Now I have all the context I need. Let me create the 404 page.

Now let me verify it works by checking if the dev server is running and testing the page.

The custom 404 page is working. It returns a 404 status and renders the custom page with the data-testid="not-found-page" attribute.

Created apps/web/app/not-found.tsx with:

• Large 404 in accent color
• The site logo text treatment (> CS 199 UAI Spring 2026)
• "Page not found" message
• /home link styled like nav items
• Dot-pattern background, vertically centered, all in font-mono

One new file, no debug statements. Clean change.

Committed: 3dfc853 — "Add custom 404 page with terminal aesthetic"

Clean version bump across all packages (2026.2.18 → 2026.2.19), no debug statements.

Committed: 0b0fca6 — "Bump version to 2026.2.19"

The MDX content starts with # For Educators as the title. I'll add a byline right after the heading in the MDX file.

Let me verify it renders correctly.

Hmm, let me check if the page is rendering at all and if the MDX raw HTML/JSX is being handled.

No worries. Let me check the page now.

The byline is rendering correctly with the link to geoffreychallen.com. It's showing as expected: "by Geoffrey Challen" with the accent-colored link.

Clean, single change. No debug statements.

Committed: d9f8cd6 — "Add byline to educators page"

Looks like the dev server may not be running again. But the edit is straightforward — I added a "Get in Touch" section just above "Meetings So Far" with:

• An invitation to reach out about integrating AI into courses
• A mention of your CS1 course with a link to cs124.org/ai
• A link to your personal website as the contact method

Want me to verify once the server is back up, or does this look good?

Done. Updated the contact line to link to [email] instead.

Done — the email is now wrapped in backticks so it renders in monospace.

Let me look at the blog page structure and the current font options.

I see — the blog post page already has a date and author line (line 59-63), but it's date · author in monospace. You want it as "by Author, date" and are questioning the mono font.

The site uses two main fonts: font-serif (Crimson Pro) and font-mono (JetBrains Mono). Since the title is already serif, using serif for the byline too would feel natural and more readable — like a traditional article attribution. Here are the options:

Serif it is. Let me update the blog post page and the educators byline to match.

Now let me update the educators byline to use serif as well.

Done. Updated both:

• Blog post pages: Changed from date · author in monospace to by Author, date in serif
• Educators page: Switched the byline from font-mono to font-serif to match

Updated both: changed text-sm to text-base italic, and reduced the gap between title and byline (mb-4 → mb-2 on blog titles, -mt-4 → -mt-2 on the educators page).

Bumped both to text-lg.

Pulled it closer with -mt-4.

The h1's bottom margin from prose styles is likely overriding the negative margin. Let me check how the Prose component styles headings.

No custom prose-uai styles — so the h1 margin is coming from the MDX rendering. The gap is between the # For Educators h1 and the <p>. Since negative margin isn't cutting through, let me use a larger value.

Increased to -mt-8 — that should close the gap noticeably. How does that look?

You're right — the className might not be getting applied in MDX context. Let me check how MDX components handle this.

There's the problem. Line 60-62: the p component override ignores any className passed from MDX — it always applies its own hardcoded className. So the <p className="..."> in the MDX has its classes stripped.

The simplest fix is to use a <div> instead, which doesn't have an override.

Switched from <p> to <div> so the className actually applies (the MDX p override was stripping custom classes). Starting with -mt-4 — how does that look?

The h1 has mb-8 (2rem of bottom margin). Let me try fully counteracting it.

Wait — you said -mt-4 didn't show up in the parsed CSS at all. That means Tailwind isn't generating these classes. This is likely because Tailwind's content scanning doesn't pick up classes inside MDX files. Let me check the Tailwind config.

There it is — the content array only scans ./app/ and ./components/, not the content/ directory where educators.mdx lives. So Tailwind never generates the utility classes used in that file.

Rather than modifying the Tailwind config (which could have broader implications), the cleaner approach is to use inline styles on the MDX <div>.

Switched to inline styles using CSS variables so it works regardless of Tailwind scanning. The -1.5rem top margin should pull it noticeably closer to the title. How does that look?

Add the content/ directory to the Tailwind content config so it scans MDX files there for classes.

Now revert the inline styles back to Tailwind classes.

Now Tailwind will scan content/**/*.{md,mdx} and generate the utility classes. The dev server may need a restart for the config change to take effect.

Good point. The issue might be that Tailwind v4's content scanner doesn't recognize .mdx/.md extensions by default. Let me check the actual Tailwind version and how sources are configured.

Tailwind v4. In v4, content detection is automatic and uses @source directives in CSS rather than the content array in config. And by default it only scans known file extensions — .md and .mdx are likely not included.

Tailwind v4 scans sources as plain text looking for class-name-like tokens, but its automatic detection may not include .mdx/.md files. The @source directive just takes a path/glob — let me check if it supports extension filtering.

Got it. In Tailwind v4, the right approach is to add a @source directive with a glob pattern in the CSS file. Let me revert the tailwind.config.ts change and use @source instead.

Added @source "../../content/**/*.{md,mdx}"; to globals.css. This tells Tailwind v4 to scan the content directory for class names in markdown and MDX files. The dev server likely needs a restart for this to take effect.

Sources:

• Detecting classes in source files - Tailwind CSS
• Tailwind CSS v4 @source glob pattern issue

Interesting — so the @source is working (classes like mb-6 are generated), but -mt-4 specifically isn't. The negative prefix - is likely tripping up the content scanner's tokenization.

The cleanest fix is to stop fighting MDX margins and handle the byline in the page component instead, just like the blog posts do.

Now add the title and byline to the page component.

Now the byline is in the page component with full control over spacing, matching the blog post pattern exactly. The mb-2 on the h1 keeps it close to the byline. How does that look?

You're right. Since we moved the byline into the page component (which is the proper fix), the @source addition to globals.css was a workaround for a problem we don't fully understand. Let me revert it.

Reverted. The only remaining changes now are:

• apps/web/app/educators/page.tsx — byline in the component (like blog posts)
• apps/web/app/blog/[slug]/page.tsx — "by Author, date" in serif italic
• content/educators.mdx — removed the h1 and inline byline (title now in component)

The tailwind.config.ts and globals.css are back to their original state.

I notice the educators/page.tsx imports Link from next/link but doesn't use it (the byline uses ExternalLink). Let me remove that before committing.

Clean. Two logical commits make sense here — the blog byline change and the educators page changes together:

Two commits:

• 7f49835 — "Add serif italic byline to blog posts"
• 855a26b — "Move educators page title/byline into component, add Get in Touch section"

Now let me read the syllabus to cross-reference.

Now I have both documents. Let me cross-reference and identify discrepancies. Let me also check the config for meeting counts.

Good, now I have a clear picture. Let me write the plan.

Here's what I found cross-referencing the educators page against the syllabus:

1. "one-credit seminar" → should be three-credit course (syllabus says "3 credit hours")
2. "non-CS students" → should be non-technical students (syllabus says "no programming or technical background")
3. "seminar" → not accurate; it's a structured course with labs, discussions, exploratory sessions, quizzes, and a final project
4. Assessment description is wrong — the page says "no exams... assessment is entirely through conversational assessments and class participation," but the syllabus has CBTF quizzes (35%), lab/discussion exercises (50%), a final project (10%), and a final video (5%)

Everything else (meeting frequency, meeting types, two-agent architecture, etc.) checks out.

Good point. Let me update the plan.