Update AGENTS.md with new information

.cspell.config.yaml

@@ -48,6 +48,7 @@ words:
   - linkinator
   - lychee
   - markdownlint
+  - markdownlintrc
   - maxretry
   - mathjax
   - mermaid

AGENTS.md

@@ -8,49 +8,55 @@ Hugo blog (multilingual EN + PT-BR) using the **anubis2** theme as a git submodu
 
 ```bash
 hugo server                # dev server at localhost:1313
-hugo                  # build to ./public/
-./deploy.sh           # hugo --minify && rsync to server
+hugo                       # build to ./public/ (no minify)
+./deploy.sh                # pre-commit → hugo --minify → rsync
+pre-commit run --all-files # quality check (lint, spell, links)
 ```
 
-No tests, linter, or typecheck.
+## Quality toolchain
+
+- **pre-commit** — runs on `./deploy.sh` or manually via `pre-commit run --all-files`. Includes: YAML/TOML/JSON check, EOF fixer, trailing whitespace, large file check, markdownlint, cspell (EN + PT-BR), lychee (link checker).
+- **markdownlint** — config: `.markdownlintrc`. MD013 (line-length) disabled.
+- **cspell** — config: `.cspell.config.yaml`. Adds `@cspell/dict-pt-br` via `additional_dependencies`. Custom word list for technical terms.
+- **lychee** — config: `.lychee.toml`. Run locally with `--root-dir static` to resolve `/images/...` links. Excludes social media domains and `sshaudit.com`.
+
+All quality tooling must pass before deploy. No separate test framework.
 
 ## Content conventions
 
 - **Posts**: `content/posts/<slug>.md` (EN), `content/posts/<slug>.pt.md` (PT-BR)
 - **Images**: `static/images/<filename>` — referenced as `/images/<filename>` in markdown
-- **PT translations** set `canonical = "/posts/<en-slug>"` in frontmatter to point to the English original
-- **`lastmod`** in frontmatter must use bare TOML datetime (no quotes): `lastmod = 2026-05-09T00:00:00Z`. With `enableGitInfo = true`, the template prefers `.Params.lastmod` over git dates — avoid `'<string>'` quoted format (Hugo stores it as string, not `time.Time`)
-- **Archetype**: `hugo new posts/<slug>.md` uses `archetypes/default.md`
-- **Tags** only (no categories used): `tags = ["GNU/Linux", "Tools"]`
-
-## Theme overrides (site `layouts/` shadows theme)
-
-- `layouts/partials/head.html` — overrides theme head: adds canonical from frontmatter (`Params.canonical`), production-only Umami analytics
-- `layouts/partials/post-info.html` — overrides theme: prefers `.Params.lastmod` over `.Lastmod` (git override), shows "Last modified" when `lastmod ≠ date`
-- `layouts/partials/footer-extra.html` — Ko-fi floating chat widget
-- `layouts/robots.txt` — custom sitemap entries for both languages
+- **PT translations** set `canonical = "/posts/<en-slug>"` in frontmatter
+- **`lastmod`** must use bare TOML datetime (no quotes): `lastmod = 2026-05-09T00:00:00Z`.
+- **Archetype**: `hugo new posts/<slug>.md` → `archetypes/default.md`
+- **Tags** only (no categories): `tags = ["GNU/Linux", "Tools"]`
 
 ## Configuration quirks
 
-- Theme expects **all lowercase keys** under `params.anubis2`: `colortheme`, `enablecolorthemeswitcher`, `readnextposts`, `socialicons`, etc. — see `themes/anubis2/PARAMS.md`
-- `[params.anubis2.services.umami]` uses lowercase keys: `id`, `url`
-- Analytics only inject in production (`hugo.IsProduction`). For testing analytics locally: `hugo server --environment production`
-- Config uses modern Hugo keys: `locale` (not `languageCode`), `label` (not `languageName`)
-- `enableGitInfo = true` — `.Lastmod` is derived from git; template falls back to frontmatter `lastmod` when set
+- Theme requires **all lowercase keys** under `params.anubis2`: `colortheme`, `enablecolorthemeswitcher`, `readnextposts`, `socialicons`, etc. See `themes/anubis2/PARAMS.md`.
+- `[params.anubis2.services.umami]` keys are lowercase: `id`, `url`.
+- Analytics inject only in production (`hugo.IsProduction`). Test locally: `hugo server --environment production`.
+- Config uses modern Hugo keys: `locale` (not `languageCode`), `label` (not `languageName`).
+- `enableGitInfo = true` — `.Lastmod` derives from git; template prefers `.Params.lastmod` when set.
 
 ## Frontmatter reference
 
 ```toml
 date = 2024-10-26T16:59:23-03:00
-lastmod = 2026-05-09T00:00:00Z      # bare datetime, no quotes
+lastmod = 2026-05-09T00:00:00Z
 title = 'Post Title'
 description = "One-line summary for SEO and RSS"
 tags = ["tag1", "tag2"]
 canonical = "/posts/original-post"   # PT translations only
 ```
 
-## Deprecated Hugo keys (avoid)
+## Deprecated keys (avoid)
 
-- `languageCode` → use `locale`
-- `languageName` → use `label`
-- `.Site.LanguageCode` → use `.Site.Language.Locale`
+- `languageCode` → `locale`; `languageName` → `label`; `.Site.LanguageCode` → `.Site.Language.Locale`
+
+## Theme overrides (`layouts/` shadows theme)
+
+- `layouts/partials/head.html` — canonical from `Params.canonical`, Umami analytics (prod only)
+- `layouts/partials/post-info.html` — prefers `.Params.lastmod`, shows "[Last modified]" when different from date
+- `layouts/partials/footer-extra.html` — Ko-fi widget
+- `layouts/robots.txt` — custom sitemap for both languages