Cline ships v4.1.15 amid a week of desktop, telemetry, and tool-signature fixes

Cline's v4.1.15 release lands after a week that surfaced and patched several stability and privacy issues across the agent stack. The desktop plugins crash on launch was traced to the bundled Node's npm on Windows, and this release ships a fix [1]. Telemetry also got attention: `task.completed` is now emitted from every session teardown path, closing a hole where sessions could end without the event firing [2]. Hook telemetry and CVEs were addressed as well, rounding out a release that reads more like hardening than new features [3].

A separate Cline fix prevents the search tool from crashing the process on giant single-line files, closing a memory hole that could take down the agent [4]. Tool signatures are now enforced before execution, a safety change that stops invalid calls before they reach the runtime [ref:-]. This is a breaking change for agents relying on loosely-typed tool calls.

The week also brought desktop UX overhauls and settings polish [5]. The Customize hub, sidebar overhaul, and settings polish landed [6], alongside a toggle to stop showing cost estimates for subscription-billed providers [7]. Agent settings now expose an LLM-switching toggle [8], and OpenHands hides the API key for its cloud provider [9]. MCP auto-approval changed: when the MCP toggle is on, all MCP tool calls are auto-approved, with the per-tool checkboxes hidden behind a flag [10][11]. This simplifies the UX but reduces granular control for users who want selective approval.

Beyond Cline, LangChain shipped a new MCP adapter and refreshed model profile data [12][13]. LlamaIndex purged unfixable packages, a cleanup that may require users to update their dependency pins [ref:]. The ecosystem settled into maintenance mode, with no new major architectural shifts this week.