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# skill-rules.json - Complete Reference
Complete schema and configuration reference for `.claude/skills/skill-rules.json`.
## Table of Contents
- [File Location](#file-location)
- [Complete TypeScript Schema](#complete-typescript-schema)
- [Field Guide](#field-guide)
- [Example: Guardrail Skill](#example-guardrail-skill)
- [Example: Domain Skill](#example-domain-skill)
- [Validation](#validation)
---
## File Location
**Path:** `.claude/skills/skill-rules.json`
This JSON file defines all skills and their trigger conditions for the auto-activation system.
---
## Complete TypeScript Schema
```typescript
interface SkillRules {
version: string;
skills: Record<string, SkillRule>;
}
interface SkillRule {
type: 'guardrail' | 'domain';
enforcement: 'block' | 'suggest' | 'warn';
priority: 'critical' | 'high' | 'medium' | 'low';
promptTriggers?: {
keywords?: string[];
intentPatterns?: string[]; // Regex strings
};
fileTriggers?: {
pathPatterns: string[]; // Glob patterns
pathExclusions?: string[]; // Glob patterns
contentPatterns?: string[]; // Regex strings
createOnly?: boolean; // Only trigger on file creation
};
blockMessage?: string; // For guardrails, {file_path} placeholder
skipConditions?: {
sessionSkillUsed?: boolean; // Skip if used in session
fileMarkers?: string[]; // e.g., ["@skip-validation"]
envOverride?: string; // e.g., "SKIP_DB_VERIFICATION"
};
}
```
---
## Field Guide
### Top Level
| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `version` | string | Yes | Schema version (currently "1.0") |
| `skills` | object | Yes | Map of skill name → SkillRule |
### SkillRule Fields
| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `type` | string | Yes | "guardrail" (enforced) or "domain" (advisory) |
| `enforcement` | string | Yes | "block" (PreToolUse), "suggest" (UserPromptSubmit), or "warn" |
| `priority` | string | Yes | "critical", "high", "medium", or "low" |
| `promptTriggers` | object | Optional | Triggers for UserPromptSubmit hook |
| `fileTriggers` | object | Optional | Triggers for PreToolUse hook |
| `blockMessage` | string | Optional* | Required if enforcement="block". Use `{file_path}` placeholder |
| `skipConditions` | object | Optional | Escape hatches and session tracking |
*Required for guardrails
### promptTriggers Fields
| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `keywords` | string[] | Optional | Exact substring matches (case-insensitive) |
| `intentPatterns` | string[] | Optional | Regex patterns for intent detection |
### fileTriggers Fields
| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `pathPatterns` | string[] | Yes* | Glob patterns for file paths |
| `pathExclusions` | string[] | Optional | Glob patterns to exclude (e.g., test files) |
| `contentPatterns` | string[] | Optional | Regex patterns to match file content |
| `createOnly` | boolean | Optional | Only trigger when creating new files |
*Required if fileTriggers is present
### skipConditions Fields
| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `sessionSkillUsed` | boolean | Optional | Skip if skill already used this session |
| `fileMarkers` | string[] | Optional | Skip if file contains comment marker |
| `envOverride` | string | Optional | Environment variable name to disable skill |
---
## Example: Guardrail Skill
Complete example of a blocking guardrail skill with all features:
```json
{
"database-verification": {
"type": "guardrail",
"enforcement": "block",
"priority": "critical",
"promptTriggers": {
"keywords": [
"prisma",
"database",
"table",
"column",
"schema",
"query",
"migration"
],
"intentPatterns": [
"(add|create|implement).*?(user|login|auth|tracking|feature)",
"(modify|update|change).*?(table|column|schema|field)",
"database.*?(change|update|modify|migration)"
]
},
"fileTriggers": {
"pathPatterns": [
"**/schema.prisma",
"**/migrations/**/*.sql",
"database/src/**/*.ts",
"form/src/**/*.ts",
"email/src/**/*.ts",
"users/src/**/*.ts",
"projects/src/**/*.ts",
"utilities/src/**/*.ts"
],
"pathExclusions": [
"**/*.test.ts",
"**/*.spec.ts"
],
"contentPatterns": [
"import.*[Pp]risma",
"PrismaService",
"prisma\\.",
"\\.findMany\\(",
"\\.findUnique\\(",
"\\.findFirst\\(",
"\\.create\\(",
"\\.createMany\\(",
"\\.update\\(",
"\\.updateMany\\(",
"\\.upsert\\(",
"\\.delete\\(",
"\\.deleteMany\\("
]
},
"blockMessage": "⚠️ BLOCKED - Database Operation Detected\n\n📋 REQUIRED ACTION:\n1. Use Skill tool: 'database-verification'\n2. Verify ALL table and column names against schema\n3. Check database structure with DESCRIBE commands\n4. Then retry this edit\n\nReason: Prevent column name errors in Prisma queries\nFile: {file_path}\n\n💡 TIP: Add '// @skip-validation' comment to skip future checks",
"skipConditions": {
"sessionSkillUsed": true,
"fileMarkers": [
"@skip-validation"
],
"envOverride": "SKIP_DB_VERIFICATION"
}
}
}
```
### Key Points for Guardrails
1. **type**: Must be "guardrail"
2. **enforcement**: Must be "block"
3. **priority**: Usually "critical" or "high"
4. **blockMessage**: Required, clear actionable steps
5. **skipConditions**: Session tracking prevents repeated nagging
6. **fileTriggers**: Usually has both path and content patterns
7. **contentPatterns**: Catch actual usage of technology
---
## Example: Domain Skill
Complete example of a suggestion-based domain skill:
```json
{
"project-catalog-developer": {
"type": "domain",
"enforcement": "suggest",
"priority": "high",
"promptTriggers": {
"keywords": [
"layout",
"layout system",
"grid",
"grid layout",
"toolbar",
"column",
"cell editor",
"cell renderer",
"submission",
"submissions",
"blog dashboard",
"datagrid",
"data grid",
"CustomToolbar",
"GridLayoutDialog",
"useGridLayout",
"auto-save",
"column order",
"column width",
"filter",
"sort"
],
"intentPatterns": [
"(how does|how do|explain|what is|describe).*?(layout|grid|toolbar|column|submission|catalog)",
"(add|create|modify|change).*?(toolbar|column|cell|editor|renderer)",
"blog dashboard.*?"
]
},
"fileTriggers": {
"pathPatterns": [
"frontend/src/features/submissions/**/*.tsx",
"frontend/src/features/submissions/**/*.ts"
],
"pathExclusions": [
"**/*.test.tsx",
"**/*.test.ts"
]
}
}
}
```
### Key Points for Domain Skills
1. **type**: Must be "domain"
2. **enforcement**: Usually "suggest"
3. **priority**: "high" or "medium"
4. **blockMessage**: Not needed (doesn't block)
5. **skipConditions**: Optional (less critical)
6. **promptTriggers**: Usually has extensive keywords
7. **fileTriggers**: May have only path patterns (content less important)
---
## Validation
### Check JSON Syntax
```bash
cat .claude/skills/skill-rules.json | jq .
```
If valid, jq will pretty-print the JSON. If invalid, it will show the error.
### Common JSON Errors
**Trailing comma:**
```json
{
"keywords": ["one", "two",] // ❌ Trailing comma
}
```
**Missing quotes:**
```json
{
type: "guardrail" // ❌ Missing quotes on key
}
```
**Single quotes (invalid JSON):**
```json
{
'type': 'guardrail' // ❌ Must use double quotes
}
```
### Validation Checklist
- [ ] JSON syntax valid (use `jq`)
- [ ] All skill names match SKILL.md filenames
- [ ] Guardrails have `blockMessage`
- [ ] Block messages use `{file_path}` placeholder
- [ ] Intent patterns are valid regex (test on regex101.com)
- [ ] File path patterns use correct glob syntax
- [ ] Content patterns escape special characters
- [ ] Priority matches enforcement level
- [ ] No duplicate skill names
---
**Related Files:**
- [SKILL.md](SKILL.md) - Main skill guide
- [TRIGGER_TYPES.md](TRIGGER_TYPES.md) - Complete trigger documentation
- [TROUBLESHOOTING.md](TROUBLESHOOTING.md) - Debugging configuration issues