1 files changed, 75 insertions, 13 deletions
diff --git a/internal/tmux/status.go b/internal/tmux/status.go
index 4e1f9e4..1d2a8ee 100644
--- a/internal/tmux/status.go
+++ b/internal/tmux/status.go
@@ -1,28 +1,90 @@
 package tmux
 
 import (
-    "os"
-    "os/exec"
-    "strings"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"codeberg.org/snonux/hexai/internal/textutil"
 )
 
 // Enabled reports whether tmux status updates are enabled via env (default: on).
 func Enabled() bool {
-    v := strings.TrimSpace(os.Getenv("HEXAI_TMUX_STATUS"))
-    if v == "" { return true }
-    v = strings.ToLower(v)
-    return v == "1" || v == "true" || v == "yes" || v == "on"
+	v := strings.TrimSpace(os.Getenv("HEXAI_TMUX_STATUS"))
+	if v == "" {
+		return true
+	}
+	v = strings.ToLower(v)
+	return v == "1" || v == "true" || v == "yes" || v == "on"
 }
 
 // SetUserOption sets a global tmux user option like @hexai_status to value.
 func SetUserOption(key, value string) error {
-    if !Enabled() || !HasBinary() || !InSession() { return nil }
-    k := strings.TrimPrefix(strings.TrimSpace(key), "@")
-    if k == "" { return nil }
-    // Use set-option -g so it appears for all windows
-    return exec.Command("tmux", "set-option", "-g", "@"+k, value).Run()
+	if !Enabled() || !HasBinary() || !InSession() {
+		return nil
+	}
+	k := strings.TrimPrefix(strings.TrimSpace(key), "@")
+	if k == "" {
+		return nil
+	}
+	// Use set-option -g so it appears for all windows
+	return exec.Command("tmux", "set-option", "-g", "@"+k, value).Run()
 }
 
 // SetStatus is a convenience for setting @hexai_status.
-func SetStatus(value string) error { return SetUserOption("hexai_status", value) }
+func SetStatus(value string) error { return SetUserOption("hexai_status", applyTheme(value)) }
+
+// FormatLLMStatsStatus builds a compact tmux status string for LLM heartbeats.
+// Example: "LLM:gpt-4.1 5r 0.8rpm in12k out34k"
+func FormatLLMStatsStatus(model string, reqs int64, rpm float64, inBytes, outBytes int64) string {
+	return fmt.Sprintf("LLM:%s %dr %.1frpm in%s out%s", model, reqs, rpm, textutil.HumanBytes(inBytes), textutil.HumanBytes(outBytes))
+}
+
+// FormatLLMStatsStatusColored is like FormatLLMStatsStatus but includes provider and
+// tmux color segments for readability. Uses up/down arrows for bytes.
+// Example (with colors): "LLM:openai:gpt-4.1 ↑12k ↓34k 0.8rpm 5r"
+func FormatLLMStatsStatusColored(provider, model string, reqs int64, rpm float64, inBytes, outBytes int64) string {
+	in := textutil.HumanBytes(inBytes)
+	out := textutil.HumanBytes(outBytes)
+	// Keep it compact; colorize prefix and arrows; use fg resets so a themed bg can persist.
+	// colour8 = dim grey, colour3 = yellow (up), colour2 = green (down)
+	return fmt.Sprintf(
+		"#[fg=colour8]LLM:#[fg=default]%s:%s #[fg=colour3]↑%s#[fg=default] #[fg=colour2]↓%s#[fg=default] %.1frpm %dr",
+		provider, model, in, out, rpm, reqs,
+	)
+}
+
+// FormatLLMStartStatus renders a short colored heartbeat at start/initialize time.
+// Example: "LLM:openai:gpt-4.1 ⏳"
+func FormatLLMStartStatus(provider, model string) string {
+	return fmt.Sprintf("#[fg=colour8]LLM:#[fg=default]%s:%s #[fg=colour11]⏳#[fg=default]", provider, model)
+}
 
+// applyTheme wraps the status string with a user-selected tmux style if requested.
+// Set HEXAI_TMUX_STATUS_THEME=white-on-purple to get white-on-purple background.
+func applyTheme(s string) string {
+	theme := strings.ToLower(strings.TrimSpace(os.Getenv("HEXAI_TMUX_STATUS_THEME")))
+	// Allow explicit fg/bg override
+	fg := strings.TrimSpace(os.Getenv("HEXAI_TMUX_STATUS_FG"))
+	bg := strings.TrimSpace(os.Getenv("HEXAI_TMUX_STATUS_BG"))
+	if fg != "" || bg != "" {
+		if fg == "" {
+			fg = "default"
+		}
+		if bg == "" {
+			bg = "default"
+		}
+		return "#[fg=" + fg + ",bg=" + bg + "]" + s + "#[fg=default,bg=default]"
+	}
+	if theme == "white-on-purple" || theme == "purple" || theme == "magenta" || theme == "white-on-magenta" {
+		return "#[fg=white,bg=magenta]" + s + "#[fg=default,bg=default]"
+	}
+	if theme == "black-on-yellow" || theme == "yellow" || theme == "black-on-gold" {
+		return "#[fg=black,bg=yellow]" + s + "#[fg=default,bg=default]"
+	}
+	if theme == "white-on-blue" || theme == "blue" || theme == "white-on-navy" {
+		return "#[fg=white,bg=blue]" + s + "#[fg=default,bg=default]"
+	}
+	return s
+}