
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 positive arithmetic progression $\{a_{n}\}$, $a_1=\frac{1}{2}$, $a_{n+1}^2=a_n^2=2n$. Find:<br/>$(1)$ The general term formula of the sequence $\{a_{n}\}$;<br/>$(2)$ Let $b_n=\frac{1}{a_na_{n+1}$. Find the sum of the first $n$ terms of the sequence $\{b_{n}\}$ denoted as $S_{n}$.

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