#27882 — evidence, 9/9 rows

Before cb9629e689
After c60e8ba864

Linux x86_64 fs-32 (kernel 6.1.102); agent-browser-owned headless Chromium 148.0.7778.96 driven through CDP; no device emulation (mobile=false); DPR 1; 100% font scaling, root 16px, shipped Inter Variable; CSS viewports 1440×1000 and 390×844; explicit light/dark as labelled. Browser Date fixed at 2026-11-03T04:00:00Z; real timers continue. Reduced motion emulated. Sidebar collapsed, detail panel closed, scroll origin. List column equals viewport width (1440/390); warning content is 1104/338px.

Beyond the added wording: wrapping and centred controls move; P06 also has a small title-glyph rasterization change. These are listed below.

What else changed

P01 and P07 failed/returned: adds “Remote B — issue 27821: ” to the actual direct-connection transport error. Existing message/suffix wrap differently; banner height and Retry position stay fixed.
P02 and P08 start/returned: longer description wraps from four to five lines. The vertically centred block grows: icon/title move 10px upward and Retry moves 10px downward.
P03: the long environment prefix adds two lines. Warning height grows 32px (bottom 399→431); Retry shifts 16px downward. Full text stays within the 390px viewport.
P04: the long environment prefix adds two description lines. Icon/title move 20px upward and Retry moves 20px downward; no horizontal clipping.
P05: adds “Environment: ” within the existing single-line warning. Missing-map and empty-map captures are byte-identical on each revision.
P06: adds “Environment: ” and widens the centred description. A few title glyph pixels also change; fractional horizontal centering is the likely cause (inference). Both fallback-map inputs are byte-identical on each revision.
P09: C prefix for Error("C unavailable"), B prefix with existing default for whitespace Error.message, C prefix again after B recovers, then C prefix with existing default for a non-Error cause. Warning box and stable row stay fixed.
P07 healthy/recovered and P08 recovered: zero changed pixels at threshold zero. All 19 settled comparisons have zero changes outside their error-region bounding boxes; counts and boxes are in manifest.json.
Recordings use real network latency, so click-to-result durations differ across revisions. No RPC delay or minimum busy duration was imposed; both P08 runs observed disabled/aria-busy false→true→false.

Diff0: abs RGB delta ×16, saturated, threshold 0. DiffT: magenta where max channel delta >16/255; black elsewhere. Full viewports; sheets scale entire frames without cropping. Every still was accepted only after fonts/network idle and identical PNGs 500ms apart. All selected captures/diffs/sheets and recording contact sheets were visually inspected.

P01 — REAL · named warning beside one row

P01 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P01-light 1440×1000 light changed pixels: 9491 / 8554	before	after	diff0	diffT
P01-dark 1440×1000 dark changed pixels: 9490 / 8793	before	after	diff0	diffT

P02 — REAL · named centred error with zero rows

P02 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P02-light 1440×1000 light changed pixels: 21268 / 16742	before	after	diff0	diffT
P02-dark 1440×1000 dark changed pixels: 20927 / 17685	before	after	diff0	diffT

P03 — HARNESS · narrow long warning

P03 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P03-dark-390 390×844 dark changed pixels: 23539 / 21326	before	after	diff0	diffT

P04 — HARNESS · narrow long centred error

P04 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P04-light-390 390×844 light changed pixels: 22049 / 15591	before	after	diff0	diffT

P05 — HARNESS · missing/empty label fallback warning

P05 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P05-dark 1440×1000 dark changed pixels: 2969 / 2730	before	after	diff0	diffT

P06 — HARNESS · missing/empty label fallback centred error

P06 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P06-light 1440×1000 light changed pixels: 2192 / 1775	before	after	diff0	diffT

P07 — REAL · healthy → failure → Retry → exclude B

Before scripted actions / seconds: 0.084s Healthy list, all servers, query 27882 author:juliusmarminge; 1.119s Stop B (verified isolated port owner); 2.120s Select query, type 27882 label:bugfix, press Enter; 2.324s Click header Refresh to force a fresh query; 3.779s Failure settled, A row retained; 6.001s Click banner Retry; 7.295s Repeat failure confirmed in settled checkpoint; 8.380s Open Filters; 8.443s Open Server submenu; 8.521s Choose server fs-32; 8.830s Dismiss filter menu with Escape; 10.032s Warning gone, A row retained

After scripted actions / seconds: 0.068s Healthy list, all servers, query 27882 author:juliusmarminge; 1.102s Stop B (verified isolated port owner); 2.103s Select query, type 27882 label:bugfix, press Enter; 2.264s Click header Refresh to force a fresh query; 3.529s Failure settled, A row retained; 5.734s Click banner Retry; 6.979s Repeat failure confirmed in settled checkpoint; 8.050s Open Filters; 8.103s Open Server submenu; 8.168s Choose server fs-32; 8.432s Dismiss filter menu with Escape; 9.686s Warning gone, A row retained

Before cb9629e689	After c60e8ba864
before recording	after recording

P07 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P07-healthy 1440×1000 dark changed pixels: 0 / 0	before	after	diff0	diffT
P07-failed 1440×1000 dark changed pixels: 9490 / 8793	before	after	diff0	diffT
P07-returned 1440×1000 dark changed pixels: 9490 / 8793	before	after	diff0	diffT
P07-recovered 1440×1000 dark changed pixels: 0 / 0	before	after	diff0	diffT

P08 — REAL · centred Retry → failure → healthy empty

Before scripted actions / seconds: 0.074s Settled centred failure, all servers; 1.075s Click centred Retry; 3.610s Centred failure returned; 4.681s Open Filters; 4.728s Open Server submenu; 4.799s Choose server fs-32; 5.109s Dismiss filter menu with Escape; 5.111s Ordinary empty result, failure gone

After scripted actions / seconds: 0.082s Settled centred failure, all servers; 1.083s Click centred Retry; 2.315s Centred failure returned; 3.379s Open Filters; 3.427s Open Server submenu; 3.471s Choose server fs-32; 3.760s Dismiss filter menu with Escape; 3.762s Ordinary empty result, failure gone

Before cb9629e689	After c60e8ba864
before recording	after recording

P08 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P08-start 1440×1000 light changed pixels: 21268 / 16742	before	after	diff0	diffT
P08-returned 1440×1000 light changed pixels: 21268 / 16742	before	after	diff0	diffT
P08-recovered 1440×1000 light changed pixels: 0 / 0	before	after	diff0	diffT

P09 — HARNESS · first failing target and default messages

Before scripted actions / seconds: 0.060s Ordered targets A,B,C; A has one row; C fails first in time; 1.561s B fails later with whitespace Error.message; 4.287s B recovers; C remains failed; 7.005s C fails with a non-Error cause

After scripted actions / seconds: 0.079s Ordered targets A,B,C; A has one row; C fails first in time; 1.580s B fails later with whitespace Error.message; 4.338s B recovers; C remains failed; 7.097s C fails with a non-Error cause

Before cb9629e689	After c60e8ba864
before recording	after recording

P09 whole-viewport before after zero and threshold diffs

Fixture / viewport / theme	Before cb9629e689	After c60e8ba864	Diff0 cb9629e689 → c60e8ba864	DiffT cb9629e689 → c60e8ba864
P09-C 1440×1000 dark changed pixels: 2261 / 2089	before	after	diff0	diffT
P09-B-default 1440×1000 dark changed pixels: 2954 / 2760	before	after	diff0	diffT
P09-C-returned 1440×1000 dark changed pixels: 2261 / 2089	before	after	diff0	diffT
P09-C-default 1440×1000 dark changed pixels: 2886 / 2658	before	after	diff0	diffT

Reproduction and inputs

Unverified matrix rows: none. P03–P06 and P09 use a labelled controlled boundary harness with the actual page, route, CSS, merged-query helper, formatter, and error renderers. Synthetic relay text does not demonstrate T3 Connect. Real captures use a directly paired stopped B.