What
A non-interactive session is a run with no screen to type into, such as a scripted run. When you use a slash command that does not exist in one, Claude Code replies "Unknown command: /x. Did you mean /y?". That reply is now built as a user message and carries commandOutcome: { kind: "unknown", suggestion }, which records the unknown command and the suggestion.
Why
The outcome of a mistyped command is now recorded in a structured form instead of existing only as text.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding does not say where this outcome record can be read.