irisandClaude Opus 5
446fb92ba3
A misspelled field was accepted and dropped. Sending `permission_mode` instead of `permissionMode` produced a 200 and a session running in the default permission mode -- so the caller's setting was gone, and nothing anywhere said so. That is the expensive shape: indistinguishable from success at the place you are looking. It cost an hour here, chasing a "startup race" that was a key serde had silently discarded; with the name spelled the way the API asks, a bypassPermissions session runs a `sleep` loop with no prompt at all. So every request body refuses unknown fields, not just the one that bit. Axum's message names the offending field and lists what was expected, which is the whole of what the caller needs. Query strings are deliberately left permissive: a stale link carrying an extra parameter is not a mistake worth failing a request over. 53 tests, clippy and rustfmt clean; verified against the running server that the misspelling is now a 422 naming the field and the correct spelling still spawns. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>