Closes#2051. errorCauseTag() shipped in #2027 written and tested but
wired to nothing. This connects it: the two execution catch paths (sync
call and task) now pass errorCause into mcp.tool_called, carrying the
SQLSTATE or coded-error code, else the error's class name, capped at 64
chars.
The rows this exists for are the UNKNOWN_ERROR residue, whose
errorMessage is the constant "Något gick fel. Försök igen." and whose
errorDetail is the English constant: 465 such rows in the last 30 days
(create_voucher 58 of its 60 failures, query_journal 122) with nothing
to cluster on. A five-character SQLSTATE is protocol vocabulary; a raw
driver message can quote row values from a constraint violation and
belongs in the server log, never in event_log, so the raw message is
deliberately not captured.
A plain `new Error(...)` tags null rather than 'Error': tagging
everything is the same as tagging nothing. Pre-execution denials (scope,
capability, validation, unknown tool) pass nothing because their
errorCode already is the cause.
Self-tested by unwiring one call site and watching the new test name it.
Claude-Session: https://claude.ai/code/session_01L3P2hr19PhQuCoTSGoegcY
Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Jakob Wennberg
dd84d6c1bb