explain-diff

Translate a DriftReport JSON into a plain-English markdown narrative suitable for pasting into a PR description, chat thread, or bug report. Read-only template render — no LLM call, no filesystem mutation. Pairs with `doctor` via the `--explain` flag, or runs standalone against any DriftReport produced by `bin/compute-drift.sh` / `bin/retrofit.sh --json` / `bin/doctor.sh --json`. TRIGGER when the user says "explain the drift", "summarize doctor in plain English", "what does this drift report mean", "narrate the drift", "translate the drift report", "human-readable drift", "explain what nyann found", "make doctor output paste-friendly", "give me a drift summary for the PR", "/nyann:explain-diff". Do NOT trigger on "what's drifted" alone — that's `doctor` / `retrofit --report-only` (which produce the raw structured report this skill consumes). Do NOT trigger on "fix the drift" — that's `retrofit`.

适合你，如果需要在PR或聊天中解释代码漂移报告。