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How to review what each Claude Code subagent brought back with Agentplay

Use subagent lanes and the agent lens to see how each subagent in a Claude Code session contributed.

Who it is forA developer who runs Claude Code with subagents and wants to know which ones returned useful results.

The problemSubagent work is easy to lose in a long session, so it is unclear which subagents contributed and which came back empty.

The outcomeA per-subagent view of the session showing each subagent's work in its own lane and its position in the timeline.

What you need first

  • Python 3.11 or newer
  • uv, pipx, or pip to run agentplay
  • Existing session transcripts from a supported agent such as Claude Code, Codex, or Cursor on the same machine

Steps

  1. Run uvx agentplay to build maps and open the viewer.
  2. Open a Claude Code session that used subagents.
  3. Select a single subagent with the agent lens so the explorer re-scopes to it.
  4. Play the timeline to see what that subagent read, edited, and produced.

Prompt for your agent

Using the agentplay repo at https://github.com/Entelligence-AI/agentplay, run `uvx agentplay`, open the Claude Code session <session name or id>, and use the agent lens to scope to each subagent. Report which subagents produced edits or outputs and which came back with nothing. Verify by checking each subagent lane against its entries on the timeline.

Caveat. Subagent prompts and descriptions are not recorded, so you can see what each subagent did but not the instructions it was given.

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