The agent-catalog graph is the single source of truth for the v6 domain. Every other artifact — node-kind specs, validation rules, generated documentation, the wiki, generator code, the SDK, and user-facing interfaces — is a projection of the graph, never authored independently.

The debt loop is the engine that keeps the v6 ecosystem in alignment after the forward phases (1–5) have laid down the initial artifacts. It detects, prioritizes, and closes drift between what is true in the world and what every projection of the graph claims is true. Levels are ordered by priority — lower level numbers always win — because a finding at Level N invalidates every derivation at Levels N+1..7.

When closing a gap at Level N, propagate the change down through Levels N+1..7 BEFORE picking up generic gaps at higher levels. Track each propagated change as an entry in the gap node's propagationStatus field; the gap is not closed until every applicable level reads done or not-applicable (with a one-line reason).

Every phase and every debt-loop level has a named owner. Owners are represented as Authority nodes in the graph and referenced from the owner field on Gap nodes (and on Claim, EvidenceSource per the evidence model).

Human-readable form of every tracked gap. Each file in this directory mirrors a Gap node in the graph (see graph/02-node-kinds/catalog-meta.md, NodeKind Gap).