🐈 nanobot v0.1.4.post2 is here — 32 PRs merged, 14 new contributors! The community is on fire 🔥

This release focuses on reliability: a completely redesigned heartbeat, prompt caching for lower API costs, hardened provider compatibility, and dozens of channel-level fixes. Fewer surprises, more stability.

Highlights

• Heartbeat Overhaul — Replaced fragile token detection with a virtual tool-call decision mechanism; heartbeat is now truly silent when idle (#1102, #1054, #1039, #1036)
• Prompt Cache Optimization — Dynamic context (time, session) moved from system prompt to user message, enabling persistent prompt cache hits (#1115)
• Agent Reliability — Behavioral constraints, full tool history in context, and actionable error hints (#1046)
• Slack — Thread-isolated sessions, mrkdwn post-processing for bold/header artifacts, socket error handling (#1048, #1107, #957)
• Feishu — Rich-text image extraction in post messages, file download API fix (#1090, #986)
• Email — Proactive sends work even when autoReply is disabled, smarter dedup eviction (#1077, #959)
• Provider Fixes — DeepSeek reasoning_content normalization, empty content block filtering, API key hot-reload via @property (#947, #955, #949, #1071, #1098)
• Security — Path traversal prevention using relative_to() instead of startswith() (#956)
• MCP — Configurable timeouts to prevent agent hangs, removed conflicting defaults for HTTP transport (#950, #1062)
• Memory — Fixed TypeError when LLM returns dict arguments during consolidation (#1061)
• Discord — Break typing indicator loop on persistent HTTP failure (#1029)
• CLI — DingTalk, QQ, Email added to nanobot status output (#982)
• Packaging — Workspace templates moved to nanobot/templates/ for proper pip packaging (#1043)
• Docs — systemd user service deployment guide (#968)

What's Changed

• fix: change VolcEngine litellm prefix from openai to volcengine by @init-new-world in https://github.com/HKUDS/nanobot/pull/951
• fix(context): Fix 'Missing reasoning_content field' error for deepseek provider. by @homorunner in https://github.com/HKUDS/nanobot/pull/947
• Remove redundant tools description by @vincentchen0x2-dev in https://github.com/HKUDS/nanobot/pull/939
• feat(cli): add DingTalk, QQ, and Email to channels status output by @luoyingwen in https://github.com/HKUDS/nanobot/pull/982
• fix(security): prevent path traversal bypass via startswith check by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/956
• fix(slack): add exception handling to socket listener by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/957
• fix(session): handle errors in legacy session migration by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/958
• fix(email): evict oldest half of dedup set instead of clearing entirely by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/959
• fix(loop): serialize /new consolidation and preserve session on archival failure by @Athemis in https://github.com/HKUDS/nanobot/pull/881
• fix(qq): make start() long-running per base channel contract by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/962
• docs: add systemd user service instructions to README by @katafractari in https://github.com/HKUDS/nanobot/pull/968
• fix(mcp): add 30s timeout to MCP tool calls to prevent agent hangs by @eliumusk in https://github.com/HKUDS/nanobot/pull/950
• fix(providers): normalize empty reasoning_content to None at provider level by @nghiahsgs in https://github.com/HKUDS/nanobot/pull/955
• fix(feishu): replace file.get with message_resource.get to fix feishu file download problem by @FloRainRJY in https://github.com/HKUDS/nanobot/pull/986
• fix(provider): filter empty text content blocks causing API 400 by @eliumusk in https://github.com/HKUDS/nanobot/pull/949
• feat(channels): add send_progress option to control progress message … by @luoyingwen in https://github.com/HKUDS/nanobot/pull/1000
• fix(heartbeat): route heartbeat runs to enabled chat context by @KimGLee in https://github.com/HKUDS/nanobot/pull/1036
• refactor: move workspace/ to nanobot/templates/ for packaging by @Re-bin in https://github.com/HKUDS/nanobot/pull/1043
• improve agent reliability: behavioral constraints, full tool history, error hints by @Re-bin in https://github.com/HKUDS/nanobot/pull/1046
• feat(slack): isolate session context per thread by @pjbakker in https://github.com/HKUDS/nanobot/pull/1048
• fix(heartbeat): deliver agent response to user and fix HEARTBEAT_OK detection by @Re-bin in https://github.com/HKUDS/nanobot/pull/1054
• fix(heartbeat): make start idempotent and require exact HEARTBEAT_OK by @cyzlmh in https://github.com/HKUDS/nanobot/pull/1039

New Contributors

• @homorunner made their first contribution in https://github.com/HKUDS/nanobot/pull/947
• @vincentchen0x2-dev made their first contribution in https://github.com/HKUDS/nanobot/pull/939
• @luoyingwen made their first contribution in https://github.com/HKUDS/nanobot/pull/982
• @nghiahsgs made their first contribution in https://github.com/HKUDS/nanobot/pull/956
• @katafractari made their first contribution in https://github.com/HKUDS/nanobot/pull/968
• @eliumusk made their first contribution in https://github.com/HKUDS/nanobot/pull/950
• @FloRainRJY made their first contribution in https://github.com/HKUDS/nanobot/pull/986
• @cyzlmh made their first contribution in https://github.com/HKUDS/nanobot/pull/1039
• @suportly made their first contribution in https://github.com/HKUDS/nanobot/pull/1061
• @xzq-xu made their first contribution in https://github.com/HKUDS/nanobot/pull/1090
• @dulltackle made their first contribution in https://github.com/HKUDS/nanobot/pull/1062
• @haosenwang1018 made their first contribution in https://github.com/HKUDS/nanobot/pull/1071
• @pikaxinge made their first contribution in https://github.com/HKUDS/nanobot/pull/1115
• @devops-tomorrow-io made their first contribution in https://github.com/HKUDS/nanobot/pull/1107

Full Changelog: https://github.com/HKUDS/nanobot/compare/v0.1.4.post1...v0.1.4.post2