chore: add missing keyword

[Planeshifter]

Description

What is the purpose of this pull request?

Aligning outliers in os with namespace majority patterns (random namespace pick, seed 3849209493).

This pull request:

• Adds the missing utility keyword to @stdlib/os/configdir's package.json to bring it in line with the rest of the os/* namespace.

Namespace summary

• Namespace: os
• Members analyzed: 8 (arch, byte-order, configdir, float-word-order, homedir, num-cpus, platform, tmpdir)
• Features analyzed: file tree, package.json top-level keys / scripts / stdlib / keywords, manifest.json presence, README section set + sequence, test/ / benchmark/ / examples/ file names, export kind, public signature, validation prologue, error construction, JSDoc shape, dependency set.
• Features with clear majority (≥75%): file tree core (13 files, 100%), package.json top-level keys (19 keys, 100%), return kind == value (100%), keyword set (13 keywords at ≥75%), README sections Usage / Examples / CLI (100%), See Also (87.5%), Notes (75%).
• Features without clear majority (excluded): benchmark/benchmark.js presence (3/8), manifest.json presence (2/8), package.json browser key (3/8), README C APIs subsection (2/8), exact ordered README section sequence (5/8), export kind const-vs-function (5/3), validation prologue / error construction (only 1 package validates arguments — insufficient data for a vote).

Per-outlier corrections

@stdlib/os/configdir

Added missing utility keyword to package.json. The keyword is present in 7 of 8 os/* packages (87.5% conformance); configdir was the sole outlier. Inserted between "utilities" and "utils" to match the ordering in os/homedir and os/tmpdir.

Related Issues

Does this pull request have any related issues?

No.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

Validation

What was checked:

• Structural feature extraction across all 8 members (file tree, package.json shape + keywords, manifest.json shape, README section headings, test/ / benchmark/ / examples/ file names).
• Semantic feature extraction on each lib/main.js + lib/index.js (export kind, public signature, validation prologue, error-construction style, JSDoc shape, @stdlib/* dependency set).
• Three-agent drift validation on every feature where a ≥75% majority was identified (semantic review, cross-reference review, structural review).

What was deliberately excluded:

• num-cpus missing populated ## See Also content — the section scaffold is present but empty, and the template comment explicitly says "Do not manually edit this section, as it is automatically populated". Fix is owned by the remark-stdlib-related tooling, not by a manual patch.
• platform and tmpdir missing ## Notes section — platform has nothing noteworthy to document (Agent 1: intentional deviation; Agent 3: no mechanical fix available). tmpdir's lib/main.js JSDoc does contain a ## Notes block, but its content is historical trivia about Node's os.tmpdir() introduction in io.js / Node v4 — and stdlib's tmpdir does not use os.tmpdir(). Porting it would propagate stale content, so dropped as not high-signal.
• Features without a ≥75% majority (see namespace summary above).

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

This PR was prepared by Claude Code running a cross-package drift-detection routine over a randomly selected stdlib namespace (seed 3849209493 → os). Claude extracted structural and semantic features across the 8 os/* members, computed per-feature ≥75% majority patterns, ran three parallel validation agents (opus semantic review, opus cross-reference review, sonnet structural review) against each candidate drift, and applied only the single correction that cleared all three gates: adding "utility" to @stdlib/os/configdir's keywords. The remaining candidates (README Notes / See Also absences) were intentionally dropped because they either require autogen tooling or would propagate stale content. Leaving as a draft for a human maintainer to audit before promotion.

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@stdlib-js/reviewers

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
os/configdir	$\color{green}129/129$ $\color{green}+100.00%$	$\color{green}17/17$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}129/129$ $\color{green}+100.00%$

The above coverage report was generated for the changes in this PR.