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".
Install with Tessl CLI
npx tessl i github:ComposioHQ/awesome-claude-skills --skill slack-gif-creatorOverall
score
84%
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/skillValidation 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 well-crafted description with excellent trigger terms and completeness. The explicit 'Use when' equivalent and example phrase make selection criteria clear. The main weakness is that the capabilities could be more concrete—'validators' and 'composable animation primitives' are somewhat technical and don't clearly convey what actions the skill performs.
Suggestions
Replace technical terms like 'validators for size constraints' and 'composable animation primitives' with concrete actions such as 'create looping animations, optimize file size under 128KB, add text overlays'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (animated GIFs for Slack) and mentions some capabilities (validators for size constraints, composable animation primitives), but doesn't list specific concrete actions like 'create looping animations', 'resize frames', or 'optimize file size'. | 2 / 3 |
Completeness | Clearly answers both what (toolkit for creating animated GIFs with validators and animation primitives) and when (explicit trigger: 'applies when users request animated GIFs or emoji animations for Slack') with a concrete example phrase. | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'animated GIFs', 'GIF', 'Slack', 'emoji animations', and provides an example phrase 'make me a GIF for Slack of X doing Y' that mirrors real user requests. | 3 / 3 |
Distinctiveness Conflict Risk | Very specific niche combining 'Slack' + 'animated GIFs' + 'emoji animations' creates a distinct trigger profile unlikely to conflict with general image editing or other GIF-related skills. | 3 / 3 |
Total | 11 / 12 Passed |
Implementation
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-crafted skill with excellent actionability and clear validation workflows for Slack's strict constraints. The code examples are comprehensive and executable, covering a wide range of animation primitives. However, the skill would benefit from being more concise by moving detailed API references to separate files and trimming explanatory prose.
Suggestions
Move the detailed animation primitive API documentation to a separate PRIMITIVES_REFERENCE.md file, keeping only 2-3 key examples in the main skill
Remove the 'Philosophy' section - Claude doesn't need meta-guidance about creative freedom
Condense the 'Helper Utilities' section by removing explanatory text like 'Professional-looking GIFs often use cohesive color palettes' - just show the code
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is comprehensive but includes some unnecessary verbosity, such as the philosophy section and repeated explanations of concepts. The extensive API documentation could be more condensed, though most content is useful reference material. | 2 / 3 |
Actionability | Excellent actionability with fully executable Python code examples throughout. Every animation primitive has copy-paste ready code with clear parameters, and the composition patterns show complete working examples. | 3 / 3 |
Workflow Clarity | Clear workflow with explicit validation steps throughout. The skill emphasizes validating file size frequently, provides specific validators (check_slack_size, validate_gif, is_slack_ready), and includes optimization strategies when constraints aren't met. | 3 / 3 |
Progressive Disclosure | Content is well-organized with clear sections, but the skill is monolithic at ~400 lines. The extensive API reference for all animation primitives could be split into separate reference files, with SKILL.md providing just the overview and most common patterns. | 2 / 3 |
Total | 10 / 12 Passed |
Validation
81%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 |
|---|---|---|
skill_md_line_count | SKILL.md is long (647 lines); consider splitting into references/ and linking | Warning |
description_trigger_hint | Description may be missing an explicit 'when to use' trigger hint (e.g., 'Use when...') | Warning |
metadata_version | 'metadata' field is not a dictionary | Warning |
Total | 13 / 16 Passed | |
- Reviewed
Table of Contents
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