INONONO/fable-5.1-mario-trajectory

🍄 Super Fable Bros. — Claude Fable 5.1 Agent Trajectory

The complete, unedited coding-agent session in which Claude Fable 5.1 (claude-fable-5-1 — mind the minor version, the point-one is the whole point) one-shotted a playable Super Mario Bros. World 1-1 remake in a single HTML file — zero dependencies, zero external assets, WebAudio chiptune synth, hand-encoded pixel sprites.

• 🎮 Play the result: https://inonono66.github.io/fable-5.1-mario/
• 💻 Code repo: https://github.com/INONONO66/fable-5.1-mario

Contents

trajectory.jsonl — the raw Claude Code session log (session fcef6964-8486-4c0c-964c-4768ee9d4027), one JSON event per line:

Event type	Count	What it is
user	51	User prompts + tool results fed back to the model
assistant	95	Model turns (text + tool calls), model claude-fable-5-1
attachment	61	File/context attachments
others	~116	Session metadata (mode, snapshots, cost state, ...)

Load it

import json

with open("trajectory.jsonl") as f:
    events = [json.loads(line) for line in f]

turns = [e for e in events if e["type"] in ("user", "assistant")]

Provenance

Recorded 2026-09-01 with Claude Code. No human wrote any of the game code; the full prompt→tool-call→edit loop is preserved here verbatim.