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second-brain: Hook for Claude Code

.claude/settings.json

PostToolUse is a hook for Claude Code from slowww-ai/second-brain. Its token cost is not measured, scanned A, original, MIT.

A post-action hook configuration that runs a reindexing script after files in a wiki's notes folder are written or edited. Reindexing updates the wiki's searchable index.

In plain words
What is it for?
Use it in a second-brain wiki to trigger reindex.py after note edits, using the project's virtual-environment Python when available and falling back to python3.
Why use it?
It keeps the index current after note changes, so newly added or edited notes can be found without a separate manual reindex step.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PROJECT_DIR variable.

This is slowww-ai/second-brain's own configuration. It tells Claude Code how to work on second-brain 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 second-brain configures →

One of 3 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 2 are separate, each on its own page.

not rated 10repo changed 1mo ago A scan tokens not measured original MIT
View source ↗ slowww-ai/second-brain
Reuse

Borrowing it

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

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/slowww-ai/second-brain/post-tool-use"><img src="https://agentmods.dev/badge/hooks/slowww-ai/second-brain/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 · 14 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "f=$(if command -v jq >/dev/null 2>&1; then jq -r '.tool_input.file_path // empty'; else .venv/bin/python -c 'import sys,json;print(json.load(sys.stdin).get(\"tool_input\",{}).get(\"file_path\",\"\"))' 2>/dev/null; fi); case \"$f\" in *wiki/notes/*) cd \"${CLAUDE_PROJECT_DIR:-.}\" && { .venv/bin/python scripts/reindex.py >/dev/null 2>&1 || echo '{\"systemMessage\":\"⚠ reindex.py failed — semantic index is stale. Run: .venv/bin/python scripts/reindex.py\"}'; };; esac",
          "statusMessage": "Reindexing notes..."
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 3. 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 · +1 lines ba409110e79a
  2. 2mo ago First seen · 13 lines scan A e10e78de1b62

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository slowww-ai/second-brain (10 stars, last pushed 1mo 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.

Memory and context
Related

PostToolUse compared with hooks from other repositories

PostToolUse next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
PostToolUseslowww-ai/second-brainHook101mo agoMITA—Claude Code
SessionStartMetcalfSolutions/SatoriHook1164d agoApache-2.0A—Claude Code
SessionStartnhevers/MoltBrainHook2537mo agononeA—Claude Code
PostToolUsesupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartsupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109kyesterdayApache-2.0A—Claude Code
PreToolUseapache/supersetHook75kyesterdayApache-2.0A—Claude Code