diff --git a/README.md b/README.md
index 091e127..e075b2a 100644
--- a/README.md
+++ b/README.md
@@ -34,10 +34,13 @@ the complete geometry, property, and metadata mapping.
 
 ## Status
 
-The OpenUSD-independent `usdVectorCore` model and buffered `usdGeoJson` reader
-are implemented and tested. The authoring library emits an in-memory OpenUSD
-stage, and the GeoJSON FileFormat bundle is built from the generated OpenStrata
-template and verified against the pinned runtime.
+The OpenUSD-independent `usdVectorCore` model and the buffered and cursor-based
+lazy `usdGeoJson` readers are implemented and tested. Shared bounded feature
+batches and incremental authoring plans are available for measured large-data
+workloads; the production GeoJSON FileFormat path remains buffered until a
+reopenable two-pass source workflow is adopted. The authoring library emits an
+in-memory OpenUSD stage, and the GeoJSON FileFormat bundle is built from the
+generated OpenStrata template and verified against the pinned runtime.
 
 | Milestone | Scope | Status |
 | --- | --- | --- |
@@ -46,7 +49,7 @@ template and verified against the pinned runtime.
 | M2 | `usdGeoJson` FeatureCollection reader and MVP geometries | done |
 | M3 | OpenUSD authoring, triangulation, local-origin metadata | done |
 | M4 | FileFormat registration, `ArAsset`, arguments, integration tests | done: OpenStrata L0-L5 verified |
-| M5 | Scalability baseline and evidence-led bounded-memory improvements | in progress: baseline, cursor-based lazy materialization, and shared bounded batches |
+| M5 | Scalability baseline and evidence-led bounded-memory improvements | done: cursor-based lazy materialization, shared bounded batches, and bounded authoring plans |
 | M6 | Runtime composition validation with `usd-geospatial-runtime` | in progress: packaged local-runtime probe; external composition pending |
 | M7 | FlatGeobuf architecture validation | deferred |
 | M8 | Indexed partial-read and selective-composition contract | deferred |
@@ -64,6 +67,14 @@ ctest --test-dir build/core --output-on-failure
 Build the optional M5 scalability runner with
 `-DUSDVECTOR_ENABLE_BENCHMARKS=ON`. Its reproduction procedure and captured
 baseline are in [docs/reports/SCALABILITY_BASELINE.md](docs/reports/SCALABILITY_BASELINE.md).
+For example, this measures the lazy reader with bounded batches and bounded
+authoring planning:
+
+```powershell
+.\build\m5\tools\usd-vector-benchmark\usd-vector-benchmark.exe `
+    --reader lazy --authoring incremental --batch-size 256 `
+    --case points --count 10000
+```
 
 The OpenStrata workspace manifests are provided for the pinned `cy2026` /
 `usd` environment:
@@ -78,4 +89,7 @@ See [docs/README.md](docs/README.md) for the architecture and capability
 contracts. External dependencies are bounded under [third_party](third_party)
 and documented in [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).
 The ordered implementation plan is documented in
-[docs/roadmap/IMPLEMENTATION_PLAN.md](docs/roadmap/IMPLEMENTATION_PLAN.md).
\ No newline at end of file
+[docs/roadmap/IMPLEMENTATION_PLAN.md](docs/roadmap/IMPLEMENTATION_PLAN.md).
+Release artifacts are checked against the pinned runtime digest and carry
+SBOM/provenance evidence; placement and cross-component composition remain
+owned by `usd-geospatial-runtime`.
\ No newline at end of file
diff --git a/docs/roadmap/README.md b/docs/roadmap/README.md
index f8d1e66..e22920a 100644
--- a/docs/roadmap/README.md
+++ b/docs/roadmap/README.md
@@ -12,7 +12,7 @@ against acceptance evidence, not directory presence or format count.
 | M2 | `usdGeoJson`: FeatureCollection, all MVP geometries, properties, fixtures | implemented |
 | M3 | `usdVectorAuthoring`: Points, Curves, Mesh triangulation, metadata, origin | implemented |
 | M4 | `vector-geojson`: registration, ArAsset adapter, arguments, integration tests | implemented: OpenStrata L0-L5 verified |
-| M5 | Scalability measurement and evidence-led streaming improvements | in progress: baseline, lazy materialization, shared bounded batches, and bounded authoring plans |
+| M5 | Scalability measurement and evidence-led streaming improvements | implemented: baseline, lazy materialization, shared bounded batches, and bounded authoring plans; production plugin reads remain buffered pending a reopenable two-pass source workflow |
 | M6 | Runtime composition validation with `usd-geospatial-runtime` | in progress: packaged local-runtime probe; external composition pending |
 | M7 | FlatGeobuf as a format-independent architecture validation | deferred |
 | M8 | Indexed partial-read and selective-composition contract | deferred |