# Perceptor Management

Create New Perceptor

```bash
composabl perceptor new \
  --name derivative-calc \
  --description "Calculates derivative of sensor values" \
  --location ./perceptors/
```

#### Generated Perceptor Structure

```python
# perceptor.py
import time
from composabl_core import PerceptorImpl

class DemoPerceptor(PerceptorImpl):
    def __init__(self, *args, **kwargs):
        self.previous_value = None
        self.previous_time = None
    
    async def compute(self, obs_spec, obs):
        current_value = obs["counter"]
        current_time = time.time()
        value_derived = 0
        
        if self.previous_value is not None and self.previous_time is not None:
            time_delta = current_time - self.previous_time
            if time_delta > 0:
                value_derived = (current_value - self.previous_value) / time_delta
        
        self.previous_value = current_value
        self.previous_time = current_time
        
        return {"counter_derived": value_derived}
    
    def filtered_sensor_space(self, obs):
        return ["counter"]
```

#### Perceptor Commands

```bash
# Publish perceptor
composabl perceptor publish ./perceptors/derivative-calc/

# List perceptors
composabl perceptor list

# Delete perceptor
composabl perceptor delete
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.amesa.com/reference/cli-reference/perceptor-management.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.