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"body": "## Context\n\nRaised repeatedly in Slack DMs between Scott McMaster and others (June 4, 2026). Scott has been blocked on printf-debugging Rust code because the debugger doesn't work in the nix environment:\n\n> \"I really, REALLY wish the debugger could be made to work\"<br>\"rust-analyzer works at some level but not with codelldb as I recall\"<br>\"Everything is supposed to just work out of the box, and it does...except if you're using nix\"<br>\"I'd like a launch or attach config that doesn't hang in the nix env\"\n\nThe suggestion from the team is that Juan (arximboldi) may be best positioned to fix this since it's nix-environment related.\n\n## Problem\n\n`codelldb` (the VS Code LLDB debugger adapter) hangs or fails to connect when launched inside the nix dev shell. `rust-analyzer` works for type-checking and LSP, but breakpoint-based debugging via `codelldb` doesn't function. This forces devs to use print/log debugging on every Rust change, which is especially painful given Rust's slow compile times.\n\n## Impact\n\n* Every Rust bug investigation requires inserting print statements, waiting for a full Rust compile, and repeating\n* Development velocity on the Tauri backend (`apps/native/src-tauri`) is significantly slowed\n* Scott explicitly mentioned this blocks investigation of the background watcher issue (darkmatter/nixmac#280)\n\n## Acceptance Criteria / Gherkin Specs\n\n```gherkin\nScenario: Developer attaches codelldb debugger to running nixmac process\n Given I have nixmac running in development mode in the nix dev shell\n And I have a VS Code launch/attach config for codelldb\n When I click \\\"Attach to Process\\\" in VS Code\n Then codelldb connects to the nixmac process within 10 seconds\n And breakpoints set in Rust source files are hit when the code path is reached\n\nScenario: Developer launches nixmac under codelldb from VS Code\n Given I am in the nix dev shell\n And I have a VS Code launch config pointing at the nixmac binary\n When I press F5 (Start Debugging)\n Then nixmac launches under codelldb\n And breakpoints are hit during execution\n\nScenario: Debugger does not hang in nix dev shell\n Given the nix dev shell is active with all dependencies\n When codelldb attempts to start\n Then it does not hang or timeout\n And the debugger session is established within 15 seconds\n\nScenario: Documentation covers nix-specific debugger setup\n Given a new developer joins the team\n When they follow the README or devenv setup guide\n Then they can get codelldb working in VS Code without manual investigation\n```\n\n## Suggested Approach\n\n* Investigate whether `codelldb` needs to be pinned as a nix package in `devenv.nix` or `flake.nix`\n* Check if a custom VS Code launch config with explicit `codelldbPath` pointing to the nix store path resolves the hang\n* Consider adding a `.vscode/launch.json` template that works in the nix env\n* Juan (arximboldi) is likely best positioned to investigate given nix expertise\n\n*— This issue was created by Claude based on Slack discussion on June 4-5, 2026*",
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