Agent Skills

agent-skills

58 Claude Code skills and 9 autonomous agents. Polyglot dev, web3, ZK, genomics, UI/UX, systems programming.

How skill loading works

This is probably your first question, so let's get it out of the way.

Skills are lazy. Claude Code reads the short trigger clause from each SKILL.md frontmatter -- the first few lines per skill -- and only pulls in the full skill content when the trigger matches your conversation. The sub-files (examples, checklists, reference tables) stay out of context until they're actually needed.

What's always present: ~2-4 lines of trigger description per skill. What's lazy: everything else. 58 skills at a few lines each is a small fraction of the context window. The heavy content -- sometimes hundreds of lines of domain-specific reference -- only loads when you're actually working in that domain.

So no, installing all 58 won't bloat your sessions. I.E. the noir ZK skill isn't eating tokens while you're reviewing a PR.

Skills

Each skill lives in skills// with a SKILL.md entry point.

Domain

| Skill | What it does | | --------------------------------------- | ---------------------------------------------------------------------------------------- | | claude-api | Anthropic SDK reference (Python, TS, Go, Elixir, Rust, Lua, cURL) | | droo-stack | Polyglot patterns (Elixir, TS, Go, Rust, C, Zig, Python, Lua, Shell, Noir, Chezmoi) | | raxol | Elixir TUI/agent framework (TEA agents, MCP, headless sessions) | | noir | ZK circuit design, Aztec contracts, constraint optimization | | solidity-auditor | Solidity dev standards, vulnerability taxonomy, Foundry-first audit | | zk-x-ray | Pre-audit briefing for ZK + EVM hybrids (Noir + Solidity), public-input parity check | | ethskills | Ethereum tooling, framework selection, EIP/ERC standards | | nix | Nix language, flakes, NixOS, Home Manager, packaging | | native-code | NIF development (C/Rust/Rustler), SIMD (Zig), BEAM native boundary | | ffmpeg-asm | ffmpeg upstream + integration: x86inc.asm, NEON + Apple M4 SME, HBD templating, dispatch, checkasm, upstream patch workflow | | coingecko | CoinGecko/GeckoTerminal API: prices, markets, DEX pools, trending tokens | | blockscout | Blockscout MCP: 16 tools for on-chain data across 8+ chains | | signoz | SigNoz MCP: ~41 tools for OTel metrics/traces/logs, alerts, and regen correlation | | web-asset-generator | Favicon, app icon, OG image, devicon generation and optimization | | cancer-predisposition-variant-analyst | Ultra-rare variant interpretation, mechanistic paradox resolution, ACMG/ClinGen evidence |

Workflow

| Skill | What it does | | ----------------------- | ----------------------------------------------------------------------- | | tdd | Test-driven development: vertical slices, mutation testing, polyglot | | code-review | PR review: blast radius, security scan, SOLID checks, 40-item checklist | | prd-to-plan | PRD -> phased tracer-bullet vertical slices (and optionally GitHub issues) | | focused-fix | 5-phase bug fix: SCOPE -> TRACE -> DIAGNOSE -> FIX -> VERIFY | | release | Conventional commits, semver bumping, changelog, readiness checks | | qa | Bug triage and issue creation; interactive QA with background explorer | | interface-designer | "Design It Twice" -- parallel sub-agents with divergent constraints | | ubiquitous-language | DDD glossary extraction, canonical terms | | design-ux | UI/UX design patterns, design tokens, accessibility, TUI aesthetics | | property-testing | Generative/property-based testing (Hypothesis, proptest, StreamData, fast-check) | | refactoring-strategy | Strangler fig, large renames, safe restructuring for polyglot codebases |

Infrastructure

| Skill | What it does | | ------------------------ | --------------------------------------------------------------- | | mcp-server-builder | OpenAPI -> MCP server scaffolding (Python FastMCP + TypeScript) | | ci-cd-pipeline-builder | Stack detection -> GitHub Actions/GitLab CI generation | | dependency-auditor | Multi-language vuln scanning + license compliance | | observability-designer | SLO/SLI design, burn rate alerting, dashboard generation | | database-designer | Schema analysis, ERD generation, index optimization | | performance-profiler | Polyglot profiling (Node/Python/Go/Elixir/Rust) | | git-guardrails | PreToolUse hooks to block dangerous git operations | | git-worktree-manager | Parallel dev with deterministic port allocation | | env-secrets-manager | Leak detection, rotation, pre-commit setup | | tech-debt-tracker | Debt scanning, cost-of-delay prioritization | | security-auditor | Security vulnerability scanning and compliance assessment | | playwright | Browser automation and e2e testing tooling (Python + TS) | | prepper | Pre-session project briefings (git, GitHub, CI, deps, recall) |

Meta

| Skill | What it does | | ---------------------- | ---------------------------------------------------------------------- | | polymath | Split-brain research: three-tier roster, polymath persona composition | | architect | ADR workflows, dependency classification, pattern detection | | agent-designer | Multi-agent architecture patterns, tool schemas, guardrails | | adversarial-reviewer | Three-persona devil's advocate review | | self-improving-agent | Auto-memory curation, pattern promotion lifecycle | | codebase-onboarding | Auto-generate onboarding docs, audience-aware | | rag-architect | RAG pipeline design: chunking, embedding, retrieval, evaluation | | llm-cost-optimizer | 7 optimization techniques in priority order | | digest | Multi-platform activity digest (18 sources + differential mode) | | recall | Knowledge base: query past decisions, patterns, gotchas | | autoresearch | Check experiment status, run iterations, view dashboards | | watchdog | Scan repos for stale PRs, failing CI, security advisories | | sentinel | Monitor on-chain contracts for anomalous transactions | | regen | Read Fluidify Regen incidents, extract SigNoz correlation keys | | patchbot | Scan and update outdated dependencies across ecosystems | | writing-voice | Writing voice calibration from studied authors, combinatorial blending | | skill-creator | Scaffold new skills with frontmatter, triggers, and sub-files |

Agents

Nine standalone tools, each with a Typer CLI, pydantic models, and a FastMCP server. They run independently of the skill system -- install them separately, talk to them over MCP.

| Agent | What it does | MCP tools | | -------------- | -------------------------------------------------------------------------- | --------- | | digest | Multi-platform activity digest (18 sources, differential, structured views)| 7 | | recall | Knowledge capture and retrieval (SQLite + FTS5) | 8 | | scribe | Session insight extractor (writes to recall) | 3 | | autoresearch | Autonomous experiment runner (ML, Noir, Solidity) | 3 | | watchdog | Repo health monitor (PRs, CI, deps, advisories) | 2 | | prepper | Pre-session context builder (git, GitHub, deps, recall, sentinel) | 3 | | sentinel | On-chain contract monitor via Blockscout (11 chains) | 2 | | patchbot | Polyglot dependency updater (Elixir, Rust, Node, Go, Python) | 3 | | regen | Incident reader + SigNoz OTel correlation (Fluidify Regen) | 7 |

MCP integration

Each agent doubles as an MCP server. Add to ~/.mcp.json:

{
  "mcpServers": {
    "digest": { "command": "digest", "args": ["serve"] },
    "recall": { "command": "recall", "args": ["serve"] },
    "scribe": { "command": "scribe", "args": ["serve"] },
    "autoresearch": { "command": "autoresearch", "args": ["serve"] },
    "watchdog": { "command": "watchdog", "args": ["serve"] },
    "prepper": { "command": "prepper", "args": ["serve"] },
    "sentinel": { "command": "sentinel", "args": ["serve"] },
    "patchbot": { "command": "patchbot", "args": ["serve"] },
    "regen": { "command": "regen", "args": ["serve"] },
    "coingecko": { "url": "https://mcp.api.coingecko.com/mcp" }
  }
}

See [TODO.md](TODO.md) for the roadmap.

Install

Claude Code plugin

/plugin install agent-skills@DROOdotFOO/agent-skills

Or add the marketplace first:

/plugin marketplace add DROOdotFOO/agent-skills

npx

Pick individual skills:

npx skills@latest add DROOdotFOO/agent-skills/tdd
npx skills@latest add DROOdotFOO/agent-skills/code-review
npx skills@latest add DROOdotFOO/agent-skills/polymath

Or grab everything:

npx skills@latest add DROOdotFOO/agent-skills

chezmoi

Add to .chezmoiexternal.toml:

[".agents/skills"]
    type = "archive"
    url = "https://github.com/DROOdotFOO/agent-skills/archive/main.tar.gz"
    stripComponents = 2
    include = ["*/skills/**"]
    refreshPeriod = "168h"

Then symlink into Claude Code:

mkdir -p ~/.claude/skills
for d in ~/.agents/skills/*/; do
    ln -sf "../../.agents/skills/$(basename "$d")" ~/.claude/skills/
done

Manual

git clone https://github.com/DROOdotFOO/agent-skills.git ~/.agents/skills-repo
ln -s ~/.agents/skills-repo/skills ~/.agents/skills

Agents

Each agent installs independently:

cd agents/ && pip install -e .

Lint

./scripts/skills-lint.sh

Checks frontmatter, trigger clauses, file references, and cross-skill links.

License

MIT

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: DROOdotFOO
• Source: DROOdotFOO/agent-skills
• License: MIT
• Homepage: https://droo.foo/

Install and usage instructions live in the source repository linked above.