diff --git a/README.md b/README.md
index e508bbb..4d061d6 100644
--- a/README.md
+++ b/README.md
@@ -197,6 +197,20 @@ logger.info("<accent>styled</> output and <danger>alert</>")
 
 </details>
 
+<details><summary>关闭 style markup 解析示例</summary>
+
+```moonbit
+let formatter = text_formatter(
+  color_mode=ColorMode::Always,
+).without_style_markup()
+
+let logger = Logger::new(text_console_sink(formatter), target="raw")
+
+logger.info("<red>kept as raw text</>")
+```
+
+</details>
+
 <details><summary>JSON 配置加载示例</summary>
 
 ```moonbit
@@ -226,6 +240,20 @@ logger.info("<accent>styled from json</>")
 
 </details>
 
+<details><summary>JSON style_markup 模式示例</summary>
+
+```moonbit
+let config = parse_logger_config_text(
+  "{\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"color_mode\":\"always\",\"style_markup\":\"disabled\"}}}",
+)
+
+let logger = build_logger(config)
+
+logger.info("<red>still raw</>")
+```
+
+</details>
+
 <details><summary>native 文件 sink 示例</summary>
 
 ```moonbit
@@ -277,6 +305,7 @@ match logger.file_runtime_state() {
 - `QueueConfig`, `TextFormatterConfig`, `SinkConfig` 可分别通过 `queue_config_to_json(...)` / `stringify_queue_config(...)`, `text_formatter_config_to_json(...)` / `stringify_text_formatter_config(...)`, `sink_config_to_json(...)` / `stringify_sink_config(...)` 单独导出 JSON
 - 支持字段: `min_level`, `target`, `timestamp`, `sink.kind`, `sink.path`, `sink.append`, `sink.auto_flush`, `sink.rotation`, `sink.text_formatter`, `queue`
 - `TextFormatter` / `TextFormatterConfig` 提供 `color_mode = Never | Auto | Always`, 可控制 ANSI 文本着色
+- `TextFormatter` / `TextFormatterConfig` 提供 `style_markup = disabled | builtin | full`, 可决定是否解析 style markup 以及是否启用 custom style tag
 - `message` 支持轻量 inline style tag: `<red>...</>`, `<b>...</>`, `<#ff0000>...</>`, `<bg:#202020>...</>`
 - 运行期样式标签 API: `TextStyle`, `StyleTagRegistry`, `style_tag_registry()`, `default_style_tag_registry()`, `set_tag(...)`, `define_alias(...)`
 - 样式标签优先级: formatter 局部 `style_tags` > 全局 style tag registry > 内置标签
@@ -306,6 +335,7 @@ match logger.file_runtime_state() {
 - `file_sink_state_to_json(...)`, `stringify_file_sink_state(...)`, `runtime_file_state_to_json(...)`, `stringify_runtime_file_state(...)` 可直接把 file / queued-file 快照导出为 JSON, 便于排障或上报
 - `sink.text_formatter.template` 支持固定 token: `{timestamp}`, `{timestamp_ms}`, `{level}`, `{target}`, `{message}`, `{fields}`
 - `sink.text_formatter.color_mode` 支持 `never`, `auto`, `always`
+- `sink.text_formatter.style_markup` 支持 `disabled`, `builtin`, `full`
 - `sink.text_formatter.style_tags.<name>` 支持 `fg`, `bg`, `bold`, `dim`, `italic`, `underline`
 - 可由配置直接组装的 sink 类型: `console`, `json_console`, `text_console`, `file`
 - `queue` 作为显式包装层附着在最终 sink 外侧. 这仍然是同步 drain 模型, 不是 async runtime
diff --git a/bitlogger/BitLogger_test.mbt b/bitlogger/BitLogger_test.mbt
index c5ce637..848cbf3 100644
--- a/bitlogger/BitLogger_test.mbt
+++ b/bitlogger/BitLogger_test.mbt
@@ -74,8 +74,9 @@ test "logger config parser reads formatter and queue options" {
 
 test "logger config parser reads formatter style tags" {
   let config = parse_logger_config_text(
-    "{\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"color_mode\":\"always\",\"style_tags\":{\"accent\":{\"fg\":\"#4cc9f0\",\"bold\":true},\"panel\":{\"bg\":\"#202020\",\"underline\":true}}}}}",
+    "{\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"color_mode\":\"always\",\"style_markup\":\"builtin\",\"style_tags\":{\"accent\":{\"fg\":\"#4cc9f0\",\"bold\":true},\"panel\":{\"bg\":\"#202020\",\"underline\":true}}}}}",
   )
+  inspect(style_markup_mode_label(config.sink.text_formatter.style_markup), content="builtin")
   inspect(config.sink.text_formatter.style_tags.length(), content="2")
   match config.sink.text_formatter.style_tags.get("accent") {
     Some(style) => {
@@ -148,6 +149,7 @@ test "logger config stringify roundtrips formatter style tags" {
         kind=SinkKind::TextConsole,
         text_formatter=TextFormatterConfig::new(
           color_mode=ColorMode::Always,
+          style_markup=StyleMarkupMode::Builtin,
           style_tags={
             "accent": text_style(fg=Some("#4cc9f0"), bold=true),
             "panel": text_style(bg=Some("#202020"), dim=true),
@@ -158,6 +160,7 @@ test "logger config stringify roundtrips formatter style tags" {
   )
   let config = parse_logger_config_text(text)
   inspect(color_mode_label(config.sink.text_formatter.color_mode), content="always")
+  inspect(style_markup_mode_label(config.sink.text_formatter.style_markup), content="builtin")
   inspect(config.sink.text_formatter.style_tags.length(), content="2")
   inspect(config.sink.text_formatter.style_tags.get("accent").unwrap().fg.unwrap(), content="#4cc9f0")
   inspect(config.sink.text_formatter.style_tags.get("accent").unwrap().bold, content="true")
@@ -204,12 +207,13 @@ test "config subtype json helpers stringify stable shapes" {
         field_separator=",",
         template="[{level}] {message} :: {fields}",
         color_mode=ColorMode::Always,
+        style_markup=StyleMarkupMode::Builtin,
         style_tags={
           "accent": text_style(fg=Some("#4cc9f0"), bold=true),
         },
       ),
     ),
-    content="{\"show_timestamp\":false,\"show_level\":true,\"show_target\":false,\"show_fields\":true,\"separator\":\" | \",\"field_separator\":\",\",\"template\":\"[{level}] {message} :: {fields}\",\"color_mode\":\"always\",\"style_tags\":{\"accent\":{\"bold\":true,\"dim\":false,\"italic\":false,\"underline\":false,\"fg\":\"#4cc9f0\"}}}",
+    content="{\"show_timestamp\":false,\"show_level\":true,\"show_target\":false,\"show_fields\":true,\"separator\":\" | \",\"field_separator\":\",\",\"template\":\"[{level}] {message} :: {fields}\",\"color_mode\":\"always\",\"style_markup\":\"builtin\",\"style_tags\":{\"accent\":{\"bold\":true,\"dim\":false,\"italic\":false,\"underline\":false,\"fg\":\"#4cc9f0\"}}}",
   )
   inspect(
     stringify_sink_config(
@@ -222,7 +226,7 @@ test "config subtype json helpers stringify stable shapes" {
         text_formatter=TextFormatterConfig::new(show_timestamp=false, color_mode=ColorMode::Auto),
       ),
     ),
-    content="{\"kind\":\"file\",\"path\":\"demo.log\",\"append\":false,\"auto_flush\":false,\"text_formatter\":{\"show_timestamp\":false,\"show_level\":true,\"show_target\":true,\"show_fields\":true,\"separator\":\" \",\"field_separator\":\" \",\"template\":\"\",\"color_mode\":\"auto\"},\"rotation\":{\"max_bytes\":128,\"max_backups\":2}}",
+    content="{\"kind\":\"file\",\"path\":\"demo.log\",\"append\":false,\"auto_flush\":false,\"text_formatter\":{\"show_timestamp\":false,\"show_level\":true,\"show_target\":true,\"show_fields\":true,\"separator\":\" \",\"field_separator\":\" \",\"template\":\"\",\"color_mode\":\"auto\",\"style_markup\":\"full\"},\"rotation\":{\"max_bytes\":128,\"max_backups\":2}}",
   )
 }
 
@@ -242,6 +246,40 @@ test "config formatter style tags render in built logger" {
   inspect(rendered, content="[\u{001b}[32mINFO\u{001b}[0m] \u{001b}[38;2;76;201;240;1mtag\u{001b}[0m")
 }
 
+test "config builtin style markup ignores custom tags" {
+  let formatter = TextFormatterConfig::new(
+    show_level=false,
+    show_target=false,
+    color_mode=ColorMode::Always,
+    style_markup=StyleMarkupMode::Builtin,
+    style_tags={
+      "accent": text_style(fg=Some("#4cc9f0"), bold=true),
+    },
+  )
+  let rendered = format_text(
+    Record::new(Level::Info, "<accent>custom</> <red>builtin</>"),
+    formatter=formatter.to_formatter(),
+  )
+  inspect(rendered, content="<accent>custom</> \u{001b}[31mbuiltin\u{001b}[0m")
+}
+
+test "config disabled style markup keeps raw tags" {
+  let formatter = TextFormatterConfig::new(
+    show_level=false,
+    show_target=false,
+    color_mode=ColorMode::Always,
+    style_markup=StyleMarkupMode::Disabled,
+    style_tags={
+      "accent": text_style(fg=Some("#4cc9f0"), bold=true),
+    },
+  )
+  let rendered = format_text(
+    Record::new(Level::Info, "<accent>raw</> <red>tag</>"),
+    formatter=formatter.to_formatter(),
+  )
+  inspect(rendered, content="<accent>raw</> <red>tag</>")
+}
+
 test "build logger from config supports queued text console" {
   let logger = build_logger(
     LoggerConfig::new(
diff --git a/bitlogger/BitLogger_wbtest.mbt b/bitlogger/BitLogger_wbtest.mbt
index 7f728cb..3df1c00 100644
--- a/bitlogger/BitLogger_wbtest.mbt
+++ b/bitlogger/BitLogger_wbtest.mbt
@@ -123,6 +123,39 @@ test "text formatter keeps unknown inline tags as plain text" {
   )
 }
 
+test "text formatter can disable style markup parsing" {
+  let rec = record(Level::Info, "<red>boom</> <b>bold</>", target="svc")
+  inspect(
+    format_text(
+      rec,
+      formatter=text_formatter(color_mode=ColorMode::Always).without_style_markup(),
+    ),
+    content="[\u{001b}[32mINFO\u{001b}[0m] [\u{001b}[34msvc\u{001b}[0m] <red>boom</> <b>bold</>",
+  )
+}
+
+test "text formatter builtin style markup mode ignores custom tags" {
+  let formatter = text_formatter(
+    show_level=false,
+    show_target=false,
+    color_mode=ColorMode::Always,
+    style_markup=StyleMarkupMode::Builtin,
+  ).with_style_tags(
+    style_tag_registry().set_tag("accent", fg=Some("#4cc9f0"), bold=true),
+  )
+  let rec = record(Level::Info, "<accent>custom</> <red>builtin</>")
+  inspect(
+    format_text(rec, formatter=formatter),
+    content="<accent>custom</> \u{001b}[31mbuiltin\u{001b}[0m",
+  )
+}
+
+test "style markup mode label is stable" {
+  inspect(style_markup_mode_label(StyleMarkupMode::Disabled), content="disabled")
+  inspect(style_markup_mode_label(StyleMarkupMode::Builtin), content="builtin")
+  inspect(style_markup_mode_label(StyleMarkupMode::Full), content="full")
+}
+
 test "text formatter supports custom style tags" {
   let formatter = text_formatter(
     show_level=false,
diff --git a/bitlogger/README.mbt.md b/bitlogger/README.mbt.md
index 0fc3472..fafb3cb 100644
--- a/bitlogger/README.mbt.md
+++ b/bitlogger/README.mbt.md
@@ -206,6 +206,16 @@ test {
 }
 ```
 
+```mbt check
+test {
+  let formatter = text_formatter(
+    color_mode=ColorMode::Always,
+  ).without_style_markup()
+  let logger = Logger::new(text_console_sink(formatter), target="raw")
+  logger.info("<red>kept as raw text</>")
+}
+```
+
 ```mbt check
 test {
   let config = parse_logger_config_text(
@@ -227,10 +237,21 @@ test {
 }
 ```
 
+```mbt check
+test {
+  let config = parse_logger_config_text(
+    "{\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"color_mode\":\"always\",\"style_markup\":\"disabled\"}}}",
+  )
+  let logger = build_logger(config)
+  logger.info("<red>still raw</>")
+}
+```
+
 ## Formatter Template / 模板格式
 
 - supported tokens / 支持的 token: `{timestamp}`, `{timestamp_ms}`, `{level}`, `{target}`, `{message}`, `{fields}`
 - `color_mode` / `color_mode`: `never`, `auto`, `always`
+- `style_markup` / `style_markup`: `disabled`, `builtin`, `full`
 - inline style tags / inline 样式标签: `<red>...</>`, `<b>...</>`, `<#ff0000>...</>`, `<bg:#202020>...</>`
 - runtime style tags / 运行期样式标签: `TextStyle`, `StyleTagRegistry`, `style_tag_registry()`, `default_style_tag_registry()`, `set_tag(...)`, `define_alias(...)`
 - style tag priority / 标签优先级: formatter local `style_tags` > global style tag registry > builtin tags
diff --git a/bitlogger/config.mbt b/bitlogger/config.mbt
index 6999be0..55e2e60 100644
--- a/bitlogger/config.mbt
+++ b/bitlogger/config.mbt
@@ -18,6 +18,7 @@ pub struct TextFormatterConfig {
   field_separator : String
   template : String
   color_mode : ColorMode
+  style_markup : StyleMarkupMode
   style_tags : Map[String, TextStyle]
 }
 
@@ -30,6 +31,7 @@ pub fn TextFormatterConfig::new(
   field_separator~ : String = " ",
   template~ : String = "",
   color_mode~ : ColorMode = ColorMode::Never,
+  style_markup~ : StyleMarkupMode = StyleMarkupMode::Full,
   style_tags~ : Map[String, TextStyle] = {},
 ) -> TextFormatterConfig {
   {
@@ -41,6 +43,7 @@ pub fn TextFormatterConfig::new(
     field_separator,
     template,
     color_mode,
+    style_markup,
     style_tags,
   }
 }
@@ -63,6 +66,7 @@ pub fn TextFormatterConfig::to_formatter(self : TextFormatterConfig) -> TextForm
     field_separator=self.field_separator,
     template=self.template,
     color_mode=self.color_mode,
+    style_markup=self.style_markup,
     style_tags=if self.style_tags.length() == 0 {
       None
     } else {
@@ -857,6 +861,15 @@ fn parse_color_mode(name : String) -> ColorMode raise ConfigError {
   }
 }
 
+fn parse_style_markup_mode(name : String) -> StyleMarkupMode raise ConfigError {
+  match name.to_upper() {
+    "DISABLED" => StyleMarkupMode::Disabled
+    "BUILTIN" => StyleMarkupMode::Builtin
+    "FULL" => StyleMarkupMode::Full
+    _ => raise ConfigError::InvalidConfig("Unsupported style markup mode: " + name)
+  }
+}
+
 fn sink_kind_label(kind : SinkKind) -> String {
   match kind {
     SinkKind::Console => "console"
@@ -877,6 +890,7 @@ fn parse_text_formatter_config(value : @json_parser.JsonValue) -> TextFormatterC
     field_separator=get_string(obj, "field_separator", default=" "),
     template=get_string(obj, "template", default=""),
     color_mode=parse_color_mode(get_string(obj, "color_mode", default="never")),
+    style_markup=parse_style_markup_mode(get_string(obj, "style_markup", default="full")),
     style_tags=match obj.get("style_tags") {
       None => {}
       Some(inner) => parse_style_tags_config(inner)
@@ -1000,6 +1014,7 @@ pub fn text_formatter_config_to_json(config : TextFormatterConfig) -> @json_pars
     "field_separator": @json_parser.JsonValue::String(config.field_separator),
     "template": @json_parser.JsonValue::String(config.template),
     "color_mode": @json_parser.JsonValue::String(color_mode_label(config.color_mode)),
+    "style_markup": @json_parser.JsonValue::String(style_markup_mode_label(config.style_markup)),
   }
   if config.style_tags.length() != 0 {
     obj["style_tags"] = style_tags_config_to_json(config.style_tags)
diff --git a/bitlogger/formatter.mbt b/bitlogger/formatter.mbt
index 5f6421c..034b04a 100644
--- a/bitlogger/formatter.mbt
+++ b/bitlogger/formatter.mbt
@@ -6,6 +6,12 @@ pub(all) enum ColorMode {
   Always
 }
 
+pub(all) enum StyleMarkupMode {
+  Disabled
+  Builtin
+  Full
+}
+
 pub struct TextStyle {
   fg : String?
   bg : String?
@@ -165,6 +171,7 @@ pub struct TextFormatter {
   field_separator : String
   template : String
   color_mode : ColorMode
+  style_markup : StyleMarkupMode
   style_tags : StyleTagRegistry?
 }
 
@@ -177,6 +184,7 @@ pub fn text_formatter(
   field_separator~ : String = " ",
   template~ : String = "",
   color_mode~ : ColorMode = ColorMode::Never,
+  style_markup~ : StyleMarkupMode = StyleMarkupMode::Full,
   style_tags~ : StyleTagRegistry? = None,
 ) -> TextFormatter {
   {
@@ -188,10 +196,27 @@ pub fn text_formatter(
     field_separator,
     template,
     color_mode,
+    style_markup,
     style_tags,
   }
 }
 
+pub fn style_markup_mode_label(mode : StyleMarkupMode) -> String {
+  match mode {
+    StyleMarkupMode::Disabled => "disabled"
+    StyleMarkupMode::Builtin => "builtin"
+    StyleMarkupMode::Full => "full"
+  }
+}
+
+pub fn TextFormatter::with_style_markup(self : TextFormatter, style_markup : StyleMarkupMode) -> TextFormatter {
+  { ..self, style_markup }
+}
+
+pub fn TextFormatter::without_style_markup(self : TextFormatter) -> TextFormatter {
+  { ..self, style_markup: StyleMarkupMode::Disabled }
+}
+
 pub fn TextFormatter::with_style_tags(self : TextFormatter, style_tags : StyleTagRegistry) -> TextFormatter {
   { ..self, style_tags: Some(style_tags) }
 }
@@ -427,6 +452,10 @@ fn builtin_text_style_for_tag(tag : String) -> TextStyle? {
 
 fn resolve_registered_text_style(tag : String, formatter : TextFormatter) -> TextStyle? {
   let normalized = normalize_style_tag_name(tag)
+  match formatter.style_markup {
+    StyleMarkupMode::Builtin => return builtin_text_style_for_tag(normalized)
+    _ => ()
+  }
   match formatter.style_tags {
     Some(registry) => match registry.get(normalized) {
       Some(style) => Some(style)
@@ -522,6 +551,10 @@ fn parse_inline_markup(input : String, formatter : TextFormatter) -> Array[Style
 }
 
 fn render_inline_markup(message : String, formatter : TextFormatter) -> String {
+  match formatter.style_markup {
+    StyleMarkupMode::Disabled => return message
+    _ => ()
+  }
   let enabled = use_ansi_color(formatter.color_mode)
   let segments = parse_inline_markup(message, formatter)
   let out = StringBuilder::new()
diff --git a/docs/README-en.md b/docs/README-en.md
index 8c35bcb..52d0f2a 100644
--- a/docs/README-en.md
+++ b/docs/README-en.md
@@ -183,6 +183,18 @@ let logger = Logger::new(text_console_sink(formatter), target="styled")
 logger.info("<accent>styled</> output and <danger>alert</>")
 ```
 
+Disable style markup parsing:
+
+```moonbit
+let formatter = text_formatter(
+  color_mode=ColorMode::Always,
+).without_style_markup()
+
+let logger = Logger::new(text_console_sink(formatter), target="raw")
+
+logger.info("<red>kept as raw text</>")
+```
+
 JSON config loading:
 
 ```moonbit
@@ -208,6 +220,18 @@ let logger = build_logger(config)
 logger.info("<accent>styled from json</>")
 ```
 
+JSON `style_markup` mode:
+
+```moonbit
+let config = parse_logger_config_text(
+  "{\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"color_mode\":\"always\",\"style_markup\":\"disabled\"}}}",
+)
+
+let logger = build_logger(config)
+
+logger.info("<red>still raw</>")
+```
+
 Native file sink:
 
 ```moonbit
@@ -257,6 +281,7 @@ match logger.file_runtime_state() {
 - `QueueConfig`, `TextFormatterConfig`, and `SinkConfig` can also be exported independently through `queue_config_to_json(...)` / `stringify_queue_config(...)`, `text_formatter_config_to_json(...)` / `stringify_text_formatter_config(...)`, and `sink_config_to_json(...)` / `stringify_sink_config(...)`.
 - Supported keys include `min_level`, `target`, `timestamp`, `sink.kind`, `sink.path`, `sink.append`, `sink.auto_flush`, `sink.rotation`, `sink.text_formatter`, and `queue`.
 - `TextFormatter` and `TextFormatterConfig` now include `color_mode = Never | Auto | Always` for ANSI text coloring control.
+- `TextFormatter` and `TextFormatterConfig` also include `style_markup = disabled | builtin | full` so callers can choose whether style markup is parsed and whether custom tags are active.
 - `message` also supports lightweight inline style tags such as `<red>...</>`, `<b>...</>`, `<#ff0000>...</>`, and `<bg:#202020>...</>`.
 - Runtime style-tag APIs now include `TextStyle`, `StyleTagRegistry`, `style_tag_registry()`, `default_style_tag_registry()`, `set_tag(...)`, and `define_alias(...)`.
 - Style-tag lookup priority is formatter-local `style_tags` > global style tag registry > builtin tags.
@@ -286,6 +311,7 @@ match logger.file_runtime_state() {
 - `file_sink_state_to_json(...)`, `stringify_file_sink_state(...)`, `runtime_file_state_to_json(...)`, and `stringify_runtime_file_state(...)` can export file and queued-file snapshots directly as JSON for diagnostics or reporting.
 - `sink.text_formatter.template` currently supports fixed tokens: `{timestamp}`, `{timestamp_ms}`, `{level}`, `{target}`, `{message}`, and `{fields}`.
 - `sink.text_formatter.color_mode` currently supports `never`, `auto`, and `always`.
+- `sink.text_formatter.style_markup` currently supports `disabled`, `builtin`, and `full`.
 - `sink.text_formatter.style_tags.<name>` currently supports `fg`, `bg`, `bold`, `dim`, `italic`, and `underline`.
 - Config-driven sink assembly currently supports `console`, `json_console`, `text_console`, and `file`.
 - `queue` remains a synchronous bounded wrapper around the final sink, not an async runtime.
diff --git a/docs/changes/0.4.0.md b/docs/changes/0.4.0.md
index 386919f..a41384d 100644
--- a/docs/changes/0.4.0.md
+++ b/docs/changes/0.4.0.md
@@ -14,6 +14,8 @@ version 0.4.0
 - feat: add `TextStyle`, `StyleTagRegistry`, `style_tag_registry()`, and `default_style_tag_registry()` for reusable inline style tags
 - feat: add formatter-local `style_tags`, global style tag registry helpers, builtin-tag override support, and alias reuse via `define_alias(...)`
 - feat: support minimal `sink.text_formatter.style_tags` JSON config parsing and serialization for custom formatter tag styles
+- feat: add `StyleMarkupMode = Disabled | Builtin | Full` plus formatter helpers so callers can explicitly disable style parsing or allow builtin-only parsing
+- feat: support `sink.text_formatter.style_markup` in JSON config parsing and serialization
 
 ### Test
 
@@ -24,11 +26,13 @@ version 0.4.0
 - test: cover plain mode tag stripping, nested tags, hex tags, and unknown-tag fallback behavior
 - test: cover custom tags, builtin-tag override, formatter-vs-global priority, global registry fallback, and alias reuse
 - test: cover formatter `style_tags` JSON parsing, config roundtrip, JSON helper export, and config-driven styled formatter rendering
+- test: cover disabled markup mode, builtin-only mode, and config-driven `style_markup` behavior
 
 ### Example
 
 - docs: add `color_mode` usage examples to formatter documentation
 - docs: add runtime and JSON `style_tags` examples, and document current JSON schema scope
+- docs: add runtime and JSON examples for toggling style markup parsing
 
 ### Notes
 
@@ -37,3 +41,4 @@ version 0.4.0
 - unknown or invalid inline tags currently fall back to plain text and do not raise formatter errors
 - formatter-local tag lookup currently takes precedence over global tag lookup, and global lookup takes precedence over builtin tags
 - JSON config currently supports concrete style objects only; alias-style declarations remain runtime-only
+- users can now decide whether custom style parsing is enabled through runtime formatter APIs or `sink.text_formatter.style_markup`