Conciseness

Seven lean directive bullets ("Use `#!/usr/bin/env bash` as shebang", "Always use `set -euo pipefail` for safety") with zero padding and no explanation of concepts Claude already knows. Every token earns its place, matching the lean-and-efficient anchor exactly.

Actionability

Mostly concrete and executable guidance: exact commands (`set -euo pipefail`, `chmod +x <script>`) and specific behaviors ("print usage to stderr and exit if inputs are missing/invalid"). It stops short of fully copy-paste-ready coverage because no complete example script shows the rules applied together and input-validation guidance lacks a concrete pattern.

Workflow Clarity

As a simple single-purpose style guide, each rule is an unambiguous directive, so clarity is high. However, "Minimal input validation" and "if failure is obvious on use" leave judgment calls without illustrative examples, keeping it below the fully unambiguous level 5.

Progressive Disclosure

The skill is under 50 lines, self-contained, needs no external references (and none exist in the bundle), and is organized as a clean headed bullet list. Per the simple-skill guideline, this earns full credit for structure and navigability.

Specificity

"Bash script style guide" names the domain but enumerates no concrete capabilities or actions, matching the anchor "Names the domain but actions are minimal or generic". It falls short of 3 because it never lists what the guide covers (e.g., shebangs, strict mode, error handling) and above 1 because the domain is clearly identified.

Completeness

Both parts are present: "Bash script style guide" states the what, and "Always use when writing bash scripts, shell scripts, or CLI bash tools" is an explicit when clause with concrete triggers. The what is thin (no summary of what the style guide governs), keeping it below the fully explicit anchor 5.

Trigger Term Quality

"bash scripts, shell scripts, or CLI bash tools" provides good natural-phrase coverage with synonyms users would actually say. It misses file extensions (.sh) and common variations like "shell scripting" or "bash one-liners", so it does not reach the comprehensive anchor 5.

Distinctiveness Conflict Risk

The bash/shell scripting niche is clear and the triggers are distinct from unrelated skills, with only minor overlap risk against general coding-style or other shell-language skills. It is not a 5 because adjacent skills (general shell commands, zsh) could plausibly compete for the same triggers.