{"slug": "jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered", "title": "JevEmon: Typed Decisions over GBA RAM to Walk Pokémon FireRed", "summary": "Daniel Alfasi released JevEmon, an open-source project in which the Jev model from TypeSafe AI plays Pokémon FireRed by reading the game's overworld state directly from RAM rather than screenshots. JevEmon's pathfinder enumerates reachable destinations — doors, routes, and Pokémon Centers — and Jev returns a typed choice with a probability for each option; the run stops if the answer is illegal. Verified milestones include leaving the Player's House, crossing Pallet Town, traversing Route 1 while winning wild encounters, and reaching Viridian City, where the run currently ends; later legs such as Oak's Parcel and the first Gym are not yet built. The project requires a Mac with Apple Silicon, a user-supplied FireRed ROM, and a TypeSafe API key, and is licensed under GPL v3.0.", "body_md": "Jev walks a real Pokémon FireRed ROM.\n\n**Bring your own ROM, we don't ship it.**\n\nNot a screenshot agent. Not a bot that mashes A. Each leg of the walk, the code reads the overworld out of RAM, works out every place you could actually go from here — a door, a path to the next route, a Pokémon Center if your party needs one — and hands that list to [Jev](https://docs.typesafe.ai/models.md). Jev picks a destination; the code paths there and presses the buttons. If a wild Pokémon interrupts the walk, Jev fights it out with the same kind of typed decision, then the journey re-plans from wherever the encounter left you.\n\nMore on how this is wired: [ARCHITECTURE.md](https://github.com/daniel4x/JevEmon/blob/main/ARCHITECTURE.md)\n\nVerified milestones so far: Jev can leave the Player's House, cross Pallet Town, deliver itself through Route 1 (fighting and winning any wild encounters along the way), and reach Viridian City. Further legs of the journey (Oak's Parcel, the first Gym) aren't built yet — the walk currently ends the run once it reaches Viridian City.\n\nGrab a [TypeSafe API key](https://typesafe.ai) and put it in `.env`.\n\n```\ncp .env.example .env\n```\n\nDrop `Pokemon - Fire Red Version (U) (V1.1).gba` next to this README. Requires a Mac with Apple Silicon.\n\n```\nbrew install mgba ffmpeg uv\nuv run python scripts/setup.py\nuv run python -m jevemon --prepare\nuv run python -m jevemon\n```\n\nThat builds the checkpoint, starts the local server, and opens [http://127.0.0.1:8765](http://127.0.0.1:8765) for you. Hit Go live and sit with it. Edit the lineup in the page. Speed it up. Scrub the VOD after. Everything runs through `uv` — no shell wrapper scripts, no separate install step.\n\nOne walk, no browser:\n\n```\nuv run python -m jevemon --run --speed 4\n```\n\nOther useful commands:\n\n```\nuv sync                                    # just the Python environment\nuv run python -m jevemon --check-journey   # offline, no API calls\nuv run python -m jevemon --port 9000       # serve on a different port\n```\n\nNot the screen.\n\nA JSON snapshot of the overworld: where you are, your party's HP, and every destination the pathfinder already confirmed is reachable from here — each with how many times you've already visited it. During a wild encounter, the snapshot switches to the same battle state as any other fight: HP, types, moves, stats, abilities, PP, and only the legal moves and switches for that turn.\n\nJev answers with one choice and a probability for every option offered. If the answer is illegal, the run stops. There is no backup brain.\n\nOn the ROM, a switch is the Pokémon's personality value, not \"slot 3.\" The party menu moves around. Using the old slot would send out the wrong one. That note lives in [AGENTS.md](https://github.com/daniel4x/JevEmon/blob/main/AGENTS.md).\n\nEdit the starting lineup in `config.json` or the UI.\n\nThe interesting part isn't the exact team or the exact route. It's that a typed choice over honest game state — no screenshots, no free-text prompting — is already enough to walk an overworld and handle whatever interrupts it.\n\nFork it. Push the journey further. Teach it a destination beyond Viridian City, or a whole different region.\n\nThird-party dependencies and their licenses are in [NOTICE.md](https://github.com/daniel4x/JevEmon/blob/main/NOTICE.md).\n\nCopyright © 2026 Daniel Alfasi. Licensed under the GNU General Public License v3.0 — see [LICENSE](https://github.com/daniel4x/JevEmon/blob/main/LICENSE).", "url": "https://wpnews.pro/news/jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered", "canonical_source": "https://github.com/daniel4x/JevEmon", "published_at": "2026-09-21 13:29:46+00:00", "updated_at": "2026-09-21 13:54:20.360923+00:00", "lang": "en", "topics": ["ai-agents", "ai-products", "ai-tools", "large-language-models"], "entities": ["JevEmon", "Jev", "TypeSafe AI", "Daniel Alfasi", "Pokémon FireRed", "Viridian City", "Pallet Town", "Route 1"], "alternates": {"html": "https://wpnews.pro/news/jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered", "markdown": "https://wpnews.pro/news/jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered.md", "text": "https://wpnews.pro/news/jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered.txt", "jsonld": "https://wpnews.pro/news/jevemon-typed-decisions-over-gba-ram-to-walk-pokemon-firered.jsonld"}}