Agent Skills: Security Setup Coordinator

Paths: File paths (shared/, references/, ../ln-*) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root.

Security Setup Coordinator

L2 Domain Coordinator that orchestrates security scanning and configuration for project bootstrap.

Purpose & Scope

• Coordinate secret scanning (ln-761) and dependency vulnerability audit (ln-625)
• Aggregate findings from both workers into unified report
• Generate security infrastructure: SECURITY.md, pre-commit hooks, CI workflow
• Provide overall security score and risk assessment

When to Use

• During project bootstrap (invoked by ln-700-project-bootstrap)
• Manual security audit request
• CI/CD pipeline initialization

Workflow

Phase 1: Pre-flight Check

Step 1: Detect Project Type

• Identify primary ecosystem(s): Node.js, .NET, Python, Go, etc.
• Check for existing security configs (.gitleaks.toml, SECURITY.md)

Step 2: Check Tool Availability

• Verify gitleaks/trufflehog available for secret scanning
• Verify ecosystem-specific audit tools available
• Log warnings for missing tools (do not fail)

Step 3: Load Existing Configs

• If .gitleaks.toml exists: note for preservation
• If SECURITY.md exists: note for update (not overwrite)
• If .pre-commit-config.yaml exists: check for gitleaks hook

Phase 2: Delegate Scans

Step 1: Invoke ln-761 Secret Scanner

• Delegate via Task tool
• Receive: findings list, severity summary, remediation guidance

Step 2: Invoke ln-625 Dependencies Auditor (mode=vulnerabilities_only)

• Delegate via Task tool (can run parallel with Step 1)
• Pass parameter: mode=vulnerabilities_only
• Receive: vulnerability list, CVSS scores, fix recommendations

Phase 3: Aggregate Reports

Step 1: Combine Findings

• Merge findings from both workers
• Group by severity (Critical first)
• Calculate overall security score

Step 2: Risk Assessment

• Critical findings: flag for immediate attention
• High findings: recommend fix within 48h
• Medium/Low: add to backlog

Step 3: Build Summary

• Files scanned count
• Secrets found (by severity)
• Vulnerabilities found (by severity)
• Overall pass/warn/fail status

Phase 4: Generate Outputs

Step 1: Create/Update SECURITY.md

• Use template from references/security_md_template.md
• If exists: update, preserve custom sections
• If new: generate with placeholders

Step 2: Configure Pre-commit Hooks

• If .pre-commit-config.yaml missing: create from template
• If exists without gitleaks: recommend adding
• Template: references/precommit_config_template.yaml

Step 3: Generate CI Workflow

• If .github/workflows/security.yml missing: create from template
• Template: references/ci_workflow_template.yaml
• Include ecosystem-specific audit jobs

Step 4: Update .gitignore

• Ensure secret-related patterns present:
  • .env, .env.*, !.env.example
  • *.pem, *.key
• Preserve existing entries

Delegation Pattern

CRITICAL: All delegations use Task tool with subagent_type: "general-purpose" for context isolation.

| Worker | Parallel | Purpose | |--------|----------|---------| | ln-761-secret-scanner | Yes | Hardcoded secret detection | | ln-625-dependencies-auditor | Yes | Vulnerability scanning (mode=vulnerabilities_only) |

Prompt template:

Task(description: "Secret scanning via ln-761",
     prompt: "Execute ln-761-secret-scanner. Read skill from ln-761-secret-scanner/SKILL.md. Project: {projectPath}",
     subagent_type: "general-purpose")

Task(description: "Dependency vulnerability scan via ln-625",
     prompt: "Execute ln-625-dependencies-auditor with mode=vulnerabilities_only. Read skill from ln-625-dependencies-auditor/SKILL.md. Project: {projectPath}. Mode: vulnerabilities_only (only CVE scan, skip outdated/unused checks).",
     subagent_type: "general-purpose")

Pattern: Both workers can execute in parallel via Task tool, then aggregate results.

Anti-Patterns:

• ❌ Direct Skill tool invocation without Task wrapper
• ❌ Any execution bypassing subagent context isolation
• ❌ Calling ln-625 without mode parameter (would run full audit)

Definition of Done

• [ ] Both workers (ln-761, ln-625) invoked and completed
• [ ] Findings aggregated with severity classification
• [ ] SECURITY.md created/updated
• [ ] Pre-commit hook configured (or recommendation logged)
• [ ] CI workflow generated (or recommendation logged)
• [ ] .gitignore updated with secret patterns
• [ ] Summary report returned to parent orchestrator

Reference Files

| File | Purpose | |------|---------| | references/security_md_template.md | Template for SECURITY.md generation | | references/precommit_config_template.yaml | Pre-commit hooks configuration | | references/ci_workflow_template.yaml | GitHub Actions security workflow |

Critical Rules

• Always pass mode=vulnerabilities_only to ln-625 — full audit mode is not appropriate for bootstrap context
• Preserve existing configs — if .gitleaks.toml, SECURITY.md, or .pre-commit-config.yaml exist, update rather than overwrite
• Use Task tool with subagent_type: "general-purpose" for all worker delegations (context isolation)
• Never fail on missing tools — log warnings for unavailable scanners, continue with available ones
• Critical findings block completion — flag for immediate attention before returning to parent

Version: 3.0.0 Last Updated: 2026-02-05