diff --git a/core/cmd/dms/commands_config.go b/core/cmd/dms/commands_config.go
index 37568a40e..094cf3da2 100644
--- a/core/cmd/dms/commands_config.go
+++ b/core/cmd/dms/commands_config.go
@@ -55,32 +55,8 @@ var resolveIncludeCmd = &cobra.Command{
 	Run: runResolveInclude,
 }
 
-var mangoMigrateMain bool
-
-var mangoMigrateCmd = &cobra.Command{
-	Use:   "mango-migrate",
-	Short: "Respell Mango config keys for the installed Mango",
-	Long:  "Detects whether the installed Mango uses legacy or snake_case config keys, rewrites the DMS fragments in mango/dms to match, and prints the dialect on the last line. --main also rewrites config.conf after a backup.",
-	Args:  cobra.NoArgs,
-	Run: func(cmd *cobra.Command, args []string) {
-		dialect := mangoconf.Detect()
-		changed, err := dialect.Migrate(mangoconf.Dir(), mangoMigrateMain)
-		for _, path := range changed {
-			fmt.Fprintf(os.Stderr, "migrated %s\n", path)
-		}
-		// Printed before any error: the shell needs the dialect even when a fragment failed.
-		fmt.Println(dialect)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
-			os.Exit(1)
-		}
-	},
-}
-
 func init() {
 	configCmd.AddCommand(resolveIncludeCmd)
-	mangoMigrateCmd.Flags().BoolVar(&mangoMigrateMain, "main", false, "also rewrite config.conf (a backup is kept)")
-	configCmd.AddCommand(mangoMigrateCmd)
 }
 
 type IncludeResult struct {
diff --git a/core/cmd/dms/commands_doctor.go b/core/cmd/dms/commands_doctor.go
index 1d207d7cc..99be2e6d4 100644
--- a/core/cmd/dms/commands_doctor.go
+++ b/core/cmd/dms/commands_doctor.go
@@ -858,6 +858,14 @@ func checkWindowManagers() []checkResult {
 		if c.name == "Hyprland" {
 			results = append(results, checkHyprlandConfigFormat(filepath.Join(utils.XDGConfigHome(), "hypr"))...)
 		}
+		if c.name == "mangowc" && mangoLacksSnakeCase(ver) {
+			results = append(results, checkResult{
+				catCompositor, "Mango config format", statusError,
+				fmt.Sprintf("Mango %s is older than 0.18", ver),
+				"DMS writes Mango config with the snake_case keys of Mango 0.18 and later, which this release rejects; upgrade Mango",
+				doctorDocsURL + "#compositor-checks",
+			})
+		}
 	}
 
 	if !foundAny {
@@ -878,7 +886,7 @@ func checkWindowManagers() []checkResult {
 	}
 
 	if os.Getenv("MANGO_INSTANCE_SIGNATURE") != "" {
-		results = append(results, checkMangoConfig(mangoconf.Dir(), mangoconf.Detect())...)
+		results = append(results, checkMangoConfig(mangoconf.Dir())...)
 	}
 
 	results = append(results, checkCompositorBlurSupport())
@@ -886,33 +894,70 @@ func checkWindowManagers() []checkResult {
 	return results
 }
 
-var mangoLegacyOverviewBinds = regexp.MustCompile(`(?im)^\s*mousebind\s*=\s*none\s*,\s*(btn_left\s*,\s*toggleoverview\s*,\s*1|btn_right\s*,\s*killclient\s*,\s*0)\s*$`)
+var (
+	mangoLegacyOverviewBinds = regexp.MustCompile(`(?im)^\s*mousebind\s*=\s*none\s*,\s*(btn_left\s*,\s*toggleoverview\s*,\s*1|btn_right\s*,\s*killclient\s*,\s*0)\s*$`)
+	mangoUnknownKeyword      = regexp.MustCompile(`Unknown keyword:\s*(\S+)`)
+	ansiEscape               = regexp.MustCompile(`\x1b\[[0-9;]*m`)
+)
 
-func checkMangoConfig(mangoDir string, dialect mangoconf.Dialect) []checkResult {
+// Mango's parser follows source= and always exits 0; only its output tells.
+var mangoParseConfig = func(path string) (string, error) {
+	if _, err := exec.LookPath("mango"); err != nil {
+		return "", err
+	}
+	out, _ := exec.Command("mango", "-p", "-c", path).CombinedOutput()
+	return string(out), nil
+}
+
+// Each "Unknown keyword" line is followed by a location line naming the file.
+func mangoUnknownKeywords(output string) []string {
+	var found []string
+	seen := map[string]bool{}
+	key := ""
+	for line := range strings.SplitSeq(ansiEscape.ReplaceAllString(output, ""), "\n") {
+		if m := mangoUnknownKeyword.FindStringSubmatch(line); m != nil {
+			key = m[1]
+			continue
+		}
+		slash := strings.LastIndex(line, "/")
+		if key == "" || slash < 0 {
+			continue
+		}
+		file, _, _ := strings.Cut(line[slash+1:], ":")
+		entry := key + " (" + file + ")"
+		if !seen[entry] {
+			seen[entry] = true
+			found = append(found, entry)
+		}
+		key = ""
+	}
+	return found
+}
+
+func checkMangoConfig(mangoDir string) []checkResult {
 	url := doctorDocsURL + "#compositor-checks"
-	paths, _ := filepath.Glob(filepath.Join(mangoDir, "dms", "*.conf"))
-	paths = append([]string{filepath.Join(mangoDir, "config.conf")}, paths...)
+	mainPath := filepath.Join(mangoDir, "config.conf")
+	var results []checkResult
+	if output, err := mangoParseConfig(mainPath); err == nil {
+		if unknown := mangoUnknownKeywords(output); len(unknown) > 0 {
+			results = append(results, checkResult{catCompositor, "Mango config keys", statusError,
+				"Unknown keys: " + strings.Join(unknown, ", "),
+				"Mango 0.18 renamed its config keys to snake_case. Run migrate-config-keys.sh from Mango's 0.18.0 release over ~/.config/mango, or rename the keys by hand.", url})
+		}
+	}
 
-	var stale, overviewBinds []string
+	paths, _ := filepath.Glob(filepath.Join(mangoDir, "dms", "*.conf"))
+	paths = append([]string{mainPath}, paths...)
+	var overviewBinds []string
 	for _, path := range paths {
 		data, err := os.ReadFile(path)
 		if err != nil {
 			continue
 		}
-		if dialect.Translate(string(data)) != string(data) {
-			stale = append(stale, filepath.Base(path))
-		}
 		if mangoLegacyOverviewBinds.Match(data) {
 			overviewBinds = append(overviewBinds, filepath.Base(path))
 		}
 	}
-
-	var results []checkResult
-	if len(stale) > 0 {
-		results = append(results, checkResult{catCompositor, "Mango config keys", statusError,
-			fmt.Sprintf("Not %s keys: %s", dialect, strings.Join(stale, ", ")),
-			"This Mango rejects those lines as unknown keywords. Run `dms config mango-migrate --main` (config.conf is backed up).", url})
-	}
 	if len(overviewBinds) > 0 {
 		results = append(results, checkResult{catCompositor, "Mango mouse binds", statusWarn,
 			"Obsolete overview binds in " + strings.Join(overviewBinds, ", "),
@@ -967,6 +1012,10 @@ func hyprlandLacksLua(ver string) bool {
 	return ver != "" && version.CompareVersions(ver, "0.55.0") < 0
 }
 
+func mangoLacksSnakeCase(ver string) bool {
+	return ver != "" && version.CompareVersions(ver, "0.18.0") < 0
+}
+
 func firstSubmatch(re *regexp.Regexp) func(string) string {
 	return func(s string) string {
 		if m := re.FindStringSubmatch(s); len(m) > 1 {
diff --git a/core/cmd/dms/commands_doctor_test.go b/core/cmd/dms/commands_doctor_test.go
index e419165e5..dfeb4d7ba 100644
--- a/core/cmd/dms/commands_doctor_test.go
+++ b/core/cmd/dms/commands_doctor_test.go
@@ -8,8 +8,6 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
-
-	"github.com/duxlabs-dev/dux-shell/core/internal/mangoconf"
 )
 
 func TestQuickshellVersionFailureDetails(t *testing.T) {
@@ -385,19 +383,41 @@ func TestCheckXDGMenuFile(t *testing.T) {
 	}
 }
 
-func TestCheckMangoConfigFlagsWrongDialectAndOverviewBinds(t *testing.T) {
+func TestCheckMangoConfigReportsUnknownKeysAndOverviewBinds(t *testing.T) {
 	dir := t.TempDir()
 	if err := os.MkdirAll(filepath.Join(dir, "dms"), 0o755); err != nil {
 		t.Fatal(err)
 	}
 	_ = os.WriteFile(filepath.Join(dir, "config.conf"), []byte("exec-once=dms run\nmousebind=NONE,btn_left,toggleoverview,1\n"), 0o644)
-	_ = os.WriteFile(filepath.Join(dir, "dms", "layout.conf"), []byte("border_px=2\n"), 0o644)
+	// Shape of `mango -p` 0.18.2 output, colours included; the same key twice collapses.
+	parsed := "\x1b[1m\x1b[31m[ERROR]:\x1b[0m Unknown keyword: \x1b[1m\x1b[31mexec-once\x1b[0m\n" +
+		"\x1b[1;31m╰─\x1b[1;33m[Index]\x1b[0m \x1b[1;36m" + dir + "/config.conf\x1b[0m:\x1b[1;35m1\x1b[0m\n   ╰─exec-once=dms run\n\n" +
+		"[ERROR]: Unknown keyword: overviewgappo\n╰─[Index] " + dir + "/dms/layout.conf:10\n   ╰─overviewgappo=30\n" +
+		"[ERROR]: Unknown keyword: overviewgappo\n╰─[Index] " + dir + "/dms/layout.conf:12\n"
+	prev := mangoParseConfig
+	mangoParseConfig = func(string) (string, error) { return parsed, nil }
+	t.Cleanup(func() { mangoParseConfig = prev })
 
-	if got := checkMangoConfig(dir, mangoconf.Legacy); len(got) != 2 || got[0].message != "Not legacy keys: layout.conf" {
-		t.Fatalf("legacy: %+v", got)
+	got := checkMangoConfig(dir)
+	if len(got) != 2 || got[0].message != "Unknown keys: exec-once (config.conf), overviewgappo (layout.conf)" || got[1].name != "Mango mouse binds" {
+		t.Fatalf("got %+v", got)
 	}
-	if got := checkMangoConfig(dir, mangoconf.Snake); len(got) != 2 || got[0].message != "Not snake keys: config.conf" {
-		t.Fatalf("snake: %+v", got)
+	mangoParseConfig = func(string) (string, error) { return "", os.ErrNotExist }
+	if got := checkMangoConfig(dir); len(got) != 1 {
+		t.Fatalf("without mango on PATH only the bind check should run, got %+v", got)
+	}
+}
+
+func TestMangoLacksSnakeCase(t *testing.T) {
+	for ver, want := range map[string]bool{
+		"0.17.5": true,
+		"0.18.0": false,
+		"0.18.2": false,
+		"":       false,
+	} {
+		if got := mangoLacksSnakeCase(ver); got != want {
+			t.Errorf("mangoLacksSnakeCase(%q) = %v, want %v", ver, got, want)
+		}
 	}
 }
 
diff --git a/core/cmd/dms/commands_setup.go b/core/cmd/dms/commands_setup.go
index 226dc2e97..5deb59519 100644
--- a/core/cmd/dms/commands_setup.go
+++ b/core/cmd/dms/commands_setup.go
@@ -130,7 +130,7 @@ var dmsConfigSpecs = map[string]dmsConfigSpec{
 		mangoFile:    "layout.conf",
 		niriContent:  func(_ string) string { return config.NiriLayoutConfig },
 		hyprContent:  func(_ string) string { return config.DMSLayoutLuaConfig },
-		mangoContent: func(_ string) string { return mangoconf.Detect().Translate(config.MangoLayoutConfig) },
+		mangoContent: func(_ string) string { return config.MangoLayoutConfig },
 	},
 	"colors": {
 		niriFile:     "colors.kdl",
@@ -138,7 +138,7 @@ var dmsConfigSpecs = map[string]dmsConfigSpec{
 		mangoFile:    "colors.conf",
 		niriContent:  func(_ string) string { return config.NiriColorsConfig },
 		hyprContent:  func(_ string) string { return config.DMSColorsLuaConfig },
-		mangoContent: func(_ string) string { return mangoconf.Detect().Translate(config.MangoColorsConfig) },
+		mangoContent: func(_ string) string { return config.MangoColorsConfig },
 	},
 	"alttab": {
 		niriFile:    "alttab.kdl",
diff --git a/core/internal/config/embedded/mango-colors.conf b/core/internal/config/embedded/mango-colors.conf
index 009aea48e..d1f199c7b 100644
--- a/core/internal/config/embedded/mango-colors.conf
+++ b/core/internal/config/embedded/mango-colors.conf
@@ -1,6 +1,6 @@
 # Auto-generated by DMS. Overwritten by matugen (dms/colors.conf).
 # Remove `source=./dms/colors.conf` from config.conf to override manually.
 
-bordercolor = 0x595959ff
-focuscolor  = 0x8ab4f8ff
-urgentcolor = 0xff5555ff
+border_color = 0x595959ff
+focus_color  = 0x8ab4f8ff
+urgent_color = 0xff5555ff
diff --git a/core/internal/config/embedded/mango-layout.conf b/core/internal/config/embedded/mango-layout.conf
index 9631c40c5..da64c5250 100644
--- a/core/internal/config/embedded/mango-layout.conf
+++ b/core/internal/config/embedded/mango-layout.conf
@@ -1,8 +1,8 @@
 # Auto-generated by DMS. Regenerated from DMS settings (dms/layout.conf).
 
 border_radius=12
-gappih=5
-gappiv=5
-gappoh=5
-gappov=5
-borderpx=2
+gap_inner_horizontal=5
+gap_inner_vertical=5
+gap_outer_horizontal=5
+gap_outer_vertical=5
+border_px=2
diff --git a/core/internal/config/embedded/mango.conf b/core/internal/config/embedded/mango.conf
index 472b686e0..4a3c6b8c8 100644
--- a/core/internal/config/embedded/mango.conf
+++ b/core/internal/config/embedded/mango.conf
@@ -7,7 +7,7 @@ env=XDG_SESSION_TYPE,wayland
 
 # Starts the shell when DMS is not a systemd service. Never exec=: Mango re-runs
 # exec= on every config reload, and DMS reloads the config.
-exec-once=dms run
+exec_once=dms run
 
 source=./dms/colors.conf
 source=./dms/layout.conf
diff --git a/core/internal/config/mango_deploy.go b/core/internal/config/mango_deploy.go
index 92429369f..f7c99f99c 100644
--- a/core/internal/config/mango_deploy.go
+++ b/core/internal/config/mango_deploy.go
@@ -41,14 +41,13 @@ func nonEmptyFile(path string) (string, bool) {
 }
 
 var (
-	mangoBindLine    = regexp.MustCompile(`^\s*(bind[a-z]*|mousebind|axisbind|gesturebind|switchbind|keymode|key_mode)\s*=`)
-	mangoMonitorLine = regexp.MustCompile(`^\s*(monitorrule|monitor_rule)\s*=`)
-	mangoWindowLine  = regexp.MustCompile(`^\s*(windowrule|window_rule|windowrule-once|window_rule_once)\s*=`)
-	mangoExecOnceDMS = regexp.MustCompile(`(?m)^# Starts the shell when DMS.*\n#.*\n(exec-once|exec_once)=dms run\n`)
+	mangoBindLine    = regexp.MustCompile(`^\s*(bind[a-z]*|mousebind|axisbind|gesturebind|switchbind|key_mode)\s*=`)
+	mangoMonitorLine = regexp.MustCompile(`^\s*monitor_rule\s*=`)
+	mangoWindowLine  = regexp.MustCompile(`^\s*window_rule(_once)?\s*=`)
+	mangoExecOnceDMS = regexp.MustCompile(`(?m)^# Starts the shell when DMS.*\n#.*\nexec_once=dms run\n`)
 )
 
 var (
-	mangoDialect                = mangoconf.Detect
 	mangoSessionTargetInstalled = mangoconf.SessionTargetInstalled
 )
 
@@ -110,17 +109,16 @@ func (cd *ConfigDeployer) deployMangoConfig(terminalCommand string, useSystemd b
 		cd.log(fmt.Sprintf("Backed up existing config to %s", result.BackupPath))
 	}
 
-	dialect := mangoDialect()
 	newConfig := strings.ReplaceAll(MangoConfig, "{{TERMINAL_COMMAND}}", terminalCommand)
 	if cd.systemdAutostart(deps.WindowManagerMango, useSystemd) {
 		newConfig = mangoExecOnceDMS.ReplaceAllString(newConfig, "")
 	}
-	if err := os.WriteFile(result.Path, []byte(dialect.Translate(newConfig)), 0o644); err != nil {
+	if err := os.WriteFile(result.Path, []byte(newConfig), 0o644); err != nil {
 		result.Error = fmt.Errorf("failed to write config: %w", err)
 		return result, result.Error
 	}
 
-	if err := cd.deployMangoDmsConfigs(dmsDir, terminalCommand, dialect, existing, timestamp); err != nil {
+	if err := cd.deployMangoDmsConfigs(dmsDir, terminalCommand, existing, timestamp); err != nil {
 		result.Error = fmt.Errorf("failed to deploy dms configs: %w", err)
 		return result, result.Error
 	}
@@ -132,7 +130,7 @@ func (cd *ConfigDeployer) deployMangoConfig(terminalCommand string, useSystemd b
 
 // Like niri, fragments the user or the shell already filled are left alone; the
 // replaced config.conf hands its binds, monitor and window rules to empty ones.
-func (cd *ConfigDeployer) deployMangoDmsConfigs(dmsDir, terminalCommand string, dialect mangoconf.Dialect, oldMain, timestamp string) error {
+func (cd *ConfigDeployer) deployMangoDmsConfigs(dmsDir, terminalCommand, oldMain, timestamp string) error {
 	stockBinds := strings.ReplaceAll(MangoBindsConfig, "{{TERMINAL_COMMAND}}", terminalCommand)
 	bindsPath := filepath.Join(dmsDir, "binds.conf")
 	if data, err := os.ReadFile(bindsPath); err == nil && len(data) > 0 {
@@ -142,7 +140,7 @@ func (cd *ConfigDeployer) deployMangoDmsConfigs(dmsDir, terminalCommand string,
 		}
 		cd.log(fmt.Sprintf("Backed up existing binds to %s", backup))
 		if cd.replaceBinds {
-			if err := os.WriteFile(bindsPath, []byte(dialect.Translate(stockBinds)), 0o644); err != nil {
+			if err := os.WriteFile(bindsPath, []byte(stockBinds), 0o644); err != nil {
 				return fmt.Errorf("failed to write binds.conf: %w", err)
 			}
 			cd.log("Deployed DMS stock binds.conf")
@@ -160,7 +158,7 @@ func (cd *ConfigDeployer) deployMangoDmsConfigs(dmsDir, terminalCommand string,
 			binds = mangoconf.BindsMovedHeader + "\n" + old
 			cd.log("Moved existing binds from config.conf to binds.conf")
 		}
-		if err := os.WriteFile(bindsPath, []byte(dialect.Translate(binds)), 0o644); err != nil {
+		if err := os.WriteFile(bindsPath, []byte(binds), 0o644); err != nil {
 			return fmt.Errorf("failed to write binds.conf: %w", err)
 		}
 	}
@@ -182,7 +180,7 @@ func (cd *ConfigDeployer) deployMangoDmsConfigs(dmsDir, terminalCommand string,
 			cd.log(fmt.Sprintf("Skipping %s (already exists)", cfg.name))
 			continue
 		}
-		if err := os.WriteFile(path, []byte(dialect.Translate(cfg.content)), 0o644); err != nil {
+		if err := os.WriteFile(path, []byte(cfg.content), 0o644); err != nil {
 			return fmt.Errorf("failed to write %s: %w", cfg.name, err)
 		}
 		cd.log(fmt.Sprintf("Deployed %s", cfg.name))
diff --git a/core/internal/config/mango_deploy_test.go b/core/internal/config/mango_deploy_test.go
index 9b08c22e8..64b2cd4bc 100644
--- a/core/internal/config/mango_deploy_test.go
+++ b/core/internal/config/mango_deploy_test.go
@@ -13,12 +13,11 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func stubMango(t *testing.T, dialect mangoconf.Dialect, target bool, addWants error) *int {
+func stubMango(t *testing.T, target bool, addWants error) *int {
 	t.Helper()
-	prevDialect, prevTarget := mangoDialect, mangoSessionTargetInstalled
-	mangoDialect = func() mangoconf.Dialect { return dialect }
+	prevTarget := mangoSessionTargetInstalled
 	mangoSessionTargetInstalled = func() bool { return target }
-	t.Cleanup(func() { mangoDialect, mangoSessionTargetInstalled = prevDialect, prevTarget })
+	t.Cleanup(func() { mangoSessionTargetInstalled = prevTarget })
 	return stubAddWants(t, addWants)
 }
 
@@ -31,16 +30,16 @@ func readMango(t *testing.T, home, rel string) string {
 
 const oldMangoConfig = `exec-once=waybar
 bind=SUPER,Return,spawn,foot
-keymode=resize
+key_mode=resize
 bind=NONE,h,resizewin,-10,0
-monitorrule=name:^DP-1$,width:2560,height:1440,refresh:144,x:0,y:0,scale:1,rr:0,vrr:1,hdr:1
-windowrule=appid:pavucontrol,isfloating:1
+monitor_rule=name:^DP-1$,width:2560,height:1440,refresh:144,x:0,y:0,scale:1,rr:0,vrr:1,hdr:1
+window_rule=app_id:pavucontrol,is_floating:1
 `
 
 func TestMangoDeployMovesUserRulesAndKeepsBindsByDefault(t *testing.T) {
 	home := t.TempDir()
 	t.Setenv("HOME", home)
-	stubMango(t, mangoconf.Legacy, false, nil)
+	stubMango(t, false, nil)
 	require.NoError(t, os.MkdirAll(filepath.Join(home, ".config", "mango"), 0o755))
 	require.NoError(t, os.WriteFile(filepath.Join(home, ".config", "mango", "config.conf"), []byte(oldMangoConfig), 0o644))
 
@@ -48,25 +47,26 @@ func TestMangoDeployMovesUserRulesAndKeepsBindsByDefault(t *testing.T) {
 	require.NoError(t, err)
 	assert.NotEmpty(t, result.BackupPath)
 
-	assert.Contains(t, readMango(t, home, "config.conf"), "exec-once=dms run")
+	assert.Contains(t, readMango(t, home, "config.conf"), "exec_once=dms run")
 	assert.Contains(t, readMango(t, home, "config.conf"), "source=./dms/input.conf")
 	assert.Equal(t, "", readMango(t, home, "dms/input.conf"))
 	binds := readMango(t, home, "dms/binds.conf")
-	assert.Contains(t, binds, "bind=SUPER,Return,spawn,foot\nkeymode=resize\nbind=NONE,h,resizewin,-10,0")
+	assert.Contains(t, binds, "bind=SUPER,Return,spawn,foot\nkey_mode=resize\nbind=NONE,h,resizewin,-10,0")
 	assert.NotContains(t, binds, "{{TERMINAL_COMMAND}}")
+	assert.Contains(t, readMango(t, home, "dms/outputs.conf"), "monitor_rule=name:^DP-1$")
 	assert.Contains(t, readMango(t, home, "dms/outputs.conf"), "hdr:1")
-	assert.Contains(t, readMango(t, home, "dms/windowrules.conf"), "windowrule=appid:pavucontrol,isfloating:1")
+	assert.Contains(t, readMango(t, home, "dms/windowrules.conf"), "window_rule=app_id:pavucontrol,is_floating:1")
 }
 
 func TestMangoDeployBindsChoiceAlwaysBacksUp(t *testing.T) {
 	for _, replace := range []bool{false, true} {
 		home := t.TempDir()
 		t.Setenv("HOME", home)
-		stubMango(t, mangoconf.Legacy, false, nil)
+		stubMango(t, false, nil)
 		dms := filepath.Join(home, ".config", "mango", "dms")
 		require.NoError(t, os.MkdirAll(dms, 0o755))
-		require.NoError(t, os.WriteFile(filepath.Join(dms, "binds.conf"), []byte("bind=SUPER,x,killclient\n"), 0o644))
-		require.NoError(t, os.WriteFile(filepath.Join(dms, "windowrules.conf"), []byte("windowrule=appid:keep,isglobal:1\n"), 0o644))
+		require.NoError(t, os.WriteFile(filepath.Join(dms, "binds.conf"), []byte("bind=SUPER,x,killclient\nkey_mode=resize\n"), 0o644))
+		require.NoError(t, os.WriteFile(filepath.Join(dms, "windowrules.conf"), []byte("window_rule=app_id:keep,is_global:1\n"), 0o644))
 
 		cd := NewConfigDeployer(nil)
 		cd.SetReplaceBinds(replace)
@@ -76,8 +76,8 @@ func TestMangoDeployBindsChoiceAlwaysBacksUp(t *testing.T) {
 		backups, _ := filepath.Glob(filepath.Join(dms, "binds.conf.backup.*"))
 		assert.Len(t, backups, 1, "replace=%v", replace)
 		binds := readMango(t, home, "dms/binds.conf")
-		assert.Equal(t, !replace, binds == mangoconf.BindsKeptHeader+"\nbind=SUPER,x,killclient\n", "replace=%v", replace)
-		assert.Equal(t, "windowrule=appid:keep,isglobal:1\n", readMango(t, home, "dms/windowrules.conf"))
+		assert.Equal(t, !replace, binds == mangoconf.BindsKeptHeader+"\nbind=SUPER,x,killclient\nkey_mode=resize\n", "replace=%v", replace)
+		assert.Equal(t, "window_rule=app_id:keep,is_global:1\n", readMango(t, home, "dms/windowrules.conf"), "kept fragments are left alone")
 	}
 }
 
@@ -97,7 +97,7 @@ func TestMangoDeploySystemdAutostart(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			home := t.TempDir()
 			t.Setenv("HOME", home)
-			calls := stubMango(t, mangoconf.Snake, tc.target, tc.addWants)
+			calls := stubMango(t, tc.target, tc.addWants)
 			_, err := NewConfigDeployer(nil).DeployCompositor(deps.WindowManagerMango, "kitty", true)
 			require.NoError(t, err)
 			main := readMango(t, home, "config.conf")
diff --git a/core/internal/config/session_units_test.go b/core/internal/config/session_units_test.go
index cde61d312..320a1736a 100644
--- a/core/internal/config/session_units_test.go
+++ b/core/internal/config/session_units_test.go
@@ -43,7 +43,7 @@ func TestDisableSessionRemovesEveryWantsLink(t *testing.T) {
 
 func TestEnableSessionMangoWithoutTarget(t *testing.T) {
 	t.Setenv("HOME", t.TempDir())
-	calls := stubMango(t, mangoconf.Snake, false, nil)
+	calls := stubMango(t, false, nil)
 	unit, err := EnableSession(deps.WindowManagerMango)
 	require.Error(t, err)
 	assert.Empty(t, unit)
diff --git a/core/internal/mangoconf/check.go b/core/internal/mangoconf/check.go
new file mode 100644
index 000000000..448135f9c
--- /dev/null
+++ b/core/internal/mangoconf/check.go
@@ -0,0 +1,19 @@
+// Package mangoconf holds what DMS knows about Mango's config files: where they
+// live, the session target, and the markers DMS leaves in the binds fragment.
+package mangoconf
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Mango reads each line into a 512-byte buffer and the value into 255 bytes; longer is cut silently.
+const maxValueLen = 255
+
+func CheckLine(line string) error {
+	_, value, ok := strings.Cut(line, "=")
+	if !ok || len(strings.TrimSpace(value)) <= maxValueLen {
+		return nil
+	}
+	return fmt.Errorf("line is %d characters after '='; Mango truncates past %d", len(strings.TrimSpace(value)), maxValueLen)
+}
diff --git a/core/internal/mangoconf/dialect.go b/core/internal/mangoconf/dialect.go
deleted file mode 100644
index e2aa2c795..000000000
--- a/core/internal/mangoconf/dialect.go
+++ /dev/null
@@ -1,216 +0,0 @@
-// Package mangoconf maps Mango config keys between the run-together names of
-// Mango <= 0.17.5 and the snake_case names of upstream 8adc6bc3 (mangowm/mango#1491).
-// Neither parser accepts the other's names.
-package mangoconf
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"os/exec"
-	"regexp"
-	"strings"
-	"sync"
-)
-
-type Dialect int
-
-const (
-	Legacy Dialect = iota
-	Snake
-)
-
-// Upstream migration order: where two legacy names share a snake name, the
-// window-rule spelling comes first and wins the reverse lookup.
-var renames = [][2]string{
-	{"windowrule-once", "window_rule_once"},
-	{"windowrule", "window_rule"},
-	{"monitorrule", "monitor_rule"},
-	{"tagrule", "tag_rule"},
-	{"layerrule", "layer_rule"},
-	{"devicerule", "device_rule"},
-	{"source-optional", "source_optional"},
-	{"exec-once", "exec_once"},
-	{"keymode", "key_mode"},
-	{"isnoborder", "no_border"},
-	{"isnoshadow", "no_shadow"},
-	{"isnoradius", "no_radius"},
-	{"isnoanimation", "no_animation"},
-	{"isnosizehint", "no_size_hint"},
-	{"noblur", "no_blur"},
-	{"noshadow", "no_shadow"},
-	{"noanim", "no_animation"},
-	{"nofocus", "no_focus"},
-	{"nofadein", "no_fade_in"},
-	{"nofadeout", "no_fade_out"},
-	{"noswallow", "no_swallow"},
-	{"special_gappih", "special_gap_inner_horizontal"},
-	{"special_gappiv", "special_gap_inner_vertical"},
-	{"special_gappoh", "special_gap_outer_horizontal"},
-	{"special_gappov", "special_gap_outer_vertical"},
-	{"gappih", "gap_inner_horizontal"},
-	{"gappiv", "gap_inner_vertical"},
-	{"gappoh", "gap_outer_horizontal"},
-	{"gappov", "gap_outer_vertical"},
-	{"overviewgappi", "overview_gap_inner"},
-	{"overviewgappo", "overview_gap_outer"},
-	{"default_mfact", "default_master_factor"},
-	{"default_nmaster", "default_master_count"},
-	{"animation_curve_opafadein", "animation_curve_opacity_fade_in"},
-	{"animation_curve_opafadeout", "animation_curve_opacity_fade_out"},
-	{"dwindle_hsplit", "dwindle_horizontal_split"},
-	{"dwindle_vsplit", "dwindle_vertical_split"},
-	{"fadein_begin_opacity", "fade_in_begin_opacity"},
-	{"fadeout_begin_opacity", "fade_out_begin_opacity"},
-	{"focusdir_only_zone_overlap", "focus_direction_only_zone_overlap"},
-	{"force_fakemaximize", "force_fake_maximize"},
-	{"idleinhibit_ignore_visible", "idle_inhibit_ignore_visible"},
-	{"idleinhibit_when_focus", "idle_inhibit_when_focus"},
-	{"idleinhibit_when_fullscreen", "idle_inhibit_when_fullscreen"},
-	{"syncobj_enable", "sync_obj_enable"},
-	{"isfakefullscreen", "is_fake_fullscreen"},
-	{"isfloating", "is_floating"},
-	{"isfullscreen", "is_fullscreen"},
-	{"isunglobal", "is_unmanaged_global"},
-	{"isglobal", "is_global"},
-	{"isnamedscratchpad", "is_named_scratchpad"},
-	{"isopensilent", "is_open_silent"},
-	{"isoverlay", "is_overlay"},
-	{"istagsilent", "is_tag_silent"},
-	{"isterm", "is_term"},
-	{"appid", "app_id"},
-	{"bordercolor", "border_color"},
-	{"borderpx", "border_px"},
-	{"dropcolor", "drop_color"},
-	{"focuscolor", "focus_color"},
-	{"globalcolor", "global_color"},
-	{"globalkeybinding", "global_key_binding"},
-	{"maximizescreencolor", "maximized_screen_color"},
-	{"mfact", "master_factor"},
-	{"nmaster", "master_count"},
-	{"numlockon", "numlock_on"},
-	{"offsetx", "offset_x"},
-	{"offsety", "offset_y"},
-	{"overlaycolor", "overlay_color"},
-	{"rootcolor", "root_color"},
-	{"scratchpadcolor", "scratchpad_color"},
-	{"shadowscolor", "shadows_color"},
-	{"sloppyfocus", "sloppy_focus"},
-	{"smartgaps", "smart_gaps"},
-	{"splitcolor", "split_color"},
-	{"urgentcolor", "urgent_color"},
-	{"warpcursor", "warp_cursor"},
-}
-
-var toSnake, toLegacy = func() (map[string]string, map[string]string) {
-	fwd := make(map[string]string, len(renames))
-	rev := make(map[string]string, len(renames))
-	for _, r := range renames {
-		fwd[r[0]] = r[1]
-		if _, ok := rev[r[1]]; !ok {
-			rev[r[1]] = r[0]
-		}
-	}
-	return fwd, rev
-}()
-
-// Normalize returns the snake_case name for a key in either dialect.
-func Normalize(key string) string {
-	if s, ok := toSnake[key]; ok {
-		return s
-	}
-	return key
-}
-
-// Key spells a snake_case key in this dialect.
-func (d Dialect) Key(snake string) string {
-	if d == Snake {
-		return snake
-	}
-	if l, ok := toLegacy[snake]; ok {
-		return l
-	}
-	return snake
-}
-
-var keyLine = regexp.MustCompile(`^(\s*)([A-Za-z][A-Za-z_-]*)(\s*=\s*)(.*)$`)
-
-// Translate respells every line key, and the field keys of rule lines, in this dialect.
-func (d Dialect) Translate(text string) string {
-	lines := strings.Split(text, "\n")
-	for i, line := range lines {
-		m := keyLine.FindStringSubmatch(line)
-		if m == nil {
-			continue
-		}
-		key := Normalize(m[2])
-		value := m[4]
-		switch key {
-		case "window_rule", "window_rule_once", "tag_rule":
-			value = d.translateFields(value, nil)
-		case "layer_rule":
-			value = d.translateFields(value, legacyLayerFields)
-		}
-		lines[i] = m[1] + d.Key(key) + m[3] + value
-	}
-	return strings.Join(lines, "\n")
-}
-
-// Layer rules spell these without the window rules' "is" prefix.
-var legacyLayerFields = map[string]string{"no_shadow": "noshadow", "no_animation": "noanim"}
-
-func (d Dialect) translateFields(value string, legacyOverride map[string]string) string {
-	parts := strings.Split(value, ",")
-	for i, part := range parts {
-		k, v, ok := strings.Cut(part, ":")
-		if !ok {
-			continue
-		}
-		trimmed := strings.TrimSpace(k)
-		key := d.Key(Normalize(trimmed))
-		if l, ok := legacyOverride[Normalize(trimmed)]; ok && d == Legacy {
-			key = l
-		}
-		parts[i] = strings.Replace(k, trimmed, key, 1) + ":" + v
-	}
-	return strings.Join(parts, ",")
-}
-
-// Legacy builds carry exec_once as a symbol name, so it cannot tell the dialects apart.
-var snakeMarker = []byte("gap_inner_horizontal")
-
-var (
-	detectOnce sync.Once
-	detected   Dialect
-)
-
-// Detect reads the mango binary: snake_case shipped on master builds still reporting 0.17.5, before the 0.18.0 release.
-func Detect() Dialect {
-	detectOnce.Do(func() {
-		path, err := exec.LookPath("mango")
-		if err != nil {
-			return
-		}
-		detected = DetectBinary(path)
-	})
-	return detected
-}
-
-func DetectBinary(path string) Dialect {
-	data, err := os.ReadFile(path)
-	if err != nil || !bytes.Contains(data, snakeMarker) {
-		return Legacy
-	}
-	return Snake
-}
-
-// Mango reads each line into a 512-byte buffer and the value into 255 bytes; longer is cut silently.
-const maxValueLen = 255
-
-func CheckLine(line string) error {
-	_, value, ok := strings.Cut(line, "=")
-	if !ok || len(strings.TrimSpace(value)) <= maxValueLen {
-		return nil
-	}
-	return fmt.Errorf("line is %d characters after '='; Mango truncates past %d", len(strings.TrimSpace(value)), maxValueLen)
-}
diff --git a/core/internal/mangoconf/dialect_test.go b/core/internal/mangoconf/dialect_test.go
deleted file mode 100644
index ec5758452..000000000
--- a/core/internal/mangoconf/dialect_test.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package mangoconf
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestTranslateRespellsKeysBothWays(t *testing.T) {
-	legacy := "exec-once=dms run\nsource=./dms/colors.conf\ngappih = 5\nbordercolor = 0x595959ff\nwindowrule=appid:foo,isfloating:1,isnoanimation:1\nlayerrule=noanim:1,noshadow:1,layer_name:rofi\n# exec-once=kept\n"
-	snake := "exec_once=dms run\nsource=./dms/colors.conf\ngap_inner_horizontal = 5\nborder_color = 0x595959ff\nwindow_rule=app_id:foo,is_floating:1,no_animation:1\nlayer_rule=no_animation:1,no_shadow:1,layer_name:rofi\n# exec-once=kept\n"
-	assert.Equal(t, snake, Snake.Translate(legacy))
-	assert.Equal(t, legacy, Legacy.Translate(snake))
-	assert.Equal(t, legacy, Legacy.Translate(legacy))
-	assert.Equal(t, "tag_rule=id:1,master_factor:0.6,master_count:2\n", Snake.Translate("tagrule=id:1,mfact:0.6,nmaster:2\n"))
-}
-
-func TestDetectBinary(t *testing.T) {
-	dir := t.TempDir()
-	old := filepath.Join(dir, "old")
-	cur := filepath.Join(dir, "new")
-	require.NoError(t, os.WriteFile(old, []byte("\x00run_exec_once\x00gappih\x00"), 0o755))
-	require.NoError(t, os.WriteFile(cur, []byte("\x00exec_once\x00gap_inner_horizontal\x00"), 0o755))
-	assert.Equal(t, Legacy, DetectBinary(old))
-	assert.Equal(t, Snake, DetectBinary(cur))
-	assert.Equal(t, Legacy, DetectBinary(filepath.Join(dir, "missing")))
-}
-
-func TestMigrateLeavesUserConfigUnlessAsked(t *testing.T) {
-	dir := t.TempDir()
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "dms"), 0o755))
-	main := filepath.Join(dir, "config.conf")
-	layout := filepath.Join(dir, "dms", "layout.conf")
-	input := filepath.Join(dir, "dms", "input.conf")
-	require.NoError(t, os.WriteFile(main, []byte("exec-once=dms run\n"), 0o644))
-	require.NoError(t, os.WriteFile(layout, []byte("borderpx=2\n"), 0o644))
-	require.NoError(t, os.WriteFile(input, []byte("numlockon=1\n"), 0o644))
-
-	changed, err := Snake.Migrate(dir, false)
-	require.NoError(t, err)
-	assert.Equal(t, []string{layout, input}, changed)
-	data, _ := os.ReadFile(main)
-	assert.Equal(t, "exec-once=dms run\n", string(data))
-	data, _ = os.ReadFile(input)
-	assert.Equal(t, "numlock_on=1\n", string(data))
-
-	changed, err = Snake.Migrate(dir, true)
-	require.NoError(t, err)
-	assert.Equal(t, []string{main}, changed)
-	backups, _ := filepath.Glob(main + ".backup.*")
-	assert.Len(t, backups, 1)
-}
-
-func TestMigrateReportsUnwritableFragmentAndContinues(t *testing.T) {
-	dir := t.TempDir()
-	require.NoError(t, os.MkdirAll(filepath.Join(dir, "dms"), 0o755))
-	binds := filepath.Join(dir, "dms", "binds.conf")
-	layout := filepath.Join(dir, "dms", "layout.conf")
-	require.NoError(t, os.WriteFile(binds, []byte("exec-once=foo\n"), 0o444))
-	require.NoError(t, os.WriteFile(layout, []byte("borderpx=2\n"), 0o644))
-
-	changed, err := Snake.Migrate(dir, false)
-	assert.ErrorContains(t, err, "binds.conf")
-	assert.Equal(t, []string{layout}, changed)
-}
diff --git a/core/internal/mangoconf/migrate.go b/core/internal/mangoconf/migrate.go
deleted file mode 100644
index c06e89fb8..000000000
--- a/core/internal/mangoconf/migrate.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package mangoconf
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
-	"time"
-)
-
-// DMS-owned fragments under mango/dms; config.conf is the user's and only
-// migrated on request.
-var fragments = []string{"binds.conf", "colors.conf", "layout.conf", "cursor.conf", "input.conf", "outputs.conf", "windowrules.conf"}
-
-// Migrate respells the dms fragments, and config.conf (after a backup) when includeMain is set.
-// It returns the files rewritten; an unwritable file is reported without stopping the others.
-func (d Dialect) Migrate(mangoDir string, includeMain bool) ([]string, error) {
-	var changed []string
-	var errs []error
-	paths := make([]string, 0, len(fragments)+1)
-	for _, f := range fragments {
-		paths = append(paths, filepath.Join(mangoDir, "dms", f))
-	}
-	if includeMain {
-		paths = append(paths, filepath.Join(mangoDir, "config.conf"))
-	}
-	for _, path := range paths {
-		data, err := os.ReadFile(path)
-		if err != nil {
-			continue
-		}
-		translated := d.Translate(string(data))
-		if translated == string(data) {
-			continue
-		}
-		if filepath.Base(path) == "config.conf" {
-			backup := path + ".backup." + time.Now().Format("2006-01-02_15-04-05")
-			if err := os.WriteFile(backup, data, 0o644); err != nil {
-				errs = append(errs, fmt.Errorf("backup %s: %w", path, err))
-				continue
-			}
-		}
-		if err := os.WriteFile(path, []byte(translated), 0o644); err != nil {
-			errs = append(errs, fmt.Errorf("write %s: %w", path, err))
-			continue
-		}
-		changed = append(changed, path)
-	}
-	return changed, errors.Join(errs...)
-}
-
-func (d Dialect) String() string {
-	if d == Snake {
-		return "snake"
-	}
-	return "legacy"
-}
diff --git a/core/internal/matugen/matugen.go b/core/internal/matugen/matugen.go
index 0e79f3474..762724a36 100644
--- a/core/internal/matugen/matugen.go
+++ b/core/internal/matugen/matugen.go
@@ -20,7 +20,6 @@ import (
 
 	"github.com/duxlabs-dev/dux-shell/core/internal/dank16"
 	"github.com/duxlabs-dev/dux-shell/core/internal/log"
-	"github.com/duxlabs-dev/dux-shell/core/internal/mangoconf"
 	"github.com/duxlabs-dev/dux-shell/core/internal/utils"
 	"github.com/godbus/dbus/v5"
 	"github.com/lucasb-eyer/go-colorful"
@@ -44,7 +43,6 @@ const (
 	TemplateKindGTK
 	TemplateKindVSCode
 	TemplateKindEmacs
-	TemplateKindMango
 )
 
 type TemplateDef struct {
@@ -63,7 +61,7 @@ var templateRegistry = []TemplateDef{
 	{ID: "gtk", Kind: TemplateKindGTK, RunUnconditionally: true},
 	{ID: "niri", Commands: []string{"niri"}, ConfigFile: "niri.toml"},
 	{ID: "hyprland", Commands: []string{"Hyprland"}, ConfigFile: "hyprland.toml"},
-	{ID: "mangowc", Commands: []string{"mango"}, ConfigFile: "mangowc.toml", RequiredEnv: "MANGO_INSTANCE_SIGNATURE", Kind: TemplateKindMango},
+	{ID: "mangowc", Commands: []string{"mango"}, ConfigFile: "mangowc.toml", RequiredEnv: "MANGO_INSTANCE_SIGNATURE"},
 	{ID: "qt5ct", Commands: []string{"qt5ct"}, ConfigFile: "qt5ct.toml"},
 	{ID: "qt6ct", Commands: []string{"qt6ct"}, ConfigFile: "qt6ct.toml"},
 	{ID: "fcitx5", Commands: []string{"fcitx5"}, ConfigDirs: []string{"fcitx5"}, ConfigFile: "fcitx5.toml"},
@@ -725,12 +723,6 @@ output_path = '%s'
 			for _, editor := range vscodeEditors {
 				appendVSCodeConfig(cfgFile, editor.name, editor.extensionsDir(homeDir), opts.ShellDir)
 			}
-		case TemplateKindMango:
-			configFile := tmpl.ConfigFile
-			if mangoconf.Detect() == mangoconf.Snake {
-				configFile = "mangowc-snake.toml"
-			}
-			appendConfig(opts, cfgFile, tmpl.Commands, tmpl.Flatpaks, tmpl.ConfigDirs, configFile)
 		case TemplateKindEmacs:
 			if utils.EmacsConfigDir() != "" {
 				appendConfig(opts, cfgFile, tmpl.Commands, tmpl.Flatpaks, tmpl.ConfigDirs, tmpl.ConfigFile)
diff --git a/core/internal/matugen/matugen_test.go b/core/internal/matugen/matugen_test.go
index 6a37cc984..1ef9a1ddf 100644
--- a/core/internal/matugen/matugen_test.go
+++ b/core/internal/matugen/matugen_test.go
@@ -511,7 +511,7 @@ func TestBuildMergedConfigColorsOnly(t *testing.T) {
 	assert.False(t, strings.Contains(content, "output_path = 'CONFIG_DIR/"), "colors-only config should not emit app template outputs")
 }
 
-func TestBuildMergedConfigSkipsMangowcWithoutActiveSession(t *testing.T) {
+func TestBuildMergedConfigMangoSession(t *testing.T) {
 	t.Setenv("MANGO_INSTANCE_SIGNATURE", "")
 
 	tempDir := t.TempDir()
@@ -555,6 +555,31 @@ func TestBuildMergedConfigSkipsMangowcWithoutActiveSession(t *testing.T) {
 		t.Fatalf("failed to read merged config: %v", err)
 	}
 	assert.NotContains(t, string(output), "[templates.dmsmango]")
+
+	socket := filepath.Join(tempDir, "mango.sock")
+	if err := os.WriteFile(socket, nil, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("MANGO_INSTANCE_SIGNATURE", socket)
+	checker := mocks_utils.NewMockAppChecker(t)
+	checker.EXPECT().AnyCommandExists("mango").Return(true)
+	opts.AppChecker = checker
+	cfgFile, err = os.CreateTemp(tempDir, "merged-active-*.toml")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer cfgFile.Close()
+	if err := buildMergedConfig(opts, cfgFile, filepath.Join(tempDir, "templates")); err != nil {
+		t.Fatal(err)
+	}
+	if err := cfgFile.Close(); err != nil {
+		t.Fatal(err)
+	}
+	output, err = os.ReadFile(cfgFile.Name())
+	if err != nil {
+		t.Fatal(err)
+	}
+	assert.Contains(t, string(output), mangowcConfig)
 }
 
 func TestAppendConfigConfigDirExists(t *testing.T) {
diff --git a/core/internal/tui/views_config.go b/core/internal/tui/views_config.go
index 58147dab0..1f8792f5d 100644
--- a/core/internal/tui/views_config.go
+++ b/core/internal/tui/views_config.go
@@ -179,7 +179,7 @@ func (m Model) configReplacementNote() string {
 		if m.useSystemdConfig() && mangoconf.SessionTargetInstalled() {
 			return "Replacing Mango writes the DMS Mango template and starts the user systemd dms service with mango-session.target. Existing binds, monitor and window rules move into the dms/ files."
 		}
-		return "Replacing Mango writes the DMS Mango template and starts DMS from Mango with " + mangoconf.Detect().Key("exec_once") + "=dms run. Existing binds, monitor and window rules move into the dms/ files."
+		return "Replacing Mango writes the DMS Mango template and starts DMS from Mango with exec_once=dms run. Existing binds, monitor and window rules move into the dms/ files."
 	case config.BindsConfigType:
 		return "Keep uses your binds as they are; replace starts from the DMS stock binds. A timestamped backup is kept either way."
 	case "Ghostty":
diff --git a/core/internal/tui/views_install.go b/core/internal/tui/views_install.go
index ca9ae2940..5f5a0eb46 100644
--- a/core/internal/tui/views_install.go
+++ b/core/internal/tui/views_install.go
@@ -197,7 +197,7 @@ func (m Model) troubleshootingHints() (autostart, logs string) {
 		case deps.WindowManagerHyprland:
 			autostart = `remove hl.exec_cmd("dms run") from ~/.config/hypr/hyprland.lua`
 		default:
-			autostart = "remove '" + mangoconf.Detect().Key("exec_once") + "=dms run' from ~/.config/mango/config.conf"
+			autostart = "remove 'exec_once=dms run' from ~/.config/mango/config.conf"
 		}
 		return autostart, logs
 	}
@@ -206,7 +206,7 @@ func (m Model) troubleshootingHints() (autostart, logs string) {
 		if mangoconf.SessionTargetInstalled() {
 			return "rm ~/.config/systemd/user/mango-session.target.wants/dms.service", "journalctl --user -u dms"
 		}
-		return "remove '" + mangoconf.Detect().Key("exec_once") + "=dms run' from ~/.config/mango/config.conf", "qs -p ~/.config/quickshell/dms log"
+		return "remove 'exec_once=dms run' from ~/.config/mango/config.conf", "qs -p ~/.config/quickshell/dms log"
 	}
 	return "systemctl --user disable dms", "journalctl --user -u dms"
 }
diff --git a/core/internal/windowrules/providers/mango_parser.go b/core/internal/windowrules/providers/mango_parser.go
index cb888f698..5755ff563 100644
--- a/core/internal/windowrules/providers/mango_parser.go
+++ b/core/internal/windowrules/providers/mango_parser.go
@@ -11,19 +11,17 @@ import (
 	"github.com/duxlabs-dev/dux-shell/core/internal/windowrules"
 )
 
-// Mango window rules are flat `windowrule=key:value,...` lines (`window_rule=`
-// with snake_case fields after the upstream rename; both are read). DMS-managed rules
-// live in dms/windowrules.conf (sourced from config.conf), each preceded by an
-// `# @id=<id> @name=<name>` comment so they round-trip.
+// DMS-managed rules live in dms/windowrules.conf (sourced from config.conf),
+// each preceded by an `# @id=<id> @name=<name>` comment so they round-trip.
 
 type MangoWindowRule struct {
 	Source string
 	Fields map[string]string
 }
 
-var mangoWindowRuleRegex = regexp.MustCompile(`^(?:windowrule|window_rule)\s*=\s*(.+)$`)
+var mangoWindowRuleRegex = regexp.MustCompile(`^window_rule\s*=\s*(.+)$`)
 var mangoMetaCommentRegex = regexp.MustCompile(`^#\s*@id=(\S*)\s*@name=(.*)$`)
-var mangoOnceRuleRegex = regexp.MustCompile(`^(?:windowrule-once|window_rule_once)\s*=`)
+var mangoOnceRuleRegex = regexp.MustCompile(`^window_rule_once\s*=`)
 
 // Fields the editor models; anything else on a DMS rule line is carried through saves.
 var mangoModeledFields = map[string]bool{
@@ -42,7 +40,7 @@ func mangoUnmodeledFields(value string) [][2]string {
 		if !ok {
 			continue
 		}
-		key := mangoconf.Normalize(strings.TrimSpace(k))
+		key := strings.TrimSpace(k)
 		sized := (key == "width" || key == "height") && (!hasWidth || !hasHeight)
 		if key != "" && (!mangoModeledFields[key] || sized) {
 			extra = append(extra, [2]string{key, strings.TrimSpace(v)})
@@ -62,7 +60,7 @@ func parseMangoWindowRuleLine(value string) map[string]string {
 		if !ok {
 			continue
 		}
-		key := mangoconf.Normalize(strings.TrimSpace(before))
+		key := strings.TrimSpace(before)
 		val := strings.TrimSpace(after)
 		if key != "" {
 			fields[key] = val
@@ -89,7 +87,7 @@ func mangoOverridePath(configDir string) string {
 	return filepath.Join(configDir, "dms", "windowrules.conf")
 }
 
-// parseMangoRulesFile reads a config file and returns its windowrule= lines.
+// parseMangoRulesFile reads a config file and returns its window_rule= lines.
 func parseMangoRulesFile(path, source string) []MangoWindowRule {
 	data, err := os.ReadFile(path)
 	if err != nil {
@@ -215,11 +213,11 @@ func ConvertMangoRulesToWindowRules(mangoRules []MangoWindowRule) []windowrules.
 	return result
 }
 
-func formatMangoRule(rule windowrules.WindowRule, dialect mangoconf.Dialect, extra ...[2]string) string {
+func formatMangoRule(rule windowrules.WindowRule, extra ...[2]string) string {
 	var parts []string
 	add := func(k, v string) {
 		if v != "" {
-			parts = append(parts, dialect.Key(k)+":"+v)
+			parts = append(parts, k+":"+v)
 		}
 	}
 
@@ -235,7 +233,7 @@ func formatMangoRule(rule windowrules.WindowRule, dialect mangoconf.Dialect, ext
 
 	addBool := func(k string, b *bool) {
 		if b != nil {
-			parts = append(parts, dialect.Key(k)+":"+mangoBoolStr(b))
+			parts = append(parts, k+":"+mangoBoolStr(b))
 		}
 	}
 	addBool("is_floating", rule.Actions.OpenFloating)
@@ -249,19 +247,18 @@ func formatMangoRule(rule windowrules.WindowRule, dialect mangoconf.Dialect, ext
 		add(kv[0], kv[1])
 	}
 
-	return dialect.Key("window_rule") + "=" + strings.Join(parts, ",")
+	return "window_rule=" + strings.Join(parts, ",")
 }
 
 type MangoWritableProvider struct {
 	configDir string
-	dialect   mangoconf.Dialect
 	// Filled by LoadDMSRules so the following write keeps what the editor cannot show.
 	extraFields map[string][][2]string
 	onceLines   []string
 }
 
 func NewMangoWritableProvider(configDir string) *MangoWritableProvider {
-	return &MangoWritableProvider{configDir: configDir, dialect: mangoconf.Detect()}
+	return &MangoWritableProvider{configDir: configDir}
 }
 
 func (p *MangoWritableProvider) Name() string { return "mango" }
@@ -360,7 +357,7 @@ func (p *MangoWritableProvider) WriteDMSRules(rules []windowrules.WindowRule) er
 		if id == "" {
 			id = fmt.Sprintf("rule_%d", i)
 		}
-		line := formatMangoRule(r, p.dialect, p.extraFields[r.ID]...)
+		line := formatMangoRule(r, p.extraFields[r.ID]...)
 		if err := mangoconf.CheckLine(line); err != nil {
 			return fmt.Errorf("rule %q: %w", r.Name, err)
 		}
@@ -369,7 +366,7 @@ func (p *MangoWritableProvider) WriteDMSRules(rules []windowrules.WindowRule) er
 		sb.WriteString("\n\n")
 	}
 	for _, line := range p.onceLines {
-		sb.WriteString(p.dialect.Translate(line))
+		sb.WriteString(line)
 		sb.WriteString("\n")
 	}
 
diff --git a/core/internal/windowrules/providers/mango_parser_test.go b/core/internal/windowrules/providers/mango_parser_test.go
index 1953bc6eb..8debcf1eb 100644
--- a/core/internal/windowrules/providers/mango_parser_test.go
+++ b/core/internal/windowrules/providers/mango_parser_test.go
@@ -6,14 +6,13 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/duxlabs-dev/dux-shell/core/internal/mangoconf"
 	"github.com/duxlabs-dev/dux-shell/core/internal/windowrules"
 )
 
-func TestParseMangoWindowRuleLineReadsBothDialects(t *testing.T) {
+func TestParseMangoWindowRuleLineSplitsFields(t *testing.T) {
 	for _, line := range []string{
-		"appid:firefox,title:Gmail,isfloating:1,tags:2,monitor:HDMI-A-1",
 		"app_id:firefox,title:Gmail,is_floating:1,tags:2,monitor:HDMI-A-1",
+		"app_id: firefox , title:Gmail,is_floating:1,tags:2,monitor:HDMI-A-1",
 	} {
 		fields := parseMangoWindowRuleLine(line)
 		want := map[string]string{"app_id": "firefox", "title": "Gmail", "is_floating": "1", "tags": "2", "monitor": "HDMI-A-1"}
@@ -25,13 +24,10 @@ func TestParseMangoWindowRuleLineReadsBothDialects(t *testing.T) {
 	}
 }
 
-func TestMangoRulesWrittenInInstalledDialect(t *testing.T) {
+func TestMangoRulesWrittenInSnakeCase(t *testing.T) {
 	floating := true
 	rule := windowrules.WindowRule{MatchCriteria: windowrules.MatchCriteria{AppID: "discord"}, Actions: windowrules.Actions{OpenFloating: &floating, NoAnim: &floating}}
-	if got, want := formatMangoRule(rule, mangoconf.Legacy), "windowrule=appid:discord,isfloating:1,isnoanimation:1"; got != want {
-		t.Errorf("legacy = %q, want %q", got, want)
-	}
-	if got, want := formatMangoRule(rule, mangoconf.Snake), "window_rule=app_id:discord,is_floating:1,no_animation:1"; got != want {
+	if got, want := formatMangoRule(rule), "window_rule=app_id:discord,is_floating:1,no_animation:1"; got != want {
 		t.Errorf("snake = %q, want %q", got, want)
 	}
 
@@ -39,7 +35,7 @@ func TestMangoRulesWrittenInInstalledDialect(t *testing.T) {
 	rulesPath := filepath.Join(dir, "dms", "windowrules.conf")
 	_ = os.MkdirAll(filepath.Dir(rulesPath), 0o755)
 	_ = os.WriteFile(rulesPath, []byte("# @id=a @name=A\nwindow_rule=app_id:discord,is_floating:1\n"), 0o644)
-	loaded, err := (&MangoWritableProvider{configDir: dir, dialect: mangoconf.Snake}).LoadDMSRules()
+	loaded, err := (&MangoWritableProvider{configDir: dir}).LoadDMSRules()
 	if err != nil || len(loaded) != 1 || loaded[0].MatchCriteria.AppID != "discord" || loaded[0].Actions.OpenFloating == nil {
 		t.Fatalf("snake rule not loaded: %+v, %v", loaded, err)
 	}
@@ -47,7 +43,7 @@ func TestMangoRulesWrittenInInstalledDialect(t *testing.T) {
 
 func TestConvertMangoRulesToWindowRules(t *testing.T) {
 	mangoRules := []MangoWindowRule{
-		{Source: "config.conf", Fields: parseMangoWindowRuleLine("appid:discord,tags:9,isfloating:1,noblur:1")},
+		{Source: "config.conf", Fields: parseMangoWindowRuleLine("app_id:discord,tags:9,is_floating:1,no_blur:1")},
 	}
 	rules := ConvertMangoRulesToWindowRules(mangoRules)
 	if len(rules) != 1 {
@@ -141,9 +137,9 @@ func TestMangoRuleSaveKeepsUnmodeledFieldsAndOnceRules(t *testing.T) {
 	dir := t.TempDir()
 	path := filepath.Join(dir, "dms", "windowrules.conf")
 	_ = os.MkdirAll(filepath.Dir(path), 0o755)
-	_ = os.WriteFile(path, []byte("# @id=a @name=A\nwindowrule=appid:mpv,isglobal:1,offsetx:20,width:0.5\nwindowrule-once=appid:firefox,tags:2\n"), 0o644)
+	_ = os.WriteFile(path, []byte("# @id=a @name=A\nwindow_rule=app_id:mpv,is_global:1,offset_x:20,width:0.5\nwindow_rule_once=app_id:firefox,tags:2\n"), 0o644)
 
-	p := &MangoWritableProvider{configDir: dir, dialect: mangoconf.Legacy}
+	p := &MangoWritableProvider{configDir: dir}
 	floating := true
 	if err := p.SetRule(windowrules.WindowRule{ID: "b", Name: "B", MatchCriteria: windowrules.MatchCriteria{AppID: "foot"}, Actions: windowrules.Actions{OpenFloating: &floating}}); err != nil {
 		t.Fatal(err)
@@ -151,9 +147,9 @@ func TestMangoRuleSaveKeepsUnmodeledFieldsAndOnceRules(t *testing.T) {
 	data, _ := os.ReadFile(path)
 	got := string(data)
 	for _, want := range []string{
-		"windowrule=appid:mpv,isglobal:1,offsetx:20,width:0.5\n",
-		"windowrule=appid:foot,isfloating:1\n",
-		"windowrule-once=appid:firefox,tags:2\n",
+		"window_rule=app_id:mpv,is_global:1,offset_x:20,width:0.5\n",
+		"window_rule=app_id:foot,is_floating:1\n",
+		"window_rule_once=app_id:firefox,tags:2\n",
 	} {
 		if !strings.Contains(got, want) {
 			t.Errorf("missing %q in:\n%s", want, got)
diff --git a/quickshell/Common/OutputModel.js b/quickshell/Common/OutputModel.js
index 36a7620eb..aa8e433e1 100644
--- a/quickshell/Common/OutputModel.js
+++ b/quickshell/Common/OutputModel.js
@@ -420,7 +420,7 @@ function parseMangoOutputs(content) {
     const result = {};
     for (const line of content.split("\n")) {
         const trimmed = line.trim();
-        const match = trimmed.match(/^(?:monitorrule|monitor_rule)\s*=\s*(.*)$/);
+        const match = trimmed.match(/^monitor_rule\s*=\s*(.*)$/);
         if (!match)
             continue;
         const entry = parseMangoRule(match[1]);
@@ -445,10 +445,10 @@ function mangoRuleFields(rule) {
 
 // Mango applies only the first matching monitor rule and resets hdr/icc/disable a rule omits,
 // so unmodeled fields of every existing rule for an output are carried into DMS's rule, first one winning.
-function mangoMonitorRuleLines(outputsData, existingText, snakeKeys) {
+function mangoMonitorRuleLines(outputsData, existingText) {
     const carried = {};
     for (const line of (existingText || "").split("\n")) {
-        const match = line.trim().match(/^(?:monitorrule|monitor_rule)\s*=\s*(.*)$/);
+        const match = line.trim().match(/^monitor_rule\s*=\s*(.*)$/);
         if (!match)
             continue;
         const fields = mangoRuleFields(match[1]);
@@ -496,7 +496,7 @@ function mangoMonitorRuleLines(outputsData, existingText, snakeKeys) {
         }
         if (output.enabled === false)
             fields.push("disable:1");
-        lines.push((snakeKeys ? "monitor_rule=" : "monitorrule=") + fields.join(","));
+        lines.push("monitor_rule=" + fields.join(","));
     }
     return lines;
 }
diff --git a/quickshell/Modules/Settings/CompositorLayoutTab.qml b/quickshell/Modules/Settings/CompositorLayoutTab.qml
index 4b47c9e5a..292fdfa10 100644
--- a/quickshell/Modules/Settings/CompositorLayoutTab.qml
+++ b/quickshell/Modules/Settings/CompositorLayoutTab.qml
@@ -739,7 +739,7 @@ awk '$1 == "xray" { print FILENAME ":" FNR; exit }' $files 2>/dev/null`;
             }
 
             SettingsSliderRow {
-                tags: ["mangowc", "mango", "gaps", "override", "inner", "gappih", "gappiv"]
+                tags: ["mangowc", "mango", "gaps", "override", "inner", "gap_inner_horizontal", "gap_inner_vertical", "gappih", "gappiv"]
                 settingKey: "mangoLayoutGapsOverride"
                 resetKeys: []
                 text: I18n.tr("Inner gaps")
@@ -752,7 +752,7 @@ awk '$1 == "xray" { print FILENAME ":" FNR; exit }' $files 2>/dev/null`;
             }
 
             SettingsSliderRow {
-                tags: ["mangowc", "mango", "gaps", "override", "outer", "edge", "gappoh", "gappov"]
+                tags: ["mangowc", "mango", "gaps", "override", "outer", "edge", "gap_outer_horizontal", "gap_outer_vertical", "gappoh", "gappov"]
                 settingKey: "mangoLayoutGapsOutOverride"
                 text: I18n.tr("Outer gaps")
                 visible: SettingsData.mangoLayoutGapsOverride >= 0
@@ -772,7 +772,7 @@ awk '$1 == "xray" { print FILENAME ":" FNR; exit }' $files 2>/dev/null`;
             }
 
             SettingsToggleSliderRow {
-                tags: ["mangowc", "mango", "border", "override", "borderpx"]
+                tags: ["mangowc", "mango", "border", "override", "border_px", "borderpx"]
                 settingKey: "mangoLayoutBorderSizeEnabled"
                 text: I18n.tr("Override border size")
                 checked: SettingsData.mangoLayoutBorderSize >= 0
diff --git a/quickshell/Services/MangoService.qml b/quickshell/Services/MangoService.qml
index 9122634c0..ba2b1b5d0 100644
--- a/quickshell/Services/MangoService.qml
+++ b/quickshell/Services/MangoService.qml
@@ -31,9 +31,6 @@ Singleton {
     readonly property string inputPath: mangoDmsDir + "/input.conf"
     readonly property string windowRulesPath: mangoDmsDir + "/windowrules.conf"
 
-    // Mango after 0.17.5 renamed every config key to snake_case with no aliases.
-    property bool snakeKeys: false
-    property bool dialectReady: false
     property bool inputGenerationPending: false
     property bool inputGenerationRunning: false
     property int _lastGapValue: -1
@@ -587,21 +584,11 @@ Singleton {
     Connections {
         target: CompositorService
         function onIsMangoChanged() {
-            if (CompositorService.isMango)
-                detectDialect();
-        }
-    }
-
-    // Also respells the DMS fragments for the installed Mango; an older dms keeps legacy keys.
-    function detectDialect() {
-        Proc.runCommand("mango-dialect", [Proc.dmsBin, "config", "mango-migrate"], (output, exitCode) => {
-            if (exitCode !== 0)
-                log.warn("mango-migrate exited", exitCode, "- some fragments may keep the old key spelling");
-            root.snakeKeys = output.trim().split("\n").pop() === "snake";
-            root.dialectReady = true;
+            if (!CompositorService.isMango)
+                return;
             generateLayoutConfig();
             generateInputConfig();
-        });
+        }
     }
 
     function generateOutputsConfig(outputsData, callback, skipReload) {
@@ -612,7 +599,7 @@ Singleton {
         }
         // outputs.conf is sourced first, so its rules win over config.conf's; read both for carried fields.
         Proc.runCommand("mango-read-outputs", ["sh", "-c", `cat "${outputsPath}" "${configPath}" 2>/dev/null`], existing => {
-            const lines = ["# Auto-generated by DMS - do not edit manually", ""].concat(OutputModel.mangoMonitorRuleLines(outputsData, existing, root.snakeKeys), [""]);
+            const lines = ["# Auto-generated by DMS - do not edit manually", ""].concat(OutputModel.mangoMonitorRuleLines(outputsData, existing), [""]);
             const content = lines.join("\n");
 
             suppressWatchedConfigReloads(1500);
@@ -646,21 +633,16 @@ Singleton {
         const gapsOut = (gapsOverride >= 0 && SettingsData.mangoLayoutGapsOutOverride >= 0) ? SettingsData.mangoLayoutGapsOutOverride : gapsIn;
         const borderSize = (typeof SettingsData !== "undefined" && SettingsData.mangoLayoutBorderSize >= 0) ? SettingsData.mangoLayoutBorderSize : defaultBorderSize;
 
-        const snake = root.snakeKeys;
         let content = `# Auto-generated by DMS - do not edit manually
 border_radius=${cornerRadius}
-${snake ? "border_px" : "borderpx"}=${borderSize}
+border_px=${borderSize}
 `;
 
         if (manageGaps)
-            content += snake ? `gap_inner_horizontal=${gapsIn}
+            content += `gap_inner_horizontal=${gapsIn}
 gap_inner_vertical=${gapsIn}
 gap_outer_horizontal=${gapsOut}
 gap_outer_vertical=${gapsOut}
-` : `gappih=${gapsIn}
-gappiv=${gapsIn}
-gappoh=${gapsOut}
-gappov=${gapsOut}
 `;
 
         suppressWatchedConfigReloads(1500);
@@ -727,14 +709,9 @@ cursor_size=${size}`;
         inputGenerationPending = false;
         if (!CompositorService.isMango)
             return;
-        // numlock is spelled per dialect, so the first write waits for mango-migrate
-        if (!dialectReady) {
-            inputGenerationPending = true;
-            return;
-        }
         inputGenerationRunning = true;
 
-        const content = ["# Auto-generated by DMS - do not edit manually"].concat(mangoInputLines(SettingsData, snakeKeys), [""]).join("\n");
+        const content = ["# Auto-generated by DMS - do not edit manually"].concat(mangoInputLines(SettingsData), [""]).join("\n");
         // Exit 3 = unchanged, so a shell start does not reload Mango for nothing
         const script = `mkdir -p "${mangoDmsDir}" && cat > "${inputPath}.tmp" << 'EOF'\n${content}EOF\nif cmp -s "${inputPath}.tmp" "${inputPath}"; then rm -f "${inputPath}.tmp"; exit 3; fi\nmv -f "${inputPath}.tmp" "${inputPath}"`;
         suppressWatchedConfigReloads(1500);
@@ -757,7 +734,7 @@ cursor_size=${size}`;
     }
 
     // Mouse and trackpad keys are the split names Mango has had since 0.16.1; libinput enums are numeric
-    function mangoInputLines(s, snake) {
+    function mangoInputLines(s) {
         const flag = value => value ? 1 : 0;
         const profile = name => name === "flat" ? 1 : name === "adaptive" ? 2 : -1;
         const scrollMethod = name => ({
@@ -806,7 +783,7 @@ cursor_size=${size}`;
             add("repeat_delay", s.keyboardRepeatDelay);
         if (s.keyboardRepeatRate > 0)
             add("repeat_rate", s.keyboardRepeatRate);
-        add(snake ? "numlock_on" : "numlockon", flag(s.keyboardNumlock));
+        add("numlock_on", flag(s.keyboardNumlock));
         return lines;
     }
 }
diff --git a/quickshell/matugen/configs/mangowc-snake.toml b/quickshell/matugen/configs/mangowc-snake.toml
deleted file mode 100644
index f4f00c0b5..000000000
--- a/quickshell/matugen/configs/mangowc-snake.toml
+++ /dev/null
@@ -1,4 +0,0 @@
-[templates.dmsmango]
-input_path = 'SHELL_DIR/matugen/templates/mango-colors-snake.conf'
-output_path = 'CONFIG_DIR/mango/dms/colors.conf'
-post_hook = 'sh -c "[ -n \"$MANGO_INSTANCE_SIGNATURE\" ] && mmsg dispatch reload_config || true"'
diff --git a/quickshell/matugen/templates/mango-colors-snake.conf b/quickshell/matugen/templates/mango-colors-snake.conf
deleted file mode 100644
index 88cae24b9..000000000
--- a/quickshell/matugen/templates/mango-colors-snake.conf
+++ /dev/null
@@ -1,6 +0,0 @@
-# ! Auto-generated file. Do not edit directly.
-# Remove source = ./dms/colors.conf from your config to override.
-
-border_color = 0x{{colors.outline.default.hex_stripped}}ff
-focus_color  = 0x{{colors.primary.default.hex_stripped}}ff
-urgent_color = 0x{{colors.error.default.hex_stripped}}ff
diff --git a/quickshell/matugen/templates/mango-colors.conf b/quickshell/matugen/templates/mango-colors.conf
index 72d8ece20..88cae24b9 100644
--- a/quickshell/matugen/templates/mango-colors.conf
+++ b/quickshell/matugen/templates/mango-colors.conf
@@ -1,6 +1,6 @@
 # ! Auto-generated file. Do not edit directly.
 # Remove source = ./dms/colors.conf from your config to override.
 
-bordercolor = 0x{{colors.outline.default.hex_stripped}}ff
-focuscolor  = 0x{{colors.primary.default.hex_stripped}}ff
-urgentcolor = 0x{{colors.error.default.hex_stripped}}ff
+border_color = 0x{{colors.outline.default.hex_stripped}}ff
+focus_color  = 0x{{colors.primary.default.hex_stripped}}ff
+urgent_color = 0x{{colors.error.default.hex_stripped}}ff
diff --git a/quickshell/tests/config-include.test.mjs b/quickshell/tests/config-include.test.mjs
index 2d1af4e14..528203863 100644
--- a/quickshell/tests/config-include.test.mjs
+++ b/quickshell/tests/config-include.test.mjs
@@ -54,7 +54,7 @@ test("repair preserves config and fragments, backs up, and adds live includes on
     }
 });
 
-test("mango input fragment maps choices onto libinput numbers and spells numlock per dialect", () => {
+test("mango input fragment maps choices onto libinput numbers and spells numlock in snake_case", () => {
     const SPEC = loadScript(new URL("../Common/settings/SettingsSpec.js", import.meta.url)).SPEC;
     const source = readFileSync(new URL("../Services/MangoService.qml", import.meta.url), "utf8");
     const found = source.match(/^    function mangoInputLines\([^)]*\) \{\n[\s\S]*?^    \}/m);
@@ -62,7 +62,7 @@ test("mango input fragment maps choices onto libinput numbers and spells numlock
     const scope = vm.createContext({});
     vm.runInContext(found[0], scope);
     const defaults = Object.fromEntries(Object.keys(SPEC).filter(key => /^(mouse|touchpad|keyboard)[A-Z]|^focusFollowsMouse$/.test(key)).map(key => [key, SPEC[key].def]));
-    const lines = (overrides, snake = false) => [...scope.mangoInputLines(Object.assign({}, defaults, overrides), snake)];
+    const lines = overrides => [...scope.mangoInputLines(Object.assign({}, defaults, overrides))];
     const value = (list, key) => list.find(line => line.startsWith(key + "="))?.slice(key.length + 1);
 
     const stock = lines({});
@@ -79,8 +79,8 @@ test("mango input fragment maps choices onto libinput numbers and spells numlock
     assert.equal(value(chosen, "xkb_rules_layout"), "us,de");
     assert.equal(value(chosen, "xkb_rules_variant"), undefined, "empty fields stay out");
     assert.equal(value(chosen, "repeat_delay"), "300");
-    assert.equal(value(chosen, "numlockon"), "0");
-    assert.equal(value(lines({ keyboardNumlock: true }, true), "numlock_on"), "1");
+    assert.equal(value(chosen, "numlock_on"), "0");
+    assert.equal(value(lines({ keyboardNumlock: true }), "numlock_on"), "1");
 
     assert.equal(value(stock, "sloppy_focus"), undefined, "untouched focus mode stays Mango's");
     for (const mode of [0, 1])
diff --git a/quickshell/tests/fixtures/outputs/mango-monitors.conf b/quickshell/tests/fixtures/outputs/mango-monitors.conf
index c9ff4f75c..8a90d27c9 100644
--- a/quickshell/tests/fixtures/outputs/mango-monitors.conf
+++ b/quickshell/tests/fixtures/outputs/mango-monitors.conf
@@ -1,8 +1,8 @@
 # Auto-generated by DMS - do not edit manually
 
-monitorrule=name:^DP-1$,width:2560,height:1440,refresh:143.998,x:0,y:0,scale:1.25,rr:1,vrr:1
-monitorrule=name:^eDP-1$,x:0,y:1440,scale:1,rr:0,vrr:0
-monitorrule=name:HDMI-A-1,width:1920,height:1080,refresh:60,x:2048,y:0,scale:1,rr:5,vrr:0
-monitorrule=width:1920,height:1080
-monitorrule=name:^DP-2$,width:1920,height:1080,refresh:59.95,x:-1920,y:0,scale:1.333,rr:7,vrr:1
+monitor_rule=name:^DP-1$,width:2560,height:1440,refresh:143.998,x:0,y:0,scale:1.25,rr:1,vrr:1
+monitor_rule=name:^eDP-1$,x:0,y:1440,scale:1,rr:0,vrr:0
+monitor_rule=name:HDMI-A-1,width:1920,height:1080,refresh:60,x:2048,y:0,scale:1,rr:5,vrr:0
+monitor_rule=width:1920,height:1080
+monitor_rule=name:^DP-2$,width:1920,height:1080,refresh:59.95,x:-1920,y:0,scale:1.333,rr:7,vrr:1
 monitor_rule=name:^DP-3$,rr:9
diff --git a/quickshell/tests/output-model.test.mjs b/quickshell/tests/output-model.test.mjs
index f589990c4..d6595eabf 100644
--- a/quickshell/tests/output-model.test.mjs
+++ b/quickshell/tests/output-model.test.mjs
@@ -79,7 +79,7 @@ test("hyprland lua parser: quoted and long-bracket strings, hdr fields, mode-les
     assert.equal(model.parseHyprlandLuaMonitorLine("hl.monitor({ scale = 1 })"), null);
 });
 
-test("mango parser: both key spellings, anchors stripped, defaults filled, nameless rule skipped, out-of-range rotation is Normal", () => {
+test("mango parser: anchors stripped, defaults filled, nameless rule skipped, out-of-range rotation is Normal", () => {
     const parsed = plain(model.parseMangoOutputs(text("mango-monitors.conf")));
     assert.deepEqual(Object.keys(parsed), ["DP-1", "eDP-1", "HDMI-A-1", "DP-2", "DP-3"]);
     assert.deepEqual(parsed["DP-1"], { name: "DP-1", logical: { x: 0, y: 0, scale: 1.25, transform: "90" }, modes: [{ width: 2560, height: 1440, refresh_rate: 143998 }], current_mode: 0, vrr_enabled: true, vrr_supported: true });
@@ -306,21 +306,20 @@ test("modeAlreadyCurrent tolerates the refresh tolerance, restoreModeValue keeps
     assert.equal(model.niriCurrentMode({ current_mode: 0 }), null);
 });
 
-test("mango rule writer carries hdr/icc/disable from existing rules, keeps fractional refresh, honours the dialect", () => {
+test("mango rule writer carries hdr/icc/disable from existing rules, keeps fractional refresh, writes snake_case", () => {
     const outputs = {
         "DP-1": { configured_mode: "2560x1440@59.951", logical: { x: 0, y: 0, scale: 1, transform: "Normal" }, vrr_enabled: true, enabled: true },
         "HDMI-A-1": { modes: [{ width: 1920, height: 1080, refresh_rate: 60000 }], current_mode: 0, logical: { x: 2560, y: 0, scale: 1, transform: "90" }, enabled: false }
     };
     const existing = [
-        "monitorrule=name:^DP-1$,width:2560,height:1440,refresh:60,x:0,y:0,scale:1,rr:0,vrr:0,icc:/p.icc,disable:1",
+        "monitor_rule=name:^DP-1$,width:2560,height:1440,refresh:60,x:0,y:0,scale:1,rr:0,vrr:0,icc:/p.icc,disable:1",
         "monitor_rule=name:DP-1,hdr:1,icc:/ignored.icc",
-        "monitorrule=name:^HDMI-A-1$,primary:1"
+        "monitor_rule=name:^HDMI-A-1$,primary:1"
     ].join("\n");
-    assert.deepEqual(model.mangoMonitorRuleLines(outputs, existing, false), [
-        "monitorrule=name:^DP-1$,width:2560,height:1440,refresh:59.951,x:0,y:0,scale:1,rr:0,vrr:1,icc:/p.icc,hdr:1",
-        "monitorrule=name:^HDMI-A-1$,width:1920,height:1080,refresh:60,x:2560,y:0,scale:1,rr:1,vrr:0,primary:1,disable:1"
+    assert.deepEqual(model.mangoMonitorRuleLines(outputs, existing), [
+        "monitor_rule=name:^DP-1$,width:2560,height:1440,refresh:59.951,x:0,y:0,scale:1,rr:0,vrr:1,icc:/p.icc,hdr:1",
+        "monitor_rule=name:^HDMI-A-1$,width:1920,height:1080,refresh:60,x:2560,y:0,scale:1,rr:1,vrr:0,primary:1,disable:1"
     ]);
-    assert.ok(model.mangoMonitorRuleLines(outputs, "", true).every(line => line.startsWith("monitor_rule=")));
 });
 
 test("hyprland hardwareDetails gate vrr and color modes like Hyprland does, and gate nothing when absent", () => {
diff --git a/quickshell/translations/settings_search_index.json b/quickshell/translations/settings_search_index.json
index 7a4cf6419..e57af0cfe 100644
--- a/quickshell/translations/settings_search_index.json
+++ b/quickshell/translations/settings_search_index.json
@@ -12697,6 +12697,8 @@
     "tabIndex": 37,
     "category": "System & integrations",
     "keywords": [
+      "gap_inner_horizontal",
+      "gap_inner_vertical",
       "gappih",
       "gappiv",
       "gaps",
@@ -12964,6 +12966,8 @@
     "category": "System & integrations",
     "keywords": [
       "edge",
+      "gap_outer_horizontal",
+      "gap_outer_vertical",
       "gappoh",
       "gappov",
       "gaps",
@@ -12999,6 +13003,7 @@
     "category": "System & integrations",
     "keywords": [
       "border",
+      "border_px",
       "borderpx",
       "integrations",
       "mango",