merge: integrate Shannon 3.0 with public v2.6.0

- preserve the versioned and non-TTY banners from public main
- keep workspace launch classification ahead of shared infrastructure setup
- carry the eleven-commit Agentic SAST feature history unchanged
- normalize Capella prompt endings to the accepted candidate tree

README.md

@@ -39,6 +39,7 @@ It analyzes your source code, identifies attack paths, and executes real exploit
 - [Documentation](#documentation)
 - [Safety, Scope, and Limitations](#safety-scope-and-limitations)
 - [License](#license)
+- [Acknowledgements](#acknowledgements)
 - [About Keygraph](#about-keygraph)
 - [Community and Support](#community-and-support)
 - [Common Questions](#common-questions)
@@ -230,6 +231,14 @@ Commercial and enterprise licensing is available for organizations that need dif
 
 For commercial licensing, contact [shannon@keygraph.io](mailto:shannon@keygraph.io).
 
+## Acknowledgements
+
+Thanks to [Pi](https://github.com/earendil-works/pi),
+[Playwright CLI](https://github.com/microsoft/playwright-cli),
+and [Mantis](https://github.com/google/mantis).
+
+See [THIRD_PARTY_NOTICES.md](./THIRD_PARTY_NOTICES.md) for licensing and attribution details.
+
 ## About Keygraph
 
 **Keygraph** is the company behind Shannon. It also builds the **Keygraph platform**, the commercial agentic pentesting product that closes the full AppSec lifecycle and runs an enhanced build of Shannon as its pentesting engine.