[Feature Request] Add verification mode for generated code with increased token usage

Bug Description
I notice a lot more claim without verifcation, which make me cannot trust what it is doing. I rather span more token and get correct result and accept the faster token drain

Environment Info

• Platform: linux
• Terminal: kitty
• Version: 2.1.104
• Feedback ID: 0efabb02-1523-4667-aa86-d447e7d75f08

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/kelvin/.local/share/claude/versions/2.1.104 (expected in multi-process scenarios)\n    at KQ$ (/$bunfs/root/src/entrypoints/cli.js:2838:2153)\n    at ye8 (/$bunfs/root/src/entrypoints/cli.js:2838:1233)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:44.774Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at dDH (/$bunfs/root/src/entrypoints/cli.js:1558:33935)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:44.792Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at dDH (/$bunfs/root/src/entrypoints/cli.js:1558:33935)\n    at async W (/$bunfs/root/src/entrypoints/cli.js:6005:10596)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:45.461Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at dDH (/$bunfs/root/src/entrypoints/cli.js:1558:33935)\n    at async v (/$bunfs/root/src/entrypoints/cli.js:6005:11366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:45.461Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at dDH (/$bunfs/root/src/entrypoints/cli.js:1558:33935)\n    at async W (/$bunfs/root/src/entrypoints/cli.js:6005:10596)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:45.503Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at dDH (/$bunfs/root/src/entrypoints/cli.js:1558:33935)\n    at async v (/$bunfs/root/src/entrypoints/cli.js:6005:11366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T11:57:45.503Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: \"pyright-langserver\"\n    at start (/$bunfs/root/src/entrypoints/cli.js:1636:22340)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T12:15:24.719Z"},{"error":"Error: Executable not found in $PATH: \"pyright-langserver\"\n    at spawn (unknown)\n    at spawn (node:child_process:667:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/src/entrypoints/cli.js:1636:20876)\n    at Y (/$bunfs/root/src/entrypoints/cli.js:1636:24859)\n    at f (/$bunfs/root/src/entrypoints/cli.js:1636:29931)\n    at Y (/$bunfs/root/src/entrypoints/cli.js:1636:30268)\n    at D (/$bunfs/root/src/entrypoints/cli.js:1636:30814)\n    at call (/$bunfs/root/src/entrypoints/cli.js:2220:1377)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T12:15:24.720Z"},{"error":"Error: Failed to start LSP server for file /home/kelvin/thesis/data/clumap-recreate/dfg_4d_split.py: Executable not found in $PATH: \"pyright-langserver\"\n    at f (/$bunfs/root/src/entrypoints/cli.js:1636:29957)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T12:15:24.720Z"},{"error":"Error: Executable not found in $PATH: \"pyright-langserver\"\n    at spawn (unknown)\n    at spawn (node:child_process:667:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/src/entrypoints/cli.js:1636:20876)\n    at Y (/$bunfs/root/src/entrypoints/cli.js:1636:24859)\n    at f (/$bunfs/root/src/entrypoints/cli.js:1636:29931)\n    at Y (/$bunfs/root/src/entrypoints/cli.js:1636:30268)\n    at D (/$bunfs/root/src/entrypoints/cli.js:1636:30814)\n    at call (/$bunfs/root/src/entrypoints/cli.js:2220:1377)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T12:15:24.720Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: \"pyright-langserver\"\n    at start (/$bunfs/root/src/entrypoints/cli.js:1636:22340)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T12:15:38.823Z"},{"error":"Error: Executable not found in $PATH: \"pyright-langserver\"\n    at spawn (unknown)\n    at spawn (node:child_process:667:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/src/entrypoints/cli.js:1636:20876)\…

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