Conciseness

Mostly lean — compact tables and targeted jsonc snippets with no padding and no explanation of concepts Claude already knows. Minor trimmable duplication keeps it below 5: the entity-query snippet appears verbatim in both Function Calls and Examples, and the Expression Types table is repeated in references/syntax-reference.md.

Actionability

Concrete, executable jsonc snippets cover literals, structs, lists, tuples, dicts, calls, let, fn, if, and comparisons. Below 5 because the Function Definition and Let Binding patterns use unexplained placeholders ('_', 'body_expr') that are not executable as written.

Workflow Clarity

Clear organization — expression types, then each construct, then Common Patterns, Do/Don't, and Examples, with a References section for deeper detail. Below 5 because elements like the '_' wildcard and the fn argument structure are left implicit rather than explained or validated inline.

Progressive Disclosure

The body is a concise overview and all four bundle files (syntax-reference.md, special-forms.md, data-constructors.md, type-dsl.md) exist, are clearly signaled with one-line descriptions in the References section, and are one level deep (siblings cross-link, no nesting). Parser source paths add useful navigation; content is appropriately split.

Specificity

The what-clause is a single capability statement ('HashQL J-Expr syntax for writing queries'); the concrete items (#literal/#struct/#list constructs, function call syntax) appear only as triggers in the when-clause rather than as an enumerated list of actions. This matches the 'names domain and 1-2 concrete actions' anchor — not 4, since no several distinct actions are listed, and not 2, since the domain and constructs are named concretely.

Completeness

Explicitly answers both what ('HashQL J-Expr syntax for writing queries') and when ('Use when writing J-Expr code, ... or working with HashQL query files (.jsonc)') with concrete trigger phrases. Matches the anchor-5 example structure exactly; the when-clause is explicit and specific, so 4 does not fit.

Trigger Term Quality

Natural terms a HashQL user would say are comprehensively covered: 'writing J-Expr code', 'using #literal/#struct/#list constructs', 'understanding function call syntax', 'working with HashQL query files (.jsonc)', including the file extension. No natural synonym for this niche is missing.

Distinctiveness Conflict Risk

'HashQL' and 'J-Expr' are highly specific niche terms with distinct triggers; there is virtually no overlap risk with other skills. Clear niche with minimal conflict risk, matching the 5 anchor.