A purpose-built reader replaces the generic decoder: the integer rule sees the wire family (float-encoded
integers refused), nil in a reference slot reads as null and writes back as nil, missing trailing slots take the
reference's initialisers, extra slots and trailing bytes are skipped, invalid UTF-8 decodes to U+FFFD with the BOM
kept, and a map-form manifest is refused as 'manifest'. Validation still refuses nil chunks. Public type change:
string, tags and metadata fields are nullable. The acceptance vectors that judge this land in the next commits, so
content.test.ts is red until the C# writer has produced them.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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