Module graft 

The graft phase’s decisions: whether it runs, what it is told, and whether its result is small enough to keep.

Between the tally and the review loop a fixer round ports the strengths the judges attributed to the losing candidates onto the winner (graph::Runner::graft). Everything that can be decided without I/O lives here so the skip conditions and the size valve are unit-tested directly.

Structs

Plan

What a graft round is asked to port, by label only.

Enums

Skip

Why the graft phase did nothing. The wording is the run event.

Constants

INTERRUPTED

The reason a record in a non-final state is rolled back on resume.

MAX_LIMIT

Largest line budget a graft gets, however large the winner is.

MIN_LIMIT

Smallest line budget a graft gets, however small the winner is.

RATIO

The graft may change at most one RATIOth of the winner’s own diff.

Functions

limit

The most changed lines a graft may add to a winner whose own diff against the base is winner_lines: a quarter of it, never under MIN_LIMIT and never over MAX_LIMIT. A quarter keeps the graft a supplement; half would let it turn the winner into something else.

plan

Decide whether the graft runs and with what input. Pure.

requested

The strengths of a plan with the ids the prompt shows (A1, A2, …).

within_budget

Is a graft that changed lines (None: not measurable, or binary) within limit? An unmeasurable change is rejected.