Harness Journey

Journey Harness is a long-horizon AI engineering system designed to keep agents working reliably toward complex software goals across multiple steps, interruptions, and sessions. MongoDB acts as the persistent memory layer, storing goals, conversations, plans, research, and execution checkpoints so the agent can resume without losing progress. Tavily continuously tracks online sources for newly discovered bugs, vulnerabilities, and exploits that could affect the project, giving the agent up-to-date information while it works. Daytona provides isolated sandbox environments where the agent can safely execute and test code, while GitHub is used for controlled repository access, dedicated branches, and reviewable pull requests. OpenCode coordinates the AI agent and tool execution, tying these systems together into a persistent workflow that can plan, research, execute, recover, and verify progress toward a long-term engineering goal.