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* Shared Townie agent: reads val source, sends to Claude, applies edits.\n * Used by podcast feedback to self-improve.\n */\nimport Anthropic from \"npm:@anthropic-ai/sdk@0.39.0\";\nimport { blob } from \"https://esm.town/v/std/blob?v=12\";\n\n// IMPORTANT: V2 API needs the UUID, not handle/valName\nconst VAL_UUID = \"9af62dd2-288f-11f1-b4ab-42dde27851f2\";\n\ninterface FileInfo {\n path: string;\n content: string;\n}\n\ninterface Edit {\n path: string;\n action: string;\n content: string;\n}\n\nexport interface AgentResult {\n aiText: string;\n appliedEdits: string[];\n}\n\nexport async function runAgent(userMessage: string, context?: string): Promise {\n const token = Deno.env.get(\"TOWNIE_TOKEN\");\n if (!token) throw new Error(\"TOWNIE_TOKEN not set\");\n\n // Read val's own files\n const files = await fetchValFiles(token);\n console.log(`Agent read ${files.length} files`);\n\n // Call Claude\n const anthropic = new Anthropic();\n const systemPrompt = buildSystemPrompt(files, context);\n\n const response = await anthropic.messages.create({\n model: \"claude-sonnet-4-20250514\",\n max_tokens: 4096,\n system: systemPrompt,\n messages: [\n { role: \"user\", content: userMessage },\n ],\n });\n\n const aiText = response.content\n .filter((b) => b.type === \"text\")\n .map((b) => b.text)\n .join(\"\\n\");\n\n console.log(\"Agent response:\", aiText.slice(0, 500));\n\n // Parse and apply edits\n const edits = parseEdits(aiText);\n const appliedEdits: string[] = [];\n\n for (const edit of edits) {\n try {\n await applyEdit(token, edit);\n appliedEdits.push(`✅ ${edit.action} ${edit.path}`);\n } catch (err) {\n appliedEdits.push(`❌ ${edit.action} ${edit.path}: ${err.message}`);\n }\n }\n\n // Update changelog\n if (appliedEdits.length > 0) {\n await appendChangelog(token, userMessage.slice(0, 100), appliedEdits);\n }\n\n // Archive\n await blob.setJSON(\n `self-improving-podcast/agent-runs/${new Date().toISOString()}.json`,\n {\n source: context || \"unknown\",\n message: userMessage,\n reply: aiText,\n edits: appliedEdits,\n timestamp: new Date().toISOString(),\n }\n );\n\n return { aiText, appliedEdits };\n}\n\nasync function fetchValFiles(token: string): Promise {\n // List all files (path= with empty string lists root)\n const res = await fetch(\n `https://api.val.town/v2/vals/${VAL_UUID}/files?path=`,\n { headers: { Authorization: `Bearer ${token}` } }\n );\n if (!res.ok) throw new Error(`Failed to list files: ${res.status} ${await res.text()}`);\n const data = await res.json();\n const files: FileInfo[] = [];\n\n for (const file of data.data || []) {\n if (file.type === \"directory\") continue;\n if (!file.path.endsWith(\".ts\") && !file.path.endsWith(\".md\")) continue;\n if (file.path.includes(\"debug\") || file.path.includes(\"check-episodes\")) continue;\n\n // Read content via esm.town module URL\n const moduleUrl = file.links?.module;\n if (!moduleUrl) continue;\n\n try {\n const contentRes = await fetch(moduleUrl);\n if (!contentRes.ok) continue;\n const content = await contentRes.text();\n files.push({ path: file.path, content });\n } catch {\n console.error(`Failed to read ${file.path}`);\n }\n }\n\n return files;\n}\n\nfunction buildSystemPrompt(files: FileInfo[], context?: string): string {\n const fileList = files\n .map((f) => `--- ${f.path} ---\\n${f.content}`)\n .join(\"\\n\\n\");\n\n return `You are an AI assistant that helps improve a Val Town project called \"self-improving-podcast\".\nThis val generates a daily podcast and serves it via RSS feed. It can be improved by user feedback.\n\n${context ? `Context: ${context}\\n\\n` : \"\"}\n\nHere are the current files in the val:\n\n${fileList}\n\nRULES:\n- If the user asks for a code change, output edit blocks (see format below).\n- If they're just chatting or asking a question, just respond naturally.\n- Keep changes minimal and focused.\n- Always explain what you're doing.\n- Never delete agent.ts or break the self-editing loop.\n- For podcast content changes (new data sources, topics), edit generate-podcast.ts.\n- For scheduling changes, edit generate-daily.ts.\n- For feed/player changes, edit feed.ts or podcast-player.ts.\n- Use free APIs that don't require API keys when possible (e.g. open-meteo.com for weather, not openweathermap).\n- The val runs on Deno, so use npm: prefix for npm packages.\n\nEDIT FORMAT:\nTo create or replace a file, use:\n<<>>\nfile content here\n<<>>\n\nTo create a new file:\n<<>>\nfile content here\n<<>>\n\nOnly output edit blocks if you're actually making changes.`;\n}\n\nfunction parseEdits(text: string): Edit[] {\n const edits: Edit[] = [];\n const regex =\n /<<>>\\n([\\s\\S]*?)<<>>/g;\n let match;\n while ((match = regex.exec(text)) !== null) {\n edits.push({ path: match[1], action: match[2], content: match[3].trim() });\n }\n return edits;\n}\n\nasync function applyEdit(token: string, edit: Edit) {\n const url = `https://api.val.town/v2/vals/${VAL_UUID}/files`;\n\n let res: Response;\n if (edit.action === \"create\") {\n res = await fetch(url, {\n method: \"POST\",\n headers: {\n Authorization: `Bearer ${token}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({\n path: edit.path,\n content: edit.content,\n type: \"script\",\n }),\n });\n } else {\n res = await fetch(`${url}?path=${encodeURIComponent(edit.path)}`, {\n method: \"PUT\",\n headers: {\n Authorization: `Bearer ${token}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({ content: edit.content }),\n });\n }\n\n if (!res.ok) {\n const body = await res.text();\n throw new Error(`API ${res.status}: ${body.slice(0, 200)}`);\n }\n\n console.log(`Edit applied: ${edit.action} ${edit.path}`);\n}\n\nasync function appendChangelog(token: string, request: string, edits: string[]) {\n const date = new Date().toISOString().split(\"T\")[0];\n const entry = `\\n## ${date} — via agent\\n- Request: \"${request}\"\\n${edits.map((e) => `- ${e}`).join(\"\\n\")}\\n`;\n\n try {\n const res = await fetch(\n `https://api.val.town/v2/vals/${VAL_UUID}/files?path=changelog.md`,\n { headers: { Authorization: `Bearer ${token}` } }\n );\n // Read existing content via module URL\n const data = await res.json();\n const moduleUrl = data.data?.[0]?.links?.module;\n let current = \"# Changelog\\n\";\n if (moduleUrl) {\n const contentRes = await fetch(moduleUrl);\n if (contentRes.ok) current = await contentRes.text();\n }\n\n const putRes = await fetch(\n `https://api.val.town/v2/vals/${VAL_UUID}/files?path=changelog.md`,\n {\n method: \"PUT\",\n headers: {\n Authorization: `Bearer ${token}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({ content: current + entry }),\n }\n );\n\n if (!putRes.ok) {\n console.error(\"Failed to update changelog:\", putRes.status);\n }\n } catch (err) {\n console.error(\"Changelog update error:\", err.message);\n }\n}\n","deleted","label",[102],"permalink","https://www.val.town/x/dcm31/self-improving-podcast/code/agent.ts","extension","actionData","errors"]