video-frames

Extract frames or short clips from videos using ffmpeg.

Quality

78%

Does it follow best practices?

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Adds up to 20 points to the overall score

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Securityby

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./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.

The body is a model of brevity and actionability: two concrete, executable commands for the two common cases plus concise usage notes, with a real bundled script backing the references. No weaknesses found.

Dimension	Reasoning	Score
Conciseness	The body is lean and efficient ('First frame', 'At a timestamp' plus two short executable snippets and a brief Notes list); it assumes Claude's competence with no padding or explanation of concepts Claude already knows, matching the 'lean and efficient' level-3 anchor.	3 / 3
Actionability	Both examples are fully executable, copy-paste-ready bash commands invoking a real bundled script ({baseDir}/scripts/frame.sh) with concrete arguments and outputs, matching the 'fully executable code/commands; copy-paste ready' anchor.	3 / 3
Workflow Clarity	This is a simple single-task skill whose single action is unambiguous (run frame.sh with --out, optionally --time), so per the scoring notes workflow clarity can score 3 without a multi-step sequence; the two variants are clearly labeled.	3 / 3
Progressive Disclosure	The skill is under 50 lines with no need for external references beyond the single bundled script it correctly points to; sections (Quick start, Notes) are well organized and the referenced {baseDir}/scripts/frame.sh is a real file, satisfying the level-3 simple-skill condition.	3 / 3
	Total	12 / 12 Passed

Description

57%

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 clearly states the skill's core capability and is appropriately concise and distinct, but it is missing an explicit 'when to use' trigger clause and could cover more natural keyword variations, which together cap it just above the midpoint.

Suggestions

Add an explicit trigger clause, e.g. 'Use when extracting still frames or short clips from a video for inspection or thumbnails.'

Broaden natural keyword coverage by mentioning terms users actually say, such as 'thumbnails', 'stills', or 'preview frames'.

Optionally name a second concrete action (e.g., 'grab the first frame or a frame at a timestamp') to raise specificity toward the multi-action anchor.

Dimension	Reasoning	Score
Specificity	The phrase 'Extract frames or short clips from videos' names the domain and a couple of concrete actions, but does not comprehensively list the range of extraction actions (e.g., thumbnails, index-based selection), so it sits at the 'names domain and some actions, but not comprehensive' anchor rather than the multi-action level 3.	2 / 3
Completeness	It answers 'what does this do' but lacks any 'Use when...' clause or equivalent explicit trigger guidance, so per the judging guidelines completeness is capped at 2.	2 / 3
Trigger Term Quality	It includes relevant natural keywords ('frames', 'short clips', 'videos', 'ffmpeg') but omits common variations a user might say (e.g., 'thumbnails', 'stills', 'preview'), matching 'some relevant keywords but missing common variations' rather than the full-coverage level 3.	2 / 3
Distinctiveness Conflict Risk	The niche is clear and specific (ffmpeg-based frame/clip extraction from videos) with distinct triggers, making it unlikely to fire for unrelated skills, matching the level-3 'clear niche with distinct triggers' anchor.	3 / 3
	Total	9 / 12 Passed

Validation

81%

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 — 13 / 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
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	13 / 16 Passed

Repository: Bitterbot-AI/bitterbot-desktop
Path: skills/video-frames/SKILL.md
Commit: e73c717

Reviewed: about 15 hours ago

Table of Contents

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