Flask backend for server-side Python execution#250

Merged

milanofthe merged 27 commits intomainfrom

feature/flask-backend

Feb 11, 2026

Commits on Feb 10, 2026

Add REPL worker subprocess for Flask backend

milanofthe
and
KDW1
committed
Add Flask server and fix worker threading for Windows subprocess pipes

milanofthe
and
KDW1
committed
Add FlaskBackend class implementing Backend interface via HTTP/SSE

milanofthe
and
KDW1
committed
Integrate FlaskBackend into registry with URL param switching

milanofthe
and
KDW1
committed
Add dynamic package installation from PYTHON_PACKAGES config

milanofthe
and
KDW1
committed
Update README with Flask backend documentation

milanofthe
and
KDW1
committed
Add backend protocol and toolbox integration spec docs

milanofthe
and
KDW1
committed
Add spec doc references to README

milanofthe
and
KDW1
committed
Remove dead code from worker.py and FlaskBackend

milanofthe
and
KDW1
committed
Add pip-installable package with CLI and auto-detection

milanofthe
and
KDW1
committed
Fix streaming, logging, and review issues for Flask backend

milanofthe
and
KDW1
committed
Add exec/eval timeout watchdog (30s worker, 35s server)
milanofthe
committed
Use waitress as production WSGI server, keep Flask dev server for --debug
milanofthe
committed
Replace sleep-based browser open with health check polling
milanofthe
committed
Add worker crash recovery with auto-reinit on next request
milanofthe
committed
Add pytest test suite and CI workflow (22 tests)
milanofthe
committed
Use pyproject.toml as single source of truth for version
milanofthe
committed
Add network security warning when binding to 0.0.0.0
milanofthe
committed
Share session across tabs via localStorage + BroadcastChannel
milanofthe
committed
Remove shell=True from build script, use explicit npx binary resolution
milanofthe
committed
Fix stream stop→exec crash: wait for reader thread before stdout reads
milanofthe
committed
Fix stop→restart hang: actively stop streaming in wait_for_stream_reader
milanofthe
committed
Keep final stream data in queue so frontend can poll it before restart
milanofthe
committed

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Flask backend for server-side Python execution#250

Flask backend for server-side Python execution#250
milanofthe merged 27 commits intomainfrom
feature/flask-backend

Commits on Feb 10, 2026

Add REPL worker subprocess for Flask backend

Add Flask server and fix worker threading for Windows subprocess pipes

Add FlaskBackend class implementing Backend interface via HTTP/SSE

Integrate FlaskBackend into registry with URL param switching

Add dynamic package installation from PYTHON_PACKAGES config

Update README with Flask backend documentation

Add backend protocol and toolbox integration spec docs

Add spec doc references to README

Remove dead code from worker.py and FlaskBackend

Add pip-installable package with CLI and auto-detection

Fix streaming, logging, and review issues for Flask backend

Add exec/eval timeout watchdog (30s worker, 35s server)

Use waitress as production WSGI server, keep Flask dev server for --debug

Replace sleep-based browser open with health check polling

Add worker crash recovery with auto-reinit on next request

Add pytest test suite and CI workflow (22 tests)

Use pyproject.toml as single source of truth for version

Add network security warning when binding to 0.0.0.0

Share session across tabs via localStorage + BroadcastChannel

Remove shell=True from build script, use explicit npx binary resolution

Fix stream stop→exec crash: wait for reader thread before stdout reads

Fix stop→restart hang: actively stop streaming in wait_for_stream_reader

Keep final stream data in queue so frontend can poll it before restart

Commits on Feb 11, 2026

Add virtualenv isolation for Flask backend workers

Fix CI: ensure venv exists before app tests spawn workers

Fix CI: handle missing numpy in fresh venv without simulation packages

Consolidate duplicated exec/eval routes and init logic

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