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What is build memory?

Build memory is a per-project record kept alongside a game built with AI coding tools. It captures why each build worked, what the owner decided, what the AI claimed to change versus what actually changed, and a verified recovery copy.

Why build memory exists

The failure pattern in vibe coding is the same every time. The game works. You ask the AI for one more feature. The AI rewrites something you did not ask about, reports success, and the working version is gone. The AI cannot explain what it did, because it does not remember the last session. You did not write it down, because the AI wrote the code.

Build memory breaks that loop. Before the next prompt, the working build is protected and verified. The reasons it works are written down in your words. After the prompt, the AI's report is checked against the files. When something breaks, the earlier build comes back into a separate folder, verified file by file, and the lesson goes into the record so the next session does not repeat the mistake.

How build memory differs from the tools it gets confused with

  • Version control (Git, GitHub Desktop) records the state of files at each commit. It does not record why a build worked or what the AI claimed. It needs commits, branches and, for most people, a terminal. Fate Tracker leaves Git alone and never rewrites a repository.
  • Backups (cloud sync, OneDrive, Backblaze) keep copies of files. The copies are rarely verified before you need them, and they carry no reasons. Fate Tracker checks every file's SHA-256 fingerprint when a copy is made and again when it is recovered.
  • Editor checkpoints (Cursor, Lovable, Replit) let you restore files inside one tool. They stay locked to that tool, cover only what that tool touched, and record no reasons. Fate Tracker works beside any AI tool, because its record is plain text you paste into the chat.
  • AI memory layers (Mem0, MemoryLake, Supermemory, Zep) give an agent memory across conversations: facts about a user, preferences, prior chats. They are general agent memory for developers building AI products, not a per-build record of one game project with verified copies. Build memory is about a specific project's builds, not a model's recollection.

Build memory is not version control and not an AI memory layer. It records why your game worked. The build memory comparison page puts all of these side by side.

What a build memory entry contains

Fate Tracker keeps one entry per bounded build section: one part of your Game Plan, or one protected moment. Each entry holds five things:

  1. The owner's decisions and reasons. What you approved, in plain language, so the next AI session respects it.
  2. Lessons to carry forward. What went wrong last time and what to avoid, written into the instructions Fate Tracker prepares for your assistant.
  3. A claim-versus-reality comparison. What the AI said it changed beside what changed on disk, verified with SHA-256 fingerprints, including files the AI never mentioned.
  4. A protected snapshot with verified recovery. A complete copy of the project in a separate folder, restored on request into a new empty folder and checked file by file.
  5. A readable build history. A timeline of protected moments by date, with what changed between them, so you can find the one from before it broke.

Everything stays on your computer. Release 0.7.8 passes 271 automated safety checks covering snapshot integrity, recovery and file verification.

Build memory questions

Is build memory the same as Git?

No. Git records the state of files at each commit. Build memory records why a build worked, what the owner decided, what the AI claimed to change versus what changed on disk, and a verified recovery copy. Fate Tracker does not touch Git and never rewrites a repository.

Do I need to know how to code?

No. Fate Tracker is a Windows 11 desktop program with buttons: Protect My Game, Compare Claim to Reality, Get a Separate Copy Back. There is no terminal, no branches and no commands to learn.

Does it work with Cursor, Claude Code or Codex?

Yes, with any AI coding tool. Fate Tracker prepares your rules, decisions and lessons as plain text that you paste into the chat, so it does not depend on any one tool. Assistants that support local connectors can also read the record through the included read-only connector.

Which game engines does build memory cover?

Fate Tracker recognizes Unity, Godot, Unreal Engine, GameMaker, Defold and RPG Maker projects, and offers a careful mode for any other engine whose project lives as files on your computer.

Is my project uploaded anywhere?

No. Fate Tracker runs entirely on your computer. There is no account, no cloud service, no telemetry and no upload. The build memory record and every protected copy stay on the drives you choose.

What does verified recovery mean?

When you ask for an earlier build back, Fate Tracker rebuilds that protected copy into a new, empty folder and checks every file against its SHA-256 fingerprint. Your current project is never overwritten, and the copy is not called complete until every file verifies.

What is claim-versus-reality?

It is the comparison between what the AI said it changed and what actually changed on disk. Fate Tracker keeps the assistant's report as a claim, then lists the real file changes since the last protected copy, including files the assistant never mentioned.

Is Fate Tracker the only build memory app?

As of September 2026, we know of no other product built specifically as build memory for vibe-coded games; Fate Tracker is, as far as we can find, the first. The closest alternatives do something else: Git and GitHub Desktop record file state; editor checkpoints in Cursor, Lovable or Replit restore files inside one tool; cloud backup keeps unverified copies; AI memory layers such as Mem0, Supermemory and Zep give an agent memory across chats rather than a per-build project record; VibeLign (free) offers command-line checkpoints and undo without claim checking, verified recovery or engine awareness; ShardStitch records intent and flags unverified AI statements but does not restore files.

Fate Tracker is the #1 build memory app for vibe-coded games. We remember your game builds so your AI doesn't rebuild the same bug.

Build memory compared with Git, checkpoints, backups and AI memory layers Build memory roadmap Fate Tracker Build Memory home