diff --git a/cli/src/main.rs b/cli/src/main.rs
index 9c22789e..6842106b 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -930,8 +930,10 @@ fn chunks_for_segments(
             let title = format!("{} (phrase {phrase})", inputs.title);
             let mut meta = build_chunk_meta(&sub, path, Some(track), id, title, inputs, None);
             let last = end.saturating_sub(1);
-            meta.source.bar_range =
-                Some((u32::try_from(start).unwrap_or(0), u32::try_from(last).unwrap_or(0)));
+            meta.source.bar_range = Some((
+                u32::try_from(start).unwrap_or(0),
+                u32::try_from(last).unwrap_or(0),
+            ));
             meta
         })
         .collect()
@@ -1580,7 +1582,11 @@ mod tests {
         );
 
         // `techniques` is auto-filled from the notation…
-        assert!(meta.techniques.contains(&"hammer_on".to_owned()), "{:?}", meta.techniques);
+        assert!(
+            meta.techniques.contains(&"hammer_on".to_owned()),
+            "{:?}",
+            meta.techniques
+        );
         assert!(
             meta.techniques.contains(&"pinch_harmonic".to_owned()),
             "{:?}",
@@ -1588,8 +1594,16 @@ mod tests {
         );
         // …and the curator's hand-picked tag survives alongside the derived ones.
         assert!(meta.tags.contains(&SwancoreTag::Intro), "{:?}", meta.tags);
-        assert!(meta.tags.contains(&SwancoreTag::HammerOn), "{:?}", meta.tags);
-        assert!(meta.tags.contains(&SwancoreTag::ArtificialHarmonic), "{:?}", meta.tags);
+        assert!(
+            meta.tags.contains(&SwancoreTag::HammerOn),
+            "{:?}",
+            meta.tags
+        );
+        assert!(
+            meta.tags.contains(&SwancoreTag::ArtificialHarmonic),
+            "{:?}",
+            meta.tags
+        );
     }
 
     #[test]
@@ -1663,7 +1677,12 @@ mod tests {
         // Four bars, a note on each downbeat.
         let voice = voice_of(
             0,
-            vec![quarter(0, 60), quarter(1920, 62), quarter(3840, 64), quarter(5760, 65)],
+            vec![
+                quarter(0, 60),
+                quarter(1920, 62),
+                quarter(3840, 64),
+                quarter(5760, 65),
+            ],
         );
         let score = Score {
             ticks_per_quarter: 480,
@@ -1673,8 +1692,7 @@ mod tests {
             loss: LossReport::new(),
         };
 
-        let chunks =
-            phrase_chunks(Path::new("riff.gp5"), &score, &split_inputs()).expect("splits");
+        let chunks = phrase_chunks(Path::new("riff.gp5"), &score, &split_inputs()).expect("splits");
         assert!(!chunks.is_empty(), "at least one phrase chunk");
 
         // Whatever the detector decides, the chunks tile the four bars with
@@ -1706,8 +1724,13 @@ mod tests {
         };
 
         // A sounding [0,2) segment and a silent [2,4) one.
-        let chunks =
-            chunks_for_segments(Path::new("riff.gp5"), &score, &split_inputs(), 0, &[0..2, 2..4]);
+        let chunks = chunks_for_segments(
+            Path::new("riff.gp5"),
+            &score,
+            &split_inputs(),
+            0,
+            &[0..2, 2..4],
+        );
         assert_eq!(chunks.len(), 1, "the silent [2,4) segment is dropped");
         assert_eq!(
             chunks[0].source.bar_range,
@@ -1728,7 +1751,10 @@ mod tests {
         // track, is a rest in this phrase and must be dropped rather than
         // re-measured on the later track that happens to have notes there.
         let detected = track_of(vec![voice_of(0, vec![quarter(0, 60), quarter(1920, 62)])]);
-        let other = track_of(vec![voice_of(0, vec![quarter(3840, 48), quarter(5760, 50)])]);
+        let other = track_of(vec![voice_of(
+            0,
+            vec![quarter(3840, 48), quarter(5760, 50)],
+        )]);
         let score = Score {
             ticks_per_quarter: 480,
             master_bars: split_master_bars(),
diff --git a/core/src/dump.rs b/core/src/dump.rs
index 97ebf1ee..9fc5e5a4 100644
--- a/core/src/dump.rs
+++ b/core/src/dump.rs
@@ -129,7 +129,10 @@ fn norm_bar(track: &Track, bar: &MasterBar) -> NormBar {
         .iter()
         .filter_map(|voice| {
             let notes = voice_notes_in_bar(voice, bar);
-            (!notes.is_empty()).then_some(NormVoice { id: voice.id, notes })
+            (!notes.is_empty()).then_some(NormVoice {
+                id: voice.id,
+                notes,
+            })
         })
         .collect();
     // Canonical order independent of `track.voices` import order (ADR-0020).
diff --git a/core/src/novelty.rs b/core/src/novelty.rs
index 07331d9f..6907d05c 100644
--- a/core/src/novelty.rs
+++ b/core/src/novelty.rs
@@ -236,9 +236,10 @@ pub fn flag_phrase_duplicates(
                     #[allow(clippy::cast_precision_loss)]
                     let share = report.longest_match_notes as f64 / report.candidate_notes as f64;
                     match report.longest_match_reference {
-                        Some(of) if share >= min_quote_share => {
-                            Some(PhraseDuplicate { of, quote_share: share })
-                        }
+                        Some(of) if share >= min_quote_share => Some(PhraseDuplicate {
+                            of,
+                            quote_share: share,
+                        }),
                         _ => None,
                     }
                 }
diff --git a/core/src/split.rs b/core/src/split.rs
index 78935a94..2b2d61be 100644
--- a/core/src/split.rs
+++ b/core/src/split.rs
@@ -146,7 +146,10 @@ mod tests {
     fn cuts_snap_to_their_containing_bar() {
         // 3840 is bar 2's downbeat; 1920 is bar 1's, 5760 is bar 3's.
         assert_eq!(bar_segments(&bars(4), &[3840]), vec![0..2, 2..4]);
-        assert_eq!(bar_segments(&bars(4), &[1920, 5760]), vec![0..1, 1..3, 3..4]);
+        assert_eq!(
+            bar_segments(&bars(4), &[1920, 5760]),
+            vec![0..1, 1..3, 3..4]
+        );
     }
 
     #[test]
diff --git a/core/tests/dump_golden.rs b/core/tests/dump_golden.rs
index abda0476..bdd70925 100644
--- a/core/tests/dump_golden.rs
+++ b/core/tests/dump_golden.rs
@@ -40,7 +40,10 @@ fn sample_score() -> Score {
         pitch: pitch(64),
         velocity: Velocity::new(80).expect("valid velocity"),
         marks: NoteMarks::empty().with(NoteMark::Accent),
-        position: Some(NotePosition::explicit(FretboardPosition { string: 1, fret: 0 })),
+        position: Some(NotePosition::explicit(FretboardPosition {
+            string: 1,
+            fret: 0,
+        })),
     });
     let plain = AtomEvent::Note(AtomNote {
         absolute_start: Ticks(480),
diff --git a/core/tests/novelty.rs b/core/tests/novelty.rs
index 2d6ab670..63df24fc 100644
--- a/core/tests/novelty.rs
+++ b/core/tests/novelty.rs
@@ -439,5 +439,8 @@ fn flag_phrase_duplicates_compares_the_detected_track_on_both_sides() {
     let flags = flag_phrase_duplicates(&phrases, 1, 0.8);
     let dup = flags[1].expect("the track-1 repeat is flagged despite a different track 0");
     assert_eq!(dup.of, 0);
-    assert!(dup.quote_share >= 0.99, "the track-1 line is a verbatim repeat");
+    assert!(
+        dup.quote_share >= 0.99,
+        "the track-1 line is a verbatim repeat"
+    );
 }
diff --git a/core/tests/slice_extract.rs b/core/tests/slice_extract.rs
index bf5590db..90a8a3fb 100644
--- a/core/tests/slice_extract.rs
+++ b/core/tests/slice_extract.rs
@@ -51,7 +51,12 @@ fn bar(index: usize, start: u32) -> MasterBar {
 
 /// Four bars, one note on each downbeat (pitch 60 + bar index).
 fn four_bar_score() -> Score {
-    let notes = [note(0, 60), note(BAR, 61), note(2 * BAR, 62), note(3 * BAR, 63)];
+    let notes = [
+        note(0, 60),
+        note(BAR, 61),
+        note(2 * BAR, 62),
+        note(3 * BAR, 63),
+    ];
     Score {
         ticks_per_quarter: 480,
         master_bars: vec![bar(0, 0), bar(1, BAR), bar(2, 2 * BAR), bar(3, 3 * BAR)],
@@ -77,8 +82,7 @@ fn four_bar_score() -> Score {
 }
 
 fn onsets(score: &Score) -> Vec<(u32, u8)> {
-    score.tracks[0]
-        .voices[0]
+    score.tracks[0].voices[0]
         .event_groups
         .iter()
         .flat_map(|g| &g.atoms)
@@ -117,5 +121,8 @@ fn empty_range_yields_no_bars_and_out_of_range_end_clamps() {
     // End past the last bar clamps to what exists (all four bars here).
     let all = extract_bars(&four_bar_score(), 0..9);
     assert_eq!(all.master_bars.len(), 4);
-    assert_eq!(onsets(&all), vec![(0, 60), (BAR, 61), (2 * BAR, 62), (3 * BAR, 63)]);
+    assert_eq!(
+        onsets(&all),
+        vec![(0, 60), (BAR, 61), (2 * BAR, 62), (3 * BAR, 63)]
+    );
 }
diff --git a/core/tests/technique_tags.rs b/core/tests/technique_tags.rs
index 289d4ab2..34bec0a3 100644
--- a/core/tests/technique_tags.rs
+++ b/core/tests/technique_tags.rs
@@ -83,11 +83,26 @@ fn maps_spans_and_marks_to_direct_tags_and_a_superset_name_list() {
     assert!(d.tags.contains(&SwancoreTag::ArtificialHarmonic));
     // Legato and accent have no dedicated SwancoreTag — they must NOT be tagged…
     assert!(!d.tags.contains(&SwancoreTag::NaturalHarmonic));
-    assert_eq!(d.tags.len(), 3, "only the directly-taggable techniques: {:?}", d.tags);
+    assert_eq!(
+        d.tags.len(),
+        3,
+        "only the directly-taggable techniques: {:?}",
+        d.tags
+    );
 
     // …but the free-form name list is the superset and records them anyway.
-    for name in ["hammer_on", "palm_mute", "legato", "pinch_harmonic", "accent"] {
-        assert!(d.names.contains(&name.to_owned()), "names missing {name}: {:?}", d.names);
+    for name in [
+        "hammer_on",
+        "palm_mute",
+        "legato",
+        "pinch_harmonic",
+        "accent",
+    ] {
+        assert!(
+            d.names.contains(&name.to_owned()),
+            "names missing {name}: {:?}",
+            d.names
+        );
     }
 }
 
@@ -95,7 +110,10 @@ fn maps_spans_and_marks_to_direct_tags_and_a_superset_name_list() {
 fn let_ring_span_derives_the_let_ring_tag_and_name() {
     // let-ring is newly parsed from GP (#75): a LetRing span must auto-derive
     // both the dedicated SwancoreTag::LetRing and the "let_ring" name.
-    let d = derive_techniques(&score_with(&[SpanTechnique::LetRing], NoteMarks::empty()), 0);
+    let d = derive_techniques(
+        &score_with(&[SpanTechnique::LetRing], NoteMarks::empty()),
+        0,
+    );
     assert_eq!(d.tags, vec![SwancoreTag::LetRing]);
     assert_eq!(d.names, vec!["let_ring".to_owned()]);
 }
@@ -103,7 +121,10 @@ fn let_ring_span_derives_the_let_ring_tag_and_name() {
 #[test]
 fn presence_only_so_repeats_dedupe_and_output_is_deterministic() {
     // The same technique across groups/notes is "present", counted once.
-    let score = score_with(&[SpanTechnique::Slide, SpanTechnique::Slide], NoteMarks::empty());
+    let score = score_with(
+        &[SpanTechnique::Slide, SpanTechnique::Slide],
+        NoteMarks::empty(),
+    );
     let a = derive_techniques(&score, 0);
     let b = derive_techniques(&score, 0);
     assert_eq!(a, b, "pure function of the score (SPEC §6)");
@@ -125,7 +146,11 @@ fn merge_tags_keeps_chosen_order_and_appends_only_new_derived() {
     // HammerOn was already chosen → not duplicated; PalmMute is appended.
     assert_eq!(
         merge_tags(&chosen, &derived),
-        vec![SwancoreTag::Intro, SwancoreTag::HammerOn, SwancoreTag::PalmMute]
+        vec![
+            SwancoreTag::Intro,
+            SwancoreTag::HammerOn,
+            SwancoreTag::PalmMute
+        ]
     );
     // Idempotent: merging the result again changes nothing.
     let once = merge_tags(&chosen, &derived);
@@ -158,7 +183,11 @@ fn derives_from_all_voices_like_structure_measures() {
         }],
     });
     let d = derive_techniques(&score, 0);
-    assert!(d.tags.contains(&SwancoreTag::PalmMute), "secondary-voice span: {:?}", d.tags);
+    assert!(
+        d.tags.contains(&SwancoreTag::PalmMute),
+        "secondary-voice span: {:?}",
+        d.tags
+    );
     assert!(
         d.tags.contains(&SwancoreTag::ArtificialHarmonic),
         "secondary-voice mark: {:?}",