hisea/radian is a single-binary coding agent written in Rust, and its latest public release is v0.3.0. The repository offers a full-screen terminal interface and non-interactive execution, and records conversations in JSONL format. The provided material lists no changes for v0.3.0, so the specific changes in this release cannot be confirmed.
The same executable also bundles arc. arc splits requests into tasks, runs each task as a separate worker, and manages plans and tasks as files. Tasks run in isolated per-task workspaces, and only changes that pass the configured checks and approval gates are merged. So radian covers not just agent execution but everything from task decomposition to result integration. Model Context Protocol (MCP) integration, skills, and memory features are included as well. It is Rust-based and released under the Apache-2.0 license. The README includes documents and screen material explaining usage permissions, run procedures, and the repository's own task flow.
However, workspace-restricted execution and OS-level sandboxing are optional features. The README warns that the default permission setup does not provide isolation. Therefore, you cannot assume isolation between tasks or safe execution from the default settings alone. The material also lacks a v0.3.0 changelog, which limits the basis for judging what changed in the new version.