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---
name: drift_summary
status: codified
version: 1.0.0
tier: episodic
description: Summarize last 7 days of compass drift events · alert distribution + top 5 negative drifts · pure read-only · NO LLM.
inputs:
- lookback_days (int, default 7): days back to scan
- drift_log_path (path, optional): override default .cache/drift_history.jsonl
outputs:
- total_events
- alert_counts (by level: green/yellow/red)
- top_negative_drifts (list of {score, prompt_excerpt, ts})
- first_seen_ts
- last_seen_ts
---
# drift_summary
Read `~/.claude/plugins/nautilus-compass/.cache/drift_history.jsonl` (or
override path) and aggregate the last N days of drift events.
## When to use
- Weekly review: "where am I drifting recently?"
- Pre-ship audit: "any red alerts in the last 24h?"
- Anchor reset: "what's the top neg-hit signal across recent prompts?"
## Why codified (not prototype)
- 7+ runs over multiple weeks (5/04, 5/12, 5/17 etc · 每次 user 问 drift 摘要)
- Pure read-only · no side effects · cannot regress
- Deterministic output schema · easy to assert in smoke tests