feat(charm): add lipgloss styling with Slack brand colors under charm experiment

cmd/manifest/validate.go

@@ -93,14 +93,14 @@ func NewValidateCommand(clients *shared.ClientFactory) *cobra.Command {
 					cmd.Printf(
 						"\n%s: %s\n",
 						style.Bold("App Manifest Validation Result"),
-						style.Styler().Green("Valid"),
+						style.Green("Valid"),
 					)
 					clients.IO.PrintTrace(ctx, slacktrace.ManifestValidateSuccess)
 				} else {
 					cmd.Printf(
 						"\n%s: %s\n",
 						style.Bold("App Manifest Validation Result"),
-						style.Styler().Red("InValid"),
+						style.Red("InValid"),
 					)
 				}
 			}

cmd/root.go

@@ -44,6 +44,7 @@ import (
 	"github.com/slackapi/slack-cli/cmd/upgrade"
 	versioncmd "github.com/slackapi/slack-cli/cmd/version"
 	"github.com/slackapi/slack-cli/internal/cmdutil"
+	"github.com/slackapi/slack-cli/internal/experiment"
 	"github.com/slackapi/slack-cli/internal/iostreams"
 	"github.com/slackapi/slack-cli/internal/pkg/version"
 	"github.com/slackapi/slack-cli/internal/shared"
@@ -297,6 +298,7 @@ func InitConfig(ctx context.Context, clients *shared.ClientFactory, rootCmd *cob
 
 	// Init configurations
 	clients.Config.LoadExperiments(ctx, clients.IO.PrintDebug)
+	style.ToggleCharm(clients.Config.WithExperimentOn(experiment.Charm))
 	// TODO(slackcontext) Consolidate storing CLI version to slackcontext
 	clients.Config.Version = clients.CLIVersion
 

cmd/upgrade/upgrade.go

@@ -74,9 +74,9 @@ func checkForUpdates(clients *shared.ClientFactory, cmd *cobra.Command) error {
 	}
 
 	if clients.SDKConfig.Hooks.CheckUpdate.IsAvailable() {
-		cmd.Printf("%s You are using the latest Slack CLI and SDK versions\n", style.Styler().Green("✔").String())
+		cmd.Printf("%s You are using the latest Slack CLI and SDK versions\n", style.Green("✔"))
 	} else {
-		cmd.Printf("%s You are using the latest Slack CLI version\n", style.Styler().Green("✔").String())
+		cmd.Printf("%s You are using the latest Slack CLI version\n", style.Green("✔"))
 	}
 
 	return nil

internal/iostreams/printer.go

@@ -89,7 +89,7 @@ func (io *IOStreams) PrintInfo(ctx context.Context, shouldTrace bool, format str
 		span, _ := opentracing.StartSpanFromContext(ctx, "printInfo", opentracing.Tag{Key: "printInfo", Value: message})
 		defer span.Finish()
 	}
-	io.Stdout.Println(style.Styler().Reset(message))
+	io.Stdout.Println(message)
 }
 
 // PrintTrace prints traceID and values to stdout if SLACK_TEST_TRACE=true

internal/pkg/apps/install.go

@@ -869,12 +869,12 @@ func continueDespiteWarning(ctx context.Context, clients *shared.ClientFactory,
 			clients.IO.PrintInfo(ctx, false,
 				"\n%s: %s",
 				style.Bold("Changes confirmed"),
-				style.Styler().Green("Continuing with install."),
+				style.Green("Continuing with install."),
 			)
 			return true, nil
 		}
 
-		clients.IO.PrintInfo(ctx, false, "\n%s", style.Styler().Red("App install canceled."))
+		clients.IO.PrintInfo(ctx, false, "\n%s", style.Red("App install canceled."))
 
 		return false, nil
 	}

internal/pkg/platform/activity.go

@@ -220,9 +220,9 @@ func prettifyActivity(activity api.Activity) (log string) {
 
 	switch activity.Level {
 	case types.WARN:
-		return style.Styler().Yellow(msg).String()
+		return style.Yellow(msg)
 	case types.ERROR, types.FATAL:
-		return style.Styler().Red(msg).String()
+		return style.Red(msg)
 	}
 
 	return msg
@@ -282,7 +282,7 @@ func externalAuthResultToString(activity api.Activity) (result string) {
 		msg = msg + "\n\t\t" + strings.ReplaceAll(activity.Payload["extra_message"].(string), "\n", "\n\t\t")
 	}
 
-	return style.Styler().Gray(13, msg).String()
+	return style.Gray(msg)
 }
 
 func externalAuthStartedToString(activity api.Activity) (result string) {
@@ -300,7 +300,7 @@ func externalAuthStartedToString(activity api.Activity) (result string) {
 		msg = msg + "\n\t" + strings.ReplaceAll(activity.Payload["code"].(string), "\n", "\n\t")
 	}
 
-	return style.Styler().Gray(13, msg).String()
+	return style.Gray(msg)
 }
 
 func externalAuthTokenFetchResult(activity api.Activity) (result string) {
@@ -318,13 +318,13 @@ func externalAuthTokenFetchResult(activity api.Activity) (result string) {
 		msg = msg + "\n\t" + strings.ReplaceAll(activity.Payload["code"].(string), "\n", "\n\t")
 	}
 
-	return style.Styler().Gray(13, msg).String()
+	return style.Gray(msg)
 }
 
 func functionDeploymentToString(activity api.Activity) (result string) {
 	msg := fmt.Sprintf("Application %sd by user '%s' on team '%s'", activity.Payload["action"], activity.Payload["user_id"], activity.Payload["team_id"])
 	msg = fmt.Sprintf("%s %s [%s] %s", style.Emoji("cloud"), activity.CreatedPretty(), activity.Level, msg)
-	return style.Styler().Gray(13, msg).String()
+	return style.Gray(msg)
 }
 
 func functionExecutionOutputToString(activity api.Activity) (result string) {

internal/style/charm_theme.go

@@ -15,27 +15,13 @@
 package style
 
 // Slack brand theme for charmbracelet/huh prompts.
-// Uses official Slack brand colors to give the CLI a fun, playful feel.
+// Uses official Slack brand colors defined in colors.go.
 
 import (
 	"github.com/charmbracelet/huh"
 	"github.com/charmbracelet/lipgloss"
 )
 
-// Slack brand colors according to https://a.slack-edge.com/4d5bb/marketing/img/media-kit/slack_brand_guidelines_september2020.pdf
-var (
-	slackAubergine       = lipgloss.Color("#7C2852")
-	slackBlue            = lipgloss.Color("#36c5f0")
-	slackGreen           = lipgloss.Color("#2eb67d")
-	slackYellow          = lipgloss.Color("#ecb22e")
-	slackRed             = lipgloss.Color("#e01e5a")
-	slackPool            = lipgloss.Color("#78d7dd")
-	slackLegalGray       = lipgloss.Color("#5e5d60")
-	slackOptionText      = lipgloss.AdaptiveColor{Light: "#1d1c1d", Dark: "#f4ede4"}
-	slackDescriptionText = lipgloss.AdaptiveColor{Light: "#454447", Dark: "#b9b5b0"}
-	slackPlaceholderText = lipgloss.AdaptiveColor{Light: "#5e5d60", Dark: "#868380"}
-)
-
 // ThemeSlack returns a huh theme styled with Slack brand colors.
 func ThemeSlack() *huh.Theme {
 	t := huh.ThemeBase()

internal/style/colors.go

@@ -0,0 +1,45 @@
+// Copyright 2022-2026 Salesforce, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package style
+
+// Slack brand color palette.
+// Single source of truth for all styling: lipgloss, huh themes, and bubbletea components.
+//
+// Colors from https://a.slack-edge.com/4d5bb/marketing/img/media-kit/slack_brand_guidelines_september2020.pdf
+
+import "github.com/charmbracelet/lipgloss"
+
+// Brand colors
+var (
+	slackAubergine = lipgloss.Color("#7C2852")
+	slackBlue      = lipgloss.Color("#36c5f0")
+	slackGreen     = lipgloss.Color("#2eb67d")
+	slackYellow    = lipgloss.Color("#ecb22e")
+	slackRed       = lipgloss.Color("#e01e5a")
+	slackRedDark   = lipgloss.Color("#a01040")
+)
+
+// Supplementary colors
+var (
+	slackPool      = lipgloss.Color("#78d7dd")
+	slackLegalGray = lipgloss.Color("#5e5d60")
+)
+
+// Adaptive colors that adjust for light/dark terminal backgrounds
+var (
+	slackOptionText      = lipgloss.AdaptiveColor{Light: "#1d1c1d", Dark: "#f4ede4"}
+	slackDescriptionText = lipgloss.AdaptiveColor{Light: "#454447", Dark: "#b9b5b0"}
+	slackPlaceholderText = lipgloss.AdaptiveColor{Light: "#5e5d60", Dark: "#868380"}
+)