Most agent-first coding workflows skip an explicit, human-reviewable plan step — which makes it hard to catch bad decisions before code lands. Plannotator inserts a lightweight visual review layer between planning and implementation so teams can inspect, annotate, and either approve or send structured change requests back to the agent.
What Sets It Apart
- Visual plan diffs and inline annotations: view agent steps or code diffs as editable blocks and attach comments or replace/insert operations so feedback is precise and actionable (so what: reduces ambiguity when sending corrections back to an agent).
- Agent integrations and simple CLI hooks: works with Claude Code, OpenCode, Copilot CLI, Pi, and Codex, letting you open the review UI from an agent session or a repository (so what: fits into existing agent-driven workflows with minimal friction).
- Privacy-first sharing: small plans are encoded in the URL hash (no server), while large plans use AES-256-GCM encrypted short links stored server-side as ciphertext the server can't read (so what: teams can share drafts without exposing plaintext to the host).
- Self-hostable and team-friendly: open-source code and docs for self-hosting plus private sharing and importable colleague annotations (so what: teams with compliance needs can run it behind their infrastructure).
Who it's for and tradeoffs
Great fit if you use LLM-based coding agents or CLI plugins and need a lightweight, reviewable step between planning and execution — especially teams that require clear, auditable feedback to agents. It accelerates collaboration where plan-level edits matter more than low-level lint fixes. Look elsewhere if you only need traditional line-by-line PR review tooling (no agent feedback loop) or if you require deep enterprise features (SSO, fine-grained RBAC) out of the box; those can be added but may need extra ops work when self-hosting.
Where it fits
Think of it as the human-in-the-loop layer for agent-driven development: not a full IDE replacement, and not a generic PR system — it complements CI/PR workflows by making an agent's intentions inspectable and editable before implementation.
