slack-gif-creator

Toolkit for creating animated GIFs optimized for Slack, with validators for size constraints and composable animation primitives. This skill applies when users request animated GIFs or emoji animations for Slack from descriptions like "make me a GIF for Slack of X doing Y".

4.65x

Quality

75%

Does it follow best practices?

Impact

93%

4.65x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/all-skills/skills/slack-gif-creator/SKILL.md

Quality

Content

63%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 richly actionable toolkit reference that assumes Claude's competence and provides extensive executable examples plus a sensible creative workflow. Its main weakness is structural: a monolithic SKILL.md that inlines the full primitive API rather than pointing to separate reference files.

Suggestions

Move the per-primitive API catalog (shake, bounce, spin, pulse, fade, zoom, explode, wiggle, slide, flip, morph, move, kaleidoscope) into a REFERENCE.md or per-template reference files, keeping SKILL.md as a lean overview with one or two representative examples and clear links.

Trim the repeated creative-freedom reassurances to a single statement so the body respects the token budget.

Complete the abbreviated code examples (e.g. supply object_data for the wobble spin and the bare wave move) so every snippet is copy-paste runnable.

Dimension	Reasoning	Score
Conciseness	The body avoids explaining concepts Claude already knows and is mostly code, but it is ~640 lines inlining the full API for every primitive plus repeated 'creative freedom' reassurance ('Apply these tools however needed', 'Complete creative freedom is available', 'mix freely') that could be trimmed.	3 / 5
Actionability	Abundant concrete, mostly copy-paste-ready code with real imports and parameters covering common cases, but a few examples omit required args (e.g. create_spin_animation(rotation_type='wobble', full_rotations=3) lacks object_data) and would not run as-is.	4 / 5
Workflow Clarity	The Philosophy section gives a clear 5-step sequence (understand vision, design, apply primitives, validate constraints, iterate) with validation checkpoints via check_slack_size/validate_gif and an Optimization Strategies fallback, though the early steps are somewhat high-level.	4 / 5
Progressive Disclosure	Section headers organize the material, but the entire per-primitive API reference is inlined in SKILL.md with no separate reference files in references/scripts/assets, so content that belongs in one-level-deep docs is not split out.	3 / 5
	Total	14 / 20 Passed

Description

87%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 that pairs concrete capabilities with an explicit, naturally-worded applicability clause and a quoted user trigger phrase. It is third-person throughout and clearly distinguishable from adjacent skills.

Dimension	Reasoning	Score
Specificity	Names the Slack-GIF domain and several concrete capabilities — 'creating animated GIFs optimized for Slack', 'validators for size constraints', 'composable animation primitives' — but the actions are stated as categories rather than a fully comprehensive concrete list, so it stops short of the top anchor.	4 / 5
Completeness	Explicitly answers both what ('Toolkit for creating animated GIFs optimized for Slack, with validators... and composable animation primitives') and when ('This skill applies when users request animated GIFs or emoji animations for Slack from descriptions like...'), with a concrete trigger phrase.	5 / 5
Trigger Term Quality	Includes natural user phrasing via the quoted trigger 'make me a GIF for Slack of X doing Y' plus 'animated GIFs' and 'emoji animations', giving good keyword coverage, though synonyms like '.gif' or 'sticker' are absent.	4 / 5
Distinctiveness Conflict Risk	The Slack-specific constraint ('optimized for Slack', Slack size validators) carves a clear niche with distinct triggers and minimal overlap risk against generic GIF skills.	5 / 5
	Total	18 / 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
skill_md_line_count	SKILL.md is long (648 lines); consider splitting into references/ and linking	Warning
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	14 / 16 Passed

Repository: davepoon/buildwithclaude
Path: plugins/all-skills/skills/slack-gif-creator/SKILL.md
Commit: a9fa86d

Reviewed: about 18 hours ago

Table of Contents

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