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.
npx agentmods add skills/launch52-ai/flutter-template/skill-createnpx skills add launch52-ai/flutter-template --skill skill-creategit clone --depth 1 https://github.com/launch52-ai/flutter-templateWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00056 | $0.01855 |
| Opus 5 | $0.00028 | $0.00928 |
| Sonnet 5 | $0.00011 | $0.00371 |
| Haiku 4.5 | $0.00006 | $0.00186 |
Grade A, and why
skill-create 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 238 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Creation & Validation
Create complete, well-structured Claude Code skills. Generates scaffolds, validates skill completeness, and ensures quality standards.
When to Use This Skill
- Creating a new skill from scratch
- Auditing existing skills for completeness
- Validating a skill before deployment
- Understanding skill best practices
- User asks "create skill", "new skill", or "validate skill"
Questions to Ask
- Skill category: Code-heavy, Auth, Config, Knowledge, or Orchestration?
- Core purpose: What problem does this skill solve? (1-2 sentences)
- Trigger words: What keywords should invoke this skill?
- Reference code: Will it include Dart templates, or just guides?
- Validation needs: What should the check script verify?
Quick Reference
Skill Categories
| Category | Examples | Focus |
|---|---|---|
| Code-Heavy | domain, data, presentation | Generate detailed code from specs |
| Auth | auth, phone-auth, social-login | Authentication with platform setup |
| Config | release, ci-cd, analytics | Platform configs and workflows |
| Knowledge | design, i18n, testing, a11y | Guidelines and patterns |
| Orchestration | plan, init, feature-init | Coordinate other skills |
Directory Structure
.claude/skills/{skill-name}/
├── SKILL.md # Main entry (<300 lines)
├── {topic}-guide.md # Detailed guides (reference/ for code)
├── templates/ # Platform configs (XML, YAML)
└── scripts/check.dart # Validation script
SKILL.md Requirements
| Section | Required | Purpose |
|---|---|---|
| YAML frontmatter | YES | name, description, allowed-tools |
| When to Use | YES | Clear trigger scenarios |
| Workflow | YES | Numbered implementation steps |
| Guides table | YES | Links to detailed content |
| Checklist | YES | Verification items |
| Related Skills | YES | Cross-references |
| Quick Reference | Recommended | Decision tables, key patterns |
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday First seen · 238 lines · 56 tokens per session scan A 5d27c4fff473
skill-create is a skill published in the GitHub repository launch52-ai/flutter-template (2 stars, last pushed 6mo ago), licensed MIT. It adds 56 tokens to every session and 1,855 once invoked, about $0.0003 per session on Opus 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.
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