claude-forge: Hook for Claude Code

.claude/settings.json

PostToolUse is a hook for Claude Code from ForgeyClap/claude-forge. Its token cost is not measured, scanned A, original, MIT.

A post-tool hook that runs a Node.js script after each tool call finishes.

In plain words
What is it for?
It is for running the configured forge-toolhook.cjs script after completed tool calls.
Why use it?
It lets a project perform follow-up processing automatically after an agent uses a tool, without requiring a separate manual step.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PROJECT_DIR variable. Also seen: names the NotebookEdit tool.

This is ForgeyClap/claude-forge's own configuration. It tells Claude Code how to work on claude-forge 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 claude-forge configures →

One of 5 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 4 are separate, each on its own page.

Reuse

Borrowing it

Nothing to install: this file belongs to ForgeyClap/claude-forge. 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/ForgeyClap/claude-forge/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/ForgeyClap/claude-forge

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.

agentmods badge for PostToolUse

README.md
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Your own site
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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.

agentmods 80×15 button for PostToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/forgeyclap/claude-forge/post-tool-use"><img src="https://agentmods.dev/badge/hooks/forgeyclap/claude-forge/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 original 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 1mo ago.

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 · 26 lines

What it actually says

{
  "PostToolUse": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "node \"$CLAUDE_PROJECT_DIR/.claude/forge-bin/forge-toolhook.cjs\"",
          "timeout": 10
        }
      ],
      "matcher": "Write|Edit|MultiEdit|NotebookEdit|Bash",
      "_matcher_doc": "2026-09-23 (external audit II-D): shipped without a matcher, so it fired on EVERY tool call of every agent (461 in one audited session, ~56 ms each) and logged 320 paths outside the project. The ledger exists to record what CHANGED; reads are noise. Opt out entirely by deleting this entry — nothing else depends on it."
    },
    {
      "hooks": [
        {
          "type": "command",
          "command": "node \"$CLAUDE_PROJECT_DIR/.claude/forge-bin/forge-toolhook.cjs\"",
          "timeout": 10
        }
      ],
      "matcher": "PowerShell",
      "_matcher_doc": "v2.8.0 (fresh-laptop audit N8): the tool ledger missed every Windows shell call because the matcher above has Bash but not PowerShell. A SEPARATE entry (not an edit of the matcher above) so an upgrade merges cleanly and nothing fires twice."
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 5. 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.

  1. 1mo ago Changed · +11 lines 9dae089a88b1
  2. 1mo ago Changed 8490bbb04e7a
  3. 1mo ago Changed · +2 lines 8da9bb8f423f
  4. 2mo ago First seen · 13 lines scan A f8056c1ce120

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository ForgeyClap/claude-forge (2 stars, last pushed 29d ago), licensed MIT. 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 2026-08-31.