magpie-release-rc-cut

<!-- SPDX-License-Identifier: Apache-2.0 https://www.apache.org/licenses/LICENSE-2.0 --> <!-- Placeholder convention (see ../../AGENTS.md#placeholder-convention-used-in-skill-files): <project-config> → adopter's project-config directory path <upstream> → adopter's public source repo (e.g. apache/airflow) <version> → release version string (e.g. 2.11.0) <rcN> → release candidate suffix (e.g. rc1) <version>-<rcN> → fully-qualified RC identifier (e.g. 2.11.0-rc1) <release-branch> → branch the prep PR targets (e.g. main) <staging-url> → URL to the staged RC artefact directory <planning-issue-url> → URL of the release planning issue on <upstream> Substitute these with concrete values from the adopting project's <project-config>/release-management-config.md and <project-config>/release-build.md before running any command below. --> # release-rc-cut This skill emits the paste-ready command sequences that cut an RC: tag the release commit, build artefacts, sign each artefact, generate checksums, and stage to the adopter's distribution backend. It is Steps 4–5 of the [release-management lifecycle](../../docs/release-management/process.md). **The skill writes nothing to disk and runs nothing locally.** Every command sequence in the output is executed by the Release Manager on their own machine, with their own signing key, under their own ASF credentials. This satisfie...