The body is lean and assumes Claude's competence (e.g. "Abort when the working tree has uncommitted changes.", "Branch off the current HEAD, named after the target key.") with no padding or explanation of concepts Claude already knows; even the Technical-Task autocreation note is Jira-specific knowledge that earns its place, matching the 'lean and efficient; every token earns its place' anchor.

For an instruction-only skill the guidance is concrete and specific throughout — exact transition IDs (61, 41, 21), issue-type IDs (10004, 10001, 10002, 10153), named destination statuses, and a defined branch-naming rule — giving unambiguous, actionable direction rather than vague description, satisfying the instruction-skill actionability bar without needing literal commands.

A clear sequenced workflow (Resolve -> Prerequisites -> Determine Target -> Start Parent -> Start Child -> Branch -> Plan) with explicit validation checkpoints and feedback loops — abort on uncommitted changes, refuse on a different user's in-progress status, and refetch subtasks until the Technical Task appears — matching the 'clear sequence with explicit validation steps; feedback loops for error recovery' anchor.

The body is under 50 lines, needs no external references (none exist and none are referenced), and is organized into well-labeled section headers, which per the scoring notes lets a simple self-contained skill score 3 on progressive disclosure with just well-organized sections.

Quotes the domain and an action ("Start work on a Jira ticket.") which names the Jira-ticket domain and a recognizable action verb, but it lists only a single abstract action rather than multiple concrete actions, so it stops at the 'names domain and some actions, not comprehensive' anchor rather than the multi-action level 3.

It states what the skill does ("Start work on a Jira ticket.") but provides no explicit 'Use when...' or equivalent trigger guidance, so per the judging guidelines completeness is capped at 2 with 'what' present and 'when' only implied.

It includes natural terms a user might say ("Jira ticket", "start work"), but coverage is thin with no common variations such as ticket key, sprint, branch, or begin work, matching the 'some relevant keywords but missing common variations' anchor and falling short of broad level-3 coverage.

The Jira-ticket start-work niche is specific and unlikely to overlap with unrelated skills, matching the 'clear niche with distinct triggers; unlikely to conflict' anchor rather than the more generic level-2 case.