An absolute embed address works where it was built and breaks everywhere
else, which is how the CDN route failed and was retired. The build config
keeps embedBaseUrl empty, so the committed tree is relative and a deploy
makes it absolute at build time (EMBED_BASE_URL). But nothing stopped a
tree built with EMBED_BASE_URL from being committed: check:drop looks for
root-relative "/..." references and deliberately skips https:// ones.
With embedBaseUrl empty in the config, the manifest must say embedBase "."
and every scriptUrl, iframeUrl and embed snippet src must be relative. Data
addresses (runtime.apiBaseUrl) are not the tree and are not checked. SKIPs
when the config sets embedBaseUrl. In gates:post, after check:drop.
Today's tree: PASS, embedBase "." and 173 embed addresses, all relative.
Poison-tested, each fails: an absolute snippet src, an absolute embedBase,
a protocol-relative iframeUrl, an empty manifest. A real deploy manifest
built with EMBED_BASE_URL fails with 174 findings, as it should.
gates:post: PASS 82, NOT MEASURED 13 (browser/server), FAIL 1: the known
check:packets-all worktree failure (no generated zone packets here).
