video-frames

Extract frames or short clips from videos using ffmpeg.

1.31x

Quality

70%

Does it follow best practices?

Impact

100%

1.31x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./skills/video-frames/SKILL.md

Quality

Content

100%

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

This is an excellent, concise skill that does exactly what it needs to. It provides clear, executable commands for extracting video frames, includes practical tips about format choice (JPG vs PNG), and avoids any unnecessary verbosity. The only minor consideration is that the referenced script ({baseDir}/scripts/frame.sh) has no bundle file provided, but the skill content itself is well-crafted.

Dimension	Reasoning	Score
Conciseness	Very lean and efficient. No unnecessary explanations of what ffmpeg is or how video formats work. Every line serves a purpose.	3 / 3
Actionability	Provides concrete, copy-paste ready bash commands with clear flag usage (--time, --out). The examples cover the two main use cases (first frame, frame at timestamp) with specific syntax.	3 / 3
Workflow Clarity	This is a simple, single-purpose skill (extract a frame). The single action is unambiguous with clear commands. No multi-step process or destructive operations requiring validation checkpoints.	3 / 3
Progressive Disclosure	For a simple skill under 50 lines with no need for external references, the content is well-organized with a quick start section and concise notes. No bundle files are needed for this scope.	3 / 3
	Total	12 / 12 Passed

Description

40%

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 a clear niche (video frame/clip extraction via ffmpeg) which makes it distinctive, but it lacks a 'Use when...' clause and could benefit from more specific actions and natural trigger terms. Adding explicit trigger guidance and broader keyword coverage would significantly improve skill selection accuracy.

Suggestions

Add a 'Use when...' clause, e.g., 'Use when the user wants to extract frames, screenshots, thumbnails, or short clips from video files, or mentions ffmpeg, mp4, or video processing.'

Expand trigger terms to include common user phrases like 'screenshot from video', 'thumbnail', 'gif from video', 'keyframe', 'mp4', 'video processing'.

List more specific actions such as 'extract individual frames at specific timestamps, create short clips between time ranges, generate thumbnails, convert video segments to GIFs'.

Dimension	Reasoning	Score
Specificity	Names the domain (videos) and some actions (extract frames, short clips), and mentions the tool (ffmpeg), but doesn't list more comprehensive actions like specifying time ranges, output formats, or frame rate selection.	2 / 3
Completeness	Describes what the skill does but has no 'Use when...' clause or equivalent explicit trigger guidance, which per the rubric caps completeness at 2, and the 'what' itself is also fairly thin, bringing it closer to 1.	1 / 3
Trigger Term Quality	Includes relevant keywords like 'frames', 'clips', 'videos', and 'ffmpeg', but misses common user variations such as 'screenshot from video', 'thumbnails', 'video extraction', 'mp4', 'gif', or 'keyframes'.	2 / 3
Distinctiveness Conflict Risk	The combination of ffmpeg, video frames, and clips creates a clear niche that is unlikely to conflict with other skills. It's distinctly about video frame/clip extraction using a specific tool.	3 / 3
	Total	8 / 12 Passed

Validation

72%

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 — 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: deepgram/dglabs-deepclaw
Commit: ec8d4f8

Reviewed: about 1 month ago

Table of Contents

Discovery Implementation Validation

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