Add language-neutral project onboarding

README.md

@@ -101,6 +101,16 @@ Start an MCP server for one project:
 Add `--canonical-applier project-editor` only when that MCP integration should expose the
 hash-bound `docforge_apply_changeset` tool.
 
+For an unconfigured codebase, begin with a read-only language and documentation assessment:
+
+```bash
+.venv/bin/docforge --project-root /absolute/path/MyProject onboard
+```
+
+Add `--scaffold`, a stable project ID, and a title to create, index, and render a generic starter
+manual. Source files are reported separately and require a validated language frontend before
+DocForge describes them as a source graph.
+
 ## Documentation
 
 - [User manual](docs/USER_MANUAL.md) — features, setup, visualization, CLI, MCP, apply, adapters,
@@ -112,6 +122,8 @@ hash-bound `docforge_apply_changeset` tool.
   serialization.
 - [Incremental adapter indexing](docs/INCREMENTAL_INDEXING.md) — source-scoped extraction,
   invalidation, equivalence, relationship changes, and the lazy Logic boundary.
+- [Project onboarding](docs/PROJECT_ONBOARDING.md) — repository assessment, safe manual
+  scaffolding, language frontends, source/manual integration, proof, and MCP activation.
 
 ## Development