Use when the user wants to roll back a change by moving a Unit's head (or a set of Units' heads) to a prior revision — phrases like "roll back this change", "revert the last release", "undo the ChangeSet", "restore to the last applied revision", "back out yesterday's image bump", "put the head back where it was before this ChangeSet", "roll back the promotion". Always rolls back by moving head via `cub unit update --restore <target>` against one Unit or a Filter-scoped set (optionally tagged), then hands off to the `cub-apply` skill to push the restored state. Do not load for drift between ConfigHub and cluster (use `drift-reconcile`) or for rolling back a single-field change where a forward mutation via `cub-mutate` is clearer.
Quality
Discovery
SkippedBased on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
Implementation
SkippedReviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
Validation
72%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 8 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
description_field | 'description' must not contain XML tags | Fail |
allowed_tools_field | 'allowed-tools' contains unusual tool name(s) | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 8 / 11 Failed | |
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Table of Contents
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.