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fix(headers): add includeSubDomains to HSTS (R2) - #233
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Every subdomain in the j-chain.net zone serves HTTPS (img-origin) or no web traffic (cf-bounce mail records), so the one-year HSTS header now covers subdomains too. preload stays off and still needs Danny's yes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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…eline Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Danny confirmed includeSubDomains on 2026-10-28, after the 2026-10-27 zone audit (#233). The 2026-10-22 decision is marked superseded for that flag; preload still needs a separate yes. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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Summary
Every Worker response now sends
Strict-Transport-Security: max-age=31536000; includeSubDomains(wasmax-age=31536000).preloadstays off.Why: a Cloudflare zone audit of j-chain.net on 2026-10-27 confirmed every subdomain either serves HTTPS only (
img-origin.j-chain.net, the R2 custom domain, min TLS 1.2, Worker-only via the WAF rule) or carries no web traffic (cf-bouncemail records). The same audit turned on Always Use HTTPS and min TLS 1.2 at the zone, so HTTP now redirects before HSTS matters.Already deployed. This commit is live as build
48cc559(Worker versionf565946e…), deployed from this branch on top ofmain(a8f22f2) with the runbook command.npm run smoke -- https://j-chain.netpassed all checks. Until this merges,mainis one commit behind production, and a deploy frommainwould drop the header back.Changes:
src/ops.ts: the header value inwithSecurityHeaderstest/ops.test.ts,scripts/smoke.mjs: expected valuedocs/SPEC.mdR2: header text, and theincludeSubDomainsline now records the 2026-10-27 request. The v0.2.22 "Needs Danny" entry stays as history. Danny: R2 said each flag needs your yes. Please confirmincludeSubDomains.preloadstill needs a separate yes.docs/RUNBOOK.md: smoke check description, and a new Zone security baseline section (the zone settings set on 2026-10-27)docs/TICKETS.md: Now log entry for the 2026-10-27 zone hardening and the manual deploy of48cc559Checklist
npm test: 589/589;tsc --noEmitclean).env, or real user data*.j-chain.nethost for a year. Any future subdomain must serve HTTPS.🤖 Generated with Claude Code