What is lcm?
lcm is a Claude Code mod by lossless-claude that lossless context management — DAG-based summarization that preserves every message. It is listed under Context & memory and has 56 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | lossless-claude |
| Repository | lossless-claude/lcm |
| Popularity | 56 GitHub stars |
| Category | Context & memory |
| Security | High risk (32/100) |
| Rank | #232 of 5,272 Claude Code mods; #23 in Context & memory |
| License | MIT |
| Last commit | 2026-10-03 |
| Stars this week | +2 |
| Hooks | 14 events |
| Sees | classic hooks, compaction, every prompt, every tool call, the system prompt |
| Draws on | nothing |
Is lcm safe to install?
lcm scores 32/100 on the MCPMods security check: High risk. Things to review: sends data over the network; starts processes outside the sandbox; writes files or config; reads environment variables; watches every prompt or event. It passed 1 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 |
|---|---|
| Sends data over the network | Review |
| Starts processes outside the sandbox | Review |
| Writes files or config | Review |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| Drives Claude (model calls, prompts) | Note |
| Validator reported problems | Note |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.clock.sleep | |
$.env.get | reads env vars |
$.fs.write | writes files |
$.http.fetch | network requests |
$.model.complete | drives Claude |
$.model.fork | drives Claude |
$.process.run | runs processes |
$.session.cwd | |
$.session.id | |
$.session.model | |
$.ui.log | draws interface |
How do I install lcm?
- 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/lossless-claude/lcm claude plugin validate ./lcm/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
git clone https://github.com/lossless-claude/lcm && claude --plugin-dir ./lcm/.
Or ask Claude to set it up
Paste this into Claude Code and it installs lcm for you:
Install the "lcm" Claude Code mod from https://github.com/lossless-claude/lcm. Run claude plugin validate on it first and show me what it can access before you enable it.