From c0826e1a3647f881e470240071b06cf7dfe09868 Mon Sep 17 00:00:00 2001
From: Ryan Malloy <ryan@supported.systems>
Date: Mon, 23 Feb 2026 19:45:08 -0700
Subject: [PATCH] Set MPLCONFIGDIR for matplotlib in nobody container

The nobody user has no writable home directory, so matplotlib falls
back to creating a temporary cache dir on every import. Setting
MPLCONFIGDIR to /tmp/matplotlib gives it a stable writable path.
---
 Dockerfile.mcp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dockerfile.mcp b/Dockerfile.mcp
index 43f5dfb..5ca7746 100644
--- a/Dockerfile.mcp
+++ b/Dockerfile.mcp
@@ -14,6 +14,7 @@ WORKDIR /app
 
 ENV UV_COMPILE_BYTECODE=1
 ENV PATH="/app/.venv/bin:$PATH"
+ENV MPLCONFIGDIR=/tmp/matplotlib
 
 COPY --from=deps /app/.venv /app/.venv
 COPY src/ src/