v0.29.0

This release brings substantial performance improvements for larger installations, a smoother workspace creation flow, and updates to several experimental features.

Key improvements:

• Significantly improved startup time and memory usage for installations with hundreds or thousands of workspaces
• Workspace creation now shows live progress directly in the transcript instead of a full-page loading screen
• Settings backups now let you choose which instructions, skills, memories, preferences, and MCP settings to include

Honorable mentions:

• Fixed duplicate final responses after sub-agent reports
• Stopped sub-agents now stay stopped after restarting Xum
• Many bug-fixes around compaction, history integrity, and transcript loading

Experimental features (off by default):

• Agent Memory: sub-agents now share their parent's memory notebook instead of keeping private notes, so discoveries are available across the task tree
• Token Budget: agents are prompted to finish their current unit of work, save notes, and call new_context rather than being reset immediately at the configured budget
• Token Budget: improved session_history browsing, including newest-first results, role and tool filters, and access to descendant sub-agent transcripts
• Agent Plugins: pick individual skills and MCP servers to import, and change those selections later without reinstalling
• Agent Plugins: MCP servers can now be enabled globally rather than separately in every workspace
• Dynamic Workflows: fixed child recovery loops and stalled cancellation