Conciseness

The body is lean and assumes competence (no explanation of what Markdown is), with only a minor redundancy: the prefer-Markdown-over-ODT/DOCX guidance appears both in the opening paragraph and again as the first Practical rules bullet, which could be trimmed; this fits anchor 4 rather than the fully lean anchor 5.

Actionability

An executable JSON text_editor example with an explicit .md path, concrete patch-vs-write edit guidance, and the specific open_in_canvas flag make the guidance mostly copy-paste ready; the minor gap is that the edit/patch path has no example, keeping it at anchor 4 rather than 5.

Workflow Clarity

The four-step workflow (decide whether an artifact is useful, create with an explicit .md path, read-then-patch-or-write for edits, report the path) is clearly sequenced and unambiguous. Operations are neither destructive nor batch, so the validation cap does not apply, and the simple-skill exception allows a 5 for a single clearly-guided task.

Progressive Disclosure

The body is under 50 lines with well-organized sections (overview, workflow, example, practical rules) and no content that warrants external reference files; the simple-skill exception applies, so well-organized sections alone merit a 5.

Specificity

"Write or edit Markdown notes, reports and plain text" names the domain plus exactly two concrete actions (write, edit), matching the 'names domain and 1-2 concrete actions, but not comprehensive' anchor; it does not list the several specific actions needed for a 4.

Completeness

A clear 'what' ("Write or edit Markdown notes, reports and plain text") and an explicit 'when' ("default for non-Office writing") are both present, but the 'when' is phrased as a default rather than a 'Use when...' trigger clause and could be more specific; this fits anchor 4, not 3 (the 'when' is stated, not merely implied) and not 5 (no concrete user-trigger phrasing).

Trigger Term Quality

Natural keywords like "Markdown", "notes", "reports", and "plain text" are present, but common variations and synonyms users would say (".md", "md", "draft", "brief") are missing from the description, matching the 'some relevant keywords but missing common variations' anchor.

Distinctiveness Conflict Risk

The "default for non-Office writing" clause explicitly carves out a niche distinct from Office-format skills, but "notes, reports and plain text" is broad writing territory with minor overlap risk against other writing/document skills, matching anchor 4.