TDD
pietheinstrengholt/rssmonster
Test-driven development. An agent skill from pietheinstrengholt/rssmonster.
Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested.
Install Test Harnesses
$ npx skills add vchelaru/FlatRedBall --skill test-harnesses -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vchelaru/FlatRedBall test-harnesses --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/vchelaru/FlatRedBall.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/test-harnesses .claude/skills/test-harnesses && 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 "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .claude/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnessesType 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 vchelaru/FlatRedBall --skill test-harnesses -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vchelaru/FlatRedBall test-harnesses --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/test-harnesses .agents/skills/test-harnesses && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .agents/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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 vchelaru/FlatRedBall --skill test-harnesses -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vchelaru/FlatRedBall test-harnesses --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/test-harnesses .cursor/skills/test-harnesses && 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 "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .cursor/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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/vchelaru/FlatRedBall.git --path .claude/skills/test-harnesses--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 vchelaru/FlatRedBall --skill test-harnesses -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vchelaru/FlatRedBall test-harnesses --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/test-harnesses .gemini/skills/test-harnesses && 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 "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .gemini/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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 vchelaru/FlatRedBall test-harnessesInstalls 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 vchelaru/FlatRedBall --skill test-harnesses -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/test-harnesses .github/skills/test-harnesses && 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 "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .github/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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 vchelaru/FlatRedBall --skill test-harnesses -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vchelaru/FlatRedBall test-harnesses --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vchelaru/FlatRedBall.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/test-harnesses .opencode/skills/test-harnesses && 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 "test-harnesses" agent skill from https://github.com/vchelaru/FlatRedBall/tree/NetStandard/.claude/skills/test-harnesses into .opencode/skills/test-harnesses/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-harnesses", 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
test-harnesses- GitHub stars
- 578
- Token cost
- ~442 tokens
- SKILL.md length
- 165 words
- Files
- 1
- Skills in repo
- 32
- Repo updated
- First seen
- Licence
- MIT
At a glance
Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested.
- Tasks that involve Test-driven development
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Test Harnesses is an agent skill from vchelaru/FlatRedBall. Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested. Triggers: TDD, "how would we test", end-to-end, LiveGameProcess, GoldProject, FakeGameSide, BuildSmoke, LiveGame.
Its SKILL.md is about 440 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 Testing & QA, covering Test-driven development. The repository describes itself as: Cross-platform 2D game engine focused on ultimate productivity built in .NET. The licence is MIT.
When your agent uses it
- Tasks that involve Test-driven development
Example prompts
- “t be tested. Triggers: TDD,”
- “/test-harnesses”
What it can do on your machine
Read from SKILL.md and the folder at commit fa654ab. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Test Harnesses loads about 442 tokens when it runs. Until then it costs about 77 tokens; SKILL.md has 165 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
The full file from vchelaru/FlatRedBall at commit fa654ab, republished under its MIT licence (© vchelaru). 165 words, ~442 tokens.
Download SKILL.mdSave it as
.claude/skills/test-harnesses/SKILL.md (or your agent's skills folder).- name
- test-harnesses
- description
- Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested. Triggers: TDD, "how would we test", end-to-end, LiveGameProcess, GoldProject, FakeGameSide, BuildSmoke, LiveGame.
Test Harnesses
Before calling a scenario untestable, or proposing a new harness, check this table and ls the
TestSupport folders. Details live in [[glue-live-game-testing]] (real game process) and
[[glue-unit-test-bootstrap]] (headless Glue, gold projects).
| Need | Harness | Category |
|---|---|---|
| Glue-side socket behavior with no game | FRBDK\Glue\Tests\GlueUnitTests\GameCommunicationPlugin\FakeGameSide.cs | default |
| Real project loaded headlessly in Glue, codegen run, built, live-edit code embedded | TestSupport\GoldProject.cs | BuildSmoke |
| Built game launched and driven over the real live-edit socket | TestSupport\LiveGameProcess.cs | LiveGame |
| Embedded (game-side) logic compiled and run in a scratch game project | pattern explained in GlueControl\VariableAssignmentLogicEnumConversionTests.cs | BuildSmoke |
#if version gates in embedded code, no build | GlueControl\EmbeddedVersionGateTests.cs (Roslyn) | default |
| Embedded files that compile without a game, run in-process | Tests\EngineUnitTests links them in with <Compile Include ... Link> | engine tests |
Gotchas
- A race doesn't need to happen for real to be tested. Put the files and timestamps into the state the race leaves behind, then launch.
- Extending a harness beats working around it. If
LiveGameProcess.StartAsyncorGoldProjectlacks a hook for the step you need, add the hook there.
© vchelaru, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .claude/skills/test-harnesses of vchelaru/FlatRedBall.
Open the folder on GitHubat commit fa654ab
Compare with similar skills
Test Harnesses 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 |
|---|---|---|---|---|---|---|
| Test Harnesses this skillvchelaru/FlatRedBall | 578 | — | ~442 | Automated safety check: Pass | MIT | |
| TDDpietheinstrengholt/rssmonster | 564 | 30 repos | ~906 | Automated safety check: Pass | MIT | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| TDDsanity-io/sanity | 6.4k | 20 repos | ~1k | Automated safety check: Pass | MIT | |
| Test Driven Developmentfarm-fe/farm | 5.6k | 51 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Tapd Story PipelineTencentBlueKing/bk-bcs | 841 | — | ~2.6k | Automated safety check: Pass | Custom licence |
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Questions about Test Harnesses
What does Test Harnesses do?
Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested. Test Harnesses is an agent skill from vchelaru/FlatRedBall. Index of FRB1's existing test harnesses (fake game socket, gold project load+build, real game launch, embedded-code tests) — check here before saying a scenario can't be tested.
When should I use Test Harnesses?
Test Harnesses fits situations like: tasks that involve Test-driven development.
How do I install Test Harnesses in Claude Code?
Run `npx skills add vchelaru/FlatRedBall --skill test-harnesses -a claude-code`. Or copy the skill folder (.claude/skills/test-harnesses in vchelaru/FlatRedBall) into .claude/skills/test-harnesses in your project. Claude Code loads it when a task matches its description.
How do I install Test Harnesses in Codex?
Run `npx skills add vchelaru/FlatRedBall --skill test-harnesses -a codex`. Or copy the skill folder (.claude/skills/test-harnesses in vchelaru/FlatRedBall) into .agents/skills/test-harnesses in your project. Codex loads it when a task matches its description.
Can I use Test Harnesses 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 vchelaru/FlatRedBall --skill test-harnesses -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-harnesses, .gemini/skills/test-harnesses, .github/skills/test-harnesses and .opencode/skills/test-harnesses in your project.
What does Test Harnesses need to run?
SKILL.md names no scripts, command-line tools or credentials: Test Harnesses is instructions for the agent only.
Does Test Harnesses access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Test Harnesses 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 Test Harnesses use?
Test Harnesses is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Test Harnesses use?
About 442 tokens (SKILL.md is roughly 1.8k 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 Test Harnesses?
Skills that share tags, products or a category with Test Harnesses: TDD (pietheinstrengholt/rssmonster, 564 stars), TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), TDD (sanity-io/sanity, 6.4k stars) and Test Driven Development (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Test Harnesses?
vchelaru (a GitHub user) maintains it in vchelaru/FlatRedBall, which has 578 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on October 8, 2026.
Source: vchelaru/FlatRedBall on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.