[Mlir-commits] [llvm] [mlir] [mlir] Add mlir-opt-repl: interactive MLIR pass pipeline explorer and MCP server (PR #203796)

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``````````bash
darker --check --diff -r origin/main...HEAD mlir/test/mlir-opt-repl/conftest.py mlir/test/mlir-opt-repl/test_cli_and_edge_cases.py mlir/test/mlir-opt-repl/test_mcp.py mlir/test/mlir-opt-repl/test_repl.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/__init__.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/__main__.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/diff.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/engine.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/mcp.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/render.py mlir/tools/mlir-opt-repl/src/mlir_opt_repl/repl.py
``````````

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``````````diff
--- tools/mlir-opt-repl/src/mlir_opt_repl/repl.py	2026-06-14 22:02:58.000000 +0000
+++ tools/mlir-opt-repl/src/mlir_opt_repl/repl.py	2026-06-14 22:04:34.313568 +0000
@@ -175,11 +175,12 @@
                 print(f"  {BOLD}--{p['name']}{RESET}: {DIM}{p['description']}{RESET}")
             if not all_passes:
                 print(f"{DIM}(no passes matched){RESET}")
 
         elif cmd == "help":
-            print(f"""
+            print(
+                f"""
 {BOLD}Commands:{RESET}
   {CYAN}load <file.mlir>{RESET}    Load MLIR from a file
   {CYAN}load -{RESET}              Load MLIR from stdin (blank line to finish)
   {CYAN}run <passes...>{RESET}     Apply passes to current IR
   {CYAN}ir{RESET}                  Show current IR
@@ -188,9 +189,10 @@
   {CYAN}sbs [a b]{RESET}           Side-by-side diff (last step, or between indices a and b)
   {CYAN}rewind [N]{RESET}          Undo last N steps (default 1)
   {CYAN}reset{RESET}               Clear all state
   {CYAN}passes [filter]{RESET}     List available passes
   {CYAN}quit{RESET}                Exit
-""")
+"""
+            )
 
         else:
             print(f"{RED}Unknown command: {cmd}. Type 'help' for usage.{RESET}")

``````````

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https://github.com/llvm/llvm-project/pull/203796