SeedHammer — fork build artifacts

Composers, emulators, Android companion, and unsigned firmware. Built from seedhammer-features.

Four metal plates engraved on a SeedHammer II: a 16x26 block-text plate with a custom title, a Nostr nsec plate with QR code, and a plate carrying an SVG-engraved Bitcoin symbol with its own custom title.

Composer

Phone-side block-text + SVG plate composer (cmd/webnfc).

Combined simulator

Composer with the firmware emulator wired beside it — tap and watch (cmd/webnfc-sim).

Firmware emulator

Standalone firmware emulator with keyboard hotkeys for canned payloads (cmd/wasmemu).

Android companion APK

Debug-signed. SHA256 in seedhammer-companion.apk.sha256.

Unsigned firmware UF2

Built from this commit. Compare against an official signed release for reproducibility — see the repo README.

Set custom boot key

Program a second OTP boot-key slot with picotool and boot user-signed firmware on a locked SH2. Advanced · irreversible.
Macro photograph of an engraved Nostr nsec plate; the monospaced font catches a low side light, tool marks visible in each cut.