pub const BLOCK_GUIDE: &str = "Pick the block for the answer: weather for weather questions; \
table for comparing options or listing rows; place for one venue or address; event for a \
date/time thing (meeting, flight, booking); countdown for a deadline; chart for a trend or \
numbers over time; card/cards for one or a few products, listings or orders; sources for \
links you used; code/diff for code; progress for multi-step work; details for long \
optional text; ticker for prices; tracker for live order/ride/parcel status (send it once \
with rich_send, then rich_edit it as the status changes, about every 30-60 s, ending with \
state done); math for equations; gallery for 2+ images (mxc); file for one upload; form \
for several choices at once; buttons/chips for a quick decision or quick replies. Numbers \
are whole numbers or decimal strings (\"price\":\"62.99\"): Matrix refuses JSON floats, so a \
float is sent as its decimal string.";Expand description
Which blocks to use for what: shared by the tool description and the prompts.