'DOG Mode': an Ordinals developer challenges Bitcoin Core's anti-spam policy

The years-long fight over what counts as "spam" on the Bitcoin network has a new chapter: the developer behind the Ordinals movement, known by the pseudonym Leonidas, has proposed building an alternative node client called "$DOG Mode" — a direct answer to the filtering policy Bitcoin Core and Bitcoin Knots have pushed for years.

What the "Spam" Fight Is Actually About

Bitcoin Core and Bitcoin Knots, the two most widely used node clients, have for years introduced and tightened relay policy rules that limit how much data can be written into the blockchain through mechanisms like OP_RETURN. Technically, these restrictions aren't part of Bitcoin's consensus rules — they're just individual clients' policy — but in practice, that policy determines which transactions most miners' nodes are willing to relay and include in blocks. Critics call Ordinals inscriptions and Runes-based tokens "clutter" on a blockchain originally built for payments.

What "DOG Mode" Actually Changes

Technically, "$DOG Mode" raises the maximum size of a single transaction to 3.9 million weight units (WU) — versus 400,000 WU on standard Bitcoin Core — and lowers the dust limit (the minimum amount worth sending at all) to 1 satoshi, down from the current 294-546 satoshis. Both changes directly ease writing large inscriptions and issuing Rune tokens, which currently run up against Core and Knots' policy limits.

Leonidas's bet isn't to get the whole network to switch clients at once, but to attract enough nodes and miners to create economic pressure on Bitcoin Core and force the project to loosen its own policy restrictions.

Not the First Ultimatum

This isn't Leonidas's first ultimatum to Core developers: back in September 2025, amid the contentious v30 upgrade, he publicly threatened to fund a full Bitcoin Core fork if developers attempted to censor Ordinals and Runes transactions:

“Any serious attempt by Bitcoin Core to tighten policy rules or censor Ordinals and Runes transactions will be met with decisive action.”

— Leonidas, open letter, September 2025

Quote source: Cryptonews

In defense of his position, Leonidas points out that the Ordinals and Runes economy has contributed over $500 million in fees that strengthen Bitcoin's security by rewarding miners, and claims he's already spoken with miners representing more than 50% of the network's total hashrate.

What This Means in Practice

It's important to understand: "$DOG Mode" isn't a hard fork or a change to Bitcoin's own consensus rules — it's an alternative relay policy at the node level, meaning all transactions remain fully compatible with the network as a whole. The real question isn't technical compatibility, but what share of nodes and miners ultimately adopt the more permissive rule set: that's what will determine whether the initiative stays a niche experiment or actually shifts the balance of power in the long-running fight over the future of Bitcoin block contents.

This material is for informational purposes only and is not investment advice.