diff --git a/.claude/guidelines/database.md b/.claude/guidelines/database.md
index 3068e9b2b..8a74dadf3 100644
--- a/.claude/guidelines/database.md
+++ b/.claude/guidelines/database.md
@@ -131,13 +131,7 @@ New services: pick a short, unambiguous name (`auth`, not `mana_auth_schema`), a
 
 ### Verification
 
-Before merging a change that adds a new Drizzle schema file, confirm with:
-
-```bash
-rg "pgTable\(" services/ apps/api/ packages/ --type ts
-```
-
-Any hit that's not inside `mana-sync` is a violation. There's no automated lint rule yet — adding one is tracked in the architecture audit.
+Enforced by `pnpm run validate:pg-schema` (`scripts/validate-pg-schema-isolation.mjs`), wired into the CI `validate` job. Scans every TypeScript file under `services/`, `apps/api/`, and `packages/` for raw `pgTable(` call sites and fails the PR if any are found. Imports of the symbol are ignored — only actual call sites are violations.
 
 ## Schema Design
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 203dd9c47..574361be6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -443,6 +443,9 @@ jobs:
       - name: Validate no recursive turbo calls
         run: pnpm run validate:turbo
 
+      - name: Validate pgSchema isolation (no raw pgTable)
+        run: pnpm run validate:pg-schema
+
       - name: Audit crypto registry (Dexie ↔ registry ↔ allowlist)
         run: pnpm run check:crypto
 
diff --git a/package.json b/package.json
index 0628ac79f..db7558bba 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
 		"check:status": "bash scripts/check-status.sh",
 		"validate:dockerfiles": "node scripts/validate-dockerfiles.mjs",
 		"validate:turbo": "node scripts/validate-no-recursive-turbo.mjs",
+		"validate:pg-schema": "node scripts/validate-pg-schema-isolation.mjs",
 		"check:crypto": "node scripts/audit-crypto-registry.mjs",
 		"check:crypto:seed": "node scripts/audit-crypto-registry.mjs --seed",
 		"audit:deps": "node scripts/audit-workspace-deps.mjs",
diff --git a/scripts/validate-pg-schema-isolation.mjs b/scripts/validate-pg-schema-isolation.mjs
new file mode 100755
index 000000000..15b1d3f3a
--- /dev/null
+++ b/scripts/validate-pg-schema-isolation.mjs
@@ -0,0 +1,109 @@
+#!/usr/bin/env node
+/**
+ * Validate that every Drizzle table declaration uses `pgSchema('x').table(...)`
+ * instead of raw `pgTable(...)`.
+ *
+ * Why: `mana_platform` is one shared Postgres database for every service.
+ * Without schema namespacing, a `users` table in one service collides with
+ * `users` in another. The rule is in `.claude/guidelines/database.md` but
+ * was enforced only by convention until now — a new service could slip
+ * a raw `pgTable()` past review and pollute the default `public` schema.
+ *
+ * Rule: no call-site of `pgTable(` may appear in TypeScript under
+ * `services/`, `apps/api/`, or `packages/`. Imports of the symbol are
+ * ignored (they can still be useful for types), only actual calls are
+ * violations.
+ *
+ * Exception list: none. `mana-sync` is Go; it has no .ts schema files
+ * to begin with. Projection tables on top of `mana_sync` (e.g.
+ * `mana-ai`'s mission_snapshots) use `pgSchema('mana_ai').table(...)`
+ * to stay out of the core sync namespace.
+ *
+ * Zero deps — plain Node ESM. Uses `git ls-files` so node_modules and
+ * build output are auto-excluded.
+ */
+
+import { execSync } from 'node:child_process';
+import { readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = join(__dirname, '..');
+
+/** Directories we scan for schema files. */
+const SCAN_GLOBS = ['services/**/*.ts', 'apps/api/**/*.ts', 'packages/**/*.ts'];
+
+/** Paths we never flag. `node_modules` and `dist` are already filtered by
+ *  `git ls-files`; this is for in-tree exceptions. */
+const ALLOWLIST_PATHS = [
+	// `dist/` directories that slipped into git. Defensive — shouldn't exist.
+	/\/dist\//,
+];
+
+function listTsFiles() {
+	const out = execSync(`git ls-files ${SCAN_GLOBS.map((g) => `"${g}"`).join(' ')}`, {
+		cwd: REPO_ROOT,
+		encoding: 'utf8',
+	});
+	return out
+		.split('\n')
+		.map((p) => p.trim())
+		.filter(Boolean)
+		.filter((p) => !ALLOWLIST_PATHS.some((re) => re.test(p)));
+}
+
+/**
+ * Strip // line comments and /* block comments *\/ so a doc-comment
+ * mentioning `pgTable()` doesn't trigger a false positive.
+ */
+function stripComments(source) {
+	return source.replace(/\/\*[\s\S]*?\*\//g, '').replace(/\/\/[^\n]*/g, '');
+}
+
+function validate() {
+	const files = listTsFiles();
+	const violations = [];
+	let scanned = 0;
+
+	for (const rel of files) {
+		scanned++;
+		const abs = join(REPO_ROOT, rel);
+		let source;
+		try {
+			source = readFileSync(abs, 'utf8');
+		} catch {
+			continue; // deleted between ls-files and read
+		}
+		const stripped = stripComments(source);
+		// Find each line that calls `pgTable(`. Import lines look like
+		// `import { pgTable } from ...` — they never have `pgTable(` so
+		// they're auto-excluded by this regex.
+		const lines = stripped.split('\n');
+		for (let i = 0; i < lines.length; i++) {
+			if (/\bpgTable\s*\(/.test(lines[i])) {
+				violations.push(
+					`${rel}:${i + 1}: raw \`pgTable(\` call — use \`pgSchema('<name>').table(...)\` instead. ` +
+						`See .claude/guidelines/database.md §"Schema Isolation".`
+				);
+			}
+		}
+	}
+
+	if (violations.length > 0) {
+		console.error(`\n✗ pgSchema isolation check FAILED (${violations.length} violation(s)):\n`);
+		for (const v of violations) console.error(`  • ${v}`);
+		console.error(
+			`\nEvery Drizzle table in this monorepo must live under its own Postgres schema. ` +
+				`A raw \`pgTable()\` call drops the table into the default \`public\` schema and ` +
+				`risks colliding with other services sharing \`mana_platform\`.\n`
+		);
+		process.exit(1);
+	}
+
+	console.log(
+		`✓ No raw pgTable() calls: scanned ${scanned} TypeScript files under services/, apps/api/, packages/.`
+	);
+}
+
+validate();
diff --git a/services/mana-subscriptions/src/db/schema/subscriptions.ts b/services/mana-subscriptions/src/db/schema/subscriptions.ts
index 180df5761..909e0ffdd 100644
--- a/services/mana-subscriptions/src/db/schema/subscriptions.ts
+++ b/services/mana-subscriptions/src/db/schema/subscriptions.ts
@@ -6,7 +6,6 @@
 
 import {
 	pgSchema,
-	pgTable,
 	uuid,
 	integer,
 	text,