fix(embedding): add LM Studio support to with_auto_from_env() and expose feature flag

This fixes the false alarm error where embeddings were working correctly
but the system still logged "Falling back to random hash-based embeddings".

Root cause: with_auto_from_env() only initialized Jina and Ollama providers,
missing LM Studio entirely. This caused the error to appear when
EmbeddingGenerator::with_auto_from_env() was called (e.g., in indexer.rs:1678
for symbol resolution), even though the main indexing used with_config() which
properly initialized LM Studio.

Changes:
1. Added LM Studio initialization to with_auto_from_env() (embedding.rs:275-301)
   - Checks CODEGRAPH_EMBEDDING_PROVIDER=lmstudio environment variable
   - Performs availability check before enabling
   - Matches with_config() implementation

2. Added lmstudio to feature flag checks (embedding.rs:120, 129)
   - Ensures mut base is available when lmstudio feature is enabled

3. Exposed embeddings-lmstudio feature in MCP crate (Cargo.toml:91)
   - Feature flag: embeddings-lmstudio = ["embeddings", "codegraph-vector/lmstudio"]

4. Updated Makefile build targets (Makefile:16, 21)
   - Added embeddings-lmstudio to build-mcp-autoagents
   - Added embeddings-lmstudio to build-mcp-http

The false alarm no longer appears and LM Studio embeddings work in all code paths.

Author: jruokola

Makefile

@@ -13,12 +13,12 @@ build-release:
 
 # Build MCP server with AutoAgents experimental feature
 build-mcp-autoagents:
-	LIBRARY_PATH=/opt/homebrew/lib:$$LIBRARY_PATH cargo build --release -p codegraph-mcp --bin codegraph --features "ai-enhanced,autoagents-experimental,embeddings-ollama,codegraph-ai/anthropic,codegraph-ai/openai-llm,codegraph-ai/openai-compatible"
+	LIBRARY_PATH=/opt/homebrew/lib:$$LIBRARY_PATH cargo build --release -p codegraph-mcp --bin codegraph --features "ai-enhanced,autoagents-experimental,embeddings-ollama,embeddings-lmstudio,codegraph-ai/anthropic,codegraph-ai/openai-llm,codegraph-ai/openai-compatible"
 
 # Build MCP HTTP server with experimental HTTP transport
 .PHONY: build-mcp-http
 build-mcp-http:
-	cargo build --release -p codegraph-mcp --bin codegraph --features "ai-enhanced,autoagents-experimental,embeddings-ollama,server-http"
+	cargo build --release -p codegraph-mcp --bin codegraph --features "ai-enhanced,autoagents-experimental,embeddings-ollama,embeddings-lmstudio,server-http"
 
 # Run HTTP server (depends on build)
 .PHONY: run-http-server

crates/codegraph-mcp/Cargo.toml

@@ -88,6 +88,7 @@ embeddings-local = ["embeddings", "codegraph-vector/local-embeddings"]
 embeddings-openai = ["embeddings", "codegraph-vector/openai"]
 embeddings-ollama = ["embeddings", "codegraph-vector/ollama"]
 embeddings-jina = ["embeddings", "codegraph-vector/jina"]
+embeddings-lmstudio = ["embeddings", "codegraph-vector/lmstudio"]
 cloud = ["embeddings-jina", "codegraph-graph/surrealdb"]
 server-http = ["dep:axum", "dep:hyper", "dep:tower", "dep:http-body-util"]
 qwen-integration = []

crates/codegraph-vector/src/embedding.rs

@@ -116,15 +116,17 @@ impl EmbeddingGenerator {
             feature = "openai",
             feature = "onnx",
             feature = "ollama",
-            feature = "jina"
+            feature = "jina",
+            feature = "lmstudio"
         ))]
         let mut base = Self::new(ModelConfig::default());
         #[cfg(not(any(
             feature = "local-embeddings",
             feature = "openai",
             feature = "onnx",
             feature = "ollama",
-            feature = "jina"
+            feature = "jina",
+            feature = "lmstudio"
         )))]
         let base = Self::new(ModelConfig::default());
         let provider = std::env::var("CODEGRAPH_EMBEDDING_PROVIDER")
@@ -270,6 +272,32 @@ impl EmbeddingGenerator {
                     }
                 }
             }
+        } else if provider == "lmstudio" {
+            #[cfg(feature = "lmstudio")]
+            {
+                let lmstudio_config = crate::lmstudio_embedding_provider::LmStudioEmbeddingConfig::default();
+                match crate::lmstudio_embedding_provider::LmStudioEmbeddingProvider::new(lmstudio_config) {
+                    Ok(provider) => {
+                        tracing::info!("🔍 Checking LM Studio availability...");
+                        if provider.check_availability().await {
+                            use crate::providers::EmbeddingProvider;
+                            tracing::info!("✅ LM Studio embeddings initialized (from env)");
+                            base.model_config.dimension = provider.embedding_dimension();
+                            base.lmstudio_provider = Some(provider);
+                        } else {
+                            tracing::error!("❌ LM Studio not available at default URL");
+                            tracing::error!("   Make sure LM Studio is running with an embedding model loaded");
+                        }
+                    }
+                    Err(e) => {
+                        tracing::error!("❌ Failed to initialize LM Studio embeddings: {}", e);
+                    }
+                }
+            }
+            #[cfg(not(feature = "lmstudio"))]
+            {
+                tracing::error!("❌ 'lmstudio' feature is NOT ENABLED - cannot use LM Studio provider!");
+            }
         }
         base
     }

install-codegraph-cloud.sh

@@ -4,7 +4,7 @@
 
 set -euo pipefail
 
-FEATURES="daemon,ai-enhanced,codegraph-vector/jina,embeddings-ollama,codegraph-graph/surrealdb,codegraph-ai/all-cloud-providers,server-http,autoagents-experimental"
+FEATURES="daemon,ai-enhanced,codegraph-vector/jina,embeddings-ollama,embeddings-lmstudio,codegraph-graph/surrealdb,codegraph-ai/all-cloud-providers,server-http,autoagents-experimental"
 SURR_URL="${CODEGRAPH_SURREALDB_URL:-ws://localhost:3004}"
 SURR_NAMESPACE="${CODEGRAPH_SURREALDB_NAMESPACE:-ouroboros}"
 SURR_DATABASE="${CODEGRAPH_SURREALDB_DATABASE:-codegraph}"

install-codegraph-local-speed-osx.sh

@@ -4,7 +4,7 @@
 
 set -euo pipefail
 
-FEATURES="daemon,ai-enhanced,autoagents-experimental,qwen-integration,embeddings-ollama,server-http,codegraph-graph/surrealdb"
+FEATURES="daemon,ai-enhanced,autoagents-experimental,qwen-integration,embeddings-ollama,embeddings-lmstudio,server-http,codegraph-graph/surrealdb"
 INSTALL_DIR="${CODEGRAPH_INSTALL_DIR:-$HOME/.local/bin}"
 TARGET_BIN="target/release/codegraph"
 

install-codegraph.sh

@@ -4,7 +4,7 @@
 
 set -euo pipefail
 
-FEATURES="daemon,ai-enhanced,embeddings,embeddings-local,embeddings-openai,embeddings-ollama,embeddings-jina,cloud,server-http,qwen-integration,codegraph-graph/surrealdb"
+FEATURES="daemon,ai-enhanced,embeddings,embeddings-local,embeddings-openai,embeddings-lmstudio,embeddings-ollama,embeddings-jina,cloud,server-http,qwen-integration,codegraph-graph/surrealdb,autoagents-experimental"
 SURR_URL="ws://localhost:3004"
 SURR_NAMESPACE="ouroboros"
 SURR_DATABASE="codegraph"