chore(repo): expose PR sync script (#2595)

AGENTS.md

@@ -70,6 +70,11 @@ pnpm rust:check         # same as above
 # whisper-rs / llama.cpp on macOS Tahoe (Apple Silicon) fail with `-mcpu=native`.
 # Workaround for `cargo check`/`cargo test`:
 GGML_NATIVE=OFF cargo check --manifest-path Cargo.toml
+
+# PR maintenance
+pnpm pr:sync-main --help        # inspect options
+pnpm pr:sync-main               # dry-run: scan open PRs targeting main
+pnpm pr:sync-main --execute     # merge latest main into each matching PR branch and push
 ```
 
 **Tests**: Vitest in `app/` (`pnpm test`, `pnpm test:coverage`); Rust via `pnpm test:rust` (runs `scripts/test-rust-with-mock.sh`).

package.json

@@ -31,6 +31,7 @@
     "merge-pr": "bash scripts/shortcuts/review/merge.sh",
     "mock:api": "node scripts/mock-api-server.mjs",
     "pr:checklist": "node scripts/check-pr-checklist.mjs",
+    "pr:sync-main": "node scripts/merge-main-into-open-prs.mjs",
     "rabbit": "bash scripts/rabbit/cli.sh",
     "reset": "bash scripts/shortcuts/ws-reset.sh",
     "deep-work": "bash scripts/deep-work/cli.sh",