diff --git a/README.md b/README.md
index 4024b6644e369d696242b4300218525e18dddd40..f4dd173301dfc15146659c96d01094d87044554c 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ here — "uncurated" describes the *absence* of any quality/dedup/balance/safety
 beyond what upstream CommonPool already does.
 
 **License / use:** non-commercial research only, consistent with the upstream DataComp /
-CommonPool terms. This repository is private to the dataset owner.
+CommonPool terms.
 
 ## Structure: data vs. manifest
 
@@ -53,15 +53,18 @@ without touching the rest of the pool**:
 
 ## Splits — defined at the shard level, not the sample level
 
-Samples are globally shuffled once, then assigned to splits in whole **shard-sized chunks**
-(default 10,000 samples/shard): the first N shards become `val`, the next M become `test`,
-everything after that is `train`. This means:
+Samples are randomized via a streaming shuffle (raw input shard order is shuffled, plus a
+50,000-sample sliding shuffle buffer downstream — chosen so the full ~5.7M-image build never
+has to hold the whole pool in memory), then assigned to splits in whole **shard-sized chunks**
+(10,000 samples/shard): the first chunk becomes `val`, the next becomes `test`, everything
+after that is `train`. This means:
 
 - Splits are **disjoint sets of tar files**, so pulling `val` or `test` (or a `train` scale
   tier) is just downloading those specific shards — no need to touch `manifest.parquet` or
   decode unrelated shards first.
-- No fixed random seed is used for the shuffle — this artifact is meant to be used as-is, not
-  regenerated bit-for-bit.
+- No fixed random seed is used — this artifact is meant to be used as-is, not regenerated
+  bit-for-bit. The shuffle is good enough to avoid gross ordering bias but is not a uniform
+  global permutation.
 
 > **Note on val/test:** this pool is unlabeled. `val`/`test` are held-out *image* sets for
 > loss monitoring / leakage control during pretraining, not a labeled evaluation set.
@@ -79,5 +82,7 @@ everything after that is `train`. This means:
 
 ## Versions
 
-- `v0.1` — pilot, ~130 raw input shards.
-- `v1.0` — full build, all raw input shards (~5.7M images pre-filter).
+- `v0.1` — pilot. 130 raw input shards -> 112,046 samples (1 val + 1 test + 10 train shards).
+- `v1.0` — full build. All 6,540 raw input shards, 5,799,314 raw samples seen ->
+  **5,684,754 kept** (1 val + 1 test + 567 train shards, ~151GB). Scale tiers:
+  `xs`=570k/57 shards, `s`=2.84M/284 shards, `m`=5.67M/567 shards (all of train).
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--- a/data/test/test-000000.tar
+++ b/data/test/test-000000.tar
@@ -1,3 +1,3 @@
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+size 282368000
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