peekaboo
Capture and automate macOS UI with the Peekaboo CLI.
67
Does it follow best practices?
If you maintain this skill, you can automatically optimize it using the tessl CLI to improve its score:
npx tessl skill review --optimize ./path/to/skillEvaluation — 77%
↑ 1.92xAgent success when using this skill
Validation for skill structure
Discovery
32%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
The description identifies the tool (Peekaboo CLI) and general domain (macOS UI capture/automation) but is too brief to be effective for skill selection. It lacks specific capabilities, natural trigger terms users would say, and critically missing explicit 'Use when...' guidance.
Suggestions
Add a 'Use when...' clause with trigger terms like 'screenshot', 'screen capture', 'Mac automation', 'click buttons', 'window contents'
List specific concrete actions such as 'take screenshots, read window text, click UI elements, list open applications'
Include natural user phrases like 'capture my screen', 'automate clicking', 'what's on my Mac desktop'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (macOS UI) and two actions (capture, automate), but lacks specific concrete actions like 'take screenshots', 'click buttons', 'read window contents', or 'record interactions'. | 2 / 3 |
Completeness | Provides a brief 'what' but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. | 1 / 3 |
Trigger Term Quality | Includes 'macOS UI' and 'Peekaboo CLI' which are relevant, but misses natural user terms like 'screenshot', 'screen capture', 'automation', 'click', 'window', or 'Mac desktop'. | 2 / 3 |
Distinctiveness Conflict Risk | 'Peekaboo CLI' is distinctive and specific to this tool, but 'automate macOS UI' could overlap with other automation or macOS-related skills without clearer boundaries. | 2 / 3 |
Total | 7 / 12 Passed |
Implementation
87%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a high-quality CLI reference skill that excels at conciseness and actionability. It provides comprehensive coverage of Peekaboo's capabilities with executable examples. The main weakness is the lack of explicit validation steps and error recovery guidance for UI automation operations that can be fragile.
Suggestions
Add validation checkpoints to workflows, e.g., 'Verify element exists before clicking: check `peekaboo see --json` output for expected ID'
Include error handling guidance for common failures (element not found, permissions denied, window closed)
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely lean and efficient - no explanations of what macOS is or how CLIs work. Every section is dense with actionable commands and flags, assuming Claude's competence throughout. | 3 / 3 |
Actionability | Fully executable bash commands throughout with specific flags, real examples, and copy-paste ready code. The examples section provides concrete workflows for common tasks. | 3 / 3 |
Workflow Clarity | The 'See -> click -> type' example shows a clear sequence, but most examples lack validation checkpoints. No explicit error handling or feedback loops for operations that could fail (permissions, element not found, etc.). | 2 / 3 |
Progressive Disclosure | Well-organized with clear sections (Features, Quickstart, Parameters, Examples). Content is appropriately structured for a CLI reference - not monolithic, uses headers effectively, and points to `--help` for deeper details. | 3 / 3 |
Total | 11 / 12 Passed |
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 |
|---|---|---|
metadata_version | 'metadata.version' is missing | Warning |
metadata_field | 'metadata' should map string keys to string values | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 8 / 11 Passed | |
- Reviewed
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