I'll start by reading the key reference files to understand the existing patterns before implementing.

Let me read the reference files in parallel.

Now let me also look at the actual meeting page that this test pattern is based on, to understand the exact GroupActivity-inside-ActivityStage pattern.

Now let me read the actual meeting file to see how GroupActivity is nested inside individual stages.

Now I have a clear picture of the pattern. Let me also quickly check the auth fixture to understand the test user API.

Good, I have all the context I need. Let me now create all three files. I'll start with the test component page and the Playwright config update in parallel.

Now let me create the E2E test file.

Now let me verify the dev server is running, then run TypeScript check and E2E tests.

Dev server is running. Let me run TypeScript check and the E2E tests.

TypeScript passes. Now run the E2E tests.

The test is timing out at 30s because this is a long integration test. Let me check the screenshots and also increase the timeout for this test. The main flow test needs more time since it goes through all 4 stages with group formation.

The screenshots show the test is actually working correctly - both students have formed groups, see their role content, and have completed stage 0. The issue is just a timeout: the test is too long for the default 30s limit. The "Target page, context or browser has been closed" error happens because the test fixture tears down after the 30s timeout.

Looking at screenshot 1 (instructor view), it shows "Stage 1 of 4" with "Completed" status and "0/2 completions" visible, while screenshots 2 and 3 show both students already completed ("Completed — Waiting for instructor..."). The test logic works but the group formation + 4 stages just takes longer than 30s.

I need to increase the test timeout for the full flow test. Let me check how the full-activity-flow test handles this.

I see the pattern — test.setTimeout(60000) is used. The full flow test with 4 stages and two group formations needs at least 60s. Let me also check the existing full-activity-flow test timeout situation — it has 3 stages with one group formation and it runs within 30s apparently. My test has 4 stages with two separate group formations, so it needs more time.

Now let me re-run the tests.

Still failing at the same line even with 90s timeout. The issue isn't timeout — it's that the complete button is never appearing inside the group activity content. Let me look at the screenshots more carefully and understand the issue. The complete button is part of the ActivityStage component, but when GroupActivity wraps the content, the button might be nested differently.

Interesting — the screenshots show that both students have already completed stage 0 ("Completed — Waiting for instructor..."), and the instructor shows "1-2B / 2 completions". The test is already past the group formation and completion, but it's stuck waiting for activity-stage-0-complete-button which is already gone (replaced by "Completed" state).

This means the test passed through the role verification and completion on the previous run's state, but is now hitting stale state from the prior run. The real issue is that the test is getting stuck in an infinite wait because the complete button already got clicked but the test code is somehow re-running or the state is carried over.

Wait — looking more carefully at the error: "Target page, context or browser has been closed" means the test's browser contexts were cleaned up by a timeout. But the screenshots show already-completed states. This suggests the group formation succeeded and the students completed, but the instructor's view on screenshot 1 shows "1-2B / 2 completions" which seems odd.

Let me look at the actual problem more carefully. The test tries to click the complete button at line 119, but by the time of failure, the pages show "Completed". This means the prior test run left state behind and the test is running against stale session data. The resetSessionIfExists should handle this, but maybe there's a race. Let me check if the issue is that the formGroup within stage 0 is working but the complete button isn't found within the stage's group-activity-content boundary.

Let me look at how the ActivityStage complete button relates to nested GroupActivity.

So the complete button is at the stage level, outside the group-activity-content. The locator page1.getByTestId("activity-stage-0-complete-button") should find it correctly. The screenshots show the students already completed, meaning the prior test run's state wasn't cleaned up, or the complete button was clicked by some prior interaction.

Wait — looking at the screenshots again more carefully: they show "Completed — Waiting for instructor..." which means the students DID complete. But the error says the test timed out at 90s waiting for the complete button to click. This is contradictory unless the state is from a previous run.

The real issue could be that when GroupActivity is inside the stage, the stage doesn't show the complete button until the group is formed. Let me check if the button is conditionally hidden when group-activity is present but not yet joined. But the screenshots show groups are formed and content is visible...

Actually, re-reading the error more carefully: "Target page, context or browser has been closed". This means the 90s timeout expired, and Playwright cleaned up the browser contexts. The screenshots were taken AT timeout time, and by that point the test had been waiting for 90 seconds. But the students show "Completed" — that's from the PREVIOUS test run that also failed.

The real question is: why does activity-stage-0-complete-button never appear? Let me check if the complete button rendering depends on group membership or some other condition when GroupActivity is nested inside.

The complete button should appear as long as sessionExists is true, isAdmin is false, and the stage isn't completed. Let me look at the visibility logic — maybe the stage itself isn't visible. The student needs to see stage 0, and the session needs to exist. Let me check if the stage visibility is the issue — perhaps when GroupActivity is inside the stage, the stage renders but the content (including the complete button) is hidden behind the group join UI.

The complete button rendering looks correct — it depends on !isAdmin && sessionExists and !completed. Looking at the screenshots, the students show "Completed — Waiting for instructor..." which means completed is true. This is residual state from the previous failed test run. The resetSessionIfExists only resets the instructor's session, but the group activity memberships and completion states might persist.

The key issue is: the test is hitting already-completed state from the previous run. When the session is reset and restarted, the students' completion state for stage 0 might still be cached or the students' pages haven't refreshed to see the new session.

But wait — looking at the full-activity-flow test, it does the exact same pattern and works. The difference is that in full-activity-flow, GroupActivity wraps ALL stages (outside the ActivityStages), so group formation happens once. In the mixed-stages test, GroupActivity is INSIDE stage 0, so the student needs to:

1. See stage 0
2. See the GroupActivity join UI inside stage 0
3. Form a group
4. Then see the complete button

The issue might be that after joining the group, the page needs to reload/re-render, and the complete button takes time to appear. But the screenshots show the button was already clicked (completed state). So the state is stale.

Let me check if the issue is the fillPartnerCode function when the code input is scoped inside the stage. The test currently uses the global page2.getByTestId("group-activity-join-button") which might find the wrong element if there are multiple group activities rendered. But for students, only stage 0 should be visible...

Actually wait — I think I see the issue. Let me re-read the test flow. The students goto the page, and they see stage 0 with a GroupActivity inside it. But the GroupActivity join UI is shown. The student pages would need to see both the stage content AND the group join UI. However, the join code text that the test reads is scoped to page1.getByTestId("activity-stage-0").getByTestId("group-activity-join-code") — but the group-activity-join-code might be rendered before the activity-stage-0 is visible if the session hasn't started yet for the student.

Let me look at another possibility: when GroupActivity is nested inside a stage, does the student even see the stage content BEFORE the instructor starts the session? In the full-activity-flow test, the GroupActivity wraps everything, so students see the join UI regardless of session state. But here, the GroupActivity is inside stage 0, and stage 0's visibility depends on isVisibleToStudent = unlocked || (index > 0 && canShowNextStage(index - 1)). For index 0, isVisibleToStudent = unlocked. unlocked = isStageUnlocked(0) which depends on the session being started.

So the flow should be:

1. Instructor starts session → stage 0 is unlocked
2. Students see stage 0 → which contains GroupActivity join UI
3. Students form group → see content + complete button

This is what the test does. But why does it time out? Let me add some debug visibility. Actually, let me just try running the test in a way that shows what's happening. Let me first make sure the session is fully cleaned up by navigating students to the page AFTER the session reset.

Actually, looking at the screenshots again — the students show "Completed — Waiting for instructor..." — this is state from a PREVIOUS run that wasn't cleaned up. The issue is that the resetSessionIfExists resets the activity session, but the student's page still shows the old completed state until they reload. The students navigate to the page AFTER the instructor starts a new session, so they should see fresh state.

Unless... the completion state is stored per-user and persists across sessions. Let me check.

Completion state cascades on session delete, so it's properly cleaned up. The screenshots showing "Completed" are from the running test, meaning the students actually completed successfully on a previous attempt and then the page state was captured at timeout.

Since the test does get to line 119 and then hangs, the activity-stage-0-complete-button must not be visible. Let me think about what's different from the full-activity-flow test...

In the full-activity-flow test, GroupActivity wraps the entire ActivityStages. The flow is:

1. Students go to page → see GroupActivity join UI (outside stages)
2. Form group → group-activity-content appears with the stages inside
3. Session starts → stages become visible → complete button appears

In the mixed-stages test, the GroupActivity is INSIDE stage 0. The flow is:

1. Instructor starts session
2. Students go to page → stage 0 is visible (unlocked) → GroupActivity join UI inside stage 0
3. Students form group → group-activity-content appears inside stage 0
4. Complete button should be visible at the stage level

The complete button is at the stage level (outside group-activity-content), so it should be visible regardless of group formation status. But wait — maybe the issue is that the student sees the complete button BEFORE forming the group, clicks it, and completes the stage without ever seeing the group content. That would be a bug in the component, not the test. But the test fails because it can't find the button...

Hmm, unless the complete button is somehow hidden when the student hasn't formed a group yet. Let me check if there's any logic that hides the complete button when a GroupActivity child hasn't been joined yet.

Actually, let me just add some logging/debugging by checking what the student page looks like when it gets stuck. Let me try a simpler approach: add an explicit wait for the stage to be visible before trying to click the complete button.

Wait — I just realized the problem might be simpler. Let me re-read my test code around lines 80-96:

const code1 = (
  await page1
    .getByTestId("activity-stage-0")
    .getByTestId("group-activity-join-code")
    .textContent()
)?.replace("-", "");
await fillPartnerCode(page2, code1 || "");

The fillPartnerCode function uses page.getByTestId("group-activity-code-input") — this is scoped to the whole PAGE, not to stage 0. If there are multiple group activities rendered (e.g., if the instructor sees all stages including stage 3 which also has a GroupActivity), there could be a conflict. But students only see stage 0, so there should be only one group-activity-code-input on the page.

Let me try a different approach — let me just run the simpler tests first to see if the basic structure works.

The instructor test passes. Now let me try the individual stages test.

The -g filter still matches the full flow test since "individual stages" appears in its name. Let me run only the second test.

It's running the first test again because of the maxFailures=1 setting. The first test always runs first (it matches the grep too since the full name includes "individual stages"). Let me focus on debugging the first test. The problem is clear: the activity-stage-0-complete-button never appears on page1 even though the group forms successfully.

Let me look at what happens with the group-activity component when it's nested inside an ActivityStage. The group-activity component has its own visibility logic — it might be hiding the stage's children (and thus the complete button) until the group is formed. But the complete button is OUTSIDE the group-activity — it's at the ActivityStage level.

Actually wait — I need to re-read the page.tsx structure. In the test page, the complete button is rendered by ActivityStageClient OUTSIDE the children. The children include the GroupActivity. So the complete button should be separate from the GroupActivity.

Let me check if maybe the issue is that the group-activity component is somehow blocking the rendering of the parent component. Let me look at the GroupActivity component to see if it wraps content differently when not joined.

Now I see the issue. When the GroupActivity status is "pending" (group not formed), it renders the join UI (lines 524+) and does NOT render the {children}. When status is "complete" (group formed), it renders the content (line 517).

But the key insight is: the GroupActivity component renders its own div wrapper with the join UI. It does NOT render the children until the group is formed. This is fine because the children (role content, shared content) are inside the GroupActivity.

However, the activity-stage-0-complete-button is OUTSIDE the GroupActivity — it's rendered by ActivityStageClient. The issue is that the complete button IS visible even before the group is formed. So the test should be able to click it.

Unless... the ActivityStage shows the complete button, but the student clicks it BEFORE forming the group (since the button is visible but the test hasn't gotten to that code yet). No, the test code explicitly forms the group first, then tries to click the complete button.

Let me add a toBeVisible wait before clicking the complete button, and also add some debug output. But first, let me check if there's a timing issue — maybe the fillPartnerCode and join button click don't actually complete the group formation before we try to click complete.

Let me look at the exact test flow more carefully:

// Lines 80-96: Form group
const code1 = (await page1.getByTestId("activity-stage-0").getByTestId("group-activity-join-code").textContent())?.replace("-", "");
await fillPartnerCode(page2, code1 || "");
await expect(page2.getByTestId("group-activity-join-button")).toBeEnabled();
await page2.getByTestId("group-activity-join-button").click();

// Lines 98-103: Wait for group content
await expect(page1.getByTestId("activity-stage-0").getByTestId("group-activity-content")).toBeVisible({ timeout: 10000 });
await expect(page2.getByTestId("activity-stage-0").getByTestId("group-activity-content")).toBeVisible({ timeout: 10000 });

After group formation succeeds, we verify role content and then try to click the complete button. The complete button should already be there. Let me add an explicit wait before clicking.

Actually, wait — what if fillPartnerCode is typing in the WRONG input? When page2 goes to the page and sees stage 0 with GroupActivity join UI, fillPartnerCode uses page.getByTestId("group-activity-code-input") which finds the code input on the page. But what if the code input on page2 isn't the one in the join UI? Could there be a race condition where page2 types the code before the join UI is fully loaded?

Let me add more explicit waits and also check if the group join code input is visible first. Let me also add a page.waitForTimeout debug pause to capture the state. Actually, the better approach is to add await expect waits and see what's actually on the page.

Let me rewrite the first test to be more defensive about waiting and also add explicit visibility checks before the click:

Let me look closer at the screenshots from this last run — the students show "Completed — Waiting for instructor..." which means a previous run actually completed but the session wasn't reset between runs. Let me check if the resetSessionIfExists in my test is working properly. The issue might be that the previous failed test left a residual session AND the students already completed stage 0 in a previous run.

Actually, I think I finally understand — the screenshots show the state from a PREVIOUS test run. The students' pages were already showing "Completed" from the earlier run. When the new test starts, it creates NEW test users (different nonce), but if the student pages from THIS run never see the complete button, it must be because something earlier in the flow is hanging.

Let me check: does the test actually get past the group formation? The error says it times out at line 119 after 90 seconds. So it's spending 90 seconds trying to click activity-stage-0-complete-button. If the group formation succeeded (screenshots show it did), the complete button should be visible. But if it's already in "Completed" state... then completed is true and the complete button is replaced by the "Completed" text.

OH WAIT. I think I finally see the issue. The screenshots show "Completed" because the test from a PREVIOUS run formed a group and completed. But the NEW test creates new users with a new nonce. So the new users should have clean state. Unless... the old session wasn't reset and the new users somehow get the old session's completion state?

No — completions are per-user-per-session. New users wouldn't have completions.

Let me try a completely different approach: let me add a page.screenshot debugging step right before the click to see what's actually on the page.

Actually, that won't help much. Let me add a proper debug step - take a screenshot right before the failing line and also check if the button exists at all.

Now I got a clearer error: "element(s) not found" — the activity-stage-0-complete-button does not exist on the page. And it failed at 13s instead of 90s. Let me check the debug screenshots.

Now I can see the issue clearly. Both student pages show "Completed — Waiting for instructor..." at the bottom of stage 0. The stage is ALREADY completed. The complete button has already been replaced by the "Completed" text. This means the stage was completed before the test reached the "Complete stage 0" section.

This is happening because of stale state from a previous test run that used the same meetingSlug ("e2e-mixed-stages"). The resetSessionIfExists resets the session, but then immediately starts a new one. The students might be loading a page that still has completion records from a previous session of the same meeting slug.

Wait — but the test creates fresh users with a new nonce each run. Fresh users wouldn't have any prior completions. Unless... the completion state is being inherited from the session somehow.

Actually — I see it now! The completion state shown on the screenshot says "Completed — Waiting for instructor..." which is the STATE where completed is true. But these are BRAND NEW test users. How can they already be completed?

Unless the isStageComplete function checks something other than per-user completion records. Let me check.

isStageComplete checks userCompletions.has(stageIndex) which comes from data?.userCompletions. These are fetched per-user from the API. For brand new users, there should be no completions.

Unless the API endpoint for fetching session state returns the wrong data. Let me check what userCompletions returns.

I see — the initialSession is server-rendered and passed as fallbackData to SWR. If the server renders the page with an existing session where the student has completions, the client will show those initially. But these are new users...

Wait — I looked at this wrong. Let me reconsider. The debug screenshots show that BEFORE the test tries to click the complete button, the state is already "Completed". This means between the group formation step (which succeeded, as shown by "Group members: E2E Test User student2") and the complete button click, something else completed the stage.

Could it be that the autoAdvance feature or the GroupActivity joining triggers a completion? Let me check if joining a GroupActivity automatically marks the stage as complete.

There it is! Line 238: activityStages.completeStage(currentStageIndex). When a GroupActivity's status becomes "complete" (i.e., the group is formed), it automatically triggers completeStage on the current activity stage. This is the auto-completion behavior — forming a group automatically marks the stage as complete.

Let me see the full context of this logic:

That's the answer. When a GroupActivity is nested inside an ActivityStage and the group formation completes (status becomes "complete"), it automatically calls completeStage(currentStageIndex). This means forming the group automatically completes the stage — there's no need to manually click the "Mark Complete" button.

This is the intended behavior for the "Find a Partner" pattern: once students pair up, the stage is done. The test needs to account for this: after group formation in a paired stage, the stage is already completed — don't try to click a complete button that no longer exists.

Let me update the test to handle this correctly.

Now I understand the full picture. I need to rewrite the test to account for the auto-completion behavior:

1. Paired stages: Group formation auto-completes the stage. After forming the group, wait for activity-stage-N-completed instead of clicking the complete button.
2. Individual stages: No GroupActivity, so the complete button IS shown and must be clicked manually.

Progress! Stage 0 passed this time. Now the failure is at stage 3 — the second group formation. The group-activity-content within activity-stage-3 is not being found on page1. Let me check the screenshots.

Now I can see the problem clearly. Screenshot 3 shows page2 on "Paired Stage Four" with the "Find a Partner" UI, and at the bottom there's a red/orange warning: "You just worked with E2E Test User student1! Please find a different partner."

The GroupActivity component has a "previous partner" detection feature that prevents students from pairing with the same person in a subsequent group activity. Since student1 and student2 formed a group in stage 0 (group key e2e-mixed-group-1), when they try to form a group in stage 3 (group key e2e-mixed-group-2), the system tells student2 they can't pair with student1 again.

This is an intentional design feature — the meeting content says "Find a new partner" for stage 4. I need a third student for the second group pairing, or I need to understand how to work around this.

Let me check if the warning actually blocks group formation or just warns.

The prior partner warning has a "Join anyway" button (data-testid="group-activity-prior-partner-confirm-button"). But it's only shown when priorPartnerWarning.confirmed is true. Let me check how this works — it seems like a two-step confirm.

Now I understand the two-step flow for rank 1 (most recent partner):

1. Student enters partner's code → API returns requiresConfirmation: true → Warning shown, code cleared
2. Student re-enters the same code → confirmed becomes true → "Join anyway" button appears
3. Student clicks "Join anyway" → handleJoin(false, true) completes the join

For my test, the simplest approach is to use 3 students: student1 pairs with student2 in stage 0, then student1 pairs with a NEW student3 in stage 3 (no prior partner conflict). This matches the real-world usage pattern better too.

Alternatively, I could handle the two-step confirmation in the test. Let me use 3 students — it's cleaner and tests the intended "new partner" flow.

I need to add a third student for the stage 3 pairing. Student1 pairs with student2 in stage 0, then student1 pairs with student3 in stage 3. Student3 only needs to participate in stage 3.

Good progress — the stages 0-2 now pass. The issue at stage 3 is a "strict mode violation": page3 sees TWO group-activity-join-button elements — one in stage 0 and one in stage 3. This is because student3 just joined and can see both the old stage 0 (with an unjoined GroupActivity) and stage 3.

I need to scope the fillPartnerCode and join button interactions to within activity-stage-3. Let me fix the stage 3 group formation to be properly scoped.

The fillPartnerCode function uses page-level getByTestId("group-activity-code-input") which is also ambiguous when there are multiple GroupActivity instances. I need to scope the code input, join button click, etc. to within activity-stage-3. Let me update the code to use scoped locators.

All 8 tests pass. Let me also run the TypeScript check to make sure everything is clean.

TypeScript passes (cache hit since the web package files haven't changed — only the test files and playwright config were modified, and those aren't part of the web package's tsc scope).

All tasks are complete. Here's a summary of what was implemented:

Files created:

• apps/web/app/testing/components/mixed-stages/page.tsx — Test component with 4 stages: paired (group-1), individual, individual, paired (group-2)
• testing/e2e/tests/mixed-stages.spec.ts — 3 E2E tests covering the full flow

File modified:

• testing/e2e/playwright.config.ts — Added mixed-stages project entry

Key findings during implementation:

1. Auto-completion: When a GroupActivity is nested inside an ActivityStage, forming a group automatically calls completeStage() — so paired stages don't need a manual "Mark Complete" click
2. Prior partner detection: The GroupActivity component prevents students from re-pairing with the same partner in a different group key. The test uses 3 students (student1+student2 for stage 0, student1+student3 for stage 3) to avoid this
3. Scoped locators: When multiple GroupActivity instances exist on the page, locators for join buttons and code inputs must be scoped to the specific activity-stage-N container

Let me check the new files for any debugging statements that should be removed.

No debugging statements found. The untracked files are all intentional new files for the test. All changes form a single logical commit.

Committed as c247c78. Working tree is clean.

Let me start by reading the existing plan file and then exploring the codebase to understand the current state.

This is a completely different task. Let me explore the current homepage and the components that need to be showcased.

(no content)

Good exploration results. Let me read the key files directly to finalize my understanding before designing the plan.

Now let me launch a Plan agent to design the implementation approach.

Good comprehensive plan. Let me verify one critical detail — the Pattern A nesting in the 2026-01-27 meeting.

Confirmed — Pattern A (GroupActivity wrapping ActivityStages) is used in both scavenger hunt meetings. Now let me also quickly check the blog page card styling for reference.

I have all the information I need. Let me write the final plan.

Before finalizing, I have a few questions about the feature descriptions and scope:

Good feedback. Three feature cards for the capabilities, then a separate blog mention — perhaps a "From the Blog" section with the latest post or two. Let me also check if there's a way to detect GroupActivity presence inside each stage's children for the preview.

The ActivityStages component doesn't currently reference GroupActivity at all — it just indexes children generically. To detect whether a stage contains a GroupActivity, I'd need to inspect the children tree during metadata extraction. Let me check how FacilitationNotes detection works since it's the same pattern.

Good — the FacilitationNotes detection uses element.type === FacilitationNotes by importing the component and comparing identity. I can use the same pattern for GroupActivity detection: import GroupActivity, walk the stage's children tree (shallow — just direct children), and check if any is a GroupActivity. The rotateRoles prop on the ActivityStage already indicates role rotation, and detecting GroupActivity presence would indicate partner work.

Now let me also check how the blog data is accessible for showing recent posts on the homepage.

The blog uses getBlogPosts() which reads from the filesystem — it's a server-side function. Since the homepage is a client component, I can't call it directly there. The blog section would need to either be a separate server component or have the data passed down. Let me think about the cleanest approach.

The simplest option: since the blog is just a link and doesn't need dynamic data on the homepage, a static "From the Blog" link/mention beneath the feature cards works without any server data. Alternatively, I could refactor the homepage to have a server component wrapper with a client inner component. Let me update the plan with the user's feedback.

Now let me update the activity preview section to include partner/group detection.

The plan is ready. Let me finalize and exit plan mode.