[oddharsh]

Two follow-ups to #341 (now on main) and #345.

Base note: #341 has merged, so this now carries only #345 plus the fixes. It still contains #345 in full, because the fixes edit code #345 introduces. Merge #345 first and this collapses to scripts/build.mjs, www/_headers, the shell files and the regenerated pages; or merge this and close #345 as carried.

Both were found the same way: by reading each PR's own wire-size report against the tree.

1. The /a/ names now dehash to their own filenames

#341 gave the three first-interaction sheets a -style suffix in /a/, because nav-run was already taken by nav-run.js in the same STRING_ASSETS map. perf-snapshot merges the top-level copy and the /a/ copy on the dehashed filename, so a base that does not match its file never merges, and every byte is counted twice.

That is why #341's table reads +4.82 KiB across 22 files for a change that takes 1.28 KiB off the critical path. The code was right; the instrument was reading a name.

base tracks the file now, and the js/css pairs sharing a stem are told apart by extension inside hashedFor.

2. A section's favicon is in its own <head>

#345 compiled the section tiles into real SVG assets, then had nav.js find them through a data-favicon attribute on each taskbar pin. Two costs come with that: the attribute rides all 46 pages so that 11 of them can read one, and setFavicon() still applied it after boot, so a section page painted one icon and swapped to another.

The document declares it now. SECTION_FAVICONS is projected into lib/desktop.js beside DESKTOP_CHROME, lunaPage reads its own route, and the four section routes outside lunaPage (/writing, /serendipity, /coffee, /terminal) state it themselves. /pixel-peeper had no head icon at all and relied entirely on the script, which is the fragility this removes. Anything that is not a section keeps /favicon.ico.

setFavicon() and every data-favicon are gone.

3. /section-icons/* is cached

Unruled, the tiles inherited the static-assets default of max-age=0, must-revalidate, verified against the comparable /icons.svg in production:

$ curl -sI https://aadhar.sh/icons.svg
cache-control: public, max-age=0, must-revalidate

So every section page view spent a 304 on an icon that changes about never, where the old data: URI needed no request. 30 days, matching /og/, the other generated-but-unhashed image tier. Deliberately not immutable: these are not content-addressed, so a year would be a lie. Checked against gotcha 31 as well, since a _headers rule combines rather than overrides. Nothing else carrying a Cache-Control matches this path, so it stands alone.

Measured, against origin/main before these merges

	#341 + #345	with these fixes
client assets	+4.82 KiB / 22 files	+0.30 KiB / 19 files
pages	+2.18 KiB	-0.19 KiB
dictionary deltas (pd/)	+6.52 KiB	+0.09 KiB

luna.css -1.45 KiB and nav.js -1.29 KiB off the render-blocking path, with the three sheets (3.05 KiB) moved behind first interaction.

Validation

Re-run after rebuilding on the post-merge main (so #342, #343 and #344 are in the base):

• contract tests: 241 pass, 0 fail
• worker typecheck and browser typecheck (test: typecheck browser interaction modules #343's new project): both clean
• production build: clean, and pnpm run gen:shell is a no-op against the committed tree
• lunaPage rendered for /lens, /terminal, /around, /reading returns the section tile; /security and a routeless page return /favicon.ico
• the new contract test asserts the three regressions: a pin carrying favicon data again, nav.js setting an icon again, and a TASKBAR route whose tile is missing from disk. Both negative controls were run and fail, so it is not agreeing with itself.

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	aadhar-sh	836d40f	Aug 12 2026, 02:03 PM

[github-actions]

Wire-size diff vs merge base

8e32771 → fa1df21

Brotli q11, the quality the edge serves. Every number here is deterministic:
an unchanged file produces no row. Advisory — this check fails on nothing.

Client assets

Total Brotli: 72.60 KiB → 68.07 KiB (-4.53 KiB, -6.2%) across 19 files, 4 changed.

file	base	head	Δ
nav-run-style.css	1.75 KiB	—	removed
nav.js	7.20 KiB	5.72 KiB	-1.49 KiB (-20.6%)
nav-tray-style.css	0.78 KiB	—	removed
infotip-style.css	0.52 KiB	—	removed

Pages

Total Brotli: 490.58 KiB → 490.31 KiB (-0.27 KiB, -0.1%) across 48 files, 44 changed.

file	base	head	Δ
lwe/index.html	4.65 KiB	4.43 KiB	-0.22 KiB (-4.7%)
garage/index.html	10.21 KiB	10.06 KiB	-0.15 KiB (-1.5%)

_{Plus 42 files under the 0.13 KiB floor, net +0.09 KiB — usually content-hash churn in /a/ references, counted in the total above.}

Worker bundle

276.28 KiB → 276.27 KiB gzip (-0.01 KiB, -0.0%)

Largest module deltas (raw bytes in bundle):

file	base	head	Δ
.build/www/_worker.js/lib/desktop.js	6.17 KiB	6.66 KiB	+0.49 KiB (+8.0%)
.build/cal/src/templates.js	18.70 KiB	18.28 KiB	-0.42 KiB (-2.2%)
.build/www/_worker.js/lib/chrome.js	6.56 KiB	6.76 KiB	+0.21 KiB (+3.1%)
.build/serendipity/serendipity.js	114.17 KiB	114.25 KiB	+0.08 KiB (+0.1%)
.build/www/_worker.js/writing.js	15.66 KiB	15.73 KiB	+0.07 KiB (+0.4%)
.build/www/_worker.js/terminal.js	46.08 KiB	46.11 KiB	+0.02 KiB (+0.1%)

Dictionary deltas (pd/)

140 → 140 deltas, 533.08 KiB → 532.98 KiB (-0.10 KiB).