agentmods.dev

PostToolUse

An automatic check that runs after editing or writing files. It executes `validate-registry.mjs` with Node.js to validate the NucleoOS registry.

In plain words
What is it for?
Use it for automatic registry validation after Edit and Write tool calls.
Why use it?
It catches registry problems immediately after file changes, without requiring the agent to remember to run the check separately.

Hook for Claude Code

54 11d ago A scan tokens not measured no licence
View the source file indecenti/NucleoOs
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add hooks/indecenti/nucleoos/post-tool-use
Clone the repo
git clone --depth 1 https://github.com/indecenti/NucleoOs

Made for: Claude Code.

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. Scan, not verified.
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 · 15 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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.

  1. yesterday First seen · 15 lines scan A 44822e527216

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository indecenti/NucleoOs (54 stars, last pushed 11d ago), with no licence file. 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 2026-08-30.

Writing and docscardputerembeddedesp-idfesp32esp32-s3firmware
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Write, Bash, Edit and Write tool calls, executing check_forbidden_commands.py, check_test_file_pairing.py, protect_example_ino.py, check_pr_merge_reviews.py, rust_tool_guard.py, tdd_guard.py and protect_platform_headers.py (7 commands). From FastLED/FastLED.

FastLED/FastLED · not measured

PostToolUse

Runs after a tool call finishes for Edit and Write tool calls, executing lint-on-save.py, auto_test_suggest.py and compile_example.py (3 commands). From FastLED/FastLED.

FastLED/FastLED · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing git_context.py. From FastLED/FastLED.

FastLED/FastLED · not measured

Notification

Runs when the agent sends a notification, executing desktop_notify.py. From FastLED/FastLED.

FastLED/FastLED · not measured

Stop

Runs when the agent finishes a response, executing check-on-stop.py. From FastLED/FastLED.

FastLED/FastLED · not measured

SessionStart

Runs when a session starts, executing check-on-start.py. From FastLED/FastLED.

FastLED/FastLED · not measured