diff --git a/bin/gstack-memory-ingest.ts b/bin/gstack-memory-ingest.ts
index a359d118..1913df32 100644
--- a/bin/gstack-memory-ingest.ts
+++ b/bin/gstack-memory-ingest.ts
@@ -34,8 +34,9 @@
  * keep V1 ship-tight. See TODOS.md.
  *
  * V1.5 NOTE: When `gbrain put_file` ships in the gbrain CLI (cross-repo P0 TODO),
- * transcripts will route to Supabase Storage instead of put_page. Until then, all
- * content rides put_page; gbrain's native dedup keys on session_id.
+ * transcripts will route to Supabase Storage instead of the page-write path.
+ * Until then, all content rides `gbrain put <slug>` (stdin, YAML frontmatter for
+ * title/type/tags); gbrain's native dedup keys on session_id.
  */
 
 import {
@@ -745,14 +746,25 @@ function buildArtifactPage(path: string, type: MemoryType): PageRecord {
   };
 }
 
-// ── Writer (calls gbrain put_page) ─────────────────────────────────────────
+// ── Writer (calls `gbrain put`) ────────────────────────────────────────────
 
 let _gbrainAvailability: boolean | null = null;
 function gbrainAvailable(): boolean {
   if (_gbrainAvailability !== null) return _gbrainAvailability;
   try {
     execSync("command -v gbrain", { stdio: "ignore" });
-    _gbrainAvailability = true;
+    // gbrain v0.27 retired the legacy `put_page` flag-form for `put <slug>`
+    // (content via stdin, metadata as YAML frontmatter). Probe `--help` for
+    // the `put` subcommand so we surface a single clean error here rather
+    // than failing every page with "Unknown command: put_page". The regex
+    // anchors on the indented subcommand format gbrain's help actually uses
+    // ("  put   ..."), not any whitespace-bordered "put" word in prose.
+    const help = execFileSync("gbrain", ["--help"], {
+      encoding: "utf-8",
+      timeout: 5000,
+      stdio: ["ignore", "pipe", "pipe"],
+    });
+    _gbrainAvailability = /^\s+put\s/m.test(help);
   } catch {
     _gbrainAvailability = false;
   }
@@ -761,12 +773,17 @@ function gbrainAvailable(): boolean {
 
 function gbrainPutPage(page: PageRecord): { ok: boolean; error?: string } {
   if (!gbrainAvailable()) {
-    return { ok: false, error: "gbrain CLI not in PATH" };
+    return { ok: false, error: "gbrain CLI not in PATH or missing `put` subcommand" };
   }
-  // gbrain CLI verb is `put <slug>`; it does NOT accept --title / --type /
-  // --tags flags. (`put_page` is the MCP tool name, not the CLI subcommand.)
-  // Inject title/type/tags into the YAML frontmatter that page.body already
-  // begins with so gbrain's frontmatter parser picks them up.
+  // gbrain v0.27+ uses `put <slug>` (positional, content via stdin) instead
+  // of the legacy `put_page` flag form. Metadata rides as YAML frontmatter:
+  //  - When the page body already starts with frontmatter (transcripts), inject
+  //    title/type/tags into the existing block so gbrain's frontmatter parser
+  //    picks them up.
+  //  - When the page body has no frontmatter (raw artifacts: design-docs,
+  //    learnings, builder-profile-entries), wrap with a fresh frontmatter
+  //    carrying the same fields. Without this branch, artifact pages would
+  //    land in gbrain with empty title/type/tags.
   let body = page.body;
   if (body.startsWith("---\n")) {
     const end = body.indexOf("\n---\n", 4);
@@ -779,6 +796,16 @@ function gbrainPutPage(page: PageRecord): { ok: boolean; error?: string } {
       ].join("\n");
       body = body.slice(0, end) + "\n" + inject + body.slice(end);
     }
+  } else {
+    body = [
+      "---",
+      `title: ${JSON.stringify(page.title)}`,
+      `type: ${page.type}`,
+      `tags: [${page.tags.map((t) => JSON.stringify(t)).join(", ")}]`,
+      "---",
+      "",
+      body,
+    ].join("\n");
   }
   try {
     execFileSync("gbrain", ["put", page.slug], {