feat(agents-api): Tweak the proximity indices

Signed-off-by: Diwank Singh Tomer <[email protected]>

agents-api/migrations/migrate_1729114011_tweak_proximity_indices.py

@@ -0,0 +1,92 @@
+#/usr/bin/env python3
+
+MIGRATION_ID = "tweak_proximity_indices"
+CREATED_AT = 1729114011.022733
+
+
+def run(client, *queries):
+    joiner = "}\n\n{"
+
+    query = joiner.join(queries)
+    query = f"{{\n{query}\n}}"
+    client.run(query)
+
+
+drop_snippets_lsh_index = dict(
+    up="""
+    ::lsh drop snippets:lsh
+    """,
+    down="""
+    ::lsh create snippets:lsh {
+        extractor: content,
+        tokenizer: Simple,
+        filters: [Stopwords('en')],
+        n_perm: 200,
+        target_threshold: 0.9,
+        n_gram: 3,
+        false_positive_weight: 1.0,
+        false_negative_weight: 1.0,
+    }
+    """,
+)
+
+snippets_lsh_index = dict(
+    up="""
+    ::lsh create snippets:lsh {
+        extractor: content,
+        tokenizer: Simple,
+        filters: [Lowercase, AsciiFolding, Stemmer('english'), Stopwords('en')],
+        n_perm: 200,
+        target_threshold: 0.5,
+        n_gram: 2,
+        false_positive_weight: 1.0,
+        false_negative_weight: 1.0,
+    }
+    """,
+    down="""
+    ::lsh drop snippets:lsh
+    """,
+)
+
+# See: https://docs.cozodb.org/en/latest/vector.html#full-text-search-fts
+drop_snippets_fts_index = dict(
+    down="""
+    ::fts create snippets:fts {
+        extractor: content,
+        tokenizer: Simple,
+        filters: [Lowercase, Stemmer('english'), Stopwords('en')],
+    }
+    """,
+    up="""
+    ::fts drop snippets:fts
+    """,
+)
+
+# See: https://docs.cozodb.org/en/latest/vector.html#full-text-search-fts
+snippets_fts_index = dict(
+    up="""
+    ::fts create snippets:fts {
+        extractor: content,
+        tokenizer: Simple,
+        filters: [Lowercase, AsciiFolding, Stemmer('english'), Stopwords('en')],
+    }
+    """,
+    down="""
+    ::fts drop snippets:fts
+    """,
+)
+
+queries_to_run = [
+    drop_snippets_lsh_index,
+    drop_snippets_fts_index,
+    snippets_lsh_index,
+    snippets_fts_index,
+]
+
+
+def up(client):
+    run(client, *[q["up"] for q in queries_to_run])
+
+
+def down(client):
+    run(client, *[q["down"] for q in reversed(queries_to_run)])