Conciseness

Operator tables and code blocks are lean (results inline as comments, minimal prose), but the when-to-group-variables guidance is presented three times — the 'Records as state — when to group variables' bullets and preferred/avoid examples, the near-duplicate 'Variable grouping — decision guide' table, and the grouped LocalState example in 'State variables' — and the Phase enum is re-shown in three sections. This is more than 'minor' trimming (anchor 3, 'could be tightened'), not 4.

Actionability

Nearly all guidance is executable with expected results ('Set(1, 2).union(Set(2, 3)) // Set(1, 2, 3)', the --main table, the `run quorumAssumptionTest` example, the file-layout convention). Minor gaps keep it at 4 rather than 5: the unexplained 'The primitive's `module_name` field (set during indexing) always holds the correct value' references external tooling a reader cannot act on, and several snippets carry placeholder comments ('// ... other vars unchanged').

Workflow Clarity

A reference skill, but content is sequenced the way a spec is written (module structure → types → definitions → state → actions → nondeterminism → operators → CLI/file layout), with a concrete two-file split, a --main selection table, and a validation loop for assumptions ('Run it with `quint test`; the test fails (reporting which conjunct broke)'). Matches anchor 4 — the typecheck→test→verify toolchain order itself is deferred to guidelines/cli.md, a minor checkpoint gap; no destructive/batch cap applies.

Progressive Disclosure

Good structure: quick-reference content inline, with details deferred through a clearly signaled, one-level-deep Guidelines table that summarizes each guidelines/*.md file. It falls short of 5 because the seven referenced guideline files are not present in the bundle being evaluated, and the ~550-line body inlines deep-dive material (records grouping, sum types, nested updates) that could live in those files — anchor 4 ('minor organization gaps').

Specificity

The description enumerates multiple concrete actions — 'writing or debugging the contents of a `.qnt` file, fixing a typecheck/parse error, ... analyzing an invariant violation or counterexample trace, or optimizing state-space exploration' — with comprehensive coverage of the skill's scope (syntax, operators, types, basicSpells, toolchain, output interpretation). This matches the 5 anchor ('Lists multiple specific concrete actions; comprehensive coverage'); it is not 4 because no capability area is missing.

Completeness

It explicitly answers both questions: what ('Quint language and CLI reference — the expert on Quint syntax, operators, types, basicSpells, the toolchain...') and when ('Use when writing or debugging the contents of a .qnt file, fixing a typecheck/parse error, looking up an operator or idiom...'). Concrete trigger phrases for both — matches the 5 anchor; the 'when' clause is explicit, not weakly implied (which would cap it at 3-4).

Trigger Term Quality

Natural trigger terms are comprehensive: 'quint, syntax, operators, typecheck, model checking, counterexample, basicSpells, CLI, specification language', plus the `.qnt` file extension in the 'Use when' clause. Matches the 5 anchor ('Comprehensive coverage of natural terms including synonyms and file extensions').

Distinctiveness Conflict Risk

It proactively disambiguates against the nearest neighbors: 'not for analyzing or running TLA+/TLC itself' and 'use the quint-modeling skill, which owns that workflow'. Clear niche with distinct triggers and minimal conflict risk — matches the 5 anchor; without these boundary sentences it would risk 3-4 overlap with a sibling Quint skill.