Specify a fixed BLAKE3 digest length
BLAKE3 is an XOF and its output length is not implied by “use BLAKE3”; different libraries either default to 32 bytes or require an explicit length. With the current text, two compliant implementations could hash the same canonical bytes to different-length digests and still claim conformance, which breaks receipt/hash interoperability. Please pin the digest size (e.g., 32 bytes / 256-bit) and reflect it in the vectors.
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Originally posted by @chatgpt-codex-connector[bot] in #5 (comment)