Conciseness

The ~1,130-line body is information-dense and mostly project-specific knowledge Claude cannot know, but several long winding prose passages (the anstream-vs-std macro discussion spanning dozens of lines, the hyperlink/OSC 8 section) and repeated flag-acknowledgment examples could be tightened. It fits the 3 anchor ("mostly efficient but includes some unnecessary explanation or could be tightened") better than 4, which requires only minor trims.

Actionability

Exceptionally concrete throughout: GOOD/BAD example pairs, executable Rust snippets (eprintln/stderr-flush patterns, StyledLine usage, Display impl newline patterns), exact helper names (format_path_for_display, suggest_command, format_bash_with_gutter), and source-file pointers. Copy-paste ready and covers the common cases; matches the 5 anchor.

Workflow Clarity

As a standards document it provides clear decision rules — the warning-placement decision tree, stream-choice decision principle with per-command examples, and pointers to validating guard tests (check_stderr_macros_come_from_styling, snapshot-test patterns). Sequence and checkpoints are mostly present, but it is reference material rather than a validated multi-step workflow, so the 4 anchor ("clear sequence with most checkpoints present") fits better than 5.

Progressive Disclosure

The skill is a single monolithic ~47KB SKILL.md with no bundle files (references/, scripts/, assets/ absent), and the body's in-file source pointers (src/progress.rs, src/output/handlers.rs) are code locations, not skill references. Section headers and tables give it real structure, lifting it above the 2 anchor (no headers), but large bodies of content that clearly belong in separate reference files (message patterns, hyperlink rules, verbose-output spec, documentation examples) are inlined, matching the 3 anchor.

Specificity

The description names concrete capabilities ("Documents ANSI color nesting rules, message patterns, and output system architecture") and enumerates specific trigger surfaces — "warning_message, hint_message, error_message, info_message, eprintln, or println" plus "CLI help, progress UI, snapshot text". Multiple specific concrete items with comprehensive coverage for this domain; not the 4 anchor because no meaningful coverage gaps remain.

Completeness

Explicitly answers both: what ("CLI output formatting standards for worktrunk... Documents ANSI color nesting rules, message patterns, and output system architecture") and when ("Load before editing any code that calls ... or that produces strings the user will see") with concrete trigger phrases. Matches the 5 anchor's what+when with concrete triggers; not 4 because the when-clause is fully explicit, not just present.

Trigger Term Quality

Strong keyword coverage: exact function names (warning_message, hint_message, eprintln, println), concrete output surfaces (CLI help, progress UI, snapshot text), and ANSI color nesting. A few natural terms a user might say are missing (e.g., stdout/stderr streams, "user-facing output"), so it sits between the 4 anchor (good coverage, a few natural terms missing) and the 5 anchor (comprehensive synonyms).

Distinctiveness Conflict Risk

Clear niche (worktrunk CLI output formatting) with distinct triggers — the specific worktrunk function names would rarely collide with another skill. Minimal conflict risk; matches the 5 anchor's "clear niche with distinct triggers."