GenerateBlocks V2 Layout Builder

Build professional WordPress layouts with GenerateBlocks V2: four core blocks, the Query/Looper family for dynamic content, dynamic tags for data binding, and GB Pro for CSS Mode, global styles, interactive components, forms, and conditions.

Read first — routing

This file holds only the non-negotiables. The depth lives in references/:

1. references/_index.md — task router. Tells you which files to load.
2. references/recovery-rules.md — every known cause of "Attempt

Recovery" errors with the exact fix. Read on every task. Skip it and you will produce broken markup.

1. The task-specific reference(s) from the router — query loops, dynamic

tags, ACF, animations, conditions, forms, template authoring, Pro blocks.

For styling work, also read:

• references/css-mode.md when CSS Mode, raw CSS, nested selectors,

Global Styles, or the styles/css relationship matters.

• references/responsive.md for any breakpoint, media query, container

query, or responsive composition.

• references/design-quality.md whenever the skill invents or materially

changes a visual direction.

When the task is to put the markup on a real site rather than hand it over, read references/mcp-publishing.md — MCP servers and REST writes have their own silent failure modes and a 200 response proves nothing.

If the task involves dynamic data at all, references/dynamic-tags.md is mandatory — the tag syntax is precise and wrong forms fail silently.

The meta-rule (read this twice)

The WordPress block editor validates blocks by **re-serializing and
string-comparing against the markup you pasted**. Any deviation — even
semantically-equivalent JSON or HTML — is treated as corruption and
triggers "Attempt Recovery".

Emit what the editor emits, not what you think is correct. That means the canonical JSON key order, the five string substitutions (--→\u002d\u002d, <→\u003c, >→\u003e, &→\u0026, \"→\u0022), and the exact class lists. Compile new css deterministically from styles so later editor saves remain stable, but do not misdiagnose harmless formatting in an existing CSS cache as a recovery cause. Details: recovery-rules.md and css-mode.md.

The blocks

GB Pro adds 27 more (accordion, tabs, carousel, navigation, site-header, forms) — gb-pro.md has the map.

Use core blocks for specialized content: core/image (captions), core/list, core/table, core/video, core/embed, core/paragraph (emoji). Full table: block-types.md §5.

The ten commandments

Before serialization, apply these 2 default presentation rules:

• Do not invent decorative eyebrows. Start with the heading unless the

nearest project design system explicitly requires a useful category, status, or navigation label. Repeated tiny uppercase pretitles are not hierarchy.

• Never use zero-padded numbers. Use 1, 2, and 3, never 01, 02, or

03, in visible copy, step labels, section numbering, filenames, CSS classes, or newly generated IDs. Preserve exact fixed-format external data only, such as ISO dates, versions, timestamps, URLs, code samples, or third-party IDs.

1. Canonical attribute order per block (block.json declaration order;

className last). Text block puts content 3rd. Pro blocks differ — check pro-interactive.md before emitting Pro JSON.

1. The five JSON substitutions on every string value in block comments.

Inline HTML style="" in the body is NOT JSON — literal characters there.

1. Class lists follow the measured target. For a new element block, prefer

Option A: "className":"gb-element", rendered as class="gb-element-{id} gb-element". Text/media/shape commonly omit className and render base-first. Preserve an existing block's convention; never normalize it during an unrelated edit.

1. htmlAttributes is a plain object, never an array. Absolute URLs in

href.

1. styles is the editable source; css is its compiled cache. Put base

declarations, nested selectors, transitions, and supported at-rules in styles, then mirror the compiled result in css. CSS Mode supports one selector level plus @media, @supports, and @container. A selector in css without an equivalent styles branch is durability debt because an editor save can remove it. Details: css-mode.md.

1. Links: element <a> wrapping a text span child. Text <a> strips

its href; element <a> with raw text triggers recovery. Inline links go inside a text block's rich-text content.

1. Dynamic tags: {{tag option:value|option2:value}} — space after the

tag name, pipes between options, no quotes ever. {{postpermalink}}, {{featuredimage size:large}}, {{postmeta key:field}}, {{termlist tax:category}}. Wrong tags save fine and render as literal text — worse than recovery. dynamic-tags.md is law.

1. No HTML comments other than <!-- wp:... --> delimiters. Compact

nesting — closing comment adjacent to closing tag.

1. Dynamic loop images use generateblocks/media (+ tag in src);

static captioned images use core/image.

1. Responsive: use the installed build's exact at-rule keys. In 2.4.1 the

native defaults are @media (max-width:1024px) for Tablet & Mobile and @media (max-width:767px) for Mobile. Pro allows custom queries. Preserve existing custom 768px rules; do not silently rewrite their boundary. Keep at-rules in styles and mirror them in css.

Output requirements

• Always write generated blocks to a file ({section-name}.html), never

inline in chat — block code breaks chat formatting and truncates.

• Run scripts/preflight.py <file> before delivering. It executes the

recovery-rules.md §7 checklist as assertions and catches what inspection misses: no-op escape tables, misordered keys, duplicate uniqueIds, stray CSS not represented in styles, mixed class-list conventions, thick rounded surfaces, and invalid clamp() + spacing. Pass the actual WordPress post ID with --post-id N; new output fails if any GenerateBlocks ID is outside that post namespace. Add --links N to assert the internal link count survived a conversion.

• If you are also writing to a live site, follow the round trip in

references/mcp-publishing.md: draft first for the real post ID, read content.raw, splice, preflight, write, read back, and verify with scripts/verify_roundtrip.py. Never write to production without a snapshot or a saved copy of the original content.raw.

• Summarize in chat: what was built, block count, anything needing Pro.

Tooling

For anything beyond a few blocks, generate the markup from a script rather than hand-typing it. Hand-authored escapes and key order drift; a generator plus preflight does not. See field-notes.md §1.1 for the escape-table no-op trap that has shipped broken markup more than once.

Before hand-authoring for an EXISTING site

Measure the target's conventions first — plugin behaviour varies by version and the live page is ground truth for the build actually installed. field-notes.md §7 has the inspection script. Check versions via authenticated GET /wp-json/wp/v2/plugins. Treat existing content as evidence, not as a template: a site can contain editor-authored blocks, imported patterns, and hand-authored markup with different conventions. Two points matter most:

• preserve the target's established content/className convention per block

type rather than normalizing it during an unrelated edit;

• the css attribute is not re-derived during initial block validation, but a

later style edit can recompile it from styles.

Resolve the numeric WordPress post ID before generating any block IDs. For a new page, product, post, or template, create the record as a draft first, read back its ID, and only then serialize the blocks. Never substitute the slug, FluentCart product-detail ID, variation ID, a guessed number, or a literal {post_id} token.

Unique ID convention

Every newly generated ID uses {section}-{postid}-{sequence}{optionalsuffix}. Examples for WordPress post 1173976: hero-1173976-1, hero-1173976-2a, card-1173976-14.

• section is a short lowercase component name such as hero, card, or faq.
• post_id is the actual numeric WordPress post ID.
• sequence starts at 1 and is never zero-padded.
• optional_suffix is a lowercase nesting letter only when useful.

Use makeuniqueid('hero', postid, 1) from scripts/gbserialize.py instead of assembling IDs by hand. The {post_id} notation is documentation only and must never survive into serialized markup. Preserve IDs already stored on an existing block unless that block is being replaced; do not rename established IDs solely to conform to this convention.

Design inference (when no design is given)

Read the nearest project design system and inspect the target page before inventing tokens. Theme variables, existing Global Styles, container width, type scale, and current breakpoints outrank this skill.

If no project guidance exists, use a quiet baseline: inherit typography, var(--gb-container-width) for the main rail, a restrained spacing scale, 1px separators, modest radii, and one clear action. Do not infer a site's current design language from an old example or hard-code a brand palette.

For gauravtiwari.org or gatilab.com, load /gt-design; it owns the current GT design language. The GenerateBlocks skill supplies delivery mechanics only.

Design quality — no slop

Any design this skill invents or materially changes must pass references/design-quality.md. If /design-slop is available, load it too; the nearest project design system still owns brand-specific decisions. The non-negotiables either way:

• Never a thick border (2px+) on a rounded card, callout, or container

— including one thick side. Separate with whitespace first, then a 1px hairline, then a subtle background tint. Shadows only for elements that truly float.

• Cards only for independently interactive or genuinely distinct units.

Whitespace before containers, dividers before cards — no card soup.

• One dominant visual idea per section. Gradients, glows, glass, blur, and

decorative motion stay rare and purposeful — never crutches for weak hierarchy.

• Consistent, modest radius scale. Not every element a pill.
• Hierarchy comes from type scale, spacing, and alignment — not decoration.
• Real content and real states: no fabricated metrics or testimonials;

survive long titles and empty fields; compose mobile deliberately instead of just stacking.

• Responsive behavior is part of the design, not a cleanup pass. Verify the

content order, tap targets, overflow, long strings, and at least one awkward tablet width.

Final check: if the business name could be swapped without the section changing, it's generic — make it specific before shipping.

Complex layout strategy

For 50+ block sections: map the structure first, build bottom-up, keep one post-scoped ID family per component, validate each chunk against the checklist before assembling. See troubleshooting.md for failure recipes.

Examples

Structural block templates live in examples/: basic/ (buttons, containers), compound/ (cards), layouts/ (hero, query blog grid), svg/ (icons). Namespace every example with the target post ID before serialization; an example ID never overrides the convention above. Golden full sections live at the repo root examples/ (14 section types + production pages from gauravtiwari.org).