ItChat

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_193":194,"_195":196},"routes/_app.x.$handle.$name",{"_97":96,"_32":44,"_106":83,"_27":107,"_13":14,"_108":-5,"_11":109,"_110":111,"_112":113,"_114":115,"_116":117,"_20":-5,"_118":119,"_120":121,"_122":25,"_123":124,"_125":56,"_126":-5,"_127":-5,"_128":129},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_42":43,"_32":44,"_37":45,"_46":-5,"_47":25,"_48":49,"_50":49,"_51":-5,"_52":-5,"_18":53,"_54":31,"_55":56,"_57":-5,"_58":-5,"_59":60,"_61":62,"_63":-5,"_64":-5,"_65":-5,"_66":-5,"_67":68,"_69":68,"_70":71,"_72":71,"_73":71,"_74":68,"_75":68,"_76":77,"_78":79,"_80":81,"_82":25},"version",54,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":34,"_35":36,"_37":38,"_39":14,"_40":41,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","new-file-1764.ts","latestPath","fileId","a5919ed0-ab29-11f1-8034-1607ee4eb77e","name","fileType","http","content","import _ from \"npm:lodash@4\";\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\n// OpenAI-compatible proxy. No key needed: the injected `valtown` token\n// (available in every val automatically) is used to authenticate.\nconst PROXY = \"https://std-openaiproxy.web.val.run/v1\";\n\nconst SYSTEM_PROMPT =\n \"You are VALL-E, a friendly coding chatbot. Keep chat responses concise and conversational. \" +\n \"Whenever you include code, wrap it in a fenced code block using triple backticks with a language tag, \" +\n \"like ```ts\\\\n ... \\\\n```. Only one code block per message. When finished, stop.\";\n\nconst MAX_HISTORY = 40; // cap stored messages to keep context + storage bounded\n\ntype Msg = { role: \"user\" | \"assistant\"; content: string };\n\n// --- persistence helpers -----------------------------------------------------\n\nfunction clientIp(req: Request): string {\n const cf = req.headers.get(\"cf-connecting-ip\");\n if (cf) return cf;\n const xff = req.headers.get(\"x-forwarded-for\");\n if (xff) return xff.split(\",\")[0].trim();\n return \"unknown\";\n}\n\nfunction parseCookie(h: string | null): Record {\n const o: Record = {};\n if (!h) return o;\n for (const part of h.split(\";\")) {\n const i = part.indexOf(\"=\");\n if (i > 0) {\n o[part.slice(0, i).trim()] = decodeURIComponent(part.slice(i + 1));\n }\n }\n return o;\n}\n\n// Resolve a stable per-browser id (from the form, falling back to a cookie,\n// and finally an anonymous IP key).\nfunction getUid(form: FormData | null, req: Request): string {\n const fromForm = form?.get(\"uid\") as string | null;\n if (fromForm) return fromForm;\n const cookieUid = parseCookie(req.headers.get(\"cookie\"))[\"valle_uid\"];\n if (cookieUid) return cookieUid;\n return \"anon_\" + clientIp(req);\n}\n\nasync function loadHistory(key: string): Promise {\n try {\n const v = await blob.getJSON(key);\n return Array.isArray(v) ? v : [];\n } catch {\n return [];\n }\n}\n\n// --- AI + code execution -----------------------------------------------------\n\ntype ChatMessage = {\n role: \"system\" | \"user\" | \"assistant\" | \"tool\";\n content?: string | null;\n tool_calls?: Array<{\n id: string;\n type: \"function\";\n function: { name: string; arguments: string };\n }>;\n tool_call_id?: string;\n};\n\nconst MODEL = Deno.env.get(\"VALLE_MODEL\") || \"gpt-4o\";\nconst MAX_AGENT_STEPS = 6;\nconst MAX_CODE_CHARS = 30000;\nconst MAX_OUTPUT_CHARS = 8000;\n\nconst RUN_CODE_TOOL = {\n type: \"function\",\n function: {\n name: \"run_code\",\n description:\n \"Run JavaScript or TypeScript directly inside the existing Val runtime with the restricted native runner. Use this whenever you need to test code, reproduce an error, verify a fix, or debug code. Never claim code works until it has been run successfully.\",\n parameters: {\n type: \"object\",\n additionalProperties: false,\n properties: {\n language: {\n type: \"string\",\n enum: [\"javascript\", \"typescript\"],\n description: \"Programming language to execute.\",\n },\n code: {\n type: \"string\",\n description:\n \"Complete source code to execute. For TypeScript, normal TypeScript syntax is accepted.\",\n },\n stdin: {\n type: \"string\",\n description: \"Optional input available to the program as __stdin.\",\n },\n },\n required: [\"language\", \"code\"],\n },\n },\n};\n\nfunction clip(s: string, n = MAX_OUTPUT_CHARS): string {\n if (s.length <= n) return s;\n return s.slice(0, n) + `\\\\n… [output truncated at ${n} characters]`;\n}\n\nasync function transpileTypeScript(code: string): Promise {\n const ts = await import(\"npm:typescript@5.9.2\");\n const result = ts.transpileModule(code, {\n compilerOptions: {\n target: ts.ScriptTarget.ES2022,\n module: ts.ModuleKind.ESNext,\n jsx: ts.JsxEmit.ReactJSX,\n sourceMap: false,\n removeComments: false,\n },\n reportDiagnostics: true,\n });\n\n const diagnostics = result.diagnostics || [];\n if (diagnostics.length) {\n const message = diagnostics\n .map((d: any) => ts.flattenDiagnosticMessageText(d.messageText, \"\\\\n\"))\n .join(\"\\\\n\");\n throw new Error(`TypeScript compile error:\\\\n${message}`);\n }\n return result.outputText;\n}\n\nasync function runInWorker(code: string, stdin: string): Promise<{\n stdout: string;\n stderr: string;\n code: number | null;\n timedOut: boolean;\n}> {\n // Val Town's runtime is already a Deno sandbox. A nested Worker is not\n // reliable in every Val execution context, so keep the runner in-process.\n // The guard below is intentionally conservative: the runner is for testing\n // AI-generated snippets, not for exposing a general-purpose shell/runtime.\n const blocked =\n /(?:Deno|globalThis|process|Bun|require|fetch|WebSocket|Worker|SharedArrayBuffer|import\\s*\\(|export\\s+|constructor|__proto__|prototype|eval\\s*\\(|Function\\s*\\()/;\n if (blocked.test(code)) {\n return {\n stdout: \"\",\n stderr:\n \"Execution blocked: the test snippet uses a restricted runtime API.\",\n code: 1,\n timedOut: false,\n };\n }\n\n const output: string[] = [];\n const errors: string[] = [];\n const serialize = (value: unknown) => {\n try {\n if (typeof value === \"string\") return value;\n const json = JSON.stringify(\n value,\n (_key, v) => typeof v === \"bigint\" ? String(v) + \"n\" : v,\n );\n return json === undefined ? String(value) : json;\n } catch {\n return String(value);\n }\n };\n\n const consoleProxy = {\n log: (...args: unknown[]) => output.push(args.map(serialize).join(\" \")),\n info: (...args: unknown[]) => output.push(args.map(serialize).join(\" \")),\n warn: (...args: unknown[]) => errors.push(args.map(serialize).join(\" \")),\n error: (...args: unknown[]) => errors.push(args.map(serialize).join(\" \")),\n debug: (...args: unknown[]) => output.push(args.map(serialize).join(\" \")),\n };\n\n try {\n const execute = new Function(\n \"console\",\n \"__stdin\",\n '\"use strict\"; return (async () => {\\n' + code + \"\\n})();\",\n );\n\n const result = await Promise.race([\n execute(consoleProxy, String(stdin || \"\")),\n new Promise((_, reject) =>\n setTimeout(\n () => reject(new Error(\"Execution timed out after 3000 ms.\")),\n 3000,\n )\n ),\n ]);\n\n if (result !== undefined) output.push(serialize(result));\n return {\n stdout: clip(output.join(\"\\n\")),\n stderr: clip(errors.join(\"\\n\")),\n code: 0,\n timedOut: false,\n };\n } catch (error) {\n const message = error instanceof Error\n ? (error.stack || error.message)\n : String(error);\n return {\n stdout: clip(output.join(\"\\n\")),\n stderr: clip(errors.concat(message).join(\"\\n\")),\n code: 1,\n timedOut: message.includes(\"timed out\"),\n };\n }\n}\n\nasync function runCode(language: string, code: string, stdin = \"\") {\n if (!code.trim()) throw new Error(\"No code was supplied.\");\n if (code.length > MAX_CODE_CHARS) {\n throw new Error(\n `Code is too large. Maximum is ${MAX_CODE_CHARS} characters.`,\n );\n }\n\n const normalized = language.toLowerCase();\n if (normalized !== \"javascript\" && normalized !== \"typescript\") {\n throw new Error(\n \"The native Val runner supports JavaScript and TypeScript only.\",\n );\n }\n\n let executable = code;\n if (normalized === \"typescript\") executable = await transpileTypeScript(code);\n\n const result = await runInWorker(executable, stdin);\n return {\n language: normalized,\n runner: \"Val Town in-process runner\",\n compile: {\n stdout: \"\",\n stderr: \"\",\n code: 0,\n },\n run: {\n stdout: result.stdout,\n stderr: result.stderr,\n code: result.code,\n signal: result.timedOut ? \"TIMEOUT\" : null,\n },\n };\n}\n\nasync function callModel(\n token: string,\n messages: ChatMessage[],\n useTools: boolean,\n): Promise {\n const res = await fetch(`${PROXY}/chat/completions`, {\n method: \"POST\",\n headers: {\n \"content-type\": \"application/json\",\n authorization: `Bearer ${token}`,\n },\n body: JSON.stringify({\n model: MODEL,\n messages,\n ...(useTools ? { tools: [RUN_CODE_TOOL], tool_choice: \"auto\" } : {}),\n max_completion_tokens: 3000,\n reasoning_effort: \"none\",\n }),\n });\n\n if (!res.ok) {\n throw new Error(\n `Model request failed: ${res.status} ${\n (await res.text().catch(() => \"\")).slice(0, 500)\n }`,\n );\n }\n return await res.json();\n}\n\nasync function agentChat(\n token: string,\n messages: ChatMessage[],\n onStatus: (text: string) => void,\n): Promise {\n const working = [...messages];\n\n for (let step = 0; step < MAX_AGENT_STEPS; step++) {\n const response = await callModel(token, working, true);\n const message = response.choices?.[0]?.message;\n if (!message) throw new Error(\"The model returned no message.\");\n\n const toolCalls = Array.isArray(message.tool_calls)\n ? message.tool_calls\n : [];\n if (!toolCalls.length) return String(message.content || \"\").trim();\n\n working.push({\n role: \"assistant\",\n content: message.content ?? null,\n tool_calls: toolCalls,\n });\n\n for (const call of toolCalls) {\n if (call.function?.name !== \"run_code\") continue;\n\n let args: any;\n try {\n args = JSON.parse(call.function.arguments || \"{}\");\n } catch {\n working.push({\n role: \"tool\",\n tool_call_id: call.id,\n content: JSON.stringify({\n ok: false,\n error: \"The tool arguments were invalid JSON.\",\n }),\n });\n continue;\n }\n\n const language = String(args.language || \"\").toLowerCase();\n const code = String(args.code || \"\");\n const stdin = String(args.stdin || \"\");\n onStatus(`Running ${language || \"code\"}…`);\n\n try {\n const result = await runCode(language, code, stdin);\n working.push({\n role: \"tool\",\n tool_call_id: call.id,\n content: JSON.stringify({ ok: true, result }),\n });\n } catch (error) {\n working.push({\n role: \"tool\",\n tool_call_id: call.id,\n content: JSON.stringify({\n ok: false,\n error: error instanceof Error ? error.message : String(error),\n }),\n });\n }\n }\n }\n\n // If the model keeps requesting tools, force a final answer instead of looping forever.\n const final = await callModel(token, [\n ...working,\n {\n role: \"user\",\n content:\n \"Stop executing code now. Summarize the latest test result and provide the best fix you can.\",\n },\n ], false);\n return String(\n final.choices?.[0]?.message?.content ||\n \"I could not finish debugging this.\",\n ).trim();\n}\n\n// --- markdown rendering ------------------------------------------------------\n\nfunction esc(s: string): string {\n return _.escape(s);\n}\n\n// Inline formatting (bold, italic, inline code, links). Input is already escaped.\nfunction inline(s: string): string {\n s = s.replace(/`([^`]+)`/g, (_m, c: string) => `${c}`);\n s = s.replace(/\\*\\*([^*]+)\\*\\*/g, \"$1\");\n s = s.replace(/\\*([^*\\n]+)\\*/g, \"$1\");\n s = s.replace(\n /\\[([^\\]]+)\\]\$((?:https?|mailto):\\/\\/[^)\\s]+|#[A-Za-z0-9_-]+)\$/g,\n '$1',\n );\n return s;\n}\n\n// Block-level markdown for a text segment (outside code fences).\nfunction renderText(seg: string): string {\n const lines = seg.split(\"\\n\");\n let html = \"\";\n let para: string[] = [];\n let listType: \"ul\" | \"ol\" | null = null;\n let listBuffer: string[] = [];\n\n const flushP = () => {\n if (para.length) {\n html += `

${inline(esc(para.join(\" \")))}

`;\n para = [];\n }\n };\n const flushList = () => {\n if (listType) {\n html += `<${listType}>` + listBuffer.map((li) =>\n `

${inline(esc(li))}

`\n ).join(\"\") + ``;\n listType = null;\n listBuffer = [];\n }\n };\n\n for (const raw of lines) {\n const line = raw.trimEnd();\n const heading = line.match(/^(#{1,3})\\s+(.*)$/);\n if (heading) {\n flushP();\n flushList();\n const lv = \"h\" + heading[1].length;\n html += `<${lv}>${inline(esc(heading[2]))}`;\n continue;\n }\n const ul = line.match(/^[-*]\\s+(.*)$/);\n const ol = line.match(/^\\d+\\.\\s+(.*)$/);\n if (ul || ol) {\n flushP();\n const item = ul ? ul[1]! : ol![1]!;\n const type: \"ul\" | \"ol\" = ul ? \"ul\" : \"ol\";\n if (listType === type) listBuffer.push(item);\n else {\n flushList();\n listType = type;\n listBuffer.push(item);\n }\n continue;\n }\n if (/^\\s*>\\s?/.test(line)) {\n flushP();\n flushList();\n html += `

${\n inline(esc(line.replace(/^\\s*>\\s?/, \"\")))\n }

`;\n continue;\n }\n if (line.trim() === \"\") {\n flushP();\n flushList();\n continue;\n }\n flushList();\n para.push(line);\n }\n flushP();\n flushList();\n return html;\n}\n\nfunction codeBlock(lang: string, code: string): string {\n return (\n `

` +\n `

${esc(lang)}` +\n `

` +\n `

${esc(code)}

` +\n `

`\n );\n}\n\nfunction renderInner(full: string): string {\n const regex = /```(\\w*)\\s*\\n([\\s\\S]*?)```/g;\n let out = \"\";\n let last = 0;\n let m: RegExpExecArray | null;\n while ((m = regex.exec(full))) {\n if (m.index > last) out += renderText(full.slice(last, m.index));\n out += codeBlock(m[1] || \"code\", m[2].replace(/\\n$/, \"\"));\n last = m.index + m[0].length;\n }\n if (last < full.length) out += renderText(full.slice(last));\n return out || renderText(full);\n}\n\n// --- view helpers -------------------------------------------------------------\n\nfunction assistantMsg(inner: string): string {\n return (\n `

` +\n `

${inner}

` +\n `

`\n );\n}\n\nfunction userMsg(content: string): string {\n return `

${\n inline(esc(content))\n }

`;\n}\n\nasync function main(req: Request): Promise {\n const { readable, writable } = new TransformStream();\n const writer = writable.getWriter();\n const write = (t: string) => writer.write(new TextEncoder().encode(t));\n\n (async () => {\n try {\n const form = req.method === \"POST\" ? await req.formData() : null;\n const uid = getUid(form, req);\n const key = `chat_${uid}`;\n const userText = (form?.get(\"userprompt\") as string) ?? \"\";\n\n let history: Msg[] = [];\n if (form?.get(\"clear\")) {\n await blob.delete(key);\n } else {\n history = await loadHistory(key);\n }\n\n write(`\n\n\n \n ItChat\n \n\n\n \n

`);\n\n // Render prior conversation\n for (const msg of history) {\n if (msg.role === \"user\") {\n write(userMsg(msg.content));\n } else {\n write(assistantMsg(renderInner(msg.content)));\n }\n }\n\n if (userText) {\n const nextHistory: Msg[] = [...history.slice(-MAX_HISTORY), {\n role: \"user\",\n content: userText,\n }];\n // persist the user's message so it survives even if generation fails\n await blob.setJSON(key, nextHistory);\n write(userMsg(userText));\n\n // Show a small live status while the agent runs/tests code.\n write(\n `

` +\n `

Thinking…

`,\n );\n\n const token = Deno.env.get(\"valtown\");\n if (!token) {\n throw new Error(\"The Val Town 'valtown' token is unavailable.\");\n }\n\n const modelMessages: ChatMessage[] = [\n {\n role: \"system\",\n content: SYSTEM_PROMPT +\n \" You have a run_code tool. Use it to test and debug JavaScript and TypeScript directly in this Val. \" +\n \"When a test fails, inspect the exact error, fix the code, and run it again. \" +\n \"Do not say code works unless a run succeeded. Keep the final response concise.\",\n },\n ...nextHistory,\n ];\n\n const full = await agentChat(token, modelMessages, (status) => {\n write(\n ``,\n );\n });\n\n const newHistory: Msg[] = [...nextHistory, {\n role: \"assistant\",\n content: full,\n }];\n await blob.setJSON(key, newHistory.slice(-MAX_HISTORY));\n const rendered = assistantMsg(renderInner(full));\n write(\n `` +\n ``,\n );\n }\n if (!userText && history.length === 0) {\n write(\n `

Ask me to write, run, or debug code — press Enter to send.

`,\n );\n }\n\n write(`

`);\n\n // Input area\n write(\n `

` +\n `

`,\n );\n\n write(\n ``,\n );\n\n write(``);\n } catch (e) {\n write(\n `

Something went wrong: ${\n _.escape((e && (e as any).message) || e)\n }

`,\n );\n } finally {\n writer.close();\n }\n })();\n\n return new Response(readable, { headers: { \"Content-Type\": \"text/html\" } });\n}\n\nexport default main;","createdAt",["D",1788837966880],"branchVersion","branchId","b7d72ad9-66df-4de5-8cb2-e4dd9ded47ed","id","f2ccd201-cd1b-4c09-95e8-468bddd1219a","itchatbot",["D",1788751737705],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","imageUrl","71dd8e68-0bdc-406a-80ca-10c2c5c89c48","pinnedFileId","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a079d4-a61e-70f7-8070-e49f40e3accd","tursoName","tursoHostname","tursoMeasuredAt","pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_97":96,"_105":101},"org",{"_97":96,"_98":99,"_100":101,"_18":53,"_102":103,"_104":25},"branch",{"_13":14,"_32":83,"_42":41,"_84":43,"_85":86,"_87":88,"_89":49,"_90":91,"_92":93,"_94":44,"_95":96},"isOwned","main","projectId","forkedBranchId","9d8f7034-26de-11f0-a5b3-569c3dd06744","forkedBranchVersion",4,"forkedProjectPrivacy","forkedProjectId","9d8f23ea-26de-11f0-a5b3-569c3dd06744","forkedProjectOrgId","f9c69a1c-4300-4bec-b4cf-7c54a6c90f97","projectName","userHandle","itdude207","handle","displayName","ITDUDE207","avatar","https://avatars.githubusercontent.com/u/261690574?v=4","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_42":43,"_32":44,"_37":189,"_46":-5,"_47":25,"_48":49,"_50":49,"_51":-5,"_52":-5,"_18":53,"_54":31,"_55":56,"_57":-5,"_58":-5,"_59":60,"_61":62,"_63":-5,"_64":-5,"_65":-5,"_66":-5,"_67":68,"_69":68,"_70":71,"_72":71,"_73":71,"_74":68,"_75":68,"_76":190,"_78":191,"_80":192,"_82":25},"tree",[176,177,178],"files",[176,177,178],"counts",{"_166":60,"_167":163,"_168":60,"_169":170,"_171":172},"contents",[139,140,141],"upstreamProject",{"_42":91,"_32":136,"_51":-5,"_52":-5,"_48":49,"_76":137},"upstreamBranch",{"_42":86,"_37":130,"_131":132,"_32":83,"_84":91,"_13":88,"_85":-5,"_87":-5,"_133":134,"_46":-5,"_82":25,"_48":49,"_95":135,"_61":93,"_94":136},"emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},["D",1746139801646],"updatedAt",["D",1723130638498],"lockfileKey","1746159453328-esm.town_v_janpaul123_valleBlogV0@4-main","janpaul123","valleBlogV0",{"_97":135,"_105":138},"https://img.clerk.com/eyJ0eXBlIjoicHJveHkiLCJzcmMiOiJodHRwczovL2ltYWdlcy5jbGVyay5kZXYvdXBsb2FkZWQvaW1nXzJncEQ0elVic1BxOU15TkFMV0JCUkdRQndWMCJ9",{"_42":158,"_32":159,"_30":160,"_143":-5,"_40":41,"_39":161,"_144":56,"_37":162,"_13":163,"_33":20,"_35":164,"_24":25,"_147":-5,"_27":165},{"_42":150,"_32":151,"_30":152,"_143":-5,"_40":41,"_39":153,"_144":56,"_37":154,"_13":155,"_33":34,"_35":156,"_24":25,"_147":-5,"_27":157},{"_42":142,"_32":28,"_30":31,"_143":-5,"_40":41,"_39":14,"_144":56,"_37":145,"_13":146,"_33":34,"_35":36,"_24":25,"_147":148,"_27":149},"f7f24c2e-a3da-4752-8490-9f896d25c277","parentId","latest",["D",1788837966880],9,"label","itchat",[28],"157d0939-880a-4139-aefa-e367d5b6d105","main.tsx","01a079e9-73b0-76d8-a7b4-aa1922e8a3f8",44,["D",1788754119501],27,"import _ from \"npm:lodash@4\";\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\n// OpenAI-compatible proxy. No key needed: the injected `valtown` token\n// (available in every val automatically) is used to authenticate.\nconst PROXY = \"https://std-openaiproxy.web.val.run/v1\";\n\nconst SYSTEM_PROMPT =\n \"You are VALL-E, a friendly coding chatbot. Keep chat responses concise and conversational. \" +\n \"Whenever you include code, wrap it in a fenced code block using triple backticks with a language tag, \" +\n \"like ```ts\\\\n ... \\\\n```. Only one code block per message. When finished, stop.\";\n\nconst MAX_HISTORY = 40; // cap stored messages to keep context + storage bounded\n\ntype Msg = { role: \"user\" | \"assistant\"; content: string };\n\n// --- persistence helpers -----------------------------------------------------\n\nfunction clientIp(req: Request): string {\n const cf = req.headers.get(\"cf-connecting-ip\");\n if (cf) return cf;\n const xff = req.headers.get(\"x-forwarded-for\");\n if (xff) return xff.split(\",\")[0].trim();\n return \"unknown\";\n}\n\nfunction parseCookie(h: string | null): Record {\n const o: Record = {};\n if (!h) return o;\n for (const part of h.split(\";\")) {\n const i = part.indexOf(\"=\");\n if (i > 0) {\n o[part.slice(0, i).trim()] = decodeURIComponent(part.slice(i + 1));\n }\n }\n return o;\n}\n\n// Resolve a stable per-browser id (from the form, falling back to a cookie,\n// and finally an anonymous IP key).\nfunction getUid(form: FormData | null, req: Request): string {\n const fromForm = form?.get(\"uid\") as string | null;\n if (fromForm) return fromForm;\n const cookieUid = parseCookie(req.headers.get(\"cookie\"))[\"valle_uid\"];\n if (cookieUid) return cookieUid;\n return \"anon_\" + clientIp(req);\n}\n\nasync function loadHistory(key: string): Promise {\n try {\n const v = await blob.getJSON(key);\n return Array.isArray(v) ? v : [];\n } catch {\n return [];\n }\n}\n\n// --- streaming ---------------------------------------------------------------\n\nasync function streamChat(\n token: string,\n messages: { role: string; content: string }[],\n onDelta: (text: string) => void,\n): Promise {\n const res = await fetch(`${PROXY}/chat/completions`, {\n method: \"POST\",\n headers: {\n \"content-type\": \"application/json\",\n authorization: `Bearer ${token}`,\n },\n body: JSON.stringify({\n model: \"gpt-4o\",\n messages,\n stream: true,\n max_completion_tokens: 2000,\n }),\n });\n if (!res.ok || !res.body) {\n throw new Error(\n `Model request failed: ${res.status} ${\n (await res.text().catch(() => \"\")).slice(0, 200)\n }`,\n );\n }\n\n const reader = res.body.getReader();\n const decoder = new TextDecoder();\n let buffer = \"\";\n let full = \"\";\n let sawDone = false;\n\n const processLine = (line: string) => {\n const trimmed = line.trim();\n if (!trimmed.startsWith(\"data:\")) return;\n const data = trimmed.slice(5).trim();\n if (data === \"[DONE]\") {\n sawDone = true;\n return;\n }\n try {\n const j = JSON.parse(data);\n const delta: string | undefined = j.choices?.[0]?.delta?.content;\n if (delta) {\n full += delta;\n onDelta(delta);\n }\n } catch {\n // ignore keep-alive / partial lines\n }\n };\n\n while (true) {\n const { done, value } = await reader.read();\n if (done) break;\n buffer += decoder.decode(value, { stream: true });\n let nl: number;\n while ((nl = buffer.indexOf(\"\\n\")) >= 0) {\n const line = buffer.slice(0, nl);\n buffer = buffer.slice(nl + 1);\n processLine(line);\n }\n }\n if (buffer.trim()) processLine(buffer);\n\n if (!sawDone && full) {\n throw new Error(\n \"The response was cut off mid-stream — please send your message again.\",\n );\n }\n return full;\n}\n\n// --- markdown rendering ------------------------------------------------------\n\nfunction esc(s: string): string {\n return _.escape(s);\n}\n\n// Inline formatting (bold, italic, inline code, links). Input is already escaped.\nfunction inline(s: string): string {\n s = s.replace(/`([^`]+)`/g, (_m, c: string) => `${c}`);\n s = s.replace(/\\*\\*([^*]+)\\*\\*/g, \"$1\");\n s = s.replace(/\\*([^*\\n]+)\\*/g, \"$1\");\n s = s.replace(\n /\\[([^\\]]+)\\]\$((?:https?|mailto):\\/\\/[^)\\s]+|#[A-Za-z0-9_-]+)\$/g,\n '$1',\n );\n return s;\n}\n\n// Block-level markdown for a text segment (outside code fences).\nfunction renderText(seg: string): string {\n const lines = seg.split(\"\\n\");\n let html = \"\";\n let para: string[] = [];\n let listType: \"ul\" | \"ol\" | null = null;\n let listBuffer: string[] = [];\n\n const flushP = () => {\n if (para.length) {\n html += `

${inline(esc(para.join(\" \")))}

`;\n para = [];\n }\n };\n const flushList = () => {\n if (listType) {\n html += `<${listType}>` + listBuffer.map((li) =>\n `

${inline(esc(li))}

${\n inline(esc(line.replace(/^\\s*>\\s?/, \"\")))\n }

` +\n `

${esc(lang)}` +\n `

` +\n `

${esc(code)}

` +\n `

${inner}

` +\n `

`\n );\n}\n\nfunction userMsg(content: string): string {\n return `

${\n inline(esc(content))\n }

`);\n\n // Render prior conversation\n for (const msg of history) {\n if (msg.role === \"user\") {\n write(userMsg(msg.content));\n } else {\n write(assistantMsg(renderInner(msg.content)));\n }\n }\n\n if (userText) {\n const nextHistory: Msg[] = [...history.slice(-MAX_HISTORY), {\n role: \"user\",\n content: userText,\n }];\n // persist the user's message so it survives even if generation fails\n await blob.setJSON(key, nextHistory);\n write(userMsg(userText));\n\n // NOTE: tags are intentionally left OPEN so the streamed deltas below\n // land *inside* the

. They are closed after streaming finishes.\n        write(\n          `` +\n            ``,\n        );\n\n        const token = Deno.env.get(\"valtown\");\n        const modelMessages = [\n          { role: \"system\", content: SYSTEM_PROMPT },\n          ...nextHistory,\n        ];\n\n        let full = \"\";\n        await streamChat(token, modelMessages, (d) => {\n          full += d;\n          write(_.escape(d));\n        });\n\n        // Close the tags left open above so the placeholder is a complete element.\n        write(`
`);\n\n        const newHistory: Msg[] = [...nextHistory, {\n          role: \"assistant\",\n          content: full,\n        }];\n        await blob.setJSON(key, newHistory.slice(-MAX_HISTORY));\n        const rendered = assistantMsg(renderInner(full));\n        write(\n          `` +\n            ``,\n        );\n      }\n      if (!userText && history.length === 0) {\n        write(\n          `Ask me to write some code — press Enter to send.
`,\n        );\n      }\n\n      write(`

`);\n\n // Input area\n write(\n `

` +\n `

`,\n );\n\n write(\n ``,\n );\n\n write(``);\n } catch (e) {\n write(\n `

Something went wrong: ${\n _.escape((e && (e as any).message) || e)\n }

`,\n );\n } finally {\n writer.close();\n }\n })();\n\n return new Response(readable, { headers: { \"Content-Type\": \"text/html\" } });\n}\n\nexport default main;",[151],"357a7bc2-ce65-4ccc-b895-93bd470886ab","README.md","01a079e9-73b0-76d8-a7b4-a5e9b886a96a",32,["D",1788752950189],1,"# VALL-E — coding chatbot\n\nA conversational chatbot that streams replies and returns code in copyable code blocks. No login or API key required.\n\n- Type a message; VALL-E streams its reply live.\n- Code is wrapped in fenced code blocks with a **Copy** button.\n- The conversation carries over between messages.\n\nUses the Val Town OpenAI proxy (`std-openaiproxy.web.val.run`) with the auto-injected `valtown` token, so there's nothing to configure.\n\nOpen the app: [url:main.tsx]\n",[159],"pulls","branches","forks","envVars",{"_173":60,"_175":60},"connections",{"_173":60,"_174":60},"count","unfilledCount","emptyCount",{"_42":158,"_32":159,"_30":160,"_143":-5,"_40":41,"_39":161,"_144":56,"_37":186,"_13":163,"_33":20,"_35":164,"_24":25,"_147":-5,"_180":187,"_27":188},{"_42":150,"_32":151,"_30":152,"_143":-5,"_40":41,"_39":153,"_144":56,"_37":183,"_13":155,"_33":34,"_35":156,"_24":25,"_147":-5,"_180":184,"_27":185},{"_42":142,"_32":28,"_30":31,"_143":-5,"_40":41,"_39":14,"_144":56,"_37":179,"_13":146,"_33":34,"_35":36,"_24":25,"_147":148,"_180":181,"_27":182},["D",1788837966880],"children",[],[28],["D",1788754119501],[],[151],["D",1788752950189],[],[159],["D",1788751737705],{"_97":96,"_105":101},{"_97":96,"_98":99,"_100":101,"_18":53,"_102":103,"_104":25},{"_13":14,"_32":83,"_42":41,"_84":43,"_85":86,"_87":88,"_89":49,"_90":91,"_92":93,"_94":44,"_95":96},"ctx",{"_76":-5,"_127":226,"_227":228,"_229":230,"_231":25,"_232":25,"_233":25,"_234":56,"_235":-5,"_236":-7,"_237":-7,"_238":60,"_239":25,"_240":25,"_241":-5,"_242":25,"_243":25,"_244":25,"_245":-5},"ENV",{"_197":198,"_199":200,"_201":83,"_202":203,"_204":205,"_206":207,"_208":209,"_210":211,"_212":213,"_214":215,"_216":217,"_218":219,"_220":221,"_222":223,"_224":225},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v54