CtrlK
BlogDocsLog inGet started
Tessl Logo

nano-pdf

Edit PDFs with natural-language instructions using the nano-pdf CLI.

68

2.61x
Quality

60%

Does it follow best practices?

Impact

81%

2.61x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No known issues

Fix and improve this skill with Tessl

tessl review fix ./skills/nano-pdf/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

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 efficiently teaches Claude how to use the nano-pdf CLI. Its strength is extreme conciseness with a concrete, actionable example. The main weakness is the lack of a specific validation step for checking the output PDF, which matters for a tool that modifies documents.

Suggestions

Specify how to validate the output PDF (e.g., 'Open the output with a PDF viewer or run `nano-pdf inspect output.pdf` to verify changes').

DimensionReasoningScore

Conciseness

Very lean and efficient. Every line serves a purpose—no explanation of what PDFs are or how CLI tools work. The notes are practical and non-obvious (0-based vs 1-based page numbering gotcha).

3 / 3

Actionability

Provides a concrete, copy-paste-ready command with a realistic example showing both the command structure and the natural-language instruction format. The usage pattern is immediately clear.

3 / 3

Workflow Clarity

This is a simple single-step tool, but the 'sanity-check the output PDF' note is vague—it doesn't specify how to verify (e.g., open it, use a specific command). For a tool that performs destructive edits to PDFs, a more explicit validation step would be warranted.

2 / 3

Progressive Disclosure

For a simple, single-purpose skill under 50 lines with no need for external references, the content is well-organized with a clear quick start section and practical notes. No bundle files are needed.

3 / 3

Total

11

/

12

Passed

Description

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 concise but too sparse. It identifies the domain (PDF editing) and the tool (nano-pdf CLI) but lacks specific actions, explicit trigger guidance ('Use when...'), and natural keyword variations that would help Claude reliably select this skill from a large pool.

Suggestions

Add a 'Use when...' clause with explicit triggers, e.g., 'Use when the user asks to edit, modify, annotate, or update PDF files.'

List specific concrete actions the skill supports, such as 'add text, remove pages, reorder pages, annotate, merge PDFs' to improve specificity.

Include natural keyword variations users might say, such as '.pdf files', 'modify PDF', 'change PDF content', 'PDF document editing'.

DimensionReasoningScore

Specificity

Names the domain (PDFs) and a general action (edit), and mentions the tool (nano-pdf CLI), but does not list specific concrete actions like extracting text, filling forms, merging, etc.

2 / 3

Completeness

Describes what it does at a high level (edit PDFs) but has no 'Use when...' clause or explicit trigger guidance, which per the rubric caps completeness at 2, and the 'what' is also quite thin, bringing it to 1.

1 / 3

Trigger Term Quality

Includes 'PDFs' and 'edit' as natural keywords, but misses common variations like '.pdf files', 'modify PDF', 'update PDF', 'PDF editing', or specific operations users might request.

2 / 3

Distinctiveness Conflict Risk

Mentioning 'nano-pdf CLI' adds some distinctiveness, but 'edit PDFs' is broad enough to overlap with other PDF-related skills that might handle editing, extraction, or form filling.

2 / 3

Total

7

/

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.

Validation8 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

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
deepgram/dglabs-deepclaw
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.