Buys a fixed dollar amount of one token or tokenized stock on a schedule, and nothing else.

Each fire buys SIZE_USD of it at whatever the price is, then leaves a quiet note in the duty's thread. Dollar-cost averaging: the same size every time, so the size is the decision and the timing is not.

What it buys

It resolves nothing itself. Every buy is one exact shape, read from the settings:

The owner named	TOKEN	ADDRESS	CHAIN_ID	Bought
a crypto token by ticker	the ticker	its contract	its chain	that contract, on that chain
a crypto token by address	the address	—	its chain (none for a mint)	that contract, on that chain
a chain's own coin	ETH, BNB or SOL	—	a chain whose coin it is	that coin
a tokenized stock	the ticker	—	—	the stock, on whichever venue returns the most shares

A mint lives only on Solana, so it needs no CHAIN_ID; nor do BNB (BSC) and SOL. ETH is the own coin of Ethereum, Base, Arbitrum and Robinhood, so it needs one.

When the owner named no chain and gave no address, the settings hold the match they picked on a card, each shown with its name, chain and address. One search result is not taken as the answer: token-search leaves unverified tokens out. Anything looser buys nothing — a ticker with a CHAIN_ID but no ADDRESS, a mint on an EVM chain, ETH on BSC. The owner gets one note when the program starts, and each fire logs the reason. A ticker alone on a chain would let the rail buy whichever deployment it ranks first, which can be a wrapper or a lookalike, and can change between fires.

The title and every note name it by TOKEN: the ticker, or the address when the owner gave one.

What it will not do

• Look at the price. There is no dip check, no condition, no "only if". An owner who wants one is asking for a different duty — a timer whose code fetches the figure itself and decides.
• Buy twice for one slot. Every buy is keyed on the schedule slot, not the instant it fired, so a catch-up after a restart and the fire it is catching up on are one buy. The ledger answers the second one replay.
• Sell, ever. It only buys.
• Pick a stock's venue. A stock buy goes to whichever venue returns the most shares; the rail takes no venue on a buy.
• Spend before the owner funds it. It spends through the pocket, which starts empty; until it is funded every buy becomes an approval card. Once funded, the pocket is the only limit on what it spends: the duty keeps no daily count of its own, and the server refuses a buy the pocket can't cover.

Settings

Name	Unit	Default	Means
TOKEN	ticker or address	required	the token as the owner named it
ADDRESS	contract address	unset	a crypto ticker's exact contract, on CHAIN_ID
CHAIN_ID	numeric chain id	unset	Base 8453, Ethereum 1, BSC 56, Arbitrum 42161, Robinhood 4663, Solana 1151111081099710
SIZE_USD	US dollars per buy	required	minimum 2 — the swap route's own floor, below which the leg comes back as a wire error; a tokenized stock's floor is per ticker (/stock-limits: $5 on most tickers, $22 on the illiquid tail), and a fire under it is skipped with the reason logged
SIZING	—	fixed	fixed-size by definition; it takes no other value

Trigger

One timer — either a time of day in the owner's zone, or an interval:

{ "kind": "timer", "dailyAt": "09:00", "timezone": "Asia/Singapore" }

A dailyAt whose slot has already passed today fires today.