If / else

The two-way branch: a condition over the upstream payload routes execution down the true or false port. The other branch's steps are skipped.

Config

One expression; truthy fires true, falsy fires false.

The condition is an expression with payload bound to the immediate upstream step's output:

payload["amount"] > 1000
payload["status"] == "active" and payload["score"] >= 50
String.contains?(payload["email"] || "", "@example.com")

Bracket access (payload["field"]), comparison/boolean/arithmetic operators, and a small allowlist of helpers (String.*, Map.*, Enum.* without functions, is_nil) are available — it's a small expression sandbox, not a general programming language.

Output

The upstream payload passes through unchanged on whichever port fired — if doesn't transform data, it only routes it.

Patterns

• Threshold gate — big orders to an approval, small ones straight through.
• Found check — after a get from store, branch on payload["found"].
• Error lane — after a step with on-error continue, branch on payload["ok"] to notify on failures.

Gotchas

• Wire both ports. An unwired false branch silently drops every non-matching payload — the run just ends there.
• The condition reads the immediate upstream output only. Pull earlier values forward with set fields first if the decision needs them.
• Per-item filtering of a list is reshape's filter task — if is a single yes/no on the whole payload.