Add a Plan/Todo System to Your Agent

Give your agent the planning discipline of the leading harnesses: an explicit, model-visible todo list that survives long tasks.

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Chain

Inputs

Step 1

flow-add-plan-todo-system-agent-1-design-the-todo-data-model-and-tool

Step 2

flow-add-plan-todo-system-agent-2-render-the-plan-into-context-every-turn

Step 3

flow-add-plan-todo-system-agent-3-enforce-plan-first-and-completion-gates

Step 4

flow-add-plan-todo-system-agent-4-test-the-full-planning-lifecycle

Final output

No inputs required — hit Run to stream each step in order.

Each step streams from its model and feeds the next. BYOK — you pay your provider directly. Add a key in Settings if a step needs one.

Step 1 · Structured plans beat prose plans because the harness can enforce them.

flow-add-plan-todo-system-agent-1-design-the-todo-data-model-and-tool

Claude Sonnet 4.6→ {{step_1}}

Awaiting upstream steps…

Step 2 · A plan the model cannot see is a plan it will not follow.

flow-add-plan-todo-system-agent-2-render-the-plan-into-context-every-turn

Claude Sonnet 4.6→ {{step_2}}

Awaiting upstream steps…

Step 3 · The two gates that turn a todo list into reliability.

flow-add-plan-todo-system-agent-3-enforce-plan-first-and-completion-gates

Claude Sonnet 4.6→ {{step_3}}

Awaiting upstream steps…

Step 4 · Prove the plan survives execution, failure, and resumption.

flow-add-plan-todo-system-agent-4-test-the-full-planning-lifecycle

Claude Sonnet 4.6→ {{step_4}}

Awaiting upstream steps…

Give your agent the planning discipline of the leading harnesses: an explicit, model-visible todo list that survives long tasks.

1
Structured plans beat prose plans because the harness can enforce them.
Runs flow-add-plan-todo-system-agent-1-design-the-todo-data-model-and-tool on Claude Sonnet 4.6
2
A plan the model cannot see is a plan it will not follow.
Runs flow-add-plan-todo-system-agent-2-render-the-plan-into-context-every-turn on Claude Sonnet 4.6
3
The two gates that turn a todo list into reliability.
Runs flow-add-plan-todo-system-agent-3-enforce-plan-first-and-completion-gates on Claude Sonnet 4.6
4
Prove the plan survives execution, failure, and resumption.
Runs flow-add-plan-todo-system-agent-4-test-the-full-planning-lifecycle on Claude Sonnet 4.6

•Recurring tasks you currently copy-paste between tools.
•When a single prompt isn't enough — you need a chain where output(n) feeds prompt(n+1).
•Fork and adapt if your inputs differ materially from the author's use case.

Claude Sonnet 4.6