fix(explore): integrate nanoregex for correct regex matching (#454)

build.zig

@@ -31,8 +31,14 @@ pub fn build(b: *std.Build) void {
     // ── mcp-zig dependency ──
     const mcp_dep = b.dependency("mcp_zig", .{});
     exe.root_module.addImport("mcp", mcp_dep.module("mcp"));
+
+    // ── nanoregex dependency ──
+    const nanoregex_dep = b.dependency("nanoregex", .{});
+    exe.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
+
     b.installArtifact(exe);
 
+
     // ── macOS codesign (ad-hoc by default; configurable for release builds) ──
     if (target.result.os.tag == .macos and builtin.os.tag == .macos) {
         const codesign = b.addSystemCommand(&.{ "codesign", "-f", "-s", codesign_identity });
@@ -58,6 +64,7 @@ pub fn build(b: *std.Build) void {
         }),
     });
     tests.root_module.addImport("mcp", mcp_dep.module("mcp"));
+    tests.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
     if (test_filter) |f| {
         const filters = b.allocator.alloc([]const u8, 1) catch @panic("oom");
         filters[0] = f;
@@ -68,6 +75,7 @@ pub fn build(b: *std.Build) void {
     const tests_run = b.addRunArtifact(tests);
     test_step.dependOn(&tests_run.step);
 
+
     // ── Library tests (verify the module root compiles) ──
     const lib_tests = b.addTest(.{
         .root_module = b.createModule(.{
@@ -88,8 +96,10 @@ pub fn build(b: *std.Build) void {
             .link_libc = true,
         }),
     });
+    adversarial_tests.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
     test_step.dependOn(&b.addRunArtifact(adversarial_tests).step);
 
+
     // ── Benchmarks ──
     const bench = b.addExecutable(.{
         .name = "bench",
@@ -102,6 +112,7 @@ pub fn build(b: *std.Build) void {
     });
     const bench_run = b.addRunArtifact(bench);
     bench.root_module.addImport("mcp", mcp_dep.module("mcp"));
+    bench.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
     if (b.args) |args| bench_run.addArgs(args);
     const bench_step = b.step("bench", "Run benchmarks");
     bench_step.dependOn(&bench_run.step);
@@ -117,6 +128,7 @@ pub fn build(b: *std.Build) void {
         }),
     });
     benchmark.root_module.addImport("mcp", mcp_dep.module("mcp"));
+    benchmark.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
     const benchmark_run = b.addRunArtifact(benchmark);
     if (b.args) |args| benchmark_run.addArgs(args);
     const benchmark_step = b.step("benchmark", "Run repo benchmark (use -- --root /path/to/repo)");
@@ -137,6 +149,7 @@ pub fn build(b: *std.Build) void {
             .optimize = .ReleaseSmall,
         }),
     });
+    wasm.root_module.addImport("nanoregex", nanoregex_dep.module("nanoregex"));
     wasm.rdynamic = true;
     wasm.entry = .disabled;
 

build.zig.zon

@@ -8,6 +8,10 @@
             .url = "https://github.com/justrach/mcp-zig/archive/refs/heads/feature/7-zig-0-16-0-migration.tar.gz",
             .hash = "mcp_zig-0.2.0-_PilzNJkAQADzH2t3vqpd_nl_W0ta-gDaumXKttuPyBy",
         },
+        .nanoregex = .{
+            .url = "https://github.com/justrach/nanoregex/archive/refs/heads/main.tar.gz",
+            .hash = "nanoregex-0.0.1-EdkhcXoqAgC6HvjxEqNIedT0YWMRfouWk8dh4G5ZC2L9",
+        },
     },
     .paths = .{
         "src",