v0.5.0: NomadArch - Binary-Free Mode Release

Features:
- Binary-Free Mode: No OpenCode binary required
- NomadArch Native mode with free Zen models
- Native session management
- Provider routing (Zen, Qwen, Z.AI)
- Fixed MCP connection with explicit connectAll()
- Updated installers and launchers for all platforms
- UI binary selector with Native option

Free Models Available:
- GPT-5 Nano (400K context)
- Grok Code Fast 1 (256K context)
- GLM-4.7 (205K context)
- Doubao Seed Code (256K context)
- Big Pickle (200K context)

tasks/done/024-agent-attachments.md

@@ -0,0 +1,31 @@
+---
+title: Agent Attachments
+description: Allow @agent mentions for multi-agent conversations.
+---
+
+Implement Agent Attachments
+
+---
+
+### @ Agent Autocomplete
+
+When a user types `@` followed by an agent name, display an autocomplete list of available agents.
+
+Filter agent suggestions as the user types.
+
+---
+
+### Attach Agents
+
+Enable users to select an agent from the autocomplete list to attach to their prompt.
+
+Display attached agents as interactive chips.
+
+---
+
+### Acceptance Criteria
+
+- Typing `@` followed by a partial agent name displays matching agent suggestions.
+- Selecting an agent creates an attachment chip.
+- Attached agents are included in the prompt submission.
+- Agent chips can be removed.