The performance comparison summary previously stated it compared against
"its pull request base branch (e.g., 'master')" regardless of the actual
base branch.
Plumb the base branch classification computed in prepare.js through the
eval workflow to the `compare` derivation so the summary names the real
base branch (e.g. "staging-25.11"). The local `eval.full` helper defaults
to "master", matching its touched-files convention.
Assisted-by: claude-code with claude-opus-4-8[1m]-high
Aliaksandr
a100d091a0