Merge branch 'fix_core_scripts' into quicken_mcode

docs/spec/pipeline.md

@@ -104,7 +104,8 @@ pit --emit-qbe script.ce > output.ssa
 | `streamline.cm` | Mcode IR optimizer |
 | `qbe_emit.cm` | Mcode IR → QBE IL emitter |
 | `qbe.cm` | QBE IL operation templates |
-| `internal/bootstrap.cm` | Pipeline orchestrator |
+| `internal/bootstrap.cm` | Cache seeder (cold start only) |
+| `internal/engine.cm` | Self-sufficient pipeline loader and orchestrator |
 
 ## Debug Tools