Conciseness

The body is almost entirely lean, executable code with terse comments ('// Run command', '// Throws on non-zero exit') and no explanations of concepts Claude already knows. Not a 5 because of minor trimmable redundancy — repeated 'import { $ } from "bun"' boilerplate in every block and overlapping coverage between 'Piping', 'Common Patterns', and 'Basic Usage'; well above the 3-anchor's unnecessary prose.

Actionability

Every section contains copy-paste-ready TypeScript covering the common cases: basic usage with output capture ('const result = await $`ls -la`.text()'), error handling ('await $`exit 1`.quiet()'), spawn with stdio options, streaming with a reader loop, kill/timeout, and complete shebang scripts. This matches the 5-anchor (fully executable, common cases covered); nothing is pseudocode or abstract.

Workflow Clarity

Multi-step examples are clearly sequenced with checkpoints: the deploy script validates preconditions ('git status --porcelain' check before proceeding, tests before build before rsync) with a catch-based error path, and parallel commands show both $ and spawn approaches. Not 5 because the 'Git Operations' example does 'git add -A; git commit -m "Auto commit"' as a batch operation with no validation of what changed, and the common-errors table gives one-line fixes without recovery steps.

Progressive Disclosure

The 'When to Load References' section is well-signaled with explicit load conditions ('Load references/advanced-scripting.md when: complex pipelines, process groups, signal handling'), but neither references/advanced-scripting.md nor references/cross-platform.md exists in the bundle — no references/ directory is present at all, so the pointers are broken. Additionally, ~380 lines of inline API reference content could partly live in those reference files. This sits between the 3-anchor (references present but not fully functional/properly backed) and the 4-anchor (good structure with minor gaps); the broken references keep it from 4.

Specificity

Quotes: 'Bun shell scripting with Bun.$, Bun.spawn, subprocess management' names the domain plus several concrete capabilities (shell template API, spawn API, subprocess management). Not a 5 because it lists APIs/tools rather than actions and omits coverage like piping, error handling, or spawnSync; not a 3 because it goes beyond naming the domain with 1-2 actions.

Completeness

Both parts are explicit: 'what' = 'Bun shell scripting with Bun.$, Bun.spawn, subprocess management'; 'when' = 'Use for shell commands, template literals, or command execution'. Matches the 4-anchor (both present, 'when' could be more specific) rather than 5 because 'template literals' is an implementation detail users rarely say, and the trigger situations lack variety.

Trigger Term Quality

Quotes: 'Use for shell commands, template literals, or command execution' plus 'subprocess management' — good natural terms users would say. Missing common variations like 'bash', 'run a command', 'shell script', or '.sh', so it falls short of the comprehensive-synonyms anchor at 5 but clearly above the 3-anchor ('Works with PDF files' level) in coverage.

Distinctiveness Conflict Risk

The 'what' names Bun-specific APIs, but the trigger clause 'Use for shell commands, template literals, or command execution' is generic and could fire for any command-execution task, overlapping with general shell/bash skills or built-in shell tooling. Fits the 3-anchor ('somewhat specific but could still overlap with similar skills'); not 4 because the trigger wording itself carries no Bun-specific narrowing.