docs(ui): react-pages html-tier names are verbatim, not kebab-case (#16164)

[claude]

Fixes #16164

What the paragraph said, and what was wrong

content/docs/ui/react-pages.mdx's html-tier spelling paragraph told authors that
registered block names are "lowercase and kebab-case". Four registered names carry
an underscore after their namespace prefix, so that gloss was wrong for them and
would lead an author who read the rule (rather than the worked examples) to derive
a kebab-case respelling that is not registered.

Registry reading (objectui, read-only, this PR touches nothing there)

objectui origin/main at read time: 15789d5655753c6cf4f0e01ea9fa63f184ff68c0.

git show origin/main:packages/core/src/registry/public-blocks.ts \
  | grep -oE "^\s*'[a-z][a-z_:-]*'," | grep -oE "'[a-z][a-z_:-]*'" | sort -u

57 entries total, 28 carry a namespace prefix (record: / page: / element: /
action:), 4 are snake_case after the colon:

• record:line_items
• record:quick_actions
• record:reference_rail
• record:related_list

These numbers match the card's own reading (at a slightly earlier objectui sha,
b8e3f8379) exactly — 57 / 28 / 4, same four names, same four prefixes.

sdui-parser exact-match confirmation (this repo)

• packages/sdui-parser/src/index.ts:41 — const allowedTags = new Set(Object.keys(manifest.components))
• packages/sdui-parser/src/parse.ts:95 — if (this.opts.allowedTags && !this.opts.allowedTags.has(tag))

No toLowerCase/replace/normalisation touches the tag-matching path (the one
.replace(...) in parse.ts collapses whitespace in text content, unrelated to tag
names). The comparison is an exact Set.has, so <record:related-list> (kebab-case)
is rejected at save time exactly like a PascalCase borrow — confirming the doc's
"verbatim" framing and the negative example now added.

The fix

Dropped the "lowercase and kebab-case" gloss, kept the verbatim rule standing on its
own, added a second snake_case example (record:line_items) alongside the existing
record:related_list, and added one sentence making the negative concrete: a
re-spelled name that "looks uniform" is not registered — <record:related-list> is
rejected at save time, only <record:related_list> exists. No other content changed.

Gates (pinned to a955b752)

Gate list derived via node scripts/pm/dispatch-gates.mjs --commands (no path
argument — self-derived from the working-tree diff vs merge-base 0e16fc454 of
origin/main and HEAD), 38 commands matched by path or whole-tree declaration:

33/38 green:
check-ci-filter-parity, check-closing-keyword-parity (+ --self-test),
check-comment-mask-corpus, check-doc-frontmatter (+ --self-test),
check-doc-route-spelling --advisory (+ --self-test), check-docs-section-name
(+ --self-test), check-section-landing-index (+ --self-test),
check:empty-state, check:liveness, check:strictness-ledger,
check:variant-docs, check:yaml-examples, check:corpus-claim-drift,
check:cross-package-test-inputs, check:doc-anchors, check:doc-authoring,
check:docs-audit-scope, check:docs-redirects, check:docs-single-h1,
check:driver-memory-census, check:nul-bytes, check:published-readme-links,
check:react-page-adapter-contract, check:refd-timer-probe, check:role-word,
check:skill-identifier-liveness, check:vendor-version-stamps,
check:watch-hint-literal — all exit 0.

5/38 NOT MEASURED (PREREQUISITE NOT MET, not findings):
check:doc-formula-expressions and check:doc-security-posture (both print
"Nothing was measured... Fix: pnpm exec turbo run build --filter=@objectstack/formula
--filter=@objectstack/lint", exit 3), check:docs (spec docs check needs
gen:schema first, exit 1 with an explicit "generate it first" message),
check:skill-examples (needs @objectstack/spec build first, exit 1, explicit
false-green warning if skipped), check:docs-transcript-drift (needs
@objectstack/lint built — packages/lint/dist/index.js missing — explicit
"PREREQUISITE NOT MET", exit 3). All five name the exact build needed rather than
reporting a real check result. The container's shared heavy-verify lock
(scripts/pm/os-verify-lock.sh) had a holder plus a queued waiter building the
same package set (spec+lint+client-react) when this PR was opened; per this
lane's resource discipline, the scope was collapsed here rather than waited on
indefinitely, and these five are reported honestly as NOT MEASURED.

skip-changeset label applied (docs-only change under content/docs/**).

Open questions

None — no fork in this fix; the card's triage ruled pm:queue with no decision box.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Vbw3RPgdtqesx4azk9SbW8

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