A hook that runs a security-audit command whenever a task is created. A hook is an automatic action tied to a particular event.

Use it to run skarn guard in audit mode for every TaskCreated event. The input does not describe any other job or behavior.

It places a security check at task creation, so audit results can be produced before work on the task proceeds.

TaskCreated — Hook by skarn-security

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/skarn-security/agent-guard/task-created

Clone the repo

git clone --depth 1 https://github.com/skarn-security/agent-guard

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 original No closer match found in the catalogue.

Security

Grade A, and why

TaskCreated 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

Copies of this mod

1 near-identical copy found in the catalogue:

Stop — 92% identical, 4 lines differ

claude/hooks/hooks.json · 13 lines

What it actually says

{
  "TaskCreated": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "skarn guard --guard-mode audit",
          "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.

2d ago First seen · 13 lines scan A a99ff3a055a8

Subscribe to this mod's changes

TaskCreated is a hook published in the GitHub repository skarn-security/agent-guard (31 stars, last pushed 5d 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 2026-08-30.

Planning Security gemini-cli-extension

BeforeTool

Runs on the BeforeTool event for tool == "run_shell_command", tool == "run_shell_command", tool == "run_shell_command" && tool_input.command matches "^\\s*(npm (install, test, i, ci), pnpm (install, test, i), yarn (install, test, add, remove, upgrade), bun (install, test, i, add, remove), cargo build, make, docker…

Jamkris/everything-gemini-code · not measured

TaskCreated

Getting it into your agent

Grade A, and why

Nothing flagged

Copies of this mod

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

BeforeTool

SessionStart

PreCompact

SessionEnd

BeforeAgent

SessionStart