Bump actions to drop Node 20 deprecation warnings#4
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GitHub started warning that Node 20 actions will stop running by Sept 2026 (forced to Node 24 by default June 2026). - actions/setup-node v4 -> v6 (composite step) - actions/setup-python v5 -> v6 (composite step) - astral-sh/setup-uv v4 -> v8.1.0 (composite step; v8 has no floating major tag, hence the explicit pin) - actions/checkout v4 -> v6 (workflow YAMLs)
Caught during /pr-review: v2 still uses node20, so release.yml would still emit a deprecation warning despite the rest of the bump. v3.0.0 (2026-04-12) is a runtime-only swap to node24 with no behavior changes per upstream release notes.
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Summary
GitHub started warning that Node 20 actions will stop running on the runner by Sept 2026 (Node 24 becomes the default June 2026). Caught the warnings on synapse-research's v0.2.0 release run; the deprecated actions live in this composite action's transitive dependencies.
actions/setup-nodev4 → v6 (composite step)actions/setup-pythonv5 → v6 (composite step)astral-sh/setup-uvv4 → v8.1.0 (composite step; setup-uv doesn't publish a floatingv8major tag — verified against their git refs, hence the explicit pin)actions/checkoutv4 → v6 (acrossrelease.yml+test.yml)Test plan
gh api repos/<owner>/<repo>/releases/latest: setup-node v6.4.0, setup-python v6.2.0, setup-uv v8.1.0v2.xafter merge so consumers usingmcpb-pack@v2pick this up automatically