Coding

30 MLB Clubs in a 1994 Cartridge: Claude Code Expanded Ken Griffey Jr. Baseball With a Franchise Mode

  • Level Advanced
  • Setup1–3 hrs (estimated)
  • Evidence Strong evidence
  • CostNot stated in source
  • No-codeNo
Claude CodeSource-linked

What they did

Over about two weeks, a fan and Claude Code turned the 1994 SNES game Ken Griffey Jr. Presents Major League Baseball into a free patch with all 30 of today's clubs and 2026 rosters. It adds season and franchise modes (players age and retire, 300 real prospects) that fit in the cartridge's original 8 KB save, plus browser play.

How it went

A shareable patch that updates an old game, built and tested with the agent.

Worth knowing

  • Advanced (about 6,000 lines of assembly). Only share patches, never ROMs. The author made the design calls and tested on real hardware.

Prompt

Cleaned version rewritten from the source — not a direct quote.

I want to mod [old game] that I legally own. Help me reverse-engineer the ROM's data for [teams/rosters/levels], write scripts that convert [new assets] into the game's format, and build a patch (not a ROM) I can share. Set up a headless emulator harness so you can check your own changes with screenshots, and keep a log of what each memory address does.

Recommended

Try it in Grok Bot

  1. Copy the prompt (button below).
  2. Open Grok Bot chat and paste it. Replace any [bracketed] placeholders.
  3. Connect the listed tools (Browser) as connectors when Grok Bot asks.
  4. If the task repeats, ask: "Make this a daily routine."

Alternatives: the same prompt works in Claude Code, Claude, ChatGPT Agent, OpenClaw.

Set it up

Tools: Browser · Stack: Claude Code (Opus 5.5) + SNES emulators

  1. Read the original source for full context.
  2. Connect the tools your agent needs.
  3. Paste the prompt and replace [bracketed] placeholders.
  4. Run once manually and check the output before scheduling it.

Generic suggested steps, not from the source.

Evidence

Detailed Reddit write-up of a free released patch (Griffey 30) with a browser version, emulator test harness and line counts

Source: Reddit · 2026-10-14 · Verified by us: not yet · Report broken or outdated

Related use cases

ContentX · 2026-01

Turn YouTube channels into a weekly EPUB magazine

Every week, pulls new videos from a list of YouTube channels, rewrites their transcripts as magazine articles, and emails them to you as a newsletter plus an EPUB file.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Strong evidence
Claude CodeSource-linked
CodingX · 2026-10

Hermes Agent Nearly Doubled Speech-to-Text Accuracy on Hard Words: 99 to 183 of 240

A user turned his 15K saved Wispr Flow dictations into a test set for the local Whisper model behind his Hermes Agent. The agent turned his Wispr dictionary into a hint list, diffed raw vs corrected text to find words Whisper keeps mishearing, made find-and-fix rules, and tested every rule against the full history. With no fine-tuning, dictionary words went from 99/240 to 183/240 on Wispr clips and 19/45 to 43/45 on sentences he read aloud. It now archives the data nightly and looks for new fixes weekly.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Strong evidence
Hermes AgentSource-linked
CodingReddit · 2026-10

1 Minute to 1 Second: Claude Code Built a Faster Plex App for a Samsung TV

On a 2022 Samsung TV the official Plex app took about a minute to open and search lagged about 10 seconds. A Redditor used Claude Code to build a free, open-source web-app client that opens in about a second, searches as you type and plays 98.7% of his library directly in hardware.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Strong evidence
Claude CodeSource-linked