Conciseness

The body is lean — a 3-step usage section and 35 terse Name/Import/Source entries with zero concept explanation or padding, and every line carries lookup data. It falls short of level 5 only through mechanical redundancy: three StackOutputService entries are duplicated verbatim (same name, different import path) and the repeated 'Name:/Import:/Source:' labels could be a table. It is far too tight for level 3's 'unnecessary explanation' anchor.

Actionability

Every entry gives a copy-paste-ready import statement ('import { AdminAfterBuild } from "webiny/infra/admin"') and a concrete source path, and the How to Use section tells Claude exactly what to do (find, read source, import). It misses level 5 because there is no example of actually using an abstraction (e.g., registering a hook in a project extension), and only one entry (EnvVar) has a description.

Workflow Clarity

The 'How to Use' sequence is clear and correctly ordered for a read-only lookup skill: find the abstraction, read the source file for the exact interface, then import — with the MUST-read-source step acting as the checkpoint. No validation loop is needed since the skill performs no destructive or batch operations, so the level-3 cap does not apply. It stops short of level 5 only because there is no guidance for what to do after importing.

Progressive Disclosure

Structure is present (How to Use section, Abstractions catalog, per-entry separators) and there are no buried or nested references, but a ~230-line catalog of 35 entries is exactly the bulk reference material that belongs in a references/ file (e.g., references/abstractions.md) with SKILL.md holding only the overview and usage steps. This matches 'Some structure but could be better organized; content that should be separate is inline' — better than the unstructured inline block of level 2, short of the good split of level 4.

Specificity

The description names the domain ("Infrastructure — 35 abstractions.", "Infrastructure extensions.") but contains no concrete actions at all — it identifies a topic and a count, never what the skill does with them. It matches the anchor 'Names the domain but actions are minimal or generic' and falls short of level 3, which requires 1-2 concrete actions.

Completeness

The 'what' is vague (a count of 35 abstractions with no statement of purpose) and there is no 'when' clause — the missing 'Use when...' guidance caps completeness at 3, and the vague 'what' pulls it to the 'Has a vague what and no when' anchor.

Trigger Term Quality

Keywords are limited to "Infrastructure", "abstractions", and "extensions" — technical jargon with no natural phrases a user would say when needing this skill (e.g., nothing about hooks, Pulumi, deployment, or Webiny itself). It fits 'One or two generic keywords; missing the natural phrases users say' and is not empty enough for level 1 nor varied enough for level 3.

Distinctiveness Conflict Risk

"Infrastructure" is extremely broad and would overlap with any infrastructure, DevOps, or cloud skill; nothing in the description signals the Webiny/Pulumi niche. This sits squarely at 'Very broad; high overlap risk with many similar skills' — not level 1 (it does name a domain) but far from the distinct niche of level 4+.