |
| Signal file written                | 08:39:42  | 27s     |

**Target: < 60s. Actual: 27s to integrity check + signal.**

## Commits

- `a8afa51` docs(03): context for sub-minute startup validation
- `7988830` fix(kintsugi): set is_genesis=True for yesterday signal shards

## Requirements

| REQ-ID     | Status                 |
| ---------- | ---------------------- |
| STARTUP-04 | Met (27s < 60s target) |
