Plane

Plane is an open-source project management tool for software teams, positioned as a self-hostable alternative to Jira and Linear. Its growing developer community and open-source foundation make it attractive for teams that want PM tooling under their control without vendor dependency. For agents integrating with engineering project management, Plane's API provides access to issues, cycles (sprints), and modules (epics) that covers the core software project management workflow.

Authentication uses API tokens with workspace-level scope. Self-hosted deployments manage their own credential infrastructure. Teams using the managed Plane Cloud service use standard API token management. Both deployment models support the same API surface.

The API covers projects, issues, states, labels, members, cycles, and modules. The coverage is sufficient for automating the primary engineering PM workflows — creating issues from automated processes (test failures, monitoring alerts), updating issue status as work progresses, and reporting sprint progress. The open-source foundation means teams can also inspect and extend the platform for custom automation needs.

Reliability for self-hosted Plane is the team's operational responsibility, with the same considerations as any self-hosted engineering tooling. Plane Cloud provides managed reliability. Teams adopting Plane for agent-driven issue management workflows should validate the reliability of their chosen deployment model before building deep automation dependencies.

Documentation is solid and growing as the project matures. The API reference covers the available endpoints clearly. Teams familiar with other PM APIs (Jira, Linear) will find the concepts familiar. Being open-source means teams can supplement official documentation with source code inspection when documentation gaps arise.