Conciseness

Dense, load-bearing tables with no explanation of concepts Claude already knows; every row maps a topic to concrete skills and depth differences. Not 5 because provenance asides ("mined from real review comments on PR #1184/#1230", "sourced from jokob's own real PR comments, #1739/#1744") add narration that could be trimmed; not 3 because there is no padded or redundant material.

Actionability

Concrete, executable guidance throughout: exact paths (".github/skills/<name>/SKILL.md", ".gemini/skills/<name>/SKILL.md"), script and constant names ("scripts/check_skill_pairs.py", "GROUPS", ".github/copilot-instructions.md"), and per-row pointers to which tree's version is richer. Not 5 because some rows describe coverage rather than instruct; not 3 because commands and paths are specific and usable.

Workflow Clarity

The primary lookup task is unambiguous via the topic-to-tree table, and the "Adding a New Skill" section gives a clear ordered sequence (create in both directories, add table entry, keep bodies identical, mirror to Claude and update GROUPS) with the CI drift check as a checkpoint. Not 5 because the add-a-skill sequence has no explicit validation step to run after the change; not 3 because the sequence and the drift-flagging check are both stated.

Progressive Disclosure

Well-organized single-file skill (no bundle files) with clear sections and navigable tables; the cross-tree notes are the point of the index. Not 5 because several long table-cell notes (devcontainer, install-scripts, pr-analysis rows) inline detail that lives in the referenced skills themselves; not 3 because structure and navigation are good and content placement is mostly appropriate.

Specificity

Names the domain ("Index of all available skills across GitHub Copilot (.github/skills/), Gemini CLI (.gemini/skills/), and Claude Code (.claude/skills/)") and two concrete actions ("find the right skill for a task", "locate the counterpart skill in another assistant's tree") with exact directory paths. Not 5 because it lists only two user-facing actions; not 3 because both actions and their targets are explicit and path-specific.

Completeness

Explicitly answers both: what ("Index of all available skills across [three trees]") and when ("Load this to find the right skill for a task, or to locate the counterpart skill in another assistant's tree") with concrete trigger phrases. A 4 would require a weaker or less explicit 'when' clause, which this does not have.

Trigger Term Quality

Natural phrases a user would say ("find the right skill for a task", "counterpart skill") plus assistant names (GitHub Copilot, Gemini CLI, Claude Code) give good keyword coverage. Not 5 because common variations like "list skills" or "what skills exist" are absent.

Distinctiveness Conflict Risk

Clear niche (this project's three-assistant skill trees) with distinct triggers; unlikely to fire for a wrong skill. Anti-drift check: a 4 would imply notable overlap with a closely related skill, and no such skill is evident.