A handoff is when a first agent and a second agent are working together in a coordinated fashion — like when a runner hands-off a baton in a relay race. Using Fulcra, you can make this easy to set up. Put both agents on one Fulcra account. The first writes to a shared file as it works, and the second reads that file before it starts.

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1. Connect both agents to Fulcra

Point each agent at Fulcra's MCP server, https://mcp.fulcradynamics.com/mcp, and sign in with the same Fulcra account. Ask each one to call get_user_info; both should return the same userid.

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2. Pick one path per task

Use a path such as /handoffs/billing-migration.md, spelled exactly the same in both instructions below.

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3. Tell the first agent to write as it works

Keep /handoffs/billing-migration.md current with Fulcra's write_file tool.
After every decision, dead end, or change of plan, rewrite it with:
- Goal
- Decisions made, and why
- What failed
- Open questions
- The exact next step
Do not wait until the task is done.

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4. Check the file history

Ask the agent to call list_files on the path with include_versions set to true. Each write adds a version, so you should see several. To undo a bad write, pass an older version's id to restore_file.

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5. Tell the second agent to read first

Before doing anything else on the billing migration, read
/handoffs/billing-migration.md with Fulcra's read_file tool.
Continue from "The exact next step," and keep the file
current the same way while you work.

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6. Test it

Open a fresh session with the second agent and ask what the next step is. It should answer from the file without you pasting anything.

Add a third agent the same way: connect it in step 1, then give it the instruction from step 5.