Add repo settings API integration and move workflows into action

- Add getRepoSettings utility to fetch repo settings from Pullfrog API
- Integrate repo settings fetch in main.ts with agent validation
- Move workflows from lib/workflows.ts into action/workflows.ts
- Update workflow prompts to include comment management steps
- Add 'Prompt' workflow as fallback for general tasks
- Fix null check for response.body in claude agent tarball download
- Remove unused message handlers (tool_progress, auth_status)
- Fix tsconfig.json indentation consistency

utils/api.ts

@@ -0,0 +1,61 @@
+import type { RepoContext } from "./github.ts";
+
+export interface RepoSettings {
+  defaultAgent: string | null;
+  webAccessLevel: "full_access" | "limited";
+  webAccessAllowTrusted: boolean;
+  webAccessDomains: string;
+  workflows: Array<{
+    id: string;
+    name: string;
+    description: string;
+    prompt: string;
+  }>;
+}
+
+const DEFAULT_REPO_SETTINGS: RepoSettings = {
+  defaultAgent: null,
+  webAccessLevel: "full_access",
+  webAccessAllowTrusted: false,
+  webAccessDomains: "",
+  workflows: [],
+};
+
+/**
+ * Fetch repository settings from the Pullfrog API with fallback to defaults
+ * Returns agent, permissions, and workflows (excludes triggers)
+ * Returns null if repo doesn't exist, defaults if fetch fails
+ */
+export async function getRepoSettings(
+  token: string,
+  repoContext: RepoContext
+): Promise<RepoSettings> {
+  const apiUrl = process.env.API_URL || "https://pullfrog.ai";
+
+  const response = await fetch(
+    `${apiUrl}/api/repo/${repoContext.owner}/${repoContext.name}/settings`,
+    {
+      method: "GET",
+      headers: {
+        Authorization: `Bearer ${token}`,
+        "Content-Type": "application/json",
+      },
+    }
+  );
+
+  if (!response.ok) {
+    const errorText = await response.text();
+    throw new Error(
+      `Failed to fetch repo settings: ${response.status} ${response.statusText} - ${errorText}`
+    );
+  }
+
+  const settings = (await response.json()) as RepoSettings | null;
+
+  // If API returns null (repo doesn't exist), return defaults
+  if (settings === null) {
+    return DEFAULT_REPO_SETTINGS;
+  }
+
+  return settings;
+}