chore: restructure skills repo with new agents and skill bundles
- Add new skills: deep-dive, docs-rag, meta-creator, ppt-maker, sdlc - Add agent configs: g-assistent, meta-creator, sdlc with prompt files - Add reference docs for custom agents and skills specification - Add utility scripts: install-agents.sh, orchestrate.py, puml2svg.sh - Update README and commit-message skill config - Remove deprecated skills: codereview, python, testing, typescript - Add .gitignore
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> ## Documentation Index
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> Fetch the complete documentation index at: https://agentskills.io/llms.txt
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> Use this file to discover all available pages before exploring further.
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# Specification
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> The complete format specification for Agent Skills.
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## Directory structure
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A skill is a directory containing, at minimum, a `SKILL.md` file:
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```
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skill-name/
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├── SKILL.md # Required: metadata + instructions
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├── scripts/ # Optional: executable code
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├── references/ # Optional: documentation
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├── assets/ # Optional: templates, resources
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└── ... # Any additional files or directories
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```
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## `SKILL.md` format
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The `SKILL.md` file must contain YAML frontmatter followed by Markdown content.
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### Frontmatter
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| Field | Required | Constraints |
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| --------------- | -------- | ----------------------------------------------------------------------------------------------------------------- |
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| `name` | Yes | Max 64 characters. Lowercase letters, numbers, and hyphens only. Must not start or end with a hyphen. |
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| `description` | Yes | Max 1024 characters. Non-empty. Describes what the skill does and when to use it. |
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| `license` | No | License name or reference to a bundled license file. |
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| `compatibility` | No | Max 500 characters. Indicates environment requirements (intended product, system packages, network access, etc.). |
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| `metadata` | No | Arbitrary key-value mapping for additional metadata. |
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| `allowed-tools` | No | Space-delimited list of pre-approved tools the skill may use. (Experimental) |
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<Card>
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**Minimal example:**
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```markdown SKILL.md theme={null}
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---
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name: skill-name
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description: A description of what this skill does and when to use it.
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---
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```
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**Example with optional fields:**
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```markdown SKILL.md theme={null}
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---
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name: pdf-processing
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description: Extract PDF text, fill forms, merge files. Use when handling PDFs.
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license: Apache-2.0
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metadata:
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author: example-org
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version: "1.0"
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---
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```
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</Card>
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#### `name` field
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The required `name` field:
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* Must be 1-64 characters
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* May only contain unicode lowercase alphanumeric characters (`a-z`) and hyphens (`-`)
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* Must not start or end with a hyphen (`-`)
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* Must not contain consecutive hyphens (`--`)
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* Must match the parent directory name
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<Card>
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**Valid examples:**
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```yaml theme={null}
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name: pdf-processing
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```
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```yaml theme={null}
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name: data-analysis
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```
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```yaml theme={null}
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name: code-review
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```
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**Invalid examples:**
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```yaml theme={null}
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name: PDF-Processing # uppercase not allowed
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```
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```yaml theme={null}
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name: -pdf # cannot start with hyphen
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```
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```yaml theme={null}
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name: pdf--processing # consecutive hyphens not allowed
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```
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</Card>
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#### `description` field
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The required `description` field:
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* Must be 1-1024 characters
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* Should describe both what the skill does and when to use it
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* Should include specific keywords that help agents identify relevant tasks
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<Card>
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**Good example:**
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```yaml theme={null}
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description: Extracts text and tables from PDF files, fills PDF forms, and merges multiple PDFs. Use when working with PDF documents or when the user mentions PDFs, forms, or document extraction.
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```
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**Poor example:**
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```yaml theme={null}
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description: Helps with PDFs.
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```
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</Card>
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#### `license` field
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The optional `license` field:
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* Specifies the license applied to the skill
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* We recommend keeping it short (either the name of a license or the name of a bundled license file)
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<Card>
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**Example:**
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```yaml theme={null}
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license: Proprietary. LICENSE.txt has complete terms
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```
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</Card>
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#### `compatibility` field
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The optional `compatibility` field:
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* Must be 1-500 characters if provided
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* Should only be included if your skill has specific environment requirements
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* Can indicate intended product, required system packages, network access needs, etc.
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<Card>
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**Examples:**
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```yaml theme={null}
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compatibility: Designed for Claude Code (or similar products)
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```
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```yaml theme={null}
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compatibility: Requires git, docker, jq, and access to the internet
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```
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```yaml theme={null}
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compatibility: Requires Python 3.14+ and uv
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```
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</Card>
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<Note>
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Most skills do not need the `compatibility` field.
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</Note>
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#### `metadata` field
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The optional `metadata` field:
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* A map from string keys to string values
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* Clients can use this to store additional properties not defined by the Agent Skills spec
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* We recommend making your key names reasonably unique to avoid accidental conflicts
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<Card>
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**Example:**
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```yaml theme={null}
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metadata:
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author: example-org
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version: "1.0"
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```
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</Card>
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#### `allowed-tools` field
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The optional `allowed-tools` field:
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* A space-delimited list of tools that are pre-approved to run
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* Experimental. Support for this field may vary between agent implementations
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<Card>
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**Example:**
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```yaml theme={null}
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allowed-tools: Bash(git:*) Bash(jq:*) Read
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```
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</Card>
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### Body content
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The Markdown body after the frontmatter contains the skill instructions. There are no format restrictions. Write whatever helps agents perform the task effectively.
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Recommended sections:
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* Step-by-step instructions
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* Examples of inputs and outputs
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* Common edge cases
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Note that the agent will load this entire file once it's decided to activate a skill. Consider splitting longer `SKILL.md` content into referenced files.
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## Optional directories
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### `scripts/`
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Contains executable code that agents can run. Scripts should:
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* Be self-contained or clearly document dependencies
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* Include helpful error messages
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* Handle edge cases gracefully
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Supported languages depend on the agent implementation. Common options include Python, Bash, and JavaScript.
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### `references/`
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Contains additional documentation that agents can read when needed:
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* `REFERENCE.md` - Detailed technical reference
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* `FORMS.md` - Form templates or structured data formats
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* Domain-specific files (`finance.md`, `legal.md`, etc.)
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Keep individual [reference files](#file-references) focused. Agents load these on demand, so smaller files mean less use of context.
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### `assets/`
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Contains static resources:
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* Templates (document templates, configuration templates)
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* Images (diagrams, examples)
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* Data files (lookup tables, schemas)
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## Progressive disclosure
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Skills should be structured for efficient use of context:
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1. **Metadata** (\~100 tokens): The `name` and `description` fields are loaded at startup for all skills
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2. **Instructions** (\< 5000 tokens recommended): The full `SKILL.md` body is loaded when the skill is activated
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3. **Resources** (as needed): Files (e.g. those in `scripts/`, `references/`, or `assets/`) are loaded only when required
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Keep your main `SKILL.md` under 500 lines. Move detailed reference material to separate files.
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## File references
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When referencing other files in your skill, use relative paths from the skill root:
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```markdown SKILL.md theme={null}
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See [the reference guide](references/REFERENCE.md) for details.
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Run the extraction script:
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scripts/extract.py
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```
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Keep file references one level deep from `SKILL.md`. Avoid deeply nested reference chains.
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## Validation
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Use the [skills-ref](https://github.com/agentskills/agentskills/tree/main/skills-ref) reference library to validate your skills:
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```bash theme={null}
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skills-ref validate ./my-skill
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```
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This checks that your `SKILL.md` frontmatter is valid and follows all naming conventions.
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