(new): rich message support

(fix): runtime reliability
(tests): regression coverage
(doc): v1.1 release notes

runners.go

@@ -2,6 +2,7 @@ package laniakea
 
 import (
 	"context"
+	"fmt"
 	"time"
 )
 
@@ -27,6 +28,18 @@ type Runner[T AppData] struct {
 	fn    RunnerFn[T]   // The function to execute
 }
 
+func executeRunner[T AppData](runner Runner[T], bot *Bot[T]) (err error) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			err = fmt.Errorf("runner %q panicked: %v", runner.name, recovered)
+		}
+	}()
+	if runner.fn == nil {
+		return fmt.Errorf("runner %q has no function", runner.name)
+	}
+	return runner.fn(bot)
+}
+
 // NewRunner creates a new Runner with the given name and function.
 //
 // The default configuration is async=true and every=0, i.e. a one-shot
@@ -34,12 +47,7 @@ type Runner[T AppData] struct {
 // to customize this. Do not call builder methods concurrently or after the
 // bot runtime has begun executing runners.
 func NewRunner[T AppData](name string, fn RunnerFn[T]) Runner[T] {
-	return Runner[T]{
-		name:  name,
-		fn:    fn,
-		async: true,
-		every: 0,
-	}
+	return Runner[T]{name: name, fn: fn, async: true, every: 0}
 }
 
 // Async sets whether the runner executes synchronously or asynchronously.
@@ -89,7 +97,7 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 			go func(r Runner[T]) {
 				defer bot.runnerOnceWG.Done()
 				startedAt := time.Now()
-				err := r.fn(bot)
+				err := executeRunner(r, bot)
 				bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 					Name:     r.name,
 					Duration: time.Since(startedAt),
@@ -109,7 +117,7 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 		} else if runner.every == 0 && !runner.async {
 			// One-time sync: block until done
 			t := time.Now()
-			err := runner.fn(bot)
+			err := executeRunner(runner, bot)
 			elapsed := time.Since(t)
 			bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 				Name:     runner.name,
@@ -150,7 +158,7 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 						return
 					}
 					startedAt := time.Now()
-					err := r.fn(bot)
+					err := executeRunner(r, bot)
 					bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 						Name:     r.name,
 						Duration: time.Since(startedAt),