dsh-ptc-plus

DSH's PTC mode starts every run_code call from a blank environment. Variables, imports, and results computed in one call are gone the next; fixing a single typo means resending the entire code block; and static import or export declarations are invalid inside the async function body. Pasting the same setup block over and over, resending a whole block to change one line—these are the biggest daily frictions of working in PTC mode. PTC Plus wires run_code into a session-bound, persistent TypeScript REPL so each call continues from the state of the last.

Three capabilities make the difference most visible. State persists across calls: variables, named and default imports, and special values such as BigInt, Map, and Set remain available, so setup code ships once. edit_run_code lets you fix a result without resending: you submit only the changed line or lines; exact-text and regex replacements are guarded against bad patterns, and when a rejected cell is uniquely diagnosed as missing a single closing character the diagnostic emits a ready-to-run correction call carrying an expected_target_call_seq precondition. Module syntax is adapted transparently: a pre-execution AST pass rewrites static import and export into equivalent constructs valid inside an async function body, so the model writes idiomatic ESM without sensing the underlying constraint. Supporting features include output truncation with precise error-line references, session-level relative-path memory, agent tool context recovery, an enhanced tool card, and cold recovery.

It is built for developers who already run DSH's PTC preset and call run_code frequently for prototyping or data exploration. One caveat: PTC Plus is designed for danger-full-access. The worker can reach Node.js and the operating system directly with no additional sandbox, so enable it only in environments where that level of trust is acceptable. If you spend every day re-pasting setup blocks and resending entire code blocks to fix a one-line change, PTC Plus is the lowest-friction upgrade.