Code Node

Run a real Go, Python, or TypeScript function you wrote, wired up as a node.

A Code Node runs a user-defined function from your code project. Unlike every other node kind, it has no inline config fields , its only editable surface is its ports, which are derived directly from the target function’s parameters and return values.

Enable a language

Open Settings → Code Node Languages and toggle on Go, Python, and/or TypeScript. Enabling a language checks that its toolchain actually runs (not just that it’s on PATH) and creates its project folder under code/<lang>/ in the current workspace the first time.

Write the function

There’s no “New Code Node” button , you write the function directly in your editor, following the naming convention for that language:

Go (code/go/nodes.go) , an exported function whose name ends in Node. Only float64/bool/string parameters and results.

func AddNode(a float64, b float64) (sum float64) {
	return a + b
}

Python (code/python/nodes.py) , a top-level function whose name ends in _node, taking exactly one NamedTuple argument and returning exactly one NamedTuple result. Every field must be str/bool/int/float.

class SumNodeInputs(NamedTuple):
    a: float
    b: float

class SumNodeOutputs(NamedTuple):
    sum: float

def sum_node(inputs: SumNodeInputs) -> SumNodeOutputs:
    return SumNodeOutputs(sum=inputs.a + inputs.b)

TypeScript (code/typescript/nodes.ts) , an exported top-level function whose name ends in Node, taking exactly one interface-typed argument and returning exactly one interface-typed result. Every field must be string/boolean/number.

interface SumNodeInputs {
  a: number
  b: number
}

interface SumNodeOutputs {
  sum: number
}

export function sumNode(inputs: SumNodeInputs): SumNodeOutputs {
  return { sum: inputs.a + inputs.b }
}

Save the file , the function shows up as a placeable tile in Add Code Node automatically, no separate register step. Each parameter and each result field becomes its own port.

Add it to the canvas

Press Ctrl/Cmd+Alt+Space for Add Code Node, pick the function from the list, and confirm a display name. Functions already used by another .flo file in the workspace can’t be deleted from this dialog until that reference is removed.

Editing later

Any Code Node’s ⋯ menu has Edit Src , it jumps VS Code straight to that function, cursor already on its name.