GoldenWing-360

Baseline-harden a Debian or Ubuntu VPS in roughly thirty minutes. Covers SSH key-only authentication, UFW firewall, fail2ban with web-app jails, unattended security upgrades, kernel sysctls, journalctl retention, and sudo policy. Invoke when provisioning a new VPS, inheriting one without documented hardening, or before exposing a service to the public internet.

Cover Germany, Austria, and Switzerland compliance requirements that have security implications. Covers Impressum content per TMG/MStV/ECG, Datenschutzerklärung per DSGVO/TTDSG/DSG, AGB and Widerrufsbelehrung, AVV/DPA for sub-processors, technical-organizational measures (TOMs), and cookie consent that satisfies all three jurisdictions. Invoke when launching a DACH-facing site, adding third-party

Secure NATS, RabbitMQ, Kafka, and similar message buses against misconfiguration and cross-tenant leakage. Covers account or vhost isolation, deny-default subject and topic permissions, producer and consumer authentication, replay protection, consumer-side idempotency, and encryption in transit and at rest. Invoke when introducing a bus, adding multi-tenancy, or after a cross-tenant message-leakag

Configure email authentication so legitimate mail lands and spoofed mail is blocked. Covers SPF, DKIM, DMARC (with the p=none → p=quarantine → p=reject migration path), MTA-STS, TLS-RPT, ARC, and BIMI. Invoke when launching a new sending domain, when domains are being spoofed, or when transactional email is landing in spam.

Audit and defend against malicious dependencies in npm, pnpm, PyPI, and similar ecosystems. Covers lockfile hygiene, the limits of npm audit, behavior-level scanning with socket.dev, postinstall script review, typosquat and slopsquat detection, and minimum-permission CI runs. Invoke when adding a new dependency, after a supply-chain incident, or as periodic audit.

Apply operational controls to applications built on the Anthropic API or similar LLM SDKs. Maps the OWASP LLM Top 10 to practical controls, plus rate limiting, cost caps, PII scrubbing, audit logging, model-version pinning, and an AI-incident response playbook. Invoke when shipping an LLM feature to production, when handling an abuse complaint, or after a model-provider advisory.

Design logging that supports investigations without becoming a privacy liability. Covers what to log and what never to log (PII, secrets), structured logging, retention tiers, centralization choices, alert routing, and the operational-versus-access-versus-audit log split. Invoke when starting a new service, when investigation revealed missing log fields, or when log volume is becoming expensive.

Find Next.js-specific security issues across App Router, Pages Router, and Server Actions. Covers the middleware-bypass class, NEXT_PUBLIC environment leakage, RSC over-fetch, CSP for App Router, open redirects, and next/image SSRF via permissive remotePatterns. Invoke when reviewing a Next.js app before launch, after a major version upgrade, or when adding authenticated routes.

Audit Model Context Protocol server configurations and apply least-privilege scoping. Covers MCP inventory, capability risk-tiering, secret detection in configuration, malicious or compromised package indicators, and the lifecycle from install through rotation to revocation. Invoke before granting an MCP write access to production, after an MCP security advisory, or as periodic audit.

Design backends that survive redeploys, server reboots, and modest scaling. Covers stateless application servers, state placement (object storage, managed databases, Redis), immutable deploy artifacts, health checks, graceful shutdown, database migrations that don't lock the world, and the twelve-factor baseline. Invoke when designing a new backend, when uploads disappear after a redeploy, or when