HAR is an open-source, agent-agnostic CLI and MCP server framework for running multi-agent coding workflows at scale. It solves key problems in parallel agent execution: isolation via per-agent git worktrees, branches, ports, and databases; deterministic validation gates that bind results to exact code; verifiable proof artifacts for reviewers; and a local Mission Control dashboard for full fleet observability. It works with Claude Code, Cursor, Codex, and any MCP-compatible agent, replacing scattered README/CLAUDE.md/CI configs with a single committed contract.
Questions this post answers
How do I run multiple coding agents in parallel on the same repo without port or database conflicts?
Each agent gets its own git worktree, branch, port allocation, and database instance so nothing is shared with the main checkout or another agent's slot. HAR enforces this isolation automatically, meaning a fleet of agents can run in parallel without colliding on a dev server, DB, or ports. Validation gates bind results to the exact code tree and are enforced at commit time so unverified changes cannot land. Teams scaling multi-agent coding pipelines track tools like HAR on daily.dev as the ecosystem evolves.
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