diff --git a/src/main/database/documents-work-products.ts b/src/main/database/documents-work-products.ts
index 92ec4884..67615b11 100644
--- a/src/main/database/documents-work-products.ts
+++ b/src/main/database/documents-work-products.ts
@@ -33,6 +33,38 @@ function resolveWorkspaceRoot(
   return null;
 }
 
+function listCompanyWorkspaceRoots(
+  getDb: () => DatabaseSync,
+  companyId: string,
+): string[] {
+  return (getDb()
+    .prepare(
+      "SELECT local_path AS localPath FROM workspaces WHERE company_id = ? AND local_path IS NOT NULL ORDER BY is_primary DESC, created_at ASC",
+    )
+    .all(companyId) as Array<{ localPath: string }>)
+    .map((row) => row.localPath)
+    .filter((localPath) => localPath.length > 0);
+}
+
+function orderedUnique(values: Array<string | null>): string[] {
+  const seen = new Set<string>();
+  const unique: string[] = [];
+  for (const value of values) {
+    if (!value || seen.has(value)) continue;
+    seen.add(value);
+    unique.push(value);
+  }
+  return unique;
+}
+
+function fileExists(targetPath: string): boolean {
+  try {
+    return statSync(targetPath).isFile();
+  } catch {
+    return false;
+  }
+}
+
 function joinWorkspaceRelative(root: string, rel: string): string | null {
   if (isAbsolute(rel)) return null;
   const joined = resolvePath(root, rel);
@@ -155,7 +187,7 @@ export function buildWorkProductMethods(
       companyId: string,
     ):
       | { kind: "url" | "path"; value: string }
-      | { kind: "error"; reason: "not_found" | "archived" | "no_target" | "workspace_unresolved" | "path_escape"; detail: string } {
+      | { kind: "error"; reason: "not_found" | "archived" | "no_target" | "workspace_unresolved" | "path_escape" | "path_missing"; detail: string } {
       const row = getDb().prepare(
         "SELECT provider, external_id, url, status, task_id, created_by_run_id, last_touched_by_run_id, workspace_id FROM work_products WHERE id = ? AND company_id = ?",
       ).get(workProductId, companyId) as
@@ -169,42 +201,40 @@ export function buildWorkProductMethods(
         return { kind: "error", reason: "no_target", detail: `provider=${row.provider} external_id=${row.external_id ?? "null"} url=null` };
       }
 
-      const workspaceRoot = resolveWorkspaceRoot(
-        getDb,
-        companyId,
-        row.workspace_id,
-        row.task_id,
-        row.last_touched_by_run_id ?? row.created_by_run_id,
-      );
-      if (workspaceRoot) {
+      const workspaceRoots = orderedUnique([
+        resolveWorkspaceRoot(
+          getDb,
+          companyId,
+          row.workspace_id,
+          row.task_id,
+          row.last_touched_by_run_id ?? row.created_by_run_id,
+        ),
+        ...listCompanyWorkspaceRoots(getDb, companyId),
+      ]);
+      let firstCandidate: string | null = null;
+      for (const workspaceRoot of workspaceRoots) {
         const absolute = joinWorkspaceRelative(workspaceRoot, row.external_id);
         if (!absolute) {
           return { kind: "error", reason: "path_escape", detail: `external_id=${row.external_id} escapes workspace root ${workspaceRoot}` };
         }
-        return { kind: "path", value: absolute };
-      }
-
-      const observation = getDb()
-        .prepare(
-          "SELECT local_path as localPath FROM workspaces WHERE company_id = ? AND local_path IS NOT NULL ORDER BY is_primary DESC, created_at ASC LIMIT 1",
-        )
-        .get(companyId) as { localPath: string } | undefined;
-      if (observation?.localPath) {
-        const candidate = joinWorkspaceRelative(observation.localPath, row.external_id);
-        if (candidate) {
-          try {
-            if (statSync(candidate).isFile()) {
-              return { kind: "path", value: candidate };
-            }
-          } catch {
-            // fall through to error below
-          }
+        firstCandidate ??= absolute;
+        if (fileExists(absolute)) {
+          return { kind: "path", value: absolute };
         }
       }
+
+      if (firstCandidate) {
+        return {
+          kind: "error",
+          reason: "path_missing",
+          detail: `No registered company workspace contains ${row.external_id}; first candidate was ${firstCandidate}`,
+        };
+      }
+
       return {
         kind: "error",
         reason: "workspace_unresolved",
-        detail: `workspace_id=${row.workspace_id ?? "null"} task_id=${row.task_id ?? "null"} run_id=${row.last_touched_by_run_id ?? row.created_by_run_id ?? "null"} — none led to a workspace with a local_path, and ${row.external_id} is not present in the company's observation workspace${observation?.localPath ? ` (${observation.localPath})` : " (no observation workspace exists)"}`,
+        detail: `workspace_id=${row.workspace_id ?? "null"} task_id=${row.task_id ?? "null"} run_id=${row.last_touched_by_run_id ?? row.created_by_run_id ?? "null"} — none led to a workspace with a local_path`,
       };
     },
 
diff --git a/src/main/ipc-core-read-handlers.ts b/src/main/ipc-core-read-handlers.ts
index 346cdd03..1cf583f5 100644
--- a/src/main/ipc-core-read-handlers.ts
+++ b/src/main/ipc-core-read-handlers.ts
@@ -76,7 +76,12 @@ export function registerCoreReadHandlers({
         no_target: "WORK_PRODUCT_NO_TARGET",
         workspace_unresolved: "WORK_PRODUCT_WORKSPACE_UNRESOLVED",
         path_escape: "WORK_PRODUCT_PATH_ESCAPE",
+        path_missing: "WORK_PRODUCT_PATH_MISSING",
       } as const;
+      if (target.reason === "path_missing") {
+        db.core.documents.updateWorkProduct(parsed.data.id, parsed.data.companyId, { status: "archived" });
+        publishDomainChanged();
+      }
       return fail(codeByReason[target.reason], target.detail);
     }
     if (target.kind === "url") {
diff --git a/tests/integration/work-products-lifecycle.spec.ts b/tests/integration/work-products-lifecycle.spec.ts
index 6da128e0..531e11fe 100644
--- a/tests/integration/work-products-lifecycle.spec.ts
+++ b/tests/integration/work-products-lifecycle.spec.ts
@@ -1,5 +1,6 @@
+import { mkdirSync, writeFileSync } from "node:fs";
 import { mkdtemp, mkdir, rm, writeFile, unlink } from "node:fs/promises";
-import { join } from "node:path";
+import { dirname, join } from "node:path";
 import { tmpdir } from "node:os";
 import { afterEach, describe, expect, it } from "vitest";
 import { AppDatabase } from "../../src/main/database";
@@ -107,6 +108,9 @@ async function createHarness(): Promise<Harness> {
 }
 
 function registerArtifact(harness: Harness, relativePath: string): string {
+  const absPath = join(harness.workspacePath, relativePath);
+  mkdirSync(dirname(absPath), { recursive: true });
+  writeFileSync(absPath, "tracked artifact", "utf8");
   return harness.db.core.documents.createWorkProduct({
     companyId: harness.companyId,
     taskId: harness.taskId,
@@ -179,6 +183,56 @@ describe("work_products archived visibility", () => {
       harness.db.close();
     }
   });
+
+  it("resolves workspace-prefixed filesystem rows through another company workspace when the bound root misses", async () => {
+    const harness = await createHarness();
+    try {
+      const parentPath = await createTempDir("agentcompany-parent-workspace-");
+      const projectPath = join(parentPath, "booking-app");
+      await mkdir(projectPath, { recursive: true });
+      await writeFile(join(projectPath, "AGENTS.md"), "instructions", "utf8");
+      harness.db.core.workspaces.saveWorkspace({
+        companyId: harness.companyId,
+        name: "Parent",
+        localPath: parentPath,
+        repoUrl: "",
+        repoRef: "",
+        isPrimary: false,
+      });
+
+      const id = harness.db.core.documents.createWorkProduct({
+        companyId: harness.companyId,
+        taskId: harness.taskId,
+        workspaceId: harness.workspaceId,
+        type: "file",
+        provider: "filesystem",
+        externalId: "booking-app/AGENTS.md",
+        title: "AGENTS.md",
+        url: null,
+        createdByRunId: harness.runId,
+      });
+
+      expect(
+        harness.db.core.documents.resolveWorkProductTarget(id, harness.companyId),
+      ).toEqual({ kind: "path", value: join(projectPath, "AGENTS.md") });
+    } finally {
+      harness.db.close();
+    }
+  });
+
+  it("reports missing filesystem rows when no company workspace contains the file", async () => {
+    const harness = await createHarness();
+    try {
+      const id = registerArtifact(harness, "docs/missing.md");
+      await unlink(join(harness.workspacePath, "docs/missing.md"));
+
+      expect(
+        harness.db.core.documents.resolveWorkProductTarget(id, harness.companyId),
+      ).toMatchObject({ kind: "error", reason: "path_missing" });
+    } finally {
+      harness.db.close();
+    }
+  });
 });
 
 describe("work_products bulk retirement", () => {