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SYSE.30:3 - Forces
| Force | Practical tension |
|---|
| Reconstruction | Recording more inputs helps recovery; irrelevant detail increases maintenance and hides the inputs that actually change output. |
| Fast builds | Caches reduce delay but can hide an undeclared dependency or a build that never ran. |
| Byte identity | Strict comparison detects unexplained variation; some outputs deliberately contain separately varying operational information. |
| Availability | Pinned inputs stabilize meaning, but a version name is not enough when its bytes later disappear. |