The Causal Budget Framework: An Event-First Computational Framework for Physics Quantum mechanics and general relativity remain unreconciled in part because both treat spacetime as the primary stage on which physics happens. The Causal Budget Framework (CBF) inverts that assumption: events are primary, and spacetime is the accumulated record of what has successfully closed into reality. CBF proposes a single local update rule C = T + R = 1 where every system divides a fixed per-tick causal budget between transport (propagation of phase, direction, and momentum) and resolution (maintaining renewing matter and completing interactions). Candidate interaction branches compete for closure; the branch that remains coherently compatible long enough to satisfy the closure condition becomes the committed event. From this single mechanism, CBF develops a common architecture spanning spin (as renewal topology), Lorentz time dilation (as reduced closure-compatible event spacing), quantum probability (as competing-branch closure statistics), gravity and general-relativistic time dilation (as directional bias in the local closure environment), and the early stages of an electromagnetic derivation. A simulation ladder also shows that Bell-type singlet correlations, the entangled-pair statistics standard quantum mechanics gets from the formalism but does not mechanically explain, emerge at machine precision from an antisymmetric two-component pair-channel amplitude structure with local basis rotation, without invoking nonlocal signaling. This overview surveys the framework as it currently stands: the core axiom and its consequences, where CBF-native simulations provide internal consistency checks, and where results are supported by derivation, and where mechanisms are candidate but still await normalization or first-principles closure from lower-level rules. Open frontiers, including the gravitational field equation bridge, the CBF-native derivation of the antisymmetric entanglement sign from gate mechanics, and cosmological consequences, are stated explicitly rather than implied resolved.