Chaining

• When your workflow should allow inputs to proceed through several sequential steps, but only if they meet specific criteria at defined checkpoints (gates).
• For early validation or sanity checks, where you want to filter out invalid, undesired, or low-quality cases before investing additional resources in deeper processing.
• To implement "fail-fast" behavior, stopping the process as soon as a key requirement is not satisfied (quality gating or exception handling).
• When controlled access to further workflow steps is necessary, for cost, quality, or security reasons.
• Whenever you want to provide clear, divergent outcomes for pass/fail branches early in a process.

Example

• The prompt reads a new job application PDF.
• Step 1: Extract applicant data (Prompt 1)—parse experience and key skills from the application.
• Step 2: Gate—check if candidate meets minimum years of experience and must-have skills (Prompt 2).
• If 'fail', generate a polite rejection and exit the workflow immediately.
• If 'pass', continue.
• Step 3: For passing cases, run deeper review (Prompt 3)—evaluate project history, score overall fit.
• Step 4: Optionally, a final expert/HR summary (Prompt 4)—produce an actionable note for HR or next decision-maker.
• Output: Passing applications proceed with a complete evaluation and summary; failing applications are notified quickly and do not consume further resources.