Function record_shell_outcome 

pub fn record_shell_outcome(command: &str, output: &str, exit_code: i32)

Shell-layer hook: learn from a finished command’s outcome.

Gated to build/test/run command families via is_correlatable_command so ordinary commands never touch disk. Resolves the project root and a stable session id internally, keeping the call site (a single line in shell::exec) minimal. Never panics and never blocks the shell on lock contention.