Claude Code mod
jev-eval-observer
Pass-through evaluation instrumentation; never changes tool results.
Install
git clone https://github.com/tamaratran/jev-pruner.git
claude --plugin-dir ./jev-pruner/evals/observerThe repo has no marketplace file, so load the plugin folder directly with --plugin-dir.
What it can access
- Reach
- L2Writes or runs: writes files
- Sees
- Bash calls
- Hooks
session.starthttp.fetchui.logfs.writetool.call
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
- tamaratran/jev-pruner
- Folder
evals/observer- Type
- Workflow mods
- License
- MIT
- Last updated
- 30 September 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is jev-eval-observer?
Pass-through evaluation instrumentation; never changes tool results. It is a mod for Claude Code, from tamaratran/jev-pruner on GitHub.
What can the jev-eval-observer mod access?
Its widest reach is "writes or runs" (writes files). It sees Bash calls. Like any mod, it runs with your permissions.
How do I install jev-eval-observer?
Clone tamaratran/jev-pruner and start Claude Code with --plugin-dir pointing at the mod's folder (evals/observer).
Is jev-eval-observer popular?
tamaratran/jev-pruner has 166 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 30 September 2026.
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