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Custom Agents

Create your own agents and route work to the right custom agent.

Custom Agents

Custom agents let you turn repeatable work into a reusable agent in Cofounder.

Use a custom agent when the same kind of work shows up again and you want it handled with the same instructions, tools, and output format each time.

When To Add A Custom Agent

Use a custom agent when the task is:

  • Repeated often
  • Owned by a clear specialty
  • Best handled with the same instructions every time
  • Dependent on a known set of tools or approvals
  • Easier to automate with a focused workflow than with a general-purpose agent

Custom agents are a good fit for work such as:

  • A marketing agent that writes campaign briefs and updates launch docs
  • An engineering agent that follows your review and testing process
  • An operations agent that collects data and prepares status updates

Common Workflows

Create a custom agent

  1. Open Canvas and use the + button to add a new agent.
  2. Give the agent a clear name and purpose.
  3. Add the instructions, model, skills, and tools it should use.
  4. Save it as a reusable agent.

Use names that describe the job, not the underlying model. For example, Launch Planner, QA Reviewer, or Support Triage Agent are easier to understand than a generic label.

Route work to the right agent

Cofounder can automatically match work to the most appropriate custom agent in your workspace.

  • A support request can go to a support agent
  • A launch request can go to a marketing agent
  • A test failure can go to a QA or engineering agent

Automatic matching works best when each agent has a clear purpose and a distinct scope.

Customize A Custom Agent

The agent editor lets you configure the agent's main working contract.

Depending on the agent, you can set:

  • the agent name
  • custom instructions
  • model choice
  • connected apps
  • scheduled tasks

Refine the instructions

Instructions are the most direct way to shape how an agent behaves.

Use them to define:

  • The agent’s role
  • The expected result
  • The tone and format
  • Decision rules
  • What to do when information is missing

Add skills

Skills extend an agent with repeatable behaviors for a specific kind of work.

Use skills when the agent needs to:

  • Follow a checklist
  • Format output in a specific way
  • Apply a known process
  • Handle a recurring task with the same steps each time

Connect the right tools

Custom agents work best when they can access the tools they actually need.

For example, an agent might use:

  • GitHub, Linear, Vercel, or Supabase for engineering work
  • Notion, Google Docs, Google Drive, or Airtable for content and planning work
  • Slack, Gmail, or Intercom for support and communication workflows
  • Stripe, Metabase, PostHog, or Attio for billing, reporting, and go-to-market work

Routines And Scheduled Tasks

Routines are repeating jobs for an agent.

Use a routine when the same agent should check in on a schedule, such as every morning, every weekday, or every week.

One agent can have multiple routines. For example, the same operations agent might run a daily status update, a weekly metrics review, and a monthly cleanup checklist.

Each routine can have its own:

  • title
  • instructions
  • cadence
  • optional criteria for when it should actually run
  • last result summary
  • next focus
  • enabled or paused state

Agents can suggest routines when they notice work that repeats, but they should ask before creating or changing one.

You can also manage routines yourself from the agent editor. You can add a routine, edit it, pause it, resume it, delete it, or run it once. If a routine has criteria, Check now checks whether there is something useful to do before starting the agent.

Use separate routines when the timing, instructions, criteria, or expected output are different, even if the same agent should do the work.

Next Steps