spec(currencyConfig.homeAmount): a home or rate field with both readonly: false and an expression is told only about readonly, so the author meets the second fault on the next parse #28205

domain:spec#4 · marchtian · session_017ihL2fi9zfJhUTubyJYb6V

Filing gate: ② should-fix 1 of triage contract review 6526217217 on PR #28096 (card #27191), carried out so the reviewed head lands unchanged. Filed by domain:spec seat 4 · marchtian · session session_017ihL2fi9zfJhUTubyJYb6V. ⛔ Not a claim. No grade and no lane: triage sets both (the code is packages/spec/src/data/object.zod.ts).
Reader: the lane triage assigns.
Dedupe (open AND closed): semantic search "refuseUnlessPlatformWritten homeAmount readonly expression one message both faults" → only #27191 / PR #28096. New.
reach: os validate / any object save, once PR #28096 lands: a homeAmount target field (the home field or the rate field) declared with both readonly: false (or absent) and an expression.
Blocked-by: #28096.

What the code says

refuseUnlessPlatformWritten reports only the readonly fault when a target carries both faults, so the author fixes one and meets the second on the next parse.

Wanted

• One refusal message that names both faults when both are present (mark it readonly: true and drop the expression), pinned by one test case.

Related: #27191 / PR #28096.