• Fix formatting and prevent it from happening again with a local git hook

Breaking #

• Plain string sources are always treated as inline payloads; pass a File or set allowFilePaths: true on load/convert/convertAndExport/ ActivityExportRequest.fromSource to read from disk.
• A 64MB cap (ActivityFiles.defaultMaxPayloadBytes) applies to load/convert/detect and streamed pipelines; oversized inputs throw or emit error diagnostics. Stream from disk/network or split files to go larger; only ActivityParser.parseStream(maxBytes: ...) lets you override the limit.

Added #

• Stream-backed loads are replayable; ActivityLoadResult.bytesPayload exposes buffered bytes even when the source was a Stream<List<int>>.
• FIT integrity: header/trailer CRCs and truncation are reported as error diagnostics (or throw when strictFitIntegrity: true); the encoder now emits invalid coordinate sentinels for sensor-only activities.
• Structural validation enforces lap ordering/overlap and warns when sensor channels extend past the point timeline during load/convert/export flows.
• GPX/TCX version selection: EncoderOptions and CLI flags can emit GPX 1.0/1.1 and TCX v1/v2; defaults remain GPX 1.1/TCX v2. FIT remains core-workout only.
• GPX 1.0 round-trips root metadata, track extensions, and labels when gpxVersion is GpxVersion.v1_0.

Changed #

• RawTransforms and RawEditor live in dedicated modules (transforms/raw_transforms.dart, transforms/raw_editor.dart); transforms.dart still exports both for existing imports.
• ChannelMapper.cursor exposes reusable per-channel cursors; mapAt now wraps it so overlays reuse cached lookups.
• GPX/TCX/FIT encoders reuse the cursor (TCX/FIT also use distance readings) to avoid repeated binary searches.
• Resampling pre-sizes timetables and reuses sliding cursors to keep RawTransforms.resample/_resampleNearest fast on long recordings.
• RawEditor skips work on sorted/valid inputs and reuses its timestamp cursor during downsampleTime.
• FIT exports defer base64 decoding until asBytes() when FIT sources arrive as base64 strings.
• RawEditor.smoothHR now uses a sliding window to stay O(n).

Fixed #

• RawEditor.downsampleDistance keeps the final point even on short hops or duplicate timestamps, preserving distance/duration and channel alignment.
• RawEditor.markLapsByDistance recovers from non-monotonic distance channels (e.g. pause resets) to keep splits accurate.
• RawEditor.smoothHR respects even-numbered windows instead of averaging an extra sample.
• Format detection inspects only a small prefix and honors payload caps.
• Exports with normalize: false auto-sort/dedup when needed; recomputeDistanceAndSpeed also self-sorts to avoid invalid speed/distance.
• RawEditor.sortAndDedup clones lists before sorting to keep prior RawActivity instances immutable.
• Malformed GPX/TCX and invalid FIT binaries now return structured ParseDiagnostic errors instead of raw exceptions.
• Stream parsing (parseStream, convertAndExportStream, runPipeline with streams) returns diagnostics for malformed/oversized payloads instead of throwing.
• CLI convert honors explicit --encoding, reads GPX/TCX as bytes to avoid Latin-1 corruption, and exits non-zero on parser errors.
• ActivityFiles.runPipeline no longer runs validation twice when runValidation is enabled.
• RawActivity.copyWith keeps collections immutable, recognizes canonical inputs to avoid clones, and reuses cached distances.
• RawTransforms.resample sorts points before resampling to avoid RangeErrors and keep start/end ordering.
• ActivityFiles.convert enforces the export ordering guard when normalize is false; detectFormat no longer probes filesystem paths unless allowed.

Fixed #

• wrong version in pubspec.yaml

Fixed #

• ActivityFiles.load/convert now honor the encoding parameter for GPX/TCX byte payloads (without BOMs), so Latin-1 and other single-byte exports no longer throw FormatException.
• ActivityParser.parseBytes exposes an encoding argument for callers that read non-UTF-8 text files directly into byte buffers.

Added #

• ActivityFiles.export produces encoded payloads with optional validation, normalization, and aggregated diagnostics in a single helper.
• ActivityFiles.convertAndExport exposes the same workflow directly from raw sources, including optional validation.
• ActivityFiles.exportAsync and convertAndExportStream mirror the export workflow off the UI thread and for streamed payloads.
• ActivityExportRequest and ActivityFiles.runPipeline let callers describe parse → normalize → export pipelines with consistent isolate controls.
• Diagnostic summary getters (warningCount, hasErrors, diagnosticsSummary, etc.) are now available on load, conversion, and export results to simplify UI surfacing.
• ActivityProcessingStats and NormalizationStats capture normalization and validation metrics alongside export diagnostics.
• Facade convenience wrappers expose common transforms (sortAndDedup, trimInvalid, smoothHeartRate, crop), structural validation, and channel snapshots.
• RawActivity and RawActivityBuilder gained device metadata and namespace aware GPX extension support, enabling richer encoder output without custom glue.
• DiagnosticsFormatter provides reusable helpers for summarising ParseDiagnostic collections across logs and UI surfaces.
• Stream-aware builder/export helpers (builderFromStreams, convertAndExport with location/channels) accept timestamp/value tuples so backends can export without manual model translation.
• ActivityFiles.registerSportMapper supplies pluggable sport inference and ships string/ID heuristics for common wearable categories.
• GPX encoders honour builder-supplied metadata/track names and expose helper factories (gpxActivityLabelNode, gpxDeviceSummaryNode) for custom extensions with automatic namespace registration.

Changed #

• GPX encoder now emits device metadata and custom extensions, automatically declaring any additional namespaces used.
• TCX encoder/parser preserve device metadata and custom extensions, and FIT files now round-trip device metadata, including explicit manufacturer/product identifiers supplied via ActivityDeviceMetadata.
• ActivityFiles.convert and convertAndExport now accept exportInIsolate, bringing isolate offloading parity while ensuring FIT byte caches refresh when the encoded payload changes.

Fixed #

• RawEditor.markLapsByDistance now reports per-split distances correctly and always emits a trailing partial lap when applicable, ensuring summary totals stay accurate.
• RawEditor.downsampleTime keeps the final point in the activity and performs sample matching without quadratic scans, avoiding data loss on closely spaced tracks.
• Channel deduplication retains the most recent sample when multiple readings share the same timestamp instead of discarding later values.
• ActivityFiles.channelSnapshot now uses binary search when resolving channel samples, reducing lookup cost from O(n) to O(log n) for large time-series streams.

Added #

• Asynchronous parsing surface: ActivityParser.parseAsync, parseBytesAsync, and parseStream optionally offload work to isolates for smoother UIs and streaming IO.
• ActivityFiles facade providing ergonomic load, convert, and edit helpers tailored for app integrations.
• RawActivityBuilder for incremental creation of activities.
• Asset-backed integration tests cover ActivityFiles.load, detectFormat, and conversion flows with real GPX/TCX/FIT fixtures.

Changed #

• GPX, TCX, and FIT parsers emit structured diagnostics instead of raw strings.
• Converter, CLI, documentation, examples, and tests now surface diagnostics in output flows.
• README/example now highlight the high-level facade and builder workflows.
• Added facade-focused regression tests covering format detection and builder seeding.

Deprecated #

• ActivityParseResult.warnings remains available but now forwards to the new structured diagnostics; it is marked deprecated to encourage migration.
• ActivityConverter.convert still accepts the warnings parameter, which is deprecated in favor of the richer diagnostics sink.

Fixed #

• pub.dev score fix.

Fixed #

• Fix README.

Added #

• Handle FIT compressed timestamp headers and ensure unknown message types advance the reader instead of hanging.
• Add ActivityParser.parseBytes, broaden ActivityConverter.convert input support, and let the CLI operate on raw FIT binaries without manual base64.
• Document the new FIT workflow and add regression coverage for compressed headers.

Added #

• Add example/main.dart illustrating a minimal GPX round-trip.

Changed #

• Upgrade dependencies and SDK.

Added #

• Initial release of activity_files with GPX/TCX parsing, editing, validation, and encoding utilities plus a conversion/validation CLI scaffold.