Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
A skill your agent uses when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex…
Install Tau Cargo Crap
$ npx skills add dpc/tau --skill tau-cargo-crap -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpc/tau tau-cargo-crap --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-cargo-crap .claude/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .claude/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crapType 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-cargo-crap -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpc/tau tau-cargo-crap --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-cargo-crap .agents/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .agents/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crap -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpc/tau tau-cargo-crap --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-cargo-crap .cursor/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .cursor/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crap--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-cargo-crap -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpc/tau tau-cargo-crap --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-cargo-crap .gemini/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .gemini/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crapInstalls 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-cargo-crap -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-cargo-crap .github/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .github/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crap -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-cargo-crap --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-cargo-crap .opencode/skills/tau-cargo-crap && 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-cargo-crap" agent skill from https://github.com/dpc/tau/tree/master/.agents/skills/tau-cargo-crap into .opencode/skills/tau-cargo-crap/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tau-cargo-crap", 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-cargo-crap- GitHub stars
- 104
- Token cost
- ~1.2k tokens
- SKILL.md length
- 538 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- MPL-2.0
At a glance
A skill your agent uses when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex…
- CrapReport checks fail in Tau
- SKILL.md covers Fast diagnosis, Duplicate inventory, Current CI model and cargo-crap pitfalls, plus 2 more sections
- Calls nix and cargo
- Before changing the cargo-crap gates
What it does
Tau Cargo Crap is an agent skill from dpc/tau. Use this skill when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex code.
Its SKILL.md is about 1.2k 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 Development. 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
- CrapReport checks fail in Tau
- Before changing the cargo-crap gates
- Flagged complex code
Example prompts
- “/tau-cargo-crap”
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 Cargo Crap loads about 1.2k tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 538 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). 538 words, ~1,180 tokens.
Download SKILL.mdSave it as
.claude/skills/tau-cargo-crap/SKILL.md (or your agent's skills folder).- name
- tau-cargo-crap
- description
- Use this skill when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex code.
- user-invocable
- true
- advertise
- true
Tau cargo-crap
Use this when selfci check fails in the coverage/cargo-crap step or when working down CRAP-score hotspots.
Fast diagnosis
nix build -L .#ci.testsCcov
nix build -L .#ci.crapAbsolute
nix build -L .#ci.crapReport -o result-crap-report
sed -n '1,120p' result-crap-report/cargo-crap.md.#ci.crapReport is the non-blocking inventory report. .#ci.crapAbsolute is
the blocking gate; .#ci.crap preserves the aggregate entry point used by
selfci.
Duplicate inventory
nix build -L .#ci.crapDuplicates -o result-crap-duplicates
sed -n '1,100p' result-crap-duplicates/duplicates.txtSelfCI builds this source-only report even without TAU_CI_FULL=true. Its
duplicates.txt and duplicates.json contain candidate pairs, not a
duplicate-count gate. The Nix build fails if analysis fails, but a nonzero pair
count does not fail CI. Report paths are relative to the repository root.
For a local run without Nix output, use the pinned
cargo crap --workspace --duplicates --top 0 --format human with the same
shared defaults in .cargo-crap.toml; --top 0 hides meaningless CRAP scores
when no LCOV is supplied, without filtering duplicate pairs. The human
report's No functions found. refers to that suppressed CRAP table; read the
separate duplicate candidates section below it.
The inventory skips root-level Cargo test/bench/example directories and
src/**/tests/, src/**/tests.rs, and src/**/*_tests.rs files. It keeps
production files, including their ordinary helpers; #[cfg(test)] modules
are skipped by cargo-crap itself. Treat matches as leads for inspecting both
functions and their callers, not refactoring instructions: renamed enum
accessors, trait implementations, and macro-heavy bodies often share structure
without sharing behavior. To investigate one area, rerun
cargo crap -p <crate> --duplicates --top 0 with the same exclusions. Do not enable
[duplicates] globally: the Markdown debt report and GitHub gate cannot
display pairs. Do not enable TypeSafe triage; it would send function bodies
outside the project.
Current CI model
- The blocking gates use LCOV from the Nix coverage derivation, not a local
cargo llvm-covrun. .#ci.crapAbsolutefails current entries above the severe threshold with--fail-above..#ci.crapis the aggregate/selfci compatibility output for the absolute gate.- The absolute gate uses
.cargo-crap.toml's threshold of 400 with--min 100. - The Markdown debt report shows uncovered instrumented line ranges; they suggest where to add tests but do not measure assertion quality.
- Do not “fix” failures by raising the threshold. Refactor/decompose flagged code or add meaningful coverage.
Show full SKILL.md (207 more words)Show less
cargo-crap pitfalls
- The absolute gate intentionally has no baseline or exceptions: every measured production function must remain at or below the configured threshold.
--minfilters which current entries cargo-crap evaluates and reports; keep it low enough that every function capable of exceeding the absolute limit is included.- Tau configures
tests/**,benches/**,examples/**,**/tests/**,**/tests.rs, and**/*_tests.rsas shared default exclusions for production-code CRAP gates and inventories. External#[cfg(test)]modules need path exclusions because the per-file scan cannot see parent attributes. Pass--no-default-excludesonly for one-off investigations that need those directories.
Refactoring flagged code
For code fixes, preserve behavior first and extract coherent semantic operations with focused tests, not arbitrary match fragments. A zero-coverage function needs cyclomatic complexity below 20 to stay under the absolute score of 400, so extraction without tests may just move the hotspot. Prefer adding regression tests for behavior you touch.
Validation
treefmt
nix build -L .#ci.crapAbsolute
nix build -L .#ci.crap
selfci checkselfci check skips the expensive LLVM coverage and cargo-crap lane by
default. Set TAU_CI_FULL=true when a maintainer needs that full local CI
lane, including its debt inventory and blocking absolute gate:
TAU_CI_FULL=true selfci check --candidate <change-id>Do not add a baseline for functions under the limit. A baseline is only appropriate as an explicitly approved, temporary whitelist of pre-existing above-limit violations, and such exceptions may only shrink.
© 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-cargo-crap of dpc/tau.
Open the folder on GitHubat commit d2e1955
Compare with similar skills
Tau Cargo Crap 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 Cargo Crap this skilldpc/tau | 104 | — | ~1.2k | Automated safety check: Pass | MPL-2.0 | |
| Vercel Composition Patternssupabase/supabase | 111k | 59 repos | ~726 | Automated safety check: Pass | MIT | |
| Finishing a Development Branchobra/superpowers | 296k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 25 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| PR Babysitteropeninterpreter/openinterpreter | 69k | 3 repos | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT |
Similar skills
- Official
Finishing a Development Branch
obra/superpowers
Walks the last step of a branch: confirm tests pass, detect the git environment, ask how to integrate, carry out your choice and clean up the worktree.
Typescript Advanced Types
rolling-scopes/rsschool-app
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
PR Babysitter
openinterpreter/openinterpreter
Watches an open GitHub pull request until it merges, handling review comments, diagnosing CI failures and retrying flaky checks along the way.
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
Greploop
onyx-dot-app/onyx
Iteratively improves a PR (GitHub), MR (GitLab), or shelved changelist (Perforce) until Greptile gives it a 5/5 confidence score with zero unresolved comments.
More from dpc/tau
All 15 skills in this repoTau Papercut Triage
dpc/tau
A skill your agent uses when asked to "triage papercuts", review clanker-reported problems, or analyze and clear tau dev papercut reports.
Tau Tool Verification
dpc/tau
A skill your agent uses when asked to verify Tau harness tools or tool output behavior, especially read, edit, shell/shellcommand, line-oriented output, truncation, metadata headers, UTF-8 handling…
A skill your agent uses when verifying Tau file and command tools: read, edit, replace, applypatch, shell, or shellcommand, including ranges, UTF-8, truncation, diffs, timeouts, mutation safety, and…
Preview Site
dpc/tau
A skill your agent uses when changing or reviewing Tau's static site under site/ and needing visual verification of layout, spacing, colors, alignment, desktop rendering, mobile rendering, or…
Tau Agent Tracing
dpc/tau
A skill your agent uses when tracing or auditing Tau agent execution, including provider and cache cost, tool/background/wait latency, outer turns, compaction, delegated workflows, or performance…
A skill your agent uses when verifying Tau agentstart, message, or agentwatch coordination, including routing, validation, interruption, notification formatting, watch lifecycle, and deduplication.
Related
Categories
Questions about Tau Cargo Crap
What does Tau Cargo Crap do?
A skill your agent uses when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex…. Tau Cargo Crap is an agent skill from dpc/tau. Use this skill when selfci, Nix CI, coverage, cargo-crap, CRAP-score, crapAbsolute, or crapReport checks fail in Tau, or before changing the cargo-crap gates, thresholds, or flagged complex code.
When should I use Tau Cargo Crap?
Tau Cargo Crap fits situations like: crapReport checks fail in Tau; before changing the cargo-crap gates; flagged complex code.
How do I install Tau Cargo Crap in Claude Code?
Run `npx skills add dpc/tau --skill tau-cargo-crap -a claude-code`. Or copy the skill folder (.agents/skills/tau-cargo-crap in dpc/tau) into .claude/skills/tau-cargo-crap in your project. Claude Code loads it when a task matches its description.
How do I install Tau Cargo Crap in Codex?
Run `npx skills add dpc/tau --skill tau-cargo-crap -a codex`. Or copy the skill folder (.agents/skills/tau-cargo-crap in dpc/tau) into .agents/skills/tau-cargo-crap in your project. Codex loads it when a task matches its description.
Can I use Tau Cargo Crap 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-cargo-crap -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-cargo-crap, .gemini/skills/tau-cargo-crap, .github/skills/tau-cargo-crap and .opencode/skills/tau-cargo-crap in your project.
What does Tau Cargo Crap need to run?
Going by SKILL.md and its folder, Tau Cargo Crap needs the command-line tools its instructions call (nix and cargo).
Does Tau Cargo Crap 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 Cargo Crap 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 Cargo Crap use?
Tau Cargo Crap 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 Cargo Crap use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Cargo Crap?
Skills that share tags, products or a category with Tau Cargo Crap: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 296k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tau Cargo Crap?
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.