Serve a .md file for every published guide

[ryanportfolio]

Problem

site/src/pages/llms.txt.ts told agents:

Every guide is also published as a plain-markdown skill file for agents: swap the guide URL's trailing slash for ".md"

That was false. site/src/pages/guides/[slug].md.ts only emitted a .md route for guides present in AGENT_ARTIFACTS: 10 of 36 published guides. Verified live on 2026-08-16: /guides/brief-the-model.md 200, /guides/new-claude-lineup.md 404, /guides/make-your-agents-proactive.md 404.

Fix

Make the claim true instead of narrowing it. /guides/<slug>.md now builds for all 36 published guides.

• The 10 guides with an agent artifact are unchanged. They still serve the skill or distilled agent file, byte for byte the same text the copy plate on the page offers.
• The other 26 serve a plain-markdown version of the guide itself: title, description, catalogue line, link back to the page, objectives, prerequisites, the converted body, the FAQ, and the sources.

Guide bodies are MDX shaped for the page, so site/src/data/guideMarkdown.ts converts them:

In the MDX	In the .md
<PullQuote />	Blockquote plus creator, work, timestamp, and link
<Exercise>	## Field exercise and its contents
<Chalk>	Blockquote
<p class="lede">	Plain paragraph
<SkillCopy />	One line pointing at the copy plate on the page, with the save path
<RoutineFlow />, <CompanionLog />	One line noting a figure sits there
<FirmwareCta />	Dropped, it is a site call to action, not guide content
<span class="sec-no">01</span>	Dropped, decorative numbering
<a href> and root-relative links	Absolute markdown links

Fenced code blocks pass through untouched.

llms.txt states the general rule again, and keeps the list (still derived from agentArtifactFor, so it cannot drift) of the 10 addresses that serve a ready-to-use file instead of the article.

Verification

npm run build in site/ passes, which runs the em-dash, heading-length, and layout copy gates. Checks over dist/:

md files: 36
guides listed in llms.txt: 36   md routes built: 36
listed guides missing a .md: []      .md with no guide listed: []
files with leftover markup: 0 of 36     (no JSX, HTML tags, braces, or imports outside code fences)
artifact route byte-identical to source file: true   (brief-the-model.md)
generated files with 3+ newlines: none      CR left in output: none
em dash in any generated md: none

Also spot-read the rendered output of new-claude-lineup.md, keep-a-growing-knowledge-base-accurate.md, automate-a-workflow-as-a-claude-routine.md, why-ai-makes-slop-and-how-to-catch-it.md, and power-start-sessions-with-enhance-prompt.md end to end: tables, code fences, links, pull quotes, exercise, FAQ, and sources all read correctly.

Not verified here: the live 404s can only be confirmed gone after deploy.