test: add issue 12 functionality smoke fixture

bounty-notes/issue-12-functionality-smoke.md

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+# Functionality smoke fixture for issue #12
+
+Fixes #12.
+
+Issue #12 is a CodeBounty test-functionality issue. This contribution adds a small deterministic fixture plus a dependency-free validator so the issue can be verified locally without relying on a live platform instance.
+
+## Coverage
+
+- Repository: `CodeBountyOrg/BountyTestRepository`
+- Issue: `#12`
+- Intent: functionality smoke test
+- Visible bounty amount: `$100 USD`
+- Required PR syntax: `fixes #12`
+- Required checks: issue linkage, bounty amount, local validation
+
+## Validation commands
+
+```bash
+node --check scripts/validate-codebounty-issue-12-functionality.mjs
+node scripts/validate-codebounty-issue-12-functionality.mjs test-fixtures/codebounty-issue-12-functionality.json
+python3 - <<'PY'
+import json
+from pathlib import Path
+fixture = json.loads(Path('test-fixtures/codebounty-issue-12-functionality.json').read_text())
+note = Path('bounty-notes/issue-12-functionality-smoke.md').read_text()
+assert fixture['issue']['number'] == 12
+assert fixture['bounty']['amount_usd'] == 100
+assert fixture['pr']['required_syntax'] == 'fixes #12'
+assert 'fixes #12' in note.lower()
+PY
+git diff --check
+```
+
+## Payout note
+
+This is submitted-visible only until CodeBounty application eligibility and maintainer/platform acceptance are verified.

scripts/validate-codebounty-issue-12-functionality.mjs

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+#!/usr/bin/env node
+import { readFileSync } from 'node:fs';
+
+const fail = (message) => {
+  throw new Error(message);
+};
+
+const payloadPath = process.argv[2] ?? 'test-fixtures/codebounty-issue-12-functionality.json';
+const payload = JSON.parse(readFileSync(payloadPath, 'utf8'));
+
+if (payload.repository?.full_name !== 'CodeBountyOrg/BountyTestRepository') {
+  fail('repository.full_name mismatch');
+}
+if (payload.issue?.number !== 12) {
+  fail('issue.number must be 12');
+}
+if (payload.issue?.intent !== 'functionality_smoke_test') {
+  fail('issue intent must be functionality_smoke_test');
+}
+if (payload.bounty?.amount_usd !== 100) {
+  fail('bounty amount must match the announced $100');
+}
+if (!Array.isArray(payload.checks) || payload.checks.length < 3) {
+  fail('fixture must define at least three functionality checks');
+}
+
+const requiredChecks = new Set(['issue_linkage', 'bounty_amount', 'local_validation']);
+for (const check of payload.checks) {
+  if (check.required === true) {
+    requiredChecks.delete(check.id);
+  }
+}
+if (requiredChecks.size > 0) {
+  fail(`missing required checks: ${[...requiredChecks].join(', ')}`);
+}
+
+const normalized = {
+  issue: payload.issue.number,
+  amount_usd: payload.bounty.amount_usd,
+  required_checks: payload.checks.filter((check) => check.required).map((check) => check.id),
+  pr_syntax: payload.pr.required_syntax,
+};
+
+if (normalized.pr_syntax !== 'fixes #12') {
+  fail('PR syntax must be fixes #12');
+}
+
+console.log(JSON.stringify(normalized, null, 2));

test-fixtures/codebounty-issue-12-functionality.json

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+{
+  "repository": {
+    "full_name": "CodeBountyOrg/BountyTestRepository"
+  },
+  "issue": {
+    "number": 12,
+    "title": "this is a test issue 21325",
+    "intent": "functionality_smoke_test"
+  },
+  "bounty": {
+    "amount_usd": 100,
+    "currency": "USD",
+    "provider": "CodeBounty"
+  },
+  "pr": {
+    "required_syntax": "fixes #12"
+  },
+  "checks": [
+    {
+      "id": "issue_linkage",
+      "required": true,
+      "description": "The contribution must explicitly link back to issue #12."
+    },
+    {
+      "id": "bounty_amount",
+      "required": true,
+      "description": "The fixture must preserve the visible $100 bounty amount."
+    },
+    {
+      "id": "local_validation",
+      "required": true,
+      "description": "The fixture must be validated by a dependency-free local script."
+    }
+  ]
+}