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file-conversion

Convert files between formats — PDF to Word, HEIC to JPG, MP4 to MP3, CSV to JSON, EPUB to MOBI, and 999 total routes across images, video, audio, documents, data, fonts, ebooks, and archives. Free via changethisfile.com, no API key or signup. Use when the user needs a file converted to a different format.

77

Quality

96%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

93%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, executable skill body: concrete commands for MCP, script, and remote-URL paths with clear error-handling guidance and well-organized sections. The only gap is the absence of an explicit post-conversion validation step, which keeps workflow clarity at 4.

Suggestions

Add an explicit output-validation checkpoint after conversion (e.g., verify the output file exists, is non-empty, and has the expected extension/format before reporting success) to lift workflow_clarity to 5.

Note the expected output location/extension per path so Claude can confirm the result matches the requested target_format.

Consider a one-line pre-flight check that list_conversions is consulted for any route not among the named examples, making the existing discovery guidance an explicit step in the decision order.

DimensionReasoningScore

Conciseness

Lean and direct instructions with no padding or explanation of concepts Claude already knows; the server-side engine parenthetical is relevant context rather than fluff, so every token earns its place.

5 / 5

Actionability

Provides copy-paste-ready guidance across all three paths: a bundled script invocation with a concrete example (report.docx pdf), an executable curl for remote URLs, and an executable curl for list_conversions.

5 / 5

Workflow Clarity

A clear decision-order sequence with error-recovery feedback loops (rate limit -> wait 60s + retry; unsupported -> lists valid targets) and a pre-flight list_conversions check, but it lacks an explicit output-validation checkpoint to confirm the converted file is valid, so it sits at anchor 4 rather than 5.

4 / 5

Progressive Disclosure

Under 50 lines and well-organized into clear sections, with a real one-level-deep bundle reference (scripts/convert.sh, verified to exist) and full docs offloaded to an external URL, matching the simple-skill exception for a clean 5.

5 / 5

Total

19

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description: concrete conversion examples, broad format-extension coverage, an explicit 'Use when' trigger in third person, and a clearly distinct niche. It answers both what and when without padding or over-claims.

DimensionReasoningScore

Specificity

Lists concrete conversion pairs (PDF to Word, HEIC to JPG, MP4 to MP3, CSV to JSON, EPUB to MOBI) plus comprehensive coverage across 11 named categories and 999 routes, matching the 'multiple specific concrete actions; comprehensive coverage' anchor.

5 / 5

Completeness

Explicitly answers 'what' (convert files between formats with concrete examples and the hosting service) and 'when' ('Use when the user needs a file converted to a different format') with a concrete trigger phrase.

5 / 5

Trigger Term Quality

Includes the natural verb 'convert', the trigger phrase 'needs a file converted to a different format', and many format extensions (HEIC, JPG, MP4, MP3, CSV, JSON, EPUB, MOBI), giving comprehensive coverage of natural terms and file extensions.

5 / 5

Distinctiveness Conflict Risk

Occupies a clear conversion niche with a distinct trigger ('file converted to a different format') and minimal overlap with extraction or analysis skills.

5 / 5

Total

20

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
wshobson/agents
Reviewed

Table of Contents

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