[AlbinoGeek]

needs = [..] per gate: a gate starts after the gates it names pass; a failed, timed-out or skipped need skips it (SKIP ... needs ), the failing gate's exit stays the verdict; unknown names and cycles (including through serial chains) refuse the file (exit 129); a need outside the current run is ignored, so gate run lint still works alone. Shown in --list and --json.

Why: go-* repos start lint, fmt, vuln and lint-windows together, and on a cold build cache each go tool builds the same binaries at once. Measured on go-safefs, full gate -q, GOCACHE wiped per cold run, 6 runs each: cold median 27.6s today vs 15.5s with a tools gate and needs = ["tools"] (-44%); warm 0.99s vs 1.10s. Tests run real shell gates through Run: ordering, failed-need skip, unknown name, cycle, absent need.

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