Chart Tests
astronomer/airflow-chart
A skill your agent uses when writing, editing, reviewing, or running Helm chart tests for the Astronomer airflow-chart repository.
A skill your agent uses when writing, editing, reviewing, or running Helm chart tests for the Astronomer APC repository.
Install Chart Tests
$ npx skills add astronomer/astronomer --skill chart-tests -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install astronomer/astronomer chart-tests --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/chart-tests .claude/skills/chart-tests && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .claude/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-testsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add astronomer/astronomer --skill chart-tests -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install astronomer/astronomer chart-tests --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/chart-tests .agents/skills/chart-tests && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .agents/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add astronomer/astronomer --skill chart-tests -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install astronomer/astronomer chart-tests --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/chart-tests .cursor/skills/chart-tests && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .cursor/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/astronomer/astronomer.git --path .agents/skills/chart-tests--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add astronomer/astronomer --skill chart-tests -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install astronomer/astronomer chart-tests --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/chart-tests .gemini/skills/chart-tests && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .gemini/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install astronomer/astronomer chart-testsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add astronomer/astronomer --skill chart-tests -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/chart-tests .github/skills/chart-tests && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .github/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add astronomer/astronomer --skill chart-tests -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install astronomer/astronomer chart-tests --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/astronomer/astronomer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/chart-tests .opencode/skills/chart-tests && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "chart-tests" agent skill from https://github.com/astronomer/astronomer/tree/master/.agents/skills/chart-tests into .opencode/skills/chart-tests/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "chart-tests", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
chart-tests- GitHub stars
- 491
- Token cost
- ~3.2k tokens
- SKILL.md length
- 757 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when writing, editing, reviewing, or running Helm chart tests for the Astronomer APC repository.
- Works in 4 steps: Always run tests with uv run — never… → Sub-chart values MUST be nested under… → No helm unittest plugin — all tests are… → …
- Running Helm chart tests for the Astronomer APC repository
- SKILL.md covers Critical Rules, Test Organization, Writing Tests and ConfigMap Scripts, plus 3 more sections
- Calls uv, python3 and pytest
What it does
Chart Tests is an agent skill from astronomer/astronomer. Use when writing, editing, reviewing, or running Helm chart tests for the Astronomer APC repository. Covers pytest patterns, renderchart() usage, sub-chart value nesting, parametrized tests, uv run commands, schema validation, and test organization.
Its SKILL.md is about 3.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in DevOps & Cloud, covering Container orchestration, Unit testing and Forms and validation. It works with pytest, Helm and Kubernetes. The repository describes itself as: Helm Charts for the Astronomer Platform, Apache Airflow as a Service on Kubernetes.
When your agent uses it
- Running Helm chart tests for the Astronomer APC repository
- Tasks that involve Container orchestration
- Tasks that involve Unit testing
Example prompts
- “/chart-tests”
Requirements
- Python 3
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Always run tests with uv run — never python3 -m pytest or python bin/...
- Sub-chart values MUST be nested under the sub-chart name (see Values Nesting)
- No helm unittest plugin — all tests are pytest-based using render_chart()
- One render_chart() call per test function — never call it multiple times in the same function to cover different value combinations (see…
What it can do on your machine
Read from SKILL.md and the folder at commit f9b0382. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
uvpython3pytesthelmpippython
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, helm and pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Chart Tests loads about 3.2k tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 757 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 757 words (~3,158 tokens).
“Templates in charts//templates/ belong to a sub-chart. Values for those templates must be nested under the sub-chart's top-level key:”
- name
- chart-tests
Files
Just SKILL.md in .agents/skills/chart-tests of astronomer/astronomer.
Open the folder on GitHubat commit f9b0382
Compare with similar skills
Chart Tests next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Chart Tests this skillastronomer/astronomer | 491 | — | ~3.2k | Automated safety check: Pass | Custom licence | |
| Chart Testsastronomer/airflow-chart | 297 | — | ~2.8k | Automated safety check: Pass | Custom licence | |
| Functional Testsastronomer/airflow-chart | 297 | — | ~2.2k | Automated safety check: Pass | Custom licence | |
| Measure Scenario TimesCybereason-Public/owLSM | 280 | — | ~676 | Automated safety check: Pass | GPL-2.0 | |
| Sim Helmsimstudioai/sim | 30k | — | ~2.2k | Automated safety check: Pass | Apache-2.0 | |
| Helm Chart ScaffoldingCybereason-Public/owLSM | 280 | 13 repos | ~381 | Automated safety check: Pass | GPL-2.0 |
Similar skills
Functional Tests
astronomer/airflow-chart
A skill your agent uses when writing, editing, reviewing, or running functional (end-to-end) tests for the Astronomer airflow-chart repository.
Measure Scenario Times
Cybereason-Public/owLSM
Adds temporary pytest-bdd timing hooks and writes debugscenariotimes.txt plus sorted step and scenario files.
Sim Helm
simstudioai/sim
Install, upgrade, and operate the Sim Helm chart on Kubernetes.
Helm Chart Scaffolding
Cybereason-Public/owLSM
Comprehensive guidance for creating, organizing, and managing Helm charts for packaging and deploying Kubernetes applications.
NGINX Ingress Controller Feature Checklists
nginx/kubernetes-ingress
Gives step-by-step checklists for adding Ingress annotations, VirtualServer fields and Helm values to the NGINX Kubernetes Ingress Controller, with common gotchas.
More from astronomer/astronomer
Functional Tests
astronomer/astronomer
A skill your agent uses when writing, editing, reviewing, or running functional (end-to-end) tests for the Astronomer APC repository.
Tools
astronomer/astronomer
A skill your agent uses when writing, editing, or reviewing command-line tools and helper scripts in this repo (things in bin/).
Helm Chart
astronomer/astronomer
A skill your agent uses for Helm chart work - creating charts, modifying existing charts, values design, testing.
Related
Works with
Categories
Questions about Chart Tests
What does Chart Tests do?
A skill your agent uses when writing, editing, reviewing, or running Helm chart tests for the Astronomer APC repository. Chart Tests is an agent skill from astronomer/astronomer. Use when writing, editing, reviewing, or running Helm chart tests for the Astronomer APC repository.
When should I use Chart Tests?
Chart Tests fits situations like: running Helm chart tests for the Astronomer APC repository; tasks that involve Container orchestration; tasks that involve Unit testing.
How do I install Chart Tests in Claude Code?
Run `npx skills add astronomer/astronomer --skill chart-tests -a claude-code`. Or copy the skill folder (.agents/skills/chart-tests in astronomer/astronomer) into .claude/skills/chart-tests in your project. Claude Code loads it when a task matches its description.
How do I install Chart Tests in Codex?
Run `npx skills add astronomer/astronomer --skill chart-tests -a codex`. Or copy the skill folder (.agents/skills/chart-tests in astronomer/astronomer) into .agents/skills/chart-tests in your project. Codex loads it when a task matches its description.
Can I use Chart Tests in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add astronomer/astronomer --skill chart-tests -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/chart-tests, .gemini/skills/chart-tests, .github/skills/chart-tests and .opencode/skills/chart-tests in your project.
What does Chart Tests need to run?
Going by SKILL.md and its folder, Chart Tests needs the command-line tools its instructions call (uv, python3, pytest, helm, pip and python). Our summary lists: Python 3.
Does Chart Tests access the network?
SKILL.md contains no URLs. Its commands use uv and pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Chart Tests safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Chart Tests use?
Chart Tests has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Chart Tests use?
About 3.2k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Chart Tests?
Skills that share tags, products or a category with Chart Tests: Chart Tests (astronomer/airflow-chart, 297 stars), Functional Tests (astronomer/airflow-chart, 297 stars), Measure Scenario Times (Cybereason-Public/owLSM, 280 stars) and Sim Helm (simstudioai/sim, 30k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Chart Tests?
astronomer (a GitHub organization) maintains it in astronomer/astronomer, which has 491 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 8, 2026.
Source: astronomer/astronomer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.