Refresh MEV tape timestamps and dataset card

README.md

@@ -4,11 +4,14 @@ pretty_name: Chainticks MEV Tape
 tags:
 - finance
 - crypto
+- data-analysis
 - parquet
 - duckdb
 - pandas
 - polars
 - agent-friendly
+task_categories:
+- tabular-regression
 configs:
 - config_name: default
   data_files:
@@ -20,6 +23,13 @@ configs:
 
 Public relay MEV rows, starting with Flashbots delivered payload bid traces.
 
+## Current Scope
+
+- **Coverage:** Public relay delivered-payload rows, starting with Flashbots-style MEV payload metadata.
+- **Best for:** MEV regime context, builder/relay concentration checks, and joining public relay activity to market microstructure features.
+- **Cadence:** append-only partitions, normally refreshed by the Chainticks nightly publisher.
+- **Timestamps:** UTC ISO-8601 strings when available. Null timestamp fields mean the source event did not include a timestamp at collection time.
+
 ```python
 import pandas as pd
 
@@ -42,6 +52,10 @@ LATEST_DATE.txt
 
 Rows must have `source_kind` in `['public_relay']`. Chainticks does not publish venue REST/API resale data in this dataset.
 
+## Known Limitations
+
+Relay coverage is provider-dependent and does not represent all private order flow or all block-building activity.
+
 ## Agent Prompt Snippet
 
 Use this dataset as append-only market context. Read `LATEST_DATE.txt`, inspect `_schema.json`, then load the relevant Parquet partition. Treat timestamps as UTC and preserve `source_kind` in downstream analysis.

_manifest.json

@@ -1,20 +1,27 @@
 {
   "dataset": "mev-tape",
   "files": [
+    "payloads/date=2026-05-10/part-0000.parquet",
     "payloads/date=2026-05-11/part-0000.parquet"
   ],
-  "generated_at": "2026-05-11T09:41:10.872253+00:00",
+  "generated_at": "2026-05-11T12:08:57.880882+00:00",
   "public_source_kinds": [
     "public_relay"
   ],
   "repo_id": "Chainticks/mev-tape",
   "row_counts": {
-    "payloads/2026-05-11": 100
+    "payloads/2026-05-10": 12,
+    "payloads/2026-05-11": 88
   },
   "time_ranges": {
+    "payloads/2026-05-10": {
+      "end": "2026-05-10T23:47:11Z",
+      "start": "2026-05-10T22:43:11Z",
+      "timezone": "UTC"
+    },
     "payloads/2026-05-11": {
-      "end": null,
-      "start": null,
+      "end": "2026-05-11T08:46:23Z",
+      "start": "2026-05-11T00:17:47Z",
       "timezone": "UTC"
     }
   }

payloads/date=2026-05-10/part-0000.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:598a50ccaa4b4a38d28a778220609cd68a6ddb554a4f30116860e66debd070a2
+size 12407

payloads/date=2026-05-11/part-0000.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8f27a40b37a7d9544dede6e221052d454d44e98c96f810b2dca56cca6e77786c
-size 36917
+oid sha256:2623fdec4c4eb5617e0d6d698fd542f7a511f79a1e84e3089ab59f931507d29c
+size 34770