fix author git publication recovery

backend/src/workspaces/git-repository.ts

@@ -232,6 +232,10 @@ export class GitWorkspaceRepository {
     try {
       await this.git(["push", "origin", `${revision}:refs/heads/${this.config.branch}`]);
     } catch (error) {
+      // `git` already returns a sanitized WorkspaceRegistryError. Preserve it rather
+      // than mapping its public code a second time (notably git_push_rejected).
+      await this.restoreFailedPublication();
+      if (error instanceof WorkspaceRegistryError) throw error;
       throw this.sanitizeGitError(error);
     }
   }
@@ -239,9 +243,16 @@ export class GitWorkspaceRepository {
   /** Create a local publication commit without contacting the remote. */
   async commitOnly(paths: readonly string[], message: string): Promise<GitStatus> {
     if (paths.length === 0 || paths.some((path) => !this.isRegistryArtifactPath(path))) throw new WorkspaceRegistryError("workspace_invalid", "Workspace repository path is invalid");
-    await this.git(["add", "--", ...paths]);
-    await this.git(["commit", "-m", message], this.publicationIdentity());
-    return await this.status();
+    try {
+      await this.git(["add", "--", ...paths]);
+      await this.git(["commit", "-m", message], this.publicationIdentity());
+      return await this.status();
+    } catch (error) {
+      // A failed prepare must not leave staged or generated artifacts in the
+      // long-lived author checkout for the next request.
+      await this.restoreFailedPublication();
+      throw error;
+    }
   }
 
   /** Commit and push a fixed set of validated artifact paths without exposing Git output. */

backend/test/workspace-registry.test.ts

@@ -1142,9 +1142,7 @@ test("rejects a symbolic-link registry root before creating a lock below it", as
   const root = join(remote.root, "registry-link");
   mkdirSync(target);
   symlinkSync(target, root);
-  const registry = makeRegistry(config(root, remote.remote));
-
-  await expect(bootstrap(registry)).rejects.toMatchObject({ code: "git_unavailable" });
+  expect(() => makeRegistry(config(root, remote.remote))).toThrow("invalid sessions root");
   expect(existsSync(join(target, "locks"))).toBe(false);
 });
 

backend/test/workspace-runtime-handoff.test.ts

@@ -83,7 +83,7 @@ async function git(cwd: string, args: string[]): Promise<string> {
 }
 
 async function fixture(workspaceSource = filesystemWorkspace) {
-  const root = mkdtempSync(join(tmpdir(), "tht-runtime-handoff-"));
+  const root = realpathSync(mkdtempSync(join(tmpdir(), "tht-runtime-handoff-")));
   roots.push(root);
   const remote = join(root, "remote.git");
   const source = join(root, "source");