🎉 Another big release from the 🐈 nanobot community — thanks to all contributors, especially our 19 new ones!

This release brings major channel improvements across Feishu, Slack, and Discord, a new provider, prompt caching, and a significant agent loop refactor. More reliable, more capable, leaner code 😄.

Highlights

• Feishu Media — Bot can now send and receive images, audio, and files (#844, #922)
• Slack Media Upload — Send files directly from the agent (#904)
• Discord Long Messages — Automatically splits messages exceeding 2000 characters (#900)
• VolcEngine Provider — New LLM provider support (#812)
• Prompt Caching — Anthropic and OpenRouter cache_control support for lower costs (#854, #905)
• MCP Auth Headers — Custom HTTP headers for authenticated MCP servers (#807)
• Telegram Improvements — Configurable reply-to behavior, /help bypasses ACL (#879, #824)
• CLI Subagent Support — CLI now routes through message bus, enabling full subagent support (#908)
• Reliable Memory — Memory consolidation uses structured tool calls instead of fragile JSON parsing (#866)
• Leaner Agent Loop — Extracted memory logic, merged redundant methods, -31% lines (#930)
• Smarter File Editing — edit_file now shows a diff when old_text doesn't match (#921)
• Bug Fixes — MCP reconnection, session key persistence, duplicate replies, cron execution, and more (#892, #902, #832, #821, #823, ...)

What's Changed

• feat(feishu): support sending images, audio, and files by @KinglittleQ in https://github.com/HKUDS/nanobot/pull/844
• fix: Codex provider routing for GitHub Copilot models by @Molunerfinn in https://github.com/HKUDS/nanobot/pull/836
• fix: wait for killed process after shell timeout to prevent fd leaks by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/851
• Fix safety guard false positive on 'format' in URLs by @rubychilds in https://github.com/HKUDS/nanobot/pull/820
• fix: remove dead pub/sub code from MessageBus by @AlexanderMerkel in https://github.com/HKUDS/nanobot/pull/870
• fix: use loguru native formatting to prevent KeyError on curly braces by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/864
• Fix: Add UTF-8 encoding and unicode support for JSON output by @chtangwin in https://github.com/HKUDS/nanobot/pull/455
• fix(tools): resolve relative file paths against workspace by @omdv in https://github.com/HKUDS/nanobot/pull/653
• fix(cron): validate timezone inputs when adding jobs by @Athemis in https://github.com/HKUDS/nanobot/pull/763
• fix(agent): handle non-string values in memory consolidation by @jswxharry in https://github.com/HKUDS/nanobot/pull/644
• feat: add Anthropic prompt caching via cache_control by @tercerapersona in https://github.com/HKUDS/nanobot/pull/854
• fix: allow retry for models that send interim text before tool calls by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/825
• fix: prevent duplicate memory consolidation tasks per session by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/823
• fix: /help command bypasses ACL on Telegram by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/824
• feat: Add VolcEngine LLM provider support by @init-new-world in https://github.com/HKUDS/nanobot/pull/812
• feature: Added custom headers for MCP Auth use. by @dxtime in https://github.com/HKUDS/nanobot/pull/807
• feat: Agent is able to reply to original message (Telegram Channel) by @DaryeDev in https://github.com/HKUDS/nanobot/pull/815
• fix: make cron run command actually execute the agent by @ClaytonWWilson in https://github.com/HKUDS/nanobot/pull/821
• feat: make Telegram reply-to-message behavior configurable, default false by @Re-bin in https://github.com/HKUDS/nanobot/pull/879
• fix: fixed not logging tool uses if a think fragment had them attached. by @DaryeDev in https://github.com/HKUDS/nanobot/pull/833
• fix: Resolve "Unrecognized chat message" error for StepFun and strict providers by @Tevkanbot in https://github.com/HKUDS/nanobot/pull/795
• feat: add OpenRouter prompt caching via cache_control by @tercerapersona in https://github.com/HKUDS/nanobot/pull/905
• feat(slack): add media file upload support by @pjbakker in https://github.com/HKUDS/nanobot/pull/904
• fix: convert remaining f-string logger calls to loguru native format by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/903
• fix: split Discord messages exceeding 2000-character limit by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/900
• fix: store session key in metadata to avoid lossy filename reconstruction by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/902
• fix(agent): avoid duplicate email replies when message tool already sends by @KimGLee in https://github.com/HKUDS/nanobot/pull/832
• fix: allow MCP reconnection after transient failure by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/892
• refactor: route CLI interactive mode through message bus by @Re-bin in https://github.com/HKUDS/nanobot/pull/908
• feat(feishu): add multimedia download support for images, audio and files by @coldxiangyu163 in https://github.com/HKUDS/nanobot/pull/922
• fix(tools): provide detailed error messages in edit_file when old_text not found by @themavik in https://github.com/HKUDS/nanobot/pull/921
• fix: preserve interim content as fallback when retry produces empty response by @nikolasdehor in https://github.com/HKUDS/nanobot/pull/887
• refactor(loop): remove interim text retry, use system prompt constraint instead by @Re-bin in https://github.com/HKUDS/nanobot/pull/928
• fix(memory): Enforce memory consolidation schema with a tool call by @rudy-of-the-corner in https://github.com/HKUDS/nanobot/pull/866
• refactor: extract memory consolidation to MemoryStore, slim down agent loop by @Re-bin in https://github.com/HKUDS/nanobot/pull/930
• fix(agent): keep empty fallback sentinel CLI-only by @Athemis in https://github.com/HKUDS/nanobot/pull/926

New Contributors

• @KinglittleQ made their first contribution in https://github.com/HKUDS/nanobot/pull/844
• @Molunerfinn made their first contribution in https://github.com/HKUDS/nanobot/pull/836
• @nikolasdehor made their first contribution in https://github.com/HKUDS/nanobot/pull/851
• @rubychilds made their first contribution in https://github.com/HKUDS/nanobot/pull/820
• @AlexanderMerkel made their first contribution in https://github.com/HKUDS/nanobot/pull/870
• @chtangwin made their first contribution in https://github.com/HKUDS/nanobot/pull/455
• @omdv made their first contribution in https://github.com/HKUDS/nanobot/pull/653
• @Athemis made their first contribution in https://github.com/HKUDS/nanobot/pull/763
• @jswxharry made their first contribution in https://github.com/HKUDS/nanobot/pull/644
• @tercerapersona made their first contribution in https://github.com/HKUDS/nanobot/pull/854
• @init-new-world made their first contribution in https://github.com/HKUDS/nanobot/pull/812
• @dxtime made their first contribution in https://github.com/HKUDS/nanobot/pull/807
• @ClaytonWWilson made their first contribution in https://github.com/HKUDS/nanobot/pull/821
• @Tevkanbot made their first contribution in https://github.com/HKUDS/nanobot/pull/795
• @pjbakker made their first contribution in https://github.com/HKUDS/nanobot/pull/904
• @KimGLee made their first contribution in https://github.com/HKUDS/nanobot/pull/832
• @coldxiangyu163 made their first contribution in https://github.com/HKUDS/nanobot/pull/922
• @rudy-of-the-corner made their first contribution in https://github.com/HKUDS/nanobot/pull/866

Full Changelog: https://github.com/HKUDS/nanobot/compare/v0.1.4...v0.1.4.post1