Introducing Phased Rollout.

Until now, a Nunchuk inheritance plan sent everything to a single heir the moment it triggered. That still works if it’s what you want. But real families are rarely that simple. Maybe you’re splitting your estate between a spouse and kids. Maybe one heir is ready for a lump sum and another isn’t. Maybe you want to stagger distributions for tax or planning reasons.

Now you can divide the estate however you like. Say your spouse gets 50% and your kids split the rest. Each beneficiary has their own share, and their own release schedule.

And you can phase each share over time. One heir receives a lump sum in year 5. Another gets 2% a year for a decade, then 4% a year after that. You build it stage by stage, setting a percentage and a date for each, until the stages add up to 100%. The plan handles the rest.

What if an heir never claims? You decide in advance. Unclaimed shares can stay put, or redistribute to the other beneficiaries after a period of inactivity or on a date you set. No share ever gets stranded.

Everything else works exactly as before. The multisig, your Backup Password, the inheritance key are all unchanged. You don’t migrate anything or move any funds. You hold your own keys throughout. Phased Rollout changes how your bitcoin is distributed, not who controls it.

It runs on our off-chain protocol, the flexible one, which you can update as often as life requires: change beneficiaries, adjust the timing, or reshape the whole plan, all without a new wallet or on-chain fees. If you’d rather have Bitcoin itself enforce your plan, with no dependence on us, that’s what our on-chain protocol is for. Different tradeoffs, both fully supported, and you’re never locked into either. Start with one and switch to the other whenever your needs change.

Live today for Honey Badger and Byzantine subscribers. Update to app version 2.6 or later, and try it free on testnet or an unused wallet first.

Full details on our blog: https://nunchuk.io/blog/phased-rollout

🖥️ ☕️

The Bitcoin agent key can now live in a Coldcard Mk4/Mk5 in HSM mode.

Even if the host machine running your agent is fully compromised, the signing key stays isolated in hardware. The attacker gets nothing useful.

Bitcoin agents with bounded authority. Now with HSM-grade key security.

AI agents shouldn't get the full key to your kingdom.

Today we're releasing Nunchuk CLI: create a shared Bitcoin wallet with your agent, give it a spending budget, and keep the final say.

Build Bitcoin agents with bounded authority.