# W3 — online control
Before [701e13c](https://git.cafe/pingdotgg/t3code/commit/701e13cebb040d8433cd9aefb803ddd0d58c41d6); after [37441e9](https://git.cafe/pingdotgg/t3code/commit/37441e905194b062345c76d81caacd00d77ef5e5).
Environment: Linux x86_64 (fs-33); Chromium 148.0.7778.96 / Playwright headless shell build1223; no device emulation; DPR1; zoom/font scale100%; dark; prefers-reduced-motion: reduce; full viewport1440×900 except W6 390×844. Actual Electron44.10.0 under headless-desktop/Xvfb, --no-sandbox --disable-gpu, ImageMagick import, measured renderer1440×900/DPR1. Paired sides share synthetic data, scroll position and rendered clock within each run. Retained web clock20:00 UTC, desktop22:19 UTC; round2 rendered clock00:00 UTC, native Date.now/timers for grace/backoff. This row is1440×900.
Ordinary true-report reload through live stopped history; one primary app socket, connected generation1. Retained round1 stills are reused; round2 adds same-script startup recordings. Both still pairs are pixel-identical at threshold0.
Steps and UTC checkpoints (relative seconds from each side’s recording start; a dash means state-only capture):
| Side | UTC | t(s) | Action/state checkpoint |
|---|---|---:|---|
| before | 2026-11-03T00:12:52.761Z | 0.00 | W3-online-control-video-start |
| before | 2026-11-03T00:13:01.118Z | 8.36 | settled-still W3-online-control |
| before | 2026-11-03T00:13:01.136Z | 8.38 | W3-online-control-ready PrimaryConnectionTarget:connected |
| before | 2026-11-03T00:13:01.443Z | 8.68 | W3-online-control-video-stop |
| after | 2026-11-03T00:13:08.475Z | 0.00 | W3-online-control-video-start |
| after | 2026-11-03T00:13:17.360Z | 8.88 | settled-still W3-online-control |
| after | 2026-11-03T00:13:17.371Z | 8.90 | W3-online-control-ready PrimaryConnectionTarget:connected |
| after | 2026-11-03T00:13:17.733Z | 9.26 | W3-online-control-video-stop |
Recordings, with the steps/timestamps above: before [W3-before.mp4](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/abc93dd21b68b3e7/W3-before.mp4); after [W3-after.mp4](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/c316cab51d8b12a0/W3-after.mp4).
| Checkpoint | Before | After | Diff0 | DiffT16 |
|---|---|---|---|---|
| W3 | 
[701e13c](https://git.cafe/pingdotgg/t3code/commit/701e13cebb040d8433cd9aefb803ddd0d58c41d6) | 
[37441e9](https://git.cafe/pingdotgg/t3code/commit/37441e905194b062345c76d81caacd00d77ef5e5) | 
[701e13c](https://git.cafe/pingdotgg/t3code/commit/701e13cebb040d8433cd9aefb803ddd0d58c41d6) → [37441e9](https://git.cafe/pingdotgg/t3code/commit/37441e905194b062345c76d81caacd00d77ef5e5) | 
[701e13c](https://git.cafe/pingdotgg/t3code/commit/701e13cebb040d8433cd9aefb803ddd0d58c41d6) → [37441e9](https://git.cafe/pingdotgg/t3code/commit/37441e905194b062345c76d81caacd00d77ef5e5) |
Before every selected still: fonts and network idle, reduced motion where supported, then two byte-identical screenshots500ms apart. All selected stills/diffs were opened and recordings skimmed. Diff0 amplifies every nonzero max-RGB delta (including one-level changes) in magenta; DiffT16 uses delta>16/255; unchanged after pixels dimmed to20%. Comparisons are within each row/pair, not across round1/round2 fixture variants. Transient splash/sync frames in recordings are actual startup transitions; selected stills exclude them.
Protocol/state transcript: [web-protocol-r2.jsonl](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/bf1fdba4db4934f3/web-protocol-r2.jsonl).
Reproduction: [runbook-r2.md](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/87a66f49edaafd9e/runbook-r2.md); [capture-scripts-r1.tar.gz](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/35d67210cb0f10ea/capture-scripts-r1.tar.gz); [capture-scripts-r2.tar.gz](https://gh-file-drop-api-prod-mi5fy3sowv63ufte.pinglabs.workers.dev/f/6e4dbccb05066738/capture-scripts-r2.tar.gz).