feat: per-stage runtime configuration#56
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markhedleyjones merged 3 commits intomainfrom Mar 26, 2026
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Stages can now override or extend the global runtime block by adding a runtime section within the stage definition. Scalar fields (network_mode, privileged, ipc, shell) are overridden by the stage value. List fields (volumes, devices, features) are appended. This allows development-only volumes, network modes, and features without affecting production. cm run resolves the effective runtime for the development stage; run.sh resolves for the production stage.
Changed privileged from bool (default False) to Optional[bool] (default None) so that a stage-level privileged: false can override a global privileged: true. Previously the truthiness check skipped False values.
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Stages can now override or extend the global runtime block by adding a runtime section within the stage definition. Scalar fields (network_mode, privileged, ipc, shell) are overridden by the stage value. List fields (volumes, devices, features) are appended.
This allows development-only volumes, network modes, and features without affecting production. cm run resolves the effective runtime for the development stage; run.sh resolves for the production stage.