Extract shared TUI indicator logic into reusable tui.ts module

Author: ofriw

tui.ts

@@ -0,0 +1,57 @@
+/**
+ * Shared TUI indicator updates for the agenticoding extension.
+ *
+ * Extracted from index.ts so that tool execute handlers can push live
+ * updates to the TUI during tool execution — not just at turn boundaries.
+ */
+
+import type { ExtensionContext } from "@earendil-works/pi-coding-agent";
+import type { AgenticodingState } from "./state.js";
+
+// ── TUI status / widget keys ─────────────────────────────────────────
+
+/** Status bar key for the handoff-in-progress indicator. */
+export const STATUS_KEY_HANDOFF = "agenticoding-handoff";
+
+/** Widget key for the high-context warning banner above the editor. */
+export const WIDGET_KEY_WARNING = "agenticoding-warning";
+
+/** Status bar key for context usage percentage. */
+export const STATUS_KEY_CTX = "agenticoding-ctx";
+
+/** Status bar key for ledger entry count. */
+export const STATUS_KEY_LEDGER = "agenticoding-ledger";
+
+/** Update TUI indicators: context usage, ledger count, warning widget. */
+export function updateIndicators(ctx: ExtensionContext, state: AgenticodingState): void {
+	if (!ctx.hasUI) return;
+
+	const theme = ctx.ui.theme;
+
+	// Context usage
+	const usage = ctx.getContextUsage();
+	if (usage && usage.percent !== null) {
+		const pct = Math.round(usage.percent);
+		const tone = pct >= 70 ? "error" : pct >= 50 ? "warning" : pct >= 30 ? "accent" : "dim";
+		ctx.ui.setStatus(STATUS_KEY_CTX, theme.fg("dim", "ctx ") + theme.fg(tone, `${pct}%`));
+	} else {
+		ctx.ui.setStatus(STATUS_KEY_CTX, theme.fg("dim", "ctx --%"));
+	}
+
+	// Ledger count — show 📒 0 in dim tone when empty so the feature is discoverable
+	const count = state.ledger.size;
+	ctx.ui.setStatus(STATUS_KEY_LEDGER, count > 0
+		? `\u{1F4D2} ${count}`
+		: theme.fg("dim", "\u{1F4D2} 0"),
+	);
+
+	// High-context warning widget (above editor)
+	if (usage && usage.percent !== null && usage.percent >= 70) {
+		ctx.ui.setWidget(WIDGET_KEY_WARNING, [
+			theme.fg("error", "\u26A0 ") +
+				theme.fg("warning", `Context at ${Math.round(usage.percent)}% — consider handoff`),
+		]);
+	} else {
+		ctx.ui.setWidget(WIDGET_KEY_WARNING, undefined);
+	}
+}