bazel: document Windows test tag exceptions (#28598)

codex-rs/agent-identity/BUILD.bazel

@@ -3,6 +3,9 @@ load("//:defs.bzl", "codex_rust_crate")
 codex_rust_crate(
     name = "agent-identity",
     crate_name = "codex_agent_identity",
+    # This test is short once running, but it hit the 60s Windows timeout when
+    # several freshly invalidated tests launched together. Serialize local runs
+    # to avoid runner startup contention while keeping the small test size.
     test_tags_by_target = {
         "agent-identity-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/apply-patch/BUILD.bazel

@@ -6,6 +6,9 @@ codex_rust_crate(
     test_sizes = {
         "apply-patch-all-test-windows-cross": "medium",
     },
+    # Cold Windows runs take about 54s, while remote results have reported
+    # about 1s and made the medium budget look oversized. Run it alone and
+    # bypass remote test-result caching so CI measures the cold runtime.
     test_tags_by_target = {
         "apply-patch-all-test-windows-cross": [
             "exclusive-if-local",

codex-rs/file-system/BUILD.bazel

@@ -3,6 +3,9 @@ load("//:defs.bzl", "codex_rust_crate")
 codex_rust_crate(
     name = "file-system",
     crate_name = "codex_file_system",
+    # This test is short once running, but it hit the 60s Windows timeout when
+    # several freshly invalidated tests launched together. Serialize local runs
+    # to avoid runner startup contention while keeping the small test size.
     test_tags_by_target = {
         "file-system-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/memories/read/BUILD.bazel

@@ -3,6 +3,9 @@ load("//:defs.bzl", "codex_rust_crate")
 codex_rust_crate(
     name = "read",
     crate_name = "codex_memories_read",
+    # This test is short once running, but it hit the 60s Windows timeout when
+    # several freshly invalidated tests launched together. Serialize local runs
+    # to avoid runner startup contention while keeping the small test size.
     test_tags_by_target = {
         "read-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/secrets/BUILD.bazel

@@ -3,6 +3,9 @@ load("//:defs.bzl", "codex_rust_crate")
 codex_rust_crate(
     name = "secrets",
     crate_name = "codex_secrets",
+    # This test is short once running, but it hit the 60s Windows timeout when
+    # several freshly invalidated tests launched together. Serialize local runs
+    # to avoid runner startup contention while keeping the small test size.
     test_tags_by_target = {
         "secrets-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/state/BUILD.bazel

@@ -12,6 +12,9 @@ codex_rust_crate(
     test_sizes = {
         "state-unit-tests-windows-cross": "medium",
     },
+    # Cold Windows runs exceed the 60s short timeout, while remote results have
+    # reported about 15s and made the medium budget look oversized. Run it alone
+    # and bypass remote test-result caching so CI measures the cold runtime.
     test_tags_by_target = {
         "state-unit-tests-windows-cross": [
             "exclusive-if-local",

codex-rs/utils/approval-presets/BUILD.bazel

@@ -3,6 +3,9 @@ load("//:defs.bzl", "codex_rust_crate")
 codex_rust_crate(
     name = "approval-presets",
     crate_name = "codex_utils_approval_presets",
+    # This test is short once running, but it hit the 60s Windows timeout when
+    # several freshly invalidated tests launched together. Serialize local runs
+    # to avoid runner startup contention while keeping the small test size.
     test_tags_by_target = {
         "approval-presets-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/utils/rustls-provider/BUILD.bazel

@@ -6,6 +6,9 @@ codex_rust_crate(
     test_sizes = {
         "rustls-provider-preinstalled-test-windows-cross": "medium",
     },
+    # This unit test is short once running, but it hit the 60s Windows timeout
+    # when several freshly invalidated tests launched together. Serialize local
+    # runs to avoid runner startup contention while keeping its small size.
     test_tags_by_target = {
         "rustls-provider-unit-tests-windows-cross": ["exclusive-if-local"],
     },

codex-rs/windows-sandbox-rs/BUILD.bazel

@@ -9,6 +9,9 @@ codex_rust_crate(
     test_sizes = {
         "windows-sandbox-rs-unit-tests-windows-cross": "medium",
     },
+    # Cold Windows runs exceed the 60s short timeout, while remote results have
+    # reported about 3s and made the medium budget look oversized. Run it alone
+    # and bypass remote test-result caching so CI measures the cold runtime.
     test_tags_by_target = {
         "windows-sandbox-rs-unit-tests-windows-cross": [
             "exclusive-if-local",