content: add practitioner skill collections + curated IA refactor

[wilsonwangdev]

Summary

Adds a "Practitioner Skill Collections" group to the curated section with three seed entries, and restructures the curated section's information architecture so the index page becomes the canonical browsing entry instead of a sibling of the entries.

Content

Three seed entries under content/curated/entries/ (EN+ZH, with source: frontmatter so the build emits citation/isBasedOn JSON-LD):

• Andrej Karpathy: LLM Wiki — persistent-artifact architecture for agent memory, an alternative to chunk-retrieval RAG
• Addy Osmani: agent-skills — production-grade skills organized by software lifecycle phase (Define → Plan → Build → Verify → Review → Ship)
• Matt Pocock: skills — small, composable, model-agnostic skills as a counterweight to lifecycle frameworks

Naming uses "Practitioner Skill Collections" rather than "KOL" to avoid subjective ranking and emphasize traceable authorship — selection criteria require named author with traceable background, independent thinking (not vendor-doc restatement), and active maintenance or a clearly dated snapshot.

IA refactor

Before this PR, sections with an index page (only curated) were inconsistent: the curated index existed but appeared on the homepage as one item among siblings, and breadcrumb "Curated" links from detail pages went back to the homepage instead of the index.

Two changes in build/build.mjs fix both:

• Homepage listing detects sections that have an index page (rel === section) and collapses the listing to that single link. Sections without an index (concepts, guides, evangelism) are unchanged.
• Breadcrumb sectionPath checks existsSync(content/<section>/index.<lang>.md) and points to the section index when present, otherwise falls back to the homepage.

The curated index page itself is restructured into two parallel groups (Official Articles · Practitioner Skill Collections), each with its own selection criteria.

Layer (per SPEC 006)

Layer 1 — Universal Content. New entries are commentary curating external work; no project-specific references. Build changes are repo-internal and don't affect Layer 2 distributables.

Verification

• npm run build produces 36 pages without errors
• All 12 new HTML files (6 entries × 2 langs) return 200 locally
• JSON-LD on each entry includes citation + isBasedOn pointing to the source repo/gist
• llms.txt and llms-full.txt regenerate to include the new entries
• Heading IDs on the curated index are unique (verified after renaming the criteria subheadings)
• Breadcrumb "Curated" link on detail pages now correctly returns to /en/curated/ or /zh/curated/
• Homepage curated section collapses to a single "Curated Articles / 精选文章" link

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Project	Deployment	Actions	Updated (UTC)
agent-master-handbook	Ready	Preview, Comment	May 8, 2026 4:31pm