This contract failed intermittently with "a typed batch did not reach
the compositor", reporting Panama's shipped defaults, and passed on
retry. The earlier guard against a lingering harness was not the cause --
no instance was alive.
Adding the writer's own error to the failure message settled it: the
writer reports NO error while the compositor holds defaults. A rejected
write leaves an error behind; a write that succeeded and was then
overwritten does not. Both this contract and the LIVE shell write to the
same compositor, and the running Panama re-applies its own preferences
on any store change -- landing exactly the values that were being
mistaken for "the write never happened".
So the apply is re-issued periodically while waiting, which makes the
test survive being overwritten without weakening what it asserts, and
the failure message now distinguishes the two cases instead of
describing both as a write that never arrived.
The wait is also 10 seconds rather than 4. The write path verifies every
option by reading it back and retries a refused batch, so a loaded
machine legitimately takes longer -- and this runs in a suite alongside
other tests driving the same compositor.
Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L
Gabriel Brown
5562323eb8