
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 that the function $f(x) (x \in \mathbb{R})$ satisfies $f(x + \pi) = f(x) + \sin x$. When $0 \leqslant x < \pi$, $f(x) = 0$, find $f\left(\frac{23 \pi}{6}\right)$.

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