
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
In the ellipse \(\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}=1\) where \(a > b > 0\), let the left focus be \(F\), the right vertex be \(A\), and the endpoint above the minor axis be \(B\). If the eccentricity of the ellipse is \(\frac{\sqrt{5}-1}{2}\), determine \(\angle A B F\).

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