throwing

throw (throwing) covers throw X at Y and throw X to Y, with toss and hurl in both forms. (The action also implements bare and directional throws, throw the rock and throw the rock north, but no core grammar reaches them today; a story must add those patterns itself.) The item is implicitly taken if needed; the target must be in the same room; anything heavier than 10 kg refuses with too_heavy.

What happens next is probabilistic: document-worthy behavior, not a bug, and per project policy the dice are never disabled. The platform infers fragility from the item's name and description (glass, crystal, bottle, vase, china, porcelain, "delicate", "fragile"). Throwing at a person hits about 70% of the time. A nimble target may duck (target_ducks), a catcher may catch (target_catches, and then they hold it), a hit lands hits_target and annoys them (target_angry); a fragile item that hits usually breaks (breaks_against). Throwing at anything else hits about 90% of the time; the item lands on a supporter (lands_on), in an open container (lands_in), bounces off a closed one (bounces_off), and fragile items usually break. A broken item is removed from play entirely, with an item_destroyed event (cause: 'thrown').

The author writes:

create the Taproom
  a room

  A low-beamed taproom, all smoke and sawdust.

create the stone hearth
  aka hearth
  scenery
  in the Taproom

  A soot-blackened stone hearth.

create the gilt mirror
  aka mirror
  scenery
  in the Taproom

  The landlord's prized gilt mirror, hung above the bar.

  on throwing it
    refuse mirror-luck
  end on

  phrase mirror-luck:
    Seven years' bad luck, and the landlord watching? You lower your arm.

create the green bottle
  aka bottle

  An empty green glass bottle.

create the player
  starts in the Taproom
  carries the green bottle

The player sees (one genuine run, where the second command rolls live dice):

> throw the bottle at the mirror
Seven years' bad luck, and the landlord watching? You lower your arm.

> throw the bottle at the hearth
The green bottle smashes against the stone hearth!

The mirror's target-side guard is deterministic; the hearth throw is not: the same command can also miss, or hit without breaking. This run's "bottle" name made the item fragile, and the smash removed it from play.

Interceptors: both the item and the target are consulted (on throwing it on either). A glacier can react to being hit in the same command as an explosive reacts to being thrown; a capability behavior registered for throwing on the target takes over the whole throw.