agentmods.dev

PostToolUse

A set of automatic actions that run after the coding agent finishes using tools such as Bash, Grep, Glob, or Read. These actions run scripts for token monitoring, output filtering, caching, progress tracking, and related tasks.

In plain words
What is it for?
It can monitor token use, filter test and command output, save tool results for reuse, track progress, and run automatic backpropagation after selected tool calls.
Why use it?
It handles recurring follow-up work after tool calls, so the agent does not need to perform each check or update manually.

Hook

55 1mo ago A scan tokens not measured copy · 59% MIT
View the source file LucasDuys/forge
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/lucasduys/forge/post-tool-use
Clone the repo
git clone --depth 1 https://github.com/LucasDuys/forge
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

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

59% identical to SessionStart — 57 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 · 62 lines

What it actually says

{
  "PostToolUse": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/token-monitor.sh",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/test-output-filter.js",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/output-filter.js",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/auto-backprop.js",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash|Grep|Glob|Read",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/tool-cache-store.js",
          "timeout": 5
        }
      ]
    },
    {
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/progress-tracker.js",
          "timeout": 5
        }
      ]
    }
  ]
}
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. 2d ago First seen · 62 lines scan A dda1dc9c6d0d

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository LucasDuys/forge (55 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 57 lines, and is treated as a copy.

agentic-aiai-agentai-coding-agentai-toolsanthropicautomation
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Bash, Edit, Write and Read tool calls, executing damage-control.js via node. From mattmre/EVOKORE-MCP-PUBLIC.

mattmre/EVOKORE-MCP-PUBLIC · not measured

PreToolUse

Runs before the agent uses a tool for Edit, Write, MultiEdit, NotebookEdit, Bash and PowerShell tool calls, executing guard_risk_config.py via python (2 commands). From TerminatrX/agenticTrader.

TerminatrX/agenticTrader · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, running date >> last_prompting_history.log. From sysnet4admin/_Book_Claude-Code.

sysnet4admin/_Book_Claude-Code · not measured

PreToolUse

Runs before the agent uses a tool for Edit and Write tool calls, running an inline shell check. From adaline/skills.

adaline/skills · not measured

PreCompact

Runs before the context is compacted, executing pre-compact.js via node. From mattmre/EVOKORE-MCP-PUBLIC.

mattmre/EVOKORE-MCP-PUBLIC · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured