Environment

• gstack 1.26.4.0 (~/.claude/skills/gstack/VERSION)
• gbrain 0.18.2
• Linux, bun runtime

Reproducer

$ gbrain --version
gbrain 0.18.2
$ gbrain --help | grep -A 1 PAGES
PAGES
  get <slug>                         Read a page
  put <slug> [< file.md]             Write/update a page
$ echo "hi" | gbrain put_page --slug test --type note
Unknown command: put_page
Run gbrain --help for available commands.

Result: every transcript ingest fails. In a fresh setup with 292 transcripts queued, all 292 hit [put-error] ... Unknown command: put_page and nothing lands in the brain.

Expected

gstack-memory-ingest should use the canonical gbrain page-write subcommand and successfully ingest pages.

Actual

bin/gstack-memory-ingest.ts:768 builds the args array with the literal "put_page":

const args = [
  "put_page",
  "--slug", page.slug,
  "--title", page.title,
  "--type", page.type,
  "--tags", page.tags.join(","),
];
execFileSync("gbrain", args, { ... });

put_page is the gbrain <=0.17 name. gbrain >=0.18 renamed it to put (same flags, same stdin contract for the body).

Suggested fix

One-line change at bin/gstack-memory-ingest.ts:768: "put_page" -> "put". The rest of the call site (flags, stdin body, timeouts) is unchanged. PR to follow.