Add dataset curation reuse credit ledger

dataset-curation-reuse-credit-ledger/README.md

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+# Dataset Curation Reuse Credit Ledger
+
+This is a focused Community & User Reputation System slice for SCIBASE issue #15. It awards or quarantines reputation credit for downstream reuse of curated datasets and code, using citation evidence, license compatibility, self-reuse controls, duplicate evidence checks, and deterministic audit digests.
+
+## Scope
+
+- Allocates curator, validator, and maintainer credit from validated downstream reuse.
+- Requires citation evidence before awarding public reputation.
+- Checks license compatibility between source asset and reuse event.
+- Quarantines self-reuse until independent evidence exists.
+- Flags duplicate evidence hashes.
+- Emits profile-ready reputation deltas and reuse badges.
+- Emits stable `dcrcl_` audit digests for each reuse packet.
+
+It intentionally does not duplicate broad reputation ledgers, review-quality safeguards, abuse/appeals detectors, peer-review calibration, reviewer COI assignment, contributor credit attestation, transparency receipts, correction-impact ledgers, or mentorship impact ladders.
+
+## Run
+
+```powershell
+node dataset-curation-reuse-credit-ledger/test.js
+node dataset-curation-reuse-credit-ledger/demo.js
+```
+
+The demo writes:
+
+- `dataset-curation-reuse-credit-ledger/demo-output/reuse-credit-ledger.json`
+- `dataset-curation-reuse-credit-ledger/demo-output/demo.svg`
+
+This PR also includes the required short MP4 demo artifact:
+
+- `dataset-curation-reuse-credit-ledger/demo-output/demo.mp4`
+
+## API
+
+```js
+const {
+  auditReuseCredits,
+  buildReputationSummary,
+  createReuseDigest,
+} = require("./dataset-curation-reuse-credit-ledger");
+
+const audit = auditReuseCredits({ assets, reuseEvents, generatedAt });
+```

dataset-curation-reuse-credit-ledger/acceptance-notes.md

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+# Acceptance Notes
+
+## What This Adds
+
+- Dependency-free Node.js module under `dataset-curation-reuse-credit-ledger/`.
+- Deterministic reuse-credit audit packets for curated datasets and code.
+- Tests for valid credit allocation, unsafe evidence quarantine, profile-ready reputation summaries, and stable reuse digests.
+- Demo JSON, SVG, and MP4 artifacts for bounty review.
+
+## Verification
+
+Use these commands from the repository root:
+
+```powershell
+node dataset-curation-reuse-credit-ledger/test.js
+node dataset-curation-reuse-credit-ledger/demo.js
+node --check dataset-curation-reuse-credit-ledger/index.js
+node --check dataset-curation-reuse-credit-ledger/test.js
+node --check dataset-curation-reuse-credit-ledger/demo.js
+node --check dataset-curation-reuse-credit-ledger/sample-data.js
+ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height -of default=noprint_wrappers=1 dataset-curation-reuse-credit-ledger/demo-output/demo.mp4
+git diff --check
+```
+
+## AI Assistance Disclosure
+
+This contribution was prepared with AI assistance from OpenAI Codex and reviewed through local deterministic tests and artifact checks before submission.

dataset-curation-reuse-credit-ledger/demo-output/reuse-credit-ledger.json

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+{
+  "generatedAt": "2026-05-20T13:30:00.000Z",
+  "reusePackets": [
+    {
+      "eventId": "reuse-1",
+      "assetId": "dataset-cell-42",
+      "assetTitle": "Single-cell assay benchmark",
+      "assetType": "dataset",
+      "generatedAt": "2026-05-20T13:30:00.000Z",
+      "decision": "award_credit",
+      "flags": [],
+      "creditAllocations": [
+        {
+          "userId": "u-alina",
+          "assetId": "dataset-cell-42",
+          "points": 21,
+          "reason": "curator reuse credit"
+        },
+        {
+          "userId": "u-minh",
+          "assetId": "dataset-cell-42",
+          "points": 9,
+          "reason": "validator reuse credit"
+        }
+      ],
+      "actions": [
+        "Publish reuse credit to curator profiles"
+      ],
+      "reuseDigest": "dcrcl_c48af1209078c13469ce3a4d"
+    },
+    {
+      "eventId": "reuse-2",
+      "assetId": "dataset-cell-42",
+      "assetTitle": "Single-cell assay benchmark",
+      "assetType": "dataset",
+      "generatedAt": "2026-05-20T13:30:00.000Z",
+      "decision": "quarantine_credit",
+      "flags": [
+        "MISSING_CITATION",
+        "LICENSE_MISMATCH",
+        "SELF_REUSE",
+        "DUPLICATE_EVIDENCE"
+      ],
+      "creditAllocations": [],
+      "actions": [
+        "Add citation evidence for reuse-2",
+        "Resolve CC0 vs CC-BY-4.0 license mismatch",
+        "Require independent reuse evidence before awarding curator reputation",
+        "Deduplicate evidence hash sha256:evidence-1"
+      ],
+      "reuseDigest": "dcrcl_1098b9741d89e72ac0581b45"
+    },
+    {
+      "eventId": "reuse-3",
+      "assetId": "code-qc-7",
+      "assetTitle": "QC pipeline",
+      "assetType": "code",
+      "generatedAt": "2026-05-20T13:30:00.000Z",
+      "decision": "award_credit",
+      "flags": [],
+      "creditAllocations": [
+        {
+          "userId": "u-minh",
+          "assetId": "code-qc-7",
+          "points": 15,
+          "reason": "maintainer reuse credit"
+        }
+      ],
+      "actions": [
+        "Publish reuse credit to curator profiles"
+      ],
+      "reuseDigest": "dcrcl_bca70185e357d2e0deffdc38"
+    }
+  ],
+  "reputationSummary": {
+    "counts": {
+      "reuseEvents": 3,
+      "awarded": 2,
+      "quarantined": 1,
+      "duplicateEvidence": 1,
+      "licenseIssues": 1
+    },
+    "reputationDeltas": [
+      {
+        "userId": "u-alina",
+        "points": 21,
+        "badges": [
+          "dataset_reuse_curator"
+        ]
+      },
+      {
+        "userId": "u-minh",
+        "points": 24,
+        "badges": [
+          "code_reuse_maintainer",
+          "dataset_reuse_validator"
+        ]
+      }
+    ]
+  }
+}

dataset-curation-reuse-credit-ledger/demo.js

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+const fs = require("fs");
+const path = require("path");
+
+const { auditReuseCredits } = require("./index");
+const { assets, reuseEvents } = require("./sample-data");
+
+const generatedAt = "2026-05-20T13:30:00.000Z";
+const outputDir = path.join(__dirname, "demo-output");
+
+fs.mkdirSync(outputDir, { recursive: true });
+
+const audit = auditReuseCredits({ assets, reuseEvents, generatedAt });
+fs.writeFileSync(path.join(outputDir, "reuse-credit-ledger.json"), `${JSON.stringify(audit, null, 2)}\n`);
+fs.writeFileSync(path.join(outputDir, "demo.svg"), buildSvg(audit));
+
+console.log("Dataset curation reuse credit ledger demo");
+console.log(`Reuse events: ${audit.reputationSummary.counts.reuseEvents}`);
+console.log(`Awarded: ${audit.reputationSummary.counts.awarded}`);
+console.log(`Quarantined: ${audit.reputationSummary.counts.quarantined}`);
+console.log(`License issues: ${audit.reputationSummary.counts.licenseIssues}`);
+console.log(`Wrote ${path.join(outputDir, "reuse-credit-ledger.json")}`);
+console.log(`Wrote ${path.join(outputDir, "demo.svg")}`);
+
+function buildSvg(audit) {
+  const rows = audit.reusePackets.map((packet, index) => {
+    const y = 196 + index * 82;
+    const color = packet.decision === "award_credit" ? "#1f8a5b" : "#b42318";
+    const flags = packet.flags.length === 0 ? "Credit awarded" : packet.flags.join(" | ");
+    return `<g transform="translate(64 ${y})">
+    <rect width="832" height="60" rx="8" fill="#ffffff" stroke="#cfd8dc"/>
+    <circle cx="26" cy="30" r="10" fill="${color}"/>
+    <text x="48" y="25" class="team">${escapeXml(packet.eventId)} - ${escapeXml(packet.assetTitle)}</text>
+    <text x="48" y="45" class="meta">${escapeXml(formatDecision(packet.decision))}</text>
+    <text x="330" y="25" class="small">${escapeXml(flags)}</text>
+    <text x="330" y="45" class="small">${escapeXml(packet.reuseDigest)}</text>
+  </g>`;
+  }).join("");
+
+  const deltas = audit.reputationSummary.reputationDeltas
+    .map((delta) => `${delta.userId} +${delta.points}`)
+    .join("  ");
+
+  return `<svg xmlns="http://www.w3.org/2000/svg" width="960" height="520" viewBox="0 0 960 520" role="img" aria-label="Dataset curation reuse credit ledger demo">
+  <style>
+    .title { font: 700 28px Arial, sans-serif; fill: #102027; }
+    .subtitle { font: 400 15px Arial, sans-serif; fill: #455a64; }
+    .metric { font: 700 24px Arial, sans-serif; }
+    .label { font: 400 13px Arial, sans-serif; fill: #546e7a; }
+    .team { font: 700 16px Arial, sans-serif; fill: #102027; }
+    .meta { font: 400 13px Arial, sans-serif; fill: #455a64; }
+    .small { font: 400 11px Arial, sans-serif; fill: #607d8b; }
+  </style>
+  <rect width="960" height="520" fill="#f4f7f9"/>
+  <text x="64" y="58" class="title">Dataset Curation Reuse Credit Ledger</text>
+  <text x="64" y="84" class="subtitle">Community reputation from downstream dataset and code reuse</text>
+  ${metricCard(64, 112, "Reuse", audit.reputationSummary.counts.reuseEvents, "#0b5fff")}
+  ${metricCard(252, 112, "Awarded", audit.reputationSummary.counts.awarded, "#1f8a5b")}
+  ${metricCard(440, 112, "Quarantine", audit.reputationSummary.counts.quarantined, "#b42318")}
+  ${metricCard(628, 112, "License", audit.reputationSummary.counts.licenseIssues, "#ad6f00")}
+  ${rows}
+  <text x="64" y="478" class="subtitle">${escapeXml(deltas)}</text>
+</svg>`;
+}
+
+function metricCard(x, y, label, value, color) {
+  return `<g transform="translate(${x} ${y})">
+    <rect width="150" height="58" rx="8" fill="#ffffff" stroke="#cfd8dc"/>
+    <text x="18" y="25" class="metric" fill="${color}">${value}</text>
+    <text x="18" y="45" class="label">${escapeXml(label)}</text>
+  </g>`;
+}
+
+function formatDecision(decision) {
+  return decision.split("_").map((part) => part[0].toUpperCase() + part.slice(1)).join(" ");
+}
+
+function escapeXml(value) {
+  return String(value)
+    .replace(/&/g, "&amp;")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;");
+}