Conciseness

The ~31-line body is lean with zero padding: a one-line tool-invocation caveat ('lsp.*/mcp__lsp__* are tool-call names, not shell commands'), seven one-line tool descriptions, a minimal copy-paste config snippet, and a single closing tip. It assumes Claude's competence and never explains concepts Claude already knows — a clean match for anchor 5.

Actionability

Concrete tool names with parameter hints ('severity: "error"', 'from file, line, and character') and a complete, executable config JSON make the guidance mostly executable. However, there is no worked example of an actual tool call (argument shapes, a sample lsp.diagnostics or lsp.rename invocation), so it stops short of anchor 5's copy-paste-ready coverage of common cases.

Workflow Clarity

For a simple single-purpose skill the action is unambiguous, and an error-recovery pointer exists ('Use lsp.status first when diagnostics report a missing language server'). But the one genuinely multi-step flow — checking rename validity with lsp.prepare_rename before applying lsp.rename — is only implied by list order, not sequenced; this minor checkpoint gap places it at anchor 4 rather than 5.

Progressive Disclosure

The skill is under 50 lines with no need for external references (no references/, scripts/, or assets/ exist), and the body is organized into clear 'Tools' and 'Config' sections with nothing that belongs in a separate file. Per the simple-skill guideline, well-organized sections alone merit anchor 5.

Specificity

The description names the domain and five concrete capabilities — 'language-server diagnostics, definitions, references, symbols, or rename safety checks' — but omits other common LSP actions (hover, completion, formatting, code actions), leaving minor gaps in coverage. This matches anchor 4 ('several specific actions; minor gaps') rather than anchor 5's comprehensive coverage.

Completeness

The 'when' is explicit and specific ('Use when Codex needs ... in the current workspace'), and the 'what' is derivable from the listed capabilities, but there is no direct capability statement (e.g., 'Provides language-server tooling for ...') — the what is embedded in the trigger clause rather than stated separately. Anchor 4 ('both present; one could be more explicit') is the best fit; not 5 because the what is implicit, not 3 because the when-clause is fully explicit.

Trigger Term Quality

Good natural keyword coverage ('diagnostics', 'definitions', 'references', 'symbols', 'rename', 'workspace') that users would plausibly say, but it misses common variations such as the abbreviation 'LSP', 'go to definition', 'find usages', and 'lint errors'. Fits anchor 4 ('good coverage; a few natural terms missing') more than anchor 5's synonym/extension completeness, and is clearly above anchor 3's missing-variants level.

Distinctiveness Conflict Risk

The 'language-server' scope plus 'rename safety checks' carves a clear niche with mostly distinct triggers, but the bare words 'diagnostics', 'references', and 'symbols' could cause minor overlap with lint/test or general code-search skills. Anchor 4 ('mostly distinct; minor overlap risk with closely related skills') fits better than anchor 5's minimal-conflict bar.