Stop vibe coding.
Start spec driven development.
SpecManager turns AI-assisted development into a gated, git-tracked pipeline — PRD, architecture, plan, build — surfaced on a local kanban board. The speed of AI, with the discipline of real product work.
Free & open source · Node 20+ · Runs entirely on your machine
Vibe coding feels fast. Spec-driven stays fast.
Prompting for code with no plan is quick until the third change breaks the second one. SpecManager keeps the velocity and adds a spine.
Vibe coding
One long chat. Decisions live in your head and scroll away.
Spec-driven development
A gated pipeline where every stage is written down and approved.
Six gated stages, one local board.
Every feature moves left to right through the pipeline. Each stage produces an approved markdown artifact before the next can begin — this is the actual SpecManager board. 127.0.0.1:4317.
Gates are enforced in shared code — not in a prompt.
The builder physically cannot advance a feature past an unapproved stage. Approvals are yours to give, and every artifact is plain markdown committed to your repo.
Built for Claude Code today. More hosts planned.
SpecManager runs as a Claude Code plugin now. The pipeline is host-agnostic by design, so support for other AI coding tools is on the roadmap — presented as direction, not dated promises.
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Built by Product Managers, for Ai-gile teams.
“Every stage in SpecManager maps to something I've run in real Agile squads for a decade — a PRD, an architecture review, phased planning, a board. It's not ceremony bolted onto AI. It's the discipline that makes AI output something you can actually maintain.”
See it run end to end. Two walkthroughs, soon.
Full video + written walkthroughs are in production. Both core journeys are covered — a brand-new project, and a real existing codebase spread across several repos.
Greenfield — zero to spec'd in one sitting
Start an empty repo, run the pipeline from PRD through first build, and watch a clean kanban board fill up gate by gate.
Notify me when it's live →Existing project, multiple repos
Bring SpecManager into a live multi-repo codebase — anchor architecture to what already exists and plan changes without breaking the world.
Notify me when it's live →Installed in about a minute.
SpecManager is a Claude Code plugin. Copy the commands, run them in order, and open your board.
Prerequisites
Your next feature deserves a spec.
Bring structure to your AI workflow without losing the speed that made it worth using.