# Custom Actions
Create your own actions by adding `.yaml` files to `~/.vibe-action/actions/`. Any subdirectory works — the engine loads all files recursively.
Some examples below are fragments focused on a single feature — the full skeleton (`version`, `name`, `about`, `args`, `api`) lives in [Action Structure](./action-structure.md).
## Hello World
```yaml
version: 0.0.1
name: hello
about: Say hello
actions:
- tag: tag_hello
run: value
expect: string
action: Hello, World!
```
## Shell Command
```yaml
version: 0.0.1
name: disk
about: Show disk usage
actions:
- tag: tag_disk
run: cmd
expect: string
action: df -h /
```
## With Arguments
Arguments are used for settings and flags, not for the main data input.
```yaml
version: 0.0.1
name: greet
about: Greet someone
args:
- name: name
short: n
input: string
help: Name to greet
default: World
actions:
- tag: tag_greeting
run: value
expect: string
action: Hello, {name}!
```
## LLM Call
Use the `{query}` tag to accept the main text input (from CLI argument or clipboard).
```yaml
actions:
- tag: tag_answer
run: small
expect: string
action: |
Explain this concept in simple terms:
{query}
```
## Vision Call
Use `{query|image}` to accept an image (from file path, URL, or clipboard).
```yaml
api:
- tag: tag_description
run: vision
expect: string
action: |
{query|image|load|text}
Describe this image in detail.
```
## Fetch Web or PDF
Use `{query|load|text}` to fetch content from a URL or read a local file.
```yaml
actions:
- tag: tag_description
run: small
expect: string
action: |
Summarize this document:
{query|load|text}
```
## Scan Codebase
Use `{query|project_path}` to automatically determine the project root.
```yaml
version: 0.0.1
name: my-scan
about: Scan project codebase as JSON
api:
input: query|project_path
actions:
- tag: tag_validate
run: cmd
expect: string
action:
- when: '{query|project_path|is_dir}'
then: echo "{query|project_path}"
- when: '{query|project_path|is_dir:not}'
then: echo "'{query|project_path}' is not a directory" && exit 1
- tag: tag_resolve
run: value
expect: string
action: '{tag_validate|resolve}'
- tag: tag_ast
run: value
expect: list
action: '{tag_resolve|scan|ast:brief}'
- tag: tag_json
run: value
expect: string
action: '{tag_ast|format:json}'
```
## Clipboard
Use the `clipboard` modifier to copy values at any pipeline step:
```yaml
- tag: tag_copy
run: value
expect: string
action: '{tag_data|format:json|clipboard}'
```
## Conditional Actions (When/Then)
```yaml
actions:
- tag: tag_changed
run: cmd
expect: list
action: git diff --name-only
- tag: tag_commit
run: cmd
expect: string
action:
- when: '{tag_changed|empty:not}'
then: git add . && git commit -m "auto: updates"
- when: '{tag_changed|empty}'
then: echo "Nothing to commit."
```
## Multi-Step Pipeline
```yaml
actions:
- tag: tag_content
run: cmd
expect: string
action: cat {query|file_path}
- tag: tag_summary
run: small
expect: string
action: |
Summarize this file in 2-3 sentences:
{tag_content}
```
## Tips
- **Tag naming:** use `tag_` prefix for consistency with built-in actions
- **Dependencies:** the engine sorts steps by `{tag}` references, not YAML order — [Tag System](./tag-system.md)
- **Validation:** add `check: ".+"` to ensure non-empty output
- **Debugging:** `VIBE_LOG_TYPE` / `VIBE_TRACE_LEVEL` — [CLI Reference](./cli-reference.md)
- **Clipboard:** use `{tag|clipboard}` to copy any value to clipboard mid-pipeline
- **Images:** use `{query|image}` for vision flows — works with files, URLs, and clipboard
- **System tags:** see [System Tags](./system-tags.md) for all available environment variables
- **Notifications:** add `notify: true` to show desktop notification on completion
- **IDE integration:** the `api` block reference lives in [IDE Integration](./vibe-action-cross.md)