## spec-117 — Harness Engineering Root Refactor Program

**Branch**: `main`. **Status**: done.

Multi-track program (hx-01..hx-12) covering control-plane normalization, work-plane and task-ledger, mirror-local reference model, harness-kernel unification, state-plane and observability normalization, multi-agent capability contracts, context packs and learning funnel, runtime-core extraction (tracks A/B/C), verification-and-eval architecture, and engineering standards / legacy retirement. Sub-spec details and progress live under `.ai-engineering/specs/spec-117-progress/`. Verification-and-eval (hx-11) added the replay-outcome and pass@k library functions referenced by spec-119; spike documented in `spec-119-progress/spike-spec-117-funcs.md` clarifies that the named functions were never produced and lands the SSOT under spec-119 instead.
