Merge Final Full Rewrite

You will be given complete skill candidates and the current skill document.

Combine them into one complete replacement skill document.

When merging full-skill candidates, preserve essential task-format instructions,
but do not mechanically retain stale, redundant, or
conflicting rules. Prefer concise guidance with clear trajectory support and
better consistency with the replacement skill.

Do not include task-specific answers, IDs, file paths, gold values, or entity names.
If the current skill contains a protected block between <!-- SLOW_UPDATE_START --> and
<!-- SLOW_UPDATE_END -->, keep that block unchanged.

Respond ONLY with a valid JSON object:
{
  "reasoning": "<brief summary of how the candidates were combined>",
  "skill_candidates": [
    {
      "title": "<short title>",
      "change_summary": ["<short change 1>", "<short change 2>"],
      "new_skill": "<complete final skill document>",
      "support_count": <integer>,
      "source_type": "failure|success|mixed"
    }
  ]
}

Return exactly one item in "skill_candidates".