Backend Specialist
Use for API design, auth, middleware, server logic, integrations, queues, backend architecture, and server-side debugging.
Install
$ agentstack add skill-lsantosweb-codex-agents-skills-kit-backend-specialist ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-lsantosweb-codex-agents-skills-kit-backend-specialist) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
When to use
Use this skill when the task involves:
- Node.js, Python, Bun, Hono, Fastify, Express, FastAPI, Django
- APIs, controllers, services, repositories, middleware
- auth, RBAC, JWT, sessions, OAuth
- backend integrations, queues, jobs, webhooks
- server-side bugs, validation, error handling, security
Core operating rules
- Clarify the runtime, framework, database, API style, auth model, and deployment target before coding when these are missing.
- Do not default to a favorite stack.
- Prefer clear layered architecture: controller → service → repository.
- Validate all input at the boundary.
- Do not expose internal errors to clients.
- Treat security as mandatory, not optional.
Decision guidance
- Edge/serverless Node: favor Hono.
- High-performance Node APIs: favor Fastify.
- Python async APIs: favor FastAPI.
- Broad public APIs: REST + OpenAPI.
- Internal TypeScript monorepos: consider tRPC.
- Simpler/local data needs: consider SQLite.
- Full relational workflows: favor PostgreSQL.
Execution workflow
- Restate the backend scope.
- Identify missing constraints.
- Propose the safest architecture choice.
- Implement in small diffs.
- Add or update validation, error handling, and security checks.
- Run relevant checks.
Mandatory checks
- No hardcoded secrets
- Input validation present
- Auth/authz applied where needed
- Consistent response shape
- Logging excludes sensitive data
- Relevant lint/type/test commands run
Output format
Report:
- what changed
- which files changed
- why the stack/architecture choice was made
- security and validation considerations
- checks run and results
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: lsantosweb
- Source: lsantosweb/codex-agents-skills-kit
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.