Agent Discovery

This skill is about an opinionated blend of traditional SEO, static truth in the initial response, and UX ergonomics for agents and operators.

Don't reduce this to "AI SEO".

If a page can't be crawled, cited, parsed, navigated, or actioned by an agent harness, it is broken in a way normal SEO reports won't fully show.

Thesis

Treat agent discoverability as four stacked layers:

1. Search baseline — crawlable pages, clean robots policy, sitemap, structured data, canonical answers, freshness.
2. Initial-response truth — the important facts must be present in the first HTML response.
3. Machine-readable projections — markdown/text/JSON surfaces that project the same canonical resource without drift.
4. Operator ergonomics — the site should be easy to drive from pi, OpenCode, Claude Code, ChatGPT, or a browser agent without guesswork.

If layer 1 is broken, you won't get found. If layer 2 is broken, agents won't extract the truth. If layer 3 is broken, harnesses waste tokens scraping HTML. If layer 4 is broken, operators and browser agents hit dead ends.

When to Use

Use this skill when the task mentions:

• agent SEO / AEO / GEO / LLM SEO / AAIO
• agent discoverability
• optimize site for ChatGPT / Claude / Perplexity / Copilot
• llms.txt / sitemap.md / markdown endpoints / content negotiation
• AGENTS.md / coding-agent docs / operator docs
• agent-friendly docs / machine-readable docs
• browser-agent UX / agent automation / accessible automation
• making a website easier for agent harnesses to use

Core Rules

1. Do the boring SEO work first

Before fancy protocols, verify:

• robots.txt allows the crawlers you actually want
• sitemap exists and stays current
• pages that should never rank use noindex
• titles, descriptions, H1s, and headings agree on the topic
• JSON-LD matches visible content exactly
• author/date/source signals are visible where trust matters
• stale pages get refreshed, redirected, or archived

Useful mental model from the audit side:

1. crawlability and indexation
2. technical foundations
3. on-page clarity
4. content quality / trust
5. authority / citations / mentions

2. Initial HTML is the truth surface

The important facts must survive:

• curl
• a text browser
• no-JS mode
• cheap retrieval pipelines

Don't hide core facts behind:

• client-only fetches
• tabs and accordions with empty initial HTML
• modal-only disclosures
• images or PDFs with no HTML equivalent
• click handlers on divs pretending to be controls

Static rendering is a principle, not a framework fetish.

A static shell with small dynamic holes is fine. A blank SPA shell is dogshit for both search and agents.

3. One resource, multiple truthful projections

Give the same resource multiple machine-friendly shapes:

• human page → text/html
• markdown twin or negotiated markdown → text/markdown
• API / structured route → application/json
• text hint surface (llms.txt, index text) → text/plain

The rule is projection, not duplication.

Do not maintain three separate truths for HTML, markdown, and JSON. Project them from one canonical content source.

4. llms.txt is a hint surface, not a ranking hack

Use llms.txt or similar text hints as:

• a fast discovery point
• a cheap orientation surface
• a pointer to better machine-readable endpoints

Do not claim it boosts ranking by itself. Google has been explicit: AI discovery does not require special AI-only markup.

5. AGENTS.md beats hoping skills trigger

For coding-agent surfaces, persistent repo context matters more than wishful tool invocation.

Vercel's evals are useful here:

• skills alone underperformed for general framework guidance
• explicit instructions improved triggering, but wording was fragile
• compressed AGENTS.md / repo-instruction context won for broad, always-on guidance

Use:

• AGENTS.md for persistent repo rules, paths, commands, retrieval hints
• skills for vertical, action-specific workflows

That split matters for pi, OpenCode, and Claude Code.

6. Accessibility is agent UX

Browser agents and automation stacks lean on the accessibility tree.

Prefer:

• real <a> links with href
• real <button> elements
• labels on form controls
• autocomplete where data entry matters
• proper landmarks and heading hierarchy
• explicit UI state (aria-expanded, role=status, aria-live)

If Playwright can't find it by role or label, an agent harness will likely struggle too.

7. Operator UX matters too

An operator using an agent harness should not need to reverse-engineer your product.

Good patterns:

• stable, guessable URLs
• obvious markdown twins or negotiated markdown
• copyable commands and prompts
• JSON responses that advertise next steps (next_actions / affordances)
• machine-readable discovery routes (/api, /sitemap.md, etc.)
• deterministic MIME types

Bad patterns:

• opaque blobs of JSON with no next move
• downloadable markdown buried behind UI chrome
• hidden routes that only work if you already know them
• HTML fallback pretending to be markdown
• "click around and figure it out" operator flows

joelclaw Implementation Map

When you need concrete evidence, start here.

Crawl + discovery surfaces

• apps/web/app/robots.ts
  • allows crawl globally and advertises both XML and markdown sitemaps
• apps/web/app/sitemap.md/route.ts
  • markdown discovery index with posts, ADRs, feeds, and .md twins
• apps/web/app/llms.txt/route.ts
  • plain-text hint surface pointing agents to sitemap.md, feed.xml, and markdown access

Markdown projections

• apps/web/proxy.ts
  • canonicalizes /{slug}.md and rewrites to the markdown route handler
• apps/web/app/[slug]/md/route.ts
  • renders real text/markdown; charset=utf-8
  • prepends agent context
  • rewrites internal links to other .md twins

Structured discovery + navigation

• apps/web/app/api/route.ts
  • API discovery endpoint with nextActions
• apps/web/app/api/search/route.ts
  • HATEOAS JSON search envelope with markdown snippets
• apps/web/components/clawmail-source-comment.tsx
  • source-visible navigation prompt telling agents which endpoints to hit and what MIME types to verify

Trust + rendering truth

• apps/web/app/[slug]/page.tsx
  • cached article shell, JSON-LD injection, visible metadata, copy-for-agent affordance
• apps/web/lib/jsonld.ts
  • BlogPosting / Blog / Person / BreadcrumbList helpers
• apps/web/lib/posts.ts
  • Convex-canonical content reads; HTML/markdown projections come from one source
• apps/web/components/copy-as-prompt.tsx
  • operator-facing affordance to grab a prompt directly into a harness

Static rendering example, not doctrine

• apps/web/next.config.ts
  • cacheComponents: true
• apps/web/app/[slug]/page.tsx
  • 'use cache', cacheLife, cacheTag for fast static shells with truthful invalidation

Use those as examples of the principle:

• cached shell
• canonical source
• small dynamic seams
• honest machine projections

Not as a claim that Next.js is the only valid way.

Verification Checklist

Crawl + indexing

curl -s https://example.com/robots.txt
curl -I -A 'OAI-SearchBot/1.3' https://example.com/
curl -I -A 'Googlebot' https://example.com/

Check Search Console and Bing Webmaster Tools too.

Initial-response truth

curl -sL https://example.com/page | rg -n 'important fact|<h1>|<table>|application/ld\+json'
lynx -dump https://example.com/page

If curl cannot see the fact, many agents will not either.

Markdown / text / JSON projections

curl -I https://example.com/sitemap.md
curl -I https://example.com/page.md
curl -sS https://example.com/api | jq

Verify exact MIME types:

• text/markdown; charset=utf-8
• text/plain; charset=utf-8
• application/json; charset=utf-8

If a markdown route returns text/html, treat it as broken.

Accessibility and browser-agent UX

• run Lighthouse / axe
• inspect the accessibility tree
• write Playwright tests with getByRole / getByLabel
• smoke the key flows with a browser agent, not just curl

Measurement

Track:

• AI referrers
• citation presence for core queries
• community mentions / repeated phrasing in the wild
• crawl success by user-agent
• content refresh cadence (30 / 90 / 180 day review works fine)

Anti-Patterns

• Over-indexing on framework-specific tricks instead of content truth
• Claiming llms.txt is the magic ranking lever
• Shipping agent protocols on top of broken crawlability
• Maintaining separate truths for HTML, markdown, and JSON
• Returning raw JSON with no next move
• Hiding important facts behind client-side interactivity
• Assuming accessibility is unrelated to agent automation
• Treating MCP as a substitute for honest routes and MIME types

Use This Mental Shortcut

Ask four questions:

1. Can an indexer find it?
2. Can a retriever extract the truth from the first response?
3. Can a harness get a cheaper markdown/JSON version without scraping?
4. Can an operator or browser agent actually drive the flow without guessing?

If any answer is no, fix that first.

That's the work.