A set of automatic actions that run after the coding agent edits files or runs shell commands. The actions validate changed content and route quality-assurance test runners.

Use it to run content validation after edits and to route QA test runners after Bash commands.

Checks can happen immediately after changes or commands finish, reducing the chance that validation is forgotten during development.

PostToolUse — Hook by sumithr

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/sumithr/sumo-qa/post-tool-use

Clone the repo

git clone --depth 1 https://github.com/sumithr/sumo-qa

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 53% copy Near-identical to another mod 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 2d 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.

Origin

This is a copy

53% identical to SessionStart — 17 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/settings.json · 22 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Edit|Write|MultiEdit",
      "hooks": [
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/validate-on-content-edit.py"
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/route-qa-runners-prefilter.cmd"
        }
      ]
    }
  ]
}

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.

2d ago First seen · 22 lines scan A 3f0a18c805f5

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository sumithr/sumo-qa (6 stars, last pushed 9d ago), licensed Apache-2.0. 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. It is 53% identical to SessionStart, differing in 17 lines, and is treated as a copy.

ai-agents claude-code istqb mcp mcp-server

PostToolUse

Getting it into your agent

Grade A, and why

Nothing flagged

This is a copy

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

PostToolUse

SessionStart

SessionStart

PreToolUse

PreToolUse

SessionStart