[earakely-scale]

Summary

Computer apps exported before 0.9.1457 no longer boot on 0.9.1457 or later. Their generated app code calls app_data.get(self.paths, write_namespace). The browser data plane (#512) changed the signature to get(paths, paused, write_namespace). So data/get raises get() missing 1 required positional argument: 'write_namespace', and the computer's first-boot probe fails.

This restores the original signature, and keeps #512's behaviour without callers passing anything:

• get(paths, write_namespace) is back as it was before feat(website-browser): the browser's data plane, data/add, data/get and data/reset (FD-4942) #512.
• get freezes the app itself while it copies the files. It calls a new module-level app_runtime.paused_app(), which stops the launched app's process group with SIGSTOP and continues it after; it does nothing when no app is running.
• AppRuntime.paused now delegates to paused_app(), so the website browser's use of it is unchanged.
• The data plane no longer passes paused.

Every caller now gets the one-moment copy #512 introduced, including exported apps' own data/get hooks.

Test plan

• New test: get(paths, None), called directly as exported apps do, returns the file and pauses and continues the running app.
  • On main it fails with the TypeError above.
  • On this PR's first commit, where the pause was an optional keyword, it fails because nothing is paused.
• test_an_export_copies_the_paths_with_the_app_paused_and_sends_the_copy_once_it_runs_again still passes.
• packages/agentenv-protocol/tests: 1298 passed, 1 skipped.
• ruff check is clean.

🤖 Generated with Claude Code

Confidence Score: 5/5

The PR appears safe to merge; no blocking issue was found.

Summary

Restores the two-argument app_data.get(paths, write_namespace) call used by older exported apps.

• Older computer app exports can request files without breaking startup.

_{Reviews (2) · Last reviewed commit: "fix(computer): get pauses the running ap..." · Reviewed by Greptile}