> For the complete documentation index, see [llms.txt](https://docs.quilter.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quilter.ai/physics-rule-checks-prcs.md).

# Physics Rule Checks (PRCs)

- [Overview](https://docs.quilter.ai/physics-rule-checks-prcs/overview.md): Overview of Physics Rule Checks (PRCs) applied by Quilter to validate user-defined physics constraints.
- [Ground Plane Overlap](https://docs.quilter.ai/physics-rule-checks-prcs/ground-plane-overlap.md): Explanation of the Ground Plane Overlap PRC, verifying consistent ground coverage beneath impedance controlled signals to ensure signal integrity and minimize EMI.
- [Invalid Width Span](https://docs.quilter.ai/physics-rule-checks-prcs/invalid-width-span.md): Summary of the Invalid Width Span PRC, ensuring trace widths remain within acceptable tolerances for impedance control, current capacity, and EMI mitigation.
- [Layer Switch Count](https://docs.quilter.ai/physics-rule-checks-prcs/layer-switch-count.md): Summary of the Layer Switch Count PRC, verifying minimal via count between bypass capacitors and associated pins to maintain low impedance and effective decoupling.
- [Length Mismatch](https://docs.quilter.ai/physics-rule-checks-prcs/length-mismatch.md)
- [Overheated Length](https://docs.quilter.ai/physics-rule-checks-prcs/overheated-length.md)
- [Pin Distance](https://docs.quilter.ai/physics-rule-checks-prcs/pin-distance.md): Summary of the Pin Distance PRC, checking pin spacing to ensure short traces, reduced EMI, and improved routing efficiency.
- [Trace Path Length](https://docs.quilter.ai/physics-rule-checks-prcs/trace-path-length.md): Summary of the Trace Path Length PRC, validating trace lengths to minimize inductance, enhance noise filtering, and ensure efficient power and signal integrity.
- [Uncoupled Spacing](https://docs.quilter.ai/physics-rule-checks-prcs/uncoupled-spacing.md): Summary of the Uncoupled Spacing PRC, checking differential pair spacing to ensure effective electromagnetic coupling, consistent impedance, and minimal crosstalk.
- [Future PRC2s](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s.md)
- [Top Plane Ground Pour](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/top-plane-ground-pour.md)
- [Neck Downs](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/neck-downs.md)
- [Trace Proximity](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/trace-proximity.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

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

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.quilter.ai/physics-rule-checks-prcs.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.