Is Aw1 Circuit Breaker free?

Aw1 Circuit Breaker is listed as Open Source. Check https://github.com/MvikManners/aw1-circuit-breaker for the current plan limits, as vendors change pricing frequently.

Aw1 Circuit Breaker

Q: What is Aw1 Circuit Breaker?

Aw1 Circuit Breaker is a code AI tool listed on Use AI Tools. Aw1 Circuit Breaker is a deterministic AST security circuit breaker for autonomous AI agents, tool dispatch pipelines and MCP servers, with the project quoting sub-0.2ms evaluation. Rather than asking a model to judge whether an action is safe, it inspects the syntax tree of the action and blocks it before dispatch.

Q: What is Aw1 Circuit Breaker best for?

Aw1 Circuit Breaker is commonly used for Blocking unsafe agent actions deterministically, Guarding MCP tool dispatch, Teams that do not trust model-based safety judgement. It supports English.

Code⚡ Advanced✅ Global access

Blocking unsafe agent actions deterministicallyGuarding MCP tool dispatchTeams that do not trust model-based safety judgement

Open SourceEnglish

Aw1 Circuit Breaker is a deterministic AST security circuit breaker for autonomous AI agents, tool dispatch pipelines and MCP servers, with the project quoting sub-0.2ms evaluation. Rather than asking a model to judge whether an action is safe, it inspects the syntax tree of the action and blocks it before dispatch.

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🎯 Real-World Use Cases

Break the circuit

Stop a dangerous action at dispatch time instead of after the tool runs.

Guard tool pipelines

Insert the breaker into a tool dispatch pipeline without a model in the loop.

Keep latency flat

Rely on sub-millisecond AST evaluation rather than an extra model call.

⚖️ Honest Review

✅ Pros

+Deterministic rules, so the same input always gets the same verdict
+No model call in the decision path
+Published on PyPI for Python 3.10 through 3.13

⚠️ Cons

−Covers what the AST rules encode, not every possible unsafe behaviour
−Python-focused despite the low-level positioning

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CodeOct 24, 2026