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 GabrielAmz/web-anatomy --skill write-pagegit clone --depth 1 https://github.com/GabrielAmz/web-anatomyWrote 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/gabrielamz/web-anatomy/write-page)<a href="https://agentmods.dev/skills/gabrielamz/web-anatomy/write-page"><img src="https://agentmods.dev/badge/skills/gabrielamz/web-anatomy/write-page.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 5.1 | $0.00190 | $0.06376 |
| Opus 5 | $0.00095 | $0.03188 |
| Sonnet 5 | $0.00038 | $0.01275 |
| Haiku 4.5 | $0.00019 | $0.00638 |
Grade A, and why
write-page 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 8d 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 — 351 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Write Page
Classify -> capture -> route -> benchmark -> write. The flagship Web Anatomy copy engine: it writes the grounded words for a page, whether reworking an existing one (improve) or building a new one (build).
This is the Fix altitude of Web Anatomy: it turns a direction into grounded, copy-paste changes anchored to real benchmark pages, not generic advice. It is the executor the other skills hand off to. For a new page, build-page assembles what this skill writes into a shareable wireframe.
Two modes
This skill runs in one of two modes. Detect which from the request and the available inputs:
- Improve mode (default). An existing page or section. Capture its current reality, gap it against the benchmark, and write the fixes. This is the path when the user has a live URL, a screenshot, pasted copy, or a page in their codebase.
- Build mode. A new page or section that does not exist yet (the create lane). There is no current reality to capture and no gap to measure. Take the chosen structure (a user-picked section list, a
find-examplesstructure, or aresearch-best-practicestier) as the build spec, and write the sections from scratch, grounded in the same benchmarks. Skip the current-reality capture (Step 2) and the gap-vs-current framing; everything else (benchmark grounding, copy/design shaping, the report) is the same. If no structure exists yet, resolve it first with the light outline below. After the copy is written, the natural next step isbuild-page, which assembles the structure + this copy into a shareable wireframe.
Build-mode structure (the light outline)
The benchmark exposes section examples and page scores, but no page-level section list or order. So when build mode has no upstream structure, resolve one cheaply, do not over-build it:
- Pick one exemplar homepage. Use
find-examples/search_pagesfor the resolved industry and let the user pick the one whose layout they want to follow. That single exemplar carries the section order (read it off the screenshot) and later drives the design inbuild-page. - Adopt its section order, falling back to a sensible archetype default when unclear (hero -> problem -> value_proposition -> how_it_works -> features -> social proof / testimonial -> pricing -> faq -> cta).
- Confirm the section list with the user (let them add, drop, reorder). That confirmed list is the build spec.
What ships with it
3 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.
- 8d ago First seen · 351 lines · 190 tokens per session scan A e8b0a2453e2d
write-page is a skill published in the GitHub repository GabrielAmz/web-anatomy (8 stars, last pushed 2mo ago), licensed MIT. It adds 190 tokens to every session and 6,376 once invoked, about $0.0010 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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