Conciseness

The body is efficient and teaches only novel conventions (naming scheme, template, protocol) without explaining concepts Claude already knows, fitting anchor 4. It is below anchor 5 because of repeated content: the agent-reads-only-the-latest rule appears in both the intro and the reading steps, and UML.md's architectural role is stated in step 5 and again in the closing table.

Actionability

Everything is executable: an exact filename format with worked examples, a complete copy-paste-ready markdown template with fallback text for empty sections, and a numbered reading procedure — matching anchor 5's copy-paste-ready guidance covering the common cases. For an instruction-only skill this level of concreteness meets the top anchor despite having no code.

Workflow Clarity

Both procedures are clearly sequenced — the writing side has an explicit three-condition checklist of when to write, and the reading side is five unambiguous numbered steps — matching anchor 4. It misses anchor 5 because there is no post-write verification checkpoint (e.g., confirming the new file sorts lexicographically after the previous latest, the exact invariant the whole scheme depends on).

Progressive Disclosure

The single file is well-organized with clear section headers (naming, writing, reading, relation to other files) and no nested references, matching anchor 4's good structure with minor organization gaps. At ~128 lines with a ~50-line template, the content exceeds the under-50-line simple-skill exception, and the template is a natural candidate for a references/ file, so anchor 5's appropriately-split structure is not fully met.

Specificity

The description lists several concrete actions — "Write a handoff when finishing a session or completing a unit of work", "Read the latest handoff when resuming a project", and the read-only-most-recent rule — matching anchor 4's several specific actions with minor gaps. It falls short of anchor 5's comprehensive coverage because the lead verb "Manages the handoffs/ directory" is generic and the naming/template mechanics that make up much of the skill are unstated.

Completeness

It clearly answers both what ("a chronological log of session-ending state snapshots"; write on finish, read latest on resume) and when ("Load this skill when asked to hand off, wrap up, or when resuming a project that has a handoffs/ directory") with concrete trigger phrases, exactly matching anchor 5. It is above anchor 4 because the when-clause is explicit and multi-triggered rather than merely adequate.

Trigger Term Quality

Natural trigger phrases are present — "asked to hand off, wrap up, or when resuming a project that has a handoffs/ directory" — giving good keyword coverage a user would naturally say. A few natural variants are missing (e.g., "continue where we left off", "pick up the session"), keeping it at anchor 4 rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

The handoffs/ directory is a clear niche with distinct triggers (hand off, wrap up, resuming a project with a handoffs/ directory), giving minimal conflict risk with other skills — matching anchor 5. Only the mildly generic "wrap up" phrase hints at overlap, which is insufficient to drop to anchor 4's minor-overlap framing.