Read screenshot identity from the selected frame-tree root instead of a
filtered inventory that could substitute a child. Reuse the frame record
parser for initial and event identities, rejecting malformed roots before
capture while preserving known origin refusals.
Share explicit origin-scope diagnostics across CDP workflows without
changing policy or conflating startup uncertainty, document replacement,
worker protection, and Inspector restrictions. Document the recovery and
make screenshot navigation fixture ordering explicit.
Validation: 577 focused checks passed across 13 files; one platform-specific
invalid-byte-filename case skipped. Build, typecheck, lint, formatting,
generated documentation checks, README conformance, and discovery passed.
No full suite or live browser/provider execution.
morluto