Conciseness

The written prose is lean: no explanations of concepts Claude already knows, no padded sections, and the stuck-report checklist is compact and purposeful. The only minor redundancy is the opening line restating the frontmatter description, which does not rise to the over-explanation of the score-4 anchor, so the score-5 'every token earns its place' anchor is the best fit.

Actionability

The core instructional content is unfilled template placeholders — '{{QUICKSTART}}' and '{{REFERENCE_MAP}}' provide no code, commands, or steps — so a reader cannot execute anything. The only concrete guidance is the stuck-report checklist (specific fields like 'Sandbox Agent version', 'SDK in use') and support links, which lifts it above the no-guidance score-1 anchor into the score-2 'minimal concrete guidance; missing the specific steps to execute' anchor.

Workflow Clarity

The primary task workflow is entirely absent (the Quickstart is a placeholder), leaving only the rough stuck-handling sequence, which has many gaps and no validation checkpoints. That matches the score-2 'rough sequence present but many gaps' anchor rather than score 1, because the stuck section is a coherent ordered list with concrete report fields.

Progressive Disclosure

Section headers are well-named (Quickstart, Reference Map), but the Reference Map is an empty placeholder and no references/, scripts/, or assets/ directories exist, so navigation points to nothing and there is no content appropriately split anywhere. The structure exists only as a template shell, fitting the score-2 'minimal structure... references' anchor better than the score-3 anchor, which assumes actual references and inline content are present.

Specificity

The description lists multiple specific concrete actions with comprehensive coverage: 'Deploy, configure, and integrate', 'creating and managing agent sessions via SDK or API', 'streaming agent events', 'handling human-in-the-loop interactions', 'building chat UIs', and 'understanding the universal schema for agent responses'. This matches the score-5 anchor; coverage of the skill's capabilities is complete with no minor gaps that would justify a 4.

Completeness

It clearly answers both 'what' ('a universal API for orchestrating AI coding agents... in sandboxed environments') and 'when' with an explicit, multi-trigger 'Use when' clause covering server setup, session management, event streaming, chat UI building, and schema understanding. This mirrors the score-5 example structure exactly; the 'when' is explicit and concrete, not the weaker form of the score-4 anchor.

Trigger Term Quality

It comprehensively covers natural terms users would actually say, including named tools and providers ('Claude Code, Codex, OpenCode, Amp', 'E2B, Daytona, Docker'), plus phrases like 'agent sessions', 'chat UIs', 'SDK', and 'sandbox'. Specific product names plus generic phrasings give both the specific and the colloquial trigger variations, matching the score-5 anchor rather than the 4 anchor (no noticeable natural terms missing).

Distinctiveness Conflict Risk

It occupies a clear niche — orchestrating AI coding agents in sandboxed environments via a specific named product ('Sandbox Agent') with named providers and agents — so trigger terms are unlikely to fire for unrelated skills. Minimal conflict risk matches the score-5 anchor.