Function deriveLegacyCodeSourceId

bin/gstack-gbrain-sync.ts:373–382

* Pre-pathhash source id, kept for orphan detection only. * * Earlier /sync-gbrain versions registered `gstack-code- ` (no pathhash * suffix). On a multi-worktree repo, those collapsed onto a single source id * with last-sync-wins semantics. The new path-keyed id leaves the legacy * source

(repoPath: string)

 * sync from any worktree of this repo, so users don't accumulate orphans.
 */
function deriveLegacyCodeSourceId(repoPath: string): string {
  const remote = canonicalizeRemote(originUrl());
  if (remote) {
    const segs = remote.split("/").filter(Boolean);
    const slugSource = segs.slice(-2).join("-");
    return constrainSourceId("gstack-code", slugSource);
  }
  const base = repoPath.split("/").pop() || "repo";
  return constrainSourceId("gstack-code", base);
}

/**
 * Pre-#1468 path-only-hash source id, kept for hostname-fold migration only.