AG Kit is a toolkit that gives Google Antigravity coding agents a structured workspace with rules, skills, specialist agents, workflows, persistent memory, orchestration, MCP guidance, and a safety hook. It is for building and operating agent workflows in Antigravity, and its catalogue entries provide parts of that workspace contract.
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/vudovn/ag-kit/architecturenpx skills add vudovn/ag-kit --skill architecturegit clone --depth 1 https://github.com/vudovn/ag-kitWrote 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/vudovn/ag-kit/architecture)<a href="https://agentmods.dev/skills/vudovn/ag-kit/architecture"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/architecture.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00028 | $0.00399 |
| Opus 5 | $0.00014 | $0.00199 |
| Sonnet 5 | $0.00006 | $0.00080 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
architecture 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 5d 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.
Copies of this mod
8 near-identical copies found in the catalogue:
- architecture — 86% identical, 9 lines differ
- architecture — 84% identical, 3 lines differ
- architecture — 84% identical, 2 lines differ
- architecture — 84% identical, 2 lines differ
- architecture — 84% identical, 2 lines differ
- architecture — 84% identical, 2 lines differ
- architecture — 84% identical, 2 lines differ
- architecture — 84% identical, 2 lines differ
What it actually says
Architecture Decision Framework
"Requirements drive architecture. Trade-offs inform decisions. ADRs capture rationale."
🎯 Selective Reading Rule
Read ONLY files relevant to the request! Check the content map, find what you need.
| File | Description | When to Read |
|---|---|---|
context-discovery.md |
Questions to ask, project classification | Starting architecture design |
trade-off-analysis.md |
ADR templates, trade-off framework | Documenting decisions |
pattern-selection.md |
Decision trees, anti-patterns | Choosing patterns |
examples.md |
MVP, SaaS, Enterprise examples | Reference implementations |
patterns-reference.md |
Quick lookup for patterns | Pattern comparison |
🔗 Related Skills
| Skill | Use For |
|---|---|
@[skills/database-design] |
Database schema design |
@[skills/api-patterns] |
API design patterns |
@[skills/deployment-procedures] |
Deployment architecture |
Core Principle
"Simplicity is the ultimate sophistication."
- Start simple
- Add complexity ONLY when proven necessary
- You can always add patterns later
- Removing complexity is MUCH harder than adding it
Validation Checklist
Before finalizing architecture:
- Requirements clearly understood
- Constraints identified
- Each decision has trade-off analysis
- Simpler alternatives considered
- ADRs written for significant decisions
- Team expertise matches chosen patterns
What ships with it
5 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.
- 5d ago First seen · 58 lines · 28 tokens per session scan A e07339f434ca
architecture is a skill published in the GitHub repository vudovn/ag-kit (8,168 stars, last pushed 5d ago), licensed MIT. It adds 28 tokens to every session and 399 once invoked, about $0.0001 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.
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