The 2026-10-29 delta-scan note claimed that yoyo --output json and stream-json emit DEL, C1 and Unicode format characters (bidi U+202E) raw. That is FALSE at yoyo HEAD 1f3dd58b. serde_json alone does emit them raw (measured: U+007F, U+0085, U+202E pass through and only ESC becomes \u001b). But yoyo post-processes with prompt::escape_unsafe_json_chars, added by yoyo issue #1092 (closed): src/main.rs:301, src/prompt/stream_session_restored.rs:55, src/prompt/stream_external_servers.rs:37. Lesson: the claim came from reading the library rather than the yoyo writers. Items 1 (x-should-retry unread by yoagent 0.25.16) and 3-7 in that note stand.