Publish MedMCQA practice corpus build artefacts

README.md

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+---
+license: apache-2.0
+---
+
+# MedMCQA practice corpus (build artefact)
+
+Build output of the ETL in
+[medmcqa-practice](https://github.com/). Not the original dataset - this is a
+normalised, validated SQLite build of it, published here only so a Git-based
+host can download it at deploy time (it is too large for a Git repository).
+
+| File | Purpose |
+|---|---|
+| `corpus.sqlite` | 186,791 questions + FTS5 index |
+| `manifest.json` | Build metadata, counts, and the answer-key checksum |
+| `facets.json` | Subject/topic counts |
+
+The application verifies `manifest.json`'s `answerKeyHash` against the
+database at startup and refuses to serve questions if they disagree, so a
+corrupted or substituted download fails closed rather than showing wrong answers.
+
+Source data: MedMCQA (Pal, Umapathi & Sankarasubbu, PMLR v174, 2022) -
+<https://github.com/medmcqa/medmcqa>, Apache-2.0.
+
+**Not clinical guidance.** Exam-preparation material containing known errata.

corpus.sqlite

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+version https://git-lfs.github.com/spec/v1
+oid sha256:77b2436f1ecc04199e530709a55c7e7406f39d818442860787e3611c4782a41f
+size 288530432

manifest.json

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+{
+  "builtAt": "2026-08-08T10:43:51.582Z",
+  "appVersion": "0.1.0",
+  "copIndexBase": 1,
+  "copDiagnostics": {
+    "rangeMin": 1,
+    "rangeMax": 4,
+    "markerComparable": 49391,
+    "markerAgree1": 48974,
+    "markerAgree0": 25
+  },
+  "sourceFiles": [
+    {
+      "file": "medmcqa/dev.json",
+      "bytes": 2594517,
+      "sha256": "a2b5f53890f4e742b728378fb847bc5338088d48ea01218676379f587270af31"
+    },
+    {
+      "file": "medmcqa/test.json",
+      "bytes": 1800237,
+      "sha256": "5cfb861ee583911a311b7bfe7c2de0db83bbaab2d3a7711ff949e489013187ae"
+    },
+    {
+      "file": "medmcqa/train.json",
+      "bytes": 147216696,
+      "sha256": "afa1b32379409fce3090a39411a769e5f1739d8bd2c43acb0806a3e070f711ba"
+    },
+    {
+      "file": "usmle/dev.jsonl",
+      "bytes": 2024697,
+      "sha256": "774bbd90103af43badbe8d5294e336443573fc37b918763920b8fc3b3df581d9"
+    },
+    {
+      "file": "usmle/test.jsonl",
+      "bytes": 2075679,
+      "sha256": "c3b905ccfa66152dc25afbcb2c10e86c0bdb208824f0658fcdb2c040f60a2beb"
+    },
+    {
+      "file": "usmle/train.jsonl",
+      "bytes": 16211077,
+      "sha256": "3a65baf760f17c395058d6699315a7ce8aa767c50cb193fea87ceb94dd790324"
+    }
+  ],
+  "counts": {
+    "raw": 205878,
+    "accepted": 199514,
+    "rejected": 214,
+    "duplicates": 18240,
+    "conflictingAnswerGroups": 1104,
+    "sessionEligible": 180170
+  },
+  "answerIndexHistogram": [
+    58118,
+    52135,
+    46590,
+    42671
+  ],
+  "answerKeyHash": "beee99db1a560c8f6b2f3f9e5ed0ca237d94aceef6a278807d2bb43631a409bb",
+  "sources": {
+    "medmcqa": {
+      "counts": {
+        "raw": 193155,
+        "accepted": 186791,
+        "rejected": 214,
+        "duplicates": 18240,
+        "conflictingAnswerGroups": 1104,
+        "sessionEligible": 167447
+      },
+      "answerIndexHistogram": [
+        54851,
+        48856,
+        43335,
+        39749
+      ],
+      "copIndexBase": 1,
+      "copDiagnostics": {
+        "rangeMin": 1,
+        "rangeMax": 4,
+        "markerComparable": 49391,
+        "markerAgree1": 48974,
+        "markerAgree0": 25
+      }
+    },
+    "usmle": {
+      "counts": {
+        "raw": 12723,
+        "accepted": 12723,
+        "rejected": 0,
+        "duplicates": 0,
+        "conflictingAnswerGroups": 0,
+        "sessionEligible": 12723
+      },
+      "answerIndexHistogram": [
+        3267,
+        3279,
+        3255,
+        2922
+      ],
+      "copIndexBase": null,
+      "copDiagnostics": null
+    }
+  }
+}