Hook Development SKILL.md skillA
Hook Development from tzachbon/smart-ralph is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tzachbon/smart-ralph/Hook Development@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tzachbon/smart-ralph
- Path
.agents/skills/Hook Development/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Jan 22, 2026
- Size
- 16,246 bytes
- Repository stars
- 567
- License
- MIT
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Hook Development for Claude Code Plugins
## Overview
Hooks are event-driven automation scripts that execute in response to Claude Code events. Use hooks to validate operations, enforce policies, add context, and integrate external tools into workflows.
**Key capabilities:**
- Validate tool calls before execution (PreToolUse)
- React to tool results (PostToolUse)
- Enforce completion standards (Stop, SubagentStop)
- Load project context (SessionStart)
- Automate workflows across the development lifecycle
## Hook Types
### Prompt-Based Hooks (Recommended)
Use LLM-driven decision making for context-aware validation:
```json
{
"type": "prompt",
"prompt": "Evaluate if this tool use is appropriate: $TOOL_INPUT",
"timeout": 30
}
```
**Supported events:** Stop, SubagentStop, UserPromptSubmit, PreToolUse
**Benefits:**
- Context-aware decisions based on natural language reasoning
- Flexible evaluation logic without bash scripting
- Better edge case handling
- Easier to maintain and extend
### Command Hooks
Execute bash commands for deterministic checks:
```json
{
"type": "command",
"command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/validate.sh",
"timeout": 60
}
```
…Read the whole file at its exact version.
How to install
mdr add tzachbon/smart-ralph/Hook Development@sha256:d14528f389cae485The line at the top of this page pins the label v0.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lfod3afdf3bkknhc)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jan 22, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16246 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
tzachbon/smart-ralph · 567 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lfod3afdf3bkknhc GET https://markdownregistry.com/api/v1/resolve?ref=tzachbon/smart-ralph/Hook Development GET https://markdownregistry.com/api/v1/blob/d14528f389cae485ac50583a22be326485c83fc9c8ef7ce700213e1583cf8fbe
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.