Conciseness

The body is a dense catalog of project-specific types (e.g. 'SCValType enum (22 variants)', 'OperationType enum (27 operations)') — exactly the information Claude cannot know generically — with essentially no filler. The only marginal padding is the expanded acronym 'XDR (External Data Representation)' and one sentence of context about git submodule status, which is genuinely useful project-specific fact. Fits the anchor 'lean and efficient; assumes Claude's competence; every token earns its place'; not a 4 because there is no over-explanation of concepts Claude already knows.

Actionability

For a reference/lookup skill, the guidance is concrete: an explicit dependency DAG showing which file each module lives in, plus the actionable instruction 'Never edit .h files directly; always modify the .x source files.' Fits anchor 4 ('mostly executable guidance; concrete code or commands with minor gaps'). Not a 5 because there are no commands for regenerating headers or verifying changes, and it never explicitly tells the reader to consult the actual .x file for full definitions; not a 3 because the file-level pointers are specific and immediately usable.

Workflow Clarity

This is a single-purpose lookup skill with no risky or multi-step operation, so no validation checkpoints are required; navigation is unambiguous via the dependency graph and per-module sections. Fits anchor 4 ('clear sequence with most checkpoints present; minor gaps') in the sense that the consultation flow (locate module → read summary) is clear, but the implied next step (open the .x file for authoritative detail) is never stated. Not a 5 because that final pointer is missing; not a 3 because nothing is ambiguous or fragile.

Progressive Disclosure

No bundle files (references/, scripts/, assets/) exist and the skill references none, so there are no buried or nested references to penalize; all content lives in SKILL.md, which is appropriate for a skill whose stated purpose is a self-contained token-efficient summary. Section headers, a dependency tree, and per-module subsections make navigation easy. Fits anchor 4 ('good structure; most content is appropriately placed; minor organization gaps') — the 230-line catalog could arguably be split per module, though the summary-first design justifies inlining. Not a 5 because the size exceeds the 'under 50 lines, no external references needed' bar and a per-module split would allow finer-grained loading.

Specificity

The description names the domain ("protocol-curr subsystem") but offers only one generic action ("token-efficient summary"). It matches the anchor 'Names the domain but actions are minimal or generic' — it never says what the subsystem contains (XDR type definitions, .x files) or what concrete capabilities the skill provides. Not a 1 because 'protocol-curr' is a concrete, real domain rather than pure abstraction; not a 3 because it does not list even 1-2 concrete actions like 'summarizes XDR types' or 'maps ledger entry definitions'.

Completeness

A 'what' is present ("token-efficient summary of the protocol-curr subsystem") but there is no 'Use when...' clause or equivalent trigger guidance, so completeness is capped at 3 per the judging guidelines. Fits anchor 3 ('clear what but when is missing'). Not a 4 because the when is entirely absent rather than merely imprecise; not a 2 because the what, while thin, is not vague.

Trigger Term Quality

The only keyword is the internal jargon name "protocol-curr subsystem"; natural user phrases like 'XDR', 'Stellar', 'type definitions', '.x files', or 'ledger entries' are all missing. Fits anchor 2 ('one or two generic keywords; missing the natural phrases users say'). Not a 3 because there are no synonyms or variations present beyond the single subsystem name; not a 1 because the term is relevant and would be said by someone already working in this codebase.

Distinctiveness Conflict Risk

The unique subsystem name ('protocol-curr') carves out a clear niche and would rarely fire for unrelated skills. Fits anchor 4 ('mostly distinct; minor overlap risk with closely related skills') — e.g., sibling skills for adjacent subsystems or a 'protocol-old' variant could compete for the same query. Not a 5 because the description gives no content cues (XDR, Stellar) that would further separate it from other summary skills.