Specialist skill for Architecture Decision Records (ADRs) in an Obsidian vault. Normally invoked by the obsidian-documentation orchestrator. Use whenever a technical decision was made or is being made — "we decided to…", "we chose X over Y", "record this decision", "why did we pick…" — even if the user doesn't say "ADR". Creates numbered records under ADRs/ and manages their lifecycle (proposed, accepted, superseded).
