Run this command. See Claude Code MCP docs for more info.

claude mcp add --scope user --transport http cleanslice https://mcp.cleanslice.org/mcp

Remove --scope user to install for the current project only.

Tip: enforce MCP usage with CLAUDE.md

To make sure Claude Code always consults the CleanSlice MCP before writing any code, add the following to your project's CLAUDE.md:

## CleanSlice MCP — Required

Before writing or modifying any code you MUST consult the CleanSlice MCP:

1. Call `get-started` to load the core architecture rules.
2. Call `list-categories` to see available documentation areas.
3. Call `search` with at least 2 task-relevant queries covering:
   (a) core implementation details for the feature you are building,
   (b) edge cases, constraints, or standards that apply.
4. Call `read-doc` to read the full document when search snippets aren't enough.

Do NOT guess conventions — always verify against MCP results first.

This ensures the agent reads CleanSlice docs at the start of every task, not after the fact.

Optional: add a Stop hook as a safety net

To catch cases where the agent skips the MCP despite the CLAUDE.md instruction, add this to .claude/settings.json:

{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          {
            "type": "agent",
            "timeout": 180,
            "prompt": "You are a verification subagent. Your job: ensure the main Claude Code agent used the `cleanslice` MCP knowledge sufficiently and did not guess.\n\nContext JSON:\n$ARGUMENTS\n\nVerification requirements:\n1) Identify what the user asked for (deliverables + constraints) from the conversation/transcript in $ARGUMENTS.\n2) Verify the agent consulted the `cleanslice` MCP server for relevant knowledge BEFORE finalizing:\n   - Must call `cleanslice` \"get-started\" at least once (or equivalent) to confirm the server's purpose and usage.\n   - Must call \"list-categories\" to understand the available knowledge areas.\n   - Must call \"search\" with task-relevant queries (at least 2 searches) covering: (a) core implementation details, (b) edge cases / constraints.\n   - May call \"read-doc\" to get full document content when search snippets are insufficient.\n3) Validate coverage:\n   - If any required category is relevant but not checked, fail.\n   - If answers include specifics that are not supported by MCP results, fail.\n4) Output STRICT JSON only:\n   - If everything is verified: {\"ok\": true}\n   - If anything is missing/unsupported: {\"ok\": false, \"reason\": \"What is missing + exact MCP calls the main agent must run next (e.g., run list-categories, then search for X/Y, then update the solution).\"}\n\nImportant:\n- `cleanslice` tools will appear as MCP tools. Use whatever exact tool names are available in this environment (they follow the mcp__<server>__<tool> naming pattern).\n- Do not allow stopping until MCP-backed evidence is sufficient."
          }
        ]
      }
    ]
  }
}

Go to: Settings -> Cursor Settings -> MCP -> Add new global MCP server

Paste the following into your Cursor ~/.cursor/mcp.json file. You may also install in a specific project by creating .cursor/mcp.json in your project folder. See [Cursor MCP docs](https://docs.cursor.com/context/model-con

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