agentmods.dev

PostToolUseFailure

PostToolUseFailure is a hook for coding agents from Alan-512/ExperienceEngine. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A hook that runs a shell script after an agent tool call fails. A hook is an automatic action tied to a specific event.

In plain words
What is it for?
It runs `claude-hook.sh` after any matched tool failure.
Why use it?
It creates a consistent response point for tool failures instead of leaving every failure to be handled manually.

Hook

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the experienceengine plugin — 4 skills, 6 hooks, 1 MCP server shipped together

One of 6 entries in hooks.json — they are configured in one file and arrive together.

not rated 2 1mo ago A scan tokens not measured copy · 59% MIT
View the source file Alan-512/ExperienceEngine
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Alan-512/ExperienceEngine
Claude Code
/plugin install experienceengine

Or install experienceengine, the plugin that ships this one along with the rest of its 4 skills, 6 hooks, 1 MCP server.

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 PostToolUseFailure

README.md
[![agentmods](https://agentmods.dev/badge/hooks/alan-512/experienceengine/post-tool-use-failure.svg)](https://agentmods.dev/hooks/alan-512/experienceengine/post-tool-use-failure)
Your own site
<a href="https://agentmods.dev/hooks/alan-512/experienceengine/post-tool-use-failure"><img src="https://agentmods.dev/badge/hooks/alan-512/experienceengine/post-tool-use-failure.svg" alt="Measured on agentmods" 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. Scan, not verified.
Origin 59% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

PostToolUseFailure 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 3d 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

59% identical to SessionStart — 9 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.

hooks/hooks.json · 14 lines

What it actually says

{
  "PostToolUseFailure": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/scripts/claude-plugin/claude-hook.sh",
          "timeout": 30
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 6. 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. 3d ago First seen · 14 lines scan A b0a027617ca4

Subscribe to this mod's changes

PostToolUseFailure is a hook published in the GitHub repository Alan-512/ExperienceEngine (2 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. It is 59% identical to SessionStart, differing in 9 lines, and is treated as a copy.

agent-memoryclaude-codecodexcoding-agentmcpopenclaw
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, running signet hook session-start -H codex --codex-json. From Signet-AI/signetai.

Signet-AI/signetai · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, running signet hook user-prompt-submit -H codex --codex-json. From Signet-AI/signetai.

Signet-AI/signetai · not measured

Stop

Runs when the agent finishes a response, running signet hook session-end -H codex. From Signet-AI/signetai.

Signet-AI/signetai · not measured

PreToolUse

Runs before the agent uses a tool for Read, Edit, Write, Glob, Grep, Bash, MultiEdit, Patch, ApplyPatch, Search, ListDir, Task, Agent, Skill, NotebookEdit, ScheduleWakeup, PowerShell, pwsh, Pwsh, cmd, Cmd, wsl, Wsl, Monitor and mcp__.* tool calls, running python -m aidocs_mcp.claude_hook. From cristian1991/AIDOCS.

cristian1991/AIDOCS · not measured

SessionStart

Runs when a session starts, running python -m aidocs_mcp.claude_hook. From cristian1991/AIDOCS.

cristian1991/AIDOCS · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, running python -m aidocs_mcp.claude_hook. From cristian1991/AIDOCS.

cristian1991/AIDOCS · not measured