Conciseness

The body is dominated by executable commands, a dense comparison table, and env-var specifics with almost no explanation of concepts Claude already knows. It falls short of anchor 5 because of padding: the borg1/borg2 table repeats identical mappings (create, extract, prune, check, mount) where only rcreate/rdelete/compact differ, and the Rules section restates advice already given inline (e.g., capture stderr, use --json).

Actionability

Every section provides copy-paste-ready commands with concrete container names, user flags, env vars, and paths — including a complete throwaway-repo recipe for both borg and borg2, JSON output examples, and an executable Python snippet against the live app. This matches the anchor-5 'fully executable, specific examples cover the common cases' example.

Workflow Clarity

Steps 1-4 give a clear, headed sequence with a precondition checkpoint (verify the container is running before anything else). It is not anchor 5 because there are no error-recovery feedback loops — no guidance for what to do when a command fails (passphrase errors, missing repo, permission issues) — but it is above anchor 3 since the sequence is explicit with a real validation checkpoint, and the only destructive operation (rm -rf cleanup) is narrowly scoped to /tmp test repos with a stated rule.

Progressive Disclosure

No bundle files exist, and the single SKILL.md is well-organized with clear, well-signaled sections and no nested references. It is not anchor 5 (the skill exceeds 50 lines and the borg1/borg2 cheat sheet plus env-var reference are API-style content that could live in a reference file), and not anchor 3 because nothing is buried and structure is clean throughout.

Specificity

The description names one concrete action — 'exec-ing into the borg-web-ui Docker container' — but does not list several distinct capabilities (running commands, inspecting output, creating test repos are only implied), matching the 'names domain and 1-2 concrete actions' anchor. It is above anchor 2 because the named action is specific (a named container and mechanism), not generic.

Completeness

It explicitly answers both questions: the 'what' is 'Live Borg debugging by exec-ing into the borg-web-ui Docker container' and the 'when' is a fully explicit 'Use when...' clause listing four concrete trigger conditions. This matches the anchor-5 example structure precisely; it is not anchor 4 because the 'when' needs no further specificity.

Trigger Term Quality

Natural phrases like 'debugging borg commands', 'writing tests against real borg output', and 'developing borg 2.0 features' give good coverage across debugging, testing, and development scenarios. It falls short of anchor 5 because common user terms for this domain — 'backup', 'archive', 'repository', 'restore' — are absent.

Distinctiveness Conflict Risk

The description targets a clear niche — the named 'borg-web-ui' container and 'borg 2.0' features — with distinct triggers that would not plausibly fire for other skills. Minimal conflict risk, matching anchor 5.