Release v0.3.0

Changes from 0.2.7 to 0.3.0

What's Changed

• feat: add portable browser and React Native client by @cpacker in #202
• feat(tools): defer SDK toolset defaults to the harness by @sarahwooders in #200
• chore(deps): bump @letta-ai/letta-code from 0.28.17 to 0.28.18 by @dependabot[bot] in #201
• fix: improve cloud API error messages with action, URL, and auth hints by @just-cameron in #153
• examples: custom external tools by @just-cameron in #164
• chore: clean up repository by @cpacker in #205
• feat: add portable agent and conversation management by @cpacker in #206
• docs: make the README a concise entry point by @cpacker in #207
• feat: expose portable session controls by @cpacker in #208
• fix: cloud createAgent 404s on production (trailing-slash route) by @cpacker in #209

Full Changelog: v0.2.7...v0.3.0