Claude Code mod
tdd-mod
Blocks file writes that break Red-Green-Refactor on coding tasks (port of probity's enforceTdd).
Install
/plugin marketplace add koslowskyj/tdd-mod
/plugin install tdd-mod@tdd-modMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L2Writes or runs: drives Claude, reads files, reads the transcript, draws
- Sees
- every prompt, subagent spawns, Write calls, Edit calls, Bash calls, NotebookEdit calls
- Hooks
session.startcommand.runprompt.submitagent.spawnturn.completeturn.steptool.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
- koslowskyj/tdd-mod
- Folder
.- Marketplace
tdd-mod- Author
- koslowskyj
- License
- MIT
- Last updated
- 22 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is tdd-mod?
Blocks file writes that break Red-Green-Refactor on coding tasks (port of probity's enforceTdd). It is a mod for Claude Code, from koslowskyj/tdd-mod on GitHub.
What can the tdd-mod mod access?
Its widest reach is "writes or runs" (drives Claude, reads files, reads the transcript, draws). It sees every prompt, subagent spawns, Write calls, Edit calls, Bash calls, NotebookEdit calls. Like any mod, it runs with your permissions.
How do I install tdd-mod?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add koslowskyj/tdd-mod and then /plugin install tdd-mod@tdd-mod.
Is tdd-mod popular?
koslowskyj/tdd-mod has 4 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 22 October 2026.
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