agentmods.dev

add-hook

add-hook is a command for Claude Code from ShipWithAI/shipwithai-plugins. It costs 56 tokens per session (408 once invoked), scanned A, original, MIT.

A command that adds one automated hook to Claude Code's .claude/settings.json file. A hook runs a command when a specified tool event occurs.

In plain words
What is it for?
Use it to add a pre-tool, post-tool, or stop hook triggered by tools such as Edit, Write, or Bash, optionally for matching file patterns.
Why use it?
It makes repeated actions, such as formatting or testing after edits, happen automatically without changing existing permissions.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md.

Part of the shipwithai-starter plugin — 13 skills, 4 commands, 1 agent shipped together

not rated 9repo 2mo ago A scan 56 tokens original MIT

Good fit Use it to add a pre-tool, post-tool, or stop hook triggered by tools such as Edit, Write, or Bash, optionally for matching file patterns.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/shipwithai/shipwithai-plugins/add-hook
View source ↗ ShipWithAI/shipwithai-plugins shipwithai.io
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.

Clone the repo
git clone --depth 1 https://github.com/ShipWithAI/shipwithai-plugins

Made for: Claude Code.

Or install shipwithai-starter, the plugin that ships this one along with the rest of its 13 skills, 4 commands, 1 agent.

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 add-hook

README.md
[![agentmods](https://agentmods.dev/badge/commands/shipwithai/shipwithai-plugins/add-hook/github.svg)](https://agentmods.dev/commands/shipwithai/shipwithai-plugins/add-hook)
Your own site
<a href="https://agentmods.dev/commands/shipwithai/shipwithai-plugins/add-hook"><img src="https://agentmods.dev/badge/commands/shipwithai/shipwithai-plugins/add-hook/github.svg" alt="Measured on agentmods" height="20"></a>

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 add-hook

Your own site · 80×15
<a href="https://agentmods.dev/commands/shipwithai/shipwithai-plugins/add-hook"><img src="https://agentmods.dev/badge/commands/shipwithai/shipwithai-plugins/add-hook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 408 The whole file, excluding the scripts and references it only reads on demand.
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.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00056 $0.00408
Opus 5.5 $0.00022 $0.00163
Sonnet 5.5 $0.00011 $0.00082
Haiku 4.5 $0.00006 $0.00041

Measured 2mo ago against content hash b344f8d6c8ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

add-hook 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 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

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.

plugins/starter/commands/add-hook.md · 48 lines

What it actually says

/add-hook

Add a single hook to the .claude/settings.json hooks section. Stateless.

Steps

  1. Check the plugin's hooks-catalog.json (located at skills/setup-hooks/hooks-catalog.json in the plugin directory) for a matching common pattern.

    • Match found: show preset, confirm or customize.
    • No match: ask:
      • Hook type: PreToolUse / PostToolUse / Stop?
      • Trigger on which tool: Edit / Write / Bash / * (all)?
      • File pattern (optional): *.ts, *.py, *.go?
      • Command to run?

  2. Show preview before confirming:

    This hook will run `[command]` every time Claude uses the [tool] tool
[on files matching [pattern]].

Preview:
{
  "PostToolUse": [{
    "matcher": "Edit",
    "hooks": [{"type": "command", "command": "[command]"}]
  }]
}

  3. Check for duplicate: if an identical hook already exists in settings.json, skip.

  4. If .claude/settings.json does not exist: create it with { "hooks": {} }.

  5. Confirm → merge into .claude/settings.json hooks section. Do not overwrite the permissions section.

  6. Update **Last updated:** date in the Harness config section of CLAUDE.md if the file exists.

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. 2mo ago First seen · 48 lines · 56 tokens per session scan A b344f8d6c8ae

Subscribe to this mod's changes

add-hook is a command published in the GitHub repository ShipWithAI/shipwithai-plugins (9 stars, last pushed 2mo ago), licensed MIT. It adds 56 tokens to every session and 408 once invoked, about $0.0002 per session on Opus 5.5. 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.

Claude Codeai-codingclaude-code-plugindeveloper-toolsshipwithai
Related

add-hook compared with commands from other repositories

add-hook next to 6 commands from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
add-hookShipWithAI/shipwithai-pluginsCommand92mo agoMITA56Claude Code
debugprimeline-ai/evolving-liteCommand501mo agoMITA8Claude Code
ccc-orchestrateKevinZai/commanderCommand6todayMITA53Claude Code
ccc-themeKevinZai/commanderCommand6todayMITA47Claude Code
ccc-auditKevinZai/commanderCommand6todayMITA45Claude Code
specmanager-buildjoanseg/specmanagerCommand276d agoMITB25Claude Code
executeskullninja/coco-workflowCommand726d agoMITA28Claude Code