Conciseness

The body is almost entirely procedural — exact paths, config keys, an argument mapping table, and templates — with no re-teaching of concepts Claude already knows. Minor trimmable redundancy exists: skill-context precedence rules are explained both in the "Shared project skill-context" section and again across Step 0's ~19-line application block, and "CRITICAL" warnings repeat. Not 3 because the padding is localized (<10% of the body) rather than pervasive.

Actionability

Fully concrete guidance for an instruction-only skill: config resolution order with explicit defaults, a complete argument→pattern mapping (including legacy aliases and suffixed variants), copy-paste AskUserQuestion prompts, a full output template, and a verified one-level reference for pattern details. Not 4 because the common cases (configured, default, and missing-input invocations) are all covered with executable specifics.

Workflow Clarity

Steps 0→5 are clearly sequenced with explicit user-decision gates ("Wait for their answer before generating"), a missing-file fallback with a ready-to-show message, a pre-generation alignment check (Step 1.5), and a validate→fix feedback loop ("After generating any output artifact, verify it against all skill-context rules... fix the output before presenting it"). The skill writes documentation rather than performing destructive/batch operations, so the validation cap does not apply.

Progressive Disclosure

The 700-line pattern knowledge base is correctly split into references/architecture.md (a real file), clearly signaled three times in the body and at exactly one level of depth, while SKILL.md retains only the workflow and the output template it needs inline. Not 4 because there is no misplaced inline content and navigation to the reference is explicit and repeated.

Specificity

The description lists multiple concrete actions with named artifacts — "Analyzes tech stack from DESCRIPTION.md", "recommends an architecture pattern", "creates .ai-factory/ARCHITECTURE.md" — covering the skill's capabilities comprehensively; unmentioned side effects (DESCRIPTION.md/AGENTS.md pointer updates) are incidental, not capability gaps.

Completeness

It explicitly answers both questions: the "what" is concrete (analyze tech stack, recommend pattern, create .ai-factory/ARCHITECTURE.md) and the "when" is an explicit "Use when" clause with three concrete trigger scenarios. Matches the anchor-5 pattern of what + when with concrete triggers; not 4 because the when-clause is specific rather than generic.

Trigger Term Quality

Triggers "setting up project architecture", "which architecture", and "after /aif setup" are phrases users would naturally say, but common variations such as "system design", "architecture pattern", or "monolith vs microservices" are absent. Not 3 because several genuinely natural trigger phrases are present; not 5 because synonym coverage is incomplete.

Distinctiveness Conflict Risk

The niche (architecture guideline generation within the /aif workflow, anchored by ".ai-factory/ARCHITECTURE.md" and "/aif setup") is mostly distinct, with only minor overlap risk against sibling aif-* skills like setup or roadmap that also touch project context files. Not 5 because "setting up project architecture" is still somewhat broad as a standalone trigger.