It is for running the listed draft, trace, gate, and input-check scripts after selected tool calls.

It can apply project checks consistently after those calls instead of relying on someone to remember each command. The input does not explain what the scripts check.

How BeyondTheProtocol/polaris configures Claude Code

polaris: Hook for Claude Code

.claude/settings.json

PostToolUse is a hook for Claude Code from BeyondTheProtocol/polaris. Its token cost is not measured, scanned A, original, AGPL-3.0.

An after-tool hook that runs several checking scripts after selected agent or task calls finish. A hook is an automatic action attached to another operation.

In plain words

What is it for?: It is for running the listed draft, trace, gate, and input-check scripts after selected tool calls.
Why use it?: It can apply project checks consistently after those calls instead of relying on someone to remember each command. The input does not explain what the scripts check.

Written for Claude Code: installed under .claude/.

This is BeyondTheProtocol/polaris's own configuration. It tells Claude Code how to work on polaris itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything polaris configures →

One of 9 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 8 are separate, each on its own page.

Reuse

Borrowing it

Nothing to install: this file belongs to BeyondTheProtocol/polaris. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/BeyondTheProtocol/polaris/master/.claude/settings.json

Clone the repo

git clone --depth 1 https://github.com/BeyondTheProtocol/polaris

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/beyondtheprotocol/polaris/post-tool-use/github.svg)](https://agentmods.dev/hooks/beyondtheprotocol/polaris/post-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/beyondtheprotocol/polaris/post-tool-use"><img src="https://agentmods.dev/badge/hooks/beyondtheprotocol/polaris/post-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/beyondtheprotocol/polaris/post-tool-use"><img src="https://agentmods.dev/badge/hooks/beyondtheprotocol/polaris/post-tool-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Security

Grade A, and why

PostToolUse scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/settings.json · 47 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Same file

What else `settings.json` configures

This page is one entry in a file that holds 9. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 47 lines scan A bc78b2683028

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository BeyondTheProtocol/polaris (49 stars, last pushed 21d ago), licensed AGPL-3.0. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-07.

Building agents agentic-systems ai-agents cancer-research llm-orchestration open-science

PostToolUse next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
PostToolUseBeyondTheProtocol/polaris	Hook	49	21d ago	AGPL-3.0	A	—	Claude Code
SessionEndyukakust/joinmultiplayer.ai	Hook	0	2mo ago	MIT	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	today	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	today	Apache-2.0	A	—	Claude Code
PostToolUseanthropics/claude-plugins-official	Hook	46k	today	Apache-2.0	A	—	Claude Code