Finalizing a candidate never moves or retypes a placement, so preference
results and calendar optimizations already have their final values before
it, and leave-balance optimizations do too when nothing can be earned.
Reject a candidate before finalizing when the first differing such
objective of the protected prefix is worse than the baseline. Leave-placement
objectives and earning contexts stop the walk.
The frozen-engine check now also compares cancelled asynchronous runs,
including checkpoints and retained incumbents. The loaded year drops from
48.5 s to 44.3 s; outcomes, explanations and final states are unchanged.
Refs #284
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Cache an immutable occupancy per placements map and derive a candidate's
time-off period groups, holiday-week completeness and placement tie key
from its parent when one date is added or removed. The from-scratch
computation stays as the test oracle and an opt-in shadow mode. A
fast-check property test compares both after every operation.
The loaded year drops from 66.5 s to 48.5 s and the protocol from 262.0 s
to 193.7 s. Outcomes, explanations and final states stay identical.
Refs #283
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Move time-off periods, work sequences, public-holiday weeks, balance
observations, the placement list and both tie keys into
plan-observations.ts. The code moves without behavior changes; all seven
benchmark scenarios produce byte-identical outcomes, explanations and final
states, and the frozen-engine check passes. Benchmark timings stay within
noise.
Refs #282
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
nessarandClaude Opus 5.5