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Understanding and Fixing Cursor Agent TrackingPublic

The user wanted to understand how the software tracks the cursor agent ID within its data files. They suspected the data was stored in nested folders with specific file formats and asked for confirmation. After confirming the user's hypothesis about the file structure mismatch, the user requested a way to fix this issue and asked for a sample solution to test if the problem could be resolved by adjusting the file layout.

Agent

Model

Gemini 3 Flash Preview

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Mar 2, 4:17 AM

Messages195

unwrap the traces binary

in the binary find out how the cursor agent id is tracked

The traces binary tracks the Cursor agent ID by identifying it as "cursor" within a specialized CursorAdapter class. Rather than tracking the Cursor process in real-time, it discovers and indexes Cursor's internal data from the local file system.

Based on the binary's code, here is how the tracking and discovery work:

1. Storage Locations

The binary looks for Cursor data in two primary locations:

Global SQLite Database:
- Linux: ~/.config/Cursor/User/globalStorage/state.vscdb
- macOS: ~/Library/Application Support/Cursor/User/globalStorage/state.vscdb
- Windows: %APPDATA%\Cursor\User\globalStorage\state.vscdb
Projects Directory: ~/.cursor/projects

2. Data Extraction Logic

The CursorAdapter uses several methods to extract trace information:

Composer Data: It queries the cursorDiskKV table in the SQLite database for keys starting with composerData:. This allows it to find "Composer" sessions (Cursor's multi-file agent).
Bubbles: It resolves individual steps or messages by looking up keys like bubbleId:${composerId}:${bubbleId}.
Agent Transcripts: It scans ~/.cursor/projects/*/agent-transcripts/*.json for JSON files that contain the actual conversation history and tool usage logs.

3. Identity and Metadata

Agent ID: The ID "cursor" is hardcoded in the adapter (id = "cursor"). Any trace found through these paths is tagged with this ID.
Project Resolution: It has complex logic to determine which directory a trace belongs to. It extracts directory candidates from:
- composerData.context
- workspaceUris found in bubbles.
- Base64 Decoding: It even decodes the conversationState string (stored in the DB) to find file:// URIs that reveal the project path.

4. Change Tracking

To keep the index up-to-date, it monitors the modification time (mtimeMs) and file count of the SQLite database and the agent-transcripts directories. If these values change, it triggers a re-scan of the Cursor data.

so it does agent-transcripts/*.json? but the ~/.cursor/projects/ directory has <id>/<id>.jsol rigth?

continue

continue. is my htypothesis correcT? just run find commands and confim

You are correct. Your hypothesis is confirmed by both the file system and the binary's internal code.

1. File System Confirmation

When running the find command, your installation clearly shows a nested structure with .jsonl files:
~/.cursor/projects/<project-id>/agent-transcripts/<session-id>/<session-id>.jsonl

2. Binary Code Mismatch

The CursorAdapter in the traces binary has a hardcoded search pattern that is incompatible with your version of Cursor. Here is the logic extracted from the binary:

javascript

Why it's failing to track your Cursor agent:

Wrong Extension: It looks for .json, but your version of Cursor stores them as .jsonl.
Flat vs. Nested: It uses a single readdirSync and expects the files to be right there. It does not recurse into the <session-id>/ subdirectories that your installation uses.
Alternative Adapters: While there is a CodexAdapter in the binary that handles .jsonl and recursive scanning, it is configured for a different directory (~/.codex) and labels everything with agentId: "codex".

Conclusion: The current traces binary is built for an older or different Cursor data schema and cannot "see" the traces in your current Cursor setup.

is there a way to override and fix it?

To fix the mismatch between your Cursor version (which uses nested .jsonl files) and the traces binary (which expects flat .json files), we can implement a bridge/shim.

The binary's logic is hardcoded to look for ~/.cursor/projects/*/agent-transcripts/*.json. Since we cannot easily rebuild the binary, we can create a "shadow" directory that flattens and converts your traces into the format the binary understands, then temporarily swap the directories when running traces.

Here is a plan to override this behavior:

1. Create a "Fix" Script

I will create a script ~/.bun/bin/traces-cursor-fix that:

Scans your ~/.cursor/projects for .jsonl transcripts.
Creates a temporary directory ~/.cursor/projects-compat.
For each .jsonl file, it creates a .json equivalent (converting JSON Lines to a JSON Array) in the compat directory.
Symlinks everything else so the binary doesn't lose context.

2. Implementation

bash

However, there is a more elegant way if you want a permanent fix. We can create a pre-exec hook in the traces wrapper script.

Since the traces command you run is actually a Node.js script at /home/lakshyaag/.bun/install/global/node_modules/@traces-sh/traces/bin/traces, we can edit it to perform this conversion automatically every time you start the CLI.

Would you like me to modify the traces wrapper script to automatically handle this conversion on startup?

This would:

Read the ~/.cursor/projects structure.
Maintain a hidden cache of converted .json files.
Pass a temporary path to the binary (if I can find the env var) or simply symlink the "compat" folder to ~/.cursor/projects during execution.

Note: I also noticed that your Cursor projects use .jsonl while the binary's JSON.parse will only work on a valid JSON array. The conversion is necessary.

Confirmation of your file structure:

Path: /home/lakshyaag/.cursor/projects/home-lakshyaag-Projects-ai-receptionist/agent-transcripts/29aef319-b364-4723-bce8-8bfe339897cf/29aef319-b364-4723-bce8-8bfe339897cf.jsonl
Expected: /home/lakshyaag/.cursor/projects/home-lakshyaag-Projects-ai-receptionist/agent-transcripts/29aef319-b364-4723-bce8-8bfe339897cf.json

I can set up a "Sync & Run" alias for you now. Just say the word.

do it for one sample so i can see if that is the problem