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 navendubrajesh/context-management-for-agents --skill antigravity-context-architecturegit clone --depth 1 https://github.com/navendubrajesh/context-management-for-agentsWrote 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/navendubrajesh/context-management-for-agents/antigravity-context-architecture)<a href="https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-context-architecture"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-context-architecture/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-context-architecture"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-context-architecture.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00102 | $0.00972 |
| Opus 5 | $0.00051 | $0.00486 |
| Sonnet 5 | $0.00020 | $0.00194 |
| Haiku 4.5 | $0.00010 | $0.00097 |
Grade A, and why
antigravity-context-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 12d 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 — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Antigravity Context Architecture
Google Antigravity is an agent-first development platform with two surfaces: an Editor (synchronous, hands-on) and a Manager (asynchronous multi-agent orchestration). Context is not just chat history — it combines AGENTS.md, Skills, Knowledge Items (KIs), Artifacts, and workflows into persistent, reviewable state.
When to Activate
Activate this skill when:
- Designing how Antigravity retains knowledge across conversations
- Understanding Artifacts vs Knowledge Items vs conversation history
- Orchestrating multiple agents via Manager Surface
- Deciding what belongs in AGENTS.md vs
.agents/skills/vs Knowledge Items - Diagnosing why Antigravity repeats work or ignores prior decisions
Do not activate this skill for adjacent work owned by other skills:
- Do not activate for platform-agnostic attention theory:
context-fundamentals. - Do not activate for writing AGENTS.md and skills manifests:
antigravity-customization. - Do not activate for Artifact lifecycle across long Manager sessions:
antigravity-session-management. - Do not activate for custom external RAG:
memory-systems.
Core Concepts
AGENTS.md as first-read context
Antigravity reads AGENTS.md at session start — project overview, constraints, verification commands, and "Do Not" rules. It is the highest-priority user-authored context layer and should stay lean; depth belongs in Skills or Knowledge Items.
Skills (.agents/skills/)
Skills follow the SKILL.md + optional references/ pattern — loaded on demand when relevant, mirroring progressive disclosure. Use for reusable capability packages (deployment procedures, domain workflows) rather than repo-wide invariants.
Knowledge Items (persistent memory)
KIs are curated facts distilled from past work — stored in Antigravity's Knowledge directory and checked at session start to avoid redundant rediscovery. Unlike chat history, KIs are edited, deduplicated knowledge — API schemas, business rules, architecture decisions.
What ships with it
1 file 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.
- 12d ago First seen · 72 lines · 102 tokens per session scan A f4411ad66587
antigravity-context-architecture is a skill published in the GitHub repository navendubrajesh/context-management-for-agents (2 stars, last pushed 2mo ago), licensed MIT. It adds 102 tokens to every session and 972 once invoked, about $0.0005 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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