memory-doctor — keep agent memory healthy

Memory skills write memory; almost none maintain it. Over time a store grows long, contradicts itself, sprouts dead links, and its index drifts — the agent then burns tokens parsing stale history instead of acting. That is context rot. This skill governs an existing store; it does not produce memory.

Producers write, memory-doctor keeps it alive. Complements memory skills, doesn't replace them. Source & issues: \x3Chttps://github.com/casperkwok/memory-doctor>

When to use

• A memory store exists (a MEMORY.md + *.md notes, or a *.mneme file) and the user wants to check or clean it: "记忆体检 / 整理记忆 / memory health / cleanup / dedup / fix the index".
• Memory has clearly grown long, repetitive, or the index no longer matches the files.

How to run (zero deps, Python ≥ 3.9)

# read-only — safe anytime; print the health card first
python scripts/curate.py report --dir \x3Cmemory-dir>

# auto-memory only: preview then apply the index reconciliation (snapshots first)
python scripts/curate.py lint --dir \x3Cmemory-dir>
python scripts/curate.py lint --dir \x3Cmemory-dir> --fix

# revert the last write
python scripts/curate.py undo --dir \x3Cmemory-dir>

The format is auto-detected (*.mneme present → mneme, else auto-memory); override with --format auto-memory|mneme.

What the report checks

• dead links, stale notes, oversized files, lexical duplicate candidates, and a freshness score (per-type exponential decay).
• auto-memory: index drift (MEMORY.md vs files) and orphans (no inbound link, unindexed).
• mneme: history cells (superseded/retired/proposed) excluded from active health, and supersede back-link symmetry; freshness uses each cell's seen date.

What it fixes (v0.1 — deterministic & reversible only)

• Index reconciliation (auto-memory): add missing MEMORY.md entries, drop dangling ones, preserving your hand-written hooks. A full-directory snapshot is taken first; undo reverts.
• mneme's spine is derived, so there is no index to reconcile — use report.

Semantic fixes that need a model — true duplicate merge, contradiction reconcile, oversized compaction — are flagged in v0.1 and resolved in v0.2 (no embeddings; manual-apply, snapshot-backed). Never auto-edit memory content on the user's behalf without confirmation.

Safety

Every write snapshots the whole directory to .memory-doctor/snapshots/\x3Cts>/ and logs to .memory-doctor/changelog.md; undo restores it. v0.1 only ever rewrites the index file.

Optional: a read-only health nudge

hooks/health_nudge.py (in the repo) can be wired to a Claude Code SessionStart hook to print a one-line nudge when health drops. It is read-only and never edits anything. Opt-in.