Conciseness

The ~440-line body is mostly dense directive content that assumes Claude's knowledge, but it has real redundancy and trimming opportunities — the 'Quick Reference' table restates the Loop Prevention hard rules already detailed above, and the Communication Standard section packs in three large output templates — putting it at 'mostly efficient but could be tightened' rather than clearly lean.

Actionability

It provides concrete, copy-paste-ready protocol templates with filled examples — exact '[INVOKE:role|question]' syntax, '[RESPONSE:role]' blocks, and a complete CFO burn-rate example — giving mostly executable guidance; it stops short of a 5 only because these are templates/placeholders rather than literal runnable code.

Workflow Clarity

The Internal Quality Loop is a clearly sequenced multi-step process (Steps 1-4) with explicit validation checkpoints — the SELF-VERIFY checklist, the recommendation→validator peer-verify table, the critic pre-screen triggers, and the founder feedback loop with 30/60/90 review — matching the anchor for clear sequence, feedback loops, and checklists.

Progressive Disclosure

Section organization is present, but everything is inlined in one ~440-line file, large blocks like the Quality Loop and Communication Standard templates could reasonably live in separate files, and the one external reference ('references/invocation-patterns.md') is a dangling path — the referenced file does not exist — so it lands at 'some structure but inlined content and a non-functional reference'.

Specificity

The description names the domain plus several concrete capabilities — 'Defines invocation syntax, loop prevention, isolation rules, and response formats' — matching the anchor listing several specific actions with minor gaps, but it omits other protocol features (broadcast, conflict resolution) so it is not comprehensive enough for a 5.

Completeness

It explicitly answers both 'what' ('Inter-agent communication protocol... Defines invocation syntax, loop prevention, isolation rules, and response formats') and 'when' ('Use when C-suite agents need to query each other, coordinate cross-functional analysis, or run board meetings...') with concrete trigger phrases, matching the top anchor exactly.

Trigger Term Quality

It includes natural phrases a user would plausibly say — 'query each other', 'coordinate cross-functional analysis', 'run board meetings with multiple agent roles' — giving good keyword coverage, though synonym/extension coverage is not exhaustive enough for a 5.

Distinctiveness Conflict Risk

It carves a clear niche (C-suite inter-agent orchestration) with distinct triggers ('C-suite agents', 'board meetings', 'inter-agent communication') and minimal overlap risk with other skills.