# Page Not Found

The URL `core-concept/core-concepts/introduction/category-codes` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [12.6 “Zero Trust” (Policy-Heavy) Systems](https://docs.kakrlabs.com/12.-comparisons-and-obsolescence/12.6-zero-trust-policy-heavy-systems.md)
- [3.1 The Core Mental Model](https://docs.kakrlabs.com/3.-pteri-model-and-universal-trust-layer/3.1-the-core-mental-model.md)
- [10.8 Operational Responsibility Model](https://docs.kakrlabs.com/10.-operations-and-scaling/10.8-operational-responsibility-model.md)
- [12.5 Smart-Contract–Centric Web3 Stacks](https://docs.kakrlabs.com/12.-comparisons-and-obsolescence/12.5-smart-contract-centric-web3-stacks.md)
- [9.2 Threats Eliminated by Design](https://docs.kakrlabs.com/9.-threat-model-and-cryptography/9.2-threats-eliminated-by-design.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.kakrlabs.com/12.-comparisons-and-obsolescence/12.6-zero-trust-policy-heavy-systems.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.

### Option 2 — Browse the documentation index

Full index: https://docs.kakrlabs.com/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.kakrlabs.com/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/12.-comparisons-and-obsolescence/12.6-zero-trust-policy-heavy-systems.md`).

You may also use `Accept: text/markdown` header for content negotiation.