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Adjust DAI Metrics File

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Nucleic-Session: E357FC5A-6454-41EE-9AA8-139CDB6779DA
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Nucleic
2026-06-27 14:26:04 -07:00
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@@ -289,7 +289,7 @@ Both can store the heartbeat; they answer different questions.
| Ops & cost | schema-less, fire-and-forget, very cheap/generous free tier | schema + migrations + storage growth; still cheap, more to run | | Ops & cost | schema-less, fire-and-forget, very cheap/generous free tier | schema + migrations + storage growth; still cheap, more to run |
| Best at | "how many DAI per day, split by platform/channel/version" — the headline metric | exact retention/cohort/funnel analysis | | Best at | "how many DAI per day, split by platform/channel/version" — the headline metric | exact retention/cohort/funnel analysis |
**Decision: start with AE.** It nails the headline DAU metric, auto-expires, stores no IP, and **Decision: start with AE.** It nails the headline DAI metric, auto-expires, stores no IP, and
keeps the smallest identifier footprint — the right fit for a local-first, privacy-respecting app. keeps the smallest identifier footprint — the right fit for a local-first, privacy-respecting app.
Reach for D1 (or add it alongside) only when you specifically want exact retention/cohort Reach for D1 (or add it alongside) only when you specifically want exact retention/cohort
analysis; the two aren't mutually exclusive, but there's no reason to carry D1's retention analysis; the two aren't mutually exclusive, but there's no reason to carry D1's retention