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README.md

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+---
+language:
+- en
+license: mit
+tags:
+- ai-agents
+- guardrails
+- llm-security
+- tool-calling
+- agent-verification
+- mcp
+- local-ai
+---
+
+# AffixIO Agent Guard — Python mirror (Model repo)
+
+Python mirror of the npm `affixio-agent-guard` policy: deterministic,
+fail-closed check of one tool call + local JSON receipt. Zero network,
+zero keys. Receipts are **local simulations, not cryptographic
+attestations** — same honest contract as the npm package.
+
+```bash
+npm install affixio-agent-guard   # Node version
+python test_guard.py              # this Python mirror
+```
+
+```python
+from guard import check_tool_call
+d = check_tool_call({"tool": "payments.create", "host": "api.example.com",
+                     "amount": 120, "args": {"customer": "cust_42"}})
+print(d["allowed"], d["reason"])  # True allowed by policy
+```
+
+Policy keys: `allowedTools`, `allowedHosts`, `maxAmount`,
+`blockedSecrets`, `requireApprovalFor` (fail-closed: denied unless you
+build your own approval step).
+
+## Version
+
+- v1.0.0 — Python mirror of guard v0.1.0 logic. See CHANGELOG.md.
+
+## Links
+
+- npm guard: https://www.npmjs.com/package/affixio-agent-guard
+- Product: https://www.affix-io.com
+- SDK: https://www.npmjs.com/package/affixio
+- API docs: https://www.affix-io.com/docs/
+- Agentic Pay Kit: https://www.affix-io.com/agent-trust/
+
+Keywords: AI agents, guardrails, LLM security, MCP, agent verification,
+tool calling, local AI.