nano-pdf
Edit PDFs with natural-language instructions using the nano-pdf CLI.
68
Quality
60%
Does it follow best practices?
Impact
81%
2.61xAverage score across 3 eval scenarios
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./openclaw/skills/nano-pdf/SKILL.mdQuality
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 is too brief and lacks explicit trigger guidance. While it identifies the domain (PDFs) and tool (nano-pdf CLI), it fails to specify concrete actions beyond generic 'edit' and provides no 'Use when...' clause to help Claude distinguish when to select this skill.
Suggestions
Add a 'Use when...' clause with explicit triggers like 'Use when the user wants to edit, modify, or update existing PDF files using natural language commands'
List specific editing capabilities such as 'add text, remove pages, annotate, redact content, rearrange pages'
Include natural trigger terms users might say: 'modify PDF', 'change PDF', 'update PDF', '.pdf editing'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (PDFs) and mentions a tool (nano-pdf CLI), but 'edit' is a single vague action without listing specific capabilities like extracting text, merging, filling forms, etc. | 2 / 3 |
Completeness | Describes what (edit PDFs) 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 'PDFs' and 'edit' which are relevant, but misses common variations users might say like '.pdf files', 'modify PDF', 'change PDF', 'PDF editing', or specific operations. | 2 / 3 |
Distinctiveness Conflict Risk | The mention of 'nano-pdf CLI' adds some distinctiveness, but 'edit PDFs' is generic enough to potentially conflict with other PDF-related skills that might handle editing differently. | 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 well-crafted, minimal skill that respects token efficiency and provides immediately actionable guidance. The main weakness is the ambiguity around page numbering (0-based vs 1-based) which could cause errors, and the validation step is mentioned but not made concrete.
Suggestions
Clarify the page numbering convention definitively, or provide a concrete way to check which convention applies (e.g., 'Run nano-pdf --version to check; v2+ uses 1-based')
Make the validation step more concrete: specify how to sanity-check (e.g., 'Open output PDF and verify the edited page visually' or provide a specific command)
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely lean and efficient. No unnecessary explanations about what PDFs are or how CLI tools work. Every line serves a purpose. | 3 / 3 |
Actionability | Provides a complete, copy-paste ready command with a realistic example. The command syntax is clear and immediately executable. | 3 / 3 |
Workflow Clarity | For a simple single-command skill, the workflow is mostly clear, but the note about page numbering ambiguity (0-based vs 1-based) introduces uncertainty without a concrete way to determine which applies. The 'sanity-check' advice is vague rather than explicit. | 2 / 3 |
Progressive Disclosure | For a simple skill under 50 lines with a single task, the content is appropriately structured with a quick start section and relevant notes. No external references needed for this scope. | 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 | |
- Repository
- trpc-group/trpc-agent-go
- Commit
8763418
- Reviewed
Table of Contents
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