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adversary-gate-mcp

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AdversaryGate as an MCP server: a fail-closed merge gate an agent calls before saying done

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Direct dependencies1From release 3.0.14

Last observed20 Oct, 20:03 UTC

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Version 3.0.14 documentation

adversary-gate-mcp

The MCP server of AdversaryGate, packaged so it runs with one command:

uvx adversary-gate-mcp

It is the same server as pip install "adversary-gate[mcp]" followed by adversary-gate-mcp; this package ships no code of its own and pins adversary-gate[mcp] at its own version.

AdversaryGate runs your tests on the baseline and on the patch and answers MERGE, BLOCK or INCONCLUSIVE. The server gives a coding agent two tools, verify_repo and gate_policy, so it can check its change before saying it is done. The agent only names evidence; the operator sets the rest through the environment:

Variable	What it sets
`ADVERSARY_GATE_BASE_REF`	the baseline (e.g. `origin/main`). Unset, the agent may pick it, and whoever picks the baseline picks the oracle. Pinning names the baseline; it is not a defence against an agent that can write the repository's `.git` (its refs, objects or configuration) — run such an agent where it cannot, as with any code that runs with your privileges.
`ADVERSARY_GATE_PYTHON`	the interpreter that runs the tests; one the agent cannot write to
`ADVERSARY_GATE_POLICY`	extra gate flags; evidence flags are refused

Measurement covers Python/pytest today; other languages get INCONCLUSIVE, not a false MERGE. Documentation, limits and the bug ledger: https://github.com/Sanflow10/adversary-gate.

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Version	Published	Direct dependencies	Open version
3.0.14	19 Oct 2026	1

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sanflow10/adversary-gate

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