Web Application Testing
anthropics/skills
Tests local web applications with Python Playwright scripts, checking frontend behavior, capturing screenshots and reading browser console logs.
Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests.
Install Tau E2E Testing Deterministic
$ npx skills add dpc/tau --skill tau-e2e-testing-deterministic -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpc/tau tau-e2e-testing-deterministic --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/dpc/tau.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .claude/skills/tau-e2e-testing-deterministic && 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 "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .claude/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministicType 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 dpc/tau --skill tau-e2e-testing-deterministic -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpc/tau tau-e2e-testing-deterministic --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpc/tau.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .agents/skills/tau-e2e-testing-deterministic && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .agents/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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 dpc/tau --skill tau-e2e-testing-deterministic -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpc/tau tau-e2e-testing-deterministic --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpc/tau.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .cursor/skills/tau-e2e-testing-deterministic && 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 "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .cursor/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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/dpc/tau.git --path .agents/skills/tau-e2e-testing-deterministic--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 dpc/tau --skill tau-e2e-testing-deterministic -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpc/tau tau-e2e-testing-deterministic --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpc/tau.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .gemini/skills/tau-e2e-testing-deterministic && 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 "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .gemini/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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 dpc/tau tau-e2e-testing-deterministicInstalls 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 dpc/tau --skill tau-e2e-testing-deterministic -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dpc/tau.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .github/skills/tau-e2e-testing-deterministic && 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 "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .github/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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 dpc/tau --skill tau-e2e-testing-deterministic -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dpc/tau tau-e2e-testing-deterministic --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpc/tau.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/tau-e2e-testing-deterministic .opencode/skills/tau-e2e-testing-deterministic && 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 "tau-e2e-testing-deterministic" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-e2e-testing-deterministic into .opencode/skills/tau-e2e-testing-deterministic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-e2e-testing-deterministic", 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
tau-e2e-testing-deterministic- GitHub stars
- 104
- Token cost
- ~445 tokens
- SKILL.md length
- 184 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- MPL-2.0
At a glance
Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests.
- Tasks that involve End-to-end testing
- Calls nix and cargo
What it does
Tau E2E Testing Deterministic is an agent skill from dpc/tau. Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests.
Its SKILL.md is about 450 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 End-to-end testing. The repository describes itself as: Tau Coding Agent - like Pi, but twice as much. The licence is MPL-2.0.
When your agent uses it
- Tasks that involve End-to-end testing
Example prompts
- “/tau-e2e-testing-deterministic”
What it can do on your machine
Read from SKILL.md and the folder at commit d2e1955. 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:
nixcargo
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
Tau E2E Testing Deterministic loads about 445 tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 184 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 dpc/tau at commit d2e1955, republished under its MPL-2.0 licence (© dpc). 184 words, ~445 tokens.
Download SKILL.mdSave it as
.claude/skills/tau-e2e-testing-deterministic/SKILL.md (or your agent's skills folder).- name
- tau-e2e-testing-deterministic
- description
- Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests.
Deterministic fake-provider E2E
Run the hermetic headless acceptance lane with:
cargo nextest run -p dpc-tau-e2e-tests --test deterministic_provider --no-tests=failRun the network-denied CI-equivalent lane with:
nix build -L .#ci.testsThe focused fake-provider command builds exact-path tau-e2e-fake-provider
and tau-e2e-test-dummy subprocesses. It needs no provider credentials,
network, VCR variables, shell, tmux, or sleeps. Do not set TAU_VCR for this
focused command.
Set TAU_E2E_KEEP_ARTIFACTS=1 during local diagnosis to retain successful
private roots. Panic failures retain them automatically and print the path.
Artifacts include generated config/scenario, durable typed session events,
extension stderr, and the bounded semantic fake-provider trace.
This focused fake-provider command covers the harness/provider extension seam and one deterministic dummy-tool continuation. It does not cover provider-builtin, ChatGPT lowering/parsing, WebSocket behavior, production retries, universal packaging, or terminal rendering. Keep VCR and transcript replay separate.
nix build -L .#ci.tests builds and runs the complete network-denied CI test
derivation: workspace tests plus its deterministic post-checks. One separate
post-check pins the exact current-profile tau-ext-provider-builtin through
TAU_E2E_PROVIDER_BUILTIN_BIN; a direct unpinned workspace run intentionally
skips that test. See docs/testing.md for the direct pinned invocation. This
E2E covers a keyless loopback Chat Completions 429 park and ordinary manual
retry release, not automatic expiry or broader retry behavior.
© dpc, MPL-2.0. 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 .agents/skills/tau-e2e-testing-deterministic of dpc/tau.
Open the folder on GitHubat commit d2e1955
Compare with similar skills
Tau E2E Testing Deterministic 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 |
|---|---|---|---|---|---|---|
| Tau E2E Testing Deterministic this skilldpc/tau | 104 | — | ~445 | Automated safety check: Pass | MPL-2.0 | |
| Web Application Testinganthropics/skills | 180k | 51 repos | ~966 | Automated safety check: Pass | Apache-2.0 | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| Uloop Replay Inputkurotu/VRCQuestTools | 373 | 3 repos | ~615 | Automated safety check: Pass | MIT | |
| Ui4 Convert Testspayloadcms/payload | 45k | — | ~3.5k | Automated safety check: Pass | MIT | |
| E2Estackia/rtp2httpd | 2.2k | — | ~517 | Automated safety check: Pass | GPL-2.0 |
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Related
Categories
Questions about Tau E2E Testing Deterministic
What does Tau E2E Testing Deterministic do?
Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests. Tau E2E Testing Deterministic is an agent skill from dpc/tau. Run and diagnose Tau's always-on deterministic fake-provider end-to-end tests.
When should I use Tau E2E Testing Deterministic?
Tau E2E Testing Deterministic fits situations like: tasks that involve End-to-end testing.
How do I install Tau E2E Testing Deterministic in Claude Code?
Run `npx skills add dpc/tau --skill tau-e2e-testing-deterministic -a claude-code`. Or copy the skill folder (.agents/skills/tau-e2e-testing-deterministic in dpc/tau) into .claude/skills/tau-e2e-testing-deterministic in your project. Claude Code loads it when a task matches its description.
How do I install Tau E2E Testing Deterministic in Codex?
Run `npx skills add dpc/tau --skill tau-e2e-testing-deterministic -a codex`. Or copy the skill folder (.agents/skills/tau-e2e-testing-deterministic in dpc/tau) into .agents/skills/tau-e2e-testing-deterministic in your project. Codex loads it when a task matches its description.
Can I use Tau E2E Testing Deterministic 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 dpc/tau --skill tau-e2e-testing-deterministic -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tau-e2e-testing-deterministic, .gemini/skills/tau-e2e-testing-deterministic, .github/skills/tau-e2e-testing-deterministic and .opencode/skills/tau-e2e-testing-deterministic in your project.
What does Tau E2E Testing Deterministic need to run?
Going by SKILL.md and its folder, Tau E2E Testing Deterministic needs the command-line tools its instructions call (nix and cargo).
Does Tau E2E Testing Deterministic 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 Tau E2E Testing Deterministic 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 Tau E2E Testing Deterministic use?
Tau E2E Testing Deterministic is published under the MPL-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tau E2E Testing Deterministic use?
About 445 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 Tau E2E Testing Deterministic?
Skills that share tags, products or a category with Tau E2E Testing Deterministic: Web Application Testing (anthropics/skills, 180k stars), TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), Uloop Replay Input (kurotu/VRCQuestTools, 373 stars) and Ui4 Convert Tests (payloadcms/payload, 45k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tau E2E Testing Deterministic?
dpc (a GitHub user) maintains it in dpc/tau, which has 104 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 5, 2026.
Source: dpc/tau on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.