1 files changed, 18 insertions, 0 deletions
diff --git a/src/stdlib/io.ts b/src/stdlib/io.ts
new file mode 100644
index 0000000..00b74b1
--- /dev/null
+++ b/src/stdlib/io.ts
@@ -0,0 +1,18 @@
+export interface EffectAtom<T = unknown> { output: T }
+export type Effect = EffectAtom[]
+
+export interface Kind1<Inp = unknown, Out = unknown> {
+  input: Inp
+  return: Out
+}
+
+export interface Program<Effs extends Effect, ExitCode extends number = 0> {
+  effects: Effs,
+  exitCode: ExitCode,
+}
+
+export interface Bind<Eff extends EffectAtom, Fn extends Kind1> extends EffectAtom {
+  input: Eff
+  chainTo: Fn
+}
+