What is compact-lens?
compact-lens is a Claude Code mod by ewanlimr25 that see what a compaction takes away and what it leaves, pin facts that must survive it, and edit the summary afterwards. It is listed under Context & memory and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | ewanlimr25 |
| Repository | ewanlimr25/compact-lens |
| Popularity | no public popularity data yet |
| Category | Context & memory |
| Security | Review before installing (64/100) |
| Rank | #3,172 of 5,272 Claude Code mods; #293 in Context & memory |
| License | MIT |
| Last commit | 2026-10-08 |
| Hooks | 9 events |
| Sees | compaction, every prompt, mcp__compact-lens__apply calls, mcp__compact-lens__keep calls |
| Draws on | Pane |
Is compact-lens safe to install?
compact-lens scores 64/100 on the MCPMods security check: Review before installing. Things to review: writes files or config; reads environment variables; watches every prompt or event. It passed 5 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts no processes | Pass |
| Writes files or config | Review |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.read | reads files |
$.fs.write | writes files |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.session.append | |
$.session.id | |
$.session.messages | reads the transcript |
$.session.usage | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.tool.register | drives Claude |
$.ui.close | draws interface |
$.ui.log | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
How do I install compact-lens?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/ewanlimr25/compact-lens claude plugin validate ./compact-lens/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add ewanlimr25/compact-lens && claude plugin install compact-lens@compact-lens
Or ask Claude to set it up
Paste this into Claude Code and it installs compact-lens for you:
Install the "compact-lens" Claude Code mod from https://github.com/ewanlimr25/compact-lens. Run claude plugin validate on it first and show me what it can access before you enable it.