Verify genuine Google music constraints and separate metadata cache revisions

README.md

@@ -39,6 +39,13 @@ sound.
 Use **All files** to narrow results by folder, file extension, modification
 date, file size or media duration. Choose a result to inspect it before opening.
 
+The current source also offers **Artist (exact)** and **Track title (exact)**
+filters for music. Enter the complete tag, with or without a text query. These
+filters ignore letter case and surrounding spaces; files without the matching
+music tag stay out of the results. Existing indexes need a media indexing pass
+before these new filters can use their tags. This improvement is not yet in the
+v0.1.4 downloads.
+
 ### Find the implementation
 
 Choose **Code** in the **All files** filters to search source files. Look up a

crates/searchi-service/README.md

@@ -44,6 +44,7 @@ unchanged-vector reuse and production platform checks remain release gates.
 
 Exact artist/title constraints use the core's normalized structured probe keys
 before ANN limits and in the eligibility cache key. Metadata-only writes advance
-the corpus revision and dirty path so warmed readers cannot retain old eligibility.
+a separate durable metadata epoch so warmed readers cannot retain old eligibility.
+They do not change source-corpus revisions during the indexer's own probe publication.
 Empty metadata-only hybrid requests use core results without model inference.
 These explicit constraints do not establish abstention for free-form topic queries.

crates/searchi-service/src/store.rs

@@ -33,6 +33,7 @@ struct FilterKey {
     code_only: bool,
     media_artist: Option<String>,
     media_title: Option<String>,
+    metadata_revision: i64,
 }
 
 struct EligibilityCache {
@@ -186,16 +187,18 @@ impl Store {
             }
         }
         initialization.execute_batch("CREATE TABLE IF NOT EXISTS semantic_media_errors(generation INTEGER NOT NULL REFERENCES semantic_generations(id) ON DELETE CASCADE,path TEXT NOT NULL,message TEXT NOT NULL,PRIMARY KEY(generation,path))")?;
-        // Metadata-only writes change strict eligibility even when file bytes do not change.
-        for (name, event, row) in [
-            ("insert", "INSERT", "new"),
-            ("update", "UPDATE", "new"),
-            ("delete", "DELETE", "old"),
+        // Probe publication changes filter eligibility, not source discovery identity.
+        // Keep its epoch separate so indexing does not invalidate its own corpus snapshot.
+        initialization.execute_batch("CREATE TABLE IF NOT EXISTS semantic_media_metadata_revision(singleton INTEGER PRIMARY KEY CHECK(singleton=1), revision INTEGER NOT NULL);
+            INSERT OR IGNORE INTO semantic_media_metadata_revision(singleton,revision) VALUES(1,0);")?;
+        for (name, event) in [
+            ("insert", "INSERT"),
+            ("update", "UPDATE"),
+            ("delete", "DELETE"),
         ] {
-            initialization.execute_batch(&format!("CREATE TRIGGER IF NOT EXISTS semantic_media_metadata_{name} AFTER {event} ON media_metadata BEGIN
-                UPDATE semantic_meta SET corpus_revision=corpus_revision+1 WHERE singleton=1;
-                INSERT INTO semantic_dirty_paths(path,revision) VALUES({row}.path,(SELECT corpus_revision FROM semantic_meta WHERE singleton=1))
-                ON CONFLICT(path) DO UPDATE SET revision=excluded.revision; END;"))?;
+            initialization.execute_batch(&format!("DROP TRIGGER IF EXISTS semantic_media_metadata_{name};
+                CREATE TRIGGER semantic_media_metadata_{name} AFTER {event} ON media_metadata BEGIN
+                UPDATE semantic_media_metadata_revision SET revision=revision+1 WHERE singleton=1; END;"))?;
         }
         incremental::migrate(&initialization)?;
         initialization.commit()?;
@@ -646,6 +649,19 @@ impl Store {
             .map(|ext| ext.trim_start_matches('.').to_ascii_lowercase());
         let min_size = options.min_size.map(i64::try_from).transpose()?;
         let max_size = options.max_size.map(i64::try_from).transpose()?;
+        let metadata_revision = if options.media_artist.is_some()
+            || options.media_title.is_some()
+            || options.min_duration_ms.is_some()
+            || options.max_duration_ms.is_some()
+        {
+            snapshot.query_row(
+                "SELECT revision FROM semantic_media_metadata_revision WHERE singleton=1",
+                [],
+                |row| row.get(0),
+            )?
+        } else {
+            0
+        };
         let filter = FilterKey {
             folder,
             extension,
@@ -667,6 +683,7 @@ impl Store {
                 .as_deref()
                 .map(searchi_core::normalize_media_field)
                 .transpose()?,
+            metadata_revision,
         };
         trace.end(filter_span, Default::default());
         let eligibility_span = trace.begin("semantic.eligibility", parent);
@@ -1403,6 +1420,11 @@ mod tests {
                 .len(),
             1
         );
+        let corpus_before: i64 = store.connection.query_row(
+            "SELECT corpus_revision FROM semantic_meta WHERE singleton=1",
+            [],
+            |row| row.get(0),
+        )?;
         tags.insert("artist".into(), "Replacement".into());
         lexical.set_structured_media_metadata_at_revision(
             &path,
@@ -1412,6 +1434,15 @@ mod tests {
             identity.modified_ns,
             revision,
         )?;
+        let corpus_after: i64 = store.connection.query_row(
+            "SELECT corpus_revision FROM semantic_meta WHERE singleton=1",
+            [],
+            |row| row.get(0),
+        )?;
+        assert_eq!(
+            corpus_before, corpus_after,
+            "Probe publication must not invalidate source discovery"
+        );
         assert!(store
             .search(&vector, "metadata-filter-proof", 1, &options)?
             .is_empty());

crates/searchi-service/tests/media_constraints_google_cpu.rs

@@ -0,0 +1,140 @@
+//! Explicit identities constrain genuine Google media retrieval, without a cosine cutoff.
+use anyhow::{Context, Result};
+use searchi_core::{IndexOptions, SearchIndex};
+use searchi_service::{FfmpegTools, HybridSearch, MediaLimits, SearchOptions};
+use std::{fs, path::Path, process::Command, sync::atomic::AtomicBool};
+
+fn tagged_tone(ffmpeg: &Path, path: &Path, artist: &str, title: &str) -> Result<()> {
+    let output = Command::new(ffmpeg)
+        .args([
+            "-hide_banner",
+            "-loglevel",
+            "error",
+            "-nostdin",
+            "-threads",
+            "1",
+            "-f",
+            "lavfi",
+            "-i",
+            "sine=frequency=440:sample_rate=16000:duration=2",
+            "-c:a",
+            "pcm_s16le",
+            "-metadata",
+        ])
+        .arg(format!("artist={artist}"))
+        .arg("-metadata")
+        .arg(format!("title={title}"))
+        .arg(path)
+        .output()?;
+    anyhow::ensure!(
+        output.status.success(),
+        "Owned FFmpeg fixture creation failed: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+    Ok(())
+}
+
+#[test]
+#[ignore = "Requires verified Google assets, normal native worker and FFmpeg helpers; CPU only"]
+fn genuine_google_exact_music_constraints_survive_publication_and_hint_refresh() -> Result<()> {
+    assert_eq!(
+        std::env::var("SEARCHI_FORCE_CPU")?,
+        "1",
+        "VM inference must use CPU only"
+    );
+    let model =
+        std::env::var_os("SEARCHI_GEMMA_MODEL_DIR").context("Set SEARCHI_GEMMA_MODEL_DIR")?;
+    let worker = std::env::var_os("SEARCHI_GEMMA_WORKER").context("Set SEARCHI_GEMMA_WORKER")?;
+    let tools = FfmpegTools {
+        ffmpeg: std::env::var_os("SEARCHI_TEST_FFMPEG")
+            .context("Set SEARCHI_TEST_FFMPEG")?
+            .into(),
+        ffprobe: std::env::var_os("SEARCHI_TEST_FFPROBE")
+            .context("Set SEARCHI_TEST_FFPROBE")?
+            .into(),
+    };
+    let temp = tempfile::tempdir()?;
+    let root = temp.path().join("music");
+    fs::create_dir(&root)?;
+    let target = root.join("z-target.wav");
+    tagged_tone(&tools.ffmpeg, &target, "Björk", "Jóga")?;
+    // Identical audio is a deliberately strong distractor; identity must come from tags.
+    tagged_tone(
+        &tools.ffmpeg,
+        &root.join("a-distractor.wav"),
+        "Other Artist",
+        "Björk",
+    )?;
+    let db = temp.path().join("index.db");
+    let mut lexical = SearchIndex::open(&db)?;
+    lexical.index_folder(&root)?;
+    let mut indexer = HybridSearch::open(&db, &model, &worker, 1)?;
+    assert_eq!(
+        indexer.worker_info().context("Google worker info")?.device,
+        "cpu"
+    );
+    let report = indexer.index_embeddings_with_media(&tools, &MediaLimits::default())?;
+    assert!(report.failures.is_empty());
+    assert_eq!(report.media_files, 2);
+    assert_eq!(report.audio_inference_calls, 2);
+    drop(indexer);
+    let mut search = HybridSearch::open_query(&db, &model, &worker, 1)?;
+    let options = SearchOptions {
+        media_artist: Some("BJÖRK".into()),
+        media_title: Some("JÓGA".into()),
+        ..Default::default()
+    };
+    let metadata = search.search_measured("", 1, &options, true)?;
+    assert_eq!(metadata.results.len(), 1);
+    assert_eq!(metadata.results[0].filename, "z-target.wav");
+    assert!(!metadata
+        .metrics
+        .trace
+        .context("debug trace")?
+        .iter()
+        .any(|span| span.name == "semantic.query_embedding"));
+    let query = "the sound of a sine wave tone";
+    let semantic = search.search_semantic(query, 1, &options)?;
+    assert_eq!(semantic.len(), 1);
+    assert_eq!(semantic[0].filename, "z-target.wav");
+    assert_eq!(
+        search.search(query, 1, &options)?[0].filename,
+        "z-target.wav"
+    );
+    let absent = SearchOptions {
+        media_artist: Some("Absent Artist".into()),
+        ..Default::default()
+    };
+    assert!(search.search(query, 1, &absent)?.is_empty());
+    assert!(search.search("", 1, &absent)?.is_empty());
+    let collision = SearchOptions {
+        media_artist: Some("Jóga".into()),
+        ..Default::default()
+    };
+    assert!(search.search(query, 1, &collision)?.is_empty());
+    // A native same-stat hint invalidates old tags and warmed ANN eligibility.
+    let canonical = target.canonicalize()?;
+    lexical.index_paths_cancellable(
+        &root,
+        std::slice::from_ref(&canonical),
+        &IndexOptions::default(),
+        &AtomicBool::new(false),
+    )?;
+    assert!(search.search("", 1, &options)?.is_empty());
+    assert!(search.search_semantic(query, 1, &options)?.is_empty());
+    let mut indexer = HybridSearch::open(&db, &model, &worker, 1)?;
+    let refreshed = indexer.index_embeddings_with_media(&tools, &MediaLimits::default())?;
+    assert!(refreshed.failures.is_empty());
+    drop(indexer);
+    assert_eq!(search.search("", 1, &options)?[0].filename, "z-target.wav");
+    assert_eq!(
+        search.search_semantic(query, 1, &options)?[0].filename,
+        "z-target.wav"
+    );
+    // Deletion is suppressed without retaining an exact identity match.
+    fs::remove_file(&target)?;
+    lexical.index_folder(&root)?;
+    assert!(search.search("", 1, &options)?.is_empty());
+    assert!(search.search_semantic(query, 1, &options)?.is_empty());
+    Ok(())
+}

docs/MEDIA-CONSTRAINTS.md

@@ -0,0 +1,56 @@
+# Exact music identity filters
+
+The current source supports exact `media_artist` and `media_title` constraints
+in the desktop filter panel, CLI and read-only MCP. They compare genuine probed
+full tag fields using Unicode lowercase and trimmed outer whitespace. Both
+constraints combine with existing filters before lexical and ANN candidate
+limits; comment text cannot impersonate an artist or title.
+
+A metadata-only request can omit query text. It returns a bounded stable list
+without query inference. Missing tags yield no match, including in semantic
+search. This is a narrow, explicit constraint, not general natural-language
+no-answer detection. Blank or over-1024-byte request fields fail explicitly;
+oversized genuine tags remain keyword-searchable but have no exact identity key.
+
+SQLite schema 14 preserves legacy keyword tags without guessing structured
+identities from flattened text. Existing music needs a media indexing pass to
+populate the new fields. A separate durable metadata epoch refreshes filtered eligibility without changing
+the source-corpus snapshot during indexing. Metadata revision guards, same-stat event invalidation,
+deletions and eligibility-cache invalidation retain source freshness.
+
+CLI examples:
+
+```sh
+searchi search --db /path/to/index.db --media-artist "Nina Simone"
+searchi search --db /path/to/index.db --media-title "Feeling Good"
+searchi search --db /path/to/index.db "live recording" --media-artist "Nina Simone"
+```
+
+Replace `/path/to/index.db` with your existing media-indexed database. The desktop controls are **Artist (exact)** and
+**Track title (exact)**. v0.1.4 downloads predate these additions.
+
+Windows CPU checks: the full ordinary workspace suite passed (asset-dependent
+checks remain explicitly ignored). Shared migration/lifecycle/eligibility tests, five CLI unit
+tests including real MCP response, 48 native desktop tests and 61 frontend tests
+passed. Strict workspace/CLI/native Clippy and formatting passed; frontend build
+passed. Native visual interaction remains unexecuted. Actual Google CPU integration also passed in 58.59 seconds (whole test, not
+search latency): two owned two-second 16 kHz mono PCM WAVs carried real
+artist/title tags and identical audio. The initial generation made two actual
+audio encodes. Query-role semantic and hybrid searches with limit one returned
+the eligible file, absent artist/field-collision constraints returned empty,
+metadata-only traces contained no query embedding, and same-stat invalidation,
+actual media refresh and deletion remained correct with warmed readers.
+
+The normal auto worker was forced to CPU with one thread. Its SHA-256 was
+`c01cb3ec13cfca722ee768e8350e1399a8b9a4d14a24a35adc3473a5cfc82a73`.
+The first integration run failed because metadata publication advanced the
+source-corpus revision; the separate metadata epoch corrected this, and the
+rerun passed. Service tests and strict workspace Clippy passed after the fix.
+This tiny identity-contract test does not measure music understanding or general
+no-answer quality.
+
+Reproduce with verified assets/helpers and `SEARCHI_FORCE_CPU=1`:
+
+```sh
+cargo test -p searchi-service --test media_constraints_google_cpu --locked -- --ignored --nocapture --test-threads=1
+```

docs/MUSIC-METADATA.md

@@ -0,0 +1,76 @@
+# Music metadata hypothesis: actual Google CPU diagnostic
+
+This known two-file diagnostic compares real audio evidence with real embedded
+metadata. It does **not** change production ranking or establish independent
+music quality, general abstention, or a higher media rating.
+
+The preserved v1 run encoded eleven default audio windows and two whole-tag
+passages. Adding the whole passage left music memories at **2/4 first hits**:
+the violin's English similarity increased, but stayed below the wrong piano.
+
+The subsequent v2 policy was frozen in source commit `7055004` before inference.
+It encodes artist, title, album, genre and composer separately, in fixed order
+with a shared 2048-byte UTF-8 budget and the neutral document title `File metadata`.
+The file score is the maximum of its actual evidence, with no weights or cutoff.
+This is a hypothesis motivated by v1, not untouched held-out testing.
+
+## Recomputed results
+
+All 65 original queries remain in the report. Three filter queries are explicitly
+unsupported. Among 62 executed queries, only seven positive queries name one of
+the two candidates; 50 positives name files outside this deliberately limited
+pool and cannot receive a quality score. Five unfiltered no-answer queries remain.
+
+| Two-file diagnostic | Audio only | Whole tags v1 | Individual fields v2 |
+| --- | ---: | ---: | ---: |
+| Music memories: correct first file | 2/4 | 2/4 | 4/4 |
+| Music identity queries: correct first file | 2/3 | 2/3 | 3/3 |
+| All eligible positives: correct first file | 4/7 | 4/7 | 7/7 |
+| Eligible positives: recall within first five | 7/7 | 7/7 | 7/7 |
+| Eligible positive MRR | 0.786 | 0.786 | 1.000 |
+| No-answer queries returning candidates, failure | 5/5 | 5/5 | 5/5 |
+
+The first-hit gains are `q049`, `q050` and `q056`, with no scored positive
+regression. English violin selected the literal composer field
+`Violinist WTD/LPC Jazz Band` (cosine 0.73714); German violin selected the actual
+title `Jazz Violin Solo` (0.73508). Their wrong piano audio maxima were 0.68972
+and 0.70654 respectively. The piano memories retained their original audio hits.
+
+This improvement also strengthens unrelated nearest neighbors: the purple-elephant
+violin negatives increased by 0.04994 and 0.04801 cosine, and the German quantum
+entanglement negative by 0.00749. All negatives still return files. Consequently,
+the diagnostic provides **no abstention improvement** and no safe rejection
+threshold. Metadata is useful evidence, not a calibrated confidence score.
+
+## Inputs, execution and limits
+
+The actual piano tags identify Kimiko Ishizaka, Goldberg Variation 13, Classical
+and J.S. Bach. The violin tags identify Violinist WTD, Jazz Violin Solo, Jazz and
+the LPC Jazz Band. No instrument descriptions were generated from the waveform.
+Blank/missing whitelisted fields add no vector; encoder, comments, URLs and
+copyright are excluded. Misleading tags remain unverified literal evidence.
+Metadata citations have a field and text, never an invented playback timestamp.
+
+V2 used actual Google EmbeddingGemma 2 Q8 through the same native
+`b11461-no-logits-v1` worker on CPU, one thread, 768 dimensions and a 2048-token
+indexing context. Ten field encodes took **750.03 ms**, excluding model startup
+and query inference. It made **zero audio inference calls**: per-query audio
+maxima were reused verbatim from the SHA-verified v1 report. Independent read-only
+recomputation checked query equality and exact retained audio/whole-tag rankings
+for all 62 executed rows. This tiny shared-VM measurement is not a throughput
+guarantee or a production ANN/hybrid measurement.
+
+- Frozen v2 plan SHA-256:
+  `566bcd608ccf898abaceab32b247786e895368c8428b1bfa6e0bbb8396211b05`.
+- Preserved v1 report SHA-256:
+  `f985ba639a14b8c0288b8fa7812d580f179f31c8cad0c21d67531c8a4fddc5b6`.
+- Ignored v2 report `.searchi/qa/music-fields-v2-results.json`, 288944 bytes,
+  SHA-256 `c13ceca2150059a21e10ee190893a66f5ac82570675e7725e54524c660a2ff30`.
+
+Reproduction commands and structural tests are in the
+[evaluation tool README](../tools/media-eval/README.md). Before deployment,
+evaluate independently frozen unseen music, missing/misleading metadata, additional
+instrument/style hard negatives and the complete mixed candidate pool. Production
+integration must retain real metadata field citations, source-byte/revision guards,
+strict filters and generation policy invalidation. The broader
+[media quality gates and experimental rating](MEDIA-QUALITY.md) remain unchanged.

docs/ROADMAP.md

@@ -12,8 +12,24 @@ timestamps and irrelevant results when the requested content is absent. The
 million-record lexical benchmark is deferred while this quality work proceeds.
 Google EmbeddingGemma 2 remains the main text/image/audio/video search model.
 
-- [ ] Evaluate actual whitelisted music metadata as additional Google text evidence, retaining raw audio and real metadata source citations.
-- [ ] Evaluate finer local ASR token/word timing and source-preserving phrase windows with Google text retrieval; preserve every competitor and reject invalid timestamps.
+- [x] Run frozen actual Google music metadata diagnostics: separate fields improved
+  known two-file music memories from 2/4 to 4/4; no-answer remained 5/5 failing.
+  This is hypothesis evidence, not independent production validation.
+  See [music evidence](MUSIC-METADATA.md).
+- [ ] Validate and integrate metadata embeddings on independent unseen music and
+  the full mixed pool with real field citations and stale-source guards.
+- [x] Implement exact artist/title constraints in shared storage, lexical/ANN
+  eligibility, CLI/MCP and desktop controls; metadata-only search skips inference.
+  Unit/lifecycle evidence is recorded separately from actual model validation.
+- [x] Actual Google CPU constraint integration passed with genuine tagged WAVs,
+  semantic/hybrid limit-one retrieval, empty absent identities, no-inference
+  metadata lookup and warmed lifecycle refresh; see [evidence](MEDIA-CONSTRAINTS.md).
+- [ ] Package and install an updated desktop release with these exact filters.
+- [ ] Evaluate finer local ASR token/word timing and source-preserving phrase windows
+  with Google text retrieval. Ordinary-token run completed but failed interval
+  validation; DTW run stopped on invalid native UTF-8 and remains incomplete.
+  Neither receives an accepted score. Future diagnostics retain bounded failing
+  raw bytes and atomic checkpoints; see tools/speech-eval/README.md.
 - [ ] Validate richer no-answer evidence on new independent positive/negative data; do not retune the failed universal cosine cutoff on old held-out results.
 - [ ] Integrate accepted improvements into shared engine/UI/headless clients with verified setup, lifecycle and CPU performance evidence. Diagnostics alone do not raise the media quality rating.
 - [x] Publish v0.1.0 Windows installer/checksum, verify public download bytes,