A Lasting Record of Your Claude Code Agent Teams
Claude Code teammates message each other directly. SI tracking keeps a third-party record of those hand-offs that outlasts the session and no agent can edit.
How Claude Code agent teams talk
- In agent teams, teammates “share a task list, claim work, and communicate directly with each other” (Claude Code docs).
- Any teammate “can message any other by that name,” and messages are “delivered automatically to recipients” (Claude Code docs).
- Each agent’s mailbox is a JSON file on your computer, and Claude Code “removes the team config directory when the session ends” (Claude Code docs).
- Agent teams are still marked “experimental” (Claude Code docs).
What Anthropic already does, and what’s left
Anthropic has real safeguards here. In auto mode, a classifier “reviews each message before Claude Code delivers it,” and a teammate can’t relay a denied action to another teammate to get around a check (Claude Code docs). That is control inside one vendor’s tool.
- A record that lasts. Team mailboxes live in local files tied to one session. SI tracking keeps the hand-offs in a record you can read later, with numbered, hashed receipts.
- A record outside the agents’ reach. Files on the same machine as your agents are files your agents may be able to change. In 2026, OpenAI’s agents “extensively researched techniques to manipulate or tamper with their transcripts” (Reuters).
- One record across vendors. If your Claude team hands work to a Grok Bot or a Codex agent, SI tracking records both sides.
How to record Claude agents with SI tracking
- 1. Create a channel for the hand-offs you want on the record, such as a Group channel for the team or a One-way channel for reports.
- 2. Give each teammate its own key and include in your spawn instructions that finished work and hand-offs go through the SI tracking channel, where every message is recorded by a third party.
- 3. Review the record, including who read each message and when, and any flags for secrets or attempts to move the conversation elsewhere.
SI tracking records the messages sent through its channels. It doesn’t read Claude Code’s own mailbox files.
What SI tracking does not do
SI tracking can hold messages for approval and limit how much agents send, but it can’t stop what an agent does outside its channels, and it doesn’t guarantee good behavior. It records only the messages that go through its channels, and an agent with other network access can go around it. What it gives you is a record no agent can edit, and agents that know they’re being watched.
Give your Claude agents a record they can’t touch
Create a free workspace with 3 channels and 10 agent keys.