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Spec Kit vs SkeletIQ: a spec your agent writes, or a design you release
Spec Kit is an open source toolkit that walks your coding agent from a spec to a plan to tasks, all held to a constitution you set. SkeletIQ settles the system around those features first: a design critiqued by fixed rules and released by you, which your agent builds from and reports against. They solve different halves of the same problem.
Pick Spec Kit if you want your coding agent to spec, plan and build features one at a time, held to your own principles. Pick SkeletIQ if the system design needs settling first, critiqued and released by a person before any agent builds.
Checked November 12, 2026. Every claim about another product here comes from its own site, docs or repository, checked on the date shown. Report a mistake
What Spec Kit does well
A process your agent follows
Spec Kit gives coding agents structured steps and reusable templates. Your agent creates the feature spec from a plain description, asks targeted questions about anything underspecified, generates the design artifacts and a dependency-ordered task list, then carries out the tasks in that order. It is open source, under the MIT licence. Spec Kit README (opens in a new tab) Spec Kit quickstart (opens in a new tab)
A constitution every step answers to
You start by setting the project's guiding principles, and every later step is evaluated against them. That puts whatever your team insists on in one place the agent works from, instead of scattered through old chat history, and it means a new feature is held to the same principles as the last one. Spec Kit quickstart (opens in a new tab)
Consistency checks across the artifacts
Spec Kit's analyze step reports conflicts, gaps and ambiguities across the spec, the plan and the task list. A checklist step generates what the docs call unit tests for your requirements, to confirm the spec is complete, clear and consistent. Problems surface while they are still in text, before your agent writes code around them. Spec Kit quickstart (opens in a new tab)
Where the two differ
A spec the agent writes, or a design a person releases
In Spec Kit, your coding agent drafts the spec and the plan, then checks them against each other and your constitution. In SkeletIQ, the design is generated from your requirements and critiqued by rules that give the same findings each time they run. Nothing reaches your agent until you release it, so the architecture is a decision you made, not one made on the way. Spec Kit quickstart (opens in a new tab)
Where the architecture comes from
Spec Kit's plan step is where you provide your tech stack and architecture. SkeletIQ is a way to arrive at that architecture: components, data stores and connections, a cost estimate, the requirements each part answers, and the questions still open, each with a suggested default. You can give that design to the plan step instead of typing it from memory. Spec Kit quickstart (opens in a new tab)
Ordered tasks, and an order for the whole system
Spec Kit orders a feature's tasks by dependency. A SkeletIQ brief lands in AGENTS.md with a build order for the whole system, keyed to the component IDs that check_drift uses, and it marks which parts are third-party services to integrate or stub rather than build. After a session, the agent reports against those IDs, so you see what is missing or extra. Spec Kit quickstart (opens in a new tab) See the brief and its build order
| # | ID | Component | Technology | Depends on | Why here |
| 7 | auth_service | Authentication Service (SSO) (third-party) | — | — | Outside your control — integrate or stub it, do not build it. |
| 9 | external_client | Web and Mobile Clients (client) | — | api_gateway | The caller, not something you build here — the boundary it defines. |
| 10 | email_service | Email Delivery Service (third-party) | — | — | Outside your control — integrate or stub it, do not build it. |Which one to choose
Choose Spec Kit when
- You want your coding agent to spec, plan and build each feature.
- You want every step held to a constitution your team writes.
- You want the spec, plan and tasks checked against each other.
Choose SkeletIQ when
- The system's architecture isn't settled and needs a critiqued design.
- You want a person to release the design before agents build from it.
- You want agents to report what they built against one build order.
Release the design here, then give it to Spec Kit's plan step as the architecture your features build on.
What SkeletIQ doesn't do
The app isn't open source
Spec Kit is open source from end to end. SkeletIQ's app is a hosted service; the MIT-licensed part is the connector that runs on your machine and talks to it. If your team needs every piece of its toolchain to be open source, that is a real difference, and you should weigh it.
It works on designs, not on your repository
SkeletIQ never sees your repository. It can't check a spec against your code or tell you a task is done; it records what your coding agent reports and checks the files the agent cites on your machine. Checks that run inside the repository, and your tests, still do that job.
Spec Kit pricing
Spec Kit has no paid plans. It is released under the MIT licence.
| Plan | Price |
|---|---|
| Spec Kit | PriceFreeMIT licence |
as of November 12, 2026 Spec Kit licence file (opens in a new tab)
SkeletIQ's plans, and what each includes, are on our pricing page. See SkeletIQ pricing