The ~100-line body is lean and operational — a routing table, terse numbered workflow, and one-line guardrails packed with non-obvious gotchas ('Run Box CLI commands strictly one at a time', 'avoid get_file_preview for files known to exceed 3 MB') that earn their tokens; it assumes Claude's competence and never explains what Box is. Not level 2 because there is no concept padding, and the references appear in three places only because each listing serves a distinct navigational role (pairing, category selection, glossary).

Gives concrete, copy-paste-ready guidance — exact CLI commands ('box users:get me --json'), a runnable smoke-check code block invoking scripts/box_cli_smoke.py and box_rest.py, and guardrails with specific numeric thresholds; not level 2 because the examples are executable commands rather than pseudocode or abstract description.

The 8-step Workflow is clearly sequenced with explicit validation built in (step 6 prove the smallest end-to-end flow, step 7 add a runnable verification step) plus a dedicated Verification section with read-after-write feedback loops; the destructive/batch cap at 2 does not apply because validation is present even for bulk operations. Not level 2 because checkpoints and verification are explicit, not merely implied.

SKILL.md is a well-signaled overview pointing to 8 one-level-deep reference files (verified present and organized), with the routing table, step 5, and a References glossary providing clear navigation; content is appropriately split between orchestration and detail. Not level 2 because signaling and structure far exceed the 'inline content that should be separate' anchor, though one referenced path — examples/box-content-api-prompts.md — does not exist on disk.

Lists many concrete actions — 'uploads, folders, folder listings, downloads and previews, shared links, collaborations, search, metadata, event-driven automations, and Box AI retrieval flows' — matching the anchor for multiple specific concrete actions; not level 2 because the action list is comprehensive rather than domain-plus-a-few.

Clearly answers both what (build and troubleshoot Box integrations for the listed operations) and when via an explicit 'Use when Codex needs to...' clause, satisfying the anchor for both what AND when with explicit triggers; not capped at 2 because the 'Use when' trigger guidance is present and specific.

Natural trigger phrases a user would say are well covered — 'add Box APIs or SDKs to an app', 'wire Box-backed document workflows', 'organize or share content', 'react to new files', 'fetch Box content for search, summarization, extraction, or question-answering'; not level 2 because common variations (uploads, search, shared links, metadata) are present alongside the technical terms.

A clear Box-content niche with distinctive triggers ('Box APIs or SDKs', 'Box-backed document workflows', 'Box content') makes conflict with other skills unlikely; not level 2 because the scope is tightly scoped to Box content operations rather than overlapping generic document/file skills.