v0.7.0

[v0.7.0] - 2026-03-29

⚠️ BREAKING CHANGES

• AbsoluteTime restructured with u64 internal representation (P4-04) — Fields are now accessed via methods instead of direct field access. The internal representation is a single u64 (nanoseconds since start of day 1), making add_nanos/sub_nanos single arithmetic operations on the common path.

  Migration guide:

  • Field reads: t.hours → t.hours(), t.day_of_year → t.day_of_year(), t.nanoseconds → t.nanoseconds(), etc.
  • Optional fields: t.year → t.year()
  • Field mutations: t.year = Some(2025) → AbsoluteTime::new(...).unwrap().with_year(Some(2025)).unwrap()
  • Struct literals: AbsoluteTime { day_of_year: 100, hours: 12, ... } → AbsoluteTime::new(100, 12, ...)

• AbsoluteTime no longer holds calendar metadata — The month, day_of_month, set_month(), set_day_of_month(), and with_date() APIs have been removed. Calendar date information is now carried by the new CalendarTime type, which enforces that year, month, and day are all present and valid at construction time. This eliminates the class of bugs where partial calendar state (e.g., month set without day) could be constructed.

  Migration guide:

  • t.month() / t.day_of_month() → use CalendarTime instead of AbsoluteTime
  • t.set_month(Some(3)) / t.set_day_of_month(Some(15)) → CalendarTime::new(t, 3, 15)?
  • t.with_date(2025, 3, 15)? → CalendarTime::from_parts(2025, 3, 15, doy, h, m, s, ns)?
  • DmyFormatTime::to_absolute() → DmyFormatTime::to_calendar_time() (returns CalendarTime)
  • From<NaiveDateTime> for AbsoluteTime → From<NaiveDateTime> for CalendarTime
  • CalendarTime implements Deref<Target=AbsoluteTime>, so all AbsoluteTime methods work directly on CalendarTime values
  • To convert back: let abs: AbsoluteTime = calendar_time.into();

Added

• CalendarTime type (L3-ABS-006) — Calendar-aware absolute time with validated year, month, and day-of-month. Wraps AbsoluteTime with Deref<Target=AbsoluteTime>. Constructed via CalendarTime::new(abs_time, month, day) or CalendarTime::from_parts(year, month, day, doy, h, m, s, ns). Enforces at the type level that calendar metadata is either fully present and valid, or absent entirely.
• DmyFormatTime::to_calendar_time() — Replaces to_absolute() for DMY BCD format. Returns CalendarTime with validated year/month/day.
• From<CalendarTime> for chrono::NaiveDateTime — Direct conversion using validated month/day fields.
• From<chrono::NaiveDateTime> for CalendarTime — chrono always provides full date, so this returns CalendarTime (was AbsoluteTime).
• AbsoluteTime::as_total_ns() — Exposes the raw internal nanosecond count for efficient comparison and serialization.
• AbsoluteTime::with_year() — Consuming builder method that enriches a DOY timestamp with year metadata (0–9999). Returns Result<Self> for chaining: AbsoluteTime::new(...).unwrap().with_year(Some(2025)).unwrap(). Year is metadata, not a calendar invariant — see CalendarTime for full date validation.
• UDP framing documentation (P5-03) — New docs/udp_framing.md documenting that UDP Transfer Format 1 and 2 headers carry no time fields, and how to use StreamingTimeCorrelator for live UDP streams.
• WASM build verification (P6-06) — CI now verifies wasm32-unknown-unknown compilation with --no-default-features and --no-default-features --features serde.
• util module (P6-08) — Crate-internal is_leap_year and abs_diff_u64 helpers that replace u16::is_multiple_of (Rust 1.87) and u64::abs_diff (Rust 1.60) respectively. Each carries a targeted #[allow(clippy::...)] and full MSRV dependency documentation. 18 unit tests covering leap year rules (common, century, quad-century, edge cases, IRIG 106 era years) and abs_diff properties (symmetry, extremes, leap second timestamps).
• 11 new integration tests in tests/pipeline.rs: leap year rollover through sub_nanos (leap, non-leap, century, quad-century), BCD DMY Feb 29 on leap/non-leap years, is_near_leap_second via abs_diff_u64 (exact boundary, within window, outside, symmetry, far future).

Changed

• AbsoluteTime internal representation (P4-04) — Single u64 replaces 5 numeric fields. add_nanos is now a single u64 addition (was 4-level carry chain). sub_nanos year rollover is cleaner arithmetic. total_nanos_of_day() is a single modulo operation.
• Custom serde for AbsoluteTime — Serializes to the same expanded JSON shape as v0.6 (day_of_year, hours, minutes, seconds, nanoseconds, year, month, day_of_month) for backward compatibility. Deserializes and recomposes the u64 internally.
• GitHub Actions CI — Added wasm32-unknown-unknown build job. Separated stable (full cargo test) from MSRV 1.60 (cargo check only — dev-dependencies require newer Rust). Tests 4 feature combos on stable + WASM + MSRV check.
• Cargo.toml — Version bumped to 0.7.0. MSRV lowered from 1.87 to 1.60.
• CLI (irig106-time-cli) — Version bumped to 0.7.0. All AbsoluteTime field accesses migrated to methods.
• MSRV lowered from 1.87 → 1.60 (P6-08) — Replaced u16::is_multiple_of (Rust 1.87) with util::is_leap_year and u64::abs_diff (Rust 1.60) with util::abs_diff_u64. The MSRV is now constrained by dep: namespaced features in Cargo.toml (Rust 1.60). Each helper carries a targeted clippy #[allow] and full documentation of the API it replaces, the Rust version it avoids, and when it can be upgraded.
• API audit — Added Hash to 25 public types, enabling use as HashMap keys and HashSet members. Added Copy to TimeJump and RtcReset. AbsoluteTime intentionally omits Ord because derived PartialEq compares all fields including optional year metadata; callers needing within-year ordering should use as_total_ns(). TimeQuality omits Hash/Eq (contains f64).
• Documentation — All code examples in usage.md updated for method-based access. Version refs 0.6→0.7 across all docs.
• All consumer modules migrated: bcd.rs, chrono_interop.rs, network_time.rs, correlation.rs, quality.rs, streaming.rs, and all test files.
• Total test count: 269 (184 unit + 68 integration + 17 property).

v0.6.0

[v0.6.0] - 2026-03-29

Added

• streaming module (P5-02) — StreamingTimeCorrelator with sliding-window eviction for live UDP stream processing. Per-channel BTreeMap index with O(log n) lookup. Configurable max_age_ns window with automatic eviction of stale references. Methods: add_reference, add_reference_f2, correlate, evict, len, is_empty, total_evicted, max_age_ns, latest_rtc, channel_ids, channel_len. StreamingRef struct for reference points.
• quality module (P5-04) — TimeQuality struct and compute_quality(refs) function. Metrics: total_refs, channel_count, refs_per_channel, max_rtc_gap_ns, min_rtc_gap_ns, ref_density_per_sec, drift_ppm_per_channel, rtc_span_ns.
• packet_standard module (P5-01) — PacketStandard::Ch10 / Ch11 enum for IRIG 106-17 chapter provenance. from_version(), is_ch10(), is_ch11(), Display.
• recording_event module (GAP-08) — RecordingEventType enum (Started, Stopped, Overrun, IndexPoint, Reserved) and RecordingEvent struct with has_reference_time() and may_cause_time_gap(). Parses Data Type 0x02 event packets for time context.
• chrono_interop module (GAP-06) — Feature-gated From<AbsoluteTime> for chrono::NaiveDateTime and reverse. Enable with features = ["chrono"].
• F1 leap second handling (GAP-04) — LeapSecondTable::offset_for_f1(year, doy) for Format 1 time sources (IRIG-B, GPS). is_near_leap_second(unix_seconds, window_secs) for flagging packets near leap second boundaries.
• 34 new unit tests across 5 new test files: packet_standard_tests.rs (5), streaming_tests.rs (10), quality_tests.rs (6), recording_event_tests.rs (9), chrono_interop.rs (4).
• 7 new integration tests in tests/pipeline.rs: PacketStandard from version, streaming correlator basic pipeline, streaming eviction, quality metrics, F1 leap second offset, near leap second boundary, recording event pipeline.

Changed

• Cargo.toml — Version bumped to 0.6.0. Added chrono optional dependency and feature gate.
• CLI (irig106-time-cli) — Version bumped to 0.6.0.
• GitHub Actions CI — Added --features serde and --features chrono individual test runs to catch cross-feature coupling. Pipeline now tests 4 feature combinations: --all-features, --no-default-features, --features serde, --features chrono.
• Crate docs updated — lib.rs feature list now includes streaming correlation, quality metrics, packet standard, recording events, and chrono interop.
• Re-exports — PacketStandard, StreamingTimeCorrelator, StreamingRef, TimeQuality, compute_quality, RecordingEvent, RecordingEventType added to crate root.
• P5-05 (async API) permanently deferred — async runtime choice belongs to the application layer, not a #![no_std] parsing library.
• Rust formatting — Ran cargo fmt across all new modules.
• Test matrix totals: 244 checks under default features (166 unit + 57 integration + 17 property + 4 doc) and 249 with --all-features (170 unit + 57 integration + 17 property + 5 doc).

Fixed

• RtcReset.index now reports global index — v0.5.0 regression where detect_rtc_resets returned per-channel indices instead of global references() indices. Fixed via global_index_of() helper that matches on all fields.
• TimeJump.index correct for duplicate RTCs — v0.5.0 regression where .position() matched only on rtc + channel_id, always returning the first match for duplicate RTC values. Same global_index_of() fix.
• README/lib.rs serde claim — Now correctly says "except TimeError" to match usage.md and CHANGELOG.
• Clippy fixes — Removed unused Rtc import in quality.rs. Added alloc::format and alloc::vec imports in no_std test modules. Replaced manual abs diff with abs_diff() in is_near_leap_second.
• chrono doc test — Replaced ignore fence with real ```rust doc test that compiles under the chrono feature gate.

v0.5.0

[v0.5.0] - 2026-03-29

Added

• Channel-indexed correlation (P4-01) — Per-channel BTreeMap<u16, Vec<ReferencePoint>> index alongside the flat RTC-sorted vec. nearest_for_channel is now O(log n) binary search instead of O(n) linear scan. Methods upgraded: correlate(…, Some(ch)), detect_time_jump, drift_ppm, detect_rtc_resets.
• Per-channel accessors (P4-02) — TimeCorrelator::channel_references(channel_id) returns a sorted slice for a single channel. channel_ids() returns all active channel IDs.
• BCD lookup table (P4-03) — extract_bcd_digit now validates nibbles via a 16-entry const BCD_LUT instead of a branch, eliminating conditional logic in the hot path.
• Criterion benchmarks (P4-06) — benches/correlation_bench.rs with statistical benchmarks for correlate_any, correlate_by_channel, detect_time_jump, drift_ppm, and add_reference at 10/100/1000/3600 reference point scales.
• serde feature gate (GAP-02) — Optional Serialize/Deserialize derives on all public data types (except TimeError which contains &'static str fields). Enable with features = ["serde"].
• 7 new integration tests in tests/pipeline.rs: channel_references accessor, channel_ids, channel-indexed correlate consistency, large-set correlate, sub_nanos year boundary crossing, same-day no-year-change, and no-year-info graceful wrap.

Changed

• Cargo.toml — Version bumped to 0.5.0. Added serde optional dependency and feature gate. Added criterion to dev-dependencies with correlation_bench bench target.
• CLI (irig106-time-cli) — Version bumped to 0.5.0.
• Test structure — Extracted version.rs inline tests to src/version_tests.rs to match the crate's test-per-module convention.
• Crate docs updated — lib.rs feature list now includes channel-indexed O(log n) lookup and serde support.
• Total test count: 203 (136 unit + 50 integration + 17 property).

Fixed

• AbsoluteTime::sub_nanos year rollover (GAP-05) — Subtracting past day 1 now correctly decrements the year (accounting for leap years) instead of wrapping to day 366. When no year info is available, assumes 365 days.

v0.4.0

[v0.4.0] - 2026-03-28

Added

• version module (P2-03) — Irig106Version enum with variants Pre07 through V23 plus Unknown(u8). detect_version(tmats_csdw) extracts the version from bits [7:0] of the TMATS CSDW. Helper methods: is_pre_ordering_guarantee(), supports_format_2(), has_gps_time_source().
• Version-aware CSDW parsing (P2-04, P2-01) — TimeF1Csdw::time_source_versioned(version) disambiguates time source value 3, which was "None" in 106-04 but "GPS" from 106-05 onward. Pre-07 files return Reserved(3) to signal ambiguity.
• Configurable out-of-order window (P2-02) — TimeCorrelator::with_ooo_window(ooo_window_ns) constructor. Pre-105 files may need unbounded OOO tolerance; post-105 defaults to 2 seconds via DEFAULT_OOO_WINDOW_NS. Accessor: ooo_window_ns().
• RTC reset detection (GAP-07) — TimeCorrelator::detect_rtc_resets(channel_id) identifies counter resets (as opposed to 48-bit wraps) by checking whether RTC went backward while absolute time continued forward. Returns Vec<RtcReset> with before/after RTC and absolute time values.
• to_le_bytes() encoding (GAP-11) — Wire-format encoding for all parseable types, enabling packet construction for irig106-write:
  • Rtc::to_le_bytes() → [u8; 6]
  • TimeF1Csdw::to_le_bytes() → [u8; 4]
  • TimeF2Csdw::to_le_bytes() → [u8; 4]
  • NtpTime::to_le_bytes() → [u8; 8]
  • PtpTime::to_le_bytes() → [u8; 10]
  • DayFormatTime::to_le_bytes() → [u8; 8]
  • DmyFormatTime::to_le_bytes() → [u8; 10]
• 19 new integration tests in tests/pipeline.rs: version detection, version-aware CSDW, OOO window, RTC reset detection (basic, no false positive, channel isolation), and to_le_bytes round-trip for all 7 types.
• 4 new property tests in tests/properties.rs: encode round-trip for RTC, CSDW, NTP, and PTP.

Changed

• GitHub Actions — Updated actions/checkout from v4 to v6 across the CI workflow.
• Rust formatting — Ran cargo fmt across the repository to normalize code style.
• Crate docs updated — lib.rs feature list now includes version detection, RTC reset detection, and encoding.
• Re-exports — RtcReset, detect_version, and Irig106Version added to crate root.
• Cargo.toml — Version bumped to 0.4.0.
• CLI (irig106-time-cli) — Version bumped to 0.4.0.
• Total test count: 196 (136 unit + 43 integration + 17 property).

Fixed

• detect_rtc_resets sorted by absolute time — References are stored sorted by RTC for lookup efficiency. After a reset, the low RTC value was inserted before pre-reset values, masking the discontinuity. Now sorts filtered channel references by absolute time to restore temporal order.
• Removed unnecessary as u16 casts in DayFormatTime::to_le_bytes() and DmyFormatTime::to_le_bytes() — fields already typed u16 (milliseconds, day_of_year, year) no longer carry redundant casts.

Known Issues

• Legacy support is specification-based only. Version-aware CSDW parsing and OOO tolerance are implemented per the IRIG 106-04/05 specifications and validated with synthetic tests, but have not been tested against real Ch10 files from legacy recorders (Ampex DCRsi, L-3 MARS, Acra KAM-500). Tracked as P1-07 and P2-05.
• Ch4 Binary Weighted Time bit layout is unverified against multi-vendor samples. The current decode assumes a single bit-field interpretation. Real-world validation against multiple recorder vendors is needed. Tracked as GAP-03.

v0.3.0

[v0.3.0] - 2026-03-28

Added

• GitHub Actions CI/CD (P1-03) — Test on stable + MSRV 1.87, clippy, rustfmt, rustdoc, and CLI build/lint.
• impl Display for AbsoluteTime (GAP-01) — Formats as YYYY-MM-DD HH:MM:SS.mmm.uuu when year/month/day are available, or Day DDD HH:MM:SS.mmm.uuu otherwise.
• TimeCorrelator::drift_ppm(channel_id) (GAP-10) — Estimates RTC clock drift in parts-per-million against absolute time references. Returns average drift across consecutive same-channel reference pairs.
• Calendar validation in DMY BCD decoding (GAP-09) — DmyFormatTime::from_le_bytes now rejects invalid day-for-month combinations (e.g., Feb 30, Jun 31) via a days_in_month() helper that accounts for leap years.
• CLI Proto column (P1-09/GAP-12) — channels command table now shows NTP/PTP protocol identity. Summary view appends Proto: NTP or Proto: PTP for Format 2 channels. TimeChannelInfo carries a network_protocol field.
• proptest property-based tests (P1-08) — proptest = "1" added to [dev-dependencies]. tests/properties.rs rewritten with proptest! macros covering RTC masking, round-trip, elapsed bounds, absolute time add/sub/monotonicity/Display, IEEE-1588 consistency, CSDW stability, NTP fraction bounds, and PTP monotonicity.
• 10 new integration tests in tests/pipeline.rs: Display formatting (DOY, DMY, zero-padding), drift_ppm (zero drift, fast RTC, channel isolation, insufficient refs), calendar validation, and year overflow guard.

Changed

• #[deny(missing_docs)] (P1-04) — Added to crate root. All pub mod declarations in lib.rs now carry /// doc comments.
• Crate docs updated (GAP-13) — lib.rs module-level documentation now includes network time (NTP/PTP) and drift estimation in the feature list. Requirement traceability paths updated to lowercase filenames.
• unix_seconds_to_ymd_pub (GAP-15) — Visibility reduced from pub to pub(crate).
• Year overflow guard (GAP-16) — unix_seconds_to_ymd now uses saturating_add and breaks at u16::MAX to prevent panic on malformed timestamps far in the future.
• Cargo.toml — Version bumped to 0.3.0. rust-version = "1.87" MSRV declared.
• CLI (irig106-time-cli) — Version bumped to 0.3.0.
• Total test count: 163 (126 unit + 24 integration + 13 property).

Fixed

• Escaped bit-range bracket notation ([3:2], [3:0], etc.) in rustdoc comments across absolute.rs, csdw.rs, secondary.rs, intra_packet.rs, and network_time.rs to resolve 9 intra-doc link warnings.
• Resolved prop_assert! macro conflict with nested format! in property tests.
• Removed unused imports and variables in properties.rs and pipeline.rs.

v0.2.0

[v0.2.0] - 2026-03-28

Added

• network_time module — Time Data Format 2 (0x12, Network Time) support, introduced in IRIG 106-17 (CR93).
  • TimeF2Csdw — Format 2 channel-specific data word parser with NetworkTimeProtocol enum (NTP/PTP).
  • NtpTime — NTP timestamp (32-bit seconds since 1900-01-01 UTC + 32-bit fractional seconds). Includes fraction_as_nanos() (2⁻³² → ns conversion), to_unix_seconds(), to_nanos_since_ntp_epoch(), and to_absolute().
  • PtpTime — PTP/IEEE 1588 timestamp (48-bit seconds since 1970-01-01 TAI + 32-bit nanoseconds). Includes to_utc_seconds(tai_offset), to_nanos_since_tai_epoch(), and to_absolute(tai_offset).
  • NetworkTime enum — Discriminated union of Ntp(NtpTime) and Ptp(PtpTime).
  • parse_time_f2_payload() — Full payload dispatcher: CSDW → NTP or PTP time data.
  • LeapSecondTable — Built-in table with all 28 TAI-UTC leap seconds from 1972-01-01 (offset 10) through 2017-01-01 (offset 37). Binary search lookup via offset_at_unix() and offset_at_tai(). Runtime extensible via add().
  • NTP_UNIX_EPOCH_OFFSET constant (2,208,988,800 seconds).
  • DEFAULT_TAI_UTC_OFFSET constant (37 seconds, since 2017).
• TimeCorrelator::add_reference_f2() — Accept Format 2 (NTP/PTP) time packets as correlation reference points, with automatic leap-second offset application for PTP sources.
• 22 new unit tests in network_time_tests.rs covering F2 CSDW parsing, NTP parse/convert/epoch math, PTP parse/TAI-UTC conversion, leap second table lookup, and full payload dispatch.
• 5 new integration tests in tests/pipeline.rs: full NTP pipeline, full PTP pipeline, mixed F1+F2 correlation, NTP sub-millisecond precision, and leap second table historical accuracy.
• 2 new fuzz targets: fuzz_ntp and fuzz_ptp covering NTP and PTP parsing entry points.
• 7 new benchmarks: ntp_from_le_bytes (1.1 ns), ntp_to_absolute (115 ns), ptp_from_le_bytes (1.6 ns), ptp_to_absolute (119 ns), leap_table_lookup (6.6 ns), f2_ntp_payload_parse (2.7 ns).
• L1 Requirements updated — 16 new L1 requirements for Format 2 (F2CSDW, NTP, PTP, F2COR, TAI) merged into L1_Requirements.md, traced to Ch11 §11.2.3.3. Total: 53 L1 requirements.
• L2/L3 Requirements updated — Format 2 functional decomposition and design specifications merged into L2_Requirements.md (§3.10–3.14) and L3_Requirements.md (§3.12–3.13) with extended traceability matrices.
• CLI (irig106-time-cli) — ch10time now recognizes and processes Type 0x12 Network Time packets in all commands (summary, channels, jumps, timeline, csv, correlate). Uses built-in leap second table for PTP→UTC conversion.

Changed

• Re-exports at crate root now include all Format 2 types: TimeF2Csdw, NetworkTimeProtocol, NtpTime, PtpTime, NetworkTime, LeapSecondTable, LeapSecondEntry, NTP_UNIX_EPOCH_OFFSET, DEFAULT_TAI_UTC_OFFSET.
• Total test count: 151 (126 unit + 15 integration + 10 property).
• Total fuzz targets: 10 (8 original + 2 new).
• Total benchmarks: 30 (23 original + 7 new).
• CLI process_time_f2_packet refactored to use add_reference_f2() instead of manually duplicating NTP/PTP→AbsoluteTime conversion logic.
• F2 L1 requirements merged from standalone addendum into canonical L1_Requirements.md (§3.10–3.14).
• F2 L2/L3 requirements merged from standalone addendum into canonical L2_Requirements.md (§3.10–3.14) and L3_Requirements.md (§3.12–3.13). Removed L2L3_REQUIREMENTS_F2_ADDENDUM.md.
• usage.md updated with 3 new Format 2 sections (§13 Processing Network Time Packets, §14 Working with the Leap Second Table, §15 Correlating with F1 + F2 Sources), updated imports and version references throughout.

Fixed

• Resolved clippy manual_is_multiple_of in network_time.rs leap year check.
• Resolved clippy manual_range_contains in network_time_tests.rs and pipeline.rs NTP fractional precision assertions.
• Resolved clippy unused_imports in pipeline.rs F2 integration tests.
• Resolved clippy unused_must_use in time_benchmarks.rs for ntp_to_absolute and ptp_to_absolute benchmarks.
• Resolved clippy needless_borrow, for_kv_map, redundant_closure, single_match, and manual_is_multiple_of in CLI.

Known Issues

• CLI channels command displays NTP sources as "External / UTC" and PTP sources as "External / GPS" — the specific network protocol identity is not shown. Tracked as GAP-12, planned for v0.3.0 (P1-09).

v0.1.0

[v0.1.0] - 2026-03-26

Added

• rtc module — 48-bit Relative Time Counter newtype (Rtc) with from_le_bytes, from_raw, elapsed_ticks, elapsed_nanos, to_nanos, and wrap-around safe arithmetic.
• absolute module — AbsoluteTime with nanosecond precision, optional DMY calendar date, add_nanos/sub_nanos with carry logic. Ch4BinaryTime (Chapter 4 Binary Weighted Time), Ieee1588Time, and Ertc (64-bit Extended RTC).
• csdw module — TimeF1Csdw parser for Time Data Format 1 (0x11) channel-specific data word. TimeSource, TimeFormat, and DateFormat enums with bitfield extraction.
• bcd module — DayFormatTime (8-byte DOY BCD) and DmyFormatTime (10-byte DMY BCD) decoders with full BCD nibble validation, reserved-bit checking, and range validation.
• secondary module — Secondary header checksum validation (validate_secondary_checksum) and time parsing for Ch4, IEEE-1588, and ERTC formats via parse_secondary_header.
• intra_packet module — IntraPacketTime enum with 4 variants (Rtc, Ch4, Ieee1588, Ertc) and parse_intra_packet_time format dispatcher.
• correlation module — TimeCorrelator with sorted-insert reference points, nearest-point correlation with optional channel filtering, and detect_time_jump for GPS lock discontinuity detection.
• error module — TimeError non-exhaustive enum with 6 variants: InvalidBcdDigit, ReservedBitSet, OutOfRange, ChecksumMismatch, NoReferencePoint, BufferTooShort. Display impl and feature-gated std::error::Error.
• #![no_std] support — Crate compiles with only core and alloc. Optional std feature for Error impl.
• Zero required dependencies in [dependencies].
• Zero unsafe blocks in the entire crate.
• #[inline] annotations on all hot-path functions.
• 104 unit tests across 8 modules (tests in separate files alongside source).
• 10 integration tests in tests/pipeline.rs covering full CSDW-to-correlation flows, multi-channel scenarios, and GPS lock jump detection.
• 10 property-based tests in tests/properties.rs (10,000 iterations each, zero external dependencies).
• 23 benchmarks in benches/time_benchmarks.rs (zero-dependency, std::time::Instant).
• 8 fuzz targets in fuzz/fuzz_targets/ covering all parsing entry points.
• Companion CLI crate: irig106-time-cli with the ch10time binary for file summaries, channel inventory, jump detection, timelines, CSV export, and one-off RTC correlation.
• Documentation: L1/L2/L3 requirements, architecture doc, security doc, usage guide, test index, project structure, roadmap, changelog, shared types migration plan, and rationale for separate repo.