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KESTREL-9 // THE DEVELOPER PROTOCOL

Learn Python.
Save the ship.

A 30-day mission where real code brings a dead spaceship back to life. Wake the reactor. Route power. Kill the tumble. Call home.

Start Day 1 free See the Bridge
✓ Days 1–3 free✓ $19 once✓ Yours forever

A real ship,
not a sandbox

The probe KESTREL-9 is dark and tumbling. You have a hardline to her flight computer. import ship and bring her back — state persists, mistakes trip breakers, and the exterior camera shows it all.

NO QUIZZES. NO FLUFF.

30 days,
one protocol

Variables to files to APIs to a capstone you design. Boss terminals at days 7, 14 and 21. Real code runs in a sandboxed interpreter with real tracebacks — errors are curriculum, not failure.

CODE. RUN. FIX. REPEAT.

Progress that
fights back

XP, ranks, streaks that freeze instead of reset, achievements with teeth, and a campaign map that lights up as you clear it. Finish and graduate with a certificate and Developer Mode.

EARN IT. PROVE IT.
BRIDGE • COLD BOOT LS 20 · GYRO 40 · COMMS 10 · LIGHTS 10 MW
KESTREL-9 exterior camera view after recovery
⚡ 100 MW↻ 0 °/s⇅ UPLINK LIVE

MISSION: COLD BOOT

Sector Control lost KESTREL-9's carrier wave 61 hours ago. Telemetry shows the reactor scrammed and the probe is tumbling. Bring her back, one system at a time.

  • [ ] Wake the flight computer +20
  • [ ] Restart the reactor +30
  • [ ] Route the power +30
  • [ ] Kill the tumble +30
  • [ ] Call home +40
HARDLINE CONSOLECtrl/⌘+Enter runs on board
> ▶
30Days of missions
Real PythonNo shortcuts
Live codeRuns on board
Forever yoursNo subscription
$19 onceFull 30-day campaign
Day 1 freeStart immediately

THE MISSION CONTINUES

Learn by operating something that reacts to you.

KESTREL-9 turns Python fundamentals into ship operations: state, systems, telemetry, debugging, and progression. Days 1–3 are free with no card. If the protocol is for you, one $19 payment unlocks all 30 days, the bonus arcade, the capstone, and graduation. No subscription, no upsells.

Enter the Bridge