Verifiers v0.1.13.dev5 Release Notes

Date: 04/22/2026

Highlights since v0.1.13.dev4

• Made the interception proxy's streaming response resilient to upstream cuts: 10s SSE keepalive comments keep idle streams warm, per-chunk asyncio.sleep(0) forces an event-loop yield so content and close can't race the transport flush under warmup-burst contention, and transport exceptions at prepare/write/write_eof are surfaced as StreamInterrupted into state["error"] so rollouts reschedule instead of looking like clean zero-turn completions.
• Added a new experimental mini_swe_agent composable harness (pip/uv install with SHA256-verified wheel download), exported alongside existing rlm and opencode harnesses.
• Extended SandboxMixin to cover VM sandboxes in addition to containers (including GPU VMs via CreateSandboxRequest), with documentation clarifying feature parity (file I/O, background jobs, cleanup) and container-only features (port exposure, SSH).

Changes included in v0.1.13.dev5 (since v0.1.13.dev4)

Latest changes from main

• Includes the latest main changes through the interception proxy streaming resilience fix (#1194), along with the mini_swe_agent harness (#1219) and SandboxMixin VM sandbox support/docs (#1222).

Features and enhancements

• Add mini-swe-agent harness (#1219)
• Update SandboxMixin (#1222)

Fixes and maintenance

• fix: make interception proxy streaming resilient to upstream cuts (#1194)

Full Changelog: v0.1.13.dev4...v0.1.13.dev5