diff --git a/scripts/src/hwlab-node-impl.ts b/scripts/src/hwlab-node-impl.ts
index aae589e3..24f2c916 100644
--- a/scripts/src/hwlab-node-impl.ts
+++ b/scripts/src/hwlab-node-impl.ts
@@ -7093,7 +7093,7 @@ const node=process.argv[2];
 const lane=process.argv[3];
 const tailN=${tailLines};
 const readJson=(name)=>{try{return JSON.parse(fs.readFileSync(path.join(dir,name),'utf8'))}catch{return null}};
-const tailJsonl=(name)=>{try{return fs.readFileSync(path.join(dir,name),'utf8').trim().split(/\\r?\\n/).filter(Boolean).slice(-tailN).map(line=>{try{return JSON.parse(line)}catch{return {parseError:true, rawTail:line.slice(-500)}}})}catch{return []}};
+const tailJsonl=(name)=>{try{const file=path.join(dir,name); const st=fs.statSync(file); const maxBytes=Math.min(st.size,8*1024*1024); const fd=fs.openSync(file,'r'); try{const buf=Buffer.alloc(maxBytes); fs.readSync(fd,buf,0,maxBytes,st.size-maxBytes); const lines=buf.toString('utf8').split(/\\r?\\n/).filter(Boolean); if(st.size>maxBytes&&lines.length>0) lines.shift(); return lines.slice(-tailN).map(line=>{try{return JSON.parse(line)}catch{return {parseError:true, rawTail:line.slice(-500)}}});}finally{fs.closeSync(fd)}}catch{return []}};
 const short=(value)=>String(value||'').slice(0,160);
 const compactManifest=(item)=>item?{jobId:item.jobId,status:item.status,specRef:item.specRef,baseUrl:item.baseUrl,targetPath:item.targetPath,pageAuthority:item.pageAuthority,sampling:item.sampling,safety:item.safety,startedAt:item.startedAt,completedAt:item.completedAt}:null;
 const compactControl=(item)=>({ts:item.ts,seq:item.seq,phase:item.phase,type:item.type,commandId:item.commandId,source:item.source,input:item.input,afterUrl:item.afterUrl,detail:item.detail&&typeof item.detail==='object'?{reason:item.detail.reason||null,mark:item.detail.mark||null,stopping:item.detail.stopping===true,pageId:item.detail.pageId||null}:null});