Lists multiple specific concrete actions across different tiers: 'manual rolling binary replacement with finalization control', 'Console-initiated major upgrades', 'maintenance windows for patches', 'release channel selection', and notes automatic upgrades for lower tiers.

Clearly answers both 'what' (tier-appropriate upgrade procedures with specific details per tier) and 'when' ('Use when planning, executing, or monitoring a version upgrade'). The explicit 'Use when...' clause covers the key trigger scenarios.

Includes strong natural keywords users would say: 'version upgrade', 'CockroachDB', 'Self-Hosted', 'Advanced', 'BYOC', 'Standard', 'Basic', 'rolling binary replacement', 'maintenance windows', 'patches', 'release channel', 'planning', 'executing', 'monitoring'. Good coverage of terms a user working with CockroachDB upgrades would naturally use.

Highly distinctive — focuses specifically on CockroachDB version upgrades with tier-specific procedures. The combination of CockroachDB + version upgrades + tier differentiation creates a clear niche unlikely to conflict with other skills.

The skill is generally efficient and well-structured with tables and code blocks, but includes some unnecessary content like the Standard and Basic tier sections which are essentially 'nothing to do' and could be condensed to a single line each. The context-gathering tables are thorough but slightly verbose with 'Why It Matters' columns that explain things Claude could infer.

Excellent actionability throughout — provides fully executable SQL queries for pre-upgrade validation, concrete bash commands for each deployment platform (systemd, K8s Operator, Helm, manual), specific SQL for monitoring and finalization, and even a Cloud API curl command. All code is copy-paste ready with clear placeholders.

The Self-Hosted upgrade workflow is exceptionally well-sequenced with explicit validation checkpoints: pre-upgrade validation queries, per-node verification before proceeding, finalization gating on all nodes matching, and a clear rollback path. The 'verify each node before proceeding to the next' checkpoint and the irreversibility warnings on finalization demonstrate strong feedback loops.

Content is well-organized with clear tier-based routing table, cross-references to related skills (cluster health, maintenance, settings) that are one level deep and clearly signaled. The internal document structure uses headers and a routing table effectively, and external references to official docs are cleanly listed at the end.