vatt-ghern

Public personal tech blog. Daily news authored by a Claude routine. Bespoke HTML deep-stories, persona-driven editing, CJK typography, hosted on Cloudflare Pages.

• Live: https://vatt-ghern.pages.dev
• RSS: https://vatt-ghern.pages.dev/feed.xml
• Codename: vatt'ghern (Elder Speech for "witcher")
• Sibling: kaer-morhen (internal wiki — not a content source)

What's inside

Surface	What it is
src/posts/YYYY/MM/DD/	Bespoke HTML for one daily roundup + up to three deep-stories
src/_includes/layouts/	Nunjucks layouts (base, post, archetype)
src/_includes/widgets/	Reusable catalog widgets — summon with {% widget "name" %}; gallery at /widgets/
src/_data/sources.yml	45 priority-tiered sources the daily-news skill crawls
skills/daily-news/	Claude skill: persona, archetypes, source dispatcher, anti-dup
commands/	Slash commands: /vatt-ghern:daily-news, :weekly, :monthly
mcp/	Cloudflare Worker exposing the archive over MCP
scripts/	Build helpers (OG image, today.svg card, sigil)

Setup

nvm use            # node 20 per .nvmrc
npm install
npm run dev        # http://localhost:8080

Build

npm run build      # writes _site/  (runs prebuild: OG + today.svg)
npm run lint:html  # validates _site/**/*.html
npm test           # node --test tests/*.mjs

Useful one-offs:

npm run og                                    # rebuild OG images
npm run card                                  # rebuild today.svg
npm run social                                # rebuild repo social preview
npm run sigil                                 # rebuild sigil webp variants
npm run widgets:catalog                       # refresh routine-facing widget-catalog.md from sidecars
npm run sources:list                          # list daily-news sources
npm run sources:dry-run -- --type=arxiv       # dry-fetch one source type

The repo's GitHub social preview image is src/static/social-preview.png (1280×640). After regenerating, upload via the GitHub web UI at Settings → Social preview.

Deploy

Cloudflare Pages auto-builds:

• main → production at https://vatt-ghern.pages.dev
• PR / non-main branch → preview build, URL posted as PR comment

GitHub Actions runs .github/workflows/quality.yml (build + html-validate) on every PR.

Daily news routine

The Claude routine (or /vatt-ghern:daily-news slash command) executes the daily-news skill which:

1. Loads context from the past 7 days of posts (dedup baseline)
2. Fetches from src/_data/sources.yml via scripts/fetch-all.mjs
3. Clusters cross-source variants and scores candidates
4. Picks today's 10 (domain coverage) + up to 3 deep-story clusters
5. Authors bespoke HTML for each, in parallel sub-agents
6. Runs the QA gate (archetype-check, html-validate, link-check, dedup)
7. Opens a PR for human review

Weekly + monthly rollups follow the same machinery via /vatt-ghern:weekly and /vatt-ghern:monthly.

MCP server

mcp/worker.mjs is a thin Cloudflare Worker that exposes the archive over MCP — list_posts, get_post, latest, search. See mcp/README.md for tool schemas and Claude Desktop config.

License

MIT © 2026 Tony Hu.

The MIT licence applies to all code and templates. Authored prose inside src/posts/** carries the author's voice — please credit if you quote at length.

Related docs

• DESIGN.md — design rationale (typography, OKLCH palette, sigil)
• PRODUCT.md — product vision, anti-references, pipeline notes
• CONTRIBUTING.md — commit conventions, CJK typography rules
• SECURITY.md — how to report vulnerabilities