@ansvar/singapore-law-mcp/dist/scripts/drift-detect.js

Complete Singapore law database — 523 Acts, 28K+ provisions from Singapore Statutes Online (sso.agc.gov.sg) with full-text search, definitions, and citation support

#!/usr/bin/env tsx
/**
 * Drift detection for Singapore Law MCP.
 *
 * Checks if upstream SSO content has changed since last ingestion.
 * Uses the golden-hashes.json fixture to verify content integrity.
 */
import { readFileSync } from 'fs';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';
const __dirname = dirname(fileURLToPath(import.meta.url));
const hashesPath = join(__dirname, '../fixtures/golden-hashes.json');
async function main() {
    console.log('Singapore Law MCP — Drift Detection');
    console.log('====================================\n');
    const fixture = JSON.parse(readFileSync(hashesPath, 'utf-8'));
    console.log(`Checking ${fixture.provisions.length} provisions...\n`);
    let passed = 0;
    let failed = 0;
    let skipped = 0;
    for (const hash of fixture.provisions) {
        if (hash.expected_sha256 === 'COMPUTE_ON_FIRST_INGEST') {
            console.log(`  SKIP ${hash.id}: Not yet ingested`);
            skipped++;
            continue;
        }
        try {
            const response = await fetch(hash.upstream_url, {
                headers: { 'User-Agent': 'Singapore-Law-MCP/1.0 drift-detect' },
            });
            if (response.status !== 200) {
                console.log(`  WARN ${hash.id}: HTTP ${response.status}`);
                failed++;
                continue;
            }
            const body = await response.text();
            if (hash.expected_snippet && body.toLowerCase().includes(hash.expected_snippet.toLowerCase())) {
                console.log(`  OK   ${hash.id}: Snippet found`);
                passed++;
            }
            else {
                console.log(`  DRIFT ${hash.id}: Expected snippet "${hash.expected_snippet}" not found`);
                failed++;
            }
        }
        catch (error) {
            const msg = error instanceof Error ? error.message : String(error);
            console.log(`  ERROR ${hash.id}: ${msg}`);
            failed++;
        }
    }
    console.log(`\nResults: ${passed} passed, ${failed} failed, ${skipped} skipped`);
    if (failed > 0) {
        console.log('\nDrift detected! Data may need re-ingestion.');
        process.exit(1);
    }
}
main().catch(error => {
    console.error('Fatal error:', error);
    process.exit(1);
});
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