# Method
Spec-driven documentation separates current agreement from historical rationale and executable behavior. Specifications state what binds, decision records state why a choice was made, and code or content shows the observed result.
Start with [the model](./00-model.md), use [placement](./01-placement.md) to choose a home, then follow the chapter that owns the artifact being changed. [The checklist](./99-checklist.md) is the pre-merge review surface.
To apply the method in another project, use the [instance guide](../instance/README.md) and choose the codebase or knowledge-base profile. Stable authoring seeds are available under [templates](../templates/).