[cguodesign]

An invalid or clamped markStyle could report the same diagnostic on every React commit. An onIssue callback that stores that diagnostic in state then sustained a feedback loop even though the overlay rendered only once. Compare snapshots of the raw style fields before normalizing again, including NaN and malformed JavaScript values; changed inputs, in-place edits and valid-to-invalid recovery still report correctly.

Also preserve the first editorial animation when an earlier unsupported scene contained no drawable marks.

Align the website's five-language lifecycle, measurement, scheduling and CSS-variable guidance with the implementation. Correct wrapped-renderer error and conditional overlay-preservation descriptions across the public guides and agent discovery files. Bounds-valid offsets are not automatically diagnosed as semantically stale. Record these fixes under Unreleased; no package was published or site deployed.

Validation:

• New diagnostic regressions first reproduced the state loop, then passed; 28 targeted unit tests and the new first-visible-animation browser regression pass.
• The original browser reproduction now settles at one diagnostic, two host renders and one overlay render, rather than 12 repeated diagnostics.
• Ten copied complete Get started examples pass strict typechecks and browser mounting; all 12 docs TS/TSX fragments typecheck with explicit host context. Copied vanilla lifecycle and helpers examples execute successfully.
• Independent review mapped all 16 English docs sections to source/evidence and rechecked the corrected five-language API semantics. This is not a claim of independent native-speaker certification or exhaustive input/browser coverage.
• Final local and Linux verify:release passed: 183 unit tests, 159 browser tests, 11 built-site tests, all five fresh consumers, builds, typechecks, security/docs/package/bundle audits, and diff checks. No failure annotations. Linux run: https://github.com/cguodesign/proofmarks/actions/runs/40636778336 .