no-yielded-match

Intent: inside an Effect generator, return early on the empty or failed case instead of yielding a match.

// ❌ no
const save = Effect.fn("save")(function* (id: PolicyId) {
    const found = yield* findPolicy(id)
    return yield* Option.match(found, {
        onNone: () => register(id),
        onSome: (policy) => update(policy),
    })
})

// ✅ yes
const save = Effect.fn("save")(function* (id: PolicyId) {
    const found = yield* findPolicy(id)
    if (Option.isNone(found)) return yield* register(id)

    return yield* update(found.value)
})

Trigger: yield* of Option.match(x, {…}) or Result.match(x, {…}) (v3: Either.match), or of a x.pipe(…)/pipe(x, …) ending in one of them, in the generator of Effect.gen or Effect.fn.

Exemptions and blind spots: an Option.match with onNone → Effect.fail(…) and onSome → Effect.succeed: see option-match-to-from-option (effecttsgo). A handler that no-nested-match reports. Matches not yielded directly (assigned first, or inside Effect.flatMap) slip through.

Why: the match splits the generator into two equal-weight branches; a guard clause leaves one main path of yield*.

Options: none

Fix: none