messageDigestInput
Function: messageDigestInput()
messageDigestInput(
message):string
Defined in: src/lib/time-travel/receipt.ts:450
The bytes a message's hash covers, each field behind a separator: its role,
its text, its toolCallId, its toolName, the calls it asked for (id, name,
arguments and providerMeta) and its thinkingBlocks.
WHY toolCallId (9.88.0). It is the JOIN KEY — tool_use_id on Anthropic's
wire, tool_call_id on OpenAI's — that pairs a tool result to the call that
asked for it. Two parallel calls whose results happen to have identical text
hashed the SAME without it, so a mis-pairing (the answer to c1 filed under
c2) was invisible to the law: exactly the defect a receipt exists to catch.
WHY toolName TOO (9.88.0). On two shipped providers the id is not the join
key at all. adapters/llm/GeminiProvider.ts · toGeminiContents pairs a
functionResponse to its call BY NAME and says so in its own comment; the
id is optional there and dropped when it is not a real one.
adapters/llm/OllamaProvider.ts · toOllamaMessages puts tool_name on
the wire and only falls back to the id. So on those providers a receipt that
covered toolCallId alone still could not see the very mis-pairing the
field was added for: two role:'tool' messages with identical text and
SWAPPED names fingerprinted identically. It rides as its own field behind
the separator, beside the id, so a name moving between two results changes
both hashes and neither can absorb the other's bytes.
WHY thinkingBlocks and providerMeta (9.88.0). adapters/types.ts is
explicit that a signed thinking block MUST be echoed byte-exact or the API
rejects the turn, and providerMeta round-trips vendor state (Gemini's
thoughtSignature, without which the turn after a tool call is refused).
Both are things the model receives; a fingerprint that omitted them said two
requests were the same when one of them would be rejected. They enter as a
stableJson FINGERPRINT, so nothing quotable is added — a signature is an
opaque token, not content.
Still deliberately NOT covered: injectedBy (stripped before the request
exists) and ephemeral (a persistence flag, invisible to the model). Two
messages that hash the same are the same thing said to the model.
Parameters
message
Returns
string