Conciseness

The body is lean and code-first: a two-sentence framing of the TextReasoningContent/TextContent distinction, one complete code example, one sentence on interleaving, two pointed anti-patterns, and a two-item verify list. Nothing explains concepts Claude already knows, and every token earns its place.

Actionability

The C# example is copy-paste ready and complete for the common case: `using Microsoft.Extensions.AI;`, message setup, `await foreach` over `client.GetStreamingResponseAsync`, and a switch with property patterns (`case TextReasoningContent { Text: { Length: > 0 } thinking }`) that directly implements the separation. The only placeholders (`RenderThinking`/`RenderAnswer`) are inherently app-specific UI hooks, explicitly labeled.

Workflow Clarity

This is a simple single-task skill and the action is unambiguous (iterate `update.Contents`, branch on content type). Per the simple-skill guideline this scores 5; it additionally includes a Verify section with two concrete checks (reasoning updates precede the answer; the answer contains only the response text).

Progressive Disclosure

The body is under 50 lines with no need for external references (no references/, scripts/, or assets/ exist in the bundle), and content is well-organized into three clearly signaled sections (Separate thinking from the answer, Anti-patterns, Verify). Per the guideline for short single-purpose skills, well-organized sections alone merit 5.

Specificity

The description lists multiple concrete actions with exact API type names: "distinguishing the model's reasoning trace from its answer on the client by matching TextReasoningContent vs TextContent in each ChatResponseUpdate's Contents", "rendering thinking and answer in different ways as they stream", and "deciding whether to carry the reasoning text into later turns". Coverage is comprehensive for the skill's scope (separate, render, carry-forward).

Completeness

It explicitly answers both: what ("Surface a reasoning/thinking model's intermediate thoughts separately from its final answer with the AG-UI .NET SDK") and when (an explicit "USE FOR:" clause with three concrete trigger scenarios, plus a "DO NOT USE FOR:" clause). This matches the anchor-5 example structure of concrete what + explicit when.

Trigger Term Quality

Good natural keyword coverage with synonyms: "reasoning/thinking model", "intermediate thoughts", "reasoning trace", "conversation history". A few natural variants users might say are absent (e.g. "chain of thought", "extended thinking"), which sits it between anchor 4 and 5, closer to 4 than the comprehensive-synonym anchor 5.

Distinctiveness Conflict Risk

Clear niche (reasoning/thinking display in the AG-UI .NET SDK) with an explicit "DO NOT USE FOR" clause that redirects the nearest overlapping case to a named sibling skill ("plain text streaming with no reasoning display (use agui-dotnet-streaming-chat)") and excludes tools, state, interrupts, multimodal, generative UI, protobuf. Minimal conflict risk.