You (or Claude Desktop)
        │
        │  job_description + resume_content
        ▼
  tailor_resume tool  ←── this server
        │
        │  calls Claude Sonnet with a constrained system prompt
        ▼
  structured JSON response
        │
        ├── jd_keywords        top 3–5 repeated JD terms
        ├── gap_summary        skills JD wants that aren't in your resume
        ├── bullet_changes     before/after for each modified bullet only
        ├── skills_changes     before/after for skills section (or null)
        ├── guardrails_report  model's self-audit (new claims, removed metrics)
        └── validation         5 deterministic checks run after the LLM response

server.py           MCP server — exposes hello and tailor_resume tools
client.py           Standalone MCP client (learning exercise / smoke test)
prompts.py          System prompt that constrains Claude's output
guardrails.py       Post-LLM validation (5 deterministic safety checks)
test_guardrails.py  Offline unit tests for the guardrails module
pyproject.toml      Project config and dependencies
.env                Your ANTHROPIC_API_KEY (never committed)

git clone <your-repo-url>
cd MCP_push1
uv sync

ANTHROPIC_API_KEY=sk-ant-...

uv run mcp dev server.py

uv run python test_guardrails.py

{
  "mcpServers": {
    "resume-tailor": {
      "command": "/Users/your-username/.local/bin/uv",
      "args": [
        "--directory",
        "/path/to/MCP_push1",
        "run",
        "server.py"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "sk-ant-..."
      }
    }
  }
}

{
  "jd_keywords": ["Python", "ETL", "SQL"],
  "gap_summary": "No evidence of distributed systems experience.",
  "bullet_changes": [
    {
      "section": "Acme Corp / Data Engineer",
      "before": "\\resumeItem{Built pipeline tooling...}",
      "after":  "\\resumeItem{Built data pipeline tooling...}",
      "rationale": "Targets 'ETL' keyword — no new facts added."
    }
  ],
  "skills_changes": { "before": null, "after": null, "rationale": null },
  "guardrails_report": {
    "new_claims": [],
    "removed_metrics": [],
    "formatting_changes": []
  },
  "validation": {
    "passed": true,
    "issues": []
  }
}