Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-fast-worktree/src/db/schema.rs

@@ -0,0 +1,35 @@
+pub const SCHEMA_VERSION: u32 = 1;
+
+pub const INIT_SQL: &str = r#"
+PRAGMA busy_timeout = 5000;
+
+CREATE TABLE IF NOT EXISTS meta (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS worktrees (
+    id TEXT PRIMARY KEY,
+    path TEXT UNIQUE NOT NULL,
+    source_repo TEXT NOT NULL,
+    repo_name TEXT NOT NULL,
+    kind TEXT NOT NULL DEFAULT 'session',
+    creation_mode TEXT NOT NULL DEFAULT 'linked',
+    git_ref TEXT,
+    head_commit TEXT,
+    session_id TEXT,
+    creator_pid INTEGER,
+    created_at INTEGER NOT NULL,
+    last_accessed_at INTEGER,
+    status TEXT NOT NULL DEFAULT 'alive',
+    metadata TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_worktrees_repo ON worktrees(repo_name);
+CREATE INDEX IF NOT EXISTS idx_worktrees_status_kind ON worktrees(status, kind);
+CREATE INDEX IF NOT EXISTS idx_worktrees_session ON worktrees(session_id);
+CREATE INDEX IF NOT EXISTS idx_worktrees_created ON worktrees(created_at);
+"#;
+
+pub const UPSERT_META: &str = "INSERT OR REPLACE INTO meta(key, value) VALUES (?1, ?2)";
+pub const GET_META: &str = "SELECT value FROM meta WHERE key = ?1";