Claude Compact Keeper — Development skill for Claude Code

compact-keeper

A Claude Code mod that makes compaction keep what matters: your goal, your own words, the files touched and the open work, plus a full markdown copy of the conversation before it was compacted.

compacted — kept goal, 1 note, 14 prompts, 6 files · archive saved

Right after the summary, the model reads a card like this:

[compact-keeper] What the user asked for before this compaction, kept word for word ...

## Goal
Migrate the billing service to the new Stripe API, keep the v1 webhooks working

## Notes the user pinned with /keep
- Never push to main

## User prompts, oldest first (last 14)
- Do not touch the tests folder
- ...

## Files edited or created
- /repo/billing/api.py
- /repo/billing/stripe_v2.py

## Open todos
- [in_progress] Port refunds

## Full transcript before compaction
/Users/you/.claude/compact-keeper/-Users-you-repo//2026-10-06T12-00-00Z.md
Read it when a detail is missing from the summary.

Why

After a compaction Claude "forgets everything": the summary drops the goal, the constraints you set, the decisions and the file paths, and the conversation before it can't be viewed again.

• GitHub: #17428, #27242 and #7530, together about 280 👍 and 200 comments (checked 2026-10-06).
• Reddit: compacting a 900k session (1.1k upvotes) and a second thread.
• Hacker News: the discussion.

Existing fixes work around compaction rather than inside it: claude-mem keeps memory across sessions, which is a different job, and PreCompact shell hooks can only run a script beside it. This mod hooks the compaction itself (`session.compact`), so it can change what the summarizer is told and wh