Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
eba8bf3347
This PR adds infrastructure for the upcoming `grind` tactic mode, which will be similar to the `conv` mode. The goal is to extend `grind` from a terminal tactic into an interactive mode: `grind => …`. It will serve as the foundation for `ungrind`, the process of converting an expensive (and potentially fragile) `grind` proof into a robust script. This mode will include tactics for expensive reasoning steps such as cutsat model-based search, Gröbner basis computation, E-matching, case splits, and more. It will also provide robust, succinct references to facts and terms: labels, structural matches, and anchors (e.g., `#abcd`). |
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