Conciseness

Three short paragraphs with zero padding — every instruction (one topic at a time, separator + updated list each response, add/remove rules) is behavior Claude does not already know, matching 'lean and efficient; every token earns its place'. The only rationale sentence ('so we don't lose track of things') justifies its rule rather than padding.

Actionability

Concrete, executable guidance: exact separator token (`---`), cadence ('In every following response'), placement ('below the discussion'), and explicit add/remove rules including the 'next' edge case. Not 5 because the rendered output format is never shown — no example of what the separator-plus-list looks like, and the list's bullet/format is unspecified.

Workflow Clarity

This is a simple single-task skill and its single action is unambiguous: address one topic, then append a `---` separator and an updated list of remaining items, with lifecycle rules (add only on approval, remove resolved). The simple-skill exception applies; the operation is non-destructive so no validation checkpoint is required. Not 4 because the sequence, cadence, and placement are all fully specified with no gaps.

Progressive Disclosure

At 7 body lines with no bundle files (no references/, scripts/, or assets/ exist), nothing needs external splitting — all content is appropriately inline and self-contained. The under-50-line guideline applies: well-organized, immediately navigable content with no buried or nested references.

Specificity

"Keep track of open topics and decisions" names the domain (open topics, decisions) plus a single generic action, matching the 'domain and 1-2 concrete actions, but not comprehensive' anchor. It does not rise to 4 because the capability coverage is thin — the body's actual behaviors (maintain a running list, append approved items, remove resolved ones) are not surfaced in the description.

Completeness

It explicitly answers both: what ("Keep track of open topics and decisions") and when ("Use when the user says \"keep-track\" or asks to keep a running list of remaining items") with concrete quoted trigger phrases, matching the top anchor. It is not a 4 case because the 'when' clause is already explicit and specific rather than merely present.

Trigger Term Quality

Triggers are "keep-track" and "keep a running list of remaining items" — natural phrases, but coverage misses common variations users would say ("action items", "open questions", "outstanding decisions", "todo list"), matching the 'some relevant keywords but missing common variations or synonyms' anchor. Not 4 because the keyword set is narrow rather than having only 'a few' terms missing.

Distinctiveness Conflict Risk

The exact-name trigger and the specific phrase "keep a running list of remaining items" give it a mostly distinct trigger profile with only minor overlap risk against general todo/list-keeping skills. Not 5 because the broad concept 'keep track of open topics and decisions' could plausibly collide with list-maintenance skills; not 3 because the quoted triggers are far more specific than 'Works with document files'.