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Teach Claude Code or Codex to investigate Sedum failures and identify flaky, slow, or regressing tests without fetching every run’s full report. The skill lives in the Sedum core repository, alongside the CLI it uses: investigating-sedum-tests/SKILL.md. It works with hosted or self-hosted Sedum Cloud. Cloud supplies authenticated run history; installing the skill does not install a server, create an account, or grant access to a project. No MCP server is required.

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Install in Claude Code and Codex

Run this from the project where your agent works:
This uses the third-party skills CLI. Its current documentation requires Node.js 22.20 or newer; use the manual installation below if you do not want another installer. Remove either -a option to install for only one agent. Add -g for a personal installation available across projects instead of a project-local installation. The installer discovers the canonical .agents/skills source in the Sedum repository and installs it into the selected agents’ skill locations. Choose Project when prompted for scope, unless you want a personal installation. Review the installation summary and any overwrite warning: accepting replacement can discard local customizations. Do not install a second copy manually as well.

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Copy or download manually

The skill is one Markdown file, with no scripts or dependencies to copy. Open the raw SKILL.md, copy its entire contents, including YAML frontmatter, and save it at one of these paths: Or use this shell snippet from your project. Choose one destination; change it to the corresponding personal path above for a user-wide installation:
Project-local skills can be committed to your own repository so the team shares the same instructions. For reproducible installs, replace main in the download URL with a reviewed Sedum commit or tag. Copies do not update automatically; review changes before replacing an existing skill.

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Connect Sedum and try it

Installing the skill does not install the Sedum CLI. Sedum requires Node.js 20.19 or newer, independently of the optional skills installer’s higher requirement. If the project does not already depend on sedum-cli, install it first:
The commands below use that project’s installed CLI. Without it, npx sedum can download an unrelated npm package named sedum. Check that your installed version supports Cloud result reads, then sign in yourself:
Your account needs membership in the organization/project, and that project needs uploaded runs. The skill uses the saved project or explicit CLI overrides. Never paste tokens into an agent conversation or put credentials in the skill. See Cloud result reads for commands and limits. Start a fresh agent session after installation if the skill is not discovered. In Claude Code, invoke /investigating-sedum-tests; in Codex, select it with /skills or mention $investigating-sedum-tests. Then ask, for example:
The skill guides bounded investigation that is read-only by default. Changes, scheduling, and publishing actions such as posting issues require separate authorization. Retry recovery alone does not establish a root cause. Agent discovery conventions are documented by Claude Code and Codex.