[oddharsh]

What changes

/serendipity/mcp-info ("For agents") is a fixed tool list and an endpoint URL, with nothing read per request. It still rendered per request, and serendipity's html() helper stamps no-store on every page. So it went out at the edge's q4 brotli with no ETag and no dcz delta, and it minted a uid cookie on a page that never uses one.

Build step 5b now bakes it as a plain document. It needs no island, since nothing on it is live, and the build asserts two renders agree. routeSerendipity's static branch serves it the way it serves the dashboard (#929): serendipity's own policy with the build's hash in place of 'unsafe-inline', and headers passed through serveStaticPage, so the precompressed body is never rebuilt (gotcha 13).

	today (production)	after (built Worker)
wire	7,587 B, no-store	4,976 B q11 twin
return visit	7,587 B again	304 with no body
after a deploy	7,587 B	3,489 B family delta
script-src	'unsafe-inline'	one hash (the shared speculation rules)
uid cookie	minted	none

Coverage

It isn't a registered surface, so the per-request ratchet from #930 doesn't see it. The contract test pins the bake and the live render to the same bytes instead, so the live arm local dev uses can't drift from what ships.

Verification

• bun run build, bun run lint, bun run typecheck: clean.
• bun run test: 934 pass. bun run test:node: 924 pass, 10 skipped (HTMLRewriter-only), 0 fail.
• bun run routes:check: 190 routes, 0 failures, with a new fullPage row for the page. /serendipity still serves the dashboard's built shell next to the new serendipity/ staging directory.
• Against the built Worker: content-encoding: br, an ETag, serendipity's policy carrying the hash, no set-cookie, and a body that decodes once to the minified page.

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	aadhar-sh	ac29ea3	Sep 25 2026, 08:46 PM

[github-actions]

Wire-size diff vs merge base

000a18b03a7495bea60a28076223e1cca1cfeb64 → 24f9ecd43a73ea9250b11343fe8ea62131c915f4

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

No change. 27 files, 91.60 KiB Brotli total.

Pages

Total Brotli: 631.36 KiB → 636.22 KiB (+4.86 KiB, +0.8%) across 66 files, 1 changed.

file	base	head	Δ
serendipity/mcp-info.html	—	4.86 KiB	new

Worker bundle

259.53 KiB → 259.54 KiB gzip (+0.01 KiB, +0.0%)

Largest module deltas (raw bytes in bundle):

file	base	head	Δ
.build/src/worker/lib/csp-hashes.ts	7.43 KiB	7.50 KiB	+0.07 KiB (+1.0%)
.build/serendipity/serendipity.ts	91.28 KiB	91.30 KiB	+0.02 KiB (+0.0%)
.build/src/worker/index.ts	14.07 KiB	14.08 KiB	+0.02 KiB (+0.1%)

Dictionary transport

Family dictionary acquisition: no change, 14.41 KiB q11.

pd/: 177 → 178 deltas, 525.14 KiB → 528.55 KiB (+3.41 KiB).