How context is added automatically
Heart rate, HRV and your calendar load are silently attached to every entry — giving future-you the full picture of how you actually felt.
What gets attached
Each entry quietly picks up your heart rate and heart-rate variability from around the moment you recorded, plus how meeting-dense those hours were and, if you allow it, time spent in daylight. You never type any of it.
Why it matters
It is what lets Cairn tell apart two entries that read the same. "Fine, just tired" on a calm body and the same words on an elevated one are different days, and only the biometrics know which is which.
What is not collected
No GPS trace, no event titles beyond a single word, no continuous health monitoring. Cairn reads a narrow window around each entry and nothing between them.