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gate-check

Find the decisions in a pipeline that do not need the expensive model and propose the gate for each: a rule, a classic classifier, or a small model, with fail-closed routing. Use when the user asks to cut model costs or latency, says the big model handles everything, or wants a triage / routing / filter layer in front of an agent. Analysis plus an optional baseline scaffold. Do NOT use for auditing context layout (context-audit) or for building eval suites (evals-bootstrap).

plugins/agents-course/skills/gate-check/SKILL.md

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# Find the gates

Theory: [Cheap decisions](https://secondbrainos.dev/#/read/course-3-gate/cheap-decisions)
and [Gate practice](https://secondbrainos.dev/#/read/course-3-gate/gate-practice).
An agent does two kinds of work: it writes, which needs a big model, and it
decides — is this spam, which queue, does this need a person — which is a
bounded question the answer to which comes from a set you already know.
A gate is a cheap decision layer that sorts the stream so the expensive
model only sees the items that actually need judgement.

## Workflow

1. **Map the decisions.** Read the pipeline's entry points and prompts and
   list every decision made before or during a model call: classification,