Cursor OpenSync Plugin: What it can and cannot track

[waynesutton]

We shipped a sync plugin for Cursor IDE. It works, but has limitations compared to our other plugins.

What the plugin does

cursor-opensync-plugin syncs your Cursor agent sessions to the OpenSync dashboard. You can review prompts, responses, file edits, and tool calls after a session ends.

npm install -g cursor-opensync-plugin
cursor-sync login
cursor-sync setup

Setup configures hooks in ~/.cursor/hooks.json. Sessions sync automatically after that.

What it captures

The plugin uses Cursor's hooks system (available in 1.7+). It observes these events:

• beforeSubmitPrompt: your prompts
• afterAgentResponse: assistant text responses
• afterFileEdit: file modification diffs
• beforeShellExecution: shell commands
• beforeMCPExecution: MCP tool calls
• stop: session completion

What it cannot capture

Token usage, cost data, and model information are not available through the hooks API.

Feature	cursor-sync	codex-sync	claude-code-sync
User prompts	Yes	Yes	Yes
Assistant responses	Yes	Yes	Yes
File edit diffs	Yes	Yes	Yes
Shell commands	Yes	Yes	Yes
MCP tool calls	Yes	Yes	Yes
Token usage	No	Yes	Yes
Cost calculation	No	Yes	Yes
Model info per message	No	Yes	Yes

Why the difference

Codex CLI, Claude Code, and OpenCode store complete session data in local files (JSONL or SQLite). Their sync plugins read these files directly and extract everything.

Cursor's hooks API provides event payloads but does not expose:

• Token counts (input, output, cached)
• Cost information
• Which model generated a response

Cursor has an Analytics API and AI Code Tracking API, but those are Enterprise only and provide aggregated team metrics, not per-session data.

What you get

A searchable history of your Cursor sessions including:

• Prompts and responses
• File changes with diffs
• Shell and MCP tool usage
• Session duration
• Project context

This is useful for reviewing past work or searching across sessions. It does not replace Cursor's built-in usage tracking for cost monitoring.

Links

• npm: https://www.npmjs.com/package/cursor-opensync-plugin
• GitHub: https://github.com/waynesutton/cursor-cli-sync-plugin
• OpenSync: https://opensync.dev/
• Cursor hooks docs: https://cursor.com/docs/agent/hooks

Feedback

Open an issue on GitHub if you run into problems or have suggestions.