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-customizationgit 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-customization)<a href="https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-customization"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-customization/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-customization"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-customization.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 | $0.00088 | $0.01032 |
| Opus 5.5 | $0.00035 | $0.00413 |
| Sonnet 5.5 | $0.00018 | $0.00206 |
| Haiku 4.5 | $0.00009 | $0.00103 |
Grade A, and why
antigravity-customization 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 2mo 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 — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Antigravity Customization
Antigravity's user-controlled steering surface centers on AGENTS.md (always read at session start) and .agents/skills/ (progressive-disclosure capability modules). Workflows, optional agent definitions, and MCP extend the stack. This skill covers authoring each layer with token budgeting and clear boundaries.
When to Activate
Activate this skill when:
- Creating or restructuring root or nested
AGENTS.md - Packaging reusable guidance as
.agents/skills/*/SKILL.md - Writing
.agents/workflows/for multi-step procedures - Antigravity ignores build/test instructions or violates "Do Not" rules
- Configuring MCP servers for Antigravity agents
Do not activate this skill for adjacent work owned by other skills:
- Do not activate for Knowledge Items and Artifact management:
antigravity-session-management. - Do not activate for how context pillars compose:
antigravity-context-architecture. - Do not activate for platform-agnostic instruction theory:
context-fundamentals. - Do not activate for MCP tool schema design:
tool-design.
Core Concepts
AGENTS.md layering
Place AGENTS.md at repo root for global invariants. Use nested AGENTS.md in subdirectories (frontend/, backend/) for scoped guidance — more specific files take precedence when working in that tree.
Priority content for AGENTS.md:
- Build, test, lint commands ("what done means")
- Forbidden paths and operations
- Architecture constraints agents cannot infer from code alone
- Verification expectations (especially for async Manager agents)
Keep under ~100 lines of dense, behavior-changing rules. Move procedures to Skills.
Skills in .agents/skills/
Follow standard skill structure: YAML frontmatter (name, description), under 500 lines, references/ for depth. Skills load on relevance — ideal for deployment runbooks, domain-specific workflows, or compliance checklists.
Workflows
.agents/workflows/ holds step-by-step guides the agent follows for repeatable processes. Workflows are procedural; Skills are capability-oriented — use workflows for linear sequences, skills for reusable knowledge packages.
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.
- 2mo ago First seen · 86 lines · 88 tokens per session scan A 974c0c342542
antigravity-customization is a skill published in the GitHub repository navendubrajesh/context-management-for-agents (2 stars, last pushed 1mo ago), licensed MIT. It adds 88 tokens to every session and 1,032 once invoked, about $0.0004 per session on Opus 5.5. 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.
antigravity-customization compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| antigravity-customizationnavendubrajesh/context-management-for-agents | Skill | 2 | 1mo ago | MIT | A | 88 | Claude Code, Codex |
| imagegenopenai/codex | Skill | 133k | yesterday | Apache-2.0 | A | 113 | Codex |
| playwright-climicrosoft/playwright | Skill | 99k | yesterday | Apache-2.0 | A | 19 | Claude Code |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | 4d ago | MIT | A | 200 | Claude Code, Codex |
| systematic-debuggingobra/superpowers | Skill | 313k | 3d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 95 | Claude Code |
| next-partial-prefetching-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 103 | Claude Code |