fix(windows): avoid spawn ENAMETOOLONG via prompt tail truncation#14
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fix(windows): avoid spawn ENAMETOOLONG via prompt tail truncation#14
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Separates fixed CLI flags from the final prompt string so Windows can measure and truncate the prompt argument independently. Made-with: Cursor
Introduce win-cmdline-limit with pessimistic length estimation (libuv-style doubling for quoted argv) and tail-preserving prompt truncation when over budget. Load CURSOR_BRIDGE_WIN_CMDLINE_MAX (clamped 4096–32700, default 30000) into LoadedEnv and BridgeConfig. Made-with: Cursor
Run fitPromptToWinCmdline in chat and Anthropic handlers; return 500 with a clear error when the line cannot fit. Pass optional headers for JSON and SSE responses (X-Cursor-Proxy-Prompt-Truncated). Log startup cmdline budget. Made-with: Cursor
Add vitest for estimateCmdlineLength and fitPromptToWinCmdline; assert winCmdlineMax defaults and CURSOR_BRIDGE_WIN_CMDLINE_MAX clamping; extend BridgeConfig test fixture with winCmdlineMax. Made-with: Cursor
Clarify CURSOR_AGENT_NODE/SCRIPT vs ~32K cap; describe CURSOR_BRIDGE_WIN_CMDLINE_MAX and proxy behavior. Bump version to 0.6.0. Made-with: Cursor
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closes #13 |
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Summary
Windows
CreateProcesscaps the full command line at ~32,767 characters. Passing a huge chat prompt as the final argv could still fail withspawn ENAMETOOLONGeven when usingCURSOR_AGENT_NODE+CURSOR_AGENT_SCRIPT(those only avoid cmd.exe’s ~8K limit).Changes
buildAgentFixedArgsso fixed flags are separate from the prompt.CURSOR_BRIDGE_WIN_CMDLINE_MAX(default 30000, clamped 4096–32700).X-Cursor-Proxy-Prompt-Truncated: truewhen truncated;console.warnwith lengths.Commits
Made with Cursor