Conciseness

The body is dense with non-obvious port-specific facts — "There is no change callback", "Both always happen", "**No callback returns the signed bytes.**", "Unmounting loses edits", "There is no undo or redo", PDF-points-not-CSS-pixels coordinates — and assumes Claude's competence, never explaining what a PDF, Svelte, or Blob is. Every section earns its tokens, matching the lean-and-efficient anchor rather than anchor 4's "minor instances of over-explanation".

Actionability

The imports block, the four minimal Svelte examples, and the upload function are complete and copy-paste ready, with exact prop/callback names. It falls short of fully-executable: the sign-and-stamp snippet is a fragment with undefined variables (pad, pageCount, pdfBytes), and the promised complete example "examples/sign-and-upload-pdf.svelte" does not exist in the bundle, leaving the custom-signature common case without a runnable reference.

Workflow Clarity

Each component gets a numbered Load→Edit→Save lifecycle with genuine checkpoints: onDocumentLoadError, "Warn users before they overwrite an original", the beforeNavigate/beforeunload guard against losing edits, and the upload function's `if (!res.ok) throw` check. It stops short of anchor 5 because there is no recovery guidance after a load error or a failed upload — no validate→fix→retry loop for those failure paths.

Progressive Disclosure

The overview is well organized with clearly signaled one-level-deep references, and all four references/*.md files exist and cover the bulk detail (props tables, callbacks, helpers). It is not anchor 5 because two referenced paths — examples/sign-and-upload-pdf.svelte and examples/edit-spreadsheet-save-to-api.svelte — are cited in SKILL.md and in references/e-signature.md and references/xlsx-editor.md but do not exist in the bundle, breaking those navigation paths.

Specificity

The description lists multiple concrete actions covering every component: "edit a PDF, rotate/reorder/delete PDF pages", "build a Word or .docx editor", "build a spreadsheet or .xlsx editor", "edit cells or formulas in the browser", "capture a signature", "add e-signature", "sign a PDF", "stamp a signature onto a PDF", and "save/export/upload an edited document". This matches the anchor for multiple specific concrete actions with comprehensive coverage; anchor 4 (minor gaps in coverage) fits worse because each of the four components' action sets is explicitly named.

Completeness

"This skill should be used when the user asks to..." is an explicit when-clause with concrete trigger phrases, and the what is a full action list terminating in the specific stack "in a Svelte 5 app using extend-ui-svelte (PdfEditor, DocxEditor, XlsxEditor, ESignature)". Both what and when are clearly and explicitly answered, matching the anchor-5 example pattern; the when-clause is not merely implied as at anchor 4.

Trigger Term Quality

Natural user phrasing is comprehensively covered with synonyms and extensions: "sign a PDF", "capture a signature", "add e-signature", "stamp a signature", "Word or .docx editor", "spreadsheet or .xlsx editor", "edit cells or formulas". Only the literal ".pdf" extension is absent while "PDF" appears in every natural variant, so this sits at the comprehensive anchor rather than anchor 4.

Distinctiveness Conflict Risk

The scoping to "a Svelte 5 app using extend-ui-svelte" with named components gives a clear niche, but the leading triggers ("edit a PDF", "sign a PDF", "build a Word or .docx editor") are broad document-editing phrases that would also match generic PDF/office-document skills when the user does not mention Svelte. This is mostly distinct with minor overlap risk against closely related skills — anchor 4, not anchor 5's "minimal conflict risk".