subagent-lifecycle-logger

Audit trail for subagent invocations using SubagentStart and SubagentStop lifecycle hooks. Every time Claude spawns or finishes a subagent, a timestamped JSON entry is appended to .claude/agent-log.jsonl - recording the agent name, event…

Settings
Hooks
5

What it does and how to use it

A ready-made configuration that tunes Claude Code's behavior (hooks) to your liking.

Copy the configuration (command above).
Paste it into your Claude Code settings file.
Restart the session to apply it.

Install (Claude Code)

mkdir -p .claude/settings && curl -fsSL https://doutorai.pt/data/lib/settings__subagent-lifecycle-logger.md -o .claude/settings/subagent-lifecycle-logger.json

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

{
  "description": "Audit trail for subagent invocations using SubagentStart and SubagentStop lifecycle hooks. Every time Claude spawns or finishes a subagent, a timestamped JSON entry is appended to .claude/agent-log.jsonl - recording the agent name, event type, and ISO timestamp. Provides an offline, zero-dependency log for debugging multi-agent workflows, tracking which agents ran and in what order, and estimating AI usage per session.",
  "hooks": {
    "SubagentStart": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "mkdir -p .claude && print

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