Adopter-facing docs updated to match Track B's page model. The primary rewrites (pages, sse, design \u00a721) shipped in the previous commit; this commit aligns the remaining shorter mentions so adopters reading any entry point see consistent guidance. README.md: replace the ctx-anchored Variable Visibility example with one that uses r.PathValue. Add a note that frontmatter has ambient (w, r) and the page handler runs for every method. Update the File-Based Routing table to method-less patterns and explain why. docs/components.md: drop the orphaned ctx := gastro.Context() line in the import-and-use example; the example doesn't need it and pages that import components no longer carry the marker by default. docs/architecture.md: realign the AnalyzeFrontmatter responsibilities, the GenerateHandler description, and the data-flow diagram with the Track B implementation. The diagram now shows a page using r.PathValue and notes that FrontmatterInfo carries marker / missing- return warnings. The new marker-rewrite allowlist is documented as a table inline with the codegen description. docs/comparison.md: update the Learning Curve row to drop gastro.Context() and lead with ambient (w, r). dev-mode.md and getting-started.md needed no changes \u2014 neither referenced gastro.Context() in the first place.