How do you build intuition for spotting unsafe opcode compositions early?

I’ve been running opcode composition experiments (e.g. CAT+CSFS, IK+CSFS) on signet.

Related: #130613, #130598, Delving thread

In several cases, the script validates correctly, but still feels structurally unsafe (e.g. replay, cross-UTXO reuse, weak binding).

My question:

How do experienced developers recognize these issues early, before they turn into real vulnerabilities?

In particular, how do you reason about whether a construction is "too general" or insufficiently bound?



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