Lukas Carelsen
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Top secret
World 04 · SH-4 · Classified

Steelhead

Mission ████████ ███ ██████.

An AI assistant for a niche market. Hand-coded end to end, and now going agentic.

  • React Native 0.80
  • TypeScript
  • Zustand
  • OpenAI Realtime
  • WebRTC
  • Fastify
  • Prisma
  • PostgreSQL
  • Sentry
Clearance required

Descent log

  1. Alt 120 km~17,500Lines of TypeScript
  2. Alt 98 km~10,900Lines of TypeScript
  3. Alt 75 km17Screens
  4. Alt 53 km85Commits
  5. Alt 30 kmiOS + AndroidPlatforms
  6. Alt 8 km████████Market

Aerial survey · By hand, no satellite· Satellite imagery

Classified
Frame 01 · ████████████
Classified
Frame 02 · ████████████
Classified
Frame 03 · ████████████

Uncharted · Plant a flag to put a satellite upFlag planted · Satellite up

Classified

Field log · SH-4

Dossier. Most of this file is classified.

Steelhead is an assistant for a niche market. ████████ ██████ ███ █████████ ██ ████ ███████ ███ ██████.

What can be said

  • Hand-coded, end to end. The app, the API client, the stores, the navigation and the backend were written by hand. No generators, no low-code.
  • Voice, in real time. You talk to it and it talks back: audio streams both ways over WebRTC and WebSockets to OpenAI’s realtime models, brokered by our own server.
  • Now going agentic. The assistant already calls tools in the middle of a conversation, and a response gate decides when it speaks. The next step is longer flows: it plans, acts and checks its own work.
  • Built to be trusted. Sentry on both ends, security linting, secret scanning and dependency checks in CI.

Redacted

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Landing zone · SH-4

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Achievement unlocked

Logbook 0/54

  1. First touchdownLand the ship anywhere on the page
  2. Secret unlockedWin the landing game (press L)
  3. Meteor dodgerBeat Level 2, the meteorites
  4. RickrolledWin the prize for winning the mini-gameSecret achievement
  5. Double rickrolledWatch the real prize for beating Level 2Secret achievement
  6. Crash test dummyCrash the ship in the game
  7. Lost in spaceDrift off the bottom of the screen
  8. Knock knockLand on the black site
  9. Cleared for entryEarn the black site’s clearance
  10. Inside the black siteOpen the black site’s doors
  11. Twin lasersGet the ship’s first upgrade
  12. Mega laserGet the ship’s second upgrade
  13. Lock-on turretAiring’s first anti-air upgrade
  14. Lock missilesAiring’s second anti-air upgrade
  15. Torpedo hatchSteelhead’s first underwater upgrade
  16. Sonar cannonSteelhead’s second underwater upgrade
  17. Drone swarmCapital Copilot’s first anti-kaiju upgrade
  18. Mech frameCapital Copilot’s second anti-kaiju upgrade
  19. Ice armourTrade blue crystals at STN-2
  20. Rose shieldTrade pink crystals at STN-2
  21. Saved by the shieldLet the shield take a meteorite
  22. ClangLet the armour take a hit
  23. First crystalMine a crystal from STN-2
  24. First bloodBeat the creatures on a world
  25. Flag plantedConquer a world
  26. Four worldsConquer every world
  27. Base onlineBring a world’s base online
  28. Civilization IIA town reaches Era I
  29. Civilization IIIA town reaches Era II
  30. Civilization IVA town reaches Era III
  31. Civilization VReach Era IV with a neighbouring world
  32. Galactic festivalGet every town to Era II
  33. Station upgradeFinish a station’s first upgrade
  34. Joint ventureTwo worlds finish an advanced upgrade
  35. MaydaySave the tug crew at STN-1
  36. Cut looseCatch the drifting spacewalker at STN-3
  37. SOS receivedPick up the signal from Jupiter
  38. Astronaut rescuedAnswer the SOS
  39. Into the giantFly into the gas giant
  40. Instrument makerBuild an instrument at the outpost
  41. Full kitBuild all eight outpost instruments
  42. Gate 1 · WebBuild Web’s launch pad
  43. Gate 2 · AppsBuild Apps’ space elevator
  44. Gate 3 · AIBuild AI’s elevator and mission control
  45. All gates openOpen Web, Apps and AI
  46. LiftoffLaunch a rocket from the spaceport
  47. SnapshotLand on a survey photo and sit still
  48. Off and on againFix the broken ad sat over Airing
  49. World 1 surveyedPhotograph every frame on CC-1, Capital Copilot
  50. World 2 surveyedPhotograph every frame on NR-2, NoRespawn
  51. World 3 surveyedPhotograph every frame on AR-3, Airing
  52. World 4 surveyedPhotograph every frame on SH-4, Steelhead
  53. CartographerPhotograph every frame on every world
  54. Eyes onlyPhotograph a classified frameSecret achievement