first commit

pigo/internal/memory/schema.go

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+package memory
+
+// Scope identifies the memory dimension a file belongs to.
+type Scope string
+
+// Recognized scopes.
+const (
+	ScopeGlobal   Scope = "global"
+	ScopeProjects Scope = "projects"
+	ScopeSessions Scope = "sessions"
+	ScopeCC       Scope = "cc"
+)
+
+// Type identifies the semantic kind of a memory file.
+type Type string
+
+// Recognized types.
+const (
+	TypeUser       Type = "user"
+	TypeFeedback   Type = "feedback"
+	TypeProject    Type = "project"
+	TypeReference  Type = "reference"
+	TypeCheckpoint Type = "checkpoint"
+	TypeProgress   Type = "progress"
+	TypeNotes      Type = "notes"
+	TypeFree       Type = "free"
+)
+
+// schemaDDL is the idempotent set of DDL statements that create the memory
+// storage schema: the content table, its secondary indexes, the FTS5 virtual
+// table (external-content mode), and the three sync triggers that keep the FTS
+// index consistent with the content table. All statements use IF NOT EXISTS so
+// running the migration repeatedly is safe.
+const schemaDDL = `
+CREATE TABLE IF NOT EXISTS memory_index (
+  id INTEGER PRIMARY KEY,
+  path TEXT NOT NULL UNIQUE,
+  scope TEXT NOT NULL,
+  scope_id TEXT NOT NULL DEFAULT '',
+  type TEXT NOT NULL,
+  body TEXT NOT NULL,
+  fingerprint TEXT NOT NULL,
+  last_indexed_at INTEGER NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS memory_index_scope_idx ON memory_index (scope, scope_id);
+CREATE INDEX IF NOT EXISTS memory_index_type_idx ON memory_index (type);
+
+CREATE VIRTUAL TABLE IF NOT EXISTS memory_fts USING fts5(
+  body, content='memory_index', content_rowid='id',
+  tokenize='unicode61 remove_diacritics 1'
+);
+
+CREATE TRIGGER IF NOT EXISTS memory_ai AFTER INSERT ON memory_index BEGIN
+  INSERT INTO memory_fts(rowid, body) VALUES (new.id, new.body);
+END;
+
+CREATE TRIGGER IF NOT EXISTS memory_ad AFTER DELETE ON memory_index BEGIN
+  INSERT INTO memory_fts(memory_fts, rowid, body) VALUES('delete', old.id, old.body);
+END;
+
+CREATE TRIGGER IF NOT EXISTS memory_au AFTER UPDATE ON memory_index BEGIN
+  INSERT INTO memory_fts(memory_fts, rowid, body) VALUES('delete', old.id, old.body);
+  INSERT INTO memory_fts(rowid, body) VALUES (new.id, new.body);
+END;
+`