# Case Study: Hook-Backed Skill Synthesis

## Scenario

Goal: create a skill that enforces a deterministic check at a specific lifecycle or tool boundary.

## Input collection approach

This case collected:

1. official hook lifecycle and schema docs
2. security guidance for shell-executed hooks
3. examples of narrow matchers vs over-broad hooks
4. fallback behavior for environments without hooks

## Coverage matrix used

Required dimensions tracked during synthesis:

1. event and matcher scope
2. decision behavior
3. security boundaries
4. fallback behavior
5. portability constraints

## Synthesized artifacts produced

The resulting skill references included:

1. hook configuration example
2. safety checklist
3. fallback path without hooks
4. anti-pattern showing over-broad or unsafe hook scope

## What made this high quality

1. the hook scope was narrow and auditable
2. security assumptions were explicit
3. the skill still described what to do when hooks were unavailable