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* feat: make tsgo --singleThreaded configurable via env var Set PNPM_TYPECHECK_SINGLE_THREADED=false to allow tsgo to use multiple threads during typechecking. Defaults to true (preserving current behavior) for environments where memory is constrained. https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * feat: replace binary PNPM_TYPECHECK_SINGLE_THREADED with configurable PNPM_TYPECHECK_THREADING Replace the binary on/off env var with PNPM_TYPECHECK_THREADING that accepts three modes: auto, single-threaded, multi-threaded. Resolution order: 1. PNPM_TYPECHECK_THREADING env var 2. .pnpm-typecheck.json config file (git-ignored, per-developer) 3. Default: "auto" Auto mode checks system memory: <8GB uses single-threaded, >=8GB uses multi-threaded. https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: simplify threading mode resolution Move validation into the default branch of the switch, removing the ThreadingMode type and VALID_THREADING_MODES set. readThreadingMode now returns { mode: string, source: string } so error messages indicate where the invalid value came from. https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: error on invalid threading mode instead of warning https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: remove auto-detect log message https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: use string literal union type for threading source https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * revert: revert source type back to string https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: remove try-catch, let parse errors propagate to user https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * refactor: simplify auto case to return directly https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * fix: normalize and validate threading mode input Trim whitespace and lowercase env var and config file values so that empty/whitespace-only strings fall through to the default, and case-insensitive values like "Auto" or "SINGLE-THREADED" are accepted. https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * style: use single quotes for string without interpolation https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE * feat: support .local-settings dir for typecheck config shared across worktrees Read pnpm-typecheck.json from .local-settings/ directory (with fallback to the old .pnpm-typecheck.json location). The worktree-new script now symlinks .local-settings alongside .claude so the config is shared across all worktrees without manual copying. https://claude.ai/code/session_01MRhydwHLce7vwZDkf1yvzE --------- Co-authored-by: Claude <noreply@anthropic.com>