# Ai Agent Mcp > Build/set up an AI meta-tooling project — a Claude Code skill, a subagent, an MCP server, or an agent app — from the user's grilled answers. Project-kit sub-skill loaded by new-project routing whenever someone wants to build a skill, write a subagent, stand up an MCP server, or ship an agent/LLM app. Chains skill-creator + claude-api, picks the right Claude model, and bakes in an eval plan so tri… - **Type:** Skill - **Install:** `agentstack add skill-skryx-l-a-project-kit-ai-agent-mcp` - **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior - **Seller:** [Skryx-L-A](https://agentstack.voostack.com/s/skryx-l-a) - **Installs:** 0 - **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml) - **Latest version:** 0.1.0 - **License:** MIT - **Upstream author:** [Skryx-L-A](https://github.com/Skryx-L-A) - **Source:** https://github.com/Skryx-L-A/project-kit/tree/master/skills/ai-agent-mcp ## Install ```sh agentstack add skill-skryx-l-a-project-kit-ai-agent-mcp ``` Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent. ## About # ai-agent-mcp — the agent/meta-tooling builder sub-skill ## What this sub-skill is for Standing up **tooling that Claude (or another agent) runs**: a Claude Code **skill** (a folder with SKILL.md), a **subagent** (a `.md` in `.claude/agents/` with frontmatter + system prompt), an **MCP server** that exposes tools/resources, or a small **agent app** built on the Anthropic SDK. This is the user's home turf — he builds skills and agents heavily — so the bar is high: correct triggering, validated tools, and evals that prove it. ## Mandatory grill-questions (fold into the Definition of Ready) Lock these before any code: - **Form factor** — skill vs. subagent vs. MCP server vs. agent app? They have different shapes, runtimes, and "done" bars. If unsure, decide from how it's invoked (Claude reads a SKILL.md → skill; Claude delegates a scoped job → subagent; a tool surface other clients call → MCP; a standalone program driving the model → agent app). - **Trigger surface** (skills/subagents) — what user phrasing or task shape must fire it, and what must NOT? The description line is the trigger; write it to match real intent, avoid false fires. - **Claude model** — chain `claude-api` for current model ids: `claude-opus-4-8` (most capable), `claude-sonnet-4-6`, `claude-haiku-4-5-20251001`, `claude-fable-5`. Default to the newest/most capable that fits cost+latency; justify the pick. - **Tools / permissions** — exactly which tools the skill/subagent/MCP gets, and the least-privilege set. For MCP: which tools/resources/prompts, their input schemas, and side-effect scope. - **Eval plan** — what "works" means as runnable checks (trigger-accuracy cases, golden tool calls, refusal cases). No eval plan = not Ready. - **Distribution** — local-only, committed into a repo's `.claude/`, or published/installable? - **State & secrets** — does it need state, files, or API keys? Where do keys live (never committed)? ## Project sub-agents to generate (into `.claude/agents/`) - **skill-author** *(delegate-by-default)* — authors/edits SKILL.md (frontmatter name+description + body) and subagent `.md` files to the kit's conventions; chains the `skill-creator` skill. - **eval-runner** *(delegate-by-default)* — builds and runs the eval suite (trigger accuracy, tool-call goldens, variance analysis), reports pass/fail honestly, blocks "done" on red. - **mcp-tool-designer** — designs MCP tool/resource schemas, names, and input validation; verifies each tool against the SDK reference and a smoke call. - **prompt-author** — writes/tightens the system prompt and description line; reduces false triggers. ## Tools / CLIs / MCP / skills needed Check in environment-readiness; offer install, never auto-install: - **Node 20+** (MCP TypeScript SDK: `@modelcontextprotocol/sdk`) and/or **Python 3.11+** (`mcp`, `anthropic`). `npx @modelcontextprotocol/inspector` to test an MCP server interactively. - **Anthropic SDK** — `npm i @anthropic-ai/sdk` or `pip install anthropic`; `ANTHROPIC_API_KEY` for agent apps (ask the user to paste it; never invent). - **CHAIN these GLOBAL skills automatically:** `skill-creator` (author skills/subagents + run/measure evals), `claude-api` (model ids, params, tool-use, MCP, caching — read it before touching any model id or LLM behaviour), `update-config` (wire skills/MCP/hooks into settings.json), `code-review` + `verify` before "done". Use `cli-anything` if the agent app needs to drive a GUI tool headlessly. - **MCP to chain:** the kit's own MCP servers as live references — e.g. `n8n` (`get_sdk_reference`), `claude-in-chrome` / `playwright`, `Supabase` — to study real tool-surface design. ## File / asset nudges (on top of the base set) Beyond CLAUDE.md, PROJEKT_.md, TASKS.md, DONE.md, README, `.claude/`: - **Skill:** `SKILL.md` (frontmatter + body), optional `references/`, `scripts/`, `assets/`. - **Subagent:** `.claude/agents/.md` (frontmatter `name`, `description`, `tools` + system prompt). - **MCP server:** `src/server.ts` (or `server.py`), tool/resource definitions, `package.json` / `pyproject.toml`, a `mcp.json` / install snippet, and `.mcp.json` registration example. - **Agent app:** `src/agent.*`, a tool registry, a run loop, `.env.example` (keys, never the real `.env`). - `evals/` — eval cases + a runner + a results log; this is non-optional here. - `examples/` — sample invocations / transcripts showing the intended trigger and output. ## Stack defaults & done-bar **Default stack:** skill/subagent = plain Markdown to kit conventions. MCP server = TypeScript on the `@modelcontextprotocol/sdk` (Python `mcp` if the surrounding code is Python). Agent app = `@anthropic-ai/sdk` with the newest capable model (default `claude-opus-4-8`, drop to `claude-sonnet-4-6` for cost/latency), tool-use loop, prompt caching where it pays. Evals via `skill-creator`'s harness. **"Finished/working" means** (checkable bar): - **Skill/subagent:** triggers on the intended phrasing and stays quiet on near-misses (eval trigger-accuracy passes); frontmatter valid; body follows kit format. - **MCP server:** starts; every tool validates against its schema and returns a correct smoke-test result in the Inspector; resources/prompts resolve; registration snippet works in a real client. - **Agent app:** runs the loop end-to-end against the live API, calls tools correctly, handles errors/refusals. - **Evals pass** (trigger accuracy + tool-call goldens + refusal cases) and are committed. - `code-review` + `verify` clean; README shows install + one real example. ## Guardrails - **Evals are the gate** — "it triggered once for me" is not done; prove it with the suite. - **Least privilege** — give a skill/subagent/MCP only the tools it needs; document why each is granted. - **Never hardcode or guess model ids/pricing/params** — read `claude-api`; default to the newest capable model. - **Secrets never committed** — `.env.example` only; ask the user to supply real keys. - **No emojis in any app/tool UI or output** (user's standing rule) — typographic symbols only. - **Honest descriptions** — the description line must reflect what the tool actually does and fires on; no over-broad triggers that hijack unrelated requests. - **Commits under the user's name only (Skryx-L-A); never add Claude as co-author.** ## Source & license This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code. - **Author:** [Skryx-L-A](https://github.com/Skryx-L-A) - **Source:** [Skryx-L-A/project-kit](https://github.com/Skryx-L-A/project-kit) - **License:** MIT Install and usage instructions live in the source repository linked above. ## Pricing - **Free** — Free ## Security capabilities Automated source analysis of v0.1.0 — what this tool can access: - **Network access:** no - **Filesystem access:** no - **Shell / process execution:** no - **Environment & secrets:** yes - **Dynamic code execution:** no *"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.* ## Versions - **0.1.0** — security scan: passed — Imported from the upstream source. ## Links - Listing page: https://agentstack.voostack.com/l/skill-skryx-l-a-project-kit-ai-agent-mcp - Seller: https://agentstack.voostack.com/s/skryx-l-a - Browse the marketplace: https://agentstack.voostack.com/browse --- Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.