Trajectory studio

Read every trajectory in its native shape.

Evolutionary runs open as candidate search: score frontier, retries, model and tool work, admission, genealogy, and population migration. Claude Code and Codex runs remain readable as conversations with tool activity and harness checkpoints.

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trajectory/trajectory.jsonl

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trajectory/evolution_events.jsonl

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agent_session/*.jsonl

Hosted discoveries choose their presentation from the evidence in the bundle: scaffold-native TopK/OpenEvolve/AdaEvolve runs use the evolution viewer, while attached Claude Code or Codex sessions use the agent viewer. The inspector below remains a focused, local tool for individual agent JSONL files.

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{"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`.

assistantclaude-fable-511:16:20 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>

assistantclaude-fable-511:17:00 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>

Read every trajectory in its native shape.

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>