P4-REQ-21-8-008

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Each interaction realization SHALL identify the required logging and exception-handling behavior.

Part 4, Section 21.8: Interaction Pattern Realization Requirements.

Interaction execution must expose sufficient operational information to make successful processing, warnings, degradation, failures, and recovery behavior reviewable.

Defining logging and exception-handling behavior ensures that important processing conditions are not silently hidden and supports later observation and evidence planning.

This requirement applies to:

• interaction realizations;
• logging behavior;
• exception handling;
• processing outcomes; and
• participating implementation artifacts.

Verification SHALL confirm that each interaction realization identifies its required logging and exception-handling behavior.

Verification activities should include review checks confirming that:

• required processing events are logged;
• failures are not silently suppressed;
• exceptions follow approved handling patterns;
• applicable warnings and recovery actions are recorded; and
• behavior conforms to the Developer Handbook.

This requirement connects Phase 0 interaction realizations to the logging and exception-handling conventions defined by Part 4.

Related requirement identifiers:

• P4-REQ-21-8-007
• P4-REQ-21-8-009
• P4-REQ-21-4-008

Related source section:

• 21.8 Interaction Pattern Realization Requirements

Draft