v0.17.0

Added

• Per-field redaction metadata via a new [FieldRedaction] enum, default
  heuristics for common secret keys (passwords, tokens, card numbers) and the
  Context::redact_field / AppError::redact_field helpers.
• #[masterror(redact(fields(...)))] support in the derive macro to configure
  metadata policies alongside message redaction.
• Opt-in internal formatters for [ErrorResponse] and [ProblemJson] that are
  safe to use in diagnostic logs without additional serialization boilerplate.

Changed

• Problem JSON and legacy ErrorResponse serialization now hash, mask or drop
  metadata according to per-field policies while honoring the global redaction
  flag.
• Redaction-aware conversions ensure redactable messages fall back to the error
  kind across HTTP and gRPC mappings.

v0.16.0

Changed

• Switched the internal AppError source storage to Arc<dyn Error> and added a
  shared with_source_arc helper so conversions can reuse existing Arc
  handles without extra allocations.
• Replaced the backtrace slot with an Option<Backtrace> managed through an
  environment-aware lazy capture that respects RUST_BACKTRACE and avoids
  snapshot allocation when disabled.
• Updated the masterror::Error derive and ResultExt conversions to forward
  sources using the new shared storage while preserving error chains.

Tests

• Added regression coverage for the std::error::Error chain, Arc source
  preservation in the derives, and conditional backtrace capture driven by the
  RUST_BACKTRACE environment variable.

v0.15.0

Added

• Introduced a response::problem_json module with an RFC7807 ProblemJson
  payload that serializes metadata, gRPC mappings and retry/authentication
  hints while respecting the message redaction policy.
• Added an optional tonic feature exposing TryFrom<Error> for tonic::Status
  with sanitized metadata and canonical gRPC code mapping.
• Published a compile-time CODE_MAPPINGS table mapping each AppCode to
  HTTP, gRPC and problem type information for reuse across transports.

Changed

• Updated Axum and Actix integrations to emit application/problem+json
  bodies, attach Retry-After/WWW-Authenticate headers automatically and
  avoid leaking redactable messages or metadata.
• Re-exported ProblemJson from the crate root alongside ErrorResponse for
  direct construction in custom handlers.

Tests

• Added unit coverage for the problem+json metadata sanitizer, header
  propagation in Axum, and gRPC code mapping under the new tonic feature.

v0.14.1

Changed

• Boxed the internal AppError payload inside a new ErrorInner allocation,
  keeping public field access via Deref while shrinking the error to a
  pointer-sized handle that shares metadata, retry hints, and backtrace state.

Removed

• Dropped clippy::result_large_err allowances in response helpers and tests
  now that AppError is pointer-sized and lint-clean without suppressions.

Fixed

• Removed the unused BacktraceSlot::get helper to restore builds with -D warnings.
• Simplified the metrics recorder test harness with dedicated types to satisfy
  clippy::type_complexity without sacrificing coverage.

v0.14.0

Added

• Introduced optional tracing, metrics and backtrace features. When
  enabled they emit structured tracing events, increment the
  error_total{code,category} counter and capture lazy [Backtrace] snapshots
  from a new AppError::emit_telemetry hook.

Changed

• Reworked the AppError core to emit telemetry exactly once, track dirty
  mutations and expose a crate-private new_raw constructor for contexts that
  enrich errors before flushing instrumentation.
• Updated Axum and Actix integrations to rely on the telemetry hook instead of
  manually logging errors while preserving backward-compatible APIs.

Tests

• Added tracing dispatcher coverage to assert a single telemetry event with MDC
  propagated trace_id values.
• Installed a deterministic metrics recorder in unit tests to confirm
  error_total increments once per error.

v0.13.1

Fixed

• Documented allowances for clippy::result_large_err on APIs that intentionally
  expose the rich AppError payload, restoring lint-clean builds.

v0.13.0

Added

• Introduced #[derive(Masterror)] and the #[masterror(...)] attribute to
  convert domain errors directly into [masterror::Error] while capturing
  metadata, message redaction policy and optional transport mappings.
• Added transport mapping descriptors in mapping::{HttpMapping, GrpcMapping, ProblemMapping} generated by the new derive for HTTP/gRPC/problem-json
  integrations.

Changed

• Re-exported the Masterror derive from the crate root alongside the existing
  Error derive.

Documentation

• Expanded crate docs and both READMEs with Masterror examples, telemetry
  guidance and redaction policy notes.

Tests

• Added integration tests and trybuild coverage exercising the
  #[masterror(...)] attribute and generated mapping tables.

v0.12.1

Added

• Introduced the Context builder for enriching error conversions with
  metadata, caller tracking, and redaction hints via ResultExt::ctx.
• Implemented the ResultExt trait to wrap fallible operations into
  masterror::Error without extra allocations while merging context fields.

Documentation

• Added rustdoc examples showcasing Context chaining and the new
  ResultExt helper.

Tests

• Added unit coverage for ResultExt::ctx, ensuring happy-path results pass
  through and error branches preserve metadata and sources.

v0.12.0

Added

• Introduced typed Metadata storage with Field/FieldValue builders and helper functions in field::*.
• Captured error sources and backtraces inside the new app_error::Error container, exposing MessageEditPolicy to control redaction.

Changed

• Replaced the legacy AppError struct with the richer Error model carrying AppCode, metadata, retry/auth hints and transport policy.
• Updated response mapping and constructors to preserve machine-readable codes without extra allocations.

Documentation

• Refreshed crate docs, README (EN/RU) and examples to highlight metadata helpers and the new error contract.

Tests

• Added regression coverage ensuring codes, metadata and sources survive conversions without unnecessary cloning.

v0.11.2

Changed

• Surfaced the [AppErrorKind] display text as the fallback ErrorResponse
  message so clients receive semantic descriptions without providing a custom
  message.

Tests

• Added regression coverage ensuring bare AppError kinds map to their
  corresponding default message.