# Application Security and Secure SDLC

> **Why this block exists:** Use this block for secure design, code and architecture review, classic AppSec controls, browser/frontend risk, business-logic abuse, and stack-specific engineering guidance.

This page is a **navigation anchor** for the grouped v7.6 sidebar. It does not replace the original domain sections. It helps readers enter the KB through a smaller number of high-signal buckets, then drill down into subdomains and finally into individual articles.

## Sections in this block

| Section                                                                                    | What you will find there                                                                |
| ------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------- |
| [Threat Modeling](/application-security-and-secure-sdlc/index.md)                          | Existing domain section kept intact and now grouped under this larger navigation block. |
| [Application Security](/application-security-and-secure-sdlc/index-1.md)                   | Existing domain section kept intact and now grouped under this larger navigation block. |
| [Frontend and Browser Security](/application-security-and-secure-sdlc/index-2.md)          | Existing domain section kept intact and now grouped under this larger navigation block. |
| [Business Logic Abuse and Product Abuse](/application-security-and-secure-sdlc/index-3.md) | Existing domain section kept intact and now grouped under this larger navigation block. |
| [Stack-Specific Secure Engineering](/application-security-and-secure-sdlc/index-4.md)      | Existing domain section kept intact and now grouped under this larger navigation block. |

## How to use this block

1. Start with the section cover page that best matches your current problem.
2. Open the specific child article only after you know the domain you are in.
3. Use search when you already know the exact topic or artifact name.

\---*Author attribution: Ivan Piskunov, 2026 - Educational and defensive-engineering use.*


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# 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.product-security.expert/application-security-and-secure-sdlc.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.