v3.3.2

danielmiessler/Fabricv3.3.2Apr 28, 2026by kichanyurd

AI Summary

This release introduces a new environment variable for controlling plugin timeouts and improves diagnostic error messages. It includes critical fixes for WebSocket latency, redundant batch creation, and MCP client reconnection stability. Additionally, it upgrades multiple dependencies to address security vulnerabilities and improves compatibility with Uvicorn 0.39+.

Key Highlights

Added `PARLANT_TOOL_CALL_TIMEOUT` environment variable to control the plugin tool-call timeout
Fixed WebSocketLogger event loop starvation which progressively blocked the async event loop
Fixed MCP tool clients getting stuck after sessions go stale by implementing automatic reconnection
Fixed `p.Server.current` becoming unavailable in the `resolve_tool` plugin endpoint under Uvicorn 0.39+
Upgraded dependencies and frontend tools to address known CVEs

New Features

Added `PARLANT_TOOL_CALL_TIMEOUT` environment variable to control the plugin tool-call timeout

Full Release Notes

## [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