Add the Plugin.contributePages hook and a contribution phase in the content loader (after file-page registration, before aggregation) that collects ContributedPage[] and runs them through the normal pipeline — the underlying primitive both the entityRoutes adapter and third-party plugins build on.
Tracking started May 25 — check back for trends.
Plugin.contributePages interface defined (optional; sync or async; context with registry, projectRoot, site config, pipeline ctx)ContributedPage shape { url, title, frontmatter, content }; output pages carry source.type === "contributed" (plugin + ruleIndex){% ref %}contributePages → build warning, build continues with that plugin skipped; empty return is a no-opNone — core pipeline work; WORK-268 builds the entityRoutes adapter on top.
Completed: 2026-05-25
Branch: claude/v0.16.0
packages/types/src/pipeline.ts: added Plugin.contributePages hook (Phase 2.5; sync/async), ContributedPage ({ url, title?, frontmatter?, content, source? }) and ContributePagesContext (registry, projectRoot?, siteConfig?) types; added 'contribute' to the PipelineWarning phase union. Re-exported from the types index.packages/content/src/pipeline.ts: runPipeline gains RunPipelineOptions and a contribution phase between register and aggregate — collects contributions from every hookSet, renders each via a loader callback, handles collisions (file-backed wins with a warning; contributed-vs-contributed errors), then runs a second register pass over the new pages so their own entities index (one level deep — no recursive contribution). Result/stat assembly switched to the combined allPages.packages/content/src/site.ts: SitePage.source (file | contributed); a renderContributed callback that applies basePath, resolves the layout + tint cascade for the synthetic URL, and runs the same transform (incl. deferBody capture) as a file page; file pages tagged source.type='file'; siteConfig threaded through to contributePages.packages/content/test/contribute-pages.test.ts (4) — registry visible to contributePages, contributed page rendered + post-processed + counted, file-wins collision (warn), contributed collision (error), no-op. Full content suite (155) green.{% ref %} inclusion is satisfied by construction — contributed pages join the same pages array and go through register/aggregate/postProcess indistinguishably from file pages.