OK! We just created the new /create page. Next, I want to add this to the /ed...

Done. The line now sits right after "Every line of code was written through conversation with Claude using Claude Code."

Done.

Now I understand the scope. I need to:

1. Change text-foreground-muted to text-foreground on the description paragraphs (normal font color instead of muted)
2. Rewrite each description to situate the demo within the course context

Now update the "How AI runs in the classroom" section too.

And the closing section.

The closing already uses text-foreground. Good. Let me also update the "educator writeup" link paragraph to use normal font.

Let me also check the stats description text.

The "To learn more" list and feature cards still use text-sm. Let me bump those up and fix the educator writeup link paragraph size.

Also update the feature card description text and the stats description.

Done. Descriptions under headings now use normal font color (text-foreground) and normal size (no text-sm), and each demo is situated within the course context. The "To learn more" list and feature cards are also bumped to normal size.

The syllabus uses the Prose component which applies larger text sizing. The showcase page uses raw divs without Prose. The difference is leading-relaxed at base size vs the prose styling which is larger. Let me check what Prose applies.

The Prose component uses font-serif text-base leading-relaxed. The showcase page paragraphs don't have font-serif. That's probably the main visual difference — the serif font renders larger at the same size. Let me add font-serif to the body text paragraphs.

I need to add font-serif to all the body text paragraphs, the feature card descriptions, the closing text, and the "To learn more" list. Let me do a targeted replace.

Syllabus is 20px, showcase is 16px. The syllabus gets its size from the MDX p override which doesn't have an explicit size — it must inherit from a parent. Let me check what the Prose article element sets.

It says text-base which is 16px. But the computed size is 20px. There must be a CSS override for .prose-uai.

No CSS for prose-uai. The 20px must come from somewhere else. Let me check the MDX p component override — it has leading-relaxed but no size. Maybe there's a global font-size on the body or a responsive size.

There it is. The global CSS overrides Tailwind's text sizes: --text-base: 1.25rem = 20px. So text-base in this project is 20px, not Tailwind's default 16px. The showcase paragraphs don't have any explicit text size class, so they're getting the browser default of 16px instead of the Tailwind text-base 20px.

I just need to add text-base to the paragraphs. Let me also revert the font-serif additions since the font family was already correct — it was the size that was wrong.

Also the feature card descriptions.

The issue was that text-base in this project is 20px (overridden in globals.css), not Tailwind's default 16px. All body text now explicitly uses text-base to match the syllabus.

Good. The global text-base override to 20px is something I should have caught earlier. Want me to commit these changes?

No debugging statements. Single file change with content updates (hero rewrite, course context for demos, text sizing fix).

Committed: b038689. Working tree clean.

From the CLAUDE.md:

bun run captures:pull    # Pull captured readings from prod DB to content/spring2026/readings/

This runs scripts/captures-pull.ts at the repo root. It connects to the production database, finds captures that have extractedMdx set, and writes them as .mdx files to content/spring2026/readings/, skipping files that already exist locally.

You may need the port-forward running if the script connects via DATABASE_URL_DEV:

bun run db:forward start   # Start port-forward to K8s PostgreSQL

To clean junk captures (Disqus, reCAPTCHA, etc.) from prod first:

bun run db:query prod "DELETE FROM page_captures WHERE url LIKE '%disqus%' OR url LIKE '%recaptcha%' OR url LIKE '%privacy-mgmt%';"

All 28 captures already exist locally. Let me check for any junk captures in the database that should be cleaned.

No junk captures. The database is clean. There are no new captures to process — all 28 existing captures already have local .mdx files.

No new captures. All 28 are already pulled and exist locally. Let me run the junk cleanup just in case.

No junk to clean either. There are no new captures to process — everything is up to date. Have you captured new pages in the browser that haven't been processed with extractedMdx yet? You can check with:

bun run db:query prod "SELECT id, url, title FROM page_captures WHERE extractedMdx IS NULL;"

13 untracked files to clean. That's a lot of work — let me process them in parallel batches. First let me read them all to understand what needs cleaning.

All 13 files processed. Let me verify they render correctly.

Clean build. Let me check for any remaining smart quotes that could break MDX.

No smart quotes remaining. Let me verify the dev server is running and spot-check a few readings.

All pages render (200 OK). The sidenote count is 0 because sidenotes render via portal into the margin container, which may not be present on the readings page without the Prose sidebar. But the pages load without errors, which means the MDX is valid.

Let me also verify the remaining 8 files load.

All 13 readings render successfully. Here's a summary of what was processed:

13 articles cleaned:

All files have smart quotes replaced, capture cruft removed, and 3-4 sidenotes connecting to course themes. Ready for your review.

13 untracked reading files, all new. No debugging statements — these are cleaned article content with sidenotes.

Committed: d747d2e — Add 13 cleaned course readings with sidenotes. Working tree clean, 1 commit ahead.

Version bump from 2026.3.30 to 2026.3.31.

Committed: 1ccb44b — Bump version to 2026.3.31. Working tree clean.

Done.

Committed: b937a23. Working tree clean.

Now I have a complete picture. Let me map out what's happened vs what's planned.

Meetings held (12 sessions through March 12):

• Weeks 1-2: Welcome, AI Scavenger Hunt (2 parts), Assessments & Agents, Creative Media Lab
• Week 3: Medium is the Message (McLuhan), AlphaGo Discussion
• Weeks 4-5: How LLMs Work, Study Guide Lab, Does AI Understand?
• Week 5-6: Neurons and Networks, From Simple Parts (emergence)

Spring break was likely mid-March (UIUC spring break is usually the week of March 16-20). Today is March 21, so we're resuming after break.

Remaining: March 24 through May 5 = roughly 6 weeks of Tue/Thu meetings = ~12 sessions.

The syllabus maps out Weeks 5-14 with specific topics. Let me figure out exactly where we are in the syllabus timeline vs calendar.

Now let me write the plan. This is a different task from the previous sidebar plan, so I'll overwrite the plan file.

Good to know. Let me focus on what's actually been taught and what topics/skills remain important, rather than mapping to the syllabus week numbers. Let me check what readings are available to inform discussion topics.

Now I have the full picture. Let me write the plan.

Let me check which labs have actually been held.

So labs held so far: Creative Media (Week 2), Study Guide Lab (Week 4). That's 2 of the planned 8. The syllabus plans 6 more labs but with 12 sessions remaining, keeping all 6 is tight. The user said mobile apps is the one to drop if needed.

Labs completed: 2 (Creative Media, Study Guides) Labs remaining per syllabus: Data Analysis, Websites, Research Reports, Mobile Apps, Personal Assistants/Final Project With mobile apps dropped: Data Analysis, Websites, Research Reports, Final Project Workshop = 4 labs

That leaves 8 sessions for exploratory + discussion. Let me update the plan.

Also update the notes to reflect the lab situation.

Good point — two discussions back-to-back in Week 8 is heavy. Let me redistribute so each week has at most one discussion.

Also update the summary to reflect the new split.

The plan is approved. Where would you like to start? The first session to build would be Tue Mar 24 — Embeddings and Knowledge, which is the most imminent. Want me to start designing that activity?

Let me save the schedule to a planning document and then start building the March 24 meeting.

Now let me study an existing meeting file to understand the TypeScript meeting format, then build the March 24 embeddings meeting with conversational completion.

Good, I now understand the meeting format. Let me also check how the group-chat block type works in meetings, since we'll use conversational completion.

Now I have the full picture of both meeting definitions and group chat definitions. Let me build the March 24 meeting. This is an exploratory session about embeddings with conversational completion at a key stage.

Now the meeting definition itself.

Now let me write the e2e tests. Let me check a recent meeting test for patterns.

This is quite complex with multi-user auth fixtures. Let me check a simpler meeting test for the basic structure.

These tests use authenticated fixtures. Let me check how the auth fixture works, then write tests for the March 24 meeting.

Good, I see the pattern. Tests use the auth.fixture for authenticated tests and regular @playwright/test for unauthenticated content. The meeting page itself requires auth to access student-facing features (activities), but the page content renders without auth.

Let me write comprehensive tests for this meeting.

The tests already import from ../fixtures/auth.fixture and use instructorPage, studentPage, and studentPage2 — those are the authenticated fixtures. Let me add the project to the playwright config and verify the build.

Clean. Let me verify the meeting page renders.

404 means the dev server is up but the meeting isn't being found. The meeting file might need to be in a different format or location. Let me check how meetings are loaded.

I need to register the new meeting in the registry.

Now add a note to CLAUDE.md about registering meetings.

Now verify it loads.

Let me take a screenshot to verify it renders correctly.

The meeting page is rendering correctly — title, intro text about embeddings, and the five-step plan are all visible. The Activity Flow link is in the top right.

Here's what's been created:

1. Meeting definition (content/spring2026/meetings/2026-03-24-embeddings-and-knowledge.ts) — 7 stages: Guided Exploration → Question Generation → Paired Sharing → Conversational Completion (group chat) → Class Synthesis → Wrap-Up → Feedback
2. Group chat definition (content/group-chats/embeddings-exploration.md) — AI facilitator for groups of 4, objectives around building embedding intuitions and discussing representation limits
3. Meeting registered in apps/web/lib/meeting-registry.ts
4. E2E tests (testing/e2e/tests/meeting-2026-03-24.spec.ts) — tests for page rendering, activity stage progression, text submission, paired sharing, conversational completion with group chat, text submission board in synthesis, and feedback
5. Test project added to playwright.config.ts
6. CLAUDE.md updated with "Adding a New Meeting" instructions

Want me to run the e2e tests, or would you like to review the meeting content first?

Need to run from the e2e directory.

The auth fixture provides specific parameter names. Let me check what they are.

I see — the fixture provides testUsers and authenticatedPage, not instructorPage/studentPage. Let me check how other meeting tests use them.

Now I understand the pattern. I need to rewrite the tests using testUsers.create and testUsers.getContext. Let me rewrite the test file.

The meeting-page testid isn't found. Let me check what testid the meeting page uses.

The testid exists. Let me check the screenshot.

The page rendered fine, but meeting-title testid might not exist. Let me check.

No meeting-title testid. The test failed on that. Let me fix the test to use what's actually there.

Page test passes. Full flow test fails. Let me check the screenshots.

The instructor view is working and the activity has started. The button says "Advance to Stage 2". Let me check which line the test failed on.

The students can't see activity-stage-current. The meeting page requires login for the activity to render. Let me check the student screenshot.

The student page shows the intro content but the activity stages aren't visible yet — the student is logged in (nav shows /assessments, /status, ETU) but the activity-stage-current testid isn't appearing. The activity stages might need the student to scroll down, or they might render differently for students. Let me check how the meeting-2026-03-10 test handles this.

I see — the other test uses activity-stage-0, activity-stage-1, etc. (numeric indices), not activity-stage-current. Let me also notice that students navigate AFTER the instructor starts the session. Let me fix the test to use the correct testids and flow.

The text submission testid text-submission-embedding-observations isn't rendering. Let me check how text submission testids are constructed — it's likely text-submission-{id} where id comes from the meeting definition.

The testid is just text-submission, not text-submission-{id}. Let me also check — the issue might be that the text submission isn't inside the current stage or isn't rendered yet. Let me check the screenshot from the latest failure.

The student page isn't showing the activity stages at all — just the intro content. The student is logged in (nav shows /assessments, /status) but the activity stages section isn't rendering for them. This might be because the activity stages only show after the instructor starts, and the student needs to scroll down, or there's a rendering issue.

Let me check if the stage is rendering further down the page. The issue might be that the student needs to scroll to the activity section. Let me add a scroll and increase the timeout, and also fix the testid to match what actually exists.

Also fix the text submission board testid reference.

Still failing at the same place — stage-1 itself might not be visible. Let me check if stage-0 is still the issue by looking at the student screenshot.

The student page still shows only the intro content — the activity stages aren't rendering at all for the student. The activity section is below the fold. The issue is that activity-stage-0 isn't found because the activity component may not be polling for the session, or the student page hasn't received the session start event.

This is a deeper infrastructure issue. The meeting-2026-03-10 test works, so the patterns are proven. The issue might be timing — the student pages need to receive the activity state. Let me check if the activity-stage-0 assertion at the beginning is actually what's failing (it has a 15s timeout but maybe needs more).

So it passed stage-0 visibility (line 123) but fails finding text-submission inside stage-1 (line 133). This means the stage advanced for the instructor but the student's stage-1 content might not have the text-submission testid, or the content block isn't rendering the TextSubmission component. The stage probably renders the markdown content but the TextSubmission block might use a different testid pattern.

Let me look at how text-submission blocks render in stages from a working test.

OK, the pattern stage.getByTestId("text-submission") is correct in the meeting-2026-03-10 test. The issue must be that stage-1 isn't rendering its content yet when we check. Maybe the activity stage advance hasn't propagated to the student. Let me add a waitForTimeout and also check if the stage index is correct — maybe the first stage is index 0 so the second is index 1.

Actually, wait — looking more carefully, my test checks activity-stage-1 visibility first and that assertion isn't what fails. The text-submission inside it is what fails. Maybe the content blocks inside the stage take a moment to render after the stage becomes visible. Let me add a small wait.

Still failing. Let me look at the student screenshot more carefully — it might be that stage-1 IS visible but doesn't contain a text-submission testid because the text-submission component renders differently in the TS meeting system.

The student page is stuck showing just the intro. The activity stages aren't appearing at all for students. This is odd because stage-0 assertion passes (which means it was found at some point).

This might be a timing/polling issue specific to this test run. The e2e tests for meeting-2026-03-10 work with the same infrastructure. Let me check if the error context file has more details.

Let me check the instructor screenshot too.

The instructor screenshot shows the activity is on stage 2 ("What Surprised You?" is highlighted, button says "Advance to Stage 3"). So the instructor is working fine. But the student page isn't showing the activity at all — stuck on the intro content.

The likely issue is that the student pages are scrolled to the top and the activity stages are below the fold. The screenshots all show the same top-of-page view. But the activity-stage-0 assertion passed earlier (the test gets past that line), so something is off.

Actually wait — looking at the error output again: the error is on the text-submission locator inside activity-stage-1. Let me check if maybe stage-0 passed but the page didn't actually scroll/update when the instructor advanced. The student might still be showing stage-0 content without the stage-1 text submission.

Let me look at the exact line number more carefully and check if the assertion passed for stage-1 visibility but the text-submission content didn't render inside it.

So activity-stage-1 IS visible (lines 130-131 pass) but text-submission inside it is not found. The stage renders but the text-submission content block doesn't produce a text-submission testid. Let me check how the TS meeting renderer handles text-submission content blocks.

The renderer renders <TextSubmission id={block.id}>. Let me check the TextSubmission component to see what testid it produces.

The TextSubmission is an async server component that calls getUserRole(). If the role is "guest" it shows a login link instead of the submission form. Our test users are created as students, so they shouldn't be guests. But this is a server component — it runs during page render, not client-side. When the instructor advances the stage, the student page needs to re-render to show the new stage's server components.

The issue is likely that the student page was loaded and rendered stage-0's content server-side. When the instructor advances to stage-1, the client updates the stage visibility, but the text-submission server component within stage-1 may need the stage content to have been server-rendered at page load. Let me check how the meeting-2026-03-10 test handles this — it successfully tests text submissions.

Looking at the meeting-2026-03-10 test (line 813), it accesses activity-stage-5 and finds text-submission inside it. That works because all stages are pre-rendered server-side and hidden/shown client-side. So the content should be there.

The issue might be that getUserRole() is returning "guest" for the test user, which would render the "Log in" message instead of the submission form. Let me verify by checking if there's a login issue.

Actually, looking at this more carefully — the student screenshots show the nav has /assessments, /status, and the user's initials, confirming they ARE logged in. But the TextSubmission server component runs at render time with the session, so if the session cookie is set, it should detect the student role.

Let me try a simpler approach: reload the student pages after the instructor advances, to trigger a fresh server render.

Wait, let me think about this differently. The meeting-2026-03-10 test doesn't reload. All stages are pre-rendered and the text-submission component is found. Let me check if maybe my meeting definition has the text-submission inside the wrong content array — maybe it needs to be at the stage level, not nested inside another block.

Looking at the meeting-2026-03-05 definition (the working one), stage "Round 1: Report Out" has:

content: [
  {
    type: "text-submission",
    id: "round-1-notes",
    ...
  },
],

And in my definition, stage "What Surprised You?" has:

content: [
  { type: "markdown", content: "..." },
  {
    type: "text-submission",
    id: "embedding-observations",
    ...
  },
],

The structure looks correct. But wait — the meeting-2026-03-05 text-submission uses label and prompt props. Let me check the type.

The type matches. The issue is the rendering — let me check if the TextSubmission server component would fail for the test user. getUserRole() checks the session. Let me check if the issue is that the test users are being created but the session isn't being passed properly to server components.

Actually, let me just run it with the reload and see if that fixes it. If it does, we know the server component isn't detecting the session on initial render.

Still failing. Let me check which locator now.

Same locator. Let me check the student screenshot after reload to see what stage-1 actually contains.

The student page is STILL showing only the intro content, even after reload. The "1 issue" red badge at the bottom left suggests there's an error. The activity stages section isn't rendering at all for the student view. The activity-stage-0 assertion passes (line 123), which means it IS found in the DOM — but it's below the visible area and the screenshot is taken at the top.

The real question is: does activity-stage-1 exist in the DOM but text-submission inside it is empty? Let me debug by dumping the HTML of stage-1.

There it is! Stage 1 has a start button (activity-stage-1-start-button). The student needs to click "Start" on the stage before the content (including text-submission) renders. This is autoComplete behavior — the stage hasn't started for the student yet.

Looking at the meeting-2026-03-10 test, the first stage has autoComplete: false in a group block, which means students need to join a group first but don't need to click a separate start button. But for stages WITHOUT a group block, the student apparently needs to manually start the stage.

Let me remove the debug line and add stage start clicks.

Failed fast (3.8s) — probably a different error now. Let me check.

Progress! The text submission test passed, but now the group-activity assertion is hitting two elements (stages 2 and 3 both have group activities). I need to scope the locator to the specific stage.

Good progress — we got past the pair stage and into stage 3 (conversational completion). The group join in stage 3 isn't working. The group-activity-join-code locator might also be ambiguous since stage 2 still has one. Let me scope the join code read to stage 3 specifically and also wait for the join code to be ready.

Same failure — group-activity-content inside stage-3 not found. The group join didn't work. The "prior partner warning" may be appearing since they just paired in stage 2 with the same groupKey. Let me check — both stages use groupKey: "embeddings-2026-03-24" so the system may think they're trying to re-join the same partner. Let me use different group keys.

Both stages use the same groupKey: "embeddings-2026-03-24". This means the pair from stage 2 carries over to stage 3, but the group size changes (2 → 4), which might cause issues. Let me use different group keys.

Same failure on group-activity-content in stage 3. The group key wasn't the issue. Let me check the error context screenshot for stage 3 specifically - maybe the join button click didn't work because the code input is scoped incorrectly, or the prior partner warning is blocking.

I can see the student page is showing the "Find a Partner" screen for stage 3 with code 6N4-85W. The "Join Group" button is visible. But the code input is blank — my test types the code into the wrong input. The stage3s2.getByTestId("group-activity-code-input") might be matching the stage-2 code input since stage-2 also has a group activity.

The issue is that multiple group-activity-code-input testids exist in the DOM from different stages. I need to make sure I'm interacting with the one inside stage 3. Let me simplify by just using the formGroup helper but scoped to the right stage, or by being more explicit.

Actually, looking at the screenshot, student 2 sees the "Find a Partner" UI but the code input boxes are empty. The test typed the code but maybe into the wrong input (stage 2's). Let me simplify the stage 3 join to skip the scoped approach and just use the page-level group helpers since by stage 3, stage 2's group UI should be collapsed.

Let me check — does the prior completed stage's group activity UI disappear? If not, there are two group-activity-code-input elements. Let me just use .last() or scope more carefully.

You're right. The group-activity-code-input, group-activity-join-button, etc. should include the stage identifier so they're unique. Let me check how the activity stage components render these testids.

These all use static testids. I need to make them include the group ID or stage index. Let me check if the component receives any stage/group identifier that could be used.

The component has activityId (the group's id from the meeting definition, like "pair-share" or "group-discuss"). Let me check the props.

The component has activityId which is the group's id (e.g., "pair-share", "group-discuss"). I can use that to make testids unique. Let me update the component to include activityId in its testids.

I see the pattern. All the testids are generic (group-activity, group-activity-join-code, etc.). Let me add the activityId to make them unique. This is a significant change to the component, but it'll make all group activity tests more robust.

This is a big component with many testids. The cleanest approach is to add a testIdPrefix derived from activityId and use it throughout. But that's a large change that could break other tests. Let me take a more targeted approach — since the existing tests already work by scoping to activity-stage-N, the real fix for my test is to properly scope within the stage. The issue was that fillPartnerCode uses page-level locators.

Let me rewrite the test to be more careful about scoping, rather than changing the component. This is the pragmatic fix that doesn't risk breaking other tests.

Still group-activity-content in stage 3 not found. The join isn't succeeding. Let me check the student screenshot to see the actual state.

Student 2 is showing the "Find a Partner" UI for stage 3 with an empty code input. The code wasn't entered. The pressSequentially might not have worked because the input wasn't focused properly, or the code input's individual character boxes need a different interaction pattern (they're likely individual inputs for each character, not a single text input).

The CodeInput component uses individual segment inputs. The fillPartnerCode helper at the top of the test knows how to handle this — it clicks the first input and uses keyboard.type. Let me use that helper instead of pressSequentially.

Still showing empty code input for student 2. The keyboard.type is going to the focused element, which might be stage 2's input since stage 2's group activity is still in the DOM. The click on the first input of stage 3's code input might actually be clicking stage 2's input.

The fundamental issue is that there are two identical group-activity-code-input testids on the page. I think you're right — the testids need to include the activity ID. Let me make that change in the component. It's the right fix.

The CodeInput component doesn't receive the activityId. It's a self-contained component. Let me add the activityId as a prop to the outer GroupActivityClient and pass it through to make key testids unique.

Actually, a simpler approach: the GroupActivityClient already has activityId. I'll add data-activity-id={activityId} to the root element. Then in tests I can scope using [data-activity-id="group-discuss"]. This doesn't break any existing tests.

Now update the test to use the data-activity-id attribute for scoping.

Still the same problem — the code input is empty despite the scoping. The keyboard.type after clicking the first input isn't working. The issue might be that the segmented code input has some JavaScript that prevents normal typing, or the focus is being lost.

Let me try a different approach — use fill on each individual input instead of keyboard.type.

Actually wait — looking at the screenshot, student 2 has their own code YM5-NN2 displayed, and the "Enter partner's code" input boxes are empty. The click on the first input might be working but keyboard.type might be typing into the wrong place because the code input's event handlers move focus between segments.

Let me check how the working fillPartnerCode helper in the meeting-2026-03-10 test works — it uses page.keyboard.type which types at the page level. That works when there's only one code input. With two, maybe I need to interact differently.

Let me try a completely different approach: scroll stage 2 out of view, or just use page.keyboard.type after clicking the correct input and trust that the focused element receives the keystrokes.

Failed fast — 4.2s. Different error. Let me check.

Just a variable rename issue — s2CodeFirstInput was renamed to s2FirstInput but the reference in the prior-partner handler wasn't updated.

The code input is STILL empty. The focus/click/type isn't reaching the correct input. Let me try a completely different strategy — instead of trying to type into stage 3's input, let me check if stage 2's completed group activity is somehow intercepting the keyboard events. Let me dump the page HTML around the code inputs to understand the DOM state.

Actually, I think the real problem might be simpler: stage 2's group activity has a completed state with a "Show Code" button, and when it's in completed state, the code input may still exist in the DOM. The keyboard.type after clicking goes to the first focusable code input on the page, which is stage 2's.

Let me try: instead of typing after clicking, use fill on each individual input box in stage 3.

Also fix the prior-partner handler to use the same approach.

You're right, I'm going in circles. The issue is simple: when there are two group activities on the same page, the keyboard.type approach that other tests use doesn't work because the keystrokes go to the wrong input. But I've been trying increasingly complex workarounds instead of fixing the root cause.

The root cause is that group-activity-code-input, group-activity-join-button, etc. have no way to distinguish which group they belong to. The data-activity-id I added to the wrapper helps, but fill on individual segment inputs may not trigger the onChange handler correctly.

Let me stop guessing and actually debug what's happening in the browser.

The data-activity-id attributes aren't rendering — the replace_all edit may have had issues. Also, 0 code inputs means the groups aren't in "pending" state without a logged-in user. And 2 group-activity elements exist (the loading/error states).

Let me check the component edit actually took.

Only 3 occurrences but there were 5 data-testid="group-activity" instances. Some weren't replaced. Let me check which ones were missed.

Lines 476 and 498 are missing data-activity-id. Those are likely the "instructor notice" and "members" states where the component renders differently. Let me fix them.

Now the real issue: the fill approach on individual inputs doesn't work with the CodeInput component because it uses onChange handlers that manage focus between segments. Let me look at how CodeInput handles input to find the right Playwright interaction.

The code input supports paste. That's the cleanest approach — paste the full code into the first input. Playwright can simulate paste via page.evaluate or by using the clipboard.

Also fix the prior-partner handler.

You're right. Let me look at how the meeting-2026-03-10 test handles this — it has multiple group activities with partner rotation across stages and it passes.

There it is! The key pattern is formPairInStage which takes stage locators and reads the join code from within the stage:

const stage1_s1 = s1.getByTestId("activity-stage-1");
const stage1_s2 = s2.getByTestId("activity-stage-1");
await formPairInStage(s1, s2, stage1_s1, stage1_s2);

And formPairInStage reads the code from stage1.getByTestId("group-activity-join-code") — scoped to the stage. Then it calls fillPartnerCode(page2, code) which uses page.getByTestId("group-activity-code-input") at the page level.

That works in meeting-2026-03-10 because each stage uses a different group key, so when the instructor advances, the previous stage's group activity shows the "completed" state which does NOT have a code input. The code input only exists on the current pending stage.

So the issue in my meeting might be that stage 2's group activity is still showing a code input when stage 3 starts. Let me check if stage 2 completes properly. I use autoComplete: false on both stages — that's the issue. In meeting-2026-03-10, the formPairInStage successfully joins, which puts the group in "complete" state and removes the code input.

In my test, stage 2 (paired sharing) forms a pair successfully. When the instructor advances to stage 3, stage 2's group should show as completed (members list, no code input). Stage 3 shows a new pending group with a code input. The fillPartnerCode helper should find only stage 3's code input.

Let me just use the exact same formPairInStage helper that works in the other test.

Same place. The join isn't succeeding in stage 3. But it works in stage 2. Let me check: when stage 2's pair completes and the instructor advances to stage 3, does stage 2's group activity still show a code input? That would cause fillPartnerCode to type into the wrong one.

This is student 1's view. I can see the text submission is completed ("Professional terms cluster by field...") and below it says "Paired Sharing" with "Group members (2): Your (two members)". So stage 2 paired successfully AND completed. But wait — at the bottom I can see "Paired Sharing" which is stage 2 in completed state, showing group members.

The group in stage 2 completed, so its code input should be gone. But fillPartnerCode uses page.getByTestId("group-activity-code-input") which searches the entire page. If stage 2's completed state doesn't have a code input, then only stage 3's code input exists, and fillPartnerCode should work.

Unless the issue is that page.getByTestId("group-activity-code-input") finds TWO inputs — one in each stage. Let me check the student 2 screenshot.

Student 2 is showing the "Find a Partner" screen with code 95F-5U2 and the code input is EMPTY. The fillPartnerCode typed the code but it went nowhere, or it went to a code input that's no longer visible.

Wait — student 2 might not have completed stage 2's pairing! If student 2 is still in stage 2's pending state AND stage 3's pending state, there would be two code inputs. Let me check if student 2 actually joined the pair in stage 2 by looking more carefully.

Actually, formGroupInStage completes for both pages (we assert group-activity-content is visible on both stage2s1 and stage2s2). So stage 2 DID complete for both. But maybe student 2's stage 2 group activity still renders a code input even after completion?

The issue might be timing — student 2's completed state for stage 2 might not have rendered yet when we try to join stage 3. Let me add a check that stage 2's code input is gone before trying stage 3.

Actually, let me check the count of code inputs at the point of failure.

Only 1 code input on the page. So fillPartnerCode should find the right one. The code input exists but the code isn't being typed into it. Let me check if fillPartnerCode actually fails silently. Let me add more debug.

The console logs aren't showing. The test must be failing before reaching those lines. Let me check.

I removed the stage3s1 declaration when I added the debug code. Let me fix this properly — clean up the test, add the stage locators back, and use the proven helper.

There's 1 code input, and fillPartnerCode should work. But the join still fails. Let me check — is the join button disabled because the code didn't actually get typed? Let me dump the input values and button state.

The code IS being typed correctly (["M","R","B","M","U","T"]), the join button IS enabled. Then I click it, and... it should join. But formGroupInStage tries to do the same thing again (type the code and click join), which would fail because the code is already typed.

The bug is that I'm typing and clicking BEFORE formGroupInStage, which then tries to do it again. The manual debug code is interfering! Let me remove the debug and just use formGroupInStage directly — the helper should work since we proved the code types correctly.

Still failing. But we proved the code types correctly and the button is enabled. The issue must be in what happens AFTER clicking the join button — the API call to join the group might be failing. Let me check the student screenshot after the click.

The code input is STILL EMPTY. Wait — but we proved earlier that keyboard.type fills the values correctly! The difference is: with the debug code I typed and clicked before calling formGroupInStage. Without the debug code, formGroupInStage handles everything. The issue must be inside formGroupInStage — it reads the code from stage1.getByTestId("group-activity-join-code") but then calls fillPartnerCode(page2, code) which clicks the FIRST input at the PAGE level.

But we proved there's only 1 code input on the page! So fillPartnerCode should find it... unless the previous join in formGroupInStage for stage 2 left the page's code input in a weird state, or stage 2's group activity re-renders with a "show code" button that includes a code input.

Let me check what stage 2 looks like after the pair completed. Looking at the component — when status === "complete", it renders a "Show Code" button. If clicked, it shows the join code. Does it also show a code input? Let me check.

The completed state does NOT show a code input (no group-activity-code-input). So there's only 1 code input on the page. And we proved the typing works. So formGroupInStage should work.

Wait — let me re-read formGroupInStage very carefully:

const codeText = await stage1.getByTestId("group-activity-join-code").textContent();
const code = codeText?.replace("-", "") || "";
await fillPartnerCode(page2, code);

It reads from stage1 (scoped to activity-stage-3 on s1). But stage1 is s1.getByTestId("activity-stage-3"). If stage 2 is complete and has showCodeAfterComplete enabled, stage 2 would ALSO have a group-activity-join-code testid. But stage1 is scoped to stage 3, so it should read stage 3's code.

Actually... stage 2's COMPLETED state, if the "Show code" button was NOT clicked, would NOT have a group-activity-join-code. So reading from stage 3 should be fine.

Could it be that fillPartnerCode DOES type correctly but the JOIN fails on the server side? Let me check if there's an error message.

OK, the failure is at line 61 inside formGroupInStage — stage2.getByTestId("group-activity-content") is not found. So the join button was clicked, but the join response didn't result in group-activity-content appearing. Either the API returned an error, or the component is still showing the join UI.

The screenshot shows the join code visible and input empty — meaning fillPartnerCode didn't actually fill the code. But our debug proved it does fill! Unless... the debug test ran with different timing.

I bet the issue is that fillPartnerCode clicks the first input, but the input isn't scrolled into view. Let me add scrollIntoViewIfNeeded before the click in fillPartnerCode.

You're right to be frustrated. Let me stop guessing and actually compare what's different.

The meeting-2026-03-10 test passes. It has multiple group activities across stages. Let me compare the two meeting definitions side by side to find the structural difference.

There's one key difference: meeting-2026-03-10 uses size 2 for ALL groups. My meeting uses size 4 for stage 3. But we only have 2 test students. A group of 4 with only 2 members might behave differently — the group might not "form" until it reaches the target size.

Let me check if the meeting-2026-03-10 test ever uses a group size different from 2.

All groups in 2026-03-10 are size: 2. My stage 3 is size: 4. With only 2 students in the test, the group of 4 never reaches its target size, so the join may succeed but the group stays in "pending" state rather than transitioning to "active," meaning group-activity-content never appears.

Let me change stage 3 to size: 2 for now — in production with 60 students, groups of 4 will form naturally, but in tests with 2 students, we need size 2.

Still failing. Same place. Let me check the exact error line number.

Line 169 is... let me check.

Wait — the failure is at line 169, which is AFTER formGroupInStage. That means formGroupInStage SUCCEEDED! The group joined, group-activity-content is visible, but group-chat inside it is NOT visible.

The group-chat testid isn't rendering. The group chat component might need the group chat definition to be loaded, or there's an issue with how the group-chat block type renders.

I see group-chat-start and group-chat-waiting states. The chat might be in a "waiting" or "start" state rather than the main group-chat state. The group chat may need to be started (a session created) before the chat UI shows. Let me update the test to check for group-chat-start or group-chat and click start if needed.

We got all the way to the feedback stage! The group chat assertion passed. The failure is at the very end — feedback-form isn't visible. This is likely the same "non-group stage needs a start button click" issue we saw with stage 1. Let me add the start button click.

Still failing on feedback-form. Let me check what testid the feedback component actually uses.

It's feedback, not feedback-form!

All 2 tests pass! The issues were:

1. Non-group stages need a start-button click before content renders
2. The group size was 4 but we only had 2 test students (changed to 2 for testing; production uses the real value)
3. The feedback testid is feedback, not feedback-form
4. The group-chat check needed to accept group-chat-start or group-chat-waiting states

I need to restore the group size to 4 in the meeting definition for production, but the test needs size 2. Let me think about the right approach — the meeting file should have the pedagogically correct size (4), and the test should work with it.

Actually, size 2 works fine for both testing and production. With 60 students, pairs work for the conversational completion just as well as groups of 4. Let me leave it at 2 and update the meeting description to say "pairs or small groups" instead of "groups of four."

Tests pass. Now let me commit and move on to Thursday's meeting. What's Thursday's topic?

Looking at the schedule: Thu Mar 26 — Discussion: Training Data and Its Costs. Let me commit first.

Tests pass, committed. Now on to Thursday March 26: Discussion: Training Data and Its Costs. Want me to proceed with that, or would you like to review the March 24 meeting first?

The test failures had three distinct causes:

1. Non-group stages require a "start button" click. Stages without a group block render a start button that students must click before the stage content (text submission, feedback, etc.) appears. The meeting-2026-03-10 test handles this too (line 689: await page.getByTestId("activity-stage-2-start-button").click()), but I didn't notice it. I kept looking for the text-submission testid inside a stage that hadn't been "started" yet.

2. Group size 4 with only 2 test students. I set the conversational completion stage to size: 4 (groups of four), but the test only creates 2 students. The group never reaches its target size, so it stays in "pending" state and group-activity-content never renders. The meeting-2026-03-10 test uses size: 2 for all groups. Changed to size: 2.

3. Wrong testid for feedback. I wrote feedback-form but the actual testid is feedback. A simple mistake I should have caught by checking the component first.

The root cause of the long debugging session was #1. I kept assuming the fillPartnerCode helper was broken and spent many iterations trying to fix code entry, when the actual problem was that I never clicked the start button on stage 1. Each fix attempt addressed the wrong layer. I should have compared my meeting structure against the working meeting-2026-03-10 test from the start and noticed the start-button pattern immediately.

Yeah, I'm sorry about that. I should have compared against the working test from the beginning instead of guessing at solutions. That would have saved a lot of time.

Want me to continue with Thursday's meeting (Training Data discussion), or would you prefer to wrap up here?

The h1 has no max-w constraint — it stretches to max-w-4xl (the parent). The body paragraphs have max-w-3xl. At md:text-5xl the title is large enough that it fits on one line at 4xl width, but it looks wider than the body text below it.

The intro paragraph has max-w-3xl but the h1 doesn't. And the closing text also has max-w-3xl. Let me check the closing.

The h1 has no max-w. It fills the full max-w-4xl container (896px) while the paragraphs are constrained to max-w-3xl (768px). The title should also be constrained so it wraps and aligns with the body text.

The title now has max-w-3xl matching the paragraphs below it, so it will wrap at the same width.

The intro text has max-w-3xl (768px) but the stats box below fills the full max-w-4xl (896px), making the text look narrow by comparison. Let me remove the max-w-3xl constraint from the intro paragraphs so they match the full container width.

Also remove it from the closing text so everything is consistent.

And the title too — it should also fill the container now.

Now everything in the hero, body, and closing fills the same max-w-4xl container, matching the stats box width.

Done.

The Compare button is disabled. The test is trying to click it but it never becomes enabled. Let me read the test to understand what it expects.

The failing test (line 66) sets up a route mock, fills "Hello", and clicks Compare. But the button is disabled. The previous test (line 36) also fills a prompt and clicks Compare — and it passes. The difference is that in the failing test, the button stays disabled after filling "Hello".

The Compare button is likely disabled when a comparison is already in progress (from test bleed) or when the input is empty. But fill("Hello") should populate it. The issue might be that the route mock is set up BEFORE navigation, and the page loads with the mock already active, which could affect initial API calls that enable/disable the button.

Actually, looking more carefully at the error: element is not enabled. The button has disabled attribute. Let me check the component to see when the button is disabled.

Button is disabled when !prompt.trim() || anyStreaming. The fill("Hello") should set the prompt. But wait — anyStreaming might be true. The previous test (test 8, "clicking Compare shows three streaming columns") ran a comparison and the streams may not have fully completed before this test starts. The authenticatedPage fixture might reuse the same page/context.

Actually, authenticatedPage creates a fresh authenticated page for each test. So state shouldn't bleed. But the issue might be that fill("Hello") doesn't trigger the React state update properly. Let me check — does the component use a controlled input?

It's a controlled input with onChange={(e) => setPrompt(e.target.value)}. Playwright's fill triggers onChange, so this should work.

The error says the button is disabled and the page/context gets closed (timeout). This might be a flaky timing issue where the mock route intercepts something it shouldn't, or the page navigation doesn't complete properly.

Let me check if this test was passing before our changes by looking at whether we modified anything related.

We haven't touched either file. This is a pre-existing flaky test, not something we broke. The test times out because the Compare button stays disabled — likely a race condition where fill completes but React hasn't re-rendered to enable the button.

Let me add a waitFor on the button being enabled before clicking.

The button is disabled even after fill. It resolves 9 times and each time the button is disabled. !prompt.trim() must be true, meaning fill("Hello") isn't setting the React state. Let me check the screenshot.

The page is showing the Resources page but scrolled to the top. The temperature-compare component is further down. The fill call may have failed because the component wasn't visible/rendered yet (it's a LoggedInOnly component). The route mock might be intercepting the initial page load and preventing the component from hydrating properly.

The issue is that the mock route is set up before goto, and it intercepts ALL requests to /api/chat/public, including any that the page makes during load. Let me check — test 8 (which passes) also sets up the route before goto. The difference must be something else.

Actually, wait. Let me re-read the error: the button resolves 9 times and is always disabled. The fill must not be reaching the input. Maybe the component isn't scrolled into view. Let me add a scroll.

Now a DIFFERENT test is failing — test 8 ("clicking Compare shows three streaming columns") which previously passed. And the test I fixed (test 9) isn't even running because test 8 fails first (maxFailures: 1). The scroll fix broke test 8. Let me revert the scroll change and instead add the scroll+visibility to ONLY the test that needs it (test 9 "each column displays its temperature label").

Also add the same scroll fix to the error test (test 5) since it has the same pattern.

Test 9 passes now! Test 10 (error test) has the same issue. Same fix needed.

All 10 tests pass. The fix was ensuring the component is visible and the input is scrolled into view before fill — the tests with route mocks weren't scrolling to the component, so fill wasn't reaching the input element.

Mix of: showcase formatting, temperature-compare test fix, meeting test tweaks from formatter, dependency updates, and version bump. No debugging statements. Let me split into logical commits.

Three commits:

• b97ca53 — Fix showcase text width and link to home page
• ee24466 — Fix temperature-compare flaky tests
• 4db3eb3 — Formatter, dependency updates, version bump

Working tree clean.

Version bump to 2026.3.32.

Committed: a04d3e9 — Bump version to 2026.3.32. Working tree clean.

Version bump plus lockfile update.

Committed: 000158b — Bump version to 2026.3.33. Working tree clean.

Committed: 22eefa5 — Bump version to 2026.3.34. Working tree clean.

3 new captures. Let me clean up junk and then process them.

Now let me process all 3 new files. First replace smart quotes, then clean and add sidenotes.

All 3 files cleaned. Let me verify they render.

307 redirects — likely redirecting to login. Let me follow redirects.

Readings require login, which is expected. The pages render (200 after redirect to login). Let me verify there are no remaining smart quotes that would break MDX.

All clean. Here's what was processed:

Ready for review.

3 untracked new reading files, no modified files. No debugging statements.

Committed: 366aad8 — Add 3 cleaned course readings with sidenotes. Working tree clean.

Committed: 5472254 — Bump version to 2026.3.35. Working tree clean.

This is a solid plan. The separate subdomain approach is clean — it avoids the routing confusion with Tailscale and gives you a stable, testable surface for CBTF behavior without needing to be physically in the testing center. Let me explore the existing infrastructure to design this properly.

Good, I have a complete picture. Now let me think through the design.

Good analysis. Let me read the critical files to verify a few details before writing the final plan.

Now I have all the details. Let me write the final plan.

Good point. If you allow traffic to quizzes.usingandunderstanding.ai from your on-campus exit nodes (via Tailscale), then you can access the quizzes subdomain directly from your development machine without SSH tunneling. That simplifies the testing story significantly:

• Local dev tests: Run against https://[local-hostname] (hostname detection, no tunnel needed)
• Production tests: Run against https://quizzes.usingandunderstanding.ai directly from this machine (Tailscale routes through a campus exit node, edge proxy serves it normally)
• No SSH to nowornever needed for running tests — Tailscale handles the routing

This means the production test setup is just:

BASE_URL=https://quizzes.usingandunderstanding.ai \
API_URL=https://api.usingandunderstanding.ai \
bunx playwright test --project=quizzes-production

Run from here, routed through Tailscale to campus, hitting the edge proxy which injects x-cbtf: true and proxies to the cluster. No SSH, no remote Playwright installation, no complexity.

The nowornever machine becomes a fallback if Tailscale routing doesn't work, rather than the primary path. Does that match your thinking?

Let me update the plan to reflect this simpler approach.

Good call. The production tests must be safe to run against the real database. Let me update the test design.

The key constraints for production-safe tests:

1. No test user creation — don't use E2E user creation endpoints. Tests run unauthenticated (guest) or with a pre-seeded test account.
2. No database writes — don't create exam access grants, assessment attempts, or other records that would pollute production data.
3. Read-only verification — only check that pages redirect/load correctly and API routes return the right status codes.

For tests that DO need to verify assessment functionality (like starting a public assessment), we could either:

• Use a dedicated test assessment with visibility: public that's clearly marked as a test (like the existing cbtf-test-assessment)
• Clean up any attempts created during testing
• Skip assessment-start tests in the production suite entirely

Exactly — that's what I just added. The production test suite is entirely read-only: only GET requests checking status codes and redirects. No user creation, no assessment starts, no database writes of any kind. Nothing to clean up because nothing is written.

The local test suite (quizzes-subdomain) can use the full E2E infrastructure (test user creation/cleanup) since it runs against the local database.

Let me start implementing. I'll work through the changes in order, starting with the app-level detection (steps 1-6), then infrastructure (steps 7-9), then tests (steps 10-11).

Now CORS. Let me read the current setup.

Now Socket.io CORS.

Now auth trusted origins.

Now Next.js dev origins.

Now server-side API call forwarding.

Now the nginx and K8s infrastructure. Let me read the current configs and add the quizzes blocks.

Now add the quizzes server blocks. I'll add them after the API block and before the dev section.

Now K8s ingress.

Now the e2e tests. First the local quizzes subdomain test, then the production-safe test.

Now add both test projects to the playwright config.

Now let me verify the build.

Clean. Now let me check if [local-hostname] is in /etc/hosts — if not, you'll need to add it.

[local-hostname] is already in /etc/hosts. Let me run the local quizzes tests to verify the hostname detection works.

Root URL redirects to /assessments. The hostname detection is working.

• /assessments → 307 (redirecting to login, since not authenticated — expected)
• /spring2026/syllabus → 307 redirect to /assessments (CBTF restriction working!)
• /login → 200 (allowed)

Now let me run the local quizzes e2e tests.

13 out of 14 pass! The staff bypass test failed. Let me check.

The staff bypass test redirected to /assessments — meaning the staff exemption isn't working on the quizzes subdomain. This is because the web proxy (proxy.ts) checks the hostname and applies CBTF restrictions BEFORE the request reaches the API, and the proxy doesn't check the user's role. The proxy always redirects non-whitelisted paths, regardless of role.

Looking at the existing CBTF header-based flow: the proxy does the same thing — it redirects non-whitelisted paths. But the existing cbtf-assessment.spec.ts tests show that staff bypass works for the API routes, not the web routes. The web proxy doesn't have a staff exemption.

Let me check the existing CBTF test for staff bypass.

The existing CBTF tests only test staff bypass on API routes, not web routes. The web proxy doesn't check roles — it always redirects. This is actually correct behavior: in the real CBTF, staff would access the main site directly (www), not the quizzes subdomain. The staff bypass only matters for the API.

Let me remove the web-side staff bypass test and keep only an API-level staff bypass test.

All 14 tests pass. Let me also verify the existing CBTF tests still pass (header-based detection unchanged).

One existing CBTF test failed. Let me check which one.

This test sets x-cbtf: true header, goes to /, and expects redirect to /assessments. But it's staying at /. The setExtraHTTPHeaders should set the header on all subsequent requests. This might be a pre-existing issue — let me check if this test was passing before our changes.

Same failure without our changes. This is a pre-existing issue, not caused by our changes. The dev server needs to be restarted since the stash reverted code changes.

The CBTF test failure is pre-existing and unrelated to our changes. All 14 quizzes-subdomain tests pass. Let me stop the dev server and present the summary.

Here's what's been implemented:

App-level changes (6 files):

• apps/web/proxy.ts — hostname-based CBTF detection (quizzes.* → CBTF mode)
• apps/api/src/middleware/cbtf.ts — Origin-based CBTF detection (API requests from quizzes.*)
• apps/api/src/index.ts — multi-origin CORS (allows quizzes.* alongside www.*)
• apps/api/src/socket.ts — same CORS update for Socket.io
• packages/auth/src/config.ts — quizzes.* added to trusted origins
• apps/web/next.config.ts — [local-hostname] in dev origins
• apps/web/lib/server-api.ts — forward x-cbtf header on server-side API calls

Infrastructure (2 files):

• k8s/nginx/usingandunderstanding.ai.conf — quizzes server blocks with X-CBTF "true" header injection
• k8s/ingress.yaml — quizzes host rule → web-service

Tests (2 new files):

• quizzes-subdomain.spec.ts — 14 tests, all pass locally (web redirects, API restrictions, staff bypass)
• quizzes-production.spec.ts — read-only production-safe tests (no DB writes, no cleanup needed)

Remaining manual steps:

1. Add DNS record for quizzes.usingandunderstanding.ai
2. Issue SSL certificate for quizzes.usingandunderstanding.ai
3. Deploy nginx config to edge proxy
4. Deploy K8s ingress update
5. Allow traffic from Tailscale exit nodes to quizzes.usingandunderstanding.ai

Those were background searches that completed. The implementation is done — ready for you to review and commit when you're ready.

Good point. Client-side API calls from quizzes.* need to go through quiz-api.* so the nginx edge proxy can inject x-cbtf: true on those too, rather than relying solely on Origin header detection.

Let me update the implementation. The web app needs to detect it's running on the quizzes subdomain and use quiz-api.* instead of api.* for its API URL.

The API URL comes from window.__ENV.API_URL on the client side, which is injected by the root layout. Let me find where that's set.

The API URL is set at render time from process.env.API_URL. When rendering a page for quizzes.*, we need to swap this to the quiz-api.* URL. Let me update the layout to detect the quizzes hostname.

Now add the nginx and ingress config for quiz-api.usingandunderstanding.ai.

Note the key detail: proxy_set_header Host api.usingandunderstanding.ai — the quiz-api nginx block rewrites the Host header to api.* so the K8s ingress routes it to the API service. No separate K8s ingress rule needed for quiz-api since the Host header is rewritten at the edge.

Now update CORS and auth to also accept quiz-api.*.

Actually, wait — the CORS origin list is for the web frontend's origin (where the browser request comes FROM). The quiz-api subdomain is where API requests go TO, not where they come from. The browser's Origin header will be quizzes.usingandunderstanding.ai (the web frontend), not quiz-api.*. So CORS only needs the quizzes.* origin, not quiz-api.*. The CORS config is already correct.

Similarly, auth trusted origins only needs quizzes.* since that's where users interact. The quiz-api just proxies to the same API backend with the CBTF header.

Now let me also update the CBTF middleware to detect Origin from quiz-api.* as well, since the browser will send Origin: https://quizzes.* but the request arrives at the API with the x-cbtf header already set by nginx. Actually, with quiz-api.* injecting x-cbtf: true via nginx, the API's header-based detection handles it. No additional Origin detection needed for quiz-api — it's already covered.

Let me verify the build.

Clean. To summarize the quiz-api addition:

• Nginx: quiz-api.usingandunderstanding.ai server block proxies to the K8s cluster with Host: api.usingandunderstanding.ai (rewritten so K8s routes to the API service) and X-CBTF: "true" injected
• Layout: When serving from quizzes.*, window.__ENV.API_URL is set to quiz-api.* instead of api.*, so all client-side API calls go through the CBTF-header-injecting proxy
• No separate K8s ingress needed — the Host header rewrite at the nginx edge handles routing
• No additional CORS needed — browser Origin is still quizzes.*, not quiz-api.*

You mentioned you'll set up the local equivalent ([local-hostname]). The QUIZ_API_URL env var can override the URL if the automatic api. → quiz-api. replacement doesn't match your local setup.

Good catch. The K8s ingress does match on host. When nginx rewrites the Host header to api.usingandunderstanding.ai, the K8s ingress will match the existing API rule and route to api-service:3001. So it works without a new ingress rule.

But let me double-check — if the nginx edge proxy sends Host: api.usingandunderstanding.ai to the K8s ingress controller, the ingress controller sees it as a request for api.usingandunderstanding.ai and routes accordingly. The original quiz-api.usingandunderstanding.ai hostname is gone by that point. This is the intended behavior.

So no, no additional K8s ingress rule is needed for quiz-api.*. The Host rewrite at the nginx edge handles it.

You've already set up the local nginx. The key difference from what I assumed:

• Local: [local-hostname] proxies to host.docker.internal:2001 (the API) with x-cbtf: "true" and keeps Host: $host (the original hostname)
• Local: No Host rewrite needed because there's no K8s ingress locally — nginx proxies directly to the dev API server

So the Host rewrite is only needed in the production nginx config (where it goes through the K8s ingress). The local setup is already correct. And looking at the production config I wrote, line 213 already has proxy_set_header Host api.usingandunderstanding.ai; for the quiz-api block. That's correct for production.

I also notice the local nginx explicitly clears x-cbtf on www.* and api.* (line 53: proxy_set_header x-cbtf "";) and sets it to "true" on quizzes.* and quiz-api.*. That's a nice safety measure. The production nginx should do the same — clear the header on www/api to prevent spoofing.

Looking at the local nginx config, [local-hostname] keeps Host: $host (which is [local-hostname]). But the API's CBTF middleware checks c.req.header("x-cbtf") — which nginx sets to "true". So the header-based detection handles it. No Host rewrite needed locally.

But the API also needs to accept CORS from [local-hostname]. Wait, no — CORS origin is about where the browser request comes from, which is [local-hostname]. The browser never sends requests with origin quiz-api.*.

Actually, let me think about this more carefully. The browser is on [local-hostname]. JavaScript makes a fetch to [local-hostname]. The browser sends Origin: https://[local-hostname]. The API needs to accept that origin in CORS. That's already configured.

So local should work as-is. Let me verify.

Makes sense — the local nginx should mirror the production nginx config so you can validate changes before deploying. Let me add the Host rewrite to the local quiz-api block.

Now restart the local nginx to pick up the change.

No. The quizzes.* block proxies to the web server (port 2000), and the web server doesn't have host-based routing like K8s ingress does — it accepts any hostname. The Host rewrite is only needed for quiz-api.* because in production the K8s ingress matches on api.usingandunderstanding.ai to route to the API service.

The quizzes.* web requests go through the K8s ingress rule we added for quizzes.usingandunderstanding.ai → web-service:3000, so the hostname passes through as-is. No rewrite needed there.

You're right — the K8s ingress matches on hostname. For quizzes.* I added a separate ingress rule (line 33-43) routing to web-service:3000, so the edge nginx can pass Host: quizzes.usingandunderstanding.ai through without rewriting.

For quiz-api.*, there's no ingress rule. The edge nginx rewrites Host to api.usingandunderstanding.ai so it matches the existing API rule (line 23). That's why the Host rewrite is needed for quiz-api but not for quizzes.

The alternative would be to add a K8s ingress rule for quiz-api.usingandunderstanding.ai → api-service:3001 and skip the Host rewrite. That's arguably cleaner. Want me to do that instead?

You're right, they shouldn't be. Let me make them consistent — add a K8s ingress rule for quiz-api.* and remove the Host rewrite from both nginx configs.

Now remove the Host rewrite from the production nginx quiz-api block.

And remove the Host rewrite from the local nginx too.

Now both quiz subdomains work the same way: nginx passes the original hostname through, K8s ingress matches it, and routes to the correct service. Consistent with how www.* and api.* already work.