Architecture decision records

The durable spec: decisions are recorded before code, and superseded rather than edited (ADR-0001).

• ADR-0001: Record architecture decisions
• ADR-0002: Six seams, and an intent-based, MCP-first API
• ADR-0003: Stable entity identity (the topological-naming fix)
• ADR-0004: Text is source, geometry is a build artifact
• ADR-0005: Three-tier test corpus (invariants over snapshots)
• ADR-0006: Agent feedback loop — autonomy tiers and circuit breakers
• ADR-0007: Privacy-preserving bug reduction
• ADR-0008: The Part standard — one unit across all domains
• ADR-0009: Interface-semver and the lockfile
• ADR-0010: Atomic components and the parts registry
• ADR-0011: Night Shift — scheduled autonomous work sessions
• ADR-0012: Contribution without platform accounts — the relay
• 0013. Sketch constraints: solved at authoring time, never at build time
• 0014. Exploded views are projections; mates get semantics before a solver
• 0015. A type system for hardware: interfaces carry envelopes, connections type-check
• 0016. Branch-and-merge design exploration: semantic 3-way merge
• 0017. File naming: .gitcad is the product, extensions are roles
• ADR-0018: gitcad-native B-rep kernel, from scratch, oracle-verified
• ADR-0019 — Certified intervals: the K3 extension to the exactness charter
• ADR-0020 — forge is the sole geometry kernel; OCCT is removed
• ADR-0021 — one canonical B-rep; representations become constructors
• ADR-0022 — A feature layer above the kernel, and `Body` as the only public return type
• ADR-0023 — certified angles for trimmed quadric faces
• ADR-0024 — the `sampled` provenance tier