# ASCII Icon System (plain text, no box-drawing chars)
# Minimal line icons for categories/nodes/arrows/states

# Shapes
[x]     = regular node
((x))   = important / core
{x}     = decision
<x>     = data / artifact
o       = actor / external

# Arrows
-->     = primary flow
--->    = secondary
==>     = emphasized
-->|    = terminal

# States
[ ]     = empty / pending
[x]     = filled / done
[!]     = alert / warning
[?]     = unknown / question

# Usage in diagrams:
# [Auth] --> [Core API] --> [Database]
# ((System Core)) --> [Module A]
# {Decision} --> [Yes Path] / [No Path]
