refactor(cli): move the custom status-line command into its own file

chat_tui.go crossed its repolint file-size budget once #11114 and #11062
landed together. The status-line command runner is self-contained, so it
moves verbatim to chat_tui_statusline.go; no behaviour changes.

The freed budget is reclaimed for chat_tui.go only (file-size 4112 -> 4067,
function-size 1056 -> 1030, complexity 274 -> 271, essay 77 -> 75) and the
repo-wide limits drop by the same amounts.

internal/cli/chat_tui.go

@@ -2,7 +2,6 @@ package cli
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
@@ -30,7 +29,6 @@ import (
 	"reasonix/internal/control"
 	"reasonix/internal/event"
 	"reasonix/internal/gitcmd"
-	"reasonix/internal/hook"
 	"reasonix/internal/i18n"
 	"reasonix/internal/memory"
 	"reasonix/internal/migration"
@@ -539,63 +537,10 @@ type elapsedTickMsg struct{ generation uint64 }
 // formatted readout ("" when none/failed).
 type balanceMsg struct{ text string }
 
-// statuslineMsg carries the latest custom status-line output (one line, ""
-// when none/failed).
-type statuslineMsg struct{ out string }
-
 // gitStatusMsg carries the latest lightweight git readout for the built-in
 // status line. Empty means "not a git worktree" or "git unavailable".
 type gitStatusMsg struct{ status gitStatus }
 
-// runStatusline runs the user's custom status-line command off the event loop,
-// feeding it a small JSON context on stdin and returning its first stdout line.
-// A no-op (nil) when no command is configured. Tight timeout so a slow script
-// can't stall the UI; failures collapse to an empty line rather than an error.
-func (m chatTUI) runStatusline() tea.Cmd {
-	cmd := m.statuslineCmd
-	if cmd == "" {
-		return nil
-	}
-	used, window := m.ctrl.ContextSnapshot()
-	cwd, _ := os.Getwd()
-	payload, _ := json.Marshal(map[string]any{
-		"model":         m.label,
-		"contextUsed":   used,
-		"contextWindow": window,
-		"cwd":           cwd,
-	})
-	return func() tea.Msg { return statuslineMsg{out: runStatuslineCmd(cmd, string(payload))} }
-}
-
-const statuslineCommandTimeout = 2 * time.Second
-
-// runStatuslineCmd runs a status-line command with the JSON context on stdin and
-// returns its first stdout line (status lines are a single row). A tight timeout
-// keeps a slow script from stalling the UI; any failure collapses to "".
-func runStatuslineCmd(cmd, stdinPayload string) string {
-	return runStatuslineCmdWithTimeout(cmd, stdinPayload, statuslineCommandTimeout)
-}
-
-func runStatuslineCmdWithTimeout(cmd, stdinPayload string, timeout time.Duration) string {
-	return runStatuslineCmdWith(hook.DefaultSpawner, cmd, stdinPayload, timeout)
-}
-
-// runStatuslineCmdWith spawns from the workspace, which the user does not
-// author, so a bare command name resolves through PATH alone.
-func runStatuslineCmdWith(spawn hook.Spawner, cmd, stdinPayload string, timeout time.Duration) string {
-	res := spawn(context.Background(), hook.SpawnInput{
-		Command: cmd,
-		Stdin:   stdinPayload + "\n",
-		Env:     map[string]string{hook.NoCwdCommandSearchEnv: "1"},
-		Timeout: timeout,
-	})
-	out := strings.TrimSpace(res.Stdout)
-	if i := strings.IndexByte(out, '\n'); i >= 0 {
-		out = strings.TrimSpace(out[:i])
-	}
-	return out
-}
-
 func (m chatTUI) refreshGitStatus() tea.Cmd {
 	if m.statuslineCmd != "" {
 		return nil

internal/cli/chat_tui_statusline.go

@@ -0,0 +1,66 @@
+package cli
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"strings"
+	"time"
+
+	tea "charm.land/bubbletea/v2"
+
+	"reasonix/internal/hook"
+)
+
+// statuslineMsg carries the latest custom status-line output (one line, ""
+// when none/failed).
+type statuslineMsg struct{ out string }
+
+// runStatusline runs the user's custom status-line command off the event loop,
+// feeding it a small JSON context on stdin and returning its first stdout line.
+// A no-op (nil) when no command is configured. Tight timeout so a slow script
+// can't stall the UI; failures collapse to an empty line rather than an error.
+func (m chatTUI) runStatusline() tea.Cmd {
+	cmd := m.statuslineCmd
+	if cmd == "" {
+		return nil
+	}
+	used, window := m.ctrl.ContextSnapshot()
+	cwd, _ := os.Getwd()
+	payload, _ := json.Marshal(map[string]any{
+		"model":         m.label,
+		"contextUsed":   used,
+		"contextWindow": window,
+		"cwd":           cwd,
+	})
+	return func() tea.Msg { return statuslineMsg{out: runStatuslineCmd(cmd, string(payload))} }
+}
+
+const statuslineCommandTimeout = 2 * time.Second
+
+// runStatuslineCmd runs a status-line command with the JSON context on stdin and
+// returns its first stdout line (status lines are a single row). A tight timeout
+// keeps a slow script from stalling the UI; any failure collapses to "".
+func runStatuslineCmd(cmd, stdinPayload string) string {
+	return runStatuslineCmdWithTimeout(cmd, stdinPayload, statuslineCommandTimeout)
+}
+
+func runStatuslineCmdWithTimeout(cmd, stdinPayload string, timeout time.Duration) string {
+	return runStatuslineCmdWith(hook.DefaultSpawner, cmd, stdinPayload, timeout)
+}
+
+// runStatuslineCmdWith spawns from the workspace, which the user does not
+// author, so a bare command name resolves through PATH alone.
+func runStatuslineCmdWith(spawn hook.Spawner, cmd, stdinPayload string, timeout time.Duration) string {
+	res := spawn(context.Background(), hook.SpawnInput{
+		Command: cmd,
+		Stdin:   stdinPayload + "\n",
+		Env:     map[string]string{hook.NoCwdCommandSearchEnv: "1"},
+		Timeout: timeout,
+	})
+	out := strings.TrimSpace(res.Stdout)
+	if i := strings.IndexByte(out, '\n'); i >= 0 {
+		out = strings.TrimSpace(out[:i])
+	}
+	return out
+}

tools/repolint/baseline.json

@@ -2,10 +2,10 @@
   "limits": {
     "banner": 13,
     "commented-code": 0,
-    "complexity": 1878,
-    "essay": 1915,
-    "file-size": 100466,
-    "function-size": 8031,
+    "complexity": 1875,
+    "essay": 1913,
+    "file-size": 100421,
+    "function-size": 8005,
     "layering": 1,
     "marker": 0,
     "narrative": 63,
@@ -661,10 +661,10 @@
       "essay": 6
     },
     "internal/cli/chat_tui.go": {
-      "complexity": 274,
-      "essay": 77,
-      "file-size": 4112,
-      "function-size": 1056
+      "complexity": 271,
+      "essay": 75,
+      "file-size": 4067,
+      "function-size": 1030
     },
     "internal/cli/chat_tui_paste.go": {
       "essay": 6,