regression-gate — Eval Set + Metric + Threshold, Wired Into CI

"Every subsequent change must be gated on these numbers." — Synthesized from [[llamaindex]] Stage 2 (eval loop before optimizing) [llamaindex-sop-skill/SKILL.md:114-126]

"Compiled program beats baseline on a held-out test set (not the val set used in optimization)." — [[dspy]] Stage 3 exit criterion [dspy-sop-skill/SKILL.md:101]

This is an enhancement overlay. The regression-gate SOP exists only as fragments scattered across base skills — [[llamaindex]] OP-10 EvalLoop ("gate every change"), [[dspy]] train/dev/test split + metric — and is never assembled as a standalone cross-framework discipline. It is the discipline that turns a one-off eval into a gate: a test suite that runs in CI on every prompt/model/retriever change and fails the build on regression. It consumes a metric from [[agentsop-metric-design]] and, for domain-specific held-out sets, hands off to [[agentsop-domain-eval-set]].

1. 何时激活 (When to Activate)

Activate when any of these is true: