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2// Minimal multi-agent Val Town demo – no API keys required.
3
4import { fetch } from "https://esm.town/v/std/fetch";
5
6interface TaskInput<T> {
86      if (out1.error) throw new Error(out1.error);
87
88      // Agent 2: Fetch external data
89      const t2: TaskInput<{}> = { mandateId: this.mandateId, taskId: `T2-${Date.now()}`, payload: {} };
90      const out2 = await fetchAgent(t2, this.logFn);
91      if (out2.error) throw new Error(out2.error);
92
122}
123
124async function fetchAgent(task: TaskInput<{}>, log: LogFunction): Promise<TaskOutput<{ data: any }>> {
125  const { mandateId, taskId } = task;
126  log("INFO", "FetchAgent", `Start ${taskId}`);
127  try {
128    const resp = await fetch("https://jsonplaceholder.typicode.com/todos/1");
129    if (!resp.ok) throw new Error(`Bad status ${resp.status}`);
130    const data = await resp.json();
131    log("SUCCESS", "FetchAgent", `Done ${taskId}`, data);
132    return { mandateId, correlationId: taskId, payload: { data } };
133  } catch (e: any) {
134    log("ERROR", "FetchAgent", `Fail ${taskId}`, e);
135    return { mandateId, correlationId: taskId, payload: { data: null }, error: e.message };
136  }
168  const fd = new FormData(form);
169  const body = Object.fromEntries(fd.entries());
170  const res = await fetch(window.location.pathname, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) });
171  const data = await res.json();
172  if (!res.ok || data.error) {

43
44      // The URL is short—we need to get the final URL after redirect.
45      const res = await fetch(item["Letterboxd URI"]);
46      if (res.status !== 200) {
47        throw new Error("Unexpected status");

135  const lastSunday = today.startOf("week").minus({ days: 1 });
136
137  // Fetch relevant memories using the utility function
138  const memories = await getRelevantMemories();
139

67  const [currentPage, setCurrentPage] = useState(1);
68
69  const fetchMemories = useCallback(async () => {
70    setLoading(true);
71    setError(null);
72    try {
73      const response = await fetch(API_BASE);
74      if (!response.ok) {
75        throw new Error(`HTTP error! status: ${response.status}`);
78      setMemories(data);
79    } catch (e) {
80      console.error("Failed to fetch memories:", e);
81      setError(e.message || "Failed to fetch memories.");
82    } finally {
83      setLoading(false);
86
87  useEffect(() => {
88    fetchMemories();
89  }, [fetchMemories]);
90
91  const handleAddMemory = async (e: React.FormEvent) => {
100
101    try {
102      const response = await fetch(API_BASE, {
103        method: "POST",
104        headers: { "Content-Type": "application/json" },
112      setNewMemoryTags("");
113      setShowAddForm(false);
114      await fetchMemories();
115    } catch (e) {
116      console.error("Failed to add memory:", e);
123
124    try {
125      const response = await fetch(`${API_BASE}/${id}`, {
126        method: "DELETE",
127      });
129        throw new Error(`HTTP error! status: ${response.status}`);
130      }
131      await fetchMemories();
132    } catch (e) {
133      console.error("Failed to delete memory:", e);
155
156    try {
157      const response = await fetch(`${API_BASE}/${editingMemory.id}`, {
158        method: "PUT",
159        headers: { "Content-Type": "application/json" },
164      }
165      setEditingMemory(null);
166      await fetchMemories();
167    } catch (e) {
168      console.error("Failed to update memory:", e);

135  ));
136
137// HTTP vals expect an exported "fetch handler"
138export default app.fetch;

163```
164
1655. **fetchTranspiledJavaScript** - Fetch and transpile TypeScript to JavaScript:
166```ts
167const jsCode = await fetchTranspiledJavaScript("https://esm.town/v/username/project/path/to/file.ts");
168```
169
242
243    // Inject data to avoid extra round-trips
244    const initialData = await fetchInitialData();
245    const dataScript = `<script>
246      window.__INITIAL_DATA__ = ${JSON.stringify(initialData)};
300
3015. **API Design:**
302   - `fetch` handler is the entry point for HTTP vals
303   - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`
304   - Properly handle CORS if needed for external access

82  const [cookieAndTeaMode, setCookieAndTeaMode] = useState(false);
83
84  // Fetch images from backend instead of blob storage directly
85  useEffect(() => {
86    // Set default background color in case image doesn't load
89    }
90
91    // Fetch avatar image
92    fetch("/api/images/stevens.jpg")
93      .then((response) => {
94        if (response.ok) return response.blob();
103      });
104
105    // Fetch wood background
106    fetch("/api/images/wood.jpg")
107      .then((response) => {
108        if (response.ok) return response.blob();
129  }, []);
130
131  const fetchMemories = useCallback(async () => {
132    setLoading(true);
133    setError(null);
134    try {
135      const response = await fetch(API_BASE);
136      if (!response.ok) {
137        throw new Error(`HTTP error! status: ${response.status}`);
154      }
155    } catch (e) {
156      console.error("Failed to fetch memories:", e);
157      setError(e.message || "Failed to fetch memories.");
158    } finally {
159      setLoading(false);
162
163  useEffect(() => {
164    fetchMemories();
165  }, [fetchMemories]);
166
167  const handleAddMemory = async (e: React.FormEvent) => {
176
177    try {
178      const response = await fetch(API_BASE, {
179        method: "POST",
180        headers: { "Content-Type": "application/json" },
188      setNewMemoryTags("");
189      setShowAddForm(false);
190      await fetchMemories();
191    } catch (e) {
192      console.error("Failed to add memory:", e);
199
200    try {
201      const response = await fetch(`${API_BASE}/${id}`, {
202        method: "DELETE",
203      });
205        throw new Error(`HTTP error! status: ${response.status}`);
206      }
207      await fetchMemories();
208    } catch (e) {
209      console.error("Failed to delete memory:", e);
231
232    try {
233      const response = await fetch(`${API_BASE}/${editingMemory.id}`, {
234        method: "PUT",
235        headers: { "Content-Type": "application/json" },
240      }
241      setEditingMemory(null);
242      await fetchMemories();
243    } catch (e) {
244      console.error("Failed to update memory:", e);

55
56// Use this line if you want live-reload functionality
57// export default liveReload(app.fetch, import.meta.url);
58
59// If live-reload is causing issues, comment out the line above and uncomment this line instead:
60export default app.fetch;

12
13- `/push` will copy the contents from a list of vals specified in `config.json` and push them to a GitHub repo
14- `/deploy` is a GitHub webhook URL that will fetch contents from GitHub and update the code on Val Town
15
161. Fork this val
271. Add a `VAL_SECRET` env var to the val. Use this secret to sign the webhook POST request to the `/push` endpoint. Use this endpoint to commit vals from Val Town to your GitHub repo.
28
29### Example push to GitHub fetch
30
31You can use this example to POST to the `/push` endpoint to copy vals to GitHub.
46  const signature = await sign(body, secret);
47
48  const res = await fetch(url, {
49    method: "POST",
50    body,
89- [x] Monkey test
90- [x] Add setup instructions to readme
91- [x] Add example code for private webhook fetch
92- [x] Make val and repo public
93- [ ] Check modified date before export to GitHub??

22app.post("/deploy", verifyGitHubSignature(GITHUB_WEBHOOK_SECRET), deploy);
23
24export default app.fetch;