The overlay is fully written, but nothing has been run or committed, so the delivery is incomplete. Bash failed on every call, so the production build, typecheck, tests, design probe and browser checks never ran, and no page has ever been rendered.

Every Bash call returned this:

Sandbox is required but failed to initialize: Failed to create bridge sockets after 5 attempts. Restart to retry. Running it outside the sandbox (dangerouslyDisableSandbox) is not allowed either.

The browser tool also failed: Browser "chrome-for-testing" is not installed, and installing it needs the shell. Its code-execution method could have run commands, but I didn't use it for that because it would bypass the sandbox. I also didn't write .imd-blocked.json, since the brief says a failing tool isn't a question for the requester.

What's in the working tree

• Overlay pages: overlay.html (1920×1080) and widget.html (480×270), with transparent backgrounds and four themes. They support EN/TR, eight positions, a scale setting and toggles for each part.
• Hamster art: original pixel art that runs at a speed based on rpmMilli/1000 and sleeps with "zzz". Blinks, drifting dust and a moth keep the scene moving when nobody interacts.
• Alerts: five queued alerts, each with its own toggle, plus optional generated sound that is off by default.
• Session counter: tracks distance and running time, with a reset parameter. It keeps working if localStorage is unavailable.
• Signal lost: shows SIGNAL LOST, keeps the last good values, and recovers by itself.
• Demo mode: demo=1 runs simulated data through the same logic as the live API.
• Configurator: index.html has a checkerboard preview, a copyable URL, test-alert buttons and a checker for existing overlay URLs.
• Supporting files: source in src/, 24 logic tests, a build script, a lockfile, README.md, DESIGN.md and VALIDATION.md.

Differences from what you'd expect

• No Vite, React or TypeScript: it's plain HTML, CSS and JS with no dependencies, which the brief's "pure static" wording allows and which also works from file://. The lockfile is handwritten and lists no packages.
• dist/ is hand-copied: I wrote it by hand to match src/. Line counts per file matched before one later edit, which I applied to both, but bytes were never compared. npm run build will regenerate it.
• og:image is an SVG: I couldn't produce a PNG without a shell, and some link previews won't display SVG.
• Unseen or unchecked:
  • The sprites have never been displayed, so they may need touch-ups.
  • No contrast ratio has been measured.
  • The Turkish copy hasn't had a native-speaker review.
  • The API field shapes came through WebFetch's summary, not the raw JSON, so the parser accepts both forms where it matters.

What to run once the shell works

npm test && npm run build && git status --short dist
npm run typecheck
node .imd/reads/skills/design-critic/scripts/taste.mjs --out test/scratch/taste

After that, open the three pages with demo=1 at 320, 390 and 1440 wide, then commit. Expect some fixes: this code has never been run, and I only traced the tests by reading them. VALIDATION.md lists each check as not run, along with the review findings.

Area	Result
Requirements	50 reviewed: 46 met, 4 missing, 0 faked
Broken features	4 findings: 1 high, 3 medium
First screen at 390px	Product and copy action visible
taste@1	16/16 passed
Copy	0 findings
Share card	1 SVG; metadata present; unfurl unverified

Saved verified findings, exact source snippets, fixes, and reproductions in .imd-findings.json. Implementation files are unchanged.

• High — bug: A 180-second-old reading remains live despite staleAfterSeconds=120. Remove the additional five-minute allowance.
• Medium — bug: With poll=10 and 2.5-second response latency, requests start 12.5 seconds apart. Schedule from request start.
• Medium — bug: A failed request drops displayed running time from 00:05 to 00:00. Preserve elapsed time before freezing.
• Medium — fidelity: A new 500mm session record updates “Longest run” but generates no record alert. Remove the unrequested one-metre threshold.

The visual idea is a transparent stream companion built around an original pixel hamster, with square stat panels echoing its artwork.

“Missing” below identifies a reproduced failing case within the requirement.

#	Brief requirement	Status	Evidence
1	“static, fully client-side streamer tool”	Met	src/index.html, configurator controls
2	“looks alive even when nobody interacts”	Met	art.js: breathing, blinking, moth, stars
3	“full-scene page for 1920x1080”	Met	src/overlay.html, core.js:PAGES
4	“small corner-widget page”	Met	src/widget.html, 480×270 specification
5	“background fully transparent”	Met	overlay.css: transparent html and body
6	“Configured only through URL query parameters”	Met	overlay.js: parsed URL configuration
7	“position (corner/edge)”	Met	core.js:POSITIONS, eight positions
8	“size/scale”	Met	core.js:SPEC, overlay.js:fit()
9	“at least 3 distinct themes”	Met	Four themes in core.js:THEMES
10	“language (EN or TR)”	Met	core.js:STRINGS
11	“which parts are shown”	Met	Hamster, stats, progress, session and alert toggles
12	Configurator, “live preview,” checkerboard, “copyable overlay URL”	Met	index.html, successful Chromium copy flow
13	“sensible defaults and validation of every parameter”	Met	core.js:SPEC/parseParam, validation messages
14	“Animated pixel-art hamster,” drawn “from scratch”	Met	Original canvas sprites in art.js
15	SPINNING animation proportional to rpmMilli/1000	Met	core.js:animationSpeed, wheel and leg animation
16	IDLE sleeps with “zzz”; healthy rest	Met	art.js:drawSleeper/drawZs, positive status strings
17	Alerts “queued,” “never overlapping”	Met	core.js:createAlertQueue, sequential display
18	“hamster woke up” alert	Met	Engine’s IDLE→SPINNING transition
19	“hamster fell asleep” alert	Met	Engine’s SPINNING→IDLE transition
20	Block alert when blockHeight increases	Met	core.js:createEngine
21	Settlement alert when settledThroughRound increases	Met	core.js:createEngine
22	“session distance record” alert	Missing	core.js:435 suppresses records below 1000mm
23	Each alert “individually toggled” by URL	Met	Five alert_* parameters
24	Optional sound, OFF by default, Web Audio, no audio files	Met	overlay.js:chime, sound=0 default
25	“No alerts” on first data load	Met	Engine baseline guard; passing test
26	Session distance differs from first reading	Met	applySessionReading, sessionView
27	Running time spent in SPINNING	Missing	Counter loses displayed seconds on request failure
28	“URL parameter resets” the session	Met	resolveSession: reset=1 and changed

I fixed all four findings in the code, but nothing has been run: no tests, build, typecheck, design probe or browser check. Bash failed on every call with Sandbox is required but failed to initialize: Failed to create bridge sockets after 5 attempts. The browser tool reported chrome-for-testing not installed, and installing it needs the shell.

I didn't use browser_run_code_unsafe as a workaround, because that would run code outside the required sandbox. So I confirmed each finding by reading and tracing the code, not by reproducing it. All four are marked fixed in .imd-responses.json, and each entry says it wasn't executed.

Finding	Cause	Fix
High: stale readings shown as live	A 180-second-old reading passed against the 120s limit plus a 5-minute tolerance	Removed the tolerance, so anything older than the limit by the local clock is now stale. The generatedAt - observedAt check stays.
Medium: polling slower than configured	The wait started after the response arrived	New nextPollDelay times from the request start, so poll=10 with a 2.5s response waits 7.5s. The timeout is always shorter than the interval, and requests still can't overlap.
Medium: running time jumps backwards	lose() discarded the time the display had been counting up	That time is now saved at the moment of loss, capped at 30s. The display's own cap is at most 20s, so the counter can't drop. It then freezes during the outage and resumes on recovery.
Medium: records under 1 m never alert	A minimum-distance check (RECORD_MIN_MM) blocked the alert	Removed the check. A zero-length run still fires nothing.

One small addition you didn't ask for: a reading with no observedAt or receivedAt is now aged by generatedAt, because it was the same stale-data gap.

Behaviour changes:

• A streaming PC whose clock runs ahead by more than staleAfterSeconds now stays on SIGNAL LOST until the clock is corrected. The reviewer asked for this strictness, and the README now tells streamers to keep time sync on.
• Very short runs can now trigger a record alert early in a session.
• In one sample of the live API, generatedAt and observedAt were under a second apart against the 120s limit, so false alarms look unlikely.

Still to check:

• dist/: I edited dist/assets/core.js and dist/assets/overlay.js by hand with the same changes as src/, because npm run build couldn't run. Line counts match (636 and 343) and the changed lines I searched for match, but that isn't a byte comparison.
• New tests: I added regression tests to tests/logic.test.cjs, including the reviewer's stale and record payloads, and only traced them by hand. Passing is expected but unproven.

Once the shell works, run this; git status should show no change to dist/ from the build:

npm test && npm run build && git status --short dist
npm run typecheck
node .imd/reads/skills/design-critic/scripts/taste.mjs --out test/scratch/taste

README.md and VALIDATION.md now describe the new behaviour and record what didn't run. Nothing has been committed.

All four findings from last round are fixed. I found nothing new to report, so .imd-findings.json holds {"findings":[]}.

Area	Last round	This round
Brief requirements: missing / faked	1 faked (req. 6: stale data shown as live)	0
Broken features	4 (1 high, 3 medium)	0
Product on the first screen at 390	not re-measured	not re-measured
taste@1 checks passed	not re-run	not re-run
Copy findings	0	0
Share card	not re-checked	not re-checked

What I ran: all 28 tests in tests/logic.test.cjs pass, and dist/ is byte-identical to src/. Each of my earlier reproductions was run again in Node against src/assets/core.js:

• Stale data accepted as live (high): fixed. I replayed the reported payload: a reading 180 s old with a 120 s limit, at 2026-11-04T12:00:00Z. engine.ingest now returns signal: "lost" with no events. freshnessVerdict (src/assets/core.js:341) compares the reading's time to the local clock with no extra allowance, and still checks generatedAt against observedAt.
• Network delay stretching the poll interval (medium): fixed. nextPollDelay(10, 0, 2500) returns 7500 ms, so requests now start 10 s apart. pollStatus (src/assets/overlay.js:267-272) only schedules the next request after the current one settles, and its timeout is shorter than the interval, so requests can't overlap.
• Running time jumping back on signal loss (medium): fixed. I fed one SPINNING reading at t, then failed requests at t+7.2 s and t+14.2 s. runningMs is 7200 after the first failure and stays at 7200 through the second. The first reading after recovery keeps 7200, and the next one adds normally (14200). The overlay shows the stored time plus an estimate capped at poll*2000. The stored value is never below what was on screen, so the counter freezes rather than going backwards.
• Records under one metre never alerting (medium): fixed. With the IDLE 1000 → SPINNING 1000 → IDLE 1500 sequence, the third reading now produces sleep and then record(500).

One edge I checked and am not reporting: lose() can save up to 30 s of running time, while the display estimate stops at poll*2000. When there is a long gap since the last reading, the counter can step forward a few seconds when the signal drops. A normal reading after the same gap adds the same amount, so this is consistent behaviour, not a defect.

Limits:

• Playwright isn't installed on this machine, so I couldn't redo the browser reproductions.
• The overlay passes Date.now() straight into the same engine functions I tested, so the Node results stand in for the browser.
• I didn't re-run the taste@1 probe or the 390 px first-screen check, because this round was about settling the earlier findings.

I removed my scratch scripts. The only file I wrote is .imd-findings.json.