Darkmatter TypeScript toolchain

Org-wide contract for TS repos (platform, nixmac-web, and friends). The stack is deliberate; substituting familiar defaults (npm, jest, wrangler) creates a second convention and breaks CI.

Apply codebase-design for readability and module boundaries. Toolchain checks support cohesive implementations and small public interfaces; function length alone does not determine whether a helper belongs.

Ops scripts — TypeScript, not bash

If the repo is TypeScript-only, utility and CI scripts are TypeScript (scripts/*.ts, bun scripts/ci.ts). Do not add .sh files. See ADR-0012.

Package management — Bun only