Issue 20 TanStack Start Wiki Implementation Notes

Summary

Implemented a durable wiki framework choice for dp scaffold init. The init flow now prompts for Next.js or TanStack Start, defaults to Next.js, writes <wiki-root>/wiki-framework.md, and includes the selected framework in the operator prompt. The generated wiki template emits either the existing Next.js app or a TanStack Start/Fumadocs app with equivalent project content, sync, Mermaid, source, search, and route scaffolding. dp update reads the wiki framework pin and preserves TanStack Start wikis.

Files Changed

• apps/cli/src/content/stage-scaffold.ts
• apps/cli/src/content/wiki.ts
• apps/cli/src/scaffold/stage.ts
• apps/cli/src/scaffold/stage.test.ts
• apps/cli/src/update/run.ts
• apps/cli/src/update/run.test.ts
• docs/README.md
• docs/runbooks/dp-cli-scaffolding.md
• docs/reference/dp-requirements.md
• apps/wiki/content/docs/project/specs/cli/issue-20-tanstack-start-wiki/*
• apps/wiki/content/docs/project/tech-debt/cli/issue-20-tanstack-start-wiki.md

Validation

• bun run --cwd apps/cli test -- src/scaffold/stage.test.ts src/update/run.test.ts

Manual Review Checklist

• Confirm generated default wiki output remains Next.js.
• Confirm generated TanStack Start output includes vite.config.ts, src/routes/docs/$.tsx, src/routes/api/search.ts, src/routes/__root.tsx, fumadocs-ui/provider/tanstack, and the shared project docs tree.
• Confirm dp update does not generate Next-only files for a wiki pinned to tanstack-start.
• Confirm docs describe the new framework pin and update preservation behavior.