Sentry skill: code-simplifier and the getsentry/skills collection

Source: getsentry/skills · Maintainer: community: Sentry · License: Apache-2.0 · Checked: 24 October 2026

What is the Sentry skill?

The most-installed Sentry skill that passes all three skills.sh security audits is code-simplifier, from Sentry's getsentry/skills repo: it has Claude Code or another agent tidy recently changed code for clarity and consistency while keeping its behavior exactly the same. The repo's most-installed skill overall is security-review, but two of its three audits fail, covered below.

getsentry/skills is a Claude Code plugin marketplace of engineering workflow skills. The README is clear about who it is for: "Agent skills for Sentry employees, following the Agent Skills open format." It is public and licensed Apache-2.0, so anyone can install it, but some skills (create-branch, pr-writer, brand-guidelines) follow Sentry's own conventions.

The code-simplifier description reads: "Simplifies and refines code for clarity, consistency, and maintainability while preserving all functionality. Use when asked to "simplify code", "clean up code", "refactor for clarity", "improve readability", or review recently modified code for elegance. Focuses on project-specific best practices."

As of 24 October 2026, its skills.sh page listed about 8,700 installs (snapshot, 24 October 2026).

Which Sentry skills are most installed?

The skills.sh listing for getsentry/skills showed 34 skills and about 116,800 total installs. The top four, with their audit results:

Looking for Sentry product skills? The getsentry/skills README points elsewhere: "For skills to help set up Sentry in your project or debug production issues, see https://github.com/getsentry/sentry-for-ai". That repo (MIT) covers SDK setup, fixing issues, alerts and instrumentation. Its README says it is a source repo and that you install a client plugin built from it, such as getsentry/plugin-claude for Claude Code.

What does code-simplifier do?

The SKILL.md casts the agent as a code simplification specialist and gives it five principles:

1. Preserve functionality. "Never change what the code does - only how it does it."
2. Apply project standards. Follow the coding standards in CLAUDE.md, with a default list: ES modules with sorted imports, the function keyword over arrow functions, explicit return types on top-level functions, explicit Props types for React components, and consistent naming.
3. Enhance clarity. Reduce nesting, remove redundant code and abstractions, use clearer names, drop comments that describe obvious code, and avoid nested ternaries in favor of switch or if/else.
4. Maintain balance. Don't over-simplify: no clever one-liners, no merging too many concerns, no removing abstractions that help.
5. Focus scope. Only refine code changed in the current session unless told to look wider.

Its process is identify, analyze, apply standards, confirm behavior is unchanged, verify the result is simpler, and document only significant changes. Three before-and-after TypeScript examples close the file: a nested ternary turned into a function with early returns, a chained filter, map and reduce split into named steps, and a one-line helper replaced with a direct items.length > 0 check.

The folder contains only SKILL.md. An HTML comment at the top credits Anthropic's code-simplifier agent as the source. The sentry-skills plugin also ships a separate code-simplifier subagent based on the same file, and the README uses that agent as its example of how Sentry vendors outside work.

How do you install Sentry's skills?

Claude Code plugin (whole set). From the getsentry/skills README:

claude plugin marketplace add getsentry/skills
claude plugin install sentry-skills@sentry-skills

The README says to restart Claude Code after installing and that skills then activate automatically when relevant. To update, it gives claude plugin marketplace update and claude plugin update sentry-skills@sentry-skills. Plugin skills are namespaced as /plugin-name:skill-name per the Claude Code skills docs, so this one appears as /sentry-skills:code-simplifier.

One skill only. The command shown on skills.sh:

npx skills add https://github.com/getsentry/skills --skill code-simplifier

The folder lands in .claude/skills/code-simplifier/ in your project, or ~/.claude/skills/code-simplifier/ with -g. Running npx skills add getsentry/skills without --skill lets you choose skills from the whole repo, per the skills CLI README. Codex and Cursor read the same SKILL.md format; see Codex skills and Cursor skills.

How do you use it?

Run it after a feature works and before you open the PR, so it only touches fresh changes.

Example prompts (suggestions, not quotes from the repo):

• Simplify the code I changed in this session. Don't change behavior.
• /sentry-skills:code-simplifier Clean up the new checkout handler, especially the nested ternaries.
• Refactor src/billing/invoice.ts for clarity. Keep the public API and outputs identical.
• Review my last commit for readability and suggest simpler versions of anything overly compact.

Requirements: none beyond your agent. There are no scripts, packages or API keys. It reads your CLAUDE.md for standards, so the result is only as project-specific as that file. Run your tests afterward, since the skill asks the agent to preserve behavior but does not run anything to prove it.

Tips and limits

From the files and pages linked, not from testing:

• code-simplifier audits. As of 24 October 2026, skills.sh showed Pass from Gen Agent Trust Hub, Socket and Snyk, audited 15 September 2026.
• security-review audits. As of 24 October 2026, skills.sh showed Fail from Gen Agent Trust Hub and Socket and Pass from Snyk, audited 29 September 2026. Socket raised one HIGH malware alert on references/supply-chain.md, which contains example malicious install hooks and a reverse shell. Gen Agent Trust Hub gave a CRITICAL risk level, with a recommendation that one file was identified as malware by FileRep; its written analysis judged the malware and pattern detections false positives on documented vulnerability examples. Read the files yourself before installing it.
• The default standards are opinionated. The function keyword, explicit return types and import rules are TypeScript and React habits. If your project prefers arrow functions, say so in CLAUDE.md, since the skill defers to project standards.
• Several code-simplifiers can overlap. Anthropic's original is a subagent in its official plugin marketplace. Sentry's plugin installs both this skill and its own code-simplifier subagent, each based on Anthropic's file. Installing Anthropic's plugin as well gives you overlapping behavior.
• License. The repo is Apache-2.0. The security-review folder has its own LICENSE noting its references derive from the OWASP Cheat Sheet Series under CC BY-SA 4.0.

Save it in your Kipt library

In Kipt, open Skills and paste the code-simplifier folder link into the import box. For a repo with many skills, Kipt shows a list to pick from, so you can take agents-md or find-bugs in the same pass. You can also drop the folder or a .zip. Your skills live in your own private GitHub repo and install into Claude Code or Codex with one command:

npx skills add https://github.com/<you>/<repo>.git --all -g

Kipt is not affiliated with Sentry.

Similar skills

• Code review skill: a structured review to run after the cleanup.
• Improve codebase architecture skill: for structural changes bigger than line-level simplification.
• Differential review skill: Trail of Bits' security review of a diff, an alternative to security-review that passes its audits.
• AGENTS.md guide: the instruction files Sentry's agents-md skill writes; code-simplifier reads your standards from CLAUDE.md.