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ADR 0004 — Privacy-first, opt-in telemetry in adapters only

Status: proposed · 2026-11-07

Decision

The core never performs network I/O (enforced by cargo deny). Any usage statistics are opt-in, live in adapters, follow an explicit allow-list that excludes all financial data, and are designed in public before implementation. See docs/en/project/telemetry.md.

Consequences

  • Analysts and companies can adopt Fairmark without data-protection concerns. − Usage insight comes mostly from public signals (PyPI, crates.io, GitHub) until opt-in data grows.