Find a model

\n One of the most common pieces of advice I give to mentees is to\n \"find a model.\" It's a stupid-simple technique, but can\n transform how you work. It will let you do things faster,\n better, and with more confidence. It's a mystery that everybody\n doesn't use it all the time.\n

\n The core of the technique is to find a model artifact to keep an\n eye on while you work on your artifact, which could be a coding\n project, a song, a painting, an email, a social media post, an\n essay like this one, etc.\n

\n The are three important benefits to this technique.\n

\n A north star\n

\n A model gives you a north star; something to shoot to; something\n you can visually compare your work to, and see what's missing; a\n yardstick by which you can measure how \"done\" your artifact is.\n Without a model, how do you even know what kind of thing you're\n making? How can you tell its shape? A model is like a\n hyper-specific template that lets you stay focused on the end\n goal.\n

\n There are many related principles:{\" \"}\n \n Backward Chaining\n ,{\" \"}\n \n Top-down design\n ,{\" \"}\n \n The XY Problem\n , and Amazon's principle to \"Write the Press Release\n First\". These all get at the idea that you don't want to lose\n sight of the end goal. Without a model, you risk getting lost in\n the details. Losing the forest for the trees. A model helps you\n keep the whole forest in sight, so you actually create what you\n set out to.\n

\n However, it's important to remember that \"Plans are useless, but\n planning is indispensable.\" In other words, you shouldn't feel\n compelled to stick to your model so closely. Use the parts that\n you want, and forget about the rest. A model is high up on{\" \"}\n The Ladder of Abstraction, but that doesn't\n mean you can't change it. If you realize that you chose the\n wrong model or that your goals have changed, excellent. Time to\n find a better model.\n

\n The fact that you have a model is what allows you to realize\n when you have the wrong model. Imagine you're a ship captain\n navigating by a star that you thought was the north star, but\n then later realized was just Venus. The time you wasted\n navigating by Venus would've been equally wasted if you were\n navigating without reference to any star. At least when you're\n navigating by Venus one of your fellow sailors can come over\n your shoulder and say, \"Hey captain, I think that's Venus.\" If\n you're navigating by nothing, then you're truly lost at sea.\n

\n Un-stuck-ing yourself\n

\n Another reason to have model is that it's very helpful when you\n get stuck. Don't know how to do something? See how your model\n does it.\n

\n For this essay I felt stuck on the first line. This essay's\n model is{\" \"}\n \n Do things that don't scale\n , because it's an essay that explains a cognitive\n technique. Its first sentence isn't the prettiest, but it gets\n the idea across and it's a hook: \"One of the most common types\n of advice we give at Y Combinator is to do things that don't\n scale.\"\n

\n Now go back and read my first line. Is it deritive? Yes. Would\n literally anyone have noticed if I didn't draw your attention to\n it? No. There's something profoundly true about the line\n oft-attributed to Picasso, \"Good artists borrow. Great artists\n steal.\" I didn't truly believe this quote until I read{\" \"}\n \n The Elements of Eloquence\n , wherein he shows examples of Shakespeare lifting whole\n sentences out of other books and plays, only changing a couple\n words.\n

\n In school, they call this behavior cheating, which is probably\n why this technique isn't practiced more often. I think it's an\n important lesson to unlearn. Why reinvent the wheel? Save time\n so you can focus on your unique contribution. Just be sure to\n give attribution and credit where it's due.\n

\n Maybe someone already did it, so you don't have to\n

\n How many times have you built something only later to realize\n someone else already built it? Chances are that if an idea\n occurs to you, likely it has occured to someone like you. So\n many people don't even take a second to google around before\n embarking on a project. Instead of wasting your time reinventing\n the wheel, see if someone already invented it. Then stop. Just\n use their thing.\n

\n How to find a model\n

\n One reason \"finding a model\" isn't more common is that it can be\n quite difficult to find a good model. I call that technique{\" \"}\n \"surveying the space\".\n

\n \n ,\n ),\n { headers: { \"Content-Type\": \"text/html\" } },\n );\n}",[],[101,194],{"_106":203,"_97":204,"_167":205,"_169":168,"_170":149,"_171":206,"_173":122,"_108":207,"_102":33,"_175":198,"_177":208,"_178":22,"_179":-5,"_180":209,"_100":210},"64821320-e75c-11f0-a1e3-42dde27851f2","proposal.tsx","648213c0-e75c-11f0-a1e3-42dde27851f2",60,["D",1767304445769],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { renderToString } from \"npm:react-dom@18.2.0/server\";\nimport { Link } from \"../helpers.tsx\";\n\nexport default async function(request: Request) {\n return new Response(\n renderToString(\n \n \n Steve Krouse\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n Steve Krouse\n

I proposed to my girlfriend in Quordle

\n Emily loves puzzles. Every day she plays Wordle, the New York Times Mini, Connections, Spelling Bee,\n LinkedIn Tango and Queens, and Quordle, in that order.\n

\n I thought it'd be fun to propose in one of her favorite games. It's appropriate, after all, because\n Wordle itself was created for love. But which game would work?\n

\n At the end of the day you have to say \"Will you marry me?\" so that ruled out many options. How can you\n fit that into Wordle or Connections? I tried my hand at a crossword, but damn those are hard!\n

\n Eventually I realized the question would fit inside Quordle, but with extra letters. For context,{\" \"}\n Quordle{\" \"}\n is four Wordles that you're playing at the same time. I'd deal with the extra letters by having them\n fall away at the end, leaving the big question. The first set of words I came up with were \"Willy\",\n \"Youth\", \"Marry\", and \"Meaty\", but I eventually changed \"Meaty\" to \"Meter\" because Emily loves\n {\" \"}\n when words end with \"er\".\n

\n Enter AI. I work at{\" \"}\n Val Town, and we make a website for programmers to build apps.{\" \"}\n Townie{\" \"}\n is our AI-assistant that writes Val Town apps for you. I started with a very simple prompt and a\n screenshot of Quordle.\n

\n On a cold December night at Betaworks in Chelsea, I cozied up and worked with Townie for 90 minutes. It\n was one of David Bieber's wonderful hack nights, so the atmosphere was perfect. By the end of the night,\n it was done. I remember it being a lot of fun.\n

\n Looking back at the chat history, I see that there are{\" \"}\n 91 versions, which means I was\n averaging about one edit per minute. It takes Townie, powered by Claude 3.5 Sonnet, about 30-60 seconds\n to rewrite a couple hundred lines of code, so that would account for the speed. I think most of those\n edits were through Townie, but I also made some manual edits to the code for smaller changes.\n

\n The basic mechanics of Quordle were more complicated than I'd realized. For example, the keys on the\n on-screen keyboard need to be colored appropriately, green, yellow, gray, and black, representing\n whether that letter is in the right spot, wrong spot, not in the word, or not played yet, respectively,\n and in four quadrants, for the four different Wordle boards on-screen. Also each of the attempts on each\n Wordle board needs to be colored appropriately, with subtle rules governing various end states.\n

\n But after I got the basic mechanics working, the game felt flat somehow. I pulled up the original and\n noticed all sorts of tiny micro interactions that gave the game life. When you press on a letter on the\n keyboard, it moves up and turns another color. When a letter shows up on the screen, it animates in.\n When you get a word correct, it animates in in a flipboard style.\n

\n I also wanted to copy how Quordle highlights invalid words in red, but for that I needed a list of valid\n words. It was suprisingly easy to find the list that Quordle itself was using. I popped open the Chrome\n Network tab, navigated to Quordle, and hit Cmd+F to get the Search across everything. There I just put a\n random word that I knew to be on the list, \"youth\", and voila. I found it interesting to see the lists,\n broken up into a `wordBank`, `blacklist`, and `allowed`. I went with the `allowed` list.\n

\n I later realized that the letters-falling-away animation at the end happened quite quickly, so I needed\n some way to slow it down, and get her attention. I could imagine her looking away right when she gets\n the last word, and she'd miss it. So I had Townie add a modal when she won, asking her if she's ready\n for the next level.\n

\n \n

\n \n \n

\n The morning I decided to do it, we first started with her normal word games. Then I announced that I\n made her a word game. She was excited. She enjoyed the Quordle, but was a bit confused why all the words\n were so random. The only one that had any significance was \"meter\", because it ended in \"er\", but even\n that significance was weak. Safe to say she had no clue what was coming. She got to the win screen and\n was ready for the next level. The letters fell away and she turned to me and said, \"What?\"\n

\n The rest happened in a blur, but I did get down on one knee and pull out a ring. She said yes.\n

\n \n

\n You can play Emirdle here\n . The next level is reserved for Emily.\n

\n \n ,\n ),\n { headers: { \"Content-Type\": \"text/html\" } },\n );\n}",[],[101,204],{"_106":212,"_97":213,"_167":214,"_169":168,"_170":149,"_171":215,"_173":122,"_108":216,"_102":33,"_175":198,"_177":217,"_178":22,"_179":-5,"_180":218,"_100":219},"647e880e-e75c-11f0-bbe1-42dde27851f2","survey.tsx","647e88ea-e75c-11f0-bbe1-42dde27851f2",59,["D",1767304445746],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { renderToString } from \"npm:react-dom@18.2.0/server\";\nimport { Link } from \"../helpers.tsx\";\n\nexport default async function(request: Request) {\n return new Response(\n renderToString(\n \n \n Steve Krouse\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n Steve Krouse\n

\n \n \n \"a person surveying a space\" by{\" \"}\n Fal Demo App\n \n

Survey the space

\n 🚧 This essay is under active development 🚧\n

• Describe precisely what you're doing

• Think of key words

• Think of words or phrases you'd be likely to use

• Think about where you'd post your thing. Think about where this crowd hangs out

• Google, perplexity, hn search, twitter, deep research

\n \n ,\n ),\n { headers: { \"Content-Type\": \"text/html\" } },\n );\n}",[],[101,213],[101],{"_106":222,"_97":223,"_167":224,"_169":-5,"_170":149,"_171":225,"_173":122,"_108":226,"_102":33,"_175":188,"_177":227,"_178":22,"_179":-5,"_180":228,"_100":229},"13d91ac6-e52d-11f0-af87-42dde27851f2",".vtignore","13d91b66-e52d-11f0-af87-42dde27851f2",24,["D",1767064221772],".git\n.vscode\n.cursorrules\n.DS_Store\nnode_modules\nvendor",[],[223],{"_106":231,"_97":232,"_167":233,"_169":-5,"_170":149,"_171":234,"_173":122,"_108":235,"_102":33,"_175":188,"_177":236,"_178":22,"_179":-5,"_180":237,"_100":238},"13e12202-e52d-11f0-8b9b-42dde27851f2","AGENTS.md","13e122c0-e52d-11f0-8b9b-42dde27851f2",26,["D",1767064221810],"You are an advanced assistant specialized in generating Val Town code.\n\n## Core Guidelines\n\n- Ask clarifying questions when requirements are ambiguous\n- Provide complete, functional solutions rather than skeleton implementations\n- Test your logic against edge cases before presenting the final solution\n- Ensure all code follows Val Town's specific platform requirements\n- If a section of code that you're working on is getting too complex, consider refactoring it into subcomponents\n\n## Code Standards\n\n- Generate code in TypeScript or TSX\n- Add appropriate TypeScript types and interfaces for all data structures\n- Prefer official SDKs or libraries than writing API calls directly\n- Ask the user to supply API or library documentation if you are at all unsure about it\n- **Never bake in secrets into the code** - always use environment variables\n- Include comments explaining complex logic (avoid commenting obvious operations)\n- Follow modern ES6+ conventions and functional programming practices if possible\n\n## Types of triggers\n\n### 1. HTTP Trigger\n\n- Create web APIs and endpoints\n- Handle HTTP requests and responses\n- Example structure:\n\n```ts\nexport default async function (req: Request) {\n return new Response(\"Hello World\");\n}\n```\n\nFiles that are HTTP triggers have http in their name like `foobar.http.tsx`\n\n### 2. Cron Triggers\n\n- Run on a schedule\n- Use cron expressions for timing\n- Example structure:\n\n```ts\nexport default async function () {\n // Scheduled task code\n}\n```\n\nFiles that are Cron triggers have cron in their name like `foobar.cron.tsx`\n\n### 3. Email Triggers\n\n- Process incoming emails\n- Handle email-based workflows\n- Example structure:\n\n```ts\nexport default async function (email: Email) {\n // Process email\n}\n```\n\nFiles that are Email triggers have email in their name like `foobar.email.tsx`\n\n\n## Val Town Standard Libraries\n\nVal Town provides several hosted services and utility functions.\n\n### Blob Storage\n\n```ts\nimport { blob } from \"https://esm.town/v/std/blob\";\nawait blob.setJSON(\"myKey\", { hello: \"world\" });\nlet blobDemo = await blob.getJSON(\"myKey\");\nlet appKeys = await blob.list(\"app_\");\nawait blob.delete(\"myKey\");\n```\n\n### SQLite\n\n```ts\nimport { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nconst TABLE_NAME = 'todo_app_users_2';\n// Create table - do this before usage and change table name when modifying schema\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS ${TABLE_NAME} (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n name TEXT NOT NULL\n)`);\n// Query data\nconst result = await sqlite.execute(`SELECT * FROM ${TABLE_NAME} WHERE id = ?`, [1]);\n```\n\nNote: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.\n\n### OpenAI\n\n```ts\nimport { OpenAI } from \"https://esm.town/v/std/openai\";\nconst openai = new OpenAI();\nconst completion = await openai.chat.completions.create({\n messages: [\n { role: \"user\", content: \"Say hello in a creative way\" },\n ],\n model: \"gpt-4o-mini\",\n max_tokens: 30,\n});\n```\n\n### Email\n\n```ts\nimport { email } from \"https://esm.town/v/std/email\";\n// By default emails the owner of the val\nawait email({ \n subject: \"Hi\", \n text: \"Hi\", \n html: \"

Hi

\"\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\" urls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's *extremely importing* to note that `parseProject` and other Standard Library utilities ONLY RUN ON THE SERVER.\nIf 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\nor by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})` instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use: `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified\n- **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\n- **Error Debugging:** Add `` to HTML to capture client-side errors\n- **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\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with `?deps=react@18.2.0,react-dom@18.2.0` and start the file with `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same version\n- **Styling:** Default to using TailwindCSS via `` unless otherwise specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project files:\n ```ts\n import { readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n \n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n \n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n \n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:** \n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`\n\n",[],[232],{"_106":240,"_97":184,"_167":241,"_169":-5,"_170":149,"_171":242,"_173":122,"_108":243,"_102":244,"_175":188,"_177":74,"_178":22,"_179":-5,"_180":245,"_100":246},"666331a2-de23-11f0-bb1e-42dde27851f2","019b3f1b-f949-7608-a498-551d2192a0cc",2,["D",1766290407140],1,[],[184],{"_106":248,"_97":249,"_167":250,"_169":-5,"_170":149,"_171":251,"_173":122,"_108":252,"_102":33,"_175":188,"_177":253,"_178":22,"_179":-5,"_180":254,"_100":255},"13dc482c-e52d-11f0-b343-42dde27851f2","deno.json","13dc48ea-e52d-11f0-b343-42dde27851f2",25,["D",1767064221779],"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/98f62cee78e85bfc47c62ed703777c6bc8794f1c/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": true,\n \"types\": [\"https://www.val.town/types/valtown.d.ts\"],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"include\": [\"deno:/https/esm.town/**/*\"],\n \"rules\": {\n \"exclude\": [\"no-explicit-any\"]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[249],{"_106":257,"_97":258,"_167":259,"_169":-5,"_170":149,"_171":244,"_173":122,"_108":260,"_102":33,"_175":198,"_177":261,"_178":22,"_179":-5,"_180":262,"_100":263},"483cc4e0-de23-11f0-816e-42dde27851f2","helpers.tsx","019b3f1b-f949-7608-a498-5e5f26ee6d4d",["D",1766290356487],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nconst linkClass = \"text-blue-500 hover:underline\";\nexport const Link = (\n { children, href }: {\n children?: React.ReactNode;\n href: string;\n },\n) => {children};",[],[258],{"_106":265,"_97":266,"_167":267,"_169":-5,"_170":149,"_171":268,"_173":22,"_108":269,"_102":270,"_175":198,"_177":271,"_178":22,"_179":-5,"_180":272,"_100":273},"a4ce7288-e75d-11f0-98d7-42dde27851f2","index.tsx","019b3f1b-f949-7608-a498-60d158246340",65,["D",1767304983136],49,"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { renderToString } from \"npm:react-dom@18.2.0/server\";\nimport { Link } from \"./helpers.tsx\";\n\n// San Francisco coordinates for the sky gradient\nconst SF_LAT = 37.7739043893829;\nconst SF_LON = -122.43962250314021;\n\n// Calculate perceived brightness of an RGB color (0 = black, 1 = white)\nfunction getLuminance(rgbString: string): number {\n const match = rgbString.match(/rgb\$(\\d+),\\s*(\\d+),\\s*(\\d+)\$/);\n if (!match) return 1; // default to bright if can't parse\n const [r, g, b] = [match[1], match[2], match[3]].map(Number);\n // Perceived brightness formula\n return (0.299 * r + 0.587 * g + 0.114 * b) / 255;\n}\n\n// Fetch sky gradient from horizon-val API\nasync function getSkyGradient(lat: number = SF_LAT, lon: number = SF_LON): Promise<{ gradient: string; topColor: string; bottomColor: string; isDark: boolean }> {\n try {\n const response = await fetch(\n `https://shapedlines--86fe5e54e42311f09c7342dde27851f2.web.val.run/api/gradient?lat=${lat}&lon=${lon}`\n );\n if (!response.ok) {\n console.log(\"Horizon API error:\", response.status, await response.text());\n throw new Error(`API returned ${response.status}`);\n }\n const data = await response.json();\n console.log(\"Horizon API response:\", JSON.stringify(data));\n const topLuminance = getLuminance(data.css.themeColor);\n const bottomLuminance = getLuminance(data.css.fallbackColor);\n return {\n gradient: data.css.background,\n topColor: data.css.themeColor,\n bottomColor: data.css.fallbackColor,\n isDark: topLuminance < 0.15 && bottomLuminance < 0.15,\n };\n } catch (e) {\n console.log(\"Failed to fetch from horizon API:\", e);\n // Fallback to a simple gradient\n return {\n gradient: \"linear-gradient(to bottom, rgb(135, 206, 235), rgb(255, 223, 186))\",\n topColor: \"rgb(135, 206, 235)\",\n bottomColor: \"rgb(255, 223, 186)\",\n isDark: false,\n };\n }\n}\n\n// Helper to generate a dynamic SVG favicon based on the sky colors\nfunction getFaviconSvg(topColor: string, bottomColor: string): string {\n const svg = ``;\n return `data:image/svg+xml;base64,${btoa(svg)}`;\n}\n\nconst dateClass = \"text-xs text-gray-400 font-mono mr-1 hidden sm:inline-block\";\n\nexport async function Homepage(req?: Request) {\n let lat = SF_LAT;\n let lon = SF_LON;\n let locName = \"San Francisco, CA\";\n\n // Parse location from cookie if present\n const cookie = req?.headers.get(\"cookie\");\n if (cookie) {\n const match = cookie.match(/horizon_location=([^;]+)/);\n if (match) {\n try {\n const loc = JSON.parse(decodeURIComponent(match[1]));\n lat = loc.lat;\n lon = loc.lon;\n locName = loc.name;\n } catch (e) {\n console.error(\"Failed to parse location cookie\", e);\n }\n }\n }\n\n const sky = await getSkyGradient(lat, lon);\n\n // Always fetch SF sky for the favicon, regardless of current location\n const sfSky = (lat === SF_LAT && lon === SF_LON) ? sky : await getSkyGradient(SF_LAT, SF_LON);\n const faviconUrl = getFaviconSvg(sfSky.topColor, sfSky.bottomColor);\n\n return new Response(\n renderToString(\n \n \n shapedlines\n \n \n \n \n

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