lean-tactic-select

To choose a tactic when a Lean 4 proof stalls, classify the current goal shape—such as equality, conjunction, or universal quantification—and select a prioritized tactic matching that structure to reduce the search space.

For an equality goal in Lean 4, tactic selection involves applying structural classification to propose candidates like reflexivity or rewriting, tailored to the observed goal shape to progress the proof.

Yes, you can get tactic recommendations for universal quantification goals in Lean by analyzing the goal shape and returning a structured list of prioritized tactics, such as introducing variables.

The best way to plan Lean proof tactics for disjunction and induction goals is to classify the goal shape and apply prioritized tactic candidates designed for those specific common forms.

You do not need the entire proof state; this tactic selection process requires only a description of the current goal as input to generate a structured list of tailored tactic recommendations.

Lean tactic selection on arithmetic goals may stall if the goal shape is not properly classified; applying the correct arithmetic tactic requires matching the observed structure to a prioritized candidate.