Changelog

v0.3.1

Stacked layout gap inflation — when max_width triggered vertical stacking, gap expansions computed for the wide layout were incorrectly reused, adding excessive vertical space between every node pair
Mindmap multi-line labels — labels containing \n were inserted raw into connector strings, breaking line alignment. Now joined with · for inline display
Gap expansion limited to source/target layers only — intermediate gaps that just carry straight vertical lines no longer get inflated

Progressive compaction — when max_width is set and the graph is too wide, Boxart tries progressively compact settings (smaller gap, then padding) before falling back to canvas clamping. Ported from termaid's auto-fit behavior.
Layout stacking — when compaction isn't enough, sibling nodes in the same layer are stacked vertically (single column) instead of side-by-side, keeping all nodes fully rendered with intact borders.
Syntax highlighting in themed output — code nodes with :language now render with Makeup syntax colors (keywords, functions, strings, operators) alongside the theme's structural colors.

max_width now operates at the canvas cell level instead of string truncation — no more broken box-drawing characters or split ANSI escapes
Labels are pre-wrapped by the layout engine and stored in Layout.wrapped_labels — the shapes renderer no longer re-wraps at a hardcoded width
max_label_width option correctly flows through the entire pipeline
Mindmap renderer handles tuple vertices without crashing (inspect instead of to_string)
Boxart.Graph.with_direction/2 helper for direction changes

Shapes module no longer re-wraps labels at hardcoded 20-char width, respecting the max_label_width option
stamp_node_style preserves Makeup ANSI styles instead of overwriting them with the node theme color
render_ansi_chunk passes through raw ANSI escapes from syntax highlighting
Dialyzer spec fixed: render_graph_canvas uses BGraph.t() not Graph.t()

max_width option — clamp output to terminal width by truncating lines
max_label_width option — configurable word wrapping threshold (default: 20)

Initial release.

Directed graph rendering from Graph.t() (libgraph)
17 node shapes (rectangle, diamond, rounded, hexagon, stadium, circle, cylinder, etc.)
Code nodes with line numbers and optional Makeup syntax highlighting
Edge styles via keyword labels (:solid, :dotted, :thick, :bidirectional, :arrow_type)
Edge labels
Subgraphs
All 4 directions (TD, LR, BT, RL)
Unicode and ASCII charsets
Rounded and sharp edge corners
ANSI color themes (default, mono, neon, dracula, nord, amber, phosphor)
Boxart.Diagram behaviour for specialized renderers
Specialized renderers: state diagrams, sequence diagrams, git graphs, Gantt charts, mindmaps, pie charts
Mindmap renderer accepts Graph.t()
Sugiyama layout with barycenter crossing minimization
A* edge routing with soft obstacles and endpoint spreading
Direction-aware canvas with bitfield junction merging