Conciseness

The ~45-line body is lean and assumes Claude's competence: no explanations of what editors or CLIs are, just the decision rule ("Depending on which EDITOR the user says they are using... If no editor specified, you must ask"), the critical interaction constraint ("you MUST wait for the user to say something before moving on"), five terse command blocks, and a one-line failure fallback ("If any of these fail tell the user to install the corresponding CLI tool"). Every token earns its place.

Actionability

Concrete, executable commands are given for five editors ("code --goto <file_path>:<line_number>", "pycharm --line <line_number> <file_path>", etc.), covering the common cases. It sits below a 5 because the placeholder formats are inconsistent across examples (<file_path>:<line_number> vs. "path/to/file.md:43" vs. "+42 blah.py") and the IntelliJ command name is stated without the general parameter convention used for the others.

Workflow Clarity

For this simple, single-purpose skill the sequence is unambiguous: determine the user's editor (asking if unspecified), show a file at an optional line, and the explicit checkpoint "you MUST wait for the user to say something before moving on to the next file", plus an error-recovery instruction if a CLI command fails. No destructive or batch operations are involved, so no validation cap applies.

Progressive Disclosure

The skill is under 50 lines with no bundle files (references/, scripts/, assets/ are absent) and no need for external references. Per the simple-skill guideline, well-organized sections alone warrant a 5: the single "## Instructions" section cleanly separates the decision rule, the one-by-one/wait constraint, per-editor commands, and the failure fallback.

Specificity

The description lists several concrete actions — "walk through (code or text) files in a EDITOR", "explain how some code works", "show the user what changes you made", "at specific line numbers" — which would rate a 4, but it is written in second person ("user wants you to walk through", "You would typically use this", "This way the user is easily able"), which the guidelines penalize by one point.

Completeness

Both parts are present: the 'when' is explicit ("Use this when user wants you to walk through... files in a EDITOR") and the 'what' names concrete actions (explain code, show changes, point at line numbers). It falls short of a 5 because the 'what' is diluted by repetition ("sometimes with specific line-numbers... possibly at specific line numbers") and hedged with "etc.", leaving the capability list less crisp than the anchor-5 example.

Trigger Term Quality

Good natural-keyword coverage: "walk through", "code or text files", "explain how some code works", "show the user what changes", "line numbers", "editor" are phrases a user would plausibly say. Common variations like "walk me through", "show me your changes", or "open file at line N" are missing, keeping it below a 5.

Distinctiveness Conflict Risk

The editor-walkthrough-with-line-numbers niche is mostly distinct — no other typical skill triggers on navigating the user's editor to a specific file/line. There is minor overlap risk with code-review or code-explanation skills via the generic phrase "explain how some code works", which keeps it from a 5.