Florianbuetow Claude Code Start

AppSec Start -- Project Assessment

The entry point for any codebase. Detects what the project is, what data it handles, what scanners are available, and recommends exactly which /appsec:* tools are relevant, in what order, and why.

This skill runs entirely in the main agent context. It does NOT dispatch subagents. It produces a recommendation, not findings.

Supported Flags

This skill accepts a subset of cross-cutting flags. Read ../../shared/schemas/flags.md for the full specification.

Workflow

Execute all 6 steps sequentially in the main agent context. Use Glob, Grep, Read, and Bash tools to gather evidence. Do NOT guess -- only report what you find.

Step 1: Detect Tech Stack

Read project manifests to determine languages, frameworks, databases, and infrastructure. Check for each of these files using Glob:

Read each found manifest to extract framework names, database drivers, and notable dependencies. Build a concise stack summary.

Step 2: Detect Data Sensitivity

Scan the codebase for patterns indicating sensitive data handling. Use Grep with these patterns:

PII indicators:

• User model fields: email, phone, address, ssn, date_of_birth, social_security, national_id, passport
• GDPR patterns: consent, gdpr, data_subject, right_to_forget, data_protection

Financial indicators:

• Payment integrations: stripe, paypal, braintree, adyen, square
• Card patterns: card_number, cvv, credit_card, payment_method
• Transaction models: transaction, invoice, billing, subscription

Health data indicators:

• HIPAA terms: hipaa, phi, protected_health, medical_record, diagnosis, patient

Auth mechanism indicators:

• JWT: jsonwebtoken, jwt, jose
• OAuth: oauth, passport, openid
• Session: express-session, cookie-session, session_store
• Password storage: bcrypt, argon2, scrypt, pbkdf2

Classify data sensitivity as: None detected, PII, Financial, Health/PHI, or combinations.

Step 3: Detect Architecture Patterns

Determine the application type by scanning for these indicators:

Step 4: Detect Installed Scanners

Check PATH for known scanner binaries using Bash which commands. Run these checks in parallel:

which semgrep
which bandit
which gosec
which brakeman
which cargo-audit
which gitleaks
which trufflehog
which trivy
which osv-scanner
which checkov
which tfsec
which kics
which npm    (for npm audit)
which pip-audit

Read ../../shared/schemas/scanners.md for the full scanner registry and detection patterns.

Mark each as detected or not. For language-specific scanners, only report relevance if the language is in the detected stack.

Step 5: Check Existing Security Configs

Scan for security configurations already in place:

Note what is present and what is missing. This informs recommendations.

Step 6: Output Tailored Recommendation

Based on all detected signals, produce a prioritized list of /appsec:* tools to run, with rationale for each.

Priority rules:

1. /appsec:secrets --scope full is ALWAYS priority 1. Committed secrets are the most common and most damaging solo dev mistake.
2. Tools matching detected data sensitivity rank higher (financial data detected -> prioritize business-logic, race-conditions).
3. Tools matching detected architecture rank higher (GraphQL detected -> include graphql).
4. Tools with no relevant attack surface in this project go to the SKIP list.
5. Include the "why" for each recommendation -- reference specific files or patterns found.

Output Format

Text Format (default)

=====================================================
          APPSEC START -- Project Assessment
=====================================================

PROJECT: <project name from package.json or directory>
STACK: <languages, frameworks, databases, infra>
DATA: <data sensitivity classifications>
SCANNERS: <scanner> Y/N  <scanner> Y/N  ...

RECOMMENDED TOOLS (priority order):

  1. /appsec:secrets --scope full
     WHY: <rationale referencing specific findings>

  2. /appsec:<tool> --scope <recommended scope>
     WHY: <rationale referencing specific findings>

  ...

SKIP (not relevant for this project):
  - /appsec:<tool> (<reason>)
  - ...

EXISTING SECURITY:
  - <config found> -- <status>
  - ...

QUICK START:
  /appsec:run                    # Run top priorities automatically
  /appsec:run --depth deep       # Thorough analysis
  /appsec:run --depth expert     # + Red team simulation
  /appsec:full-audit             # Everything, with dated report

=====================================================

JSON Format

{
  "project": "<name>",
  "stack": { "languages": [], "frameworks": [], "databases": [], "infra": [] },
  "data_sensitivity": [],
  "architecture": [],
  "scanners": { "<name>": true|false },
  "existing_security": { "<config>": true|false },
  "recommended_tools": [
    { "rank": 1, "tool": "secrets", "scope": "full", "rationale": "..." }
  ],
  "skip": [
    { "tool": "graphql", "reason": "No GraphQL schema found" }
  ]
}

Caching

After assessment, write the results to .appsec/start-assessment.json so that /appsec:run can reuse the detection results without re-scanning. Include a timestamp so stale results can be detected (older than 24 hours or if package.json / manifest mtime has changed).

Follow-Up Prompt

After presenting the assessment, suggest:

Ready to scan? Run one of:
  /appsec:run                    Run recommended tools automatically
  /appsec:<top-priority-tool>    Start with the highest priority
  /appsec:full-audit             Exhaustive audit with dated report

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