## Why
Flowcharts with `<br>` tags in node labels previously fell back to source instead of rendering as terminal diagrams.
## What changed
Render `<br>`, `<br/>`, and `<br />` as line breaks in quoted and unquoted flowchart node labels. Apply the 40-display-cell label limit per line and keep the decision marker on the first line. Continue rejecting other HTML, break tags in edge labels, and labels containing only breaks or whitespace.
## Testing
Extend rendering snapshots across all four flowchart directions and cover per-line width limits and unsupported markup. Update TUI streaming tests to cover multiline rendering, resizing, source fallback, and preservation of the original source for copying.
GitOrigin-RevId: 61f2a84c8bb161ac4a1c26ddaa0569f52bfea749
## What changed
- Reformat Markdown tables and lists, login pages, inline visualization HTML, and sample JavaScript scripts.
- Escape union-type pipes in Python SDK API tables so they render within their cells.
- Keep the formatting-recipe test focused on the working directory and formatter commands by removing assertions on comment text.
GitOrigin-RevId: ae46d5b40fd013553de8b5ccf2c41d76be65aba8
## What changed
- Default `flowchart` and `graph` to top-down layout when no direction is specified.
- Support solid and dashed edges with directed, undirected, or bidirectional endpoints: `-->`, `---`, `<-->`, `-.->`, `-.-`, and `<-.->`.
- Accept pipe labels on these edges and spaced directed infix labels such as `A -- send --> B` and `A -. retry .-> B`.
- Expand `&` groups into all source-to-target edges, including in chains. For example, `A & B --> C & D` creates four edges. Enforce the 24-edge limit after expansion and cap each group at 24 node references.
## Testing
Add coverage for equivalent syntax, edge styles and endpoints, malformed input, and expansion limits. Extend rendering snapshots across all four directions and the TUI native-renderer test with the new syntax.
GitOrigin-RevId: 6e51653ebf6b8b7e7e1edec0c2e09a5d9c8dec74
## Why
Splitting every statement at semicolons and rejecting label punctuation prevents rendering labels such as `A["Go []; &"]`, sequence messages containing `data[0] = {x: 1}`, and class members containing semicolons.
## What changed
- Split statements using diagram-specific rules, preserving semicolons inside flowchart labels, quoted tokens, and class member lines. Sequence quotes remain literal text.
- Respect quoted flowchart label delimiters and allow printable label punctuation, including literal ampersands and comparison operators.
- Reject unsupported entity escapes before statement splitting can truncate them, while retaining rejection of HTML markup and malformed labels.
- Document the supported syntax and require newlines between class members.
## Testing
Add parser assertions and update rendering snapshots for punctuation, quoted delimiters, and semicolons. Extend rejection coverage for entity escapes across diagram families, malformed quotes, and invalid class bodies.
GitOrigin-RevId: da94007a66c7c58444e6f0d6a1b409c8c7251941
## What changed
- Reject unsupported flowchart shapes and Markdown strings so the terminal renderer preserves the source with an unsupported-feature notice instead of misrendering it. Keep ordinary quoted labels containing shape-like punctuation valid.
- Preserve class relationship targets beginning with `o`, such as `A --orange`, instead of consuming the first letter as an aggregation marker.
- Accumulate state aliases and descriptions in source order: use the first as the title and subsequent entries as body rows, preserving state identity and limiting body rows to 16.
## Testing
Add parser regressions for these cases and description limits, update class and state snapshots, and extend TUI snapshots to verify source preservation for unsupported flowchart syntax.
GitOrigin-RevId: c44d954312c77229a3752a0d9ada14e34a43a376
## Why
Flowcharts with labels such as `A["Review & confirm"]` fell back to source display instead of rendering a diagram.
## What changed
Accept double-quoted node and edge labels, strip the surrounding quotes, and allow literal ampersands in flowchart labels. Keep other diagram families' label restrictions and continue rejecting HTML, entity escapes, and malformed quotes.
## Testing
Add parser and renderer regression tests for quoted labels, literal ampersands, statement separators, and unsupported text, plus TUI coverage for rendered labels and entity source fallback.
GitOrigin-RevId: 9e61a04665f0266d369fa3595411c9a72f10cb9d
## Why
Flowcharts containing stadium nodes such as `A([Start])` currently fall back to source text instead of rendering in the TUI.
## What changed
Parse stadium declarations and render them with rounded box corners in every supported flowchart direction. Track node shapes explicitly so repeated declarations must agree on both label and shape. Document the supported `([label])` syntax.
## Testing
Add parser and snapshot coverage for repeated references, conflicting declarations, malformed syntax, Unicode labels, mixed shapes, and width limits across all four directions. Add a TUI snapshot for a stadium flowchart and verify source fallback when the diagram is too wide or malformed.
GitOrigin-RevId: 5ebd8babfd25ab4429b3e6c408cb7be8d7f1bb8e
## What changed
- Render completed `mermaid` fences with `codex-mermaid`, using syntax-theme colors for nodes and edges.
- Keep source visible for unclosed, invalid, unsupported, or oversized diagrams, and preserve the original Mermaid for copying and raw mode.
- Keep streamed diagrams mutable until the next top-level block so closing fences and terminal resizing can update their display. Preserve scrollback progress across width and render-mode changes.
## Testing
Add renderer and streaming tests covering supported diagram families, nested fences, Unicode, theme colors, source fallbacks, resizing, raw-mode transitions, and original-source preservation. Verify that node connection ports retain node styling in all four flowchart directions.
GitOrigin-RevId: 9a759248110e6730d629d653061ff7e2ec5dc2c0
## What changed
Add `codex-mermaid`, a standalone crate that renders supported subsets of flowchart, sequence, state, class, and ER diagrams as Unicode text. Expose `render` for plain text and `render_spans` for semantic node, edge, and text spans that callers can style.
Enforce source, diagram, canvas, and display-width limits. Return errors for unsupported input or exceeded limits without producing partial diagrams, leaving source fallback to callers. Include documentation and a stdin rendering example.
## Testing
Add snapshots for each diagram family, checks for relationship endpoints, Unicode labels, semantic spans, truncated input, and size limits, plus edge reconstruction for all 512 directed three-node graphs in all four layout directions.
GitOrigin-RevId: 5b4e65d9152abce5d833e4e6b12113a5a21f700e
Eric Traut