diff --git a/.github/semgrep/llm-owasp.yaml b/.github/semgrep/llm-owasp.yaml
new file mode 100644
index 0000000..12672ad
--- /dev/null
+++ b/.github/semgrep/llm-owasp.yaml
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+rules:
+  # ─────────────────────────────────────────────────────────────
+  # OWASP LLM Top 10 — Custom Semgrep Rules
+  # Scope: Claude Code plugin that orchestrates LLM calls,
+  #        renders LaTeX, and serves a React web resume.
+  # ─────────────────────────────────────────────────────────────
+
+  # LLM02 — Insecure Output Handling
+  # Risk: LLM-generated text rendered as raw HTML enables stored XSS.
+
+  - id: llm02-innerhtml-assignment
+    pattern: $EL.innerHTML = $VAL
+    message: >
+      LLM02 (Insecure Output Handling): Direct innerHTML assignment bypasses
+      React's sanitization. If $VAL ever holds AI-generated content, this enables
+      stored XSS. Use a sanitization library (e.g. DOMPurify) or render via React
+      JSX instead.
+    languages: [typescript, javascript]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM02
+      cwe: CWE-79
+
+  - id: llm02-document-write
+    pattern: document.write($X)
+    message: >
+      LLM02 (Insecure Output Handling): document.write() renders raw HTML with
+      no escaping. Do not use with AI-generated or user-supplied content.
+    languages: [typescript, javascript]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM02
+      cwe: CWE-79
+
+  - id: llm02-dangerous-set-inner-html
+    pattern: dangerouslySetInnerHTML={{ __html: $VAL }}
+    message: >
+      LLM02 (Insecure Output Handling): dangerouslySetInnerHTML renders raw HTML,
+      bypassing React's XSS protection. Sanitize AI-generated content with
+      DOMPurify before passing it here, or restructure to avoid raw HTML rendering.
+    languages: [typescript, javascript]
+    severity: WARNING
+    metadata:
+      owasp-llm: LLM02
+      cwe: CWE-79
+
+  # LLM08 — Excessive Agency
+  # Risk: eval() / new Function() allow LLM-generated strings to execute as code.
+
+  - id: llm08-eval
+    pattern: eval($X)
+    message: >
+      LLM08 (Excessive Agency): eval() executes arbitrary JavaScript. Never pass
+      AI-generated or user-controlled content to eval(). Refactor to use a safe
+      alternative (e.g. JSON.parse for data, explicit logic for control flow).
+    languages: [typescript, javascript]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM08
+      cwe: CWE-95
+
+  - id: llm08-new-function
+    pattern: new Function($X)
+    message: >
+      LLM08 (Excessive Agency): new Function() is equivalent to eval() — it
+      compiles and runs arbitrary JavaScript. Do not construct Function objects
+      from AI-generated content.
+    languages: [typescript, javascript]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM08
+      cwe: CWE-95
+
+  - id: llm08-child-process-exec-dynamic
+    patterns:
+      - pattern: |
+          require('child_process').exec($CMD, ...)
+      - pattern-not: |
+          require('child_process').exec("...", ...)
+    message: >
+      LLM08 (Excessive Agency): child_process.exec() with a dynamic command
+      string can enable OS command injection if $CMD contains AI-generated or
+      user-controlled content. Use execFile() with a fixed binary and argument
+      array instead.
+    languages: [typescript, javascript]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM08
+      cwe: CWE-78
+
+  # LLM06 — Sensitive Information Disclosure
+  # Risk: API keys or credentials hardcoded in tracked source files.
+
+  - id: llm06-anthropic-api-key
+    pattern-regex: 'sk-ant-[A-Za-z0-9_\-]{20,}'
+    message: >
+      LLM06 (Sensitive Information Disclosure): Anthropic API key detected in
+      source. Revoke and rotate immediately; store secrets in environment
+      variables or a secrets manager, never in code.
+    languages: [generic]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM06
+      cwe: CWE-798
+
+  - id: llm06-github-pat
+    pattern-regex: 'ghp_[A-Za-z0-9]{36}'
+    message: >
+      LLM06 (Sensitive Information Disclosure): GitHub Personal Access Token
+      detected. Revoke and rotate immediately.
+    languages: [generic]
+    severity: ERROR
+    metadata:
+      owasp-llm: LLM06
+      cwe: CWE-798
+
+  - id: llm06-openai-api-key
+    pattern-regex: 'sk-[A-Za-z0-9]{48}'
+    message: >
+      LLM06 (Sensitive Information Disclosure): Potential OpenAI API key detected.
+      Verify and rotate if confirmed.
+    languages: [generic]
+    severity: WARNING
+    metadata:
+      owasp-llm: LLM06
+      cwe: CWE-798
+
+  # LLM01 — Prompt Injection (detectable surface: template literals in TS/JS)
+  # Risk: user-controlled strings interpolated directly into prompt strings sent
+  # to the Claude API without any demarcation or sanitization.
+  # Note: most prompt construction in this repo is in Markdown skill files
+  # (not statically analyzable); this rule catches TypeScript prompt builders.
+
+  - id: llm01-prompt-string-concat
+    patterns:
+      - pattern: $PROMPT + $USER_INPUT
+      - metavariable-regex:
+          metavariable: $USER_INPUT
+          regex: '.*(user|input|content|query|message|prompt|text|data).*'
+    message: >
+      LLM01 (Prompt Injection): String concatenation may inject user-controlled
+      content directly into a prompt. Wrap untrusted content in explicit
+      delimiters (e.g. XML tags: <user_input>...</user_input>) to prevent
+      an adversary from overriding system instructions.
+    languages: [typescript, javascript]
+    severity: WARNING
+    metadata:
+      owasp-llm: LLM01
+      cwe: CWE-77
+
+  # LLM05 — Supply Chain
+  # Risk: install lifecycle scripts in package.json execute code during npm install.
+
+  - id: llm05-npm-preinstall-script
+    pattern-regex: '"preinstall"\s*:\s*"[^"]+'
+    message: >
+      LLM05 (Supply Chain): A preinstall script runs automatically during
+      npm install. Verify this is intentional and audited; supply-chain
+      attacks often abuse lifecycle hooks.
+    languages: [generic]
+    paths:
+      include:
+        - "**/package.json"
+    severity: WARNING
+    metadata:
+      owasp-llm: LLM05
+      cwe: CWE-494
+
+  - id: llm05-npm-postinstall-script
+    pattern-regex: '"postinstall"\s*:\s*"[^"]+'
+    message: >
+      LLM05 (Supply Chain): A postinstall script runs automatically after
+      npm install. Audit this script to ensure it has not been tampered with.
+    languages: [generic]
+    paths:
+      include:
+        - "**/package.json"
+    severity: WARNING
+    metadata:
+      owasp-llm: LLM05
+      cwe: CWE-494
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
new file mode 100644
index 0000000..8e7823b
--- /dev/null
+++ b/.github/workflows/security.yml
@@ -0,0 +1,181 @@
+name: Security Pipeline
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  security-events: write   # upload SARIF to GitHub Security tab
+  pull-requests: read
+
+jobs:
+  # ──────────────────────────────────────────────────────────────
+  # 1. Secret & credential scanning
+  # ──────────────────────────────────────────────────────────────
+  secret-scan:
+    name: Secret Scanning (Gitleaks)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0   # full history so gitleaks can scan all commits in the PR
+      - uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # GITLEAKS_LICENSE is only required for GitHub org-level scanning.
+          # For a public personal repo this can be left unset.
+          GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE }}
+
+  # ──────────────────────────────────────────────────────────────
+  # 2. npm dependency audit (web-builder)
+  # ──────────────────────────────────────────────────────────────
+  npm-audit:
+    name: npm Dependency Audit
+    runs-on: ubuntu-latest
+    # Skip gracefully if the web-builder hasn't been committed yet
+    if: ${{ hashFiles('resumes/web-builder/package.json') != '' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: npm
+          cache-dependency-path: resumes/web-builder/package-lock.json
+      - name: Install dependencies
+        working-directory: resumes/web-builder
+        run: npm ci
+      - name: Audit for vulnerabilities (moderate+)
+        working-directory: resumes/web-builder
+        # --audit-level=moderate fails on moderate, high, and critical issues
+        run: npm audit --audit-level=moderate
+
+  # ──────────────────────────────────────────────────────────────
+  # 3. SAST — TypeScript/React + OWASP LLM Top 10 (Semgrep)
+  # ──────────────────────────────────────────────────────────────
+  semgrep:
+    name: "SAST: Semgrep (TypeScript + OWASP LLM Top 10)"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install Semgrep
+        run: pip install semgrep
+
+      # --- TypeScript / React (standard auto rules) ---
+      - name: Semgrep – TypeScript/React auto rules
+        if: ${{ hashFiles('resumes/web-builder/src') != '' }}
+        # Exit 0 so we always upload SARIF; pipeline gating is done via SARIF review
+        run: |
+          semgrep scan \
+            --config auto \
+            --include "*.ts" --include "*.tsx" --include "*.js" \
+            --sarif --output semgrep-ts.sarif \
+            resumes/web-builder/src
+        continue-on-error: true
+
+      - name: Upload TypeScript SARIF
+        if: always() && hashFiles('semgrep-ts.sarif') != ''
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: semgrep-ts.sarif
+          category: semgrep-typescript
+
+      # --- OWASP LLM Top 10 custom rules (whole repo) ---
+      - name: Semgrep – OWASP LLM Top 10 custom rules
+        run: |
+          semgrep scan \
+            --config .github/semgrep/llm-owasp.yaml \
+            --sarif --output semgrep-llm.sarif \
+            .
+        # Fail the PR check when ERROR-severity LLM findings are detected
+        # (WARNING-severity still uploads but doesn't fail the build)
+
+      - name: Upload LLM OWASP SARIF
+        if: always() && hashFiles('semgrep-llm.sarif') != ''
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: semgrep-llm.sarif
+          category: semgrep-llm-owasp
+
+  # ──────────────────────────────────────────────────────────────
+  # 4. LaTeX injection check
+  #    \write18 / --shell-escape enables arbitrary OS command execution
+  #    from within a .tex file — a real risk if resume content is
+  #    ever rendered from untrusted input.
+  # ──────────────────────────────────────────────────────────────
+  latex-safety:
+    name: LaTeX Injection Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Scan for shell-escape primitives
+        run: |
+          echo "Checking LaTeX templates for dangerous commands..."
+          FAIL=0
+
+          # \write18{<cmd>} and \immediate\write18{<cmd>} execute arbitrary shell commands
+          if grep -rn --include="*.tex" -E '\\write18|\\immediate\\write18' resumes/templates/; then
+            echo "::error file=resumes/templates::Dangerous LaTeX \\write18 found — enables arbitrary shell execution during compilation"
+            FAIL=1
+          fi
+
+          # latexmkrc or texmf.cnf with shell_escape = t enables the same
+          if find . \( -name "*.latexmkrc" -o -name "texmf.cnf" \) \
+                -not -path "./.git/*" \
+              | xargs grep -l "shell_escape\s*=\s*t\|openout_any\s*=\s*a" 2>/dev/null; then
+            echo "::error::LaTeX configuration enables shell escape or unrestricted output — dangerous in a build pipeline"
+            FAIL=1
+          fi
+
+          # Dynamic \input / \include paths (warning only — valid in templates but worth auditing)
+          if grep -rn --include="*.tex" -E '\\(input|include)\{\\|\\(input|include)\{[^}]*\$' resumes/templates/; then
+            echo "::warning::Dynamic \\input/\\include path found — verify it cannot be controlled by user-supplied content"
+          fi
+
+          [ $FAIL -eq 0 ] && echo "LaTeX safety check passed."
+          exit $FAIL
+
+  # ──────────────────────────────────────────────────────────────
+  # 5. Personal data leak check
+  #    PERSONAL_PROFILE.md and MISSING_INFORMATION.md are gitignored
+  #    on purpose. This job fails if either file (or any .backup.)
+  #    is accidentally tracked, preventing personal data from being
+  #    pushed to the public repository.
+  # ──────────────────────────────────────────────────────────────
+  pii-check:
+    name: Personal Data Leak Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Ensure personal files are not tracked
+        run: |
+          echo "Verifying personal/private files are not committed..."
+          FAIL=0
+
+          # These files must never be tracked
+          FORBIDDEN_PATTERNS=(
+            "PERSONAL_PROFILE\\.md"
+            "MISSING_INFORMATION\\.md"
+            "\\.backup\\."
+            "resumes/compiled/"
+            "resumes/customized/"
+          )
+
+          for pattern in "${FORBIDDEN_PATTERNS[@]}"; do
+            matches=$(git ls-files | grep -E "$pattern" | grep -v "\.example\." || true)
+            if [ -n "$matches" ]; then
+              echo "::error::Private file tracked in git: $matches"
+              echo "  These files must remain gitignored — they contain personal data."
+              FAIL=1
+            fi
+          done
+
+          [ $FAIL -eq 0 ] && echo "Personal data check passed — no private files tracked."
+          exit $FAIL