video-frames

Extract a frame at a timestamp or frame index from a local video using ffmpeg for inspection, thumbnails, and visual debugging.

Quality

82%

Does it follow best practices?

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Securityby

Passed

No findings from the security scan

Quality

Content

100%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.

The body is a model of a lean, well-structured simple skill: executable commands, a prerequisite check, an output verification step, and a single clearly-signaled bundled helper.

Dimension	Reasoning	Score
Conciseness	The body is lean (~30 lines), assumes Claude's competence, and every line earns its place with no padding or explanation of concepts Claude already knows.	5 / 5
Actionability	Provides three copy-paste-ready, executable commands (first frame, timestamp, frame index) plus a concrete prerequisite check, covering the common cases.	5 / 5
Workflow Clarity	As a simple single-purpose skill it sequences check-ffmpeg -> run helper -> verify-output, with an explicit verification checkpoint ('Verify the output file exists before returning it to the user').	5 / 5
Progressive Disclosure	Under 50 lines with a single clearly-signaled one-level-deep reference to the real bundled scripts/frame.sh, organized into clear sections.	5 / 5
	Total	20 / 20 Passed

Description

65%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.

The description is specific and distinctive with a clear niche, but it omits an explicit 'Use when...' trigger clause and lists only one core action in two modes, limiting completeness and specificity.

Suggestions

Add an explicit trigger clause such as 'Use when the user needs a still frame, thumbnail, or visual snapshot from a local video.'

Broaden the action coverage beyond a single extract action, e.g. mention output format choice (JPEG/PNG) or batch extraction to lift specificity.

Include file-extension trigger terms (e.g. .mp4, .mov) and the phrase 'video frame' to strengthen trigger term quality.

Dimension	Reasoning	Score
Specificity	"Extract a frame at a timestamp or frame index from a local video using ffmpeg" names the domain with 1-2 concrete actions, but it is essentially one action in two parameter modes rather than several distinct actions.	3 / 5
Completeness	The 'what' is clear, but there is no explicit 'Use when...' trigger clause; 'when' is only weakly implied by the listed use cases (inspection, thumbnails, visual debugging), capping completeness at 3.	3 / 5
Trigger Term Quality	Includes natural terms users would say (frame, video, timestamp, thumbnails, ffmpeg) with some synonyms, but lacks file extensions like .mp4 or phrasing variants.	4 / 5
Distinctiveness Conflict Risk	"Extract a frame at a timestamp or frame index from a local video using ffmpeg" carves a clear niche with distinct triggers and minimal conflict risk with other skills.	5 / 5
	Total	15 / 20 Passed

Validation

87%

Warnings & errors only

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

Validation — 14 / 16 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

	Total	14 / 16 Passed

Repository: EKKOLearnAI/hermes-studio
Path: packages/ekko-agent/skills/video-frames/SKILL.md
Commit: 07ccb17

Reviewed: 5 days ago

Table of Contents

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