My Theory on Today's action
Safe Harbor Statement - This is purely my idea. No officer - Government or Military gave me any ideas
Every time India applies disproportionate force, Pakistan tries to hit back. Every time India tries to change the rules, Pakistan tries to impose heavy costs. Pakistan has a doctrine of sorts to prevent India from going all Israel on them. It calls for a mixture of low level attacks, BAT strikes, heavy firings on LoCs and finally Nuclear threats. The idea is to keep India on the defensive.
Going back all the way to the attack on the Ashok listening post, it was preceded by an Indian attack in Chamb. Why is this relevant? Pakistan came all guns blazing today to get back at us. It was a push to even the score.
My theory is
Either India pushed back the LoC in the last few days and the details are not out yet.
Or India conducted a limited strike again.
Why? Pakistan brings in Heavy Artillery and of late ATGMs when India hurts it during the regular shelling duels. It never crosses the line in force for a blatant attack. Something tipped them over today. Something big enough that they tried this attack on a border that would be on high alert and obviously angry at them given the events of the last few weeks. You dont hit an alert angry enemy. You do the opposite, unless you are reacting to a grave provocation.
To sum it up in the late Mr. Parrikar's words - Pakistan ko zarur mirchi lagi hai, wo bhi Andhra ki.