Closes the 'refactoring-only endpoint too narrow' risk flagged by the
cross-family rubber-duck. Adds two boundary stimuli never used in trim tuning:
9. Separate a smuggled behavior change from a requested rename (rename +
smuggled 10%->12% discount change) -> should separate/flag, not bundle.
10. Recognize a behavior-changing simplification is not a refactor (remove
free-shipping-over-\ rule under a 'cleanup' framing) -> should not
silently change observable behavior.
Executor reverted to claude-opus-4.6 / judge gpt-5.5 (re-judge) to match the
stringent Confirm A family where boundary behavior looked weakest.
Eval-branch only; not on PR #873.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 3c9f9823-7f2f-4f7d-9d1b-f2b9e7a20c60
Robustness probe for the csharp-refactoring trim: all prior CI trajectories
were executed by claude-opus-4.6. Flip executor to gpt-5.5 (GPT family) and
CI judge to claude-opus-4.8 so the (executor, judge) pair stays cross-family.
Tests whether trimmed-vs-current non-inferiority holds under a different model
family. Eval-branch only; not on PR #873.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 3c9f9823-7f2f-4f7d-9d1b-f2b9e7a20c60
Rewrite the 'not behavior-preserving' escalate bullet so an explicitly
requested bug fix or feature is completed via normal development (not
refused / 'nothing to change'), addressing the one scenario where v1
regressed. Bump experiment runs 3->5 to tighten the aggregate CI.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 3c9f9823-7f2f-4f7d-9d1b-f2b9e7a20c60
Trim study for PR #873: csharp-refactoring-trim is a ~30% shorter rewrite of csharp-refactoring (drops When-to-use/Inputs/Outputs boilerplate + verbose LSP launch prose, compresses the dbc-overlapping hazards section) while preserving every rubric-rewarded behavior. Adds a 'trimmed' experiment arm and bumps runs to 3 so CI generates baseline/skilled/trimmed trajectories for local cross-family re-judging. Eval-only scratch branch; not part of the PR.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 3c9f9823-7f2f-4f7d-9d1b-f2b9e7a20c60
Abhitej John