[markbac]

Summary

A section's role and layout are now set by attributes in braces, not by its heading name:

Braces	Section
None	A section in a band of columns
{.wide}	A full-width section, a band of its own
{.stats}	The strip of figures (was ## Stats)
{.abstract}	The introduction box (was ## Abstract)
{.summary}	The banner and closing blocks (was ## Summary)
{.references}	The references list, under its own heading text (was ## References)
{cols=3}	Gives its band of columns three columns
{.flow}, {colour=}	As before. colour= now also colours an abstract's box and a summary's banner

• No heading name is special any more. ## Stats, ## Abstract, ## Summary and ## References are ordinary sections. Backwards compatibility was not wanted.
• Every part is placed where it is in the file. A stats strip, abstract, summary or references list is full width wherever it is written, so a second strip can sit halfway down. Before, they were pulled to fixed places at the top and bottom.
• {cols=N} lifts the one-column-count limit. One band can have two columns and the next three. A band that asks for two different counts is an error.
• Other checks:
  • A heading with two roles, or a cols= that isn't a whole number, is an error.
  • Layout attributes on a role section, or on a wide one, are ignored with a warning.
  • split now needs exactly one band of columns.
• Examples: all four posters use the new form. The sensor node poster gains a band of three product variants under its two-column band, to show cols=.
• Docs: the posters chapter's page structure section is rewritten around the attributes, the writing guide is updated, and FR-160 is added.

Tests

• 1339 passed, 20 skipped. New tests cover file-order placement, cols= per band, the old names now being ordinary sections, and the attribute mistakes.
• The browser tests pass.
• ruff check . passes, and so do both --strict lint runs.
• All four example posters build as one-page PDFs.

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Generated by Claude Code