diff --git a/docker/agents/entrypoint.sh b/docker/agents/entrypoint.sh
index a0701d1..985dd39 100644
--- a/docker/agents/entrypoint.sh
+++ b/docker/agents/entrypoint.sh
@@ -122,7 +122,7 @@ log "Claude CLI: $(claude --version 2>&1 || true)"
 # auth method is active so operators can debug 401s.
 if [ -n "${ANTHROPIC_API_KEY:-}" ]; then
   log "Auth: ANTHROPIC_API_KEY is set — using API key (no OAuth rotation)"
-elif [ -f "${CLAUDE_CONFIG_DIR:-/home/agent/.claude}/credentials.json" ]; then
+elif [ -f "${CLAUDE_CONFIG_DIR:-/home/agent/.claude}/.credentials.json" ]; then
   log "Auth: OAuth credentials mounted from host (${CLAUDE_CONFIG_DIR:-~/.claude})"
 else
   log "WARNING: No ANTHROPIC_API_KEY and no OAuth credentials found."