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Agents playbook

€39 once

Practice for tool calling, the agent loop, permissions, and the ways a loop fails. Each concept is planned as one worked example, one checklist, and one change in a prompt or repo you already have. No set in this playbook is written yet.

Coming soon. This playbook is not for sale on this site. The email links open a message to support@buildsparkai.com with the tier and the track in the subject. There is no form and no payment.

Planned sets

One set per concept below: a worked example, a checklist, and one change in a prompt or repo you already have. None of those sets are written yet.

Cards this playbook sits beside

These are the concept cards. The cards are free. Five cards on this track are live. A coming soon name is not a card yet.

• Agent loop Live Free card

  A cycle of model step, tool result, and another model step, until a stop.

• Tool calling Live Free card

  The model asks your code to run a named function, then reads the result.

• Tool design/MCP Live Free card

  How a tool is named, described, and exposed, including over MCP.

• Context engineering Live Free card

  Deciding what goes into the window for this step, and what stays out.

• Memory Coming soon Free card

  State kept across turns or sessions so the loop does not start from zero.

• Planning Coming soon Free card

  Breaking a job into steps before or during the loop.

• Prompt injection Live Free card

  Untrusted text that tries to override the instruction or the tool rules.

• Permissions & human-in-the-loop Coming soon Free card

  What the agent may do alone, and what waits for a person.

• Guardrails Coming soon Free card

  Checks that block or reshape an action or a reply before it lands.

• Failure modes Coming soon Free card

  How an agent loop stalls, loops, or acts on a bad tool result.

• Agent evaluation Coming soon Free card

  Scoring an agent on tasks, including whether it used tools well.

• Multi-agent Coming soon Free card

  More than one agent, with a handoff or a shared task.

Join the waitlist Founding member, about 30% off

See the other tiers on Pricing, or the concept list on the Agents track.