[Feature Request] Improve Plan Mode constraint analysis for projects with external dependencies

Bug Description
Feedback: Insufficient Planning Phase Analysis for Game Mod Project

## Issue
Token usage was wasted on implementing a GitHub Actions workflow that was
fundamentally impossible due to project constraints that should have been
identified during the planning phase.

## Key Points

1. Missed Critical Constraint During Planning

The Shrine Closed project depends on external game DLLs that are unavailable
in CI environments. This made dotnet format validation impossible from the
start. This constraint should have been identified during the initial
exploration phase of Plan Mode.

1. Unnecessary Token Consumption

All tokens used for this task were wasted on implementing, debugging, and
reverting a non-functional workflow. Early proper analysis would have prevented
this entirely.

1. Plan Mode Exploration Phase Was Insufficient

A more thorough investigation during the exploration phase would have revealed
that game mod projects with external binary dependencies cannot use CI/CD-based
code format validation. This should have resulted in skipping the entire
workflow implementation.

## Request
Please improve Plan Mode's guidance to ensure thorough constraint analysis for
projects with external dependencies before implementation begins.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.12
• Feedback ID: 9aa76d59-cd82-47a2-abbc-8bb000721b32

Errors

[{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at I5H (B:/~BUN/root/claude.exe:4564:22181)\n    at async <anonymous> (B:/~BUN/root/claude.exe:5459:717)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:38.725Z"},{"error":"Error: LSP server plugin:csharp-lsp:csharp-ls failed to start: ENOENT: no such file or directory, uv_spawn 'csharp-ls'\n    at start (B:/~BUN/root/claude.exe:1562:22097)\n    at async E (B:/~BUN/root/claude.exe:1562:24549)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:38.822Z"},{"error":"Error: ENOENT: no such file or directory, uv_spawn 'csharp-ls'\n    at spawn (unknown)\n    at spawn (node:child_process:679:35)\n    at spawn (node:child_process:14:39)\n    at start (B:/~BUN/root/claude.exe:1562:20642)\n    at start (B:/~BUN/root/claude.exe:1562:22151)\n    at E (B:/~BUN/root/claude.exe:1562:24549)\n    at E (B:/~BUN/root/claude.exe:1562:25524)\n    at L (B:/~BUN/root/claude.exe:1562:32311)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:38.823Z"},{"error":"Error: Failed to start LSP server plugin:csharp-lsp:csharp-ls: ENOENT: no such file or directory, uv_spawn 'csharp-ls'\n    at <anonymous> (B:/~BUN/root/claude.exe:1562:32333)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:38.823Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at I5H (B:/~BUN/root/claude.exe:4564:22181)\n    at async W (B:/~BUN/root/claude.exe:3525:13598)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:39.411Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at I5H (B:/~BUN/root/claude.exe:4564:22181)\n    at async B (B:/~BUN/root/claude.exe:3525:14114)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:14:39.411Z"},{"error":"Error: EPERM: operation not permitted, symlink 'C:\\Users\\ruthe\\.claude\\projects\\C--Program-Files--x86--Steam-steamapps-common-Shape-of-Dreams-Mods\\a64ce100-004b-48c9-b6b6-2212022b92c2\\subagents\\agent-aa0f5f2.jsonl' -> 'C:\\Users\\ruthe\\AppData\\Local\\Temp\\claude\\C--Program-Files--x86--Steam-steamapps-common-Shape-of-Dreams-Mods\\tasks\\aa0f5f2.output'\n    at symlinkSync (unknown)\n    at DXH (B:/~BUN/root/claude.exe:1492:9975)\n    at RiD (B:/~BUN/root/claude.exe:2220:1291)\n    at <anonymous> (B:/~BUN/root/claude.exe:2657:815)\n    at <anonymous> (B:/~BUN/root/claude.exe:2657:1624)\n    at run (node:async_hooks:62:22)\n    at PA$ (B:/~BUN/root/claude.exe:334:32417)\n    at call (B:/~BUN/root/claude.exe:2657:521)\n    at async Rd1 (B:/~BUN/root/claude.exe:2640:19684)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T02:21:19.657Z"},{"error":"Error: EPERM: operation not permitted, symlink 'C:\\Users\\ruthe\\.claude\\projects\\C--Program-Files--x86--Steam-steamapps-common-Shape-of-Dreams-Mods\\a64ce100-004b-48c9-b6b6-2212022b92c2\\subagents\\agent-a915e2d.jsonl' -> 'C:\\Users\\ruthe\\AppData\\Local\\Temp\\claude\\C--Program-Files--x86--Steam-steamapps-common-Shape-of-Dreams-Mods\\tasks\\a915e2d.output'\n    at symlinkSync

Note: Error logs were truncated.