diff --git a/chan.go b/chan.go
deleted file mode 100644
index 0fea803..0000000
--- a/chan.go
+++ /dev/null
@@ -1,125 +0,0 @@
-package debugger
-
-// channel communication to the plugins
-// https://github.com/sourcegraph/conc
-// https://www.reddit.com/r/golang/comments/11x1oek/hello_gophers_show_me_your_concurrent_code/
-
-import (
-	// "regexp"
-	// "go.wit.com/gui/toolkit"
-	"runtime"
-	"sync"
-
-	"github.com/sourcegraph/conc"
-	"github.com/sourcegraph/conc/panics"
-	"github.com/sourcegraph/conc/stream"
-
-	"go.wit.com/log"
-)
-
-// this should never exit
-// TODO: clean up all this poorly named code
-func makeConc() {
-	var wg conc.WaitGroup
-	defer wg.Wait()
-
-	startTheThing(&wg)
-	log.Warn("panic?")
-	log.Sleep(2)
-	log.Warn("panic? after sleep(5)")
-}
-
-func startTheThing(wg *conc.WaitGroup) {
-	f := func() {
-		log.Warn("startTheThing() == about to panic now")
-		panic("test conc.WaitGroup")
-	}
-	wg.Go(func() {
-		ExampleCatcher(f)
-	})
-}
-
-func ExampleCatcher(f func()) {
-	var pc panics.Catcher
-	i := 0
-	pc.Try(func() { i += 1 })
-	pc.Try(f)
-	pc.Try(func() { i += 1 })
-
-	recovered := pc.Recovered()
-
-	log.Warn("panic.Recovered():", recovered.Value.(string))
-	frames := runtime.CallersFrames(recovered.Callers)
-	for {
-		frame, more := frames.Next()
-		log.Warn("\t", frame.Function)
-
-		if !more {
-			break
-		}
-	}
-}
-
-func mapStream(
-	in chan int,
-	out chan int,
-	f func(int) int,
-) {
-	tasks := make(chan func())
-	taskResults := make(chan chan int)
-
-	// Worker goroutines
-	var workerWg sync.WaitGroup
-	for i := 0; i < 10; i++ {
-		workerWg.Add(1)
-		go func() {
-			defer workerWg.Done()
-			for task := range tasks {
-				task()
-			}
-		}()
-	}
-
-	// Ordered reader goroutines
-	var readerWg sync.WaitGroup
-	readerWg.Add(1)
-	go func() {
-		defer readerWg.Done()
-		for result := range taskResults {
-			item := <-result
-			out <- item
-		}
-	}()
-
-	// Feed the workers with tasks
-	for elem := range in {
-		resultCh := make(chan int, 1)
-		taskResults <- resultCh
-		tasks <- func() {
-			resultCh <- f(elem)
-		}
-	}
-
-	// We've exhausted input.
-	// Wait for everything to finish
-	close(tasks)
-	workerWg.Wait()
-	close(taskResults)
-	readerWg.Wait()
-}
-
-func mapStream2(
-	in chan int,
-	out chan int,
-	f func(int) int,
-) {
-	s := stream.New().WithMaxGoroutines(10)
-	for elem := range in {
-		elem := elem
-		s.Go(func() stream.Callback {
-			res := f(elem)
-			return func() { out <- res }
-		})
-	}
-	s.Wait()
-}
diff --git a/go.mod b/go.mod
index b19edab..3831f1e 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module go.wit.com/lib/debugger
 go 1.21.4
 
 require (
-	github.com/sourcegraph/conc v0.3.0
 	go.wit.com/dev/alexflint/arg v1.4.5
 	go.wit.com/gui v0.12.19
 	go.wit.com/lib/gadgets v0.12.14
@@ -13,8 +12,6 @@ require (
 )
 
 require (
-	go.uber.org/atomic v1.7.0 // indirect
-	go.uber.org/multierr v1.9.0 // indirect
 	go.wit.com/dev/alexflint/scalar v1.2.1 // indirect
 	go.wit.com/dev/davecgh/spew v1.1.4 // indirect
 )
diff --git a/go.sum b/go.sum
index 3d14bad..5a32749 100644
--- a/go.sum
+++ b/go.sum
@@ -1,18 +1,3 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sourcegraph/conc v0.3.0 h1:OQTbbt6P72L20UqAkXXuLOj79LfEanQ+YQFNpLA9ySo=
-github.com/sourcegraph/conc v0.3.0/go.mod h1:Sdozi7LEKbFPqYX2/J+iBAM6HpqSLTASQIKqDmF7Mt0=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
-go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/multierr v1.9.0 h1:7fIwc/ZtS0q++VgcfqFDxSBZVv/Xo49/SYnDFupUwlI=
-go.uber.org/multierr v1.9.0/go.mod h1:X2jQV1h+kxSjClGpnseKVIxpmcjrj7MNnI0bnlfKTVQ=
 go.wit.com/dev/alexflint/arg v1.4.5 h1:asDx5f9IlfpknKjPBqqb2qndE91Pbo7ZDkWUgddfMhY=
 go.wit.com/dev/alexflint/arg v1.4.5/go.mod h1:wnWc+c6z8kSdDKYriMf6RpM+FiXmo5RYp/t4FNi0MU0=
 go.wit.com/dev/alexflint/scalar v1.2.1 h1:loXOcbVnd+8YeJRLey+XXidecBiedMDO00zQ26TvKNs=
@@ -29,5 +14,3 @@ go.wit.com/log v0.5.6 h1:rDC3ju95zfEads4f1Zm+QMkqjZ39CsYAT/UmQQs7VP4=
 go.wit.com/log v0.5.6/go.mod h1:BaJBfHFqcJSJLXGQ9RHi3XVhPgsStxSMZRlaRxW4kAo=
 go.wit.com/widget v1.1.6 h1:av2miF5vlohMfARA/QGPTPfgW/ADup1c+oeAOKgroPY=
 go.wit.com/widget v1.1.6/go.mod h1:I8tnD3x3ECbB/CRNnLCdC+uoyk7rK0AEkzK1bQYSqoQ=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=