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 G1Joshi/Agent-Skills --skill gatsbygit clone --depth 1 https://github.com/G1Joshi/Agent-SkillsWrote 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/g1joshi/agent-skills/gatsby)<a href="https://agentmods.dev/skills/g1joshi/agent-skills/gatsby"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/gatsby/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/g1joshi/agent-skills/gatsby"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/gatsby.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 | $0.00017 | $0.00273 |
| Opus 5 | $0.00009 | $0.00137 |
| Sonnet 5 | $0.00003 | $0.00055 |
| Haiku 4.5 | $0.00002 | $0.00027 |
Grade A, and why
gatsby 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 9d 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.
What it actually says
Gatsby
Gatsby v5 focuses on Valhalla Content Hub and improved build speeds (Slice API). While Next.js has overtaken it, Gatsby remains strong for complex CMS-driven sites.
When to Use
- Data Integration: You have content in Contentful, Shopify, and WordPress and need to merge it.
- Static Sites: Extremely optimized static output (Image optimization).
- Plugin Ecosystem: Thousands of "drops-in" plugins.
Core Concepts
GraphQL Data Layer
Gatsby pulls all data into a local GraphQL schema.
Source Plugins
gatsby-source-filesystem, gatsby-source-contentful.
React Hydration
Generated HTML rehydrates into a SPA.
Best Practices (2025)
Do:
- Use Slice API: Updating a navbar shouldn't rebuild 10,000 pages.
- Use Gatsby Image: Unmatched image optimization features.
- Use Adapters: For zero-config deployment to Netlify/Vercel.
Don't:
- Don't use for Dynamic Apps: Use Next.js or Remix for dashboard-style apps.
References
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.
- 9d ago First seen · 45 lines · 17 tokens per session scan A 0ad973b1f194
gatsby is a skill published in the GitHub repository G1Joshi/Agent-Skills (12 stars, last pushed 7mo ago), licensed MIT. It adds 17 tokens to every session and 273 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 2026-09-03.
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