What is fast-jev-compaction?
fast-jev-compaction is a Claude Code mod by tamaratran that verbatim Jev-guided compaction for Claude Code sessions. It is listed under Context & memory and has 7,688 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | tamaratran |
| Repository | tamaratran/fast-jev-compaction |
| Popularity | 7,688 GitHub stars |
| Category | Context & memory |
| Security | Review before installing (72/100) |
| Rank | #49 of 5,272 Claude Code mods; #4 in Context & memory |
| License | MIT |
| Last commit | 2026-09-18 |
| Stars this week | +106 |
| Hooks | 2 events |
| Sees | compaction |
| Draws on | nothing |
Is fast-jev-compaction safe to install?
fast-jev-compaction scores 72/100 on the MCPMods security check: Review before installing. Things to review: sends data over the network; reads environment variables. 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 |
|---|---|
| Sends data over the network | Review |
| Starts no processes | Pass |
| Writes no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Validator reported problems | Note |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.env.get | reads env vars |
$.http.fetch | network requests |
$.session.compact | drives Claude |
$.session.usage | |
$.settings.read | reads settings |
$.ui.log | draws interface |
$.ui.toast | draws interface |
How do I install fast-jev-compaction?
- 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/tamaratran/fast-jev-compaction claude plugin validate ./fast-jev-compaction/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add tamaratran/fast-jev-compaction && claude plugin install fast-jev-compaction@fast-jev-compaction
Or ask Claude to set it up
Paste this into Claude Code and it installs fast-jev-compaction for you:
Install the "fast-jev-compaction" Claude Code mod from https://github.com/tamaratran/fast-jev-compaction. Run claude plugin validate on it first and show me what it can access before you enable it.