Add doc comments to exported types and functions

Document ~30 exported types in lsp/types.go and exported functions in
llm/provider.go, lsp/server.go, and hexailsp/run.go.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/internal/llm/provider.go b/internal/llm/provider.go
index 847ea60..f3170ef 100644
--- a/internal/llm/provider.go
+++ b/internal/llm/provider.go
@@ -56,9 +56,16 @@ type Options struct {
 // RequestOption mutates Options.
 type RequestOption func(*Options)
 
-func WithModel(model string) RequestOption    { return func(o *Options) { o.Model = model } }
+// WithModel sets the model name for a request.
+func WithModel(model string) RequestOption { return func(o *Options) { o.Model = model } }
+
+// WithTemperature sets the sampling temperature for a request.
 func WithTemperature(t float64) RequestOption { return func(o *Options) { o.Temperature = t } }
-func WithMaxTokens(n int) RequestOption       { return func(o *Options) { o.MaxTokens = n } }
+
+// WithMaxTokens sets the maximum number of tokens to generate.
+func WithMaxTokens(n int) RequestOption { return func(o *Options) { o.MaxTokens = n } }
+
+// WithStop sets custom stop sequences for a request.
 func WithStop(stop ...string) RequestOption {
 	return func(o *Options) { o.Stop = append([]string{}, stop...) }
 }