CCAR-F Exact Mechanics Review

Use this as a dated lookup drill after you understand the architecture. It is not a substitute for building the workflows.

Guide: Claude Certified Architect - Foundations, version 1.0 Guide effective: July 2026 Verified: 2026-08-09

The public CCAR-F guide tests durable judgment and exact operating mechanics. This review collects the guide's named interfaces so you can distinguish a correct design from a plausible-looking command, path, or field. Recheck every item against the current official guide and documentation before release.

Agent Loop and Session State

Mechanic	What to recall	Decision boundary
stop_reason: "tool_use"	Execute the requested tool, append the matching result, and continue	Do not infer loop state from natural-language phrases
stop_reason: "end_turn"	The model has reached the normal terminal turn	Also handle errors, limits, cancellation, and other terminal states in production
Tool result identity	Return each result against the originating tool-use identifier	Never join concurrent results by array position
Conversation state	Preserve the content blocks required for the next request	Extract durable facts outside lossy summaries