PF1e (CRB Movement): "You can't run or charge across difficult
terrain". _execute_run checked the explicit destination against the full
cost field (which routes through difficult terrain at 2x) but descended
with avoid_difficult=True, so a destination beyond rubble was accepted
(ok=True) yet silently truncated at the obstacle. _destination_reachable
now takes the same avoid_difficult constraint (difficult cells removed
from the field; a destination whose footprint touches difficult terrain is
not a legal run endpoint either), so verdict and path agree. The test that
pinned the old silent-stop-short convention now expects
unreachable_destination; README updated.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
PF1e CRB 'Movement, Position and Distance - Difficult Terrain': 'You
can't run or charge across difficult terrain.' The run action reused the
move machinery (_descend_path), so it crossed rubble at 2x cost within
the 4x budget. The descent now takes an avoid_difficult option that
refuses every step whose footprint would touch a cell with move cost > 1
(the same rejection charge applies in _charge_path_clear); the run
moves up to the obstacle and stops there (deterministic, documented).
Move and charge behavior are unchanged.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
PF1e CRB: running is a full-round action, not a move action. The budget
filter now classifies run as full-round (consumes the standard AND the
move slot), _FULL_ROUND_KINDS includes it for the staggered filter, and
the nauseated filter drops it (run is no longer move-like). The
moved_this_turn/running flags are unchanged; the _execute_run
moved_this_turn early return stays as defense in depth. default_policy
never emits run, so the golden transcripts are untouched.
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
ctan