Single-Session Security Audit

Execution Mode Selection

Condition	Mode	Time
Task tool available + no context pressure	Parallel	~15 min
Task tool unavailable	Sequential	~60 min
Context running low (<20% remaining)	Sequential	~60 min
User requests sequential	Sequential	~60 min

---

Section A: Parallel Architecture (4 Agents)

When to use: Task tool available, sufficient context budget, no S0/S1 in scope

Agent 1: vulnerability-scanner

Focus Areas:

• Authentication & Authorization
• Input Validation & Injection Prevention
• OWASP Top 10 Coverage

Files:

• app/api/**/*.ts

  (API routes)

• middleware.ts

• lib/auth*.ts

• Form handlers, input components

Agent 2: supply-chain-auditor

Focus Areas:

• Dependency Security & Supply Chain
• Package vulnerabilities (npm audit)
• License compliance
• Unpinned versions, risky postinstall scripts

Files:

• package.json

  ,

  package-lock.json

• All import statements

• functions/package.json

Agent 3: framework-security-auditor

Focus Areas:

• Firebase/Firestore Security (rules, Cloud Functions)
• Next.js/Framework-Specific Security
• Hosting & Headers Security
• Server/client boundary leaks

Files:

• firestore.rules

  ,

  storage.rules

• firebase.json

• functions/src/**/*.ts

• next.config.mjs

Agent 4: ai-code-security-auditor

Focus Areas:

• AI-Generated Code & Agent Security
• Crypto & Randomness
• File Handling Security
• Product/UX Security Risks

Files:

• .claude/

  configs
• Files with

  crypto

  ,

  random

  ,

  hash

  patterns
• File upload handlers
• Admin UI components

Parallel Execution Command

Invoke all 4 agents in a SINGLE Task message:

Task 1: vulnerability-scanner agent - audit auth, input validation, OWASP Task
2: supply-chain-auditor agent - audit dependencies, npm packages Task 3:
framework-security-auditor agent - audit Firebase, Next.js, headers Task 4:
ai-code-security-auditor agent - audit AI patterns, crypto, files

Coordination Rules

1. Each agent writes findings to separate JSONL section
2. S0/S1 findings trigger immediate notification
3. File conflicts resolved by framework-security-auditor (highest authority)
4. All agents respect rate-limiting and App Check patterns

---

Section B: Sequential Fallback (Single Agent)

When to use: Task tool unavailable, context limits, or user preference

Execution Order (priority-first):

1. AI Security Patterns (S0 potential) - 15 min
2. Auth & Authorization - 10 min
3. Input Validation - 10 min
4. Supply Chain (npm audit) - 5 min
5. Remaining categories - 20 min

Total: ~60 min (vs ~15 min parallel)

Checkpointing: After each category, write intermediate findings to file before continuing. This protects against context loss.

Checkpoint Format

{
  "started_at": "ISO timestamp",
  "categories_completed": ["Auth", "Input"],
  "current_category": "DataProtection",
  "findings_count": 24,
  "last_file_written": "stage-2-findings.jsonl"
}

Write Checkpoint After Each Category

• Update

  ${AUDIT_DIR}/checkpoint.json

• Append findings to

  .jsonl

  file (not overwrite)
• This enables recovery regardless of agent capability

---

Pre-Audit Validation

Step 0: Episodic Memory Search (Session #128)

Before running security audit, search for context from past security sessions:

// Search for past security audit findings
mcp__plugin_episodic -
  memory_episodic -
  memory__search({
    query: ["security audit", "S0", "vulnerability"],
    limit: 5,
  });

// Search for specific vulnerability patterns addressed before
mcp__plugin_episodic -
  memory_episodic -
  memory__search({
    query: ["OWASP", "injection", "auth bypass"],
    limit: 5,
  });

Why this matters:

• Compare against previous security findings (regression detection)
• Identify recurring vulnerabilities (may indicate architectural issue)
• Track which S0/S1 issues were resolved vs still open
• Prevent re-flagging known false positives

---

Step 1: Check Thresholds

Run

npm run review:check

and report results. Check for security-sensitive file changes.

• Display count of security-sensitive files changed
• If none: "⚠️ No security-sensitive changes detected. Proceed anyway?"
• Continue with audit regardless (user invoked intentionally)

Step 2: Gather Current Baselines

Collect these metrics by running commands:

# Dependency vulnerabilities (extract summary without truncating JSON)
npm audit --json 2>/dev/null | node -e '
try {
  const d = JSON.parse(require("fs").readFileSync(0,"utf8"));
  console.log(JSON.stringify(d.metadata?.vulnerabilities ?? d.vulnerabilities ?? {}, null, 2));
} catch (e) {
  console.log("{\"error\": \"Invalid JSON from npm audit\"}");
}
'

# Security lint warnings
npm run lint 2>&1 | grep -i "security" | head -10

# Pattern compliance (security patterns)
npm run patterns:check 2>&1

# Check for .env files (existence only - no permission/owner metadata needed)
ls .env* 2>/dev/null || echo "No .env files found"

Step 2b: Query SonarCloud Security (if MCP available)

If

mcp__sonarcloud__get_security_hotspots

is available:

• Query with

  status: "TO_REVIEW"

  to get unresolved security hotspots
• Note hotspot count and severity distribution

If

mcp__sonarcloud__get_issues

is available:

• Query with

  types: "VULNERABILITY"

  to get security-specific issues
• Cross-reference with npm audit findings for comprehensive coverage

This provides real-time security issue data from static analysis.

Step 3: Load False Positives Database

Read

docs/audits/FALSE_POSITIVES.jsonl

and filter findings matching:

• Category:

  security

• Expired entries (skip if

  expires

  date passed)

Note patterns to exclude from final findings.

Step 4: Check Template Currency

Read

docs/templates/MULTI_AI_SECURITY_AUDIT_PLAN_TEMPLATE.md

and verify:

• FIREBASE_CHANGE_POLICY.md reference is valid
• Security-sensitive file list is current
• OWASP categories are complete
• Firestore rules path is correct

If outdated, note discrepancies but proceed with current values.

---

Audit Execution

Focus Areas (12 Categories):

1. Authentication & Authorization (auth checks, role validation, IDOR, privilege escalation)

2. Input Validation & Injection Prevention:

   • SQL/NoSQL injection, command injection
   • Template injection, eval/Function(), new Function()
   • Unsafe deserialization, prototype pollution

3. Data Protection (encryption, PII handling, secrets, overly verbose errors)

4. Firebase/Firestore Security (rules, Cloud Functions, rate limiting, replay protection)

5. Dependency Security & Supply Chain:

   • npm audit, outdated packages
   • Unpinned versions, risky postinstall scripts
   • Unused dependencies with known vulnerabilities

6. OWASP Top 10 Coverage

7. Hosting & Headers Security:

   • CSP, HSTS, X-Frame-Options, X-Content-Type-Options
   • COOP, COEP, Referrer-Policy, Permissions-Policy

8. Next.js/Framework-Specific:

   • Server/client boundary leaks (secrets in client bundles)
   • API route / middleware auth gates
   • Static export vs server rendering assumptions

9. File Handling Security:

   • Insecure file upload, path traversal
   • MIME type validation, file size limits

10. Crypto & Randomness:

    • Weak randomness (Math.random for security), broken hashing
    • Unsafe JWT/session handling, homegrown crypto

11. Product/UX Security Risks:

    • Misleading "security UI" (toggles without server enforcement)
    • Dangerous defaults not clearly communicated
    • Admin-only flows accessible via client routes without backend checks

12. AI-Generated Code & Agent Security:

    • Prompt-injection surfaces in scripts/configs
    • Agent config files with unsafe patterns
    • Suspicious strings/comments that could manipulate AI agents

13. AI Security Patterns (AI-Codebase Specific):

    • Prompt Injection Surfaces:

      .claude/

      configs, agent prompts, LLM integrations with user input (S0)
    • Hallucinated Security APIs: Security functions that don't exist or have wrong signatures (S1)
    • AI-Suggested Insecure Defaults: Default

      any

      types,

      *

      CORS, overly permissive rules (S1)
    • Inconsistent Auth Patterns: Different auth approaches across AI sessions (S2)
    • Over-Confident Comments: "This is secure because..." without actual security (S2)
    • AI-Generated Crypto: Homegrown crypto patterns AI might generate (S0)

For each category:

1. Search relevant files using Grep/Glob
2. Identify specific vulnerabilities with file:line references
3. Classify severity: S0 (Critical) | S1 (High) | S2 (Medium) | S3 (Low)
4. Classify OWASP category if applicable
5. Estimate effort: E0 (trivial) | E1 (hours) | E2 (day) | E3 (major)
6. Assign confidence level (see Evidence Requirements below)

Security-Sensitive Files to Check:

• firestore.rules

  ,

  storage.rules

• functions/src/**/*.ts

• lib/firebase*.ts

  ,

  lib/auth*.ts

• middleware.ts

  ,

  next.config.mjs

• firebase.json

  (hosting headers, rewrites)

• .env*

  files (environment variables)

• package.json

  ,

  package-lock.json

  (supply chain)

• .claude/

  configs (agent security)
• Any file with "security", "auth", "token", "secret", "credential" in name

Additional Checks for Vibe-Coded Apps:

• Search for

  eval(

  ,

  new Function(

  ,

  Function(

  - dynamic code execution
• Search for

  dangerouslySetInnerHTML

  - XSS vectors
• Search for

  NEXT_PUBLIC_

  env vars - ensure no secrets leaked
• Search for

  process.env

  in client components - boundary leaks
• Search for

  postinstall

  ,

  preinstall

  in package.json - supply chain
• Search for suspicious patterns in

  .claude/

  that could be prompt injection

Scope:

• Include:

  app/

  ,

  components/

  ,

  lib/

  ,

  functions/

  ,

  firestore.rules

  ,

  firebase.json

  ,

  .claude/

• Exclude:

  node_modules/

  ,

  .next/

  ,

  docs/

  ,

  tests/

---

Evidence Requirements (MANDATORY)

All findings MUST include:

1. File:Line Reference - Exact location (e.g.,

   lib/auth.ts:45

   )
2. Code Snippet - The actual vulnerable code (3-5 lines of context)
3. Verification Method - How you confirmed this is an issue (grep output, tool output)
4. Standard Reference - CWE number, OWASP category, or security best practice citation

Confidence Levels:

• HIGH (90%+): Confirmed by external tool (npm audit, ESLint security), verified file exists, code snippet matches
• MEDIUM (70-89%): Found via pattern search, file verified, but no tool confirmation
• LOW (<70%): Pattern match only, needs manual verification

S0/S1 findings require:

• HIGH or MEDIUM confidence (LOW confidence S0/S1 must be escalated)
• Dual-pass verification (re-read the code after initial finding)
• Cross-reference with npm audit, ESLint, or patterns:check output

---

Cross-Reference Validation

Before finalizing findings, cross-reference with:

1. npm audit output - Mark dependency findings as "TOOL_VALIDATED" if npm audit agrees
2. ESLint security warnings - Mark code findings as "TOOL_VALIDATED" if ESLint flagged same issue
3. patterns:check output - Mark pattern violations as "TOOL_VALIDATED" if patterns:check flagged
4. Prior audits - Check

   docs/audits/single-session/security/

   for duplicate findings

Findings without tool validation should note:

"cross_ref": "MANUAL_ONLY"

---

Dual-Pass Verification (S0/S1 Only)

For all S0 (Critical) and S1 (High) findings:

1. First Pass: Identify the issue, note file:line and initial evidence
2. Second Pass: Re-read the actual code in context
   • Verify the vulnerability is exploitable
   • Check for existing mitigations (validation, sanitization, auth checks)
   • Confirm file and line still exist
3. Decision: Mark as CONFIRMED or DOWNGRADE (with reason)

Document dual-pass result in finding:

"verified": "DUAL_PASS_CONFIRMED"

or

"verified": "DOWNGRADED_TO_S2"

---

Output Requirements

1. Markdown Summary (display to user):

## Security Audit - [DATE]

### Baselines

- npm audit: X vulnerabilities (Y critical, Z high)
- Security patterns: X violations
- Security-sensitive files: X changed since last audit

### Findings Summary

| Severity | Count | OWASP Category | Confidence  |
| -------- | ----- | -------------- | ----------- |
| S0       | X     | ...            | HIGH/MEDIUM |
| S1       | X     | ...            | HIGH/MEDIUM |
| S2       | X     | ...            | ...         |
| S3       | X     | ...            | ...         |

### Critical/High Findings (Immediate Action)

1. [file:line] - Description (S0/OWASP-A01) - DUAL_PASS_CONFIRMED
2. ...

### False Positives Filtered

- X findings excluded (matched FALSE_POSITIVES.jsonl patterns)

### Dependency Vulnerabilities

- ...

### Recommendations

- ...

2. JSONL Findings (save to file):

Create file:

docs/audits/single-session/security/audit-[YYYY-MM-DD].jsonl

CRITICAL - Use JSONL_SCHEMA_STANDARD.md format:

{
  "category": "security",
  "title": "Short specific title",
  "fingerprint": "security::path/to/file.ts::identifier",
  "severity": "S0|S1|S2|S3",
  "effort": "E0|E1|E2|E3",
  "confidence": 90,
  "files": ["path/to/file.ts:123"],
  "why_it_matters": "1-3 sentences explaining security impact",
  "suggested_fix": "Concrete remediation direction",
  "acceptance_tests": ["Array of verification steps"],
  "evidence": ["code snippet", "grep output", "tool output"],
  "owasp_category": "A01|A02|...|A10|N/A",
  "cvss_estimate": "LOW|MEDIUM|HIGH|CRITICAL"
}

For S0/S1 findings, ALSO include verification_steps:

{
  "verification_steps": {
    "first_pass": {
      "method": "grep|tool_output|file_read|code_search",
      "evidence_collected": ["initial evidence"]
    },
    "second_pass": {
      "method": "contextual_review|exploitation_test|manual_verification",
      "confirmed": true,
      "notes": "Confirmation notes"
    },
    "tool_confirmation": {
      "tool": "npm_audit|eslint|sonarcloud|patterns_check|NONE",
      "reference": "Tool output or NONE justification"
    }
  }
}

⚠️ REQUIRED FIELDS (per JSONL_SCHEMA_STANDARD.md):

• category

  - MUST be

  security

  (normalized)

• fingerprint

  - Format:

  <category>::<primary_file>::<identifier>

• files

  - Array with file paths (include line as

  file.ts:123

  )

• confidence

  - Number 0-100 (not string)

• acceptance_tests

  - Non-empty array of verification steps

3. Markdown Report (save to file):

Create file:

docs/audits/single-session/security/audit-[YYYY-MM-DD].md

Full markdown report with all findings, baselines, and remediation plan.

---

Post-Audit Validation

Before finalizing the audit:

1. Run Validation Script:

   node scripts/validate-audit.js docs/audits/single-session/security/audit-[YYYY-MM-DD].jsonl
   

2. Validation Checks:

   • All findings have required fields
   • No matches in FALSE_POSITIVES.jsonl (or documented override)
   • No duplicate findings
   • All S0/S1 have HIGH or MEDIUM confidence
   • All S0/S1 have DUAL_PASS_CONFIRMED or TOOL_VALIDATED

3. If validation fails:

   • Review flagged findings
   • Fix or document exceptions
   • Re-run validation

---

Post-Audit

1. Display summary to user
2. Confirm files saved to

   docs/audits/single-session/security/

3. Run

   node scripts/validate-audit.js

   on the JSONL file
4. Validate CANON schema (if audit updates CANON files):

   npm run validate:canon
   

   Ensure all CANON files pass validation before committing.
5. Update AUDIT_TRACKER.md - Add entry to "Security Audits" table:
   • Date: Today's date
   • Session: Current session number from SESSION_CONTEXT.md
   • Commits Covered: Number of commits since last security audit
   • Files Covered: Number of security-sensitive files analyzed
   • Findings: Total count (e.g., "1 S0, 2 S1, 3 S2")
   • Reset Threshold: YES (single-session audits reset that category's threshold)
6. TDMS Integration (MANDATORY) - Ingest findings to canonical debt store:

   node scripts/debt/intake-audit.js docs/audits/single-session/security/audit-[YYYY-MM-DD].jsonl --source "audit-security-[DATE]"
   

   This assigns DEBT-XXXX IDs and adds to

   docs/technical-debt/MASTER_DEBT.jsonl

   . See

   docs/technical-debt/PROCEDURE.md

   for the full TDMS workflow.
7. If S0/S1 findings: "⚠️ Critical security issues found. Recommend immediate remediation."
8. Ask: "Would you like me to fix any of these issues now?"

---

Threshold System

Category-Specific Thresholds

This audit resets the security category threshold in

docs/AUDIT_TRACKER.md

(single-session audits reset their own category; multi-AI audits reset all thresholds). Reset means the commit counter for this category starts counting from zero after this audit.

Security audit triggers (check AUDIT_TRACKER.md):

• ANY security-sensitive file modified, OR
• 20+ commits since last security audit

Multi-AI Escalation

After 3 single-session security audits, a full multi-AI Security Audit is recommended. Track this in AUDIT_TRACKER.md "Single audits completed" counter.

---

Adding New False Positives

If you encounter a pattern that should be excluded from future audits:

node scripts/add-false-positive.js \
  --pattern "regex-pattern" \
  --category "security" \
  --reason "Explanation of why this is not a security issue" \
  --source "AI_REVIEW_LEARNINGS_LOG.md#review-XXX"

---

Documentation References

Before running this audit, review:

TDMS Integration (Required)

• PROCEDURE.md - Full TDMS workflow
• MASTER_DEBT.jsonl - Canonical debt store
• Intake command:

  node scripts/debt/intake-audit.js <output.jsonl> --source "audit-security-<date>"

Documentation Standards (Required)

• JSONL_SCHEMA_STANDARD.md - Output format requirements and TDMS field mapping
• DOCUMENTATION_STANDARDS.md - 5-tier doc hierarchy
• CODE_PATTERNS.md - Anti-patterns to check

Security (Applicable)

• SECURITY_CHECKLIST.md - Pre-write validation
• GLOBAL_SECURITY_STANDARDS.md - Security requirements