unity-history

1> **Before calling any skill in this module:** if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via `GET /skills/recommend?includeSchema=true`) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.
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3## Triggers
4- Reviewing or navigating undo history
5- Stepping undo/redo
6- Auditing what changed
7- 查看或浏览撤销历史、逐步撤销/重做、审查改动
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9# History Skills
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11Manage Unity Editor undo/redo history.
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13## Operating Mode
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15本模块 `history_get_current`（纯读）标 `SkillMode.SemiAuto`，三档下均可直接执行；`history_undo` / `history_redo` 会改变场景状态，为默认 `SkillMode.FullAuto`（Operation=Execute），Approval 模式下需 grant。**不含 NeverInSemi 高危 skill**。
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17`history_undo` / `history_redo` replay Unity's own native Undo/Redo stack, whose contents cannot be classified by write category the way `workflow` module's task snapshots can, so unlike `workflow_undo_task` / `workflow_session_undo` they carry no payload-level `SURFACE_EXCLUDED` check.
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19**DO NOT** (common hallucinations):
20- `history_list` / `history_get` do not exist → use `history_get_current` for current undo group
21- `history_clear` does not exist → Unity undo history cannot be cleared via API
22- `history_save` does not exist → undo history is managed by Unity automatically
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24**Routing**:
25- For simple undo/redo → `history_undo` / `history_redo` (this module) or `editor_undo` / `editor_redo`
26- For persistent task-level undo → use `workflow` module
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