Connection status: token expiry, granted scopes, whether the local config and token files exist and are private. Returns no health data and no absolute paths.

Sleep and physiology context for a timed event on a given day (a test, a flight, a race): the preceding night (bedtime, wake, duration, lowest HR and when), hours awake at the event, hours since the nightly HR trough, sleep vs 30-day median, readiness and temperature deviation.

Computed chronotype from main sleep periods: median/IQR bedtime, wake and midpoint; weekday vs weekend; regularity (SD of midpoint); midpoint shift vs a ~03:30 population reference; day-by-day phase series (useful across travel).

Per-night summaries (main sleep and naps): bedtime, wake, midpoint, hours, efficiency, latency, lowest HR and its time, average HR/HRV/respiratory rate, temperature deviation. Optional 5-min HR curve (limits range to 31 days).

Nightly temperature deviation with a sustained-shift detector: baseline mean, shift day, elevated-phase mean, amplitude, duration, and a flag when the current elevation has outlasted the expected duration. Heuristic; parameters exposed and the raw series returned so the decision is auditable.

Compact daily table: readiness score, sleep score, activity score and steps, stress summary, SpO2 average, nightly lowest HR, average HRV, temperature deviation.

User-entered tags (e.g. alcohol, travel, illness, custom) with day, times and comments.

Baseline drift: nightly lowest HR, average HR, HRV, respiratory rate and temperature deviation over the last window nights vs the preceding baseline, with deltas, z-scores and flags. Interpretation is left to the caller.

Write CSVs (sleep, daily, temperature, tags) for a date range into a directory under your home folder. Local disk only.