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llms-visibility

Use when asked to make a site discoverable by LLM agents using llms.txt, Markdown content-negotiation, and alternate link headers. Not for remote, credential, publish, deploy, or irreversible changes.

.devin/skills/llms-visibility/SKILL.md

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Sep 28, 2026
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Apache-2.0

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# LLMs visibility

## Contract

| Field | Bound contract |
|---|---|
| Trigger | User wants a public site readable and discoverable by LLMs, or mentions llms.txt, Markdown Accept negotiation, or alternate link headers. |
| Authority | Reversible local: writes only named generated artifacts (llms.txt, optional llms-full.txt, route negotiation code, HTML link tags); rollback is undo. No remote mutation. Previews before overwriting existing files; no credentials or VCS changes. |
| Side effect | Writes llms.txt, optional llms-full.txt, adds text/markdown content negotiation on eligible routes, adds Link headers and HTML link tags where HTML exists. |
| Done | Every eligible route serves text/markdown with correct Content-Type and Vary on Accept: text/markdown; llms.txt parses under the documented Markdown-structured format; Link headers and HTML link tags are present where applicable; validation report lists every route and its headers. |

## Inputs

- Project root (required): the local codebase to modify.