CCDV-F: Claude Certified Developer — Foundations

Deterministic output filtering evaluates each generated response against the defined prohibited categories before it is delivered to users, enabling matching content to be blocked consistently. System-prompt instructions may steer model behavior but are not a guaranteed enforcement control.

Each environment should use its own API key. Environment-specific credentials isolate compromise, revocation, auditing, permissions, and rotation, so exposure in development or staging does not grant access to production. Anthropic documentation also recommends creating a dedicated API key for direct API use and storing it securely.

Choose the approach based on whether the built-in tool can be extended to support the missing feature and whether that is preferable to the flexibility, implementation effort, and ongoing maintenance of a custom tool. This evaluates the relevant technical and lifecycle trade-off across both options.

A Skill packages instructions and optional workflow resources, including scripts, templates, and references, to guide repeatable work. An MCP server exposes live information and controlled actions through a standard client-server interface, including tools, resources, and prompts. Skills can complement MCP servers by defining how to use their capabilities for a workflow.

When a downstream system requires a particular JSON schema, the model must receive explicit instructions defining that schema and requiring output only in that format. Clear, specific output-format constraints improve compliance and prevent extra free text or incompatible structures.