diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..298e5f2f
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,37 @@
+version: 2
+updates:
+  # Maintain GitHub Actions dependencies
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    commit-message:
+      prefix: "ci(deps)"
+
+  # Maintain Python dependencies for root package
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    commit-message:
+      prefix: "fix(deps)"
+
+  # Maintain npm dependencies for Mastra adapter
+  - package-ecosystem: "npm"
+    directory: "/adapters/mastra"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "fix(deps)"
+
+  # Maintain npm dependencies for Vercel AI adapter
+  - package-ecosystem: "npm"
+    directory: "/adapters/vercel-ai"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "fix(deps)"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..2a3c75be
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,44 @@
+name: "CodeQL Analysis"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: "0 6 * * 1"
+
+permissions:
+  contents: read
+  actions: read
+  security-events: write
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 360
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: python
+            build-mode: none
+          - language: javascript-typescript
+            build-mode: none
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/dependency-scan.yml b/.github/workflows/dependency-scan.yml
new file mode 100644
index 00000000..07710030
--- /dev/null
+++ b/.github/workflows/dependency-scan.yml
@@ -0,0 +1,34 @@
+name: Dependency Security Audit
+
+on:
+  push:
+    branches: [ "**" ]
+  pull_request:
+  schedule:
+    - cron: "0 4 * * 1"
+
+permissions:
+  contents: read
+
+jobs:
+  audit:
+    name: Scan Python Dependencies
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install pip-audit and dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install pip-audit .
+
+      - name: Run pip-audit vulnerability scan
+        run: |
+          pip-audit
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
new file mode 100644
index 00000000..1cc8db4d
--- /dev/null
+++ b/.github/workflows/scorecard.yml
@@ -0,0 +1,46 @@
+name: OpenSSF Scorecard
+
+on:
+  branch_protection_rule:
+  schedule:
+    - cron: "30 1 * * 6"
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      id-token: write
+      contents: read
+      actions: read
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@v2.4.0
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@v4
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: results.sarif
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 00000000..0db29274
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,66 @@
+# Security Policy
+
+Prismor is a security utility for AI coding agents. We treat vulnerabilities in this repository and our runtime components with the highest priority.
+
+---
+
+## Supported Versions
+
+Only the latest active minor release line receives security updates and vulnerability patches.
+
+| Version | Supported | Notes                                     |
+| ------- | --------- | ----------------------------------------- |
+| 1.x     | Yes       | Actively supported with security updates. |
+| < 1.0   | No        | Legacy / pre-release — no longer patched. |
+
+We recommend users and downstream integrators always update to the latest release of `prismor` from PyPI or GitHub.
+
+---
+
+## Reporting a Vulnerability
+
+If you discover a security vulnerability in Prismor, please **do not open a public GitHub issue or discuss it publicly**. Instead, report it through one of the private channels below:
+
+### 1. GitHub Private Vulnerability Reporting (Preferred)
+Submit a report privately via GitHub:
+**[Report a vulnerability](https://github.com/PrismorSec/prismor/security/advisories/new)**
+
+### 2. Email
+Send an encrypted or private email to:
+**security@prismor.dev**
+
+Please include:
+- A clear description of the vulnerability and its potential impact.
+- Step-by-step reproduction instructions or a minimal Proof of Concept (PoC).
+- The affected version(s), platform/OS, and agent environment (e.g., Claude Code, Cursor, Gemini CLI).
+- Any proposed remediation or patch, if available.
+
+---
+
+## Our Response Process & SLA
+
+When you submit a vulnerability report:
+
+1. **Acknowledgment**: We will acknowledge receipt of your report within **48 hours**.
+2. **Triage & Assessment**: We will assess the severity and impact within **5 business days** and keep you updated on progress.
+3. **Fix & Verification**: A patch will be developed and verified in a private security advisory branch.
+4. **Coordinated Disclosure**: We will coordinate with you on the release date and credit your contribution in the security advisory and release notes.
+
+We kindly ask that you maintain responsible disclosure and give us reasonable time to release a patch before making any information public.
+
+---
+
+## Scope & Out-of-Scope
+
+### In Scope
+- Vulnerabilities that allow bypassing runtime policy enforcement without authorization.
+- Secret leaks or failures in the secret cloaking prevention layer (`@@SECRET:...@@`).
+- Flaws in memory guard integrity or prompt-injection defense mechanisms.
+- Remote Code Execution (RCE) or Privilege Escalation vulnerabilities in runtime hooks and adapters.
+
+### Out of Scope
+- Attacks requiring physical access to an unlocked, root-compromised machine.
+- Social engineering attacks against project maintainers.
+- Denial of Service attacks against public demonstration endpoints without functional exploitability.
+
+Thank you for helping keep Prismor and the AI agent ecosystem safe!