Phase 2: Claude integration layer

- Add @anthropic-ai/claude-agent-sdk dependency
- Implement src/main/claude/phases.ts with phase configs (research/plan/implement)
- Implement src/main/claude/index.ts with SDK wrapper
  - query() integration with session management
  - Session resume support
  - Artifact read/write utilities
  - Phase advancement logic

1 files changed, 35 insertions, 0 deletions

diff --git a/src/main/db/schema.ts b/src/main/db/schema.ts
new file mode 100644
index 0000000..c2093f9
--- /dev/null
+++ b/src/main/db/schema.ts
@@ -0,0 +1,35 @@
+import Database from "better-sqlite3";
+
+export function initSchema(db: Database.Database) {
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS projects (
+      id TEXT PRIMARY KEY,
+      name TEXT NOT NULL,
+      path TEXT NOT NULL,
+      created_at INTEGER NOT NULL DEFAULT (unixepoch()),
+      updated_at INTEGER NOT NULL DEFAULT (unixepoch())
+    );
+
+    CREATE TABLE IF NOT EXISTS sessions (
+      id TEXT PRIMARY KEY,
+      project_id TEXT NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+      name TEXT NOT NULL,
+      phase TEXT NOT NULL DEFAULT 'research',
+      claude_session_id TEXT,
+      permission_mode TEXT NOT NULL DEFAULT 'acceptEdits',
+      created_at INTEGER NOT NULL DEFAULT (unixepoch()),
+      updated_at INTEGER NOT NULL DEFAULT (unixepoch())
+    );
+
+    CREATE TABLE IF NOT EXISTS messages (
+      id TEXT PRIMARY KEY,
+      session_id TEXT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+      role TEXT NOT NULL,
+      content TEXT NOT NULL,
+      created_at INTEGER NOT NULL DEFAULT (unixepoch())
+    );
+
+    CREATE INDEX IF NOT EXISTS idx_sessions_project ON sessions(project_id);
+    CREATE INDEX IF NOT EXISTS idx_messages_session ON messages(session_id);
+  `);
+}