Pkg
Stats

npm package discovery and stats viewer.

Discover Tips

General search
[free text search, go nuts!]
Package details
pkg:[package-name]
User packages
@[username]

Sponsor

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Twitter
@PkgStats
GitHub
pkgstats
Twitter
@ryanhefner
GitHub
ryanhefner
Site
ryanhefner.com

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

Framework
react / react-dom
Server
next / express / next-routes
Data Store
redux / react-redux / next-redux-wrapper / redux-thunk / redux-logger
Caching
lru-cache
CSS / Styling
next-page-transitions / styled-components
Typeface
@ibm/plex
Avatars
gravatar
Data Viz
chart.js / react-sparklines
Date formatting
dayjs
Infinite scrolling
react-scroll-trigger
Markdown rendering
react-markdown
Repository url parsing
hosted-git-info
User data
npm-user
Compiling
babel-plugin-module-resolver / babel-plugin-styled-components
Types
prop-types
Odds & Ends
es6-promise / isomorphic-fetch

© 2026 – Pkg Stats / Ryan Hefner

@jc4649/pi-toolcall-guard

v0.1.0

Published

9 hours ago

Deterministic tool-call guard for pi: path preflight, schema/repair, content rules, error enrichment, and destructive-bash blocking (interactive confirm + headless subagent hard-block)

0High
0Medium
0Low

pi-package pi coding-agent extension toolcall-guard

@jc4649/pi-toolcall-guard

A deterministic tool-call guard for the pi coding agent. Intercepts every tool call (tool_call hook) and applies layered protection, then enriches errors on the way back.

Layers

Destructive-bash guard — analyzes bash commands for risk (rm/dd/format, sudo, force-push, disk/infra teardown, pipe-to-shell). In an interactive session, prompts the user to confirm high-risk commands (ctx.ui.confirm); in a headless subagent, hard-blocks catastrophic operations.
Nudge — redirects bash cat/grep/sed/etc. to the dedicated read/grep tools when they exist.
Path preflight — normalizes file paths in place, or blocks paths escaping the workspace.
Repair + schema — fixes common malformed inputs (null optionals, unknown params) and validates against the tool schema before the call runs.
Content rules — loads rule files from <cwd>/.pi/guard-rules/ and blocks/reminds based on content patterns; also watches the output stream in real time for prose-rule violations.

On the way back it enriches error results (e.g. SQLite UNIQUE constraint → actionable guidance).

Configuration

PI_GUARD_DIR — artifact dir (default <cwd>/.pi/guard).
PI_GUARD_STREAM=0 — disable real-time stream watching.
--bash-guard-auto-allow — allow high-risk bash when no UI is available (non-interactive).

Install

pi install @jc4649/pi-toolcall-guard

MIT