STACK IT FAST
Real tech stacks, with the rules that built them
STACK IT FAST shows how real software is actually built. Each of its 129 production stacks (Supabase, Cal.com, n8n, PostHog, Langfuse, Temporal and more) is read from the project's source code and pinned to a commit, with a layered stack, an architecture diagram, key design decisions and self-hosting notes. Next to every stack sits the rule set that keeps an AI coding agent on it: AGENTS.md, Cursor rules (.mdc) and installable Claude Code / Agent Skills (SKILL.md). Free to read, no signup needed.
Features
129 production stacks read from source and pinned to a commit
Architecture diagram, key decisions and self-hosting notes per project
27 AGENTS.md, Cursor (.mdc) and SKILL.md rule sets
2-minute stack survey with a starter prompt
Head-to-head comparisons and monthly insights
Use Cases
Pick a stack for a new project from architectures that already run in production
See how an open-source app is built before you self-host it
Drop an AGENTS.md or SKILL.md into your repo so Cursor, Claude Code or Codex follow the stack's conventions
Comments
Hi Fazier! I built STACK IT FAST because every "what is X built with" answer I found was either a marketing page or a guess. Each project page is audited against a specific commit of the repo: every stack item has to point at a file that exists at that commit, or it is marked as inferred. Today there are 129 stacks, architecture diagrams, head-to-head comparisons, and AGENTS.md / Cursor / SKILL.md rule sets you can drop into your own repo. It's free with no signup to read. Corrections are very welcome - if a page gets a project wrong, the claim form on the page reaches me directly.
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Comments
Hi Fazier! I built STACK IT FAST because every "what is X built with" answer I found was either a marketing page or a guess. Each project page is audited against a specific commit of the repo: every stack item has to point at a file that exists at that commit, or it is marked as inferred. Today there are 129 stacks, architecture diagrams, head-to-head comparisons, and AGENTS.md / Cursor / SKILL.md rule sets you can drop into your own repo. It's free with no signup to read. Corrections are very welcome - if a page gets a project wrong, the claim form on the page reaches me directly.
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