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docs: add info about Blob serialization to protocol.md #171

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kentonv merged 1 commit into from
May 15, 2026
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docs: add info about Blob serialization to protocol.md #171

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4 changes: 4 additions & 0 deletions protocol.md
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Expand Up @@ -172,6 +172,10 @@ The values Infinity, -Infinity, and NaN.

A `Uint8Array`, represented as a base64-encoded string.

`["blob", type, readableExpression]`

A `Blob` value. `type` is the MIME type string (`blob.type`), which may be an empty string. `readableExpression` is an expression that evaluates to a `ReadableStream` carrying the blob's bytes; in practice, the encoder always uses a `["readable", importId]` expression backed by a pipe. Because reading a `Blob`'s bytes is inherently asynchronous, the pipe path is always used — there is no inline fast path even for small blobs. The receiver must collect all chunks from the stream before delivering the value to application code.

`["bigint", decimal]`

A bigint value, represented as a decimal string.
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