[xiehuanyi]

The accumulator-copy rule now supports requireArrayReceiver: true, using the existing local array evidence helper before classifying a reduce/ reduceRight callback. A custom one-call API can avoid the growing-array warning, while known array literals, aliases and typed array chains remain covered. The default method-name heuristic stays compatible and is now documented.

Fixes #50, using the report's suggested documented heuristic plus an option requiring recognized array evidence.

Validation: the custom-receiver regression fails before the behavior change; seven new regression/control cases and all existing rule suites pass. pnpm check (lint, full tests, typecheck, synchronized skill asset check) and git diff --check pass. Independent review passed. The vendored skill payload was regenerated with pnpm sync:skill-assets.

AI-assisted implementation and wording.

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[xiehuanyi]

Following up on #50: requireArrayReceiver: true avoids the warning on custom one-call reducers while retaining coverage for recognized arrays. The default heuristic remains compatible and is documented. The original regression checks and pnpm check passed, including the synchronized skill assets. CI still shows action_required. Could you review the option and approve the CI run when convenient?