Conciseness

The body is lean throughout — every section is either a guardrail, a concrete command, or a validation check, with zero explanation of git concepts Claude already knows (e.g., "Check for uncommitted changes: git status --porcelain"). Not a 4 because there is no padding or over-explanation anywhere to trim.

Actionability

Every step is an executable, copy-paste-ready command with explicit placeholders (e.g., "git -C <main-worktree-path> merge <topic-branch>", "git -C <main-worktree-path> merge-base --is-ancestor <topic-branch> HEAD"), and conflict resolution covers the common case including the abort path. Not a 4 because no key execution detail is missing.

Workflow Clarity

The workflow is clearly sequenced (commit uncommitted changes → merge → resolve conflicts → validate) with an explicit Validation section containing two verification commands, and conflict handling includes error-recovery feedback (resolve-and-stage, ask user, or "merge --abort"). The destructive-operation validation cap does not apply because validation steps are present. Not a 4 because checkpoints are explicit rather than implicit, covering both a clean worktree and full-merge verification.

Progressive Disclosure

The skill is a short, single-purpose procedure with no bundle files (no references/, scripts/, or assets/ exist) and no need for external references; it is organized into well-signaled sections (Guidelines, Workflow, Validation) that keep everything one level deep. Per the rubric's simple-skill guidance, this warrants a 5. Not a 4 because there is no content that should have been split out into separate files.

Specificity

The description states one concrete action — "Merge changes from the topic branch to the merge base branch" — naming the domain (git merge between branches) but listing no secondary actions or conflict handling, matching the '1-2 concrete actions, but not comprehensive' anchor. Not a 4 because it does not list several specific actions; not a 2 because the action and target are concrete, not generic.

Completeness

It explicitly answers both: what — "Merge changes from the topic branch to the merge base branch" — and when — "Use when the user wants to merge their session's work back to the base branch", a concrete trigger phrase in third person. Not a 4 because the 'when' clause is fully explicit rather than only weakly implied or generic.

Trigger Term Quality

Natural phrases like "merge their session's work back to the base branch" and "merge changes" mirror what a user in this workflow would actually say. Not a 5 because it lacks synonyms and variations (e.g., "integrate", "combine branches", "sync work back") that would broaden trigger coverage; not a 3 because the core natural terms are present and well-phrased.

Distinctiveness Conflict Risk

Terms like "topic branch", "merge base branch", and "session's work" tie it to the worktree workflow, making it mostly distinct. Not a 5 because "merge" alone overlaps with any general git-merge skill; not a 3 because the worktree-specific vocabulary meaningfully narrows the trigger surface.