Conciseness

The workflow is dense and every step carries API-level information with no explanation of concepts Claude already knows. Not 5 because the 'Default Decisions' section restates guidance already given in steps 2-4 (scoped before global, leaf before container, nested renderers for Markdown bodies) and could be trimmed; not 3 because there is no padded or unnecessary conceptual explanation.

Actionability

Concrete API names and signatures appear throughout ("setCustomComponents(customId, mapping)", "defineStreamingComponents(...)", "removeCustomComponents(customId)", props like node, loading, indexKey, estimatedPreviewHeightPx), but there is no code example showing an actual registration or component mapping in any framework. Missing the executable usage details that would lift it to anchor 4, yet far more specific than anchor 2's high-level hints.

Workflow Clarity

Six clearly sequenced steps (classify, prefer scoped, smallest safe override, preserve nested Markdown, keep props/cleanup, validate) with a validation step ('Prefer a local demo, targeted test, or docs build'). Not 5 because validation is soft guidance with no concrete command or fix-and-retry feedback loop; not 3 because the sequence and checkpoints are explicit, and the operations are not destructive/batch so no cap applies.

Progressive Disclosure

The ~50-line body is a clear decision guide, and references/patterns.md (verified to exist) is well-signaled ('Read references/patterns.md before choosing an override strategy'), one level deep, and appropriately holds the override-key table and per-framework patterns. Matches anchor 5's clear overview with well-signaled one-level-deep references; the sibling-skill and docs-guide pointers are supplementary, not nested.

Specificity

Names the domain and two concrete actions ("Override built-in Markstream node renderers and add trusted custom tags") plus specific APIs (setCustomComponents, streamingComponents, htmlComponents) and override keys (image, code_block, mermaid, link) across five frameworks. Between anchor 3's 1-2 actions and anchor 5's comprehensive coverage, since cleanup/registry-removal and parser-level capabilities are not stated.

Completeness

Explicitly answers both: "what" in the first sentence (override built-in node renderers, add trusted custom tags across Vue, React, Solid, Svelte, and Angular) and "when" via a concrete trigger list ("Use when Codex needs scoped setCustomComponents ... or nested renderers for tags such as thinking"). The when-clause lists concrete trigger phrases, matching the anchor-5 example rather than anchor 4's more generic 'Use when working with PDF files.'

Trigger Term Quality

Triggers are the exact identifiers a user of this library would say ("scoped setCustomComponents", "node override keys such as image, code_block, mermaid, or link", "nested renderers for tags such as thinking") with good framework breadth. Not 5 because broader natural phrasings like "custom renderer" or "component override" are absent; not 3 because coverage far exceeds a single generic keyword.

Distinctiveness Conflict Risk

Occupies a clear niche with Markstream-specific APIs, framework names, and override keys, so it is unlikely to trigger for the wrong skill. Matches anchor 5's 'clear niche with distinct triggers; minimal conflict risk'; nothing here is generic enough to overlap with sibling skills.