Claude Code mod

prompt-guard

Stops prompts that contain API keys or passwords (puts a redacted copy back in the input box) and drops the same message re-sent within a few minutes.

Guard & safety mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code
/plugin marketplace add AbyssCN/claude-lead-harness
/plugin install prompt-guard@claude-lead-harness

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach
L1Reads: writes the prompt box, reads mod state
Sees
every prompt
Hooks
prompt.submit

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.
Claude Code docs

Details

Repository
AbyssCN/claude-lead-harness
Folder
mods/prompt-guard
Marketplace
claude-lead-harness
Type
Guard & safety mods
License
MIT
Last updated
10 October 2026
Listed in
awesome-claude-code-mods

FAQ

What is prompt-guard?

Stops prompts that contain API keys or passwords (puts a redacted copy back in the input box) and drops the same message re-sent within a few minutes. It is a mod for Claude Code, from AbyssCN/claude-lead-harness on GitHub.

What can the prompt-guard mod access?

Its widest reach is "reads" (writes the prompt box, reads mod state). It sees every prompt. Like any mod, it runs with your permissions.

How do I install prompt-guard?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add AbyssCN/claude-lead-harness and then /plugin install prompt-guard@claude-lead-harness.

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