@plannotator/opencode

Annotate plans. Not in the terminal.

Interactive Plan Review for OpenCode. Select the exact parts of the plan you want to change—mark for deletion, add a comment, or suggest a replacement. Feedback flows back to your agent automatically.

Obsidian users can auto-save approved plans to Obsidian as well. See details

Install

Add to your opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["@plannotator/opencode@latest"]
}

Restart OpenCode. By default, the submit_plan tool is available to OpenCode's plan agent, not to build or other primary agents.

Slash commands: Run the install script to get /plannotator-review, /plannotator-annotate, and /plannotator-last:

curl -fsSL https://plannotator.ai/install.sh | bash

This also clears any cached plugin versions.

Workflow Modes

Plannotator supports four OpenCode workflows:

• plan-agent (default): submit_plan is available to OpenCode's built-in plan agent plus any extra agents listed in planningAgents. This keeps Plannotator integrated with OpenCode plan mode without nudging build to call it.
• manual: submit_plan is not registered. Use /plannotator-last, /plannotator-annotate, /plannotator-review, and /plannotator-archive when you want Plannotator.
• user-managed: submit_plan is registered but no prompts or agent permissions are modified. You manage which agents can call submit_plan via OpenCode's native agent configuration.
• all-agents: legacy broad behavior. Primary agents can see and call submit_plan.

Default config:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    ["@plannotator/opencode@latest", {
      "workflow": "plan-agent",
      "planningAgents": ["plan"]
    }]
  ]
}

If you use other OpenCode plugins, keep everything in one plugin array and attach Plannotator's options directly to the Plannotator entry:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    ["@plannotator/opencode@latest", {
      "workflow": "plan-agent",
      "planningAgents": ["plan", "sisyphus"]
    }],
    "@tarquinen/opencode-dcp@latest",
    "octto",
    "oh-my-opencode-slim"
  ]
}

Do not put { "workflow": "plan-agent" } as its own item in the plugin array. OpenCode plugin entries must be either a plugin string or a two-item array like [pluginName, options].

Restore the old broad behavior:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    ["@plannotator/opencode@latest", {
      "workflow": "all-agents"
    }]
  ]
}

Use commands only:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    ["@plannotator/opencode@latest", {
      "workflow": "manual"
    }]
  ]
}

Register the tool but manage prompts and permissions yourself:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    ["@plannotator/opencode@latest", {
      "workflow": "user-managed"
    }]
  ]
}

How It Works

1. The configured planning agent calls submit_plan → Plannotator opens in your browser
2. Select text → annotate (delete, replace, comment)
3. Approve → Agent proceeds with implementation
4. Request changes → Annotations sent back as structured feedback

Features

• Visual annotations: Select text, choose an action, see feedback in the sidebar
• Runs locally: No network requests. Plans never leave your machine.
• Private sharing: Plans and annotations compress into the URL itself—share a link, no accounts or backend required
• Plan Diff: See what changed when the agent revises a plan after feedback
• Annotate last message: Run /plannotator-last to annotate the agent's most recent response
• Annotate files, folders, and URLs: Run /plannotator-annotate when you want manual review of an artifact
• Obsidian integration: Auto-save approved plans to your vault with frontmatter and tags

Environment Variables

| Variable | Description | |----------|-------------| | PLANNOTATOR_REMOTE | Set to 1 / true for remote mode, 0 / false for local mode, or leave unset for SSH auto-detection. Uses a fixed port in remote mode; browser-opening behavior depends on the environment. | | PLANNOTATOR_PORT | Fixed port to use. Default: random locally, 19432 for remote sessions. | | PLANNOTATOR_BROWSER | Custom browser to open plans in. macOS: app name or path. Linux/Windows: executable path. | | PLANNOTATOR_SHARE_URL | Custom share portal URL for self-hosting. Default: https://share.plannotator.ai. | | PLANNOTATOR_PASTE_URL | Custom paste service URL for self-hosting. Default: https://plannotator-paste.plannotator.workers.dev. | | PLANNOTATOR_PLAN_TIMEOUT_SECONDS | Timeout for submit_plan review wait. Default: 345600 (96h). Set 0 to disable timeout. |

Devcontainer / Docker

Works in containerized environments. Set the env vars and forward the port:

{
  "containerEnv": {
    "PLANNOTATOR_REMOTE": "1",
    "PLANNOTATOR_PORT": "9999"
  },
  "forwardPorts": [9999]
}

If nothing opens automatically, open http://localhost:9999 when submit_plan is called.

See devcontainer.md for full setup details.

Obsidian Integration

Save approved plans directly to your Obsidian vault.

1. Open Settings in Plannotator UI
2. Enable "Obsidian Integration" and select your vault
3. Approved plans save automatically with:
   • Human-readable filenames: Title - Jan 2, 2026 2-30pm.md
   • YAML frontmatter (created, source, tags)
   • Auto-extracted tags from plan title and code languages
   • Backlink to [[Plannotator Plans]] for graph view

Links

• Website
• GitHub
• Claude Code Plugin

License

Copyright 2025 backnotprop Licensed under MIT or Apache-2.0.