feat: add OPENCODE_NO_NOTIFY env var to suppress notifications

When opencode is invoked programmatically from an external harness
(build orchestrators, CI pipelines, automation tools), desktop
notifications are unhelpful and disruptive. Example: worktrunk
(wt step commit) calls opencode run to generate commit messages —
these sessions send "Ready for review" notifications that are pure
noise since no human is waiting for them.

Setting OPENCODE_NO_NOTIFY=1 or OPENCODE_NO_NOTIFY=true disables
all notification types by returning an empty plugin at init time.
This is opt-in — existing behavior is unchanged when the env var
is not set.

Author: christophkroeppl

src/notify.ts

@@ -486,6 +486,11 @@ async function handleQuestionAsked(
 // ==========================================
 
 export const NotifyPlugin: Plugin = async (ctx) => {
+	// When invoked programmatically from a harness, suppress all notifications
+	if (process.env.OPENCODE_NO_NOTIFY === "1" || process.env.OPENCODE_NO_NOTIFY === "true") {
+		return {}
+	}
+
 	const { client } = ctx
 
 	// Load config once at startup