What is context-lab?
context-lab is a Claude Code mod by EsenssiAromasDev that context architecture profiler for Claude Code: what context Claude receives, where it comes from, and whether it earns its cost. It is listed under Cost & usage and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | EsenssiAromasDev |
| Repository | EsenssiAromasDev/context-lab |
| Popularity | no public popularity data yet |
| Category | Cost & usage |
| Security | Review before installing (68/100) |
| Rank | #3,159 of 5,272 Claude Code mods; #571 in Cost & usage |
| Last commit | 2026-10-07 |
| Hooks | 9 events |
| Sees | Read calls, every skill, subagent spawns, the system prompt |
| Draws on | AbovePrompt, Pane |
Is context-lab safe to install?
context-lab scores 68/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; writes files or config. It passed 4 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 processes outside the sandbox | Review |
| Writes files or config | Review |
| Doesn't read environment variables | Pass |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Validator reported problems | Note |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.clock.now | |
$.command.register | |
$.fs.ancestors | reads files |
$.fs.exists | reads files |
$.fs.list | reads files |
$.fs.read | reads files |
$.fs.write | writes files |
$.process.run | runs processes |
$.session.root | |
$.session.surfaces | |
$.session.usage | |
$.session.version | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.log | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
How do I install context-lab?
- 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/EsenssiAromasDev/context-lab claude plugin validate ./context-lab/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add EsenssiAromasDev/context-lab && claude plugin install context-lab@context-lab
Or ask Claude to set it up
Paste this into Claude Code and it installs context-lab for you:
Install the "context-lab" Claude Code mod from https://github.com/EsenssiAromasDev/context-lab. Run claude plugin validate on it first and show me what it can access before you enable it.