v0.4.3

What's Changed

• feat(agentstack-server): support stdio mcp by @JanPokorny in #1606
• feat(sdk): add tool call extension by @pilartomas in #1572
• feat(ui): add A2A error extension by @PetrBulanek in #1655
• fix(ui): dynamic server usage error by @PetrBulanek in #1658
• feat(ui): make context token permissions configurable via env by @PetrBulanek in #1663
• fix(connectors): give user permissions to use connectors API by @pilartomas in #1677
• feat(server): improve conversation title generation prompt by @jezekra1 in #1675
• Add README for Agent Stack Client SDK by @jenna-winkler in #1671
• chore: stable branch releasing by @tomkis in #1665
• chore: version bump 0.4.3 by @tomkis in #1683

Full Changelog: v0.4.2...v0.4.3