Conciseness

The body is lean and assumes Claude's competence — no concept explanations, and instructions like "Do not duplicate content already captured in other artifacts... Reference them by path or URL instead" earn their tokens. Minor trimmable overhead remains: the provenance blockquote and the trailing "**Version:** 1.0.0 / **Derived:**" footer duplicate metadata already in the frontmatter, and version numbers outside a deprecated section are penalized, so it sits at anchor 4 rather than 5.

Actionability

Gives a copy-paste-ready command ("Save it to a path produced by `mktemp -t handoff-XXXXXX.md` (read the file before you write to it)") and a concrete five-section output structure. Minor gaps keep it from anchor 5: no example of what an artifact-reference line should look like and no example handoff snippet, though as an instruction-only skill the guidance is otherwise actionable.

Workflow Clarity

The write path is concrete with a built-in checkpoint (mktemp → read before writing), and the output structure is fully specified, so the core action is unambiguous. However, the steps are presented in scattered prose rather than a sequence, and the body never says when in the flow to invoke the companion tools (that sequencing lives only in references/companion_tooling.md), fitting anchor 4's 'clear sequence with most checkpoints present; minor gaps' better than the simple-skill 5.

Progressive Disclosure

The body itself is a well-organized, one-level-deep overview that clearly signals references/companion_tooling.md, but scored against the actual bundle, three of the four reference files (deduplication_discipline.md, handoff_structure.md, next_session_skill_matching.md — ~480 lines of content elaborating the very sections the body lists) are referenced nowhere in SKILL.md and are undiscoverable from the entry point. That is more than a minor organization gap, so anchor 3 fits better than anchor 4.

Specificity

Names the domain and two concrete actions — "Compact the current conversation into a handoff document" and "References existing artifacts (PRDs, plans, ADRs, issues, commits, diffs) by path or URL instead of duplicating them" — but omits other capabilities the skill performs (suggesting skills for the next session, tailoring to the user's stated focus), so coverage is not comprehensive. Anchor 4 requires several specific actions; only two are listed, so it stays at 3 rather than 4.

Completeness

Explicitly answers both questions: the 'what' is "Compact the current conversation into a handoff document for another agent to pick up" and the 'when' is a concrete "Use when user wants to hand off the conversation to a fresh agent or starts a new session that picks up prior work" clause with specific trigger phrases. This matches anchor 5; it exceeds anchor 4, where the 'when' is present but could be more explicit.

Trigger Term Quality

Includes natural phrases users would actually say: "hand off the conversation", "a fresh agent", "starts a new session that picks up prior work", plus artifact names (PRDs, ADRs, commits, diffs). A few natural synonyms are missing (e.g., "continue where I left off", "transfer context"), which fits anchor 4 rather than 5's comprehensive synonym coverage, and it is clearly above anchor 3's 'some relevant keywords but missing common variations'.

Distinctiveness Conflict Risk

Session-continuity handoff is a fairly distinct niche with distinct triggers ("hand off", "new session that picks up prior work"), so it is mostly distinguishable from other skills. Minor overlap risk remains with generic conversation-summarization or compaction skills, keeping it at anchor 4 rather than 5's 'minimal conflict risk'.