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Marc-André Bombeck
a8b0365ca5
The cookie was the Session row's cuid. cuid is built for collision- resistant identity across distributed writers, not for unguessability — it encodes a millisecond timestamp and a process-local counter and never touches a CSPRNG. A session cookie is a bearer credential and has to be unguessable, so it now carries 32 random bytes and only the HMAC of that value is stored, matching how api_tokens and refresh_tokens already hold their secrets. Compatibility is passive, and deliberately so. A backfill cannot help: the cookie already sitting in a browser is the cuid, and nothing we generate server-side can be pushed into it — backfilling would sign everyone out at deploy. Upgrading a row in place on first use loses to the parallel requests a single page load fires: each mints its own secret, one write wins, and the losers cannot re-emit the winner's secret because only a hash is stored, so the browser can end up holding a value the row does not honour. Instead, rows minted before the column keep a NULL token_hash and stay resolvable by id, and are denied the sliding-expiry extension so they drain within the 30-day session lifetime. Every login from this release forward is on a secret at once, and an id stops authenticating the moment its row holds one. Note for operators: API_TOKEN_HMAC_KEY now also keys session cookies, so rotating it signs browser sessions out as well as invalidating tokens. It is already Core-required, so no deployment gains a new prerequisite.
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/— backup / restore + encryption-key-rotation playbooks. These are the runbooks 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.migration/— release-by-release migration notes. Read the entry for the version you're upgrading from.audit/— per-release audit summaries archived for forensic traceability.apple-store-connect-checklist.md— the iOS submission gate.doctor-report.md— PDF generator design notes.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.