feat(arcade-cli): deploy Cloudflare Python (Pyodide) workers (PLT-2154)

[pmdroid]

Adds the client side of Cloudflare Python (Pyodide) worker deployment. Tracked by PLT-2154.

What's here

A new --runtime python path on arcade deploy:

• Packages the worker directory as a zip (create_zip_archive) instead of tar.gz. Entries are stored relative to the project root (no top-level dir), so a --entrypoint src/worker.py resolves inside the archive. The engine detects a Python worker by the zip container and uploads each file as its own Worker module.
• Sends host=cloudflare + runtime=python on CreateDeploymentRequest, with the bundle entrypoint set to the .py main module.
• Skips local validation. A Pyodide worker.py (from workers import WorkerEntrypoint) can't run under plain CPython, so the usual "start the server and hit /worker/health" step would always fail. --runtime python therefore requires --server-name/--server-version, like --skip-validate.

The default (--runtime auto) is unchanged: tar.gz + local validation + the existing Porter path. host/runtime are sent only via model_dump(exclude_none=True), so the default payload is byte-for-byte identical.

# From a Cloudflare Python worker dir (after `pywrangler sync` vendors python_modules/):
arcade deploy --runtime python -e src/worker.py --server-name my-worker --server-version 1.0.0

Why no engine change here

The engine's JSON /deployments create path already routes by host/runtime and detects Python from the bundle's .py entrypoint (PLT-2153), so the CLI only needs to produce the right request + zip.

Testing

ruff format/ruff check/mypy clean; libs/tests/cli/deploy/test_deploy.py passes (30 tests). New tests cover the zip archive (relative paths, exclusions, zip magic), the request model (host/runtime omitted by default, included for Cloudflare), and the end-to-end deploy_server_logic Python path (zips, skips validation, sends host=cloudflare/runtime=python with the .py entrypoint). Bumped arcade-mcp to 1.16.0.

Out of scope / follow-ups

• Auto-detecting Cloudflare from a wrangler.jsonc (explicit --runtime python for now).
• Vendoring python_modules (the user runs pywrangler sync first; the CLI zips what's present).
• A real end-to-end deploy through a live engine + Cloudflare account.

🐕 Written by Kyoto, an AI agent, on Pascal's behalf —

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Note

Medium Risk
New deploy routing and packaging path affects engine integration; default deploy behavior is preserved via exclude_none, but misconfigured Cloudflare deploys could fail at runtime without local validation catching issues.

Overview
Adds arcade deploy --runtime python for Cloudflare Python (Pyodide) workers, alongside the unchanged default auto path (tar.gz + local validation).

For python, the CLI builds a zip with flat paths (via new create_zip_archive), skips local health/metadata validation, and on create sends host=cloudflare and runtime=python using model_dump(exclude_none=True) so default deploy payloads stay the same. Tar.gz packaging now shares exclusion logic through _is_excluded_archive_path.

main.py requires --server-name / --server-version when using --runtime python (same as --skip-validate) and treats secrets auto as skip in that case. Tests cover zip packaging, request fields, and the end-to-end Cloudflare deploy path; arcade-mcp is bumped to 1.16.0.

^{Reviewed by Cursor Bugbot for commit b11820b. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

❌ Patch coverage is 78.04878% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
libs/arcade-cli/arcade_cli/deploy.py	86.48%	5 Missing ⚠️
libs/arcade-cli/arcade_cli/main.py	0.00%	4 Missing ⚠️

Files with missing lines	Coverage Δ
libs/arcade-cli/arcade_cli/main.py	32.22% <0.00%> (-0.22%)	⬇️
libs/arcade-cli/arcade_cli/deploy.py	59.81% <86.48%> (+12.79%)	⬆️

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