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# v0.5.0 — Introducing Subagents: Parallel AI Power

Released February 19, 2026

## Highlights

* Meet Subagents: The main AI can now spin up independent, parallel agents to research your codebase or execute complex, multi-step tasks in the background
* Real-time visibility: Watch the subagents stream their thoughts and use tools live in the chat, keeping you fully in the loop
* Fast and comprehensive: The new 'Explore' subagent rapidly searches, greps, and reads your files, handing off a neat summary back to the main chat
* No more context overload: Deep-dive investigations happen in their own thread, keeping the main conversation clean and focused on building your game

## Changes

Added
* Subagent Architecture: The orchestrator AI can now delegate tasks to specialized, background AI agents
* Explore Subagent: A fast, read-only agent built for rapid codebase discovery using ripgrep and file system tools
* General Purpose Subagent: A fully capable agent that inherits the orchestrator's intelligence for making complex edits autonomously

Improved
* UI Chat Experience: Subagent activity streams live as a beautifully interleaved transcript of thoughts and tools, ending with a clear summary report

Fixed
* File Reading Reliability: Hardened the bridge between Summer Engine and the AI so it perfectly reads the exact file requested, even if you are actively working in another tab

Source: https://www.summerengine.com/changelog/0.5.0

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## Machine-readable resources

- Site index for agents: https://www.summerengine.com/llms.txt
- Full inlined content: https://www.summerengine.com/llms-full.txt
- Porting catalog: https://www.summerengine.com/llms-porting.txt
- Structured catalog: https://www.summerengine.com/agent-catalog.json
- Sitemap: https://www.summerengine.com/sitemap.xml
- Developer resources: https://www.summerengine.com/docs