slack-gif-creator
Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like "make me a GIF of X doing Y for Slack."
Install with Tessl CLI
npx tessl i github:boisenoise/skills-collections --skill slack-gif-creator91
Does it follow best practices?
If you maintain this skill, you can automatically optimize it using the tessl CLI to improve its score:
npx tessl skill review --optimize ./path/to/skillEvaluation — 92%
↑ 2.13xAgent success when using this skill
Validation for skill structure
Discovery
89%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a solid description with excellent trigger terms and completeness. The explicit 'Use when' clause with a realistic example phrase is particularly effective. The main weakness is that the capabilities could be more concrete - 'constraints, validation tools, and animation concepts' is somewhat abstract compared to listing specific actions the skill enables.
Suggestions
Replace abstract terms like 'constraints, validation tools, and animation concepts' with specific actions such as 'Creates frame-by-frame animations, validates Slack size limits, optimizes color palettes for small file sizes'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (animated GIFs for Slack) and mentions some capabilities (constraints, validation tools, animation concepts), but doesn't list specific concrete actions like 'create frame sequences', 'optimize file size', or 'apply timing adjustments'. | 2 / 3 |
Completeness | Clearly answers both what (knowledge and utilities for creating animated GIFs optimized for Slack, provides constraints, validation tools, animation concepts) and when (explicit 'Use when' clause with example trigger phrase). | 3 / 3 |
Trigger Term Quality | Includes natural keywords users would say: 'animated GIFs', 'Slack', 'GIF', and provides a realistic user phrase example 'make me a GIF of X doing Y for Slack'. Good coverage of how users naturally request this. | 3 / 3 |
Distinctiveness Conflict Risk | Very specific niche combining 'animated GIFs' + 'Slack optimization' creates a distinct trigger profile. Unlikely to conflict with general image editing or other GIF tools due to the Slack-specific focus. | 3 / 3 |
Total | 11 / 12 Passed |
Implementation
72%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a solid, actionable skill with excellent code examples and good organization. The main weaknesses are some verbosity in explanatory sections (Philosophy, Making Graphics Look Good) and missing validation integration in the core workflow. The animation concepts and utility documentation are well-structured and practical.
Suggestions
Integrate validation into the core workflow as step 4: 'Validate: passes, info = validate_gif("output.gif", is_emoji=True)' before considering the task complete
Trim the 'Philosophy' section - Claude doesn't need explanation of what the skill provides vs doesn't provide
Condense 'Making Graphics Look Good' into a brief checklist rather than verbose paragraphs
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is mostly efficient but includes some unnecessary sections like the 'Philosophy' explanation and verbose guidance on 'Making Graphics Look Good' that could be tightened. The animation concepts section is well-organized but some explanations are more verbose than needed. | 2 / 3 |
Actionability | Provides fully executable code examples throughout - GIFBuilder usage, PIL drawing primitives, easing functions, and validators are all copy-paste ready with concrete parameters and real function calls. | 3 / 3 |
Workflow Clarity | The core workflow shows a clear 3-step sequence (create builder, generate frames, save), but lacks explicit validation checkpoints. The validators exist but aren't integrated into the workflow as a required step before considering the GIF complete. | 2 / 3 |
Progressive Disclosure | Well-organized with clear sections (Core Workflow, Drawing Graphics, Available Utilities, Animation Concepts, Optimization). Content is appropriately structured with quick-reference code blocks and logical groupings without requiring external file references for this scope. | 3 / 3 |
Total | 10 / 12 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 — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Reviewed
Table of Contents
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