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Runtime failure resolution for coding agents. Hooks into Claude Code and Codex. Catches loops, dangerous actions, and secret leaks before they become incidents. Zero latency. Runs locally.

Supported agent CLIs

Install

npm install -g failproofai
failproofai policies --install   # or just run `failproofai` and accept the first-run prompt
failproofai

30 built-in policies activate immediately. Dashboard at localhost:8020. Disable the first-run prompt with FAILPROOFAI_NO_FIRST_RUN=1.

What it stops

Policy	What it blocks
`block-push-master`	Direct pushes to `main` / `master`
`block-force-push`	`git push --force`
`block-work-on-main`	Commits, merges, rebases on `main` / `master`
`block-rm-rf`	Recursive file deletion
`sanitize-api-keys`	API keys leaking into agent context

→ All 30 built-in policies

Your own policies

Drop a file into .failproofai/policies/ — it loads automatically, no flags needed. Commit it and the whole team gets it on next pull.

import { customPolicies, deny, allow } from "failproofai";

customPolicies.add({
  name: "no-production-writes",
  match: { events: ["PreToolUse"] },
  fn: async (ctx) => {
    if (ctx.toolInput?.file_path?.includes("production"))
      return deny("Writes to production paths are blocked.");
    return allow();
  },
});

Three decisions available to every policy:

Decision	Effect
`allow()`	Permit the operation
`deny(message)`	Block it — message goes back to the agent
`instruct(message)`	Let it through, but add context to the agent's next prompt

→ Custom policies guide

Session visibility

Every tool call your agent makes is logged locally. The dashboard shows what ran, what was blocked, and what the policy told the agent — so you're not guessing when something goes wrong. → Dashboard guide

Documentation


Getting Started	Installation and first steps
Built-in Policies	All 30 policies with parameters
Custom Policies	Write your own
Configuration	Config scopes and merge rules
Dashboard	Session monitor and policy activity
Architecture	How the hook system works

License

MIT with Commons Clause — free for internal and personal use; commercial resale of failproofai itself requires a separate agreement. See LICENSE for the full text.

Contributing

See CONTRIBUTING.md. New policies, edge cases, and translations all welcome.

Build before you start. Run bun install && bun run build first. This repo runs failproofai's own hooks on itself, and they resolve the failproofai import against the compiled dist/ bundle — without a build you'll hit Cannot find package 'failproofai' hook errors. Rebuild after changing src/. See Build before the in-repo dev hooks will work.

Built by Nivedit Jain and Nikita Agarwal. befailproof.ai

FailproofAI: Runtime Failure Resolution for Coding Agents

README