Planning

Large prompts drift when they do deterministic work themselves. Determinism Injection hands that work to tools instead so that the prompt stays the orchestrator, and binaries handle the lookups, state transitions, and writes.

Evidence-based iteration on the RDR specification-first workflow: indexing research and Claude Code sessions in Arcaneum to mine and formalize the patterns I was already applying by hand.

17 RDR postmortems, 208 drift instances, one meta-lesson: specify interfaces not implementations, verify APIs against source code, and plan for the full scope including Day 2 ops.

Introducing RDRs - specification documents that evolve during planning to prevent purpose drift and wasted implementation effort.