\n\n

TownCar

Your personal driver for any task.
Tell us the destination, we'll handle the journey.

\n \n

\n\n

Your Itinerary

\n\n \n \n \n\n \n \n \n `;\n}\n\n// --- BACKEND: The Hono API Server ---\nconst app = new Hono();\n\nasync function callOpenAI(c, messages, response_format = { type: \"text\" }) {\n const openai = new OpenAI();\n const completion = await openai.chat.completions.create({\n model: \"gpt-4o\",\n messages: messages,\n response_format: response_format,\n });\n if (!completion || !completion.choices || completion.choices.length === 0) {\n throw new Error(\"The AI service returned an invalid or empty response.\");\n }\n return completion.choices[0].message.content;\n}\n\n// API: Plan Itinerary\napp.post(\"/api/plan-itinerary\", async (c) => {\n const { goal } = await c.req.json();\n try {\n const messages = [{\n role: \"system\",\n content: META_PROMPTS.ROUTE_PLANNER.replace(\"{{goal}}\", goal),\n }];\n const planJson = await callOpenAI(c, messages, { type: \"json_object\" });\n return c.json(JSON.parse(planJson));\n } catch (e) {\n console.warn(\n \"Initial route planning failed. Retrying with a simpler prompt...\",\n e,\n );\n try {\n const retryMessages = [{\n role: \"system\",\n content: META_PROMPTS.ROUTE_PLANNER_RETRY.replace(\"{{goal}}\", goal),\n }];\n const retryPlanJson = await callOpenAI(c, retryMessages, {\n type: \"json_object\",\n });\n return c.json(JSON.parse(retryPlanJson));\n } catch (retryError) {\n console.error(\"Route planning retry failed:\", retryError);\n return c.json({\n details:\n \"The AI failed to chart a course. Please try rephrasing your destination.\",\n }, 500);\n }\n }\n});\n\n// API: Prepare for Stop (Generates UI Schema)\napp.post(\"/api/prepare-stop\", async (c) => {\n try {\n const { task, context } = await c.req.json();\n const contextString = JSON.stringify(context, null, 2);\n const architectMessages = [{\n role: \"system\",\n content: META_PROMPTS.STOP_ARCHITECT.replace(\"{{task}}\", task).replace(\n \"{{context}}\",\n contextString,\n ),\n }];\n const specJson = await callOpenAI(c, architectMessages, {\n type: \"json_object\",\n });\n const spec = JSON.parse(specJson);\n let uiJson = '{\"inputs\":[]}';\n if (spec.inputs && spec.inputs.length > 0) {\n const uiBuilderMessages = [{\n role: \"system\",\n content: META_PROMPTS.UI_BUILDER.replace(\"{{spec}}\", specJson),\n }];\n uiJson = await callOpenAI(c, uiBuilderMessages, { type: \"json_object\" });\n }\n return c.json({ taskSpecification: spec, uiSchema: JSON.parse(uiJson) });\n } catch (e) {\n console.error(\"Stop preparation failed:\", e);\n return c.json({\n details: `The AI failed to prepare for the stop. Error: ${e.message}`,\n }, 500);\n }\n});\n\n// API: Drive to Stop (Executes Task and Streams Output)\napp.post(\"/api/drive-to-stop\", async (c) => {\n const { readable, writable } = new TransformStream();\n const writer = writable.getWriter();\n const textEncoder = new TextEncoder();\n new Promise(async (resolve, reject) => {\n try {\n const { task, context, inputs } = await c.req.json();\n const contextString = JSON.stringify(context, null, 2);\n const specJson = await callOpenAI(c, [{\n role: \"system\",\n content: META_PROMPTS.STOP_ARCHITECT.replace(\"{{task}}\", task).replace(\n \"{{context}}\",\n contextString,\n ),\n }], { type: \"json_object\" });\n let executionPrompt = await callOpenAI(c, [{\n role: \"system\",\n content: META_PROMPTS.LOGIC_WEAVER.replace(\"{{spec}}\", specJson)\n .replace(\"{{context}}\", contextString),\n }]);\n for (const [key, value] of Object.entries(inputs)) {\n executionPrompt = executionPrompt.replace(\n new RegExp(`\\\\{\\\\{\\\\s*${key}\\\\s*\\\\}\\\\}`, \"g\"),\n value,\n );\n }\n const openai = new OpenAI();\n const aiStream = await openai.chat.completions.create({\n model: \"gpt-4o\",\n messages: [{ role: \"user\", content: executionPrompt }],\n stream: true,\n });\n for await (const chunk of aiStream) {\n const content = chunk.choices[0]?.delta?.content || \"\";\n if (content) {\n await writer.write(textEncoder.encode(content));\n }\n }\n await writer.close();\n resolve();\n } catch (e) {\n console.error(\"Driving to stop (execution stream) failed:\", e);\n // We'll handle this on the client-side via the HTTP status code.\n // Trying to write an error to a potentially broken stream is unreliable.\n reject(e);\n // Ensure writer is closed on error\n try {\n await writer.close();\n } catch {}\n }\n });\n return new Response(readable, {\n headers: { \"Content-Type\": \"text/plain; charset=utf-8\" },\n });\n});\n\n// Serve the main HTML file\napp.get(\"/\", (c) => c.html(generateHtml(c.req.url)));\n\nexport default app.fetch;","deleted","label","ride",[63],{"_35":62,"_13":63,"_64":65,"_66":-5,"_67":68,"_69":70,"_71":72,"_37":83,"_17":31,"_74":75,"_76":77,"_78":52,"_79":80,"_84":85,"_18":86},["D",1754768931875],"children",[],[63],"af6a5f9e-683d-11f0-a23e-0224a6c84d84",["D",1753327459340],"legacyEnvVars","httpPrivacy","description","imageUrl","userId","63f04ac0-562b-11f0-a849-2f0fd58d5bdc","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",0,"0abcaa5c-2531-4e34-967b-6f68bd9904a8","tursoName","tursoHostname","tursoMeasuredAt","pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_11":12,"_131":127},"org",{"_11":12,"_125":-5,"_126":127,"_93":94,"_128":129,"_130":52},"branch",{"_17":70,"_13":16,"_35":68,"_41":87,"_44":36,"_46":121,"_122":54,"_123":42,"_124":58,"_59":14,"_55":12},9,"forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","displayName","avatar","https://img.clerk.com/eyJ0eXBlIjoiZGVmYXVsdCIsImlpZCI6Imluc18yTm10cGhQUklwU0tqZHNiOHNnNGd2ZjJURFUiLCJyaWQiOiJ1c2VyXzJ6Rng5NEh2b3dPMmVwbThwVm1keXA3aTk5bCJ9","tier","free","canRestrictVals","profileImageUrl","adoptOrgId",{"_35":87,"_13":14,"_37":170,"_50":-5,"_89":52,"_53":54,"_90":54,"_91":-5,"_92":-5,"_93":94,"_95":65,"_96":72,"_97":72,"_98":-5,"_99":100,"_57":101,"_102":-5,"_103":-5,"_104":-5,"_105":-5,"_106":107,"_108":107,"_109":110,"_111":110,"_112":110,"_113":107,"_114":107,"_115":171,"_117":172,"_119":173,"_51":52},[167],"files",[167],"counts",{"_158":100,"_159":31,"_160":100,"_34":161,"_162":163},[156],"upstreamProject",{"_35":42,"_13":60,"_91":-5,"_92":-5,"_53":54,"_115":154},"upstreamBranch",{"_35":36,"_37":152,"_39":153,"_13":16,"_41":42,"_17":43,"_44":45,"_46":47,"_48":49,"_50":-5,"_51":52,"_53":54,"_55":56,"_57":58,"_59":60},"emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},["D",1753285830593],["D",1753474841321],{"_11":56,"_131":155},"https://img.clerk.com/eyJ0eXBlIjoiZGVmYXVsdCIsImlpZCI6Imluc18yTm10cGhQUklwU0tqZHNiOHNnNGd2ZjJURFUiLCJyaWQiOiJ1c2VyXzJ4RElTYm91QXRtUWhBeEdMM1RYYUVmMVVwYSJ9",{"_35":62,"_13":63,"_64":65,"_66":-5,"_67":68,"_69":70,"_71":72,"_37":73,"_17":31,"_74":75,"_76":77,"_78":52,"_79":80,"_18":157},[63],"pulls","branches","forks",{"_164":100,"_166":100},"connections",{"_164":100,"_165":100},"count","unfilledCount","emptyCount",{"_35":62,"_13":63,"_64":65,"_66":-5,"_67":68,"_69":70,"_71":72,"_37":83,"_17":31,"_74":75,"_76":77,"_78":52,"_79":80,"_84":168,"_18":169},[],[63],["D",1753327459340],{"_11":12,"_131":127},{"_11":12,"_125":-5,"_126":127,"_93":94,"_128":129,"_130":52},{"_17":70,"_13":16,"_35":68,"_41":87,"_44":36,"_46":121,"_122":54,"_123":42,"_124":58,"_59":14,"_55":12},"ctx",{"_115":-5,"_149":207,"_208":209,"_210":211,"_212":52,"_213":52,"_214":52,"_215":72,"_216":-5,"_217":-7,"_218":-7,"_219":100,"_220":52,"_221":52,"_222":-5,"_223":52,"_224":52,"_225":52,"_226":-5},"ENV",{"_178":179,"_180":181,"_182":16,"_183":184,"_185":186,"_187":188,"_189":190,"_191":192,"_193":194,"_195":196,"_197":198,"_199":200,"_201":202,"_203":204,"_205":206},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","71c1b20804b3232a7e513be260cfffc1932a9e97","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"]

Code