doc

name	doc
disable-model-invocation	true
argument-hint	<description>
description	Audit and fix documentation gaps: block library entries, example models, getting-started guides, presentations, README updates. Also handles newsletter entries (/doc newsletter). Use when the user asks to "write a newsletter entry", "add to the newsletter", or "update the newsletter".
metadata	{"version":"2026.06.03+7cdafd"}

/doc <description> — Documentation Audit & Fix

Finds documentation gaps and fills them. Can audit all blocks, all examples, or document a specific feature. Knows the project's documentation structure and checklists for each type of documentation.

Ultrathink throughout.

Arguments

/doc                      — audit recent changes for missing docs
/doc blocks               — audit ALL blocks for doc completeness
/doc examples             — audit ALL examples for doc completeness
/doc newsletter           — write a NEWSLETTER.md entry for recent work
/doc <description>        — document a specific thing

• No arguments: scan git log for recent blocks, features, and examples that lack documentation. Fix the gaps.
• blocks: comprehensive audit of all 121+ registered blocks against the block documentation checklist.
• examples: comprehensive audit of all 48+ example models against the example documentation checklist.
• newsletter: write a NEWSLETTER.md entry for recent work.
• Free-form description: document the specific thing described (e.g., "the new physics blocks", "update the presentation", "update README with Phase 4 progress").

Examples:

• /doc — what's missing since last commit?
• /doc blocks — which blocks lack explorer entries, examples, or docs?
• /doc examples — which examples lack READMEs or screenshots?
• /doc newsletter — write a newsletter entry for recent features
• /doc the new thermal blocks
• /doc update the presentation with recent results
• /doc update README with current block count and test numbers

Documentation Structure (where things live)

Block documentation

What	Where	Format
Block registration	Registry file	BlockRegistry.registerBlock({...})
Explorer metadata	Component explorer file	BLOCK_EXPLORER_DATA[type] = {blurb, related, examples}
Example model registry	Component explorer file	EXAMPLE_MODELS[key] = {path, name, difficulty, description}
Block reference	getting-started/BLOCK_LIBRARY.md	Markdown — all blocks with params and usage
Block specs	plans/blocks/<category>/	Markdown — 14 category directories
Docs app catalog	UI docs registry	Central registry for the docs app

Example documentation

What	Where	Format
Example model	examples/<name>/<name>.model	Model file
Example README	examples/<name>/README.md	Markdown walkthrough
Screenshots	examples/<name>/screenshots/	Numbered PNGs: 01-model-overview.png, 02-simulation-results.png
Gallery index	examples/README.md	Markdown — all examples with images and descriptions
App dropdown	UI examples dropdown	Categorized dropdown by module

High-level documentation

What	Where	Format
Project README	README.md	Block count, test count, feature summary, status
Getting-started guides	getting-started/	22 markdown files — tutorials and references
Newsletter	getting-started/NEWSLETTER.md	Chronological feature announcements
Presentations	presentations/	Markdown + HTML (4 presentations)
Docs app	docs/	JS app reading from docs-registry.js
Viewer	viewer/	Standalone markdown viewer
Plans	plans/	37 plan and issue tracking files

Block Documentation Checklist

When auditing or documenting blocks, check each against this list:

• Registered in registry file — type, name, category, description, keywords, ports, params, defaults, defaultSize
• Explorer entry in component explorer — blurb (when/why to use), related blocks, example model links
• Example model demonstrating the block — model file in examples/<name>/, registered in EXAMPLE_MODELS
• Example README — walkthrough explaining what the model does, key blocks used, expected behavior, screenshots
• Example screenshots — numbered PNGs in screenshots/ folder (01-model-overview.png, 02-simulation-results.png)
• Block reference entry in getting-started/BLOCK_LIBRARY.md — description, parameters table, usage notes
• Gallery entry in examples/README.md — description, image, blocks used, solver info, download link
• Doc issue tracked — entry in doc issues tracker (open or closed)

Example Documentation Checklist

When auditing or documenting examples, check each against this list:

• Model file exists and loads correctly
• README.md exists with:
  • What this demonstrates (1-2 paragraphs)
  • Blocks used (list with brief descriptions)
  • Expected behavior / simulation results
  • Loading instructions
  • Key concepts (if tutorial-style)
• Screenshots in screenshots/ folder:
  • 01-model-overview.png (the block diagram)
  • 02-simulation-results.png (scope output)
  • Additional screenshots for complex models
• Gallery entry in examples/README.md
• Explorer links — block entries in component explorer link to this example where relevant
• Category assignment in examples-dropdown.js — categorized by module

README styles (match existing conventions)

• Tutorial style (motor-controller): step-by-step with substeps, screenshots at each step, parameter tables, key concepts summary
• Model-focused style (feedback-loop): model overview, block list, expected behavior, files table
• Chart design style (state-machine-demo): states table, transitions table, data section, simulation trace
• Visual style (signal-filter): minimal text, physics equations, screenshot-driven

Match the style to the example's complexity and purpose.

Workflow

Phase 1 — Audit

Based on the argument:

No argument (recent changes):

1. Check recent commits: git log --oneline -20
2. Identify new blocks (search for registerBlock in recent diffs)
3. Identify new examples (new directories in examples/)
4. Identify new features (new getting-started guides, plan completions)
5. Cross-reference against checklists above

blocks:

Don't try to eyeball 121+ blocks across 2,700 lines — extract lists mechanically first, then diff:

1. Extract block type lists from each source:

   grep "type:" src/library/registry.js | sed "s/.*type: '//;s/'.*//"
   

   grep -oP '^\s+\w+:' src/library/explorer-data.js | sed 's/[: ]//g'
   

   grep '###' getting-started/BLOCK_LIBRARY.md
   

2. Diff the lists — which blocks are in the registry but missing from the component explorer or BLOCK_LIBRARY?
3. Only read full entries for blocks in the gap set — don't read all 121 entries, just the ones that need attention
4. Present a gap table:

   Block	Explorer	BLOCK_LIBRARY	Example	Screenshots

examples:

Extract the list mechanically, then check each:

1. List all example directories and their contents:

   for d in examples/*/; do
     echo "$(basename $d): $(ls $d | tr '\n' ' ')"
   done
   

2. Check gallery coverage:

   grep '##' examples/README.md | sed 's/## //'
   

3. Diff — which directories lack README.md, screenshots/, or gallery entries?
4. Only inspect gaps in detail — don't read all 48 READMEs
5. Present a gap table:

   Example	Model	README	Screenshots	Gallery

newsletter:

Write a new entry for getting-started/NEWSLETTER.md. Newest entries go at the top, right after the intro paragraph and --- separator.

1. Check recent work — read git log --oneline -20 and identify what was built since the last newsletter entry
2. Write the entry following this structure:

   ---
   
   ## Mon DD — Short Descriptive Title
   

   • Opening sentence: lead with what the user gets, not what was implemented. Bold the key capability. Good: "You can now share a model by sending a link." Bad: "Added a ShareManager module."
   • Body: pick the format that fits:
     • User-facing feature: opening paragraph → how to start (numbered steps) → how it works (bullets) → optional architecture note
     • Block additions: "Expanded from X to Y blocks" → bullet list of new blocks → new examples → updated counts
     • QE/bugfix batch: scope summary → notable fixes → deferred count
     • Multi-feature drop: bold sub-headers → bullet lists under each
   • Screenshot: one image per entry showing the feature in its finished state. Save to getting-started/screenshots/newsletter/ with kebab-case filename.
3. Formatting conventions:
   • Bold for feature names, UI elements, shortcuts, block names
   • Backtick for values, expressions, file names, parameters, code
   • Parenthetical categories: (Sources), (Logic), (Discrete)
   • Issue references: (#34, #105) when relevant
   • No emojis, no marketing language, no exclamation marks
   • Concrete numbers: old→new block counts, test counts, line counts
4. Update Project Stats section at the bottom of the newsletter if counts changed (source lines, test count, block count)
5. Architecture notes (include sparingly, at the end):
   • Standalone: **Module:** \src/codegen/` — 11 files, ~4,900 lines.`
   • Inline: **Architecture:** Single new module \MobileController.js` (619 lines).` Pick the interesting bits — don't list every file changed.
6. What to avoid:
   • Don't describe the implementation journey ("first we tried X, then Y")
   • Don't pad with filler ("This is a great improvement that users will love")
   • Don't list every file changed
   • Don't use exclamation marks or marketing tone
7. Tone: technical and factual, written for developers. Read like well-written release notes, not a blog post.

Free-form description:

1. Understand what needs documenting
2. Identify which checklists apply
3. Check current state of relevant docs

Phase 2 — Create Missing Documentation

For each gap found:

1. Missing explorer entry — read the block's implementation and registration, write a blurb, identify related blocks and examples. Add to the component explorer file.

2. Missing example model — create a model file following /model-design guidelines. Place in examples/<name>/. Register in EXAMPLE_MODELS.

3. Missing example README — write using the appropriate style (see README styles above). Include blocks used, expected behavior, screenshots.

4. Missing screenshots — use playwright-cli to:

   • Load the example model
   • Take screenshot of the block diagram (01-model-overview.png)
   • Run the simulation
   • Take screenshot of scope output (02-simulation-results.png)

5. Missing BLOCK_LIBRARY entry — add to the appropriate category section with description, parameter table, usage notes.

6. Missing gallery entry — add to examples/README.md with description, image reference, blocks used.

7. README/presentation updates — update block counts, test counts, feature lists, status sections as needed.

Phase 3 — Verify

• Check all markdown formatting (links, images, tables)
• Verify image references point to existing files
• Verify model files load without errors (if dev server is up)
• $FULL_TEST_CMD (canonical form — maintainers: see references/canonical-config-prelude.md §1 in the zskills source) if any code files were touched (component explorer, registry file, docs-registry.js, examples-dropdown.js)

Phase 4 — Report

Summarize what was documented:

Documentation audit complete.

Created:
  - Explorer entries: 3 (Mass, Spring, Damper)
  - Example models: 1 (free-vibration/)
  - Example READMEs: 1
  - Screenshots: 4
  - BLOCK_LIBRARY entries: 3
  - Gallery entries: 1

Remaining gaps:
  - [list any unfixed gaps with reasons]

Key Rules

• Follow existing conventions — match the style, format, and structure of existing documentation. Don't invent new formats.
• Use /model-design guidelines for model files — LTR signal flow, 10px grid snap, orthogonal routing, no overlapping.
• Screenshots via playwright-cli — real browser screenshots, not generated images. Use /manual-testing setup for auth bypass.
• Update all cross-references — a new example needs entries in component explorer, examples/README.md, and relevant block explorer entries. Don't create orphaned docs.
• $FULL_TEST_CMD before committing (canonical form — maintainers: see references/canonical-config-prelude.md §1 in the zskills source) if code files were touched.
• Content-only changes skip tests — if only markdown/images were changed, no test run needed.