v0.24.0

Added

• Introduced AppCode::new and AppCode::try_new constructors with strict
  SCREAMING_SNAKE_CASE validation, plus regression tests covering custom codes
  flowing through AppError and ErrorResponse JSON serialization.
• Documented runtime-defined codes across the wiki pages to highlight
  AppCode::try_new usage.

Changed

• Replaced the closed AppCode enum with a string-backed newtype supporting
  caller-defined codes while preserving built-in constants.
• Updated mapping helpers and generated tables to work with the new representation
  by returning references instead of copying codes.
• Adjusted serde parsing to validate custom codes and report
  ParseAppCodeError on invalid payloads.

v0.23.3

Changed

• Replaced temporary String allocations in RFC7807 metadata hashing and masking
  with stack buffers to keep the textual representations and digests stable
  while avoiding heap usage.

Added

• Regression tests covering hashed and last-four redaction paths for numeric,
  UUID, and IP metadata to guarantee the legacy formatting remains unchanged.

v0.23.2

Fixed

• Removed an unused String import from the response details module to keep
  builds warning-free under -D warnings.

v0.23.1

Fixed

• Restored the AppError::with_context helper as an alias for with_source,
  preserving the Arc fast-path, updating documentation and README templates,
  and adding regression tests for plain and anyhow::Error diagnostics.

v0.23.0

Added

• Added feature-gated detail payload storage to AppError with new
  with_details, with_details_json, and with_details_text helpers plus unit
  tests covering both serde-json configurations.
• Exposed the stored details through ProblemJson and legacy ErrorResponse
  conversions so RFC7807 and historical payloads emit the supplied data.

Changed

• Updated the documentation set to highlight the new helpers and clarify
  feature requirements for attaching structured details.

v0.22.0

Added

• Introduced an explicit std feature (enabled by default) and made the core
  crate compile in no_std + alloc environments, including metadata builders
  and error helpers.

Changed

• Reworked AppError internals to rely on core/alloc primitives and
  core::error::Error, providing std::error::Error only when the std
  feature is active.
• Replaced thiserror derives on AppErrorKind with manual Display/error
  implementations so the taxonomy remains available without the standard
  library.

v0.21.2

Added

• Expanded Metadata field coverage with float, duration, IP address and optional JSON values, complete with typed builders, doctests
  and unit tests covering the new cases.

Changed

• Enriched RFC7807 and gRPC adapters to propagate the new metadata types, hashing/masking them consistently across redaction policies.
• Documented the broader telemetry surface in the README so adopters discover the additional structured field builders.

v0.21.1

Fixed

• Packed rarely used AppError context (source and backtrace slots) inside the
  boxed inner payload so the AppResult alias no longer triggers Clippy's
  result_large_err lint under -D warnings.

v0.21.0

Added

• Introduced typed ensure! and fail! macros as allocation-free alternatives
  to anyhow::ensure!/anyhow::bail!, complete with documentation and tests.

Changed

• Highlighted the new control-flow macros across the English and Russian
  READMEs and module documentation so adopters discover them alongside the
  derive tooling.

v0.20.8

Fixed

• Classified Redis BusyLoadingError responses as DependencyUnavailable and
  preserved their retry advice in metadata so downstreams can distinguish cache
  warmup from client mistakes when the redis feature is enabled.
• Serialized the serde_json syntax error position using the location reported
  by serde_json::Error to stay aligned with the upstream parser changes.
• Guarded the tracing telemetry test with a process-wide mutex to prevent
  spurious race failures when the full feature suite runs the test harness in
  parallel.