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Marc-André Bombeck
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Upload the ZIP the Android Health Connect app writes and import its `health_connect_export.db` in the background, the same way an Apple Health export is imported: streamed to disk with a SHA-256, capped at 1 GiB, one import per account, a job row of kind `health_connect` that the shared reconcile cron and staging sweep now look up on its own queue. The worker extracts the database (4 GiB ceiling, zip-bomb checks) and opens it read-only with `immutable=1`, `trusted_schema=OFF` and `query_only`. A view in place of a record table refuses the file, columns are found by name, and schema versions below 9 are refused. Records are read in batches of 500 and aggregated in SQLite: steps, energy and distance as one total per day from the app the person's Health Connect priority list ranks first, heart rate per minute for 90 days and as hourly means before that, sleep stages with the unknown stage counted only in sessions without real stages, workouts, cycle days, water and micronutrients. Apps whose integration the account has connected are left out, and a reading already stored under another source is skipped. Rows carry source HEALTH_CONNECT, `hc:<uuid>` or the `stats:` ids, so a second import of the same export writes nothing. Both staged files are removed on every way out; the job result holds counts per type and per app only. Settings gain a Health Connect card with the export steps, progress and the outcome, in all seven languages, and the import is documented in docs/integrations/health-connect.md.
docs/ — internal reference + operator playbooks
The user-facing documentation lives at https://docs.healthlog.dev — that's the canonical surface for self-hosting guides, integration walkthroughs, AI-provider setup, and the doctor-report workflow.
The files in this directory are the internal operator playbooks, audit notes, and machine-readable specs that ship alongside the source:
api/— the OpenAPI 3.1 spec for the native-client subset (iOS DTO codegen target). Seeapi/README.mdfor the preview commands. Also home to the MCP-server contract:api/mcp-capabilities.md(tools, resources, prompts, write model) andapi/mcp-skills.md(building a connector / skill).ops/— operator runbooks: deploy, backup / restore, encryption-key rotation, password reset and account recovery, env checks, TLS pinning, data repair. These are what an operator reaches for during an incident.self-hosting/— horizontal-scaling notes (HEALTHLOG_PROCESS_TYPE=web|worker|all) and the deploy-pipeline recipe. Routine install steps stay ondocs.healthlog.dev. Includesself-hosting/mcp.md— enabling the off-by-default MCP connector and pointing Claude.ai / ChatGPT / Claude Desktop at it, andself-hosting/sso.md— OIDC SSO login: IdP setup, the identity-pinning security model,OIDC_ONLYconsequences, and the break-glass runbook. Alsoself-hosting/geolite2.md— bringing your own offline GeoLite2 databases viaGEOLITE2_DIRinstead of sending login IPs to a third-party lookup. Andself-hosting/account-sharing.md— letting one account on the instance open another's health record: the three access levels, the eight sections a grant can be narrowed to, managed profiles for somebody with no login and the guardians who look after them, what revocation does and does not undo, and which trust properties of the instance are unchanged by any of it.migration/— migration notes. Currently only v1.3 to v1.4; later releases are covered byCHANGELOG.mdand https://docs.healthlog.dev.integrations/— per-integration reference (Withings, Fitbit, Google Health, WHOOP, Apple Health, AI providers, data import).adr/— architecture decision records.security/— threat-model notes.diagrams/— architecture diagrams rendered through docs.healthlog.dev.releases/— release imagery.apple-store-connect-checklist.md— the iOS submission gate.codex-protocol-spec.md— Codex / ChatGPT OAuth protocol reverse-engineering notes.ui-guidelines.md— UI / a11y house style.
If you're a self-hoster looking to spin up an instance, start at https://docs.healthlog.dev or jump to the Quick Start in the project README.