Function learn_in 

pub fn learn_in(
    home: &Path,
    session: Option<&str>,
    ask: &dyn Fn(&str) -> Option<Value>,
    track: bool,
    now: i64,
) -> (usize, usize, usize)

learn_pending on the store in home. With track, outcomes of asked lessons are recorded (outcome.rs): a merge into a lesson asked earlier in the episode’s session, and a lesson asked earlier that the new one supersedes, are asked_then_corrected (outcome::contradicted); at the end of session, and in every session idle for outcome::IDLE_MS at now, the other asked lessons are asked_not_corrected. So any run settles, not only the end hook’s; a session it skipped episodes of is not settled as idle. Only a “not a lesson” verdict is recorded as skipped: an episode whose model call failed stays waiting (and its session unsettled) for the next run, and after MAX_FAILURES failures in a row the run stops asking. Returns (new lessons, merges, episodes still waiting for a verdict).