bitcoin-infrastructure-caravan
Caravan: open-source web-based multisig coordinator (no install). Read-only by default; HW wallet support via HWI bridge. USE WHEN: setting up multisig without installing software, educational multisig flows.
What this skill does
# Caravan Web-based multisig coordinator by Unchained Capital. Browser-only, no install. Open-source. URL: `caravanmultisig.com` (or self-hosted). ## Features - **Multi-vendor multisig**: Trezor, Ledger, Coldcard, etc. - **PSBT** workflow. - **Read-only by default** — keys never leave devices. - **Wallet creation** via descriptor + xpubs. - **Test mode** for learning before mainnet. ## Setup flow 1. Create wallet config: pick threshold (2-of-3 etc.) + key sources. 2. For each key: - Connect HW wallet via HWI bridge (HTTP). - Enter xpub at standard derivation. 3. Save wallet config (JSON) — needed for recovery. 4. Generate addresses; verify on each HW wallet. 5. Sign PSBTs by passing through each device. ## Compared | Aspect | Caravan | Sparrow | Specter | |--------|---------|---------|---------| | Install | None (web) | Yes | Yes | | Bitcoin Core | optional | recommended | recommended | | Multi-sig only | yes | no | no | | Lightning | no | partial | yes | | Maturity | mature | mature | mature | ## Use cases - **Multisig newcomers** wanting browser-based flow. - **Educational**: walk through multisig setup. - **Air-gapped quick coordination** between users. ## Common issues - HWI bridge runs locally; if not running, no HW connection. - Pure web means cleared cache loses wallet config — **always save the JSON config file**. - Public-host caveat: even though browser-only, network requests may leak metadata; for high-value, self-host. ## See also - [specter-desktop/SKILL.md](../specter-desktop/SKILL.md) - [sparrow/SKILL.md](../sparrow/SKILL.md) - [../hardware/hwi/SKILL.md](../../hardware/hwi/SKILL.md) - [../hardware/multi-vendor-multisig/SKILL.md](../../hardware/multi-vendor-multisig/SKILL.md)
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