session-start-housekeeping

Monochromatic

A TypeScript monorepo (48 packages) for web applications, design systems, developer tooling, and AI integrations.

Highlights

Minimal MCP server -- mcp-stdio implements the Model Context Protocol in 800 lines with zero runtime dependencies. The official @modelcontextprotocol/sdk pulls 5.8 MB and 17 dependencies (Express, Hono, jose, OAuth, rate limiting, SSE); this package implements only JSON-RPC 2.0, initialization handshake, tools/list, tools/call, and ping.

Inference canary -- inference-canary runs five code-generation probes (CSV parser, expression evaluator, CSS mixin transpiler, stack interpreter, task scheduler) against 8 LLM models in parallel. Each probe executes inside a locked-down Podman container (no network, read-only filesystem, 256 MB memory, 15 s timeout) and scores across correctness, lint quality (oxlint), and type safety (tsgo). Statistical threshold detection (mean - 2*stddev) flags model degradation before it affects development.

Security-audited dependency selection -- AUDIT.md documents source-code audits with dates and verdicts for every non-trivial dependency. Framework selection rejected Elysia after discovering an RCE vulnerability chain through new Function() code generation (GHSA-8vch-m3f4-q8jf) and measuring a 45x performance regression (3,853 vs 175,951 req/s) when AOT compilation was disabled. See PHILOSOPHY.tool-choices.md for the full analysis of h3 vs Elysia vs Hono.

Custom Oxlint plugins -- oxlint-tsdoc enforces TSDoc correctness across 20+ rules with 23 fixture-based tests, replacing the slow eslint-plugin-jsdoc integration that previously required ESLint. oxlint-no-restricted-syntax encodes 13 monorepo-specific AST rules (no arrow functions, no switch statements, require destructured params for 2+ args) that Oxlint's lack of AST selectors demands as dedicated rule implementations.

Monorepo-aware CSS build tool -- build-tool-css resolves @import through package.json exports mappings and node_modules, processes custom @mixin/@apply syntax, and generates CSS strings for Shadow DOM injection -- all without native binaries.

OpenTofu firewall automation -- config-tofu dynamically aggregates CIDR ranges from 7 CDN sources (Cloudflare, CloudFront, Fastly, GitHub, YouTube, Ubuntu ASN, Coolify), summarizes them to minimize Hetzner firewall rule count, and caches ASN lookups for 30 days with graceful fallback to expired cache on fetch failure.

Custom typeface from SVG geometry -- typeface-aquaticat parses a master glyph strip SVG, expands stroked outlines into filled contours using polygon offset math, assembles an OpenType font via opentype.js, and converts to WOFF2 through fonttools.

Initial setup

Prerequisites

Install Mise (task runner and tool version manager). All other tools (Bun, Node, dprint, etc.) are installed automatically by Mise.

Clone and bootstrap

git clone https://github.com/Aquaticat/Monochromatic.git
cd Monochromatic

On first entry, Mise will warn about missing tools and an enter hook error because nushell is not installed yet. This is expected. Run manually once:

mise install

Then trust the configuration so Mise evaluates environment variables and templates:

mise trust

Trusting the monorepo root implicitly trusts all descendant mise.toml files under packages/. See mise trust docs for details on what this enables and why it is required.

Finally, install dependencies and build all packages:

mise run prepareAndBuild

Subsequent directory entries trigger the enter hook automatically, which runs mise install and mise upgrade to keep tools current.

Essential commands

All builds and tasks use mise run. Never invoke raw tools (tsc, tsdown, bun test, oxlint) or package manager scripts (npm run, pnpm exec) directly.

# Build all packages
mise run build

# Run all tests (unit + browser + e2e)
mise run test

# Build then test (use this after editing source)
mise run buildAndTest

# Build and test a specific file
mise run buildAndTest -- packages/module/es/src/boolean.equal.unit.test.ts

# Format all files
mise run format

# Full validation: format, build, test
mise run validate

# Watch mode
mise run watch:build
mise run watch:test

Run a task in a specific package with the monorepo path prefix:

mise run //packages/module/es:test
mise run //packages/webapp-productivity/done:build

Project structure