Xiao_no_love/Starlight_Lancher_animation_up
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Starlight_Lancher_animation_up/apps/telemetry-worker/README.md

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Starlight telemetry worker

This Worker accepts only opted-in launcher heartbeat batches. It stores anonymous usage metadata in D1; error reports and error context are not accepted or persisted.

Provisioning

pnpm exec wrangler d1 create axolotl-telemetry
pnpm exec wrangler secret put INSTALLATION_HMAC_SECRET
pnpm exec wrangler d1 migrations apply axolotl-telemetry --remote

Replace database_id in wrangler.toml and keep the Worker on the Free plan. The production custom domain is declared in wrangler.toml. Configure Cloudflare usage notifications at 50%, 75%, and 90% for Workers and D1. Do not enable Workers Paid.

Clients that still have queued error reports receive 400 error_reporting_disabled; the payload is not logged or stored. Upgrade clients should discard their local error outbox.

Storage design

D1 stays within the Free plan's daily limits (5M rows read / 100k rows written) by avoiding per-event aggregation triggers:

  • daily_active inserts feed wau_seen / mau_seen / daily_active_dims through a single lightweight trigger for O(1) WAU/MAU and distribution reads.
  • A nightly cron (runMaintenance) refreshes usage totals, rolls the active windows, and applies usage-data retention. Legacy error tables remain in the schema for migration compatibility but are no longer written.

Schema changes are forward-only migrations in migrations/; never edit an applied migration.