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skill-installer

Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos).

Quality

88%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

86%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, highly actionable skill body: concrete verified commands, clear task routing, and documented failure handling with almost no padding. Remaining improvements are minor — removing one redundant line and adding an explicit post-install verification step.

DimensionReasoningScore

Conciseness

The body is lean and assumes Claude's competence, but has minor trimmable redundancy: the standalone line "Install skills with the helper scripts." duplicates the bullet list above it, and the intro bullets overlap the Scripts section. This fits 'efficient; minor instances of over-explanation that could be trimmed' rather than the fully lean 5.

4 / 5

Actionability

Fully executable guidance: exact commands with flags and concrete examples for each case (e.g., `scripts/list-skills.py --path skills/.experimental`, `scripts/install-skill-from-github.py --repo <owner>/<repo> --path <path>`), and the referenced scripts exist with matching argument surfaces, covering the common cases copy-paste ready.

5 / 5

Workflow Clarity

Task routing (list vs. curated install vs. repo install) is unambiguous and failure behavior is documented (auth errors fall back to git sparse checkout, abort if destination exists, explain and exit if listing unavailable). The gap is the absence of an explicit post-install verification step, which keeps it at 'clear sequence with most checkpoints' rather than 5.

4 / 5

Progressive Disclosure

At ~50 lines with well-organized sections and no external reference files needed, the skill meets the simple-skill guideline for a top score; its script references are real, one level deep, and correctly flag-matched against the actual bundle.

5 / 5

Total

18

/

20

Passed

Description

87%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description: third-person voice, explicit what-and-when structure, natural trigger phrases, and a clearly bounded niche. The only weakness is that the action list could be slightly more comprehensive.

DimensionReasoningScore

Specificity

"Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path" names the domain and several distinct actions (list, install curated, install from another repo), but coverage has minor gaps (e.g., no mention of updating or uninstalling), matching the 'several specific actions; minor gaps' anchor rather than the comprehensive 5.

4 / 5

Completeness

It explicitly answers both what ("Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path") and when ("Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo") with concrete trigger phrases, matching the top anchor.

5 / 5

Trigger Term Quality

Phrases like "list installable skills", "install a curated skill", and "install a skill from another repo (including private repos)" mirror natural user requests with reasonable variation, but a few common phrasings (e.g., "add a skill", "browse available skills") are absent, fitting the 'good keyword coverage; a few natural terms missing' anchor.

4 / 5

Distinctiveness Conflict Risk

The description occupies a clear niche (Codex skill installation into $CODEX_HOME/skills) with distinct, specific triggers; overlap risk with generic skills is minimal.

5 / 5

Total

18

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository

openai/codex

Path

codex-rs/skills/src/assets/samples/skill-installer/SKILL.md

Reviewed

Table of Contents

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