teach

name	teach
description	Teach user something, add or update topics in the personal handbook.
disable-model-invocation	true
argument-hint	What would you like to learn about?

The user wants handbook/cookbook knowledge captured as durable HTML. The handbook is the memory and a self-writing book.

Handbook root in Obsidian Vault: ~/murder/zz-handbook/

Read and follow the pretty-html skill for every HTML page. When you need current official documentation, use the web_search and web_fetch tools.

Tone

Write in Artem Sapegin’s voice: candid, practical, conversational, and grounded in concrete experience. Preserve the intended meaning and never invent personal experiences, opinions, or biographical details.

Read and follow the English writing style guide.

Optimize for a reader who forgets easy details: use <ss-callout variant="remember">, gotcha, prefer, and avoid liberally when something is counter-intuitive or easy to misremember. Prefer repeating a key fact in a callout rather than burying it in prose.

Handbook layout

~/murder/zz-handbook/
  _index.yaml          # routing map — maintain on every write
  glossary.html        # global conceptual glossary
  _assets/             # synced from dotfiles — do not author here
  <topic>/             # lowercase slug: css, typescript, git
    index.html         # topic hub — create with new topics
    <doc>.html         # handbook pages: layout.html, grid.html

Never symlink into ~/murder. Never edit _assets/ in the vault — change $DOTFILES_DIR/pretty-html/_assets/ and run dotfiles sync.

Workflow

1. Parse the question — infer topic slug (e.g. css) and subject (e.g. centering).
2. Read _index.yaml — list topic folders and skim matching documents (titles, keywords, headings).
3. Route — decide before creating anything:
   • Extend a section in an existing doc when the subject belongs to the same subtopic (centering → css/layout.html, not centering.html).
   • New doc only when someone would send a direct link to just that topic (container-queries.html, not grid-template-areas.html).
   • New topic folder when the domain is new — add <topic>/index.html hub linking its docs.
4. Gather sources — prefer MDN, specifications, and official vendor docs. Cite them in <ss-resources> and inline where claims need backing. Do not trust parametric knowledge alone for factual claims.
5. Write or update HTML — follow pretty-html skill. Use <ss-code>, <ss-demo>, <ss-diagram>, <ss-callout>, and <ss-resources> as appropriate.
6. Update _index.yaml — add or refresh keywords, titles, and file paths.
7. Update glossary.html when the question introduces a cross-cutting concept (e.g. pure function, polymorphism, closure). Do not add syntax, API names, or properties (margin: auto, place-items).
8. Open the page:

open ~/murder/zz-handbook/<topic>/<doc>.html

Tell the user what was created or updated and invite follow-up questions on the same topic.

_index.yaml format

css:
  layout:
    file: css/layout.html
    title: Layout
    keywords:
      [centering, flexbox, alignment, place-items, margin-auto]
  grid:
    file: css/grid.html
    title: Grid
    keywords: [grid, fr, gap, template-areas]

• Topic keys: lowercase slugs matching folder names.
• Document keys: lowercase slug matching filename without .html.
• keywords: search terms for routing future /teach requests — include synonyms.

Document structure

Each handbook page is scannable reference written in raccoon voice, not a sequential lesson:

1. Breadcrumbs before the heading: Handbook / Topic, linking to the root index and topic hub.
2. Short intro — what this doc covers.
3. Sections (<h2>) per technique or subtopic.
4. Within a section: explanation → <ss-code> or <ss-demo> → callout if easy to forget → optional diagram.
5. End with <ss-resources> for further reading.

When updating an existing doc, merge into the right section; do not duplicate content elsewhere in the file.

Glossary

glossary.html uses the same pretty-html shell. Each term: <h2 id="term-slug">, definition in raccoon voice, links to handbook docs that use the term, optional external link.

Link from docs with a normal anchor: <a href="../glossary.html#pure-function">pure function</a> (adjust relative path by depth).

Topic hub

When creating a new topic, add <topic>/index.html — breadcrumbs (Handbook / Topic, with the topic marked as the current page), title, one-line description, and an unordered list linking to each doc. The root index.html links all topic hubs and the glossary.

Guardrails

• No mission document, learning records, lessons, spaced repetition, or quizzes.
• No Markdown stubs for Obsidian — HTML is canonical.
• Do not create _assets/ copies or duplicate components.js / CSS into topic folders.
• If the question is ambiguous between two existing docs, read both and pick the better home; mention the choice briefly to the user.