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Response.json(body,{status})}\nfunction now(){return new Date().toISOString()}\n\nfunction extractItems(xml:string):Array<{title:string,url:string,date:string}>{\n const items:Array<{title:string,url:string,date:string}>=[];\n const blocks=xml.split(/<(?:item|entry)[ >]/).slice(1);\n for(const b of blocks){\n const end=b.search(/<\\/(?:item|entry)>/);\n const body=end>=0?b.slice(0,end):b;\n const t=(re:RegExp)=>{const m=body.match(re);return m?m[1].replace(//g,\"\").trim():\"\"};\n const title=t(/(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/title>/s);\n const linkM=body.match(/<link[^>]*href=\"([^\"]+)\"/)||body.match(/<link>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/link>/);\n const url=linkM?linkM[1].trim():\"\";\n const date=t(/<pubDate>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/pubDate>/)||t(/<published>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/published>/)||t(/<updated>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/updated>/);\n if(title&&url){items.push({title,url,date});if(items.length>=25)break}\n }\n return items;\n}\n\nlet cycleLock=0;\nexport async function runCycle():Promise<any>{\n if(Date.now()-cycleLock<120000)return {ok:false,skipped:true,reason:\"CYCLE_TOO_FREQUENT\"};\n cycleLock=Date.now();\n const ledger:any=await blob.getJSON(\"state/ledger.json\");\n const L=ledger&&ledger.items?ledger:{items:[],cycles:[]};\n const seen=new Set(L.items.map((x:any)=>x.item_url+\"|\"+x.item_title));\n const sourceReports:any[]=[];const newSignals:any[]=[];\n for(const s of SOURCES){\n let rep:any;\n try{\n const ctl=new AbortController();const to=setTimeout(()=>ctl.abort(),20000);\n const res=await fetch(s.url,{signal:ctl.signal,headers:{\"user-agent\":\"autonomous-frontier-signal/1.0 (public autonomous signal agent)\"}});\n clearTimeout(to);\n if(!res.ok)throw new Error(\"HTTP_\"+String(res.status));\n const raw=await res.text();\n const rawSha=await sha(raw.slice(0,200000));\n const items=extractItems(raw);\n if(!items.length)throw new Error(\"NO_ITEMS_PARSED\");\n let n=0;\n for(const it of items){\n const key=it.url+\"|\"+it.title;\n if(seen.has(key))continue;\n seen.add(key);n++;\n newSignals.push({id:\"sig-\"+(await sha(key+\"|\"+(it.date||\"\"))).slice(0,16),source:s.name,source_url:s.url,item_title:it.title,item_url:it.url,item_date:it.date||null,fetched_at:now(),raw_sha256:rawSha});\n }\n rep={name:s.name,url:s.url,ok:true,items_total:items.length,items_new:n};\n }catch(e:any){\n rep={name:s.name,url:s.url,ok:false,error:e&&e.message?e.message:String(e)};\n }\n sourceReports.push(rep);\n }\n const cycle={n:(L.cycles.length||0)+1,at:now(),sources_ok:sourceReports.filter((x:any)=>x.ok).length,sources_failed:sourceReports.filter((x:any)=>!x.ok).length,new_signals:newSignals.length,duration_ms:Date.now()-(cycleLock-0)};\n for(const sig of newSignals)L.items.push(sig);\n if(L.items.length>2000)L.items=L.items.slice(-2000);\n L.cycles=[...(L.cycles||[]),cycle].slice(-200);\n L.updated_at=now();\n await blob.setJSON(\"state/ledger.json\",L);\n const digest={schema:\"AUTONOMOUS_FRONTIER_SIGNAL_DIGEST_V1\",generated_at:now(),cycle:cycle.n,total_signals:L.items.length,latest_signals:newSignals.slice(0,20),source_status:sourceReports,recent_cycles:(L.cycles||[]).slice(-5)};\n await blob.setJSON(\"state/digest.json\",digest);\n return {ok:sourceReports.some((x:any)=>x.ok),schema:\"AUTONOMOUS_FRONTIER_SIGNAL_CYCLE_V1\",cycle,sources:sourceReports,new_signal_count:newSignals.length};\n}\n\nexport async function handle(req:Request):Promise<Response>{\n const u=new URL(req.url),p=u.pathname;\n if(req.method===\"POST\"&&p===\"/cycle\")return J(await runCycle());\n if(p===\"/\"||p===\"/digest\"){\n const d:any=await blob.getJSON(\"state/digest.json\");\n if(!d)return J({ok:false,error:\"NO_DIGEST_YET\",hint:\"POST /cycle to run the first cycle\"},404);\n return J({ok:true,...d});\n }\n if(p===\"/feed\"){\n const l:any=await blob.getJSON(\"state/ledger.json\");\n if(!l)return J({ok:false,error:\"NO_LEDGER_YET\"},404);\n return J({ok:true,total:(l.items||[]).length,items:(l.items||[]).slice(-100).reverse(),cycles:(l.cycles||[]).slice(-20)});\n }\n if(p===\"/health\"){\n const l:any=await blob.getJSON(\"state/ledger.json\");const d:any=await blob.getJSON(\"state/digest.json\");\n return J({ok:true,schema:\"AUTONOMOUS_FRONTIER_SIGNAL_HEALTH_V1\",autonomous:true,device_dependent:false,schedule:\"interval 15m + manual POST /cycle\",last_cycle_at:d?d.generated_at:null,last_cycle_n:d?d.cycle:null,total_signals:l&&l.items?l.items.length:0,source_status:d?d.source_status:[]});\n }\n return J({ok:true,schema:\"AUTONOMOUS_FRONTIER_SIGNAL_V1\",autonomous_long_running:true,endpoints:[\"GET /\",\"GET /feed\",\"GET /health\",\"POST /cycle\"]});\n}\nexport default handle;\n","/* AUTONOMOUS AI FRONTIER SIGNAL V1 — long-running autonomous agent.\n Every cycle: fetch live public sources (RSS/Atom), verify each item\n (title + url + date + raw-content hash), diff against the persistent\n ledger, publish a digest. Public, non-scored, $0.\n Autonomy: interval-driven (15m) + manual POST /cycle.\n Fail-closed: per-source fetch/parse failures are reported, never fatal.\n*/\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst SOURCES = [\n {name:\"arxiv-cs-ai\", url:\"https://rss.arxiv.org/rss/cs.AI\"},\n {name:\"huggingface-blog\", url:\"https://huggingface.co/blog/feed.xml\"},\n {name:\"simonwillison-ai\", url:\"https://simonwillison.net/atom/everything/\"},\n {name:\"techreview-ai\", url:\"https://www.technologyreview.com/topic/artificial-intelligence/feed\"},\n {name:\"openai-blog\", url:\"https://openai.com/blog/rss.xml\"},\n {name:\"google-ai-blog\", url:\"https://blog.google/technology/ai/rss/\"}\n];\n\nconst enc = new TextEncoder();\nasync function sha(s:string){const d=await crypto.subtle.digest(\"SHA-256\",enc.encode(s));return [...new Uint8Array(d)].map(x=>x.toString(16).padStart(2,\"0\")).join(\"\")}\nfunction J(body:any,status=200){return Response.json(body,{status})}\nfunction now(){return new Date().toISOString()}\n\nfunction extractItems(xml:string):Array<{title:string,url:string,date:string}>{\n const items:Array<{title:string,url:string,date:string}>=[];\n const blocks=xml.split(/<(?:item|entry)[ >]/).slice(1);\n for(const b of blocks){\n const end=b.search(/<\\/(?:item|entry)>/);\n const body=end>=0?b.slice(0,end):b;\n const t=(re:RegExp)=>{const m=body.match(re);return m?m[1].replace(/<!\\[CDATA\\[|\\]\\]>/g,\"\").trim():\"\"};\n const title=t(/<title>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/title>/s);\n const linkM=body.match(/<link[^>]*href=\"([^\"]+)\"/)||body.match(/<link>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/link>/);\n const url=linkM?linkM[1].trim():\"\";\n const date=t(/<pubDate>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/pubDate>/)||t(/<published>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/published>/)||t(/<updated>(?:<!\\[CDATA\\[)?(.*?)(?:\\]\\]>)?<\\/updated>/);\n if(title&&url){items.push({title,url,date});if(items.length>=25)break}\n }\n return items;\n}\n\nlet cycleLock=0;\nexport async function runCycle():Promise<any>{\n if(Date.now()-cycleLock<120000)return {ok:false,skipped:true,reason:\"CYCLE_TOO_FREQUENT\"};\n cycleLock=Date.now();\n const ledger:any=await blob.getJSON(\"state/ledger.json\");\n const L=ledger&&ledger.items?ledger:{items:[],cycles:[]};\n const seen=new Set(L.items.map((x:any)=>x.item_url+\"|\"+x.item_title));\n const sourceReports:any[]=[];const newSignals:any[]=[];\n for(const s of SOURCES){\n let rep:any;\n try{\n const ctl=new AbortController();const to=setTimeout(()=>ctl.abort(),20000);\n const res=await fetch(s.url,{signal:ctl.signal,headers:{\"user-agent\":\"autonomous-frontier-signal/1.0 (public autonomous signal agent)\"}});\n clearTimeout(to);\n if(!res.ok)throw new Error(\"HTTP_\"+String(res.status));\n const raw=await res.text();\n const rawSha=await sha(raw.slice(0,200000));\n const items=extractItems(raw);\n if(!items.length){\n if(/<(?:rss|feed)[ >]/.test(raw)){rep={name:s.name,url:s.url,ok:true,items_total:0,items_new:0,note:\"EMPTY_FEED_VALID\"};sourceReports.push(rep);continue}\n throw new Error(\"NO_ITEMS_PARSED\");\n }\n let n=0;\n for(const it of items){\n const key=it.url+\"|\"+it.title;\n if(seen.has(key))continue;\n seen.add(key);n++;\n newSignals.push({id:\"sig-\"+(await sha(key+\"|\"+(it.date||\"\"))).slice(0,16),source:s.name,source_url:s.url,item_title:it.title,item_url:it.url,item_date:it.date||null,fetched_at:now(),raw_sha256:rawSha});\n }\n rep={name:s.name,url:s.url,ok:true,items_total:items.length,items_new:n};\n }catch(e:any){\n rep={name:s.name,url:s.url,ok:false,error:e&&e.message?e.message:String(e)};\n }\n sourceReports.push(rep);\n }\n const cycle={n:(L.cycles.length||0)+1,at:now(),sources_ok:sourceReports.filter((x:any)=>x.ok).length,sources_failed:sourceReports.filter((x:any)=>!x.ok).length,new_signals:newSignals.length,duration_ms:Date.now()-(cycleLock-0)};\n for(const sig of newSignals)L.items.push(sig);\n if(L.items.length>2000)L.items=L.items.slice(-2000);\n L.cycles=[...(L.cycles||[]),cycle].slice(-200);\n L.updated_at=now();\n await blob.setJSON(\"state/ledger.json\",L);\n const digest={schema:\"AUTONOMOUS_FRONTIER_SIGNAL_DIGEST_V1\",generated_at:now(),cycle:cycle.n,total_signals:L.items.length,latest_signals:newSignals.slice(0,20),source_status:sourceReports,recent_cycles:(L.cycles||[]).slice(-5)};\n await blob.setJSON(\"state/digest.json\",digest);\n return {ok:sourceReports.some((x:any)=>x.ok),schema:\"AUTONOMOUS_FRONTIER_SIGNAL_CYCLE_V1\",cycle,sources:sourceReports,new_signal_count:newSignals.length};\n}\n\nexport async function handle(req:Request):Promise<Response>{\n const u=new URL(req.url),p=u.pathname;\n if(req.method===\"POST\"&&p===\"/cycle\")return J(await runCycle());\n if(p===\"/\"||p===\"/digest\"){\n const d:any=await blob.getJSON(\"state/digest.json\");\n if(!d)return J({ok:false,error:\"NO_DIGEST_YET\",hint:\"POST /cycle to run the first cycle\"},404);\n return J({ok:true,...d});\n }\n if(p===\"/feed\"){\n const l:any=await blob.getJSON(\"state/ledger.json\");\n if(!l)return J({ok:false,error:\"NO_LEDGER_YET\"},404);\n return J({ok:true,total:(l.items||[]).length,items:(l.items||[]).slice(-100).reverse(),cycles:(l.cycles||[]).slice(-20)});\n }\n if(p===\"/health\"){\n const l:any=await blob.getJSON(\"state/ledger.json\");const d:any=await blob.getJSON(\"state/digest.json\");\n return J({ok:true,schema:\"AUTONOMOUS_FRONTIER_SIGNAL_HEALTH_V1\",autonomous:true,device_dependent:false,schedule:\"interval 15m + manual POST /cycle\",last_cycle_at:d?d.generated_at:null,last_cycle_n:d?d.cycle:null,total_signals:l&&l.items?l.items.length:0,source_status:d?d.source_status:[]});\n }\n return J({ok:true,schema:\"AUTONOMOUS_FRONTIER_SIGNAL_V1\",autonomous_long_running:true,endpoints:[\"GET /\",\"GET /feed\",\"GET /health\",\"POST /cycle\"]});\n}\nexport default 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Diff · v3