Hyperion Delta

Rollback that scales with what you changed.

Local agents edit files, run tests, fail, and backtrack. Hyperion makes undoing mistakes 55,000x faster than Git by restoring only the files your agent touched — not your entire repository.

npm install hyperion-delta

const session = new HyperionAgentSession(process.cwd());
const attempt = await session.runAttempt(async ({exec}) => {
  await exec("npm", ["test"]);
});
await session.promote(attempt.checkpointId);
await session.dispose();

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Why Hyperion

Dirty-Set Rollback

Scales with what your agent changed, not your entire repository. Git reset inspects the whole working tree. Hyperion only touches the files in the dirty set — roll back in microseconds.

Zero-Config VFS Interception

Installs a single hook. Every writeFile, rename, unlink, and stream mutation is automatically tracked. No decorators, no manual bookkeeping.

Multi-Tier Storage

tmpfs dirty-set on Linux, POSIX hard links on macOS, NTFS links on Windows, pure manifest everywhere. Auto-selects the fastest safe strategy for your platform.

Safety Guarantees

Reconcile firewall catches native-tool writes before rollback. Atomic restore via temp-file rename. Loud integrity errors — never silent corruption.