Copies another trader's moves onto the owner's own size.

The leader is named by the duty's trade trigger, not by a setting. Each trade they make is gated, sized against the owner's own wallet, and placed as its own keyed leg.

The leader did	This duty does	Unless
bought a token	buys the same token, on the leader's chain	CHAIN_IDS excludes it, or the trade is under MIN_LEADER_USD
sold a token	sells what the owner holds of it, capped at their balance	MIRROR_SELLS is off (it is on by default)
opened a perp	opens the same side, at PERP_LEVERAGE or the leader's own	MIRROR_PERPS is off
closed a perp, or was liquidated	closes the owner's position, in USD notional	MIRROR_PERPS is off
bought or sold a tokenized stock	does the same, share-denominated	MIRROR_STOCKS is off

Out of the box it follows the leader in and out — MIRROR_SELLS defaults on.

What it will not do

• Verify the token. It copies what the leader actually traded — by address, or by symbol when that is what they typed — and never re-resolves through a catalogue. A leader buying something worthless is copied faithfully. The pocket is the limit.
• Size from the leader's wallet. cash_share is a share of the owner's cash; leader_share is a share of what the leader put in. fixed ignores both.
• Exceed MAX_USD per trade, when one is set — except on a perp close, which is deliberately unclamped: a close trimmed to a ceiling leaves a residual position, which is worse than not closing.
• Copy the owner's own trades. Their own activity never arms a leg.
• Spend before the owner funds it. It spends through the pocket, which starts empty; until it is funded every leg becomes an approval card. Once funded, the pocket is what bounds its spending beyond MAX_USD: the duty keeps no daily count of its own, and the server refuses a leg the pocket can't cover.

Settings

Name	Unit	Default	Means
SIZING	fixed | cash_share | leader_share	required	how much per copy — a flat figure, a share of the owner's cash, or a share of what the leader traded
SIZE_USD	US dollars per copy	required when SIZING is fixed	used when SIZING is fixed; minimum 2
SHARE	fraction 0–1	required when SIZING is cash_share or leader_share	used by cash_share / leader_share. 0.2 is 20%
MAX_USD	US dollars	unset	per-trade ceiling. Set only when the owner named one
CHAIN_IDS	chain ids	[]	empty means the leader's own chain. Set only when they named chains
MIN_LEADER_USD	US dollars	0	ignore the leader's trades smaller than this
MIRROR_SELLS	on/off	on	also follow spot sells
MIRROR_PERPS	on/off	on	also follow perp opens and closes
MIRROR_STOCKS	on/off	on	also follow tokenized-stock buys and sells
PERP_LEVERAGE	multiple	0	leverage for a copied open; 0 uses the leader's own
PERP_MAX_LEVERAGE	multiple	0	cap on a copied open's leverage; 0 is no cap (the venue's own still applies)

SIZING is the only required one, and it decides which of SIZE_USD / SHARE is read — a bare number from the owner is dollars or a percentage depending on it.

Trigger

One trade, naming the leader by wallet or principal id:

{ "kind": "trade", "wallets": ["0x…"] }

Do not add direction: the switches above decide which moves are copied, and a trigger filter would also hide the rest from the duty's log.