0hmX/am3352

scripts/shorten-ddr-dqs1.ts

/** Reuse the existing coupled-pair template to remove obsolete overlength tuning. */
import{readFileSync,writeFileSync,mkdirSync}from'node:fs'
import{resolve}from'node:path'
import{createHash}from'node:crypto'
import{auditCompositeHostTopology}from'./ddr-composite-routing-context'
import{fitDqsPairMean}from'./tune-ddr-dqs'
import{auditRouteAngles}from'./check-route-angles'
import{auditDdrTraceJunctions}from'./check-ddr-system-copper'
import{checkHostTerminalContract}from'./route-ddr-sequential'
import{objectHash}from'./improve-ddr-a9-power-launches'
import{verifyDdrCapture}from'./ddr-capture-provenance'
const[capture,parent,out,targetArg='27']=process.argv.slice(2);if(!out)throw Error('Usage: capture current-parent output [byte1-target-mm=27]')
const inputHashes:Record<string,string>={},fh=(p:string)=>createHash('sha256').update(readFileSync(p)).digest('hex'),read=(p:string)=>{p=resolve(p);inputHashes[p]=fh(p);return JSON.parse(readFileSync(p,'utf8'))}
const{captureHash}=verifyDdrCapture(capture),candidate0=read(resolve(parent,'candidate.circuit.json')),host0=read(resolve(parent,'host-bundle.json')),input=read(resolve(parent,'routing-input.json')),prior=read(resolve(parent,'report.json')),target=Number(targetArg),nominalMm=27.3001
if(!Number.isFinite(target)||target<=0||target>nominalMm-.05||prior.candidateCircuitSha256!==objectHash(candidate0)||host0.captureHash!==captureHash)throw Error('Invalid parent or byte1 target')
const hostIds=new Set(host0.traces.map((t:any)=>t.pcb_trace_id)),c={candidate:candidate0,host:host0,input,fixed:candidate0.filter((e:any)=>!hostIds.has(e.pcb_trace_id)),evidence:{captureHash,inputHashes},assertUnchanged:()=>{verifyDdrCapture(capture);for(const[p,h]of Object.entries(inputHashes))if(fh(p)!==h)throw Error('Input changed')}}
if(host0.traces.some((t:any)=>objectHash(t)!==objectHash(candidate0.find((e:any)=>e.type==='pcb_trace'&&e.pcb_trace_id===t.pcb_trace_id))))throw Error('Host bundle differs from candidate')
const connections=c.input.connections.filter((x:any)=>x.ramByte===1&&['DQS_P','DQS_N'].includes(x.ramTerminal)),old=c.host.traces.filter((t:any)=>connections.some((x:any)=>x.name===t.connection_name)),oldIds=new Set(old.map((t:any)=>t.pcb_trace_id))
if(old.length!==2||connections.length!==2)throw Error('Missing original pair')
const planar=(route:any[])=>route.reduce((sum:number,b:any,i:number)=>{const a=route[i-1];return sum+(a?.route_type==='wire'&&b.route_type==='wire'&&a.layer===b.layer?Math.hypot(b.x-a.x,b.y-a.y):0)},0)
const escapeLengths=connections.map((x:any)=>x.pointsToConnect.reduce((sum:number,p:any)=>{const e=c.candidate.find((e:any)=>e.pcb_breakout_point_id===p.pointId),trace=c.candidate.find((t:any)=>t.type==='pcb_trace'&&t.source_trace_id===e.source_trace_id&&t.route.at(-1)?.layer===p.layer&&Math.hypot(t.route.at(-1).x-p.x,t.route.at(-1).y-p.y)<1e-7);if(!trace)throw Error('Missing actual saved escape');return sum+planar(trace.route)},0))
const auditPath=resolve('/Users/ankan/Documents/Codex/2026-09-10/what-x20/outputs/mt41k512m8da-107-it-p-fanout/scripts/audit-am3352-dqs-pair.ts'),fileHash=()=>createHash('sha256').update(readFileSync(auditPath)).digest('hex'),auditHash=fileHash(),{verifyHostDqsPair}=await import(auditPath)
mkdirSync(out,{recursive:true});const write=(n:string,v:any)=>writeFileSync(resolve(out,n),JSON.stringify(v,null,2)+'\n'),attempts:any[]=[];let chosen:any
for(const entryX of[1.9,1.7,1.5]){
 const fitted=fitDqsPairMean(connections,escapeLengths,target,entryX,9.6),y=fitted.excursionY,raw=fitted.traces
 const traces=raw.map((t:any)=>{const before=old.find((e:any)=>e.pcb_trace_id===t.pcb_trace_id);if(!before||objectHash(before.route[0])!==objectHash(t.route[0])||objectHash(before.route.at(-1))!==objectHash(t.route.at(-1)))throw Error('Pair endpoint or identity changed');return{...before,route:t.route}}),candidate=c.candidate.map((e:any)=>traces.find((t:any)=>t.pcb_trace_id===e.pcb_trace_id)??e),host={...c.host,traces:c.host.traces.map((e:any)=>traces.find((t:any)=>t.pcb_trace_id===e.pcb_trace_id)??e)}
 if(traces.some((t:any)=>!oldIds.has(t.pcb_trace_id)))throw Error('Pair IDs changed')
 const lengths=traces.map((t:any,i:number)=>planar(t.route)+escapeLengths[i]),actualMean=lengths.reduce((a:number,b:number)=>a+b,0)/2,topology=auditCompositeHostTopology(candidate,host.traces,c.input.connections),allAngles=auditRouteAngles(candidate.filter((e:any)=>e.type==='pcb_trace')),allJunctions=auditDdrTraceJunctions(candidate,c.input.connections),terminal=checkHostTerminalContract(host.traces,c.input.connections.filter((x:any)=>host.traces.some((t:any)=>t.connection_name===x.name))),pair=verifyHostDqsPair({...c.input,connections},c.fixed,traces)
 const ok=topology.valid&&allAngles.valid&&allJunctions.valid&&terminal.valid&&pair.status==='pair-geometry-pass'&&Math.abs(actualMean-target)<1e-6&&lengths.every((n:number)=>n<nominalMm)&&topology.physical.connectivity.filter((x:any)=>x.connected).length===c.host.traces.length
 const summary={entryX,excursionY:y,accepted:ok,targetMm:target,lengthsMm:lengths,meanMm:actualMean,topologyErrors:topology.errors,physicalErrors:topology.physical.errors,violations:topology.physical.violations,angles:allAngles.violations,junctions:allJunctions.joinedBends,pair,terminal};attempts.push(summary)
 if(ok){chosen={candidate,host,traces,topology,allAngles,allJunctions,terminal,summary};break}
}
c.assertUnchanged();if(fileHash()!==auditHash)throw Error('Pair auditor changed')
write('report.json',{captureHash,accepted:!!chosen,nominalMm,targetMm:target,inputHashes,parentCandidateSha256:objectHash(c.candidate),contextEvidence:c.evidence,externalPairAuditorSha256:auditHash,attempts,scope:'Coupled DQS1 shortening below byte1 nominal maximum; byte1 data matching remains outstanding. Complete byte timing remains invalid due to other overlong/short/missing data routes.'})
if(chosen){write('candidate.circuit.json',chosen.candidate);write('host-bundle.json',chosen.host);write('replacements.json',old.map((before:any)=>({before,after:chosen.traces.find((t:any)=>t.pcb_trace_id===before.pcb_trace_id)})));write('physical-report.json',chosen.topology);write('routing-input.json',{...c.input,obstacles:undefined,traces:chosen.host.traces});}
console.log(JSON.stringify({accepted:!!chosen,attempts:attempts.map(a=>({entryX:a.entryX,y:a.excursionY,lengths:a.lengthsMm,errors:a.physicalErrors.length,violations:a.violations.length,topology:a.topologyErrors.length,pair:a.pair.status}))}));if(!chosen)process.exitCode=1