Cynthia-wlan9509/offline-game-revival

### An AI agent skill that brings shut-down mobile games back to life — fully offline, on a real phone.
When the servers die, the game shouldn't.
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Every year, hundreds of mobile games shut down. The APK still sits on players' phones — but without the server it can't log in, can't load a save, can't do anything. Years of stories, characters and memories become unreachable.
Offline Game Revival is a battle-tested playbook packaged as an Agent Skill. Point your coding agent (Claude Code and other agents that read SKILL.md) at a dead game's APK, and it knows how to turn it into a standalone memorial edition: install the APK, play the whole game, no network, no root, no PC, no runtime injection.
## ✨ What's inside
| 🩺 Can it be saved? | Before any patch, answer three questions within half a day: are the game's rules on the phone, is the game itself inside the APK, and how much server-side data can be recovered. Story, idle and card games usually can be saved; games whose battles are computed on the server, or that download the game itself after first launch, usually can't. |
| 🔍 Recon | Unpack the APK, find the real logic layer (Lua / JS / C# transpiled), identify encryption and resource-integrity checks. |
| 🧩 Anchor-asserted patching | One build entry point. Every code replacement asserts its anchor — if the upstream package changes, the build fails loudly instead of shipping a silently broken patch. |
| 🖥️ Local fake server | Intercept the HTTP/JSON layer and answer hundreds of endpoints from a local save. A methodology for mapping every endpoint's caller and what it reads, then generating safe defaults. |
| 📦 Repack & re-sign | Recompute engine cache checksums, rebuild resource tables, zipalign, sign. Includes a reverse-engineered cache-checksum algorithm and loader patches for LayaAir native. |
| ✅ On-device acceptance | "The screen opens" ≠ "it works". State must actually change and survive a cold restart. Tutorial-driven testing: follow the game's own guide steps with real taps. |
| 🎞️ Data rescue from screenshots & recordings (new) | Server-side numbers (shop prices, gacha rates, rewards, card stats) die with the server. scripts/harvest.py turns tens of GB of player screenshots and screen recordings into a few hundred KB of categorized text — keyframes → near-duplicate removal → local OCR → per-screen grouping — fully offline, zero tokens, then scripts/llm_structure.py batches it through DeepSeek / OpenAI / Qwen / Kimi / local Ollama into merged JSON + CSV. |
| ⏩ Time-travel tests (new) | scripts/timewarp runs your fake server in a sandbox with a virtual clock: fast-forward days, restart the app, and audit every reward — if a response says "+50 gems" but the save didn't change, it fails. Simulate 30 days of play in a second and see on which day each gate becomes reachable. Zero dependencies. |
| 🤝 Any agent, any model (new) | Works with Claude Code, Codex, Cursor, Copilot, OpenCode, Gemini CLI… via SKILL.md + AGENTS.md. Ships scout / worker / verifier sub-agent roles so an expensive model makes the calls and cheap ones do the legwork. No agent at all? Paste prompts/chat-playbook.md into DeepSeek / ChatGPT and run the commands it gives you. |