casket-ssg

Pure functional static site generator in Haskell.

Who Is This For?

• Haskell developers who want to build sites with tools they know and love

• Functional programming enthusiasts who appreciate compositional design

• Teams requiring reliability where type safety prevents runtime surprises

• Anyone frustrated by dynamic language site builders that fail at deploy time

Why casket-ssg?

Type Safety That Matters

Your site structure is checked at compile time. Missing templates, broken links, malformed frontmatter - all caught before deployment, not discovered by users.

Composable Pipelines

Content transformations compose like functions should. Chain markdown processing, templating, and asset handling with confidence that types align.

Lazy Large-Site Builds

Haskell’s lazy evaluation means casket-ssg only processes what’s needed. Incremental builds are natural, not bolted on.

Pandoc Integration

Best-in-class document conversion with full Pandoc support. Markdown, reStructuredText, Org-mode - your content, your format.

Quick Start

# Install
cabal update
cabal install casket-ssg

# Create a site
casket-ssg init my-site
cd my-site

# Build
casket-ssg build

# Preview locally
casket-ssg serve

Features

• Compile-time template validation - broken templates don’t build

• Strong frontmatter types - YAML parsing with schema enforcement

• Asset pipeline - CSS/JS processing with hash-based cache busting

• Incremental builds - only rebuild what changed

• Live reload - instant preview during development

• RSS/Atom feeds - generated automatically from content

• Sitemap generation - SEO-ready output

Requirements

• GHC 9.0 or later

• Cabal 3.0 or Stack 2.0

Part of poly-ssg

casket-ssg is part of the poly-ssg family of language-native static site generators, unified through MCP integration.

License

PMPL-1.0-or-later