About Fable Mode
Fable Mode is an MCP server published by REX-codebase in the Finance category: mechanical write gates, evidence receipts, and adversarial review for AI coding agents.
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Install
uvx
uvx fable-enginepip
pip install fable-engineThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
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Releases
v1.3.9v1.3.9 · 18 Sep 2026v1.3.9 - Deeper measured evolution, safe web research, and auto-updater idempotence Evidence-fed evolution loops are bounded and externally gated: `evolve_until_stable` stops within max generations or stagnation patience, records…
v1.3.8v1.3.8 · 18 Sep 2026v1.3.8 - Unified MCP and sandbox agent installation `fable-mode setup` installs the full 40-file skill and prints both usage routes. Native MCP agents run the normal stdio MCP server; shell-only agents use `fable-mode call` over bounded…
v1.3.7v1.3.7 · 17 Sep 2026Fable Engine v1.3.7 Fix Windows support for the sandboxed red-team executor: Windows select() rejects pipe handles (WinError 10038); the reader now falls back to a thread on OSError, so sandboxed code review handshakes on Windows. CI…
v1.3.6v1.3.6 · 17 Sep 2026Fable Engine v1.3.6 Sandbox executor for red-team code review: source-string targets now run inside a resource-limited subprocess worker (rlimits, per-call timeout with kill+respawn) instead of being refused. `red_team_code_review` and…
v1.3.5Fable Mode v1.3.5 · 16 Sep 2026MCP tool quality release Rewrites every previously B/C-rated browser tool description around its real behavior, prerequisites, state changes, no-op/error cases, results, and sibling-tool selection. Replaces the overloaded `fable_session`…