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 skills add VidyFoo/antigravity-skill-engine --skill skills-managinggit clone --depth 1 https://github.com/VidyFoo/antigravity-skill-engineWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vidyfoo/antigravity-skill-engine/skills-managing)<a href="https://agentmods.dev/skills/vidyfoo/antigravity-skill-engine/skills-managing"><img src="https://agentmods.dev/badge/skills/vidyfoo/antigravity-skill-engine/skills-managing.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Rogue Agent · line 109 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- medium Rogue Agent · line 147 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
What 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 5.1 | $0.00036 | $0.01584 |
| Opus 5 | $0.00018 | $0.00792 |
| Sonnet 5 | $0.00007 | $0.00317 |
| Haiku 4.5 | $0.00004 | $0.00158 |
Grade A, and why
skills-managing 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 7d ago.
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 — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ASE Skill Management Guide (V3.1)
Purpose
Comprehensive guide for creating and managing skills in the Antigravity Skill Engine (ASE), following the Registry V3.1 architecture with domain-based organization and semantic matching.
When to Use This Skill
- Creating or adding new skills
- Importing skills from external sources
- Understanding registry structure and routing
- Debugging skill activation issues
- Maintaining skill documentation
System Architecture (V3.1)
Directory Structure
Skills are organized by domain categories:
.agent/skills/
├── registry.json # V3.1 索引 (唯一真理来源)
│
├── 1-dev/ # 开发域
│ └── {skill-name}/SKILL.md
├── 2-audit/ # 审计域
│ └── {skill-name}/SKILL.md
├── 3-sys/ # 系统域
│ └── {skill-name}/SKILL.md
├── 4-tools/ # 工具域
│ └── {skill-name}/SKILL.md
└── external/ # 外部依赖
└── {skill-name}/SKILL.md
Skill Folder Structure
{skill-name}/
├── SKILL.md (required) # Main skill content
├── resources/ # Templates, guides, assets
└── scripts/ # Optional executable tooling
Registry V3.1 Schema
{
"version": "3.1.0",
"categories": {
"1-dev": "DEV (开发域)",
"2-audit": "AUDIT (审计域)",
"3-sys": "SYS (系统域)",
"4-tools": "TOOLS (工具域)",
"external": "EXTERNAL (外部依赖)"
},
"skills": {
"X.Y": {
"id": "skill-name",
"name": "X.Y Display Name",
"category": "category-id",
"description": "Copied from SKILL.md frontmatter",
"skill_path": ".agent/skills/{category}/{skill-name}/SKILL.md"
}
}
}
关键变更 (V3.1): 移除了
intent_keywords，仅使用description进行语义匹配。
Mode Selection
| Mode | Trigger | Description |
|---|---|---|
| CREATE | create, new, add | Create a new skill from scratch |
| INGEST | import, clone, ingest | Import an existing skill from git |
| HARVEST | harvest, archive, save resource | Archive a reusable resource to a skill |
What ships with it
10 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.
- references/ADVANCED.md 2.4 KB
- references/HOOK_MECHANISMS.md 2.6 KB
- references/PATTERNS_LIBRARY.md 3.0 KB
- references/SKILL_RULES_REFERENCE.md 3.0 KB
- references/TRIGGER_TYPES.md 3.9 KB
- references/TROUBLESHOOTING.md 2.9 KB
- resources/ingestion-protocol.md 2.0 KB
- resources/mcp-integration-guide.md 1.6 KB
- resources/skill-review.md 1.7 KB
- scripts/safe_replace.py 1.3 KB runs code
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.
- 7d ago First seen · 224 lines · 36 tokens per session scan A 924617e1f6a4
skills-managing is a skill published in the GitHub repository VidyFoo/antigravity-skill-engine (12 stars, last pushed 3d ago), licensed MIT. It adds 36 tokens to every session and 1,584 once invoked, about $0.0002 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 2026-08-30.
Other skills, from other repositories
Skill Development
This skill should be used when the user wants to "create a skill", "add a skill to plugin", "write a new skill", "improve skill description", "organize skill content", or needs guidance on skill structure, progressive disclosure, or skill development best practices for Claude Code plugins.
SRT Card Annotator
This skill should be used when the user asks to "add reference cards to srt", "annotate srt with cards", "insert cards into subtitles", "generate srt with card annotations", "add 字卡 to srt", or needs to add contextual reference cards below subtitle text blocks in SRT files.
SRT Enhancer
A skill for improving SRT subtitle files, which store timed captions, by comparing them with an original script or source text.
SRT Social Summary
A writing tool that turns SRT subtitle files—text with timing information—into summaries and platform-specific social media descriptions.
Audio to SRT Converter
This skill should be used when the user asks to "convert audio to srt", "generate subtitles from audio", "create srt from mp3/wav/m4a/flac", "transcribe audio to subtitles", or needs to generate SRT subtitle files from audio files (MP3, WAV, M4A, FLAC, etc.) with customizable character limits and timeline adjustments.
template-selector
Recommend the right skill bundle, agent, and workflow sequence for a new project — so media professionals can start producing instead of browsing a 394-skill library.