01
Baseline before change
Know the installed/source/configuration state and confidence before intervention.
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Reliable handover is a design requirement.
The source, configuration, requirements, interfaces, tests, release decision, recovery path and residual risk should remain intelligible after the original developer leaves the room.
02
Requirements before preference
Architecture choices trace to an operational, lifecycle or assurance need.
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Evidence before adjectives
Claims retain status, limitations, acceptance basis and residual risk.
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Deterministic authority
Safety and machine-control ownership remain explicit around data and AI.
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Reviewable releases
Source, dependencies, tests, defects and approvals identify the accepted system.
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Recoverable lifecycle
Backups, rollback, diagnostics, access and obsolescence survive handover.
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