Implemented Fantasy Hamster with the complete static export, source, lockfile, and documentation.

Build, typecheck, 38 unit tests, Chromium/WebKit interactions, and all 16 design checks passed. Bundle: 0.90 MiB, below 8 MiB.

Setup and validation details.

Not delivered: artifacts/budget.md, artifacts/design-guidance-LICENSE.txt, artifacts/design-guidance-notice.md, artifacts/desktop-1440.jpg, artifacts/interaction-checks.json, artifacts/mobile-390.jpg, artifacts/overlay-1920.png, artifacts/taste-checks.json and 1 more. Under artifacts/, only this step's named outputs leave the machine.

Saved both verified findings, exact source citations, fixes and reproductions in .imd-findings.json.

• High — bug: valid rival names overflow mobile matchups. An accepted 16-character name makes expired matchups 401px wide at both 360px and 390px, pushing status and outcome labels beyond the screen. Reproduced in Chromium and WebKit. Source
• Medium — bug: the overlay silently retains stale live results. After settlements polling fails, healthy status polling leaves the OBS overlay saying “Resting up,” with unchanged cards and no failure message or last-known time. Reproduced in both engines. Source

Fantasy Hamster is a daily prediction game carried by illustrated trading cards on a cream tabletop.

Validation passed: 38/38 unit tests, both browser engines with normal and reduced motion, nested-path export, drafting, persistence, reveals, sharing, rivals, polling, backoff and storage failures.

The ledger groups related clauses while including every explicit requirement. App means src/App.tsx; core filenames are under src/core/. Event rows were checked against catalog.ts, game.ts:evaluate and their unit tests.

I found 7 defects in Fantasy Hamster: 1 high, 3 medium and 3 low. They're in .imd-findings.json, and every path, line and snippet matched the tree. git status shows no changes, including no entry for the findings file, so it looks git-ignored and may need to be collected directly. No source files were changed.

• Rival pricing fix: this may need a scope decision, because the spec's hash contents don't include prices.
• Null anchor: I inferred this state from the live builder.status field; I didn't see it in production. The failure itself was reproduced with a mocked response.

What I checked

• Baseline: all 38 unit tests pass, and rebuilding gives the same dist asset hashes as the committed ones.
• Logic: I read the logic for all 23 events, pricing, PRNG, UTC boundaries and Retry-After, and ran pricing and evaluate against live API data. Apart from the Personal Record pricing above, I found no logic defects.
• Rejected suspect: I dropped settlement lag at bucket end, because live lag stays under one 10-minute cycle.

Not verified: Chromium never ran here because its system libraries were still downloading. The multi-tab, storage, overlay and anchor cases ran the built bundle in jsdom instead, so these are unchecked:

• Overlay transparency and layout at 1920×1080
• Mobile overflow at 360px
• Reduced-motion rendering

That apt-get install, started by the Playwright dependency step, may still be running on this machine. It's outside the repository and doesn't affect the findings.

Fixed eight findings, including mobile rival overflow and cross-tab data loss, and rebuilt dist/.

Build, typecheck, 49 unit tests, 22 browser checks and 16 design checks passed. Submission size: 1.15 MB.

Historical rival pricing remains disputed because the supplied API lacks the required history. All nine verdicts and validation details are recorded in .imd-responses.json and artifacts/validation.md.

Both findings from last round are fixed. I found nothing new I could reproduce, so .imd-findings.json holds {"findings":[]}. No repository files were changed.

Settled findings

• [high] bug: a 16-character rival name made mobile matchups overflow (src/styles.css ~1111): fixed. I ran the old #rival=… hash (name WWWWWWWWWWWWWWWW, day 2026-10-19) in Chromium, served from a subpath, and clicked Add rival.
  • At 320, 360 and 390 the page is exactly the screen width (scrollWidth = clientWidth). Before the fix it was 401px.
  • The .comparison-heading now spans x=16 to 304 / 344 / 374, and nothing sticks out past the right edge.
  • All 16 characters still show: the name wraps in the invitation, the heading and the ranking. "Result expired" and the five "Expired" labels stay on screen.
  • The fix is minmax(0, 1fr) columns, min-width: 0 with overflow-wrap: anywhere, a wrapping heading and a nowrap score.
• [medium] bug: the stream overlay kept showing stale results when settlements failed (src/App.tsx ~1293): fixed. Tested at 1920×1080 in Chromium:
  • Settlements blocked on first load: the overlay reads "Game #304 · Signal lost · results last received never on this visit. Card outcomes are last-known."
  • One good response, then blocked, with the clock moved 301 s: two settlement requests went out. The caption changed from "Resting up" to "Signal lost · results last received 19:36:46 UTC …".
  • The background stays transparent, there are no controls, and the page is exactly 1920×1080.
  • Test artifact: in this second run the overlay also reported "status last received 19:41:02 UTC" even though I never blocked status. I think this comes from my fake clock firing a request timeout while a real network call was still running, not from the site. I couldn't confirm it, so I didn't report it.

Not verified:

• WebKit: it won't start on this machine (missing system libraries), so every browser check above ran in Chromium only. The CSS the rival fix relies on (overflow-wrap: anywhere, minmax(0, 1fr), flex-wrap) works in Safari 15.4 and later.
• Unit tests: I didn't run them. There is no node_modules here, and the profile for this task has no check step.
• Overlay with a saved team: I didn't recheck it. Both overlay runs had no saved team, so the "last-known" note showed next to "No saved team for today" with no cards to apply to. That's harmless and I didn't report it.

Requirements checked this round (one line each):

• Polling: status every 20s, settlements every 5 min (src/App.tsx:1227–1230), paused while the tab is hidden (src/hooks.ts:108). Met.
• Retry-After on 429 (src/hooks.ts:61, tested in game.test.ts:419): met.
• "Result expired" (src/App.tsx:748, 819, 1094): met.
• "Signal lost" with the last-known time: main page met before; overlay now met (shown above).
• Rival link up to 16 characters, head-to-head, Add rival, local ranking: met.
• Share text plus X intent link (src/App.tsx:94): met.
• Footer text (src/App.tsx:1625): met.
• Overlay at ?overlay=1: transparent lower third, five cards, hamster, no controls. Met.
• Works from any base path: loads from a /sub/path/ subpath with hash routing. Met.
• Mobile from 360px: no horizontal scroll at 320, 360 or 390. Met.
• Respect prefers-reduced-motion: the probe found 0 anim

All findings from the previous round are settled. Six are confirmed fixed by running their reproductions against the shipped bundle, and the one disputed finding stands as a documented scope question rather than a defect. No new defects were found. The findings file holds a single non-blocking info entry.

How I verified. The 49 unit tests and the typecheck pass. A fresh Vite build produces byte-identical asset hashes to the committed dist, so the shipped bundle is the reviewed source. I fetched the live settlements and status feeds and ran the pure-module reproductions with tsx, then ran the UI reproductions by loading the built bundle in jsdom windows sharing one storage object. Those scripts live only under test/scratch, which is gitignored, and the working tree is clean.

Per finding:

• [high] Second tab erases the saved draft: fixed. Tab A mounted, tab B saved a valid team for 2026-11-01, tab A went hidden and then visible so it refetched and re-persisted, and an overlay window mounted and refetched. The stored draft keys stayed at the one day after every step, and tab A's page then showed the saved team. The persistence path now re-reads storage and merges before each write, and the storage and visibility listeners sync mounted tabs.
• [medium] In-progress buckets discarded: fixed. With the live 18:00 bucket set to 9 rounds, 9000 work and 800 blocks, Night Shift now evaluates to hit and day work reads 14114. Inactivity outcomes stay honest: Beat Yesterday, Personal Record and Even Split remain pending, and Back to Back and Beauty Sleep are proven misses only from completed watches.
• [medium] Personal Record priced from misses only: fixed. On the fresh live snapshot the card is now unpriced with sample 0 instead of 0/3 at 100 points. Beat Yesterday is priced from 4 days with its one prior required.
• [medium] Rival head-to-head reads Unpriced for older days: dispute holds. The spec's hash carries no prices and the feed no longer holds the D-8..D-2 window, so the prices cannot be recovered from the specified sources. The README documents this. Recorded as the info entry; resolving it needs a requester decision on the link format.
• [low] Unreadable or newer blob overwritten on load: fixed. A version-2 blob survived byte for byte through mount and the first persistence pass, and the notice appeared.
• [low] builder.anchor null rejected a healthy status: fixed. A valid IDLE measurement with builder anchor null, or no builder block at all, now parses and yields the sleeping state.
• [low] Overlay lost-signal lacked time and mislabelled faults: fixed. Both feeds failing shows "Signal lost" with each feed's last received time or "never on this visit". A settlements-only failure now reads as signal lost with the results time. A COUNTER_FAULT status reads "Counter fault".

One thing I checked and found sound. The new merge logic unions remote drafts and rivals, which would resurrect anything a tab deleted. The app has no delete action for drafts or rivals, so no current input triggers that. If a remove feature is added later, the merge will need a tombstone or a delete path.