Accept a KiCad project drop so hierarchical sheets and the board upload in one step.

A single .kicad_sch was parsed in isolation, so child sheets looked like an empty netlist. Report 404s now surface the real API error instead of a generic fetch failure.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/pinscopex/netlist_bundle.py

@@ -0,0 +1,233 @@
+"""Unpack a netlist upload: one file, several KiCad sheets, or a zip.
+
+The hierarchical ``.kicad_sch`` parser needs sibling files on disk. A single
+temp file named ``tmpXXXX.kicad_sch`` cannot see ``Sheetfile`` children.
+"""
+
+from __future__ import annotations
+
+import io
+import zipfile
+from dataclasses import dataclass
+from pathlib import Path
+
+from backend.pinscopex.parsers import detect_netlist_format
+
+MAX_BUNDLE_BYTES = 30 * 1024 * 1024
+_MAX_ZIP_MEMBERS = 400
+
+_KIND = str  # pads | edif | kicad_* | zip | kicad_pcb | unknown
+
+
+@dataclass
+class NetlistUpload:
+    root: Path
+    work_dir: Path
+    pcb: Path | None
+    extra_sch: list[Path]
+
+
+def sniff_netlist_kind(content: bytes) -> str:
+    if content[:2] == b"PK":
+        return "zip"
+    head = content[:2048].decode("utf-8", errors="replace").lstrip("\ufeff").lstrip()
+    low = head[:40].lower()
+    if low.startswith("(kicad_pcb"):
+        return "kicad_pcb"
+    if low.startswith("(kicad_sch"):
+        return "kicad_sch"
+    if low.startswith("(edif"):
+        return "edif"
+    if low.startswith("(export"):
+        return "kicad_sexp"
+    if low.startswith("<?xml") or low.startswith("<export"):
+        return "kicad_xml"
+    if "*PADS-PCB*" in head.upper() or head.lstrip().startswith("*PART*"):
+        return "pads"
+    return "unknown"
+
+
+def _safe_rel(name: str) -> str:
+    rel = name.replace("\\", "/").strip()
+    if not rel or rel.startswith("/") or rel.startswith("\\"):
+        raise ValueError(f"Rejected path: {name}")
+    parts = Path(rel).parts
+    if ".." in parts or (parts and parts[0] == ".."):
+        raise ValueError(f"Rejected path: {name}")
+    return rel
+
+
+_KEEP_SUFFIX = {
+    ".kicad_sch",
+    ".kicad_pcb",
+    ".kicad_pro",
+    ".kicad_net",
+    ".xml",
+    ".edn",
+    ".edif",
+    ".edf",
+    ".asc",
+    ".net",
+}
+
+
+def _keep_zip_member(rel: str) -> bool:
+    parts = Path(rel).parts
+    if any(
+        p.endswith("-backups") or p.endswith(".pretty") or p.lower() in {"3dmodels", "__macosx"}
+        for p in parts
+    ):
+        return False
+    return Path(rel).suffix.lower() in _KEEP_SUFFIX
+
+
+def _extract_zip(data: bytes, dest: Path) -> None:
+    dest.mkdir(parents=True, exist_ok=True)
+    total = 0
+    kept = 0
+    with zipfile.ZipFile(io.BytesIO(data)) as zf:
+        for info in zf.infolist():
+            if info.is_dir():
+                continue
+            rel = _safe_rel(info.filename)
+            if not _keep_zip_member(rel):
+                continue
+            kept += 1
+            if kept > _MAX_ZIP_MEMBERS:
+                raise ValueError("Zip has too many schematic files")
+            total += max(info.file_size, 0)
+            if total > MAX_BUNDLE_BYTES:
+                raise ValueError("Zip is too large")
+            out = dest / rel
+            out.parent.mkdir(parents=True, exist_ok=True)
+            with zf.open(info) as src:
+                payload = src.read()
+            if len(payload) > MAX_BUNDLE_BYTES:
+                raise ValueError("Zip member is too large")
+            out.write_bytes(payload)
+
+
+def _write_named(name: str, data: bytes, dest: Path) -> None:
+    rel = _safe_rel(name)
+    kind = sniff_netlist_kind(data)
+    if kind == "zip":
+        _extract_zip(data, dest)
+        return
+    out = dest / Path(rel).name
+    # Keep a single subdirectory when the client sent webkitRelativePath.
+    if "/" in rel:
+        out = dest / rel
+        out.parent.mkdir(parents=True, exist_ok=True)
+    else:
+        dest.mkdir(parents=True, exist_ok=True)
+    out.write_bytes(data)
+
+
+def find_kicad_pcb(work: Path) -> Path | None:
+    hits = sorted(p for p in work.rglob("*.kicad_pcb") if p.is_file())
+    return hits[0] if hits else None
+
+
+def _sheetfiles_of(path: Path) -> list[str]:
+    from backend.pinscopex.parsers_kicad import _parse_sexp, _sheetfiles, _tag
+
+    text = path.read_text(encoding="utf-8", errors="replace")
+    tree = _parse_sexp(text)
+    if _tag(tree) != "kicad_sch":
+        return []
+    return _sheetfiles(tree)
+
+
+def _pick_root(work: Path) -> Path:
+    schs: list[Path] = []
+    exported: list[Path] = []
+    for p in work.rglob("*"):
+        if not p.is_file():
+            continue
+        kind = sniff_netlist_kind(p.read_bytes()[:2048])
+        if kind == "kicad_sch":
+            schs.append(p)
+        elif kind in ("kicad_xml", "kicad_sexp", "edif", "pads"):
+            exported.append(p)
+
+    if exported:
+        pref = [
+            p for p in exported
+            if sniff_netlist_kind(p.read_bytes()[:2048]) in (
+                "kicad_xml", "kicad_sexp", "edif",
+            )
+        ]
+        return (pref or exported)[0]
+
+    if not schs:
+        raise ValueError(
+            "No schematic found. Drop the KiCad project folder or a netlist."
+        )
+
+    referenced: set[Path] = set()
+    for p in schs:
+        for rel in _sheetfiles_of(p):
+            try:
+                child = (p.parent / rel.replace("\\", "/")).resolve()
+            except ValueError:
+                continue
+            referenced.add(child)
+    roots = [p for p in schs if p.resolve() not in referenced]
+    if not roots:
+        raise ValueError("Cyclic sheet includes — upload an exported KiCad netlist instead.")
+
+    pro = list(work.rglob("*.kicad_pro"))
+    if len(roots) > 1 and pro:
+        stems = {p.stem for p in pro}
+        matched = [r for r in roots if r.stem in stems]
+        if len(matched) == 1:
+            return matched[0]
+    if len(roots) > 1:
+        names = ", ".join(sorted(r.name for r in roots))
+        raise ValueError(
+            f"Multiple root sheets ({names}). Upload a zip of the project, "
+            "or the top-level .kicad_sch together with every Sheetfile child."
+        )
+    return roots[0]
+
+
+def materialize_netlist_upload(
+    files: list[tuple[str, bytes]],
+    dest: Path,
+) -> NetlistUpload:
+    """Write uploaded bytes into ``dest`` and return the file to parse."""
+    if not files:
+        raise ValueError("No netlist file uploaded")
+    dest.mkdir(parents=True, exist_ok=True)
+    total = sum(len(b) for _n, b in files)
+    if total > MAX_BUNDLE_BYTES:
+        raise ValueError("Upload is too large")
+
+    if len(files) == 1:
+        name, data = files[0]
+        kind = sniff_netlist_kind(data)
+        if kind == "kicad_pcb":
+            raise ValueError(
+                "This is a board file. Drop the KiCad project folder, or put "
+                "the .kicad_pcb on the optional board step."
+            )
+        if kind == "unknown" and not name.lower().endswith(".zip"):
+            raise ValueError(
+                "Not a netlist. Drop the KiCad project folder, a zip, or a "
+                "PADS / EDIF / KiCad netlist."
+            )
+
+    for name, data in files:
+        _write_named(name, data, dest)
+
+    root = _pick_root(dest)
+    pcb = find_kicad_pcb(dest)
+    extras = [
+        p for p in work_sch_files(dest)
+        if p.resolve() != root.resolve()
+    ]
+    return NetlistUpload(root=root, work_dir=dest, pcb=pcb, extra_sch=extras)
+
+
+def work_sch_files(dest: Path) -> list[Path]:
+    return sorted(p for p in dest.rglob("*.kicad_sch") if p.is_file())

backend/pinscopex/parsers_kicad.py

@@ -556,7 +556,10 @@ def parse_kicad_sch_project(
         if path in seen:
             raise ValueError(f"Cyclic sheet include: {path.name}")
         if not path.is_file():
-            raise ValueError(f"Missing sheet file: {path.name}")
+            raise ValueError(
+                f"Missing sheet file: {path.name}. Drop the whole KiCad "
+                "project folder, not a single sheet."
+            )
         seen.add(path)
         text = path.read_text(encoding="utf-8", errors="replace")
         tree = _parse_sexp(text)

backend/routers/projects.py

@@ -1,7 +1,10 @@
 """Project CRUD and file upload endpoints."""
 
+import json
+from pathlib import Path
+
 import httpx
-from fastapi import APIRouter, HTTPException, Request, UploadFile
+from fastapi import APIRouter, File, Form, HTTPException, Request, UploadFile
 from fastapi.responses import JSONResponse, Response
 from pydantic import BaseModel
 
@@ -462,51 +465,80 @@ async def upload_bom(
 
 
 @router.post("/projects/{project_id}/upload/netlist")
-async def upload_netlist(project_id: str, file: UploadFile, request: Request):
+async def upload_netlist(
+    project_id: str,
+    request: Request,
+    file: UploadFile | None = File(default=None),
+    files: list[UploadFile] | None = File(default=None),
+    paths: str | None = Form(default=None),
+):
     storage = get_storage(request)
     result = proj_svc.resolve_project_access(storage, get_user_id(request), project_id)
     if not result:
         raise HTTPException(404, "Project not found")
     user_id = result[0]  # owner_user_id for storage paths
-    data = await file.read()
-    if len(data) > MAX_UPLOAD_BYTES:
-        raise HTTPException(413, f"File too large (max {MAX_UPLOAD_BYTES // 1024 // 1024} MB)")
 
-    # Auto-detect PADS vs EDIF from the file's first bytes — users don't pick
-    # a format, the wizard accepts either.
-    from backend.pinscopex.parsers import (
-        detect_netlist_format, parse_netlist_any, validate_netlist,
-    )
+    from backend.pinscopex.netlist_bundle import materialize_netlist_upload
+    from backend.pinscopex.parsers import parse_netlist_any, validate_netlist
     from backend.pinscopex.parsers_edif import list_edif_subdesigns
-    import tempfile, os
+    import tempfile
+
+    blobs: list[tuple[str, bytes]] = []
+    seen: set[tuple[str, int]] = set()
+    uploads = list(files or []) if files else ([file] if file is not None else [])
+    rels: list[str] | None = None
+    if paths:
+        try:
+            parsed_paths = json.loads(paths)
+        except json.JSONDecodeError:
+            parsed_paths = None
+        if isinstance(parsed_paths, list) and all(isinstance(x, str) for x in parsed_paths):
+            rels = parsed_paths
+    for i, uf in enumerate(uploads):
+        data = await uf.read()
+        if len(data) > MAX_UPLOAD_BYTES:
+            raise HTTPException(
+                413,
+                f"File too large (max {MAX_UPLOAD_BYTES // 1024 // 1024} MB)",
+            )
+        name = (
+            rels[i]
+            if rels is not None and i < len(rels)
+            else (uf.filename or "netlist")
+        )
+        mark = (name, len(data))
+        if mark in seen:
+            continue
+        seen.add(mark)
+        blobs.append((name, data))
+    if not blobs:
+        raise HTTPException(400, "No netlist file uploaded")
 
-    fmt = detect_netlist_format(data)
-    suffix = {
-        "edif": ".edn",
-        "kicad_xml": ".xml",
-        "kicad_sexp": ".kicad_net",
-        "kicad_sch": ".kicad_sch",
-    }.get(fmt, ".asc")
     sub_designs: list[dict] = []
     try:
-        tmp = tempfile.NamedTemporaryFile(delete=False, suffix=suffix)
-        tmp.write(data)
-        tmp.close()
-        parts, nets, _ = parse_netlist_any(tmp.name)
-        # For EDIF, also surface the sub-design layout so the wizard can
-        # decide whether to prompt the user. Cheap second parse — same file.
+        with tempfile.TemporaryDirectory() as tmp:
+            parsed = materialize_netlist_upload(blobs, Path(tmp) / "work")
+            parts, nets, fmt = parse_netlist_any(parsed.root)
             if fmt == "edif":
-            sub_designs = list_edif_subdesigns(tmp.name)
-        os.unlink(tmp.name)
-    except Exception as e:
-        raise HTTPException(400, f"Invalid netlist: {e}")
+                sub_designs = list_edif_subdesigns(parsed.root)
             issues = validate_netlist(parts, nets)
             if issues:
-        raise HTTPException(400, f"Netlist failed sanity check: {'; '.join(issues)}")
-    key = proj_svc.save_netlist(storage, user_id, project_id, data, fmt=fmt)
-    # EDIF: emit a designator→pins preview matching the PADS browser-side
-    # shape, so the wizard's power-sources step can render its dropdowns
-    # without re-parsing the (s-expression-heavy) file in the browser.
+                raise ValueError("; ".join(issues))
+            root_bytes = parsed.root.read_bytes()
+            key = proj_svc.save_netlist(storage, user_id, project_id, root_bytes, fmt=fmt)
+            if fmt == "kicad_sch":
+                proj_svc.save_companion_sheets(
+                    storage, user_id, project_id, parsed.root, parsed.extra_sch,
+                )
+            else:
+                proj_svc.clear_companion_sheets(storage, user_id, project_id)
+            if parsed.pcb is not None:
+                proj_svc.save_pcb(storage, user_id, project_id, parsed.pcb.read_bytes())
+    except HTTPException:
+        raise
+    except Exception as e:
+        raise HTTPException(400, f"Netlist failed sanity check: {e}") from e
+
     designator_pins: list[dict] = []
     if fmt != "pads":
         designator_pins = _build_designator_pins(parts, nets)

backend/services/projects.py

@@ -26,6 +26,7 @@ from __future__ import annotations
 import logging
 import uuid
 from datetime import datetime, timezone
+from pathlib import Path
 from typing import Any
 
 log = logging.getLogger(__name__)
@@ -663,6 +664,34 @@ def save_netlist(
     return key
 
 
+def clear_companion_sheets(
+    storage: StorageBackend, user_id: str, project_id: str,
+) -> None:
+    prefix = f"{_project_prefix(user_id, project_id)}/uploads/"
+    for key in storage.list_recursive(prefix):
+        rel = key[len(prefix):]
+        if rel.endswith(".kicad_sch") and rel != "netlist.kicad_sch":
+            storage.delete_key(key)
+
+
+def save_companion_sheets(
+    storage: StorageBackend,
+    user_id: str,
+    project_id: str,
+    root: Path,
+    extras: list[Path],
+) -> None:
+    """Keep Sheetfile children next to ``uploads/netlist.kicad_sch``."""
+    clear_companion_sheets(storage, user_id, project_id)
+    parent = root.parent
+    prefix = f"{_project_prefix(user_id, project_id)}/uploads/"
+    for extra in extras:
+        rel = extra.relative_to(parent).as_posix()
+        if rel == "netlist.kicad_sch":
+            continue
+        storage.write_bytes(prefix + rel, extra.read_bytes())
+
+
 def save_pcb(
     storage: StorageBackend, user_id: str, project_id: str, data: bytes
 ) -> str:

frontend/content/changelog.md

@@ -2,6 +2,14 @@
 
 What's new in Pinscope.
 
+## 2.26.1 — 2026-09-11 — Ask for the KiCad board
+
+The create-project wizard has a dedicated PCB step (skip still allowed). Report load errors show the API detail instead of a generic fetch failure.
+
+- [New] Wizard step for `.kicad_pcb`. Upload later from Settings or Impedance.
+- [Improved] Report page retries briefly and links back to pipeline progress when `report.json` is missing.
+- [New] Drop the KiCad project folder (or a zip). Extra library junk is ignored; the board is picked up if present.
+
 ## 2.26.0 — 2026-09-11 — ImpedenceFinder Z0 on PCB nets
 
 A pipeline run with `.kicad_pcb` + stackup samples routed **signal** nets (power/ground skipped). Extra net names can be analyzed from the Impedance tab. Z0 is ImpedenceFinder net_walk/zsolver; no invented εr.

frontend/content/file-guide.md

@@ -1,9 +1,10 @@
 # File Upload Guide
 
-Pinscope needs two files from your EDA tool to review a design:
+Pinscope needs two files from your EDA tool to review a schematic, and an optional KiCad board for layout:
 
 - A **PADS-PCB ASCII netlist** or an **EDIF 2.0.0 netlist** — the circuit's connectivity. Pinscope accepts `.asc`, `.net`, `.NET`, `.txt` (PADS-PCB) and `.edn`, `.edif`, `.edf` (EDIF); the format is auto-detected from the file's first bytes.
 - A **Bill of Materials** (CSV or XLSX) — mapping each reference designator to a manufacturer part number.
+- Optional: a **KiCad PCB** (`.kicad_pcb`) — placement, keepout, pair length, and net Z0. Schematic review still runs without it.
 
 ## Example files
 
@@ -179,4 +180,8 @@ For both EasyEDA Standard and EasyEDA Pro.
 - **"No ground net found"** — your netlist has no net named `GND`, `VSS`, `AGND`, `DGND`, or similar. If you exported a sub-sheet, re-export the top sheet instead.
 - **Unresolved parts after the pipeline runs** — a BOM row has no MPN, or the MPN wasn't found on DigiKey. Add the MPN, or rely on Pinscope's value fallback (fills in from the `Value` / `Comment` column).
 
+## The KiCad PCB (optional)
+
+Drop the KiCad **project folder** (or a zip of it) on Schematic — Pinscope takes the sheets and the `.kicad_pcb` if it is there. You can also add the board later.
+
 Still stuck? [Contact us](/contact) with your netlist and BOM attached and we'll take a look.

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "frontend",
-  "version": "2.26.0",
+  "version": "2.26.1",
   "private": true,
   "scripts": {
     "sync-version": "node scripts/sync-version.mjs",

frontend/src/app/(app)/project/[id]/page.tsx

@@ -41,6 +41,7 @@ import {
 } from "lucide-react";
 import { useOptionalUser } from "@/hooks/use-optional-auth";
 import { ImpedancePanel } from "@/components/project/impedance-panel";
+import { PcbUploadButton } from "@/components/project/pcb-upload";
 
 export default function ProjectDetailPage({
   params,
@@ -190,6 +191,11 @@ export default function ProjectDetailPage({
           <h1 className="text-lg font-semibold">{project.name}</h1>
           <p className="text-sm text-muted-foreground">
             {new Date(project.created).toLocaleDateString()}
+            {project.hasPcb ? (
+              <span className="ml-2">· PCB uploaded</span>
+            ) : (
+              <span className="ml-2">· no PCB</span>
+            )}
             {typeof project.totalCostUsd === "number" && project.totalCostUsd > 0 && (
               <span className="ml-2 font-mono tabular-nums text-foreground">
                 ${project.totalCostUsd.toFixed(4)}
@@ -348,7 +354,11 @@ export default function ProjectDetailPage({
       )}
 
       {tab === "impedance" && (
-        <ImpedancePanel projectId={id} hasPcb={Boolean(project.hasPcb)} />
+        <ImpedancePanel
+          projectId={id}
+          hasPcb={Boolean(project.hasPcb)}
+          onPcbUploaded={reload}
+        />
       )}
 
       {tab === "logs" && (
@@ -357,6 +367,19 @@ export default function ProjectDetailPage({
 
       {tab === "settings" && (
         <div className="space-y-6">
+          <Card>
+            <CardHeader>
+              <CardTitle className="text-sm">KiCad PCB</CardTitle>
+            </CardHeader>
+            <CardContent className="space-y-2">
+              <p className="text-sm text-muted-foreground">
+                {project.hasPcb
+                  ? "A .kicad_pcb is on this project. Replace it here, then re-run the pipeline for layout and net Z0."
+                  : "No board yet. Schematic review does not need one. Layout checks and net Z0 do."}
+              </p>
+              <PcbUploadButton projectId={id} onUploaded={reload} />
+            </CardContent>
+          </Card>
           <CollaboratorsSection projectId={id} />
           <SkippedComponentsSection skipped={project.skippedComponents} />
           <ReportVersionSection pinscopeVersion={project.pinscopeVersion} />

frontend/src/app/(app)/project/[id]/progress/page.tsx

@@ -20,7 +20,7 @@ import {
 import { PipelineStepper } from "@/components/progress/pipeline-stepper";
 import { PausedRunBanner } from "@/components/billing/paused-run-banner";
 import { usePipelineProgress } from "@/hooks/use-pipeline-progress";
-import { cancelPipeline, fetchProject, resumePipeline, reprocessPipeline } from "@/lib/api";
+import { cancelPipeline, fetchProject, fetchReport, resumePipeline, reprocessPipeline } from "@/lib/api";
 import type { PauseCheckpoint } from "@/lib/types";
 import {
   AlertTriangle,
@@ -107,14 +107,24 @@ export default function ProgressPage({
     }
   };
 
-  // Auto-navigate to report when pipeline completes successfully
+  // Auto-navigate to report when pipeline completes and the file exists
   useEffect(() => {
-    if (done && !error && !cancelled && !projectPaused) {
-      const timer = setTimeout(() => {
-        router.push(`/project/${id}/report`);
-      }, 1500);
-      return () => clearTimeout(timer);
+    if (!done || error || cancelled || projectPaused) return;
+    let stopped = false;
+    (async () => {
+      for (let i = 0; i < 8; i++) {
+        try {
+          await fetchReport(id);
+          if (!stopped) router.push(`/project/${id}/report`);
+          return;
+        } catch {
+          await new Promise((r) => setTimeout(r, 500));
         }
+      }
+    })();
+    return () => {
+      stopped = true;
+    };
   }, [done, error, cancelled, projectPaused, id, router]);
 
   // Auto-navigate to dashboard when pipeline is cancelled

frontend/src/app/(app)/project/[id]/report/page.tsx

@@ -220,8 +220,18 @@ function ReportContent({ projectId }: { projectId: string }) {
 
   if (error || !report || !graph) {
     return (
-      <div className="p-6 max-w-5xl mx-auto w-full text-center py-12 text-sm text-muted-foreground">
+      <div className="p-6 max-w-5xl mx-auto w-full text-center py-12 space-y-3">
+        <p className="text-sm text-muted-foreground">
           {error ?? "Report not found."}
+        </p>
+        <p className="text-sm">
+          <a
+            href={`/project/${projectId}/progress`}
+            className="text-blue-600 dark:text-blue-500 hover:underline"
+          >
+            Open pipeline progress
+          </a>
+        </p>
       </div>
     );
   }

frontend/src/components/dashboard/create-project-dialog.tsx

@@ -352,6 +352,7 @@ function summarizeLcscModel(model: Record<string, unknown>): string {
 
 type WizardStep =
   | "details"
+  | "pcb"
   | "columns"
   | "subdesigns"
   | "lcsc-passives"
@@ -361,6 +362,7 @@ type WizardStep =
 
 const ALL_STEPS: { key: WizardStep; label: string }[] = [
   { key: "details", label: "Project Details" },
+  { key: "pcb", label: "Board (optional)" },
   { key: "columns", label: "BOM Columns" },
   { key: "subdesigns", label: "Sub-designs" },
   { key: "lcsc-passives", label: "Resolving Passive Specs" },
@@ -374,6 +376,45 @@ const ALL_STEPS: { key: WizardStep; label: string }[] = [
 const NULL_SUBDESIGN_KEY = "";
 const _subKey = (id: string | null): string => id ?? NULL_SUBDESIGN_KEY;
 
+const _NET_EXT = new Set([
+  ".kicad_sch",
+  ".kicad_net",
+  ".kicad_pro",
+  ".asc",
+  ".net",
+  ".edn",
+  ".edif",
+  ".edf",
+  ".xml",
+  ".zip",
+]);
+
+function _fileExt(name: string): string {
+  const i = name.lastIndexOf(".");
+  return i >= 0 ? name.slice(i).toLowerCase() : "";
+}
+
+function splitProjectFiles(incoming: File[]): {
+  netlist: File[];
+  pcb: File[];
+  bom: File[];
+} {
+  const netlist: File[] = [];
+  const pcb: File[] = [];
+  const bom: File[] = [];
+  for (const f of incoming) {
+    const rel = (
+      (f as File & { webkitRelativePath?: string }).webkitRelativePath || f.name
+    ).toLowerCase();
+    if (rel.includes("-backups/") || rel.includes(".pretty/")) continue;
+    const ext = _fileExt(f.name);
+    if (ext === ".kicad_pcb") pcb.push(f);
+    else if (ext === ".csv" || ext === ".xlsx") bom.push(f);
+    else if (_NET_EXT.has(ext)) netlist.push(f);
+  }
+  return { netlist, pcb, bom };
+}
+
 // Concurrency cap for the per-row LCSC passive resolve. Backend charges one
 // credit-billing API call per request; small batch keeps latency reasonable
 // without overloading the resolve endpoint.
@@ -533,7 +574,7 @@ export function CreateProjectDialog({
   // Rerun mode: operate on an existing project rather than creating new.
   const [existingProjectId, setExistingProjectId] = useState<string | null>(null);
   const [initialBomFile, setInitialBomFile] = useState<File | null>(null);
-  const [initialNetlistFile, setInitialNetlistFile] = useState<File | null>(null);
+  const [initialNetlistFiles, setInitialNetlistFiles] = useState<File[]>([]);
   const [existingDatasheetStems, setExistingDatasheetStems] = useState<Set<string>>(
     new Set(),
   );
@@ -548,8 +589,12 @@ export function CreateProjectDialog({
   // Step 1
   const [name, setName] = useState("");
   const [bomFile, setBomFile] = useState<File | null>(null);
-  const [netlistFile, setNetlistFile] = useState<File | null>(null);
+  const [netlistFiles, setNetlistFiles] = useState<File[]>([]);
+  const netlistFile = netlistFiles[0] ?? null;
   const [pcbFile, setPcbFile] = useState<File | null>(null);
+  const skipPcbStep =
+    Boolean(pcbFile) ||
+    netlistFiles.some((f) => f.name.toLowerCase().endsWith(".zip"));
   const [netlistNetCount, setNetlistNetCount] = useState<number | null>(null);
   const [netlistError, setNetlistError] = useState<string | null>(null);
 
@@ -840,6 +885,7 @@ export function CreateProjectDialog({
       // lcsc-passives drains to zero before the auto-advance effect
       // moves us off the step on the next tick).
       if (s.key === step) return true;
+      if (s.key === "pcb") return !skipPcbStep;
       if (s.key === "subdesigns") return hasSubdesignChoice;
       if (s.key === "lcsc-passives") return hasLcscPassives;
       if (s.key === "datasheets") return hasIcs;
@@ -847,14 +893,15 @@ export function CreateProjectDialog({
       if (s.key === "passives") return hasPassives;
       return true;
     });
-  }, [step, hasSubdesignChoice, hasLcscPassives, hasIcs, hasSimple, hasPassives]);
+  }, [step, skipPcbStep, hasSubdesignChoice, hasLcscPassives, hasIcs, hasSimple, hasPassives]);
 
   const stepIndex = activeSteps.findIndex((s) => s.key === step);
 
   // ---- Handlers ----
 
   const handleBomChange = useCallback((files: File[]) => {
-    const file = files[0] || null;
+    const file =
+      files.find((f) => /\.(csv|xlsx)$/i.test(f.name)) || files[0] || null;
     setBomFile(file);
     if (!file) {
       setCsvData(null);
@@ -880,9 +927,13 @@ export function CreateProjectDialog({
     }
   }, []);
 
-  const handleNetlistChange = useCallback((files: File[]) => {
+  const handleNetlistChange = useCallback((incoming: File[]) => {
+    const { netlist, pcb, bom } = splitProjectFiles(incoming);
+    if (pcb[0]) setPcbFile(pcb[0]);
+    if (bom[0]) handleBomChange([bom[0]]);
+    const files = netlist;
     const file = files[0] || null;
-    setNetlistFile(file);
+    setNetlistFiles(files);
     setNetlistNetCount(null);
     setNetlistError(null);
     // Invalidate any cached netlist preview, since it was relative to the
@@ -895,6 +946,11 @@ export function CreateProjectDialog({
     setNetlistUploadedEarly(false);
     setNetlistIsEdif(false);
     if (!file) return;
+    const lower = file.name.toLowerCase();
+    if (lower.endsWith(".zip") || files.length > 1) {
+      setNetlistPreview([]);
+      return;
+    }
     file.text().then((text) => {
       // EDIF: skip browser-side preview — the net-count badge will populate
       // after the server upload parses the file.
@@ -920,14 +976,15 @@ export function CreateProjectDialog({
         );
       }
     });
-  }, []);
+  }, [handleBomChange]);
 
   const resetAndClose = useCallback(() => {
     setOpen(false);
     setStep("details");
     setName("");
     setBomFile(null);
-    setNetlistFile(null);
+    setNetlistFiles([]);
+    setPcbFile(null);
     setNetlistNetCount(null);
     setNetlistError(null);
     setCsvData(null);
@@ -954,7 +1011,7 @@ export function CreateProjectDialog({
     setError(null);
     setExistingProjectId(null);
     setInitialBomFile(null);
-    setInitialNetlistFile(null);
+    setInitialNetlistFiles([]);
     setExistingDatasheetStems(new Set());
     setPrefillLoading(false);
     setPrefillError(null);
@@ -1049,8 +1106,8 @@ export function CreateProjectDialog({
         if (netlist) {
           const netlistText = await netlist.text();
           if (cancelled) return;
-          setNetlistFile(netlist);
-          setInitialNetlistFile(netlist);
+          setNetlistFiles([netlist]);
+          setInitialNetlistFiles([netlist]);
           if (isEdifNetlist(netlistText)) {
             setNetlistIsEdif(true);
             // EDIF: PADS-shape browser preview doesn't apply.
@@ -1135,7 +1192,7 @@ export function CreateProjectDialog({
         if (netlist) {
           const netlistText = await netlist.text();
           if (cancelled) return;
-          setNetlistFile(netlist);
+          setNetlistFiles([netlist]);
           if (isEdifNetlist(netlistText)) {
             setNetlistIsEdif(true);
             setNetlistNetCount(null);
@@ -1488,7 +1545,7 @@ export function CreateProjectDialog({
       setBomUploadedEarly(true);
       setInitialBomFile(bomFile);
       // Treat the netlist as fresh so it still uploads in handleCreate.
-      setInitialNetlistFile(null);
+      setInitialNetlistFiles([]);
       const map = uploadRes.lcsc_to_mpn ?? {};
       if (Object.keys(map).length > 0) setLcscToMpn(map);
       if (fullProj.lcscPayloads && Object.keys(fullProj.lcscPayloads).length > 0) {
@@ -1547,13 +1604,13 @@ export function CreateProjectDialog({
         createdProjectIdHere = proj.id;
         setExistingProjectId(proj.id);
       }
-      const result = await uploadNetlist(projectId, netlistFile);
+      const result = await uploadNetlist(projectId, netlistFiles);
       setEdifSubDesigns(result.sub_designs);
       if (result.designator_pins.length > 0) {
         setNetlistPreview(result.designator_pins);
       }
       setNetlistUploadedEarly(true);
-      setInitialNetlistFile(netlistFile);
+      setInitialNetlistFiles(netlistFiles);
       return { ok: true, subDesigns: result.sub_designs };
     } catch (e) {
       // Only delete the project if we created it just now — leave LCSC's
@@ -1573,7 +1630,7 @@ export function CreateProjectDialog({
     } finally {
       setEarlyUploading(false);
     }
-  }, [netlistFile, existingProjectId, name]);
+  }, [netlistFile, netlistFiles, existingProjectId, name]);
 
   // ---- LCSC per-row passive resolve ----
   //
@@ -1689,6 +1746,7 @@ export function CreateProjectDialog({
 
   const canAdvance = (): boolean => {
     if (step === "details") return !!(name.trim() && bomFile && netlistFile && !netlistError);
+    if (step === "pcb") return true;
     if (step === "columns") return !!(refCol && mpnCol);
     if (step === "subdesigns")
       return !!(selectedSubdesignIds && selectedSubdesignIds.size > 0);
@@ -1729,6 +1787,9 @@ export function CreateProjectDialog({
         const res = await runEarlyNetlistUpload();
         if (!res.ok) return;
       }
+      setStep(skipPcbStep ? "columns" : "pcb");
+    }
+    else if (step === "pcb") {
       setStep("columns");
     }
     else if (step === "columns") {
@@ -1806,7 +1867,8 @@ export function CreateProjectDialog({
 
   const goBack = () => {
     setError(null);
-    if (step === "columns") setStep("details");
+    if (step === "pcb") setStep("details");
+    else if (step === "columns") setStep(skipPcbStep ? "details" : "pcb");
     else if (step === "subdesigns") setStep("columns");
     else if (step === "lcsc-passives") {
       if (hasSubdesignChoice) setStep("subdesigns");
@@ -1877,9 +1939,9 @@ export function CreateProjectDialog({
           );
         }
 
-        if (!projectAlreadyExists || netlistFile !== initialNetlistFile) {
+        if (!projectAlreadyExists || netlistFiles !== initialNetlistFiles) {
           setProgress("Uploading netlist...");
-          await uploadNetlist(project.id, netlistFile!);
+          await uploadNetlist(project.id, netlistFiles);
         }
         if (pcbFile) {
           setProgress("Uploading PCB...");
@@ -2065,14 +2127,13 @@ export function CreateProjectDialog({
               <div className="grid grid-cols-2 gap-3">
                 <div className="space-y-1.5">
                   <FileUploadZone
-                    label="BOM (.csv, .xlsx)"
+                    label="BOM"
                     accept=".csv,.xlsx"
                     files={bomFile ? [bomFile] : []}
                     onFilesChange={handleBomChange}
                   />
                   <p className="text-[11px] text-muted-foreground leading-tight px-1">
-                    Requires columns: Designator, Manufacturer Part Number, and
-                    Comment (for passive values / mismatch detection).{" "}
+                    CSV or Excel.{" "}
                     <a
                       href="/file-guide#the-bom"
                       target="_blank"
@@ -2085,9 +2146,10 @@ export function CreateProjectDialog({
                 </div>
                 <div className="space-y-1.5">
                   <FileUploadZone
-                    label="Netlist (.asc / .net / .edn / .kicad_sch)"
-                    accept=".asc,.net,.NET,.txt,.edn,.edif,.edf,.xml,.kicad_sch,.kicad_net"
-                    files={netlistFile ? [netlistFile] : []}
+                    label="Schematic"
+                    accept=".asc,.net,.NET,.txt,.edn,.edif,.edf,.xml,.kicad_sch,.kicad_net,.zip"
+                    multiple
+                    files={netlistFiles}
                     onFilesChange={handleNetlistChange}
                   />
                   {netlistError ? (
@@ -2099,13 +2161,17 @@ export function CreateProjectDialog({
                     <p className="text-[11px] text-muted-foreground leading-tight px-1">
                       {netlistNetCount} nets detected
                     </p>
-                  ) : netlistFile ? (
+                  ) : netlistFiles.length > 0 ? (
                     <p className="text-[11px] text-muted-foreground leading-tight px-1">
-                      Net count will appear after upload.
+                      {pcbFile
+                        ? "Board included."
+                        : netlistFiles.length > 1
+                          ? `${netlistFiles.length} schematic files.`
+                          : "Ready."}
                     </p>
                   ) : (
                     <p className="text-[11px] text-muted-foreground leading-tight px-1">
-                      PADS-PCB, EDIF, or KiCad netlist / .kicad_sch.{" "}
+                      Drop the KiCad folder, or one netlist.{" "}
                       <a
                         href="/file-guide#the-netlist"
                         target="_blank"
@@ -2118,19 +2184,20 @@ export function CreateProjectDialog({
                   )}
                 </div>
               </div>
-              <div className="space-y-1.5">
+            </div>
+          )}
+
+          {step === "pcb" && (
+            <div className="space-y-4">
+              <p className="text-sm text-muted-foreground">
+                Optional. Skip if you only want schematic review.
+              </p>
               <FileUploadZone
-                  label="PCB (.kicad_pcb, optional)"
+                label="KiCad board (.kicad_pcb)"
                 accept=".kicad_pcb"
                 files={pcbFile ? [pcbFile] : []}
                 onFilesChange={(files) => setPcbFile(files[0] ?? null)}
               />
-                <p className="text-[11px] text-muted-foreground leading-tight px-1">
-                  Optional. Layout checks (trace width, 3W, placement mm) stay
-                  off until a board is present. Schema review still runs
-                  without it.
-                </p>
-              </div>
             </div>
           )}
 

frontend/src/components/project/impedance-panel.tsx

@@ -10,6 +10,7 @@ import {
   computeImpedance,
   fetchImpedanceNets,
 } from "@/lib/api";
+import { PcbUploadButton } from "@/components/project/pcb-upload";
 import type {
   ImpedanceKind,
   ImpedanceNetsReport,
@@ -29,9 +30,11 @@ function fmt(n: number | null | undefined, digits = 2): string {
 export function ImpedancePanel({
   projectId,
   hasPcb,
+  onPcbUploaded,
 }: {
   projectId: string;
   hasPcb: boolean;
+  onPcbUploaded?: () => void;
 }) {
   const [kind, setKind] = useState<ImpedanceKind>("microstrip");
   const [h, setH] = useState("0.20");
@@ -225,10 +228,13 @@ export function ImpedancePanel({
         </CardHeader>
         <CardContent className="space-y-3">
           {!hasPcb && (
+            <div className="space-y-2">
               <p className="text-sm text-muted-foreground">
-              Upload a `.kicad_pcb` and run analysis. Power/ground nets are
-              skipped; signal traces with stackup εr/h are sampled.
+                Upload a `.kicad_pcb`, then re-run the pipeline. Power/ground
+                nets are skipped; signal traces with stackup εr/h are sampled.
               </p>
+              <PcbUploadButton projectId={projectId} onUploaded={onPcbUploaded} />
+            </div>
           )}
           {hasPcb && boardNets?.skipped && (
             <p className="text-sm text-muted-foreground">{boardNets.skipped}</p>

frontend/src/components/project/pcb-upload.tsx

@@ -0,0 +1,60 @@
+"use client";
+
+import { useState } from "react";
+import { Upload, Loader2 } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { uploadPcb } from "@/lib/api";
+
+export function PcbUploadButton({
+  projectId,
+  onUploaded,
+}: {
+  projectId: string;
+  onUploaded?: () => void;
+}) {
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  return (
+    <div className="space-y-1">
+      <label className="inline-flex">
+        <Button
+          size="sm"
+          variant="outline"
+          disabled={busy}
+          nativeButton={false}
+          render={<span />}
+        >
+          {busy ? (
+            <Loader2 className="h-4 w-4 mr-1 animate-spin" />
+          ) : (
+            <Upload className="h-4 w-4 mr-1" />
+          )}
+          {busy ? "Uploading…" : "Upload .kicad_pcb"}
+        </Button>
+        <input
+          type="file"
+          accept=".kicad_pcb"
+          className="hidden"
+          disabled={busy}
+          onChange={async (e) => {
+            const file = e.target.files?.[0];
+            e.target.value = "";
+            if (!file) return;
+            setBusy(true);
+            setError(null);
+            try {
+              await uploadPcb(projectId, file);
+              onUploaded?.();
+            } catch (err) {
+              setError(err instanceof Error ? err.message : "Upload failed");
+            } finally {
+              setBusy(false);
+            }
+          }}
+        />
+      </label>
+      {error && <p className="text-xs text-destructive">{error}</p>}
+    </div>
+  );
+}

frontend/src/components/upload/file-upload-zone.tsx

@@ -13,6 +13,80 @@ interface FileUploadZoneProps {
   preloaded?: string[];
 }
 
+function withRelativePath(file: File, rel: string): File {
+  if ((file as File & { webkitRelativePath?: string }).webkitRelativePath === rel) {
+    return file;
+  }
+  try {
+    Object.defineProperty(file, "webkitRelativePath", {
+      value: rel,
+      configurable: true,
+    });
+  } catch {
+    /* ignore — some File objects are sealed */
+  }
+  return file;
+}
+
+function readDirEntries(
+  reader: FileSystemDirectoryReader,
+): Promise<FileSystemEntry[]> {
+  return new Promise((resolve, reject) => {
+    const acc: FileSystemEntry[] = [];
+    const pump = () => {
+      reader.readEntries((chunk) => {
+        if (chunk.length === 0) resolve(acc);
+        else {
+          acc.push(...chunk);
+          pump();
+        }
+      }, reject);
+    };
+    pump();
+  });
+}
+
+async function filesFromEntry(
+  entry: FileSystemEntry,
+  prefix: string,
+): Promise<File[]> {
+  if (entry.isFile) {
+    const file = await new Promise<File>((resolve, reject) => {
+      (entry as FileSystemFileEntry).file(resolve, reject);
+    });
+    return [withRelativePath(file, prefix + file.name)];
+  }
+  if (entry.isDirectory) {
+    const skip = /(-backups|\.pretty|3dmodels|__macosx)$/i.test(entry.name);
+    if (skip) return [];
+    const reader = (entry as FileSystemDirectoryEntry).createReader();
+    const children = await readDirEntries(reader);
+    const nested: File[] = [];
+    for (const child of children) {
+      nested.push(...(await filesFromEntry(child, prefix + entry.name + "/")));
+    }
+    return nested;
+  }
+  return [];
+}
+
+async function filesFromDrop(e: React.DragEvent): Promise<File[]> {
+  const items = e.dataTransfer?.items;
+  if (items && items.length > 0) {
+    const out: File[] = [];
+    for (const item of Array.from(items)) {
+      const entry = item.webkitGetAsEntry?.();
+      if (entry) out.push(...(await filesFromEntry(entry, "")));
+      else {
+        const f = item.getAsFile();
+        if (f) out.push(f);
+      }
+    }
+    if (out.length > 0) return out;
+  }
+  return Array.from(e.dataTransfer?.files ?? []);
+}
+
 export function FileUploadZone({
   label,
   accept,
@@ -27,10 +101,11 @@ export function FileUploadZone({
     (e: React.DragEvent) => {
       e.preventDefault();
       setDragOver(false);
-      const dropped = Array.from(e.dataTransfer.files);
+      void filesFromDrop(e).then((dropped) => {
         onFilesChange(multiple ? [...files, ...dropped] : dropped.slice(0, 1));
+      });
     },
-    [files, multiple, onFilesChange]
+    [files, multiple, onFilesChange],
   );
 
   const handleChange = useCallback(
@@ -38,7 +113,7 @@ export function FileUploadZone({
       const selected = Array.from(e.target.files ?? []);
       onFilesChange(multiple ? [...files, ...selected] : selected.slice(0, 1));
     },
-    [files, multiple, onFilesChange]
+    [files, multiple, onFilesChange],
   );
 
   const hasFiles = files.length > 0 || (preloaded && preloaded.length > 0);
@@ -48,9 +123,12 @@ export function FileUploadZone({
       className={cn(
         "flex flex-col items-center justify-center gap-2 rounded-lg border-2 border-dashed p-6 cursor-pointer transition-colors",
         dragOver ? "border-blue-500 bg-blue-500/5" : "border-border hover:border-foreground/20",
-        hasFiles && "border-emerald-500/40 bg-emerald-500/5"
+        hasFiles && "border-emerald-500/40 bg-emerald-500/5",
       )}
-      onDragOver={(e) => { e.preventDefault(); setDragOver(true); }}
+      onDragOver={(e) => {
+        e.preventDefault();
+        setDragOver(true);
+      }}
       onDragLeave={() => setDragOver(false)}
       onDrop={handleDrop}
     >
@@ -69,12 +147,27 @@ export function FileUploadZone({
       )}
       {files.length > 0 && (
         <div className="text-xs text-muted-foreground">
-          {files.map((f) => (
-            <span key={f.name} className="font-mono block">{f.name}</span>
-          ))}
+          {files.length <= 2 ? (
+            files.map((f) => {
+              const rel =
+                (f as File & { webkitRelativePath?: string }).webkitRelativePath ||
+                f.name;
+              return (
+                <span key={rel} className="font-mono block">{rel.split("/").pop()}</span>
+              );
+            })
+          ) : (
+            <span>{files.length} files</span>
+          )}
         </div>
       )}
-      <input type="file" accept={accept} multiple={multiple} className="hidden" onChange={handleChange} />
+      <input
+        type="file"
+        accept={accept}
+        multiple={multiple}
+        className="hidden"
+        onChange={handleChange}
+      />
     </label>
   );
 }

frontend/src/hooks/use-report.ts

@@ -4,6 +4,13 @@ import { useState, useEffect } from "react";
 import type { ValidationReport, DesignGraph } from "@/lib/types";
 import { fetchReport, fetchGraph } from "@/lib/api";
 
+function describeLoadError(e: unknown): string {
+  if (e instanceof TypeError) {
+    return "Could not reach the Pinscope API. Check that the backend is running and that /api is proxied to it.";
+  }
+  return e instanceof Error ? e.message : "Failed to load report";
+}
+
 export function useReport(projectId: string) {
   const [report, setReport] = useState<ValidationReport | null>(null);
   const [graph, setGraph] = useState<DesignGraph | null>(null);
@@ -11,14 +18,39 @@ export function useReport(projectId: string) {
   const [error, setError] = useState<string | null>(null);
 
   useEffect(() => {
+    let cancelled = false;
     setLoading(true);
-    Promise.all([fetchReport(projectId), fetchGraph(projectId)])
-      .then(([r, g]) => {
+    setError(null);
+
+    (async () => {
+      let lastErr: unknown;
+      for (let attempt = 0; attempt < 4; attempt++) {
+        try {
+          const [r, g] = await Promise.all([
+            fetchReport(projectId),
+            fetchGraph(projectId),
+          ]);
+          if (!cancelled) {
             setReport(r);
             setGraph(g);
-      })
-      .catch((e) => setError(e.message))
-      .finally(() => setLoading(false));
+          }
+          return;
+        } catch (e) {
+          lastErr = e;
+          const msg = e instanceof Error ? e.message : "";
+          const retryable = msg.includes("not found") || e instanceof TypeError;
+          if (!retryable || attempt === 3) break;
+          await new Promise((r) => setTimeout(r, 400 * (attempt + 1)));
+        }
+      }
+      if (!cancelled) setError(describeLoadError(lastErr));
+    })().finally(() => {
+      if (!cancelled) setLoading(false);
+    });
+
+    return () => {
+      cancelled = true;
+    };
   }, [projectId]);
 
   return { report, graph, loading, error };

frontend/src/lib/api.ts

@@ -56,6 +56,19 @@ async function authFetch(url: string, init?: RequestInit): Promise<Response> {
   return fetch(url, { ...init, headers });
 }
 
+async function throwHttpError(res: Response, fallback: string): Promise<never> {
+  let detail: unknown;
+  try {
+    const body = await res.json();
+    detail = (body as { detail?: unknown; error?: unknown }).detail
+      ?? (body as { error?: unknown }).error;
+  } catch {
+    detail = undefined;
+  }
+  const msg = typeof detail === "string" && detail.trim() ? detail : fallback;
+  throw new Error(msg);
+}
+
 // --- Projects ---
 
 function mapProject(p: Record<string, unknown>): Project {
@@ -301,10 +314,19 @@ export async function uploadPcb(
 }
 
 export async function uploadNetlist(
-  projectId: string, file: File,
+  projectId: string, files: File | File[],
 ): Promise<UploadNetlistResult> {
+  const list = Array.isArray(files) ? files : [files];
   const form = new FormData();
-  form.append("file", file);
+  const rels = list.map((f) => {
+    const rel = (f as File & { webkitRelativePath?: string }).webkitRelativePath;
+    return rel && rel.length > 0 ? rel : f.name;
+  });
+  if (list[0]) form.append("file", list[0], list[0].name);
+  if (list.length > 1) {
+    for (const f of list) form.append("files", f, f.name);
+    form.append("paths", JSON.stringify(rels));
+  }
   const res = await authFetch(
     `${BASE}/api/projects/${projectId}/upload/netlist`,
     { method: "POST", body: form },
@@ -651,7 +673,14 @@ export async function fetchReport(
   projectId: string,
 ): Promise<ValidationReport> {
   const res = await authFetch(`${BASE}/api/report/${projectId}`);
-  if (!res.ok) throw new Error("Failed to fetch report");
+  if (!res.ok) {
+    await throwHttpError(
+      res,
+      res.status === 404
+        ? "Report not found — the pipeline has not finished, or it failed before writing a report."
+        : "Failed to fetch report",
+    );
+  }
   return res.json();
 }
 
@@ -723,7 +752,14 @@ export async function deleteComment(
 
 export async function fetchGraph(projectId: string): Promise<DesignGraph> {
   const res = await authFetch(`${BASE}/api/graph/${projectId}`);
-  if (!res.ok) throw new Error("Failed to fetch graph");
+  if (!res.ok) {
+    await throwHttpError(
+      res,
+      res.status === 404
+        ? "Design graph not found — the pipeline has not finished, or it failed during graph build."
+        : "Failed to fetch graph",
+    );
+  }
   return res.json();
 }
 

frontend/src/lib/version.ts

@@ -1,4 +1,4 @@
 // AUTO-GENERATED by scripts/sync-version.mjs from content/changelog.md.
 // Do not edit by hand — change the top "## X.Y.Z" heading in the changelog.
-export const APP_VERSION = "2.26.0";
+export const APP_VERSION = "2.26.1";
 export const APP_VERSION_DATE = "2026-09-11";

tests/test_netlist_bundle.py

@@ -0,0 +1,202 @@
+"""Multi-file / zip KiCad schematic ingest."""
+
+from __future__ import annotations
+
+import io
+import zipfile
+from pathlib import Path
+
+import pytest
+
+from backend.pinscopex.netlist_bundle import (
+    find_kicad_pcb,
+    materialize_netlist_upload,
+    sniff_netlist_kind,
+)
+from backend.pinscopex.parsers import parse_netlist_any, validate_netlist
+
+_LIB_R = """
+  (lib_symbols
+    (symbol "Device:R"
+      (pin passive (at 0 3.81 90) (length 2.54)
+        (name "~" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin passive (at 0 -3.81 90) (length 2.54)
+        (name "~" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
+"""
+
+
+def _resistor(ref: str, value: str) -> str:
+    uid = "aaaaaaaa-aaaa-aaaa-aaaa-" + ref.encode().hex()[:12].ljust(12, "0")
+    return f"""
+  (symbol
+    (lib_id "Device:R")
+    (at 0 0 0)
+    (unit 1)
+    (uuid "{uid}")
+    (property "Reference" "{ref}" (at 0 0 0) (effects (font (size 1.27 1.27))))
+    (property "Value" "{value}" (at 0 0 0) (effects (font (size 1.27 1.27))))
+    (pin "1" (uuid "p1"))
+    (pin "2" (uuid "p2"))
+  )
+"""
+
+
+def _sch(*body: str) -> str:
+    return (
+        "(kicad_sch (version 20250114) (uuid \"11111111-1111-1111-1111-111111111111\")"
+        + _LIB_R
+        + "".join(body)
+        + "\n)\n"
+    )
+
+
+def _root_with_child() -> tuple[str, str]:
+    child = _sch(
+        _resistor("C1", "100n"),
+        """
+  (global_label "GND" (at 0 3.81 0) (uuid "cccccccccccccccccccccccccccccccccccc"))
+""",
+    )
+    root = _sch(
+        _resistor("R1", "10k"),
+        """
+  (global_label "GND" (at 0 3.81 0) (uuid "bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb"))
+  (sheet
+    (at 50 0)
+    (size 20 20)
+    (property "Sheetname" "Child" (at 50 0 0) (effects (font (size 1.27 1.27))))
+    (property "Sheetfile" "child.kicad_sch" (at 50 0 0) (effects (font (size 1.27 1.27))))
+  )
+""",
+    )
+    return root, child
+
+
+def test_sniff_rejects_pcb_as_netlist():
+    assert sniff_netlist_kind(b"(kicad_pcb (version 1)\n") == "kicad_pcb"
+    assert sniff_netlist_kind(b"PK\x03\x04rest") == "zip"
+    assert sniff_netlist_kind(b"(kicad_sch (version 1)") == "kicad_sch"
+    assert sniff_netlist_kind(b"*PADS-PCB*\n*PART*\n") == "pads"
+
+
+def test_root_alone_missing_child_explains_multi_file(tmp_path: Path):
+    from backend.pinscopex.parsers_kicad import parse_kicad
+
+    root, _child = _root_with_child()
+    parsed = materialize_netlist_upload(
+        [("root.kicad_sch", root.encode())],
+        tmp_path / "work",
+    )
+    with pytest.raises(ValueError, match="child.kicad_sch"):
+        parse_kicad(parsed.root)
+
+
+def test_multiple_sch_files_parse(tmp_path: Path):
+    root, child = _root_with_child()
+    parsed = materialize_netlist_upload(
+        [
+            ("root.kicad_sch", root.encode()),
+            ("child.kicad_sch", child.encode()),
+        ],
+        tmp_path / "work",
+    )
+    parts, nets, fmt = parse_netlist_any(parsed.root)
+    assert fmt == "kicad_sch"
+    assert "R1" in parts and "C1" in parts
+    assert ("R1", "1") in nets["GND"] and ("C1", "1") in nets["GND"]
+    assert validate_netlist(parts, nets) == []
+    assert parsed.pcb is None
+
+
+def test_zip_with_nested_folder_and_pcb(tmp_path: Path):
+    root, child = _root_with_child()
+    pcb = b'(kicad_pcb (version 20240108) (generator pcbnew)\n  (net 0 "")\n)\n'
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w") as zf:
+        zf.writestr("board/root.kicad_sch", root)
+        zf.writestr("board/child.kicad_sch", child)
+        zf.writestr("board/board.kicad_pcb", pcb)
+    parsed = materialize_netlist_upload(
+        [("board.zip", buf.getvalue())],
+        tmp_path / "work",
+    )
+    parts, nets, _fmt = parse_netlist_any(parsed.root)
+    assert "R1" in parts and "C1" in parts
+    assert parsed.pcb is not None
+    assert find_kicad_pcb(parsed.work_dir) is not None
+
+
+def test_zip_slip_is_rejected(tmp_path: Path):
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w") as zf:
+        zf.writestr("../escape.kicad_sch", _sch(_resistor("R1", "1k")))
+    with pytest.raises(ValueError, match="Rejected"):
+        materialize_netlist_upload(
+            [("bad.zip", buf.getvalue())],
+            tmp_path / "work",
+        )
+
+
+def test_api_accepts_zip_and_companion_sheets(tmp_path: Path):
+    from fastapi.testclient import TestClient
+
+    from backend.main import app
+    from backend.services.storage import LocalStorageBackend
+
+    app.state.storage = LocalStorageBackend(tmp_path)
+    client = TestClient(app)
+    pid = client.post("/api/projects", json={"name": "kicad"}).json()["id"]
+    root, child = _root_with_child()
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w") as zf:
+        zf.writestr("root.kicad_sch", root)
+        zf.writestr("child.kicad_sch", child)
+    resp = client.post(
+        f"/api/projects/{pid}/upload/netlist",
+        files={"file": ("board.zip", buf.getvalue(), "application/zip")},
+    )
+    assert resp.status_code == 200, resp.text
+    body = resp.json()
+    assert body["parts"] == 2
+    assert body["format"] == "kicad_sch"
+    storage = client.app.state.storage
+    prefix = f"users/local/projects/{pid}/uploads/"
+    assert storage.exists(prefix + "netlist.kicad_sch")
+    assert storage.exists(prefix + "child.kicad_sch")
+
+
+def test_api_accepts_multiple_sch_files(tmp_path: Path):
+    from fastapi.testclient import TestClient
+
+    from backend.main import app
+    from backend.services.storage import LocalStorageBackend
+
+    app.state.storage = LocalStorageBackend(tmp_path)
+    client = TestClient(app)
+    pid = client.post("/api/projects", json={"name": "multi"}).json()["id"]
+    root, child = _root_with_child()
+    resp = client.post(
+        f"/api/projects/{pid}/upload/netlist",
+        files=[
+            ("files", ("root.kicad_sch", root.encode(), "text/plain")),
+            ("files", ("child.kicad_sch", child.encode(), "text/plain")),
+        ],
+        data={"paths": '["root.kicad_sch", "child.kicad_sch"]'},
+    )
+    assert resp.status_code == 200, resp.text
+    assert resp.json()["parts"] == 2
+
+
+
+def test_kicad_pcb_bytes_are_not_parsed_as_pads(tmp_path: Path):
+    with pytest.raises(ValueError, match="board"):
+        materialize_netlist_upload(
+            [("board.kicad_pcb", b"(kicad_pcb (version 1)\n")],
+            tmp_path / "work",
+        )