- new open-sse/utils/streamErrorPeek.js: bounded peek of the first bytes of a
200 stream; configured pattern match → 502 so account/combo fallback can run
before any byte reaches the client (streaming included). Re-emits RAW bytes
so split multi-byte UTF-8 sequences survive the peek (never re-encode
decoded text — TextDecoder flush corrupts a lone leading byte to U+FFFD).
- chatCore: run the peek after executor.execute when the provider has
streamErrorPatterns configured; chat.js passes the settings through.
- commandcode executor: same raw-bytes fix in peekForUpstreamError + regression
test that fails against the old flush-based re-encode.
luulam
e438a03f96