diff --git a/scripts/check-boundaries.mjs b/scripts/check-boundaries.mjs
index 5766ac78..97ffef64 100644
--- a/scripts/check-boundaries.mjs
+++ b/scripts/check-boundaries.mjs
@@ -68,6 +68,13 @@ const contextProductionLlmBoundaryPatterns = [
   },
 ];
 
+const concreteDialectImportPatterns = [
+  /from\s+['"][^'"]*connectors\/[^'"]+\/dialect\.js['"]/,
+  /import\s*\(\s*['"][^'"]*connectors\/[^'"]+\/dialect\.js['"]\s*\)/,
+  /from\s+['"]\.\/dialect\.js['"]/,
+  /import\s*\(\s*['"]\.\/dialect\.js['"]\s*\)/,
+];
+
 function normalizePath(filePath) {
   return filePath.split(path.sep).join('/');
 }
@@ -99,6 +106,13 @@ function scansForContextProductionLlmBoundaries(relativePath) {
   return scansForLlmBoundaries(relativePath) && !isTestSource(relativePath);
 }
 
+function scansForConcreteDialectImportBoundaries(relativePath) {
+  return (
+    relativePath.startsWith('packages/cli/src/context/scan/') ||
+    /^packages\/cli\/src\/connectors\/[^/]+\/connector\.ts$/.test(relativePath)
+  );
+}
+
 function scansForForbiddenIdentifiers(relativePath) {
   return (isCodeSource(relativePath) && !isTestSource(relativePath)) || isRuntimeAsset(relativePath);
 }
@@ -151,6 +165,19 @@ export function scanFileContent(relativePath, content) {
     }
   }
 
+  if (scansForConcreteDialectImportBoundaries(normalizedPath)) {
+    for (const pattern of concreteDialectImportPatterns) {
+      if (pattern.test(content)) {
+        violations.push({
+          file: normalizedPath,
+          kind: 'dialect-boundary',
+          message:
+            'Forbidden concrete connector dialect import; use getDialectForDriver() from context/connections/dialects.ts',
+        });
+      }
+    }
+  }
+
   if (
     scansForForbiddenIdentifiers(normalizedPath) &&
     !skipsIdentifierScan(normalizedPath) &&
diff --git a/scripts/check-boundaries.test.mjs b/scripts/check-boundaries.test.mjs
index 25cd0f85..1961eb5c 100644
--- a/scripts/check-boundaries.test.mjs
+++ b/scripts/check-boundaries.test.mjs
@@ -112,6 +112,43 @@ describe('scanFileContent', () => {
     );
   });
 
+  it('rejects concrete connector dialect imports from scan workflow and connector classes', () => {
+    const violations = [
+      ...scanFileContent(
+        'packages/cli/src/context/scan/relationship-profiling.ts',
+        "import { KtxPostgresDialect } from '../../connectors/postgres/dialect.js';",
+      ),
+      ...scanFileContent(
+        'packages/cli/src/connectors/postgres/connector.ts',
+        "import { KtxPostgresDialect } from './dialect.js';",
+      ),
+    ];
+
+    assert.deepEqual(
+      violations.map((violation) => violation.kind),
+      ['dialect-boundary', 'dialect-boundary'],
+    );
+    assert.equal(
+      violations[0]?.message,
+      'Forbidden concrete connector dialect import; use getDialectForDriver() from context/connections/dialects.ts',
+    );
+
+    assert.deepEqual(
+      scanFileContent(
+        'packages/cli/src/context/connections/dialects.ts',
+        "import { KtxPostgresDialect } from '../../connectors/postgres/dialect.js';",
+      ),
+      [],
+    );
+    assert.deepEqual(
+      scanFileContent(
+        'packages/cli/src/connectors/postgres/dialect.test.ts',
+        "import { KtxPostgresDialect } from './dialect.js';",
+      ),
+      [],
+    );
+  });
+
   it('rejects old KTX LLM port declarations in context', () => {
     const violations = [
       ...scanFileContent('packages/cli/src/context/agent/agent-runner.service.ts', 'export interface LlmProviderPort {}'),