It looks like captured articles don't have dates on them? Or the dates aren't...

I have enough context. Let me check one small thing — whether there's any existing client component that uses IntersectionObserver for a sticky pattern.

Implementation complete. bun run tsc, lint, and format all pass.

What changed:

• apps/api/src/services/html-extractor.ts — ArticleExtraction now includes publishedTime (normalized to YYYY-MM-DD via UTC).
• apps/api/src/services/mdx-generator.ts — emits date: "YYYY-MM-DD" when available.
• apps/web/lib/readings.ts — passes data.date through.
• apps/web/app/[semester]/readings/[slug]/page.tsx — "Published April 15, 2026" line under source/author, sentinel inside the header, <ReadingMetaBar> mounted at page root.
• apps/web/components/reading-meta-bar.tsx (new) — client component with IntersectionObserver; fades in a fixed bottom bar (title · author · date [Read on Source →]) once the header scrolls out of view. Hidden entirely if there's no sourceUrl.
• apps/api/src/scripts/backfill-capture-dates.ts + scripts/captures-backfill-dates.ts (new) — for each committed .mdx missing a date, look up the capture by sourceUrl, re-extract from stored HTML, inject date: "…" into the frontmatter (body preserved), and regenerate extractedMdx in the DB.
• package.json — added captures:backfill-dates.

Next, when you're ready:

1. bun run captures:backfill-dates prod — adds dates to existing readings.
2. git diff content/spring2026/readings/ — review the injected date: lines.
3. Visit a reading in the browser to confirm the date renders and the bottom bar fades in/out on scroll.

It does support local — I just defaulted to prod to match captures:pull. Three targets:

bun run captures:backfill-dates local   # uses local Docker postgres
bun run captures:backfill-dates dev     # port-forwards to K8s dev DB
bun run captures:backfill-dates prod    # port-forwards to K8s prod DB

For a local run, your local DB needs the page_captures rows. bun run db:sync syncs prod → local (excludes only documents/chunks, so captures come along). Then:

bun run db:sync               # if you haven't recently
bun run captures:backfill-dates local
git diff content/spring2026/readings/

The local target only modifies your local DB's extractedMdx column (discarded on next sync) and the local MDX files (which you can git checkout to revert). Nothing touches prod.

Want me to change the default from prod to local so a bare bun run captures:backfill-dates is the safe option?

Right — committing the dates to the MDX files makes the DB update pointless (captures:pull skips existing local files). I'll simplify: drop the wrapper script, drop the DB update, just write to local files using the local Docker postgres.

Done. Now bun run captures:backfill-dates runs against your local DB (which already has captures via db:sync), updates only the local MDX files, and stays out of prod entirely.

bun run db:sync                       # if your local is stale
bun run captures:backfill-dates       # adds date: lines to readings
git diff content/spring2026/readings/

Dates look sane. Quick review of 63 files:

• Recency distribution: most are Feb–Apr 2026 (matches the active capture window for spring '26); 4 readings dated 2026-04-15 are from yesterday — fits.
• No future dates, no 1970-01-01 epoch placeholders, no nulls.
• Older outliers all check out:
  • the-ecstasy-of-influence-harpers-77db.mdx → 2007-02-01 (Lethem's original Harper's essay) ✓
  • the-unpredictable-abilities-emerging-from-large-ai-models-… → 2023-03-16 (Quanta) ✓
  • ai-is-nothing-like-a-brain… → 2025-04-30 (older Quanta piece) ✓
  • opinion-i-teach-creative-writing… → 2025-07-18 ✓
  • the-ai-takeover-of-education-is-just-getting-started… → 2025-08-12 ✓
  • the-people-outsourcing-their-thinking-to-ai… → 2025-12-01 ✓

The ~8 readings not touched are presumably the hand-written ones (alphago, understanding-media-ch1, the *-podcast-guide files, etc.) plus any captures whose stored HTML lacked an article:published_time meta tag — bun run captures:backfill-dates prints miss: lines for the latter if you want to track them down.

This is unrelated to the date changes. Here's what's happening:

Why it's not from my change: chunkMdxContent (packages/rag/src/chunking.ts:268) doesn't strip frontmatter — it just splits on heading boundaries. Adding one line (date: "...") to the YAML block doesn't change the content shape; whatever previously embedded fine still embeds fine.

Why it's happening now: the rewrite changed every captured .mdx file's hash, so on dev startup ingestContent (apps/api/src/startup/ingest-content.ts:62-95) sees them all as changed/new and re-runs embeddings for ~63 documents at once. Most likely you tripped a transient Azure failure. Note the error path is "Failed to index file" (the new-document branch, line 95), not "Failed to re-index" — so for this specific file there was no prior documents row, presumably because db:sync excludes documents/chunks and your local copy had been emptied at some point.

The actual bug is in packages/llm/src/embeddings.ts:80-86: when Azure returns HTTP 200 with body literally null (which is what 'null is not an object' indicates — data itself is null, not data.data), the code dereferences data.data and throws. There's no defense against a null body.

Two ways to react:

1. Just retry — restart bun run dev and let it re-index. The single file that failed will get picked up next pass.
2. Harden the embeddings client — small fix to treat a null/missing-data response as a retryable failure, with the offending input length logged so you can see if a specific chunk is the trigger.

Want me to do (2)? It's a 5-line fix in embeddings.ts and would have caught this regardless of the trigger.

Typecheck passes. Now updating the bottom bar layout.

Now drop the unused props from the page.

Bottom bar now renders: Title (linked) (Source) — e.g., Claude Mythos Is Everyone's Problem (The Atlantic). Hidden when sourceUrl is absent.

Proposed commit plan (3 commits, all clean — no debug statements):

Commit 1: Add publication dates to captured readings pipeline + UI

• apps/api/src/services/html-extractor.ts — extract publishedTime, normalize to YYYY-MM-DD
• apps/api/src/services/mdx-generator.ts — emit date: in generated frontmatter
• apps/api/src/scripts/backfill-capture-dates.ts (new) — inject dates into existing readings
• apps/web/lib/readings.ts — pass date through the loader
• apps/web/app/[semester]/readings/[slug]/page.tsx — show date; mount bottom bar
• apps/web/components/reading-meta-bar.tsx (new) — sticky bottom bar with linked title
• package.json — captures:backfill-dates script

Commit 2: Backfill dates across 63 captured readings (pure content — the date: "..." injections)

Commit 3: Handle null body from embeddings API — packages/llm/src/embeddings.ts

Untracked files are the two new ones from this session (backfill-capture-dates.ts, reading-meta-bar.tsx) — they're part of commit 1.

Proceed, or want me to abort so you can stage manually?

All three commits landed, working tree clean:

• c0103f7 — pipeline + UI (7 files)
• 0612dbd — backfilled dates (63 readings)
• 6ed3ccf — embeddings null-body retry (1 file)

Done. Bottom bar now reads: April 15, 2026 · Title (Source) by Author. Date and trailing author/source are muted, title stays bold and linked.

Done. Bottom bar reads: April 15, 2026 · Title by Author in Source. Falls back gracefully if either is missing.

Single conceptual change across 2 files, no debug statements. Committing as one.

Committed e628820.

Heads up — git status --short now shows ~26 modified package.json files across workspaces. These appeared after the commit (probably a hook ran bun install or a workspace-sync), and they're unrelated to this change. Leaving them alone for you to inspect.

git diff packages/llm/package.json   # peek at one to see what changed

26 package.json files all bumped 2026.4.18 → 2026.4.19 (post-commit hook ran the version bump). One commit, no debug statements.

Committed d5f993a. Working tree clean.

Added the 5-minute feedback stage after Round 4 share-out in content/spring2026/meetings/2026-04-16-ai-safety.ts. Typecheck passes.

Different task from the previous plan — I'll evaluate fresh and overwrite the plan file. First let me understand the current deploy pipeline and how content is bundled.

Key finding from the exploration: content is bundled into .next/standalone at webpack build time — the web runtime never touches content/ on disk. So the rebuild is unavoidable as long as we want to keep the current architecture. Three realistic paths, each with a very different effort/speed tradeoff. Let me confirm direction before planning.

I'm still in plan mode from the previous /clear, and plan mode explicitly forbids commits. Let me show you what's pending (read-only) — you'll need to exit plan mode (or I can run ExitPlanMode with a no-op plan) before I can actually commit.

Correct — the change isn't live:

1. Not committed — it's just modified on your laptop (M content/spring2026/meetings/2026-04-16-ai-safety.ts).
2. Meetings are bundled at build time. Even if you committed and pushed right now, you'd need a full bun run deploy:prod (docker build + push + rollout — the slow path we were just talking about). Students currently in the activity would also need to reload.

Given that today's class is presumably happening now or very soon, the realistic options are:

• Skip the feedback stage for today. Commit it now so it's correct in git for the future, but don't deploy. The file change is cheap to keep around.
• Deploy anyway and ask students to refresh at the Round 4 share-out. Takes ~5–10 minutes for the build/push/rollout; risky if class is already past the share-out.
• Run feedback verbally. Ask the question out loud at the end.

Want me to just commit the file (no deploy) so it's preserved for next time you run this meeting?

Found the reason. Activity sessions snapshot the stage list at session start:

• apps/api/src/routes/admin/activity-stages.ts:80-102 inserts total_stages = stages.length on activity_sessions, plus one activity_stage_timings row per stage.
• apps/web/components/dashboard/stage-bar.tsx:75 reads status.totalStages from the DB, not the live meeting definition.

So your session has total_stages = 9 and 9 timing rows. The new 10th stage (Feedback) lives in the deployed code but has no DB backing, and "next stage" caps at index 8. Reloading only refreshes the client; the DB state is frozen.

Three options:

1. Patch the running session in the DB — UPDATE activity_sessions SET total_stages = 10 and INSERT INTO activity_stage_timings (stageIndex=9, label="Feedback", ...). Preserves current stage + all completions. ~30 seconds.
2. Reset and restart — loses current stage position and student completions. Only reasonable if class is basically over.
3. Run feedback verbally. Safest mid-class.

Want me to run the SQL patch? It'd need the session ID — quick query to find it.

Yeah, you're right — it's in CLAUDE.md:

Every activity meeting (anything with an activity.stages array) must end with a 5-minute feedback stage as its final stage. This applies to labs, exploratory meetings, and any discussion meeting that uses the activity-stages framework — no exceptions.

I had the rule in context and still missed it when this meeting was originally authored. My fault, not the instruction's.

Sounds good. The feedback stage is committed for next time, nothing more to do.

Let me re-enter planning for this and read the actual Dockerfiles + deploy script so the plan is concrete.

I have enough to design the plan. Different task from the previous plan file — I'll overwrite it.

Sounds good. I'll wait. Once you've committed the meeting file and cut the new branch, let me know and I'll exit plan mode and start on the Dockerfile + deploy changes.