Agent trace studio

Visualize Claude Code trajectories as search behavior.

Load native Claude Code JSONL or Galapagos derived exports and see the run as a readable timeline: prompts, assistant turns, tool calls, evaluator feedback, and SFT-ready conversation slices.

Open visualizer Run Claude Code

Supported inputs

Native

claude_sessions/projects/**/*.jsonl

Events

derived/claude_code_events.jsonl

SFT

derived/claude_code_sft.jsonl

Load a trajectory

Paste or upload Claude Code native JSONL, Galapagos event JSONL, or SFT JSONL.

Upload JSONL

{"type":"user","sessionId":"demo-session","timestamp":"2026-07-02T23:16:16.560Z","message":{"role":"user","content":"# Galapagos: Optimization Task\n\nImprove `$GALAPAGOS_WORKSPACE/solution.py` and maximize `combined_score`."}}
{"type":"assistant","sessionId":"demo-session","timestamp":"2026-07-02T23:16:20.000Z","message":{"id":"msg_demo_1","model":"claude-fable-5","role":"assistant","content":[{"type":"text","text":"I'll inspect the current solution and run the baseline evaluation."},{"type":"tool_use","id":"toolu_read","name":"Read","input":{"file_path":"$GALAPAGOS_WORKSPACE/solution.py"}}]}}
{"type":"user","sessionId":"demo-session","timestamp":"2026-07-02T23:16:25.000Z","message":{"role":"user","content":[{"type":"tool_result","tool_use_id":"toolu_read","content":"def construct_packing(): ...","is_error":false}]}}
{"type":"assistant","sessionId":"demo-session","timestamp":"2026-07-02T23:17:00.000Z","message":{"id":"msg_demo_2","model":"claude-fable-5","role":"assistant","content":[{"type":"text","text":"The baseline is weak. I will replace it with a structured optimizer."},{"type":"tool_use","id":"toolu_write","name":"Write","input":{"file_path":"$GALAPAGOS_WORKSPACE/solution.py","content":"# EVOLVE-BLOCK-START\n..."}}]}}

Messages

Claude Code native JSONL

Events

native

Tool calls

1 result events

Sessions

claude-fable-5

Timeline

11:16:16 PM → 11:17:00 PM

native

Selected eventline 1 · 11:16:16 PM

{
  "type": "user",
  "sessionId": "demo-session",
  "timestamp": "2026-07-02T23:16:16.560Z",
  "message": {
    "role": "user",
    "content": "# Galapagos: Optimization Task\n\nImprove `$GALAPAGOS_WORKSPACE/solution.py` and maximize `combined_score`."
  }
}

Conversation

4 messages

user11:16:16 PM

# Galapagos: Optimization Task

Improve `$GALAPAGOS_WORKSPACE/solution.py` and maximize `combined_score`.

assistant11:16:20 PM

I'll inspect the current solution and run the baseline evaluation.

<tool_call name="Read" id="toolu_read">
{
  "file_path": "$GALAPAGOS_WORKSPACE/solution.py"
}
</tool_call>

user11:16:25 PM

<tool_result id="toolu_read" error="false">
def construct_packing(): ...
</tool_result>

assistant11:17:00 PM

The baseline is weak. I will replace it with a structured optimizer.

<tool_call name="Write" id="toolu_write">
{
  "file_path": "$GALAPAGOS_WORKSPACE/solution.py",
  "content": "# EVOLVE-BLOCK-START\n..."
}
</tool_call>