HLS Status Check

Perform a comprehensive health check of the Haskell Language Server (HLS) installation.

Checks to Perform

Run these checks in order, reporting results for each:

1. PATH Check

Check if haskell-language-server-wrapper is available in PATH:

which haskell-language-server-wrapper || where haskell-language-server-wrapper

If not found, report common installation locations:

• ~/.ghcup/bin (GHCup - recommended)
• ~/.local/bin
• ~/.cabal/bin

2. Version Check

If found, get version information:

haskell-language-server-wrapper --version

Report the HLS version and supported GHC versions.

3. Startup Test

Verify HLS can initialize by checking it responds to a simple request. Run:

echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"capabilities":{}}}' | timeout 10 haskell-language-server-wrapper --lsp 2>/dev/null | head -1

A valid JSON response indicates HLS can start successfully.

Output Format

Report results clearly:

HLS Status Check
================

1. PATH:    [PASS/FAIL] - location or "not found"
2. Version: [PASS/FAIL] - version string or error
3. Startup: [PASS/FAIL] - "responds to LSP" or error

Overall: [HEALTHY/ISSUES DETECTED]

If any check fails, suggest running the troubleshooting skill or checking the HLS documentation.