[ehudfisher]

Summary

Simplify the Python repository and package READMEs around the current LangChain integration:

• Move the coding-agent prompt CTA near the top of the root README and keep it copyable in GitHub Markdown.
• Explain code mode, existing LangChain tools, ptc, @tools, Blueprint tools.call, session reuse, and the middleware contract in concise reference prose.
• Replace the root documentation link dump with contextual next steps.
• Remove the duplicated Deep Agents file-tool walkthrough while retaining the option contract and subagent limitation.

Validation

• git diff --check
• Root and package preview pages served HTTP 200.
• Live integration link checked: https://submilli.ai/docs/tutorials/connect-deepagents/#your-tools-in-programs
• Live HTTP API anchor checked: https://submilli.ai/docs/reference/http-api#application-tools
• Frozen preview Original articles preserved byte-for-byte.
• Silent demo renders as a native GitHub video player with controls.
• No model calls or product tests were needed for these prose-only changes.