feat: integrate Pi backend and Pi Web

pi-web/lib/tool-presets.ts

@@ -0,0 +1,34 @@
+export interface ToolEntry {
+  name: string;
+  description: string;
+  active: boolean;
+}
+
+export type ToolPreset = "none" | "default" | "full";
+
+export const PRESET_NONE: string[] = [];
+export const PRESET_DEFAULT: string[] = ["read", "bash", "edit", "write"];
+export const PRESET_FULL: string[] = ["bash", "read", "edit", "write", "grep", "find", "ls"];
+
+const BUILTIN_TOOL_NAMES = new Set(PRESET_FULL);
+
+export function getPresetFromTools(tools: ToolEntry[]): ToolPreset {
+  const activeTools = tools.filter((t) => t.active);
+  if (activeTools.length === 0) return "none";
+
+  const active = activeTools
+    .map((t) => t.name)
+    .filter((name) => BUILTIN_TOOL_NAMES.has(name))
+    .sort()
+    .join(",");
+
+  if (active === [...PRESET_DEFAULT].sort().join(",")) return "default";
+  if (active === [...PRESET_FULL].sort().join(",")) return "full";
+  return "default";
+}
+
+export function getToolNamesForPreset(preset: ToolPreset): string[] {
+  if (preset === "none") return [...PRESET_NONE];
+  if (preset === "full") return [...PRESET_FULL];
+  return [...PRESET_DEFAULT];
+}