# Blunder Backfill

> Re-annotate recent games with outdated or missing blunder analysis. Use when users ask to backfill or refresh blunder annotations.

- Skill: `majiayu000/blunder-backfill` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/blunder-backfill`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/blunder-backfill/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/blunder-backfill

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# Blunder Backfill

Re-annotate games that have outdated or missing blunder analysis.

Run the backfill script on the most recent N outdated games (default 10):

```bash
uv run --project puppeteer python scripts/analysis/toolbox/backfill_annotations.py [N]
```

The script:

- Finds games with `blunderScriptVersion` older than current (or missing annotations)
- Processes them most-recent-first
- Runs full per-decision Sonnet 4.5 analysis on each
- Prints a cost breakdown per game

Requires `OPENROUTER_API_KEY` environment variable.

If the user specifies a number, pass it as the argument. Otherwise use the default (10).