Claude Code mod
context-lab
Context architecture profiler for Claude Code: what context Claude receives, where it comes from, and whether it earns its cost.
Install
/plugin marketplace add EsenssiAromasDev/context-lab
/plugin install context-lab@context-labMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- Unknown
- Sees
- the system prompt, Read calls, every skill, subagent spawns
- Draws in
AbovePromptPane- Hooks
session.startprompt.contextprompt.attachmenttool.callskill.promptagent.spawnsession.measurecommand.runui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- EsenssiAromasDev/context-lab
- Folder
.- Marketplace
context-lab- Author
- jairogelpi
- Last updated
- 7 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is context-lab?
Context architecture profiler for Claude Code: what context Claude receives, where it comes from, and whether it earns its cost. It is a mod for Claude Code, from EsenssiAromasDev/context-lab on GitHub.
What can the context-lab mod access?
Its reach could not be worked out from its code. It sees the system prompt, Read calls, every skill, subagent spawns. It draws in AbovePrompt, Pane. Like any mod, it runs with your permissions.
How do I install context-lab?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add EsenssiAromasDev/context-lab and then /plugin install context-lab@context-lab.
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Browse the most popular Claude Code mods, all context & usage mods, or the skills and MCP server directories.