diff --git a/docs/reference/config.md b/docs/reference/config.md
index 3c41e3f9..05d42ca1 100644
--- a/docs/reference/config.md
+++ b/docs/reference/config.md
@@ -7,8 +7,7 @@ the browser) edit the `ui:` options in place, comments kept.
 
 A bad value keeps its default and is reported; an unknown key warns with a
 "did you mean". One value where a list goes (`projects: ABC`) is a list of
-one. An existing `~/.config/jiratui` or matterbox config (its `jira:` and
-`ui:`) is picked up as a fallback.
+one. An existing `~/.config/jiratui` config is picked up as a fallback.
 
 ## Jira
 
diff --git a/docs/reference/rules.md b/docs/reference/rules.md
index 5c87ba8f..4f69613b 100644
--- a/docs/reference/rules.md
+++ b/docs/reference/rules.md
@@ -38,8 +38,7 @@ issue's changelog shows someone else made: never on yours, and never on
 their own writes coming back on the next refresh. A transition to the
 status the issue has does nothing; one its workflow doesn't offer is logged.
 
-A bad rule is skipped and reported. A matterbox config's `rules:` are
-ignored.
+A bad rule is skipped and reported.
 
 ## Watch a search
 
diff --git a/internal/config/config.go b/internal/config/config.go
index 96a48421..29ab563a 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -1,6 +1,5 @@
 // Package config loads the Jira connection from
-// ~/.config/laneway/config.yaml, falling back to the old jiratui name and
-// then the jira: section of matterbox's config so an existing setup just works.
+// ~/.config/laneway/config.yaml, falling back to the old jiratui name.
 package config
 
 import (
@@ -24,7 +23,7 @@ import (
 	"github.com/cornedor/laneway/internal/rules"
 )
 
-// JiraConfig is matterbox's jira: section.
+// JiraConfig is the jira: section.
 type JiraConfig struct {
 	// Name labels the default site (jira:) in the site pickers and the web
 	// header; sites: entries are labelled by their key.
@@ -461,7 +460,6 @@ func Load(path string) (Config, string, error) {
 		candidates = []string{
 			filepath.Join(d, "laneway", "config.yaml"),
 			filepath.Join(d, "jiratui", "config.yaml"),
-			filepath.Join(d, "matterbox", "config.yaml"),
 		}
 	}
 	for _, p := range candidates {
@@ -473,19 +471,9 @@ func Load(path string) (Config, string, error) {
 			return Config{}, p, err
 		}
 		var c Config
-		if filepath.Base(filepath.Dir(p)) == "matterbox" {
-			// Its rules: are chat rules; only jira: and ui: carry over.
-			var mb struct {
-				Jira JiraConfig `yaml:"jira"`
-				UI   UIConfig   `yaml:"ui"`
-			}
-			c.Warnings, err = decode(raw, &mb)
-			c.Jira, c.UI = mb.Jira, mb.UI
-		} else {
-			c.Warnings, err = decode(raw, &c)
-			c.Warnings = append(unknownKeys(raw), c.Warnings...)
-			c.Warnings = append(c.Warnings, people.Check(c.Jira.Pickers)...)
-		}
+		c.Warnings, err = decode(raw, &c)
+		c.Warnings = append(unknownKeys(raw), c.Warnings...)
+		c.Warnings = append(c.Warnings, people.Check(c.Jira.Pickers)...)
 		if err != nil {
 			return Config{}, p, fmt.Errorf("%s: %w", p, err)
 		}
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 57463793..6a508f01 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -44,21 +44,6 @@ func TestLoadFallsBackToJiratui(t *testing.T) {
 	}
 }
 
-// TestMatterboxRulesIgnored: matterbox's rules: are chat rules, not ours.
-func TestMatterboxRulesIgnored(t *testing.T) {
-	home := t.TempDir()
-	t.Setenv("XDG_CONFIG_HOME", home)
-	t.Setenv("HOME", home)
-	d, _ := os.UserConfigDir()
-	p := filepath.Join(d, "matterbox", "config.yaml")
-	_ = os.MkdirAll(filepath.Dir(p), 0o700)
-	_ = os.WriteFile(p, []byte("jira:\n  base_url: https://x.test\nrules:\n  - match: {channel: Ops, frequency: {count: 3}}\n    actions: [{type: send, text: hi}]\n"), 0o600)
-	c, _, err := Load("")
-	if err != nil || c.Jira.BaseURL != "https://x.test" || c.Rules != nil {
-		t.Errorf("Load = %+v rules %v, %v", c.Jira, c.Rules, err)
-	}
-}
-
 func TestRequestTimeout(t *testing.T) {
 	for in, want := range map[string]time.Duration{"": 0, "45s": 45 * time.Second, " 1m ": time.Minute} {
 		if got, err := (JiraConfig{Timeout: in}).RequestTimeout(); err != nil || got != want {
diff --git a/internal/i18n/nl/go-rest.json b/internal/i18n/nl/go-rest.json
index 7cb47a02..fc1e2217 100644
--- a/internal/i18n/nl/go-rest.json
+++ b/internal/i18n/nl/go-rest.json
@@ -145,7 +145,7 @@
   "commented": "reageerde",
   "commit-msg: refuse keys Jira doesn't know": "commit-msg: weiger sleutels die Jira niet kent",
   "config file": "configbestand",
-  "config file (default ~/.config/laneway/config.yaml, then jiratui's and matterbox's)": "configbestand (standaard ~/.config/laneway/config.yaml, dan die van jiratui en matterbox)",
+  "config file (default ~/.config/laneway/config.yaml, then jiratui's)": "configbestand (standaard ~/.config/laneway/config.yaml, dan die van jiratui)",
   "config file to write (default ~/.config/laneway/config.yaml)": "configbestand om te schrijven (standaard ~/.config/laneway/config.yaml)",
   "couldn't check %s: %v": "kon %s niet controleren: %v",
   "create: %q is not safe to hand to a command": "create: %q is niet veilig om aan een commando mee te geven",
@@ -258,7 +258,6 @@
   "summary can't be empty": "samenvatting mag niet leeg zijn",
   "that agent is gone": "die agent is weg",
   "the agent waits on an approval or question: answer it in its terminal": "de agent wacht op een goedkeuring of vraag: beantwoord die in zijn terminal",
-  "the config in use is matterbox's (%s), whose sites laneway doesn't read; copy its jira: to a laneway config (-config) first": "de gebruikte config is die van matterbox (%s), waarvan laneway de sites niet leest; kopieer de jira: eerst naar een laneway-config (-config)",
   "the end must be a day after today": "het einde moet een dag na vandaag zijn",
   "the file must be .woff2, .woff, .ttf or .otf": "het bestand moet .woff2, .woff, .ttf of .otf zijn",
   "the keyring refused it (%s); keeping it in the file": "de sleutelhanger weigerde het (%s); het blijft in het bestand",
diff --git a/main.go b/main.go
index 72e2dee6..eb7560d8 100644
--- a/main.go
+++ b/main.go
@@ -31,7 +31,7 @@ var version = "dev"
 
 func main() {
 	showVersion := flag.Bool("version", false, i18n.T("print the version and exit"))
-	cfgPath := flag.String("config", "", i18n.T("config file (default ~/.config/laneway/config.yaml, then jiratui's and matterbox's)"))
+	cfgPath := flag.String("config", "", i18n.T("config file (default ~/.config/laneway/config.yaml, then jiratui's)"))
 	site := flag.String("site", "", i18n.T("Jira site from the config's sites: (default the one last picked with @, else jira:)"))
 	demoFlag := flag.Bool("demo", false, i18n.T("try laneway on a generated project, without Jira; writes are kept in memory (-config: its ui: only)"))
 	flag.Parse()
diff --git a/setup.go b/setup.go
index 912e6a78..0005ec46 100644
--- a/setup.go
+++ b/setup.go
@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"path/filepath"
 	"strings"
 	"time"
 
@@ -146,9 +145,6 @@ func setupSite(ctx context.Context, cfgPath, site string, p prompter, verify fun
 		}
 		j.BaseURL = known.BaseURL
 	}
-	if filepath.Base(filepath.Dir(path)) == "matterbox" {
-		return "", fmt.Errorf(i18n.T("the config in use is matterbox's (%s), whose sites laneway doesn't read; copy its jira: to a laneway config (-config) first"), path)
-	}
 	first := errors.Is(err, config.ErrNoConfig) || cfg.Jira.BaseURL == "" && len(cfg.Sites) == 0
 	if first {
 		fmt.Fprintln(p.out, i18n.T("Connect laneway to a Jira site, or type demo to try it on a generated board first. ctrl+d cancels."))