\n );\n }\n\n return (\n

\n {/* Header */}\n

🎯 Value Sort

\n Prioritize what matters using pairwise comparison and budget\n allocation\n

\n {mode.toString()}\n {mode === \"home\" && (\n \n 📊 Sessions\n \n )}\n {mode !== \"home\" && (\n \n ← Back\n \n )}\n

\n\n {/* Main Content - replace with mode-conditional UI */}\n

\n {mode === \"edit\" && activeList\n ? (\n

\n Editing:{\" \"}\n {activeList.title}\n

\n startPairwise(activeList)}\n className=\"text-sm px-3 py-1 border rounded-md bg-blue-50 hover:bg-blue-100 text-blue-700\"\n disabled={currentItems.length < 2}\n >\n 📊 Compare Items\n \n

\n\n {/* Add Item Form */}\n

\n Add New Item\n

\n\n {/* Items List */}\n

\n Items ({currentItems.length})\n

\n {currentItems.length === 0\n ? (\n

📝

No items yet. Add some items to get started!

\n )\n : (\n

\n {currentItems.map((item, index) => (\n \n

\n {item.label}\n

\n Added{\" \"}\n {new Date(item.createdAt).toLocaleDateString()}\n

\n #{index + 1}\n

\n ))}\n

\n )}\n

\n\n {currentItems.length >= 2 && (\n

✨

\n Ready to compare!\n

\n You have {currentItems.length}{\" \"}\n items. Click \"Compare Items\" to start prioritizing.\n

\n )}\n

\n )\n : mode === \"pairwise\" && activeList\n ? (\n

\n Comparing:{\" \"}\n {activeList.title}\n

\n {pairLoading ? \"Loading…\" : \"Pick the one you prefer\"}\n

\n\n {pair\n ? (\n

\n vote(pair.left.id)}\n className={`p-6 rounded-xl shadow border hover:shadow-md transition text-left bg-white hover:bg-blue-50 ${\n pairLoading ? \"opacity-50 cursor-not-allowed\" : \"\"\n }`}\n >\n

\n {pair.left.label}\n

\n \n vote(pair.right.id)}\n className={`p-6 rounded-xl shadow border hover:shadow-md transition text-left bg-white hover:bg-green-50 ${\n pairLoading ? \"opacity-50 cursor-not-allowed\" : \"\"\n }`}\n >\n

\n {pair.right.label}\n

\n \n

\n )\n : (\n

\n {pairLoading\n ? \"Finding the next pair…\"\n : \"No pair available\"}\n

\n )}\n

\n )\n : mode === \"ranking\" && activeList\n ? (\n

\n Ranking:{\" \"}\n {activeList.title}\n

\n startPairwise(activeList)}\n className=\"text-sm px-3 py-1 border rounded-md bg-gray-50 hover:bg-gray-100\"\n >\n Compare Again\n \n

\n\n {!ranking || ranking.rows.length === 0\n ? (\n

\n {itemsById && Object.keys(itemsById).length < 2\n ? \"Add at least two items to compare.\"\n : \"No ranking yet. Try a few comparisons!\"}\n

\n )\n : (\n

\n
\n
\n {idx + 1}. {label}\n
\n
{pct}%
\n
\n
\n \n
\n

\n \n );\n })}\n \n )}\n \n )\n : mode === \"sessions\"\n ? (\n

Your Sessions

\n {sessions.length} total sessions\n

\n\n {sessionsLoading\n ? (\n

\n Loading sessions...\n

\n )\n : sessions.length === 0\n ? (\n

📈

\n No sessions yet\n

\n Start comparing items in your lists to see session history\n here.\n

\n )\n : (\n

\n {sessions.map((session) => (\n {\n // TODO: Navigate to session details in future\n console.log(\"Session clicked:\", session.id);\n }}\n >\n

\n {session.type === \"pairwise\" ? \"⚖️\" : \"💰\"}\n

\n {session.listTitle}\n

\n {session.type === \"pairwise\"\n ? \"Pairwise Comparison\"\n : \"Budget Allocation\"}\n

\n {new Date(session.createdAt).toLocaleDateString()}\n

\n {new Date(session.createdAt).toLocaleTimeString()}\n

\n\n

\n {session.type === \"pairwise\" && (\n \n {session.voteCount} votes • {session.strategy}\n {\" \"}\n strategy\n \n )}\n {session.type === \"budget\" && (\n \n Budget: {session.budget} points\n \n )}\n

\n {session.completedAt\n ? (\n \n Completed\n \n )\n : (\n \n In Progress\n \n )}\n

\n ))}\n

\n )}\n \n )\n : (\n <>\n {/* Quick Actions */}\n

\n {/* Create New List */}\n

\n Create New List\n

\n\n {/* Sessions */}\n

\n Session History\n

\n View your past comparison and budget allocation sessions.\n

\n \n 📊 View Sessions\n \n

\n\n {/* Lists Grid */}\n

\n {lists.length === 0\n ? (\n

📝

\n No lists yet\n

\n Create your first list to start prioritizing!\n

\n )\n : (\n lists.map((list) => (\n {\n // Navigate to edit mode for the list\n openEditMode(list);\n }}\n >\n

\n {list.title}\n

\n {list.description && (\n

\n {list.description}\n

\n )}\n

\n \n Created{\" \"}\n {new Date(list.createdAt).toLocaleDateString()}\n \n

\n {/* Make Compare a button for quick start */}\n {\n e.stopPropagation();\n startPairwise(list);\n }}\n >\n 📊 Compare\n \n {\n e.stopPropagation();\n openEditMode(list);\n }}\n >\n ✏️ Edit\n \n \n 💰 Budget\n \n

\n ))\n )}\n \n\n {/* Features Overview */}\n

\n How It Works\n

⚖️

\n Pairwise Comparison\n

\n Compare items two at a time to build a ranking based on\n your preferences. Perfect for subjective decisions.\n

💰

\n Budget Allocation\n

\n Distribute a fixed budget across your items to understand\n relative importance and trade-offs.\n

\n \n )}\n \n\n {/* Footer */}\n \n \n );\n}\n\n",[],[238,244,250],[238,244],{"_103":259,"_95":260,"_155":261,"_157":239,"_158":137,"_159":208,"_161":162,"_105":262,"_99":32,"_164":182,"_166":263,"_167":22,"_168":-5,"_169":264,"_98":265},"777a1bd0-8893-11f0-9e43-0224a6c84d84","index.html","777a1c70-8893-11f0-9e43-0224a6c84d84",["D",1756882739431],"\n\n\n \n \n Value Sort - Prioritize What Matters\n \n \n\n\n

\n \n\n",[],[238,260],{"_103":267,"_95":268,"_155":269,"_157":239,"_158":137,"_159":270,"_161":162,"_105":271,"_99":160,"_164":209,"_166":272,"_167":22,"_168":-5,"_169":273,"_98":274},"e69878d6-8893-11f0-87ae-0224a6c84d84","index.tsx","7776313c-8893-11f0-b679-0224a6c84d84",16,["D",1756882925867],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { createRoot } from \"https://esm.sh/react-dom@18.2.0/client\";\n\nimport App from \"./components/App.tsx\";\n\nconst root = createRoot(document.getElementById(\"root\"));\nroot.render();\n\n",[],[238,268],[238],{"_103":277,"_95":278,"_155":279,"_157":-5,"_158":137,"_159":280,"_161":162,"_105":281,"_99":32,"_164":165,"_166":-5,"_167":22,"_168":-5,"_169":282,"_98":291},"772d9210-8893-11f0-a1ee-0224a6c84d84","shared","772d92b0-8893-11f0-a1ee-0224a6c84d84",4,["D",1756882738945],[283],{"_103":284,"_95":285,"_155":286,"_157":279,"_158":137,"_159":100,"_161":162,"_105":287,"_99":280,"_164":209,"_166":288,"_167":22,"_168":-5,"_169":289,"_98":290},"38eaaf5a-889e-11f0-8a4c-0224a6c84d84","types.ts","77916736-8893-11f0-b679-0224a6c84d84",["D",1756887358870],"import * as z from \"https://esm.sh/zod@3\";\n\n/** Core models */\n\nexport const Id = z.string().uuid().brand<\"Id\">();\n\nexport const Item = z.object({\n id: Id,\n listId: Id,\n label: z.string().min(1).max(200),\n meta: z.record(z.any(), z.any()).default({}),\n createdAt: z.string().datetime(),\n updatedAt: z.string().datetime(),\n});\nexport type Item = z.infer;\n\nexport const List = z.object({\n id: Id,\n ownerId: z.string(), // your auth/user id strategy\n title: z.string().min(1).max(200),\n description: z.string().max(1000).optional(),\n createdAt: z.string().datetime(),\n updatedAt: z.string().datetime(),\n});\nexport type List = z.infer;\n\n/** Pairwise comparison */\n\nexport const PairwiseSession = z.object({\n id: Id,\n listId: Id,\n userId: z.string(),\n strategy: z.enum([\"random\", \"balanced\"]), // how pairs are served\n createdAt: z.string().datetime(),\n closedAt: z.string().datetime().nullable(),\n});\nexport type PairwiseSession = z.infer;\n\nexport const PairwiseVote = z.object({\n id: Id,\n sessionId: Id,\n listId: Id,\n leftItemId: Id,\n rightItemId: Id,\n winnerItemId: Id, // = left or right\n createdAt: z.string().datetime(),\n});\nexport type PairwiseVote = z.infer;\n\n/** Budget allocation */\n\nexport const BudgetSession = z.object({\n id: Id,\n listId: Id,\n userId: z.string(),\n budget: z.number().positive().finite(), // e.g., 100 points\n createdAt: z.string().datetime(),\n submittedAt: z.string().datetime().nullable(),\n});\nexport type BudgetSession = z.infer;\n\nexport const BudgetAllocation = z.object({\n id: Id,\n sessionId: Id,\n listId: Id,\n itemId: Id,\n amount: z.number().min(0).finite(),\n createdAt: z.string().datetime(),\n});\nexport type BudgetAllocation = z.infer;\n\n/** Derived ranking */\n\nexport const RankingRow = z.object({\n itemId: Id,\n score: z.number(), // higher = better\n method: z.enum([\"pairwise\", \"budget\", \"hybrid\"]),\n});\nexport type RankingRow = z.infer;\n\n/** Requests */\n\nexport const CreateListReq = z.object({\n title: z.string().min(1),\n description: z.string().optional(),\n});\nexport const CreateItemReq = z.object({\n listId: Id,\n label: z.string().min(1),\n meta: z.record(z.any(), z.any()).optional(),\n});\n\nexport const StartPairwiseReq = z.object({\n listId: Id,\n strategy: z.enum([\"random\", \"balanced\"]).default(\"balanced\"),\n});\nexport const SubmitPairwiseVoteReq = z.object({\n sessionId: Id,\n leftItemId: Id,\n rightItemId: Id,\n winnerItemId: Id,\n});\n\nexport const StartBudgetReq = z.object({\n listId: Id,\n budget: z.number().positive(),\n});\nexport const SubmitBudgetReq = z.object({\n sessionId: Id,\n allocations: z.array(\n z.object({ itemId: Id, amount: z.number().min(0) }),\n ).min(1),\n});\n\n/** Responses */\n\nexport const PairToCompare = z.object({\n sessionId: Id,\n left: Item,\n right: Item,\n});\nexport type PairToCompare = z.infer;\n\nexport const BudgetEnvelope = z.object({\n sessionId: Id,\n budget: z.number(),\n items: z.array(Item),\n // optional server-side prefill\n current: z.array(z.object({ itemId: Id, amount: z.number().min(0) })).default(\n [],\n ),\n});\n\nexport const RankingRes = z.object({\n listId: Id,\n rows: z.array(RankingRow),\n});\nexport type RankingRes = z.infer;\n\n/** Session history */\n\nexport const SessionSummary = z.union([\n z.object({\n id: Id,\n type: z.literal(\"pairwise\"),\n listId: Id,\n listTitle: z.string(),\n createdAt: z.string().datetime(),\n completedAt: z.string().datetime().nullable(),\n voteCount: z.number(),\n strategy: z.string(),\n }),\n z.object({\n id: Id,\n type: z.literal(\"budget\"),\n listId: Id,\n listTitle: z.string(),\n createdAt: z.string().datetime(),\n completedAt: z.string().datetime().nullable(),\n budget: z.number(),\n }),\n]);\nexport type SessionSummary = z.infer;\n",[],[278,285],[278],{"_103":293,"_95":294,"_155":295,"_157":-5,"_158":137,"_159":160,"_161":162,"_105":296,"_99":32,"_164":182,"_166":297,"_167":22,"_168":-5,"_169":298,"_98":299},"fa9aa84e-888f-11f0-8712-0224a6c84d84",".cursorrules","01990e48-456a-760f-80ad-e07376055572",["D",1756881241396],"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",[],[294],{"_103":301,"_95":302,"_155":303,"_157":-5,"_158":137,"_159":160,"_161":162,"_105":304,"_99":32,"_164":182,"_166":305,"_167":22,"_168":-5,"_169":306,"_98":307},"fa9ab9b0-888f-11f0-8712-0224a6c84d84",".vtignore","01990e48-456a-760f-80ad-e70ac9973dd6",["D",1756881241396],".git\n.vscode\n.DS_Store\nnode_modules\nvendor\n",[],[302],{"_103":309,"_95":310,"_155":311,"_157":-5,"_158":137,"_159":160,"_161":162,"_105":312,"_99":32,"_164":182,"_166":313,"_167":22,"_168":-5,"_169":314,"_98":315},"fa9abae6-888f-11f0-8712-0224a6c84d84","deno.json","01990e48-456a-760f-80ad-e907572e4750",["D",1756881241396],"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/348900b8b79f4a434cab4c74b3bc8d4d2fa8ee74/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": false,\n \"types\": [\n \"https://www.val.town/types/valtown.d.ts\"\n ],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"files\": {\n \"include\": [\n \"deno:/https/esm.town/**/*\"\n ]\n },\n \"rules\": {\n \"exclude\": [\n \"no-explicit-any\"\n ]\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}",[],[310],{"_103":317,"_95":318,"_155":319,"_157":-5,"_158":137,"_159":320,"_161":22,"_105":321,"_99":280,"_164":182,"_166":322,"_167":22,"_168":-5,"_169":323,"_98":324},"38cef170-889e-11f0-a96c-0224a6c84d84","knowledge.md","01990e48-456a-760f-80ad-ef598b61abd0",39,["D",1756887358733],"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- If a file has an export that can be used with a trigger, do not move the stable.\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#### SQLite queries\n\nWhen you do `sqlite.execute()` to query the database, parse results using zod \n\n```ts\nawait sqlite.execite(query);\nresult.rows.forEach((row, index) => {\n const parsed = QueriedStorageType.parse({\n fieldName: row[0],\n otherFieldName: row[1],\n // etc.\n });\n```\n\n#### Batching operations\n\n```ts\nimport { sqlite } from \"https://esm.town/v/std/sqlite\";\n\nconst charge = 10;\n\nexport const batchSqlite = await sqlite.batch([\n `create table if not exists accounts(person_id text unique, balance integer)`,\n {\n sql: `update accounts set balance = balance - :charge where person_id = 'Bob'`,\n args: { charge },\n },\n {\n sql: `update accounts set balance = balance + :charge where person_id = 'Alice'`,\n args: { charge },\n },\n]);\n```\n\n### OpenAI\n\nDo not use val.town std library, import from https://esm.town/v/cricks_unmixed4u/openai-client/main.tsx and use\n\n## GreenPTClient\n\nThe `GreenPTClient` is a function that allows interaction with the GreenPT API for chat completions. It accepts a model parameter and provides an `invoke` method to send messages and retrieve responses asynchronously. To ensure API security, it requires an API key stored in environment variables.\n\n### Example Usage\n\n```tsx\nimport { GreenPTClient } from \"https://esm.town/v/cricks_unmixed4u/openai-client/main.tsx\";\n\nconst client = GreenPTClient(\"green-l\");\n\nasync function getChatResponse() {\n const messages = [\n { role: \"user\", content: \"What is the capital of France?\" },\n ];\n\n try {\n const response = await client.invoke(messages);\n console.log(\"AI Response:\", response);\n } catch (error) {\n console.error(\"Error invoking GreenPT API:\", error);\n }\n}\n\n// Execute the function to get a response\ngetChatResponse();\n```\n\nIn this example, we create an instance of `GreenPTClient`, send a message asking about the capital of France, and log the AI's response. Error handling is included to catch any issues with the API call.\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- **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# Implementation plan\n\n## DONE - Step 1 - Initial backend implementation\n\nGiven shared/types and the knowledge in this file, implement a backend\n\n```ts\n// ... redacted for brevity\n```\n\n## DONE - STEP 2 - Implement frontend to support pairwise comparisons\n\nFor instance, rendered UI should be like:\n\n\n```tsx\n// ... redacted for brevity\n```\n\n## DONE - STEP 3 - Implement possibility to add items to created lists\n\nAfter I create a list, show me the items of the list in an \"edit mode\" where I can add items one-by-one with a simple input.\n\n## Step 4 - Implement a list of past sessions \n\nI'd like to be able to see my past sessions. For now just implement the list, in future we'll also implement a result view that can be navigated from the 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* as z from \"https://esm.sh/zod@3\";\n\n/** Core models */\n\nexport const Id = z.string().uuid().brand<\"Id\">();\n\nexport const Item = z.object({\n id: Id,\n listId: Id,\n label: z.string().min(1).max(200),\n meta: z.record(z.any(), z.any()).default({}),\n createdAt: z.string().datetime(),\n updatedAt: z.string().datetime(),\n});\nexport type Item = z.infer;\n\nexport const List = z.object({\n id: Id,\n ownerId: z.string(), // your auth/user id strategy\n title: z.string().min(1).max(200),\n description: z.string().max(1000).optional(),\n createdAt: z.string().datetime(),\n updatedAt: z.string().datetime(),\n});\nexport type List = z.infer;\n\n/** Pairwise comparison */\n\nexport const PairwiseSession = z.object({\n id: Id,\n listId: Id,\n userId: z.string(),\n strategy: z.enum([\"random\", \"balanced\"]), // how pairs are served\n createdAt: z.string().datetime(),\n closedAt: z.string().datetime().nullable(),\n});\nexport type PairwiseSession = z.infer;\n\nexport const PairwiseVote = z.object({\n id: Id,\n sessionId: Id,\n listId: Id,\n leftItemId: Id,\n rightItemId: Id,\n winnerItemId: Id, // = left or right\n createdAt: z.string().datetime(),\n});\nexport type PairwiseVote = z.infer;\n\n/** Budget allocation */\n\nexport const BudgetSession = z.object({\n id: Id,\n listId: Id,\n userId: z.string(),\n budget: z.number().positive().finite(), // e.g., 100 points\n createdAt: z.string().datetime(),\n submittedAt: z.string().datetime().nullable(),\n});\nexport type BudgetSession = z.infer;\n\nexport const BudgetAllocation = z.object({\n id: Id,\n sessionId: Id,\n listId: Id,\n itemId: Id,\n amount: z.number().min(0).finite(),\n createdAt: z.string().datetime(),\n});\nexport type BudgetAllocation = z.infer;\n\n/** Derived ranking */\n\nexport const RankingRow = z.object({\n itemId: Id,\n score: z.number(), // higher = better\n method: z.enum([\"pairwise\", \"budget\", \"hybrid\"]),\n});\nexport type RankingRow = z.infer;\n\n/** Requests */\n\nexport const CreateListReq = z.object({\n title: z.string().min(1),\n description: z.string().optional(),\n});\nexport const CreateItemReq = z.object({\n listId: Id,\n label: z.string().min(1),\n meta: z.record(z.any(), z.any()).optional(),\n});\n\nexport const StartPairwiseReq = z.object({\n listId: Id,\n strategy: z.enum([\"random\", \"balanced\"]).default(\"balanced\"),\n});\nexport const SubmitPairwiseVoteReq = z.object({\n sessionId: Id,\n leftItemId: Id,\n rightItemId: Id,\n winnerItemId: Id,\n});\n\nexport const StartBudgetReq = z.object({\n listId: Id,\n budget: z.number().positive(),\n});\nexport const SubmitBudgetReq = z.object({\n sessionId: Id,\n allocations: z.array(\n z.object({ itemId: Id, amount: z.number().min(0) }),\n ).min(1),\n});\n\n/** Responses */\n\nexport const PairToCompare = z.object({\n sessionId: Id,\n left: Item,\n right: Item,\n});\nexport type PairToCompare = z.infer;\n\nexport const BudgetEnvelope = z.object({\n sessionId: Id,\n budget: z.number(),\n items: z.array(Item),\n // optional server-side prefill\n current: z.array(z.object({ itemId: Id, amount: z.number().min(0) })).default(\n [],\n ),\n});\n\nexport const RankingRes = z.object({\n listId: Id,\n rows: z.array(RankingRow),\n});\nexport type RankingRes = z.infer;\n","shared/types.ts","actionData","errors"]