Release v0.27.28

What's Changed

• feat(cli): add letta dream --to for agentic AGENTS.md maintenance by @carenthomas in #3245
• feat(cli): add letta dream --from external sources via adapter framework by @carenthomas in #3249
• fix(headless): handle bidirectional interrupts by @codeluggage in #2631
• feat(headless): emit local tool calls and returns in stream-json by @devanshrj in #3242
• feat(slack): add rich live progress cards by @overlord-letta in #3029
• fix(slack): never leave progress cards stuck on dead streams (LET-9499) by @cpacker in #3255
• refactor(channels): remove vendor-specific code from websocket listener layer by @cpacker in #3258
• feat(tools): make shell description a required parameter across toolsets by @cpacker in #3254
• fix(bash): recover from deleted working directories by @overlord-letta in #3238
• feat(cli): dream --to syncs doc into memfs system/ (repo-as-truth) before reflecting by @carenthomas in #3251
• fix(slack): stop inlining inbound attachments as base64 images (LET-9517) by @cpacker in #3260
• chore: bump version to 0.27.28 by @github-actions[bot] in #3256

New Contributors

• @codeluggage made their first contribution in #2631

Full Changelog: v0.27.27...v0.27.28