📝 Update More API Document

docs/api/parse-and-build-library-logger.md

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+---
+name: parse-and-build-library-logger
+group: api
+category: facade
+update-time: 20260520
+description: Parse JSON logger config text and build the library-facing sync logger facade.
+key-word:
+    - library
+    - facade
+    - parse
+    - public
+---
+
+## Parse-and-build-library-logger
+
+Parse raw JSON config text and build a `LibraryLogger[RuntimeSink]` in one step. This facade is the text-driven library counterpart to `parse_and_build_logger(...)`.
+
+### Interface
+
+```moonbit
+pub fn parse_and_build_library_logger(
+  input : String,
+) -> LibraryLogger[RuntimeSink] raise ConfigError {
+```
+
+#### input
+
+- `input : String` - Raw JSON logger config text.
+
+#### output
+
+- `LibraryLogger[RuntimeSink]` - Library-facing wrapper around the configured runtime logger.
+
+### Explanation
+
+Detailed rules explaining key parameters and behaviors
+
+- This API parses config text, validates it, builds the configured logger, and wraps it as a library facade.
+- The returned facade keeps a narrower surface than the underlying configured logger.
+- `to_logger()` can be used to recover the underlying full logger object when necessary.
+
+### How to Use
+
+Here are some specific examples provided.
+
+#### When Need Text-driven Library Bootstrapping
+
+When a reusable package wants config text input but a narrow logger facade output:
+```moonbit
+let logger = parse_and_build_library_logger(
+  "{\"min_level\":\"warn\",\"target\":\"lib\",\"sink\":{\"kind\":\"console\"}}",
+)
+```
+
+In this example, parsing and library-facade construction happen in one call.
+
+### Error Case
+
+e.g.:
+- If the JSON text is malformed, a `ConfigError` is raised.
+
+- If the parsed config is invalid, a `ConfigError` is raised before the library facade is returned.
+
+### Notes
+
+1. This is the narrow library-oriented parse-and-build sync entry point.
+
+2. Use `build_library_logger(...)` when the config is already typed.