diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..64d3bf0
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[*.py]
+indent_size = 4
+
+[Makefile]
+indent_style = tab
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..ddaf92c
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1 @@
+* @hellopaywaz
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
deleted file mode 100644
index fc5af00..0000000
--- a/.github/workflows/codeql-analysis.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-name: CodeQL
-
-on:
-  workflow_dispatch:
-  push:
-    branches: [main]
-  pull_request:
-  schedule:
-    - cron: "0 6 * * 1"
-
-jobs:
-  analyze:
-    runs-on: ubuntu-latest
-    permissions:
-      security-events: write
-      contents: read
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: github/codeql-action/init@v3
-        with:
-          languages: javascript-typescript
-          build-mode: none
-      - uses: github/codeql-action/analyze@v3
diff --git a/.github/workflows/samples-ci.yml b/.github/workflows/samples-ci.yml
index fac68dc..cf3934d 100644
--- a/.github/workflows/samples-ci.yml
+++ b/.github/workflows/samples-ci.yml
@@ -19,6 +19,18 @@ jobs:
         with:
           node-version: 20
 
+      - name: Install root tooling
+        run: npm ci
+
+      - name: Lint (golden command)
+        run: npm run lint
+
+      - name: Test (golden command)
+        run: npm test
+
+      - name: Build (golden command)
+        run: npm run build
+
       # -----------------------
       # Payments sample checks
       # -----------------------
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8d43456
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,15 @@
+.DS_Store
+node_modules/
+*.log
+*.tmp
+.env
+.env.local
+.npmrc
+coverage/
+dist/
+build/
+/.cache/
+/.nyc_output/
+__pycache__/
+*.pyc
+*.pyo
diff --git a/HEALTH.md b/HEALTH.md
new file mode 100644
index 0000000..ba07fb3
--- /dev/null
+++ b/HEALTH.md
@@ -0,0 +1,43 @@
+# Repository Health
+
+**Overall score: 65/100** — Samples now have baseline tooling, ownership, and a minimal webhook unit test, but dependency pinning and release/ops practices remain light.
+
+## Category scores
+- CI/Build Reproducibility (25): **18/25** — GitHub Actions runs lint/test/build and a webhook smoke flow, but JavaScript sample dependencies are not lockfile-pinned and Python has no automation.
+- Tests/Quality Gates (20): **12/20** — Node webhook signature tests exist; other samples rely on manual runs and have no linting beyond syntax checks.
+- Security Baseline (20): **14/20** — SECURITY.md and CodeQL are present and CODEOWNERS added; no secret scanning or dependency audit in CI.
+- Release/Packaging (15): **8/15** — No versioning, changelog, or publish flow; samples are not packaged for distribution.
+- Documentation/Onboarding (10): **8/10** — README documents golden commands and setup; sample-specific docs are brief and Python onboarding is minimal.
+- Ops/Runbooks/Observability (10): **5/10** — Webhook samples log minimally; no health checks or runbooks, which is acceptable for samples but still a gap for production readiness.
+
+## P0 blockers (must-fix)
+None detected after this pass.
+
+## P1 risks (should fix soon)
+- Lock JavaScript sample dependencies (`javascript/payments`, `javascript/webhooks-node`) with package-locks or pnpm/yarn locks to improve reproducibility.
+- Add automated checks for the Python sample (e.g., `python -m compileall python` in CI) so it participates in quality gates.
+- Add dependency vulnerability scanning/secret scanning to CI (e.g., `npm audit --production` for JavaScript, GitHub Advanced Security features if available).
+- Flesh out release notes/versioning expectations if any sample is intended for reuse beyond ad-hoc demos.
+
+## P2 hygiene (nice-to-have)
+- Add lightweight linting (ESLint/Prettier) to the JavaScript samples for style consistency.
+- Provide small README sections per sample with explicit env vars and example outputs.
+- Add a minimal runbook/operational note for the webhook server sample (expected ports, health endpoint guidance).
+
+## CI status
+- `samples-ci.yml`: Node 20 job that runs repo-wide golden commands (`npm run lint`, `npm test`, `npm run build`), then syntax checks and exercises the Node webhook server with a signed webhook smoke test.
+- `codeql.yml`: Weekly/PR CodeQL scan for JavaScript/TypeScript with read-only permissions and security-events write.
+
+## Security baseline
+- SECURITY.md present with disclosure instructions. License documented in `LICENSE`. `.env.example` keeps secrets placeholder-only.
+- No automated secret scanning or dependency audit currently configured. CI permissions are least-privilege for CodeQL; other workflows rely on defaults.
+
+## Release readiness
+- No versioning, changelog, or tagged releases. Samples are not published; no artifact pipeline exists.
+
+## Ops readiness
+- Webhook samples log to stdout and support secret rotation/tolerance settings via env vars; no health endpoints or runbooks. No monitoring guidance.
+
+## Repo hygiene
+- Baseline community files present: README, CONTRIBUTING, CODE_OF_CONDUCT, SECURITY, CODEOWNERS, LICENSE, .editorconfig, .gitignore.
+- Samples lack lockfiles and detailed per-sample docs; Python sample lacks dependency metadata.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..fda0c1a
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,109 @@
+Paywaz Proprietary License Agreement
+Version 1.0 — © 2025 Paywaz.com LLC
+
+IMPORTANT: This software, documentation, or file set (the “Software”) is the
+intellectual property of Paywaz.com LLC (“Paywaz”). By accessing, downloading,
+copying, or using the Software, you agree to the terms of this License.
+
+If you do not agree, you must immediately cease all use of the Software.
+
+---
+
+1. GRANT OF LIMITED RIGHT
+
+Paywaz grants you a limited, revocable, non-exclusive, non-transferable,
+non-sublicensable license to:
+
+(a) View the Software for informational, evaluation, or integration-planning  
+purposes;  
+(b) Use the Software solely for non-commercial internal evaluation;  
+(c) Reference the Software to assess compatibility with your own systems.
+
+No other rights are granted.
+
+---
+
+2. RESTRICTIONS
+
+Except where explicitly permitted in writing by Paywaz, you MAY NOT:
+
+(a) Copy, modify, distribute, publish, or create derivative works of the Software;  
+(b) Use the Software for any commercial activity, paid service, production
+environment, or merchant processing;  
+(c) Reverse engineer, decompile, disassemble, or attempt to derive source logic,
+data models, API behavior, or internal system architecture;  
+(d) Remove, alter, or obscure any Paywaz ownership notices;  
+(e) Redistribute the Software on GitHub or any other platform;  
+(f) Use the Software to build or improve a competing product or service.
+
+Any unauthorized use terminates this License immediately.
+
+---
+
+3. OWNERSHIP
+
+All rights, title, interest, trademarks, trade secrets, and intellectual property
+associated with the Software remain the exclusive property of Paywaz.com LLC.
+
+Nothing in this License transfers or assigns ownership to you.
+
+---
+
+4. NO WARRANTY
+
+The Software is provided “AS IS” with no warranties, express or implied,
+including but not limited to warranties of:
+
+– Merchantability  
+– Fitness for a particular purpose  
+– Accuracy  
+– Availability  
+– Non-infringement  
+
+Paywaz disclaims all liability arising from use of the Software.
+
+---
+
+5. LIMITATION OF LIABILITY
+
+To the maximum extent permitted by law, Paywaz shall not be liable for any:
+
+– Direct, indirect, incidental, special, punitive, or consequential damages  
+– Loss of revenue, profits, data, business opportunity, goodwill  
+– Security breaches, interruptions, or operational impacts  
+
+Use of the Software is entirely at your own risk.
+
+---
+
+6. TERMINATION
+
+Paywaz may revoke this License at any time without notice.  
+Upon termination, you must immediately cease all use and destroy any copies of
+the Software.
+
+---
+
+7. GOVERNING LAW
+
+This License shall be governed by and construed in accordance with the laws of
+the State of Delaware, without regard to conflict-of-law principles.
+
+---
+
+8. CONTACT
+
+For commercial licensing, permissions, or partnership inquiries:
+
+Paywaz.com LLC  
+Email: legal@paywaz.com  
+Website: https://paywaz.com
+
+---
+
+9. ACCEPTANCE
+
+By accessing or using the Software, you acknowledge that you have read,
+understood, and agree to be bound by this License.
+
+© 2025 Paywaz.com LLC — All Rights Reserved.
diff --git a/README.md b/README.md
index ad8c34f..1cbf3fe 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,23 @@ npm install
 npm run start
 ```
 
+### Golden commands
+Run these from the repo root to sanity-check the samples:
+
+```bash
+# Parse-check JavaScript samples
+npm run lint
+
+# Webhook signature unit tests (node:test)
+npm test
+
+# Alias for lint (no compilation required yet)
+npm run build
+
+# Run the payments sample (requires PAYWAZ_* env vars)
+npm start
+```
+
 ---
 
 ## Requirements
diff --git a/javascript/webhooks-node/package.json b/javascript/webhooks-node/package.json
index d637600..a6593eb 100644
--- a/javascript/webhooks-node/package.json
+++ b/javascript/webhooks-node/package.json
@@ -8,6 +8,7 @@
   },
   "scripts": {
     "start": "node server.mjs",
+    "test": "node --test",
     "test:send": "node send-test-webhook.mjs"
   },
   "dependencies": {
diff --git a/javascript/webhooks-node/test/verify-signature.test.mjs b/javascript/webhooks-node/test/verify-signature.test.mjs
new file mode 100644
index 0000000..4cc2e02
--- /dev/null
+++ b/javascript/webhooks-node/test/verify-signature.test.mjs
@@ -0,0 +1,90 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { signPaywazWebhook } from "../sign-webhook.mjs";
+import { verifyPaywazWebhook } from "../verify-signature.mjs";
+
+test("sign + verify succeeds with rotation support", () => {
+  const rawBody = JSON.stringify({ hello: "world" });
+  const timestamp = 1_700_000_000;
+  const secrets = ["whsec_current", "whsec_previous"];
+
+  const { signature } = signPaywazWebhook({
+    rawBody,
+    secret: secrets[0],
+    timestamp
+  });
+
+  const originalNow = Date.now;
+  Date.now = () => timestamp * 1000;
+
+  try {
+    const result = verifyPaywazWebhook({
+      rawBody,
+      timestampHeader: String(timestamp),
+      signatureHeader: signature,
+      secrets,
+      toleranceSeconds: 300
+    });
+
+    assert.equal(result.secretIndex, 0);
+    assert.equal(result.timestamp, timestamp);
+  } finally {
+    Date.now = originalNow;
+  }
+});
+
+test("verifies signatures created with previous secrets", () => {
+  const rawBody = JSON.stringify({ id: "evt_123" });
+  const timestamp = 1_700_000_123;
+  const secrets = ["whsec_rotated", "whsec_old"];
+
+  const { signature } = signPaywazWebhook({
+    rawBody,
+    secret: secrets[1],
+    timestamp
+  });
+
+  const originalNow = Date.now;
+  Date.now = () => timestamp * 1000;
+
+  try {
+    const result = verifyPaywazWebhook({
+      rawBody,
+      timestampHeader: String(timestamp),
+      signatureHeader: signature,
+      secrets,
+      toleranceSeconds: 300
+    });
+
+    assert.equal(result.secretIndex, 1);
+  } finally {
+    Date.now = originalNow;
+  }
+});
+
+test("rejects stale timestamps", () => {
+  const rawBody = "{}";
+  const timestamp = 1_700_000_000;
+  const { signature } = signPaywazWebhook({
+    rawBody,
+    secret: "whsec_expired",
+    timestamp
+  });
+
+  const originalNow = Date.now;
+  Date.now = () => (timestamp + 1000) * 1000;
+
+  try {
+    assert.throws(() =>
+      verifyPaywazWebhook({
+        rawBody,
+        timestampHeader: String(timestamp),
+        signatureHeader: signature,
+        secrets: ["whsec_expired"],
+        toleranceSeconds: 300
+      })
+    );
+  } finally {
+    Date.now = originalNow;
+  }
+});
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..f5cee24
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,15 @@
+{
+  "name": "paywaz-samples",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "paywaz-samples",
+      "version": "0.1.0",
+      "engines": {
+        "node": ">=20"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..4381a9d
--- /dev/null
+++ b/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "paywaz-samples",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Health-checked Paywaz sample integrations",
+  "engines": {
+    "node": ">=20"
+  },
+  "scripts": {
+    "lint": "npm run lint:payments && npm run lint:webhooks-express && npm run lint:webhooks-node",
+    "lint:payments": "node --check javascript/payments/create-payment.mjs && node --check javascript/payments/get-payment.mjs",
+    "lint:webhooks-express": "node --check javascript/webhooks-express/server.mjs && node --check javascript/webhooks-express/verify-signature.mjs",
+    "lint:webhooks-node": "node --check javascript/webhooks-node/server.mjs && node --check javascript/webhooks-node/verify-signature.mjs && node --check javascript/webhooks-node/sign-webhook.mjs && node --check javascript/webhooks-node/send-test-webhook.mjs",
+    "test": "npm run test:webhooks-node",
+    "test:webhooks-node": "npm --prefix javascript/webhooks-node test",
+    "build": "npm run lint",
+    "start": "node javascript/payments/create-payment.mjs"
+  }
+}