sipi.bot — Spend Firewall for AI Agents

Pre-spend firewall that approves, blocks, or flags every transaction an autonomous agent proposes against configurable spend rules (per-transaction caps, daily totals, velocity limits, merchant allowlists, category limits, time windows, approval thresholds) in under 5ms. 53/53 eval scenarios passing. MCP server via `python -m spendfirewall.mcp_server`. Also HTTP API and CLI. MIT.

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