
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given an ellipse $C$: $\dfrac {x^{2}}{a^{2}}+ \dfrac {y^{2}}{b^{2}}=1(a > b > 0)$ with a minor axis length of $2$ and an eccentricity of $\dfrac {\sqrt {2}}{2}$.  
$(1)$ Find the equation of the ellipse $C$;  
$(2)$ If a moving line $l$ passes through the point $M(-2,0)$ and intersects the ellipse $C$ at points $P$ and $Q$, with $O$ being the origin, find the maximum area of $\triangle OPQ$.

Present the answer in LaTex format: \boxed{Your answer}
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