arkazhuo/compactionrl-agent-rl/mechanical-refactor-verify

#!/usr/bin/env python3
"""Reproducible transform for: <describe the mechanical move>
Run from the repo root:  python3 /tmp/transform_<short_description>.py
"""
import sys
from pathlib import Path
sys.path.append(".claude/skills/mechanical-refactor-verify")
from mechanical_refactor_verify_utils import verify_mechanical_refactor, exec_command, git_add_and_commit, dedent
BASE_COMMIT = "<base_sha>"
TARGET_COMMIT = "<pr_mechanical_move_final_sha>"
def transform(dir_root: Path) -> None:
    """Perform the mechanical transformation and commit each step.
    Args:
        dir_root: Path to the worktree (checked out at BASE_COMMIT).
    """
    # --- Step 1: Extract functions by line range ---
    source = dir_root / "path/to/source.py"
    content = source.read_text()
    lines = content.splitlines(keepends=True)
    # Move lines 100-150 to new file, dedenting from method to top-level
    extracted = "".join(lines[99:150])
    extracted = dedent(extracted, 4)  # remove class indentation
    # Minimal adaptations: self.x -> x (parameter)
    extracted = extracted.replace("self.args", "args")
    target = dir_root / "path/to/pkg/target.py"
    target.parent.mkdir(parents=True, exist_ok=True)
    target.write_text("import logging\n\n\n" + extracted)
    # --- Step 2: Remove extracted lines from source, add import ---
    # Delete lines 100-150 from source
    new_lines = lines[:99] + lines[150:]
    source.write_text("".join(new_lines))
    # Small targeted replacement: add import, replace call site
    content = source.read_text()
    content = content.replace(
        "from path.to.old import foo",
        "from path.to.old import foo\nfrom path.to.pkg.target import extracted_func",
    )
    # Replace inline code with function call (use a short unique anchor)
    content = content.replace("old_call_pattern", "new_call_pattern")
    source.write_text(content)
    git_add_and_commit("mechanical: extract functions", cwd=str(dir_root))
    # Note: pre-commit run --all-files is run automatically after transform() returns
if __name__ == "__main__":
    verify_mechanical_refactor(
        base_commit=BASE_COMMIT,
        target_commit=TARGET_COMMIT,
        transform=transform,
    )

cd <repo_root>
python3 /tmp/transform_<short_description>.py
# Expected: "PASS: transform reproduces the commit exactly."

# 1. Create gist (or update existing)
gh gist create --public -d "Mechanical refactor transform: <description>" /tmp/transform_<short_description>.py
# Or update: gh gist edit <gist_id> -a /tmp/transform_<short_description>.py
 
# 2. Delete local file
rm /tmp/transform_<short_description>.py
 
# 3. Update PR description (paste the block below)

## Mechanical Move
 
Transform script: <gist_url>
 
### One-click verification