Add AGENTS.md guide for agentic software development

[diamantidis]

Plan

• Add an AGENTS.md file to guide agentic software development tools (like opencode, Cursor, etc.) on how to work with this Jekyll blog
• Adapted from a template used in another Jekyll project, tailored to this project's specific setup:
  • No separate CSS watcher (Tailwind runs via jekyll-postcss plugin)
  • GitHub Pages deployment (source → master branching)
  • Single language (English)
  • minima theme + SCSS + Tailwind via @apply directives
  • Danger + proselint CI
  • Tips collection
• Includes sections: Project Overview, Structure, Key Features, How to Run, Tailwind CSS Setup, Playwright Verification, Git Workflow, Best Practices

Tests

• Manual verification: Home page loads correctly
• Playwright smoke test: PASS
  • Home page navigation works with 7 paginated posts
  • Blog post page loads with title, content, code blocks, and metadata
  • Static pages (About, Archive) render correctly
  • Navigation links (Tips, About, Archive, Tags) functional
• Visual verification: Site renders correctly with styles

[github-actions]

Proselint found issues

AGENTS.md

Line	Message	Severity
215	'off' is the preferred form.	warning

Spell Checker found issues

AGENTS.md

Line	Typo
1	# AGENTS.md - Guide for Agentic Software
1	# AGENTS.md - Guide for Agentic Software Development
5	Ioannis Diamantidis's personal blog —
5	Ioannis Diamantidis's personal blog — a software de
5	tic site generator) using the minima theme and styled with a combi
7	Technology Stack*: Jekyll + minima theme + Tailwind CSS (via jek
7	ima theme + Tailwind CSS (via jekyll-postcss) + Ruby + Node.js
7	(via jekyll-postcss) + Ruby + Node.js
69	- Analytics: TelemetryDeck and PostHog
69	- Analytics: TelemetryDeck and PostHog (production envir
69	nalytics**: TelemetryDeck and PostHog (production environment only)
70	tHub Actions CI with Danger + proselint for prose linting on PRs
71	- SEO: jekyll-sitemap, jekyll-feed, and jekyll-seo-
71	- SEO: jekyll-sitemap, jekyll-feed, and jekyll-seo-tag
71	yll-sitemap, jekyll-feed, and jekyll-seo-tag
81	- Node.js 22.2.0
155	- How it works: PostCSS processes CSS files during Je
156	- Config: postcss.config.js loads
156	oads Tailwind CSS and applies cssnano in production (`JEKYLL_ENV=pr
177	aded with title, content, and metadata
207	## Git Workflow with gh-cli
285	### Useful gh-cli Commands
304	ded** — Tailwind runs through jekyll-postcss automatically

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