Graphs - cognis

Graph examples enact recognizable workflows on top of Graph<S>. Sources under examples/graphs/.

Name	Scenario	Source
`graphs_state_machine`	Polling loop — check up to 5 times whether an external job is done; give up if not.	src
`graphs_with_checkpoints`	Resumable 5-step ETL pipeline — extract / validate / transform / load / notify, snapshot per step.	src
`graphs_interrupts`	HITL pause-for-approval — agent drafts an email, graph stops before the `send` node so a reviewer can approve.	src
`graphs_semantic_router`	Customer-support intent routing — `"refund"` → refund_flow, `"cancel"` → cancel_flow, else general help.	src
`graphs_topic_channels`	Onboarding agent that collects (name, hobbies, todo) across turns — reducers per field (last_value vs. append).	src

How to run

Most graph examples are offline (no LLM needed):

cargo run -p cognis-examples --example graphs_state_machine
cargo run -p cognis-examples --example graphs_with_checkpoints
cargo run -p cognis-examples --example graphs_interrupts

See also

Graphs and state

The user guide.

Checkpointing

Time travel and resume.

Patterns → HITL approval

Interrupts in a real flow.