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20### 2. HTTP Vals
21
22- Create web APIs and endpoints
23- Handle HTTP requests and responses
24- Example structure:
66- Generate code in TypeScript
67- Add appropriate TypeScript types and interfaces for all data structures
68- Prefer official SDKs or libraries than writing API calls directly
69- Ask the user to supply API or library documentation if you are at all unsure about it
70- **Never bake in secrets into the code** - always use environment variables
71- Include comments explaining complex logic (avoid commenting obvious operations)
190- For AI-generated images, use: `https://maxm-imggenurl.web.val.run/the-description-of-your-image`
191- **Storage:** DO NOT use the Deno KV module for storage
192- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods
193- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified
194- **View Source:** Add a view source link with `import.meta.url.replace("esm.town", "val.town")` and include `target="_top"` attribute
195- **Error Debugging:** Add `<script src="https://esm.town/v/std/catch"></script>` to HTML to capture client-side errors
196- **Error Handling:** Only use try...catch when there's a clear local resolution; avoid catches that merely log or return 500s - let errors bubble up with full context
197- **Environment Variables:** Use `Deno.env.get('keyname')` and minimize their use - prefer APIs without keys
198- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser
199- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites
230
231### Backend (Hono) Best Practices
232- Hono is the recommended API framework (similar to Express, Flask, or Sinatra)
233- Main entry point should be `backend/index.ts`
234- **Static asset serving:** Use the utility functions to read and serve project files:
251  });
252  ```
253- Create RESTful API routes for CRUD operations
254- Be careful with error handling as Hono tends to swallow errors
255- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:
268- Use React 18.2.0 consistently in all imports and the `@jsxImportSource` pragma
269- Follow the React component pattern from the example project
270- Handle API calls properly with proper error catching
271
272### Database Patterns
299   - For files in the project, use `readFile` helpers
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`

10import { NotebookView } from "./NotebookView.tsx";
11
12const API_BASE = "/api/memories";
13const MEMORIES_PER_PAGE = 20; // Increased from 7 to 20 memories per page
14
90
91    // Fetch avatar image
92    fetch("/api/images/stevens.jpg")
93      .then((response) => {
94        if (response.ok) return response.blob();
104
105    // Fetch wood background
106    fetch("/api/images/wood.jpg")
107      .then((response) => {
108        if (response.ok) return response.blob();
133    setError(null);
134    try {
135      const response = await fetch(API_BASE);
136      if (!response.ok) {
137        throw new Error(`HTTP error! status: ${response.status}`);
176
177    try {
178      const response = await fetch(API_BASE, {
179        method: "POST",
180        headers: { "Content-Type": "application/json" },
199
200    try {
201      const response = await fetch(`${API_BASE}/${id}`, {
202        method: "DELETE",
203      });
231
232    try {
233      const response = await fetch(`${API_BASE}/${editingMemory.id}`, {
234        method: "PUT",
235        headers: { "Content-Type": "application/json" },
606    <div className="font-pixel text-[#f8f1e0]">
607      <style jsx>{`
608        @import url("https://fonts.googleapis.com/css2?family=Pixelify+Sans&display=swap");
609
610        @tailwind base;

2import { useAuth } from "./useAuth.tsx";
3
4const PROJECT_ENDPOINT = "/api/project";
5const FILES_ENDPOINT = "/api/project-files";
6
7export function useProject (projectId: string, branchId?: string) {

2import { useAuth } from "./useAuth.tsx";
3
4const ENDPOINT = "/api/projects-loader";
5
6export function useProjects () {

3import { useAuth } from "./useAuth.tsx";
4
5const ENDPOINT = "/api/create-project";
6
7export function useCreateProject () {

2import { useAuth } from "./useAuth.tsx";
3
4const ENDPOINT = "/api/create-branch";
5
6export function useCreateBranch (projectId: string) {

6  project: any;
7  branchId: string | undefined;
8  anthropicApiKey: string;
9  bearerToken: string;
10  selectedFiles: string[];
16  project,
17  branchId,
18  anthropicApiKey,
19  bearerToken,
20  selectedFiles,
37    status,
38  } = useChat({
39    api: "/api/send-message",
40    body: {
41      project,
42      branchId,
43      anthropicApiKey,
44      selectedFiles,
45      images: images

2import { useAuth } from "./useAuth.tsx";
3
4const ENDPOINT = "/api/project-branches";
5
6export function useBranches (projectId: string) {

3
4const TOKEN_KEY = "bearer";
5const ANTHROPIC_KEY = "anthropic_api_key";
6
7export function useAuth () {
8  const [token, setToken, removeToken] = useLocalStorage(TOKEN_KEY, "");
9  const [anthropicApiKey, setAnthropicApiKey, removeAnthropicApiKey] = useLocalStorage(ANTHROPIC_KEY, "");
10  const [error, setError] = useState(null);
11
12  const isAuthenticated = !!token && !!anthropicApiKey;
13
14  const authenticate = async (valTownAPIKey: string, anthropicKey: string) => {
15    // replace all this with oauth when it's ready
16    try {
17      const res = await fetch("/api/user", {
18        headers: {
19          "Authorization": "Bearer " + valTownAPIKey,
20        },
21      });
25        setError(data.error);
26        removeToken();
27        removeAnthropicApiKey();
28        return;
29      }
30      setError(null);
31      setToken(valTownAPIKey);
32      setAnthropicApiKey(anthropicKey);
33    } catch (e) {
34      console.error(e);
35      setError(e.error);
36      removeToken();
37      removeAnthropicApiKey();
38    }
39  }
41  const logOut = () => {
42    removeToken();
43    removeAnthropicApiKey();
44  }
45
50    logOut,
51    token,
52    anthropicApiKey,
53  };
54}

13- Generate code in TypeScript or TSX
14- Add appropriate TypeScript types and interfaces for all data structures
15- Prefer official SDKs or libraries than writing API calls directly
16- Ask the user to supply API or library documentation if you are at all unsure about it
17- **Never bake in secrets into the code** - always use environment variables
18- Include comments explaining complex logic (avoid commenting obvious operations)
23### 1. HTTP Trigger
24
25- Create web APIs and endpoints
26- Handle HTTP requests and responses
27- Example structure:
167However, it's *extremely importing* to note that `parseProject` and other Standard Library utilities ONLY RUN ON THE SERVER.
168If you need access to this data on the client, run it in the server and pass it to the client by splicing it into the HTML page
169or by making an API request for it.
170
171## Val Town Platform Specifics
175- **AI Image:** To inline generate an AI image use: `<img src="https://maxm-imggenurl.web.val.run/the-description-of-your-image" />`
176- **Storage:** DO NOT use the Deno KV module for storage
177- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods
178- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified
179- **View Source:** Add a view source link by importing & using `import.meta.url.replace("ems.sh", "val.town)"` (or passing this data to the client) and include `target="_top"` attribute
180- **Error Debugging:** Add `<script src="https://esm.town/v/std/catch"></script>` to HTML to capture client-side errors
181- **Error Handling:** Only use try...catch when there's a clear local resolution; Avoid catches that merely log or return 500s. Let errors bubble up with full context
182- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys
183- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser
184- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites
218### Backend (Hono) Best Practices
219
220- Hono is the recommended API framework
221- Main entry point should be `backend/index.ts`
222- **Static asset serving:** Use the utility functions to read and serve project files:
242  });
243  ```
244- Create RESTful API routes for CRUD operations
245- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:
246  ```ts
279   - For files in the project, use `readFile` helpers
280
2815. **API Design:**
282   - `fetch` handler is the entry point for HTTP vals
283   - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`