singularity-forge/gitbook/features/skills.md
ace-pm b29c12d5e5 refactor(native): rename gsd_parser.rs to forge_parser.rs
Final rebrand: rename remaining Rust source file to complete the gsd → forge
transition. All parser references already use forge_parser after earlier commits.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-15 14:58:21 +02:00

3.3 KiB

Skills

Skills are specialized instruction sets that SF loads when the task matches. They provide domain-specific guidance — coding patterns, framework idioms, testing strategies, and tool usage.

Skills follow the open Agent Skills standard and work across multiple AI agents, not just SF.

Skill Directories

Location Scope Description
~/.agents/skills/ Global Shared across all projects
.agents/skills/ (project root) Project Project-specific, committable to git

Global skills take precedence when names collide.

Installing Skills

Skills are installed via the skills.sh CLI:

# Interactive — choose skills and target agents
npx skills add dpearson2699/swift-ios-skills

# Install specific skills
npx skills add dpearson2699/swift-ios-skills --skill swift-concurrency --skill swiftui-patterns -y

# Install all from a repo
npx skills add dpearson2699/swift-ios-skills --all

# Check for updates
npx skills check

# Update installed skills
npx skills update

Onboarding Catalog

During sf init, SF detects your project's tech stack and recommends relevant skill packs:

  • Swift — SwiftUI, Swift Core, concurrency, Charts, Testing
  • iOS — App Intents, Widgets, StoreKit, MapKit, Core ML, Vision, accessibility
  • Web — React, React Native, frontend design, accessibility
  • Languages — Rust, Python, Go patterns and best practices
  • General — Document handling (PDF, DOCX, XLSX)

Skill Discovery

The skill_discovery preference controls how SF finds skills during auto mode:

Mode Behavior
auto Skills found and applied automatically
suggest Skills identified but require confirmation (default)
off No skill discovery

Skill Preferences

Control which skills are used:

always_use_skills:
  - debug-like-expert
prefer_skills:
  - frontend-design
avoid_skills:
  - security-docker
skill_rules:
  - when: task involves authentication
    use: [clerk]
  - when: frontend styling work
    prefer: [frontend-design]

Creating Custom Skills

Create your own skill by adding a directory with a SKILL.md file:

~/.agents/skills/my-skill/
  SKILL.md           — instructions for the AI
  references/        — optional reference files

The SKILL.md contains instructions the AI follows when the skill is active.

Project-Local Skills

Place skills in your project root for project-specific guidance:

.agents/skills/my-project-skill/
  SKILL.md

Project-local skills can be committed to git so team members share the same skill set.

Skill Health Dashboard

Track skill performance:

/sf skill-health              # overview table
/sf skill-health rust-core    # detailed view for one skill
/sf skill-health --stale 30   # skills unused for 30+ days
/sf skill-health --declining  # skills with falling success rates

The dashboard flags:

  • Success rate below 70% over the last 10 uses
  • Token usage rising 20%+ compared to previous window
  • Skills unused beyond the configured threshold

Staleness Detection

skill_staleness_days: 60   # flag skills unused for 60+ days (0 to disable)

Stale skills are excluded from automatic matching but remain available for explicit use.