parlant

[3.3.2] - 2026-04-28

Added

• Add PARLANT_TOOL_CALL_TIMEOUT environment variable to control the plugin tool-call timeout

Changed

• Include guideline description (in addition to the condition) in matcher prompts
• Render active journeys' descriptions in the canned response draft prompt
• Improve error messages surfaced by EmcieService to be more diagnostic
• Relax the aiopenapi3 pin to >=0.8.1,<0.9.0

Fixed

• Fix redundant batch creation in ToolCaller across guideline matches, which in some agents caused a lot of latency unnecessarily
• Fix WebSocketLogger event loop starvation which progressively blocked the async event loop, causing increasing latency over time
• Fix p.Server.current becoming unavailable in the resolve_tool plugin endpoint under Uvicorn 0.39+. Context vars are now restored at the start of resolve_tool, mirroring the existing pattern in call_tool, so choice providers depending on p.Server.current work again
• Fix MCP tool clients getting stuck after sessions go stale. Clients now reconnect automatically instead of failing subsequent calls

Security

• Upgrade dependencies to address known CVEs: authlib (>=1.6.11), requests (>=2.33.0), fastmcp (>=3.2.0), litellm (>=1.83.0), pytest (>=9.0.3), pyjwt (>=2.11.1), and constrain transitive deps — aiohttp, cryptography, pillow, pyopenssl, werkzeug, Mako, pyasn1, python-multipart, orjson, Pygments, diskcache
• Upgrade chat frontend: vite (>=7.3.2) and override transitive deps: picomatch, lodash, flatted, brace-expansion, immutable, yaml