sim.test.ts 698 -> 175 and director.test.ts 315 -> 178, into four new
modules. 160 tests passing before and after.
sim.ts and types.ts are reverted. sim.ts's exported step() calls
survivorStep, which any seam moves out - 63 tests failed with a
ReferenceError while tsc reported only unused imports. types.ts has its
difficulty tables below the type declarations that use them.
Third project now where a TypeScript seam compiles clean and fails at
runtime. In TS, tsc does not tell you a split worked; the test run does.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
