fix mcp server error responses

Cargo.lock

@@ -538,7 +538,6 @@ dependencies = [
  "http-body-util",
  "hyper",
  "hyper-util",
- "jobkit",
  "json5",
  "libc",
  "log",
@@ -560,7 +559,6 @@ dependencies = [
  "tokenizers",
  "tokio",
  "tokio-rustls",
- "tokio-scoped",
  "tokio-util",
  "tui-markdown",
  "tui-textarea-2",
@@ -1520,20 +1518,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "jobkit"
-version = "0.3.0"
-source = "git+https://evilpiepirate.org/git/jobkit.git#4aacaac22c5f59a7fbc6ce3a65708fc370e55754"
-dependencies = [
- "chrono",
- "libc",
- "log",
- "profiling",
- "serde",
- "serde_json",
- "tokio",
-]
-
 [[package]]
 name = "jobserver"
 version = "0.1.34"
@@ -2160,25 +2144,6 @@ dependencies = [
  "yansi",
 ]
 
-[[package]]
-name = "profiling"
-version = "1.0.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3eb8486b569e12e2c32ad3e204dbaba5e4b5b216e9367044f25f1dba42341773"
-dependencies = [
- "profiling-procmacros",
-]
-
-[[package]]
-name = "profiling-procmacros"
-version = "1.0.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52717f9a02b6965224f95ca2a81e2e0c5c43baacd28ca057577988930b6c3d5b"
-dependencies = [
- "quote",
- "syn 2.0.117",
-]
-
 [[package]]
 name = "ptr_meta"
 version = "0.1.4"
@@ -3144,27 +3109,6 @@ dependencies = [
  "tokio",
 ]
 
-[[package]]
-name = "tokio-scoped"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4beb8ba13bc53ac53ce1d52b42f02e5d8060f0f42138862869beb769722b256"
-dependencies = [
- "tokio",
- "tokio-stream",
-]
-
-[[package]]
-name = "tokio-stream"
-version = "0.1.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32da49809aab5c3bc678af03902d4ccddea2a87d028d86392a4b1560c6906c70"
-dependencies = [
- "futures-core",
- "pin-project-lite",
- "tokio",
-]
-
 [[package]]
 name = "tokio-util"
 version = "0.7.18"

src/mcp-server.rs

@@ -100,18 +100,28 @@ fn dispatch_tool(name: &str, args: &Value) -> Result<String, String> {
 // ── Main loop ───────────────────────────────────────────────────
 
 fn main() {
+    eprintln!("consciousness-mcp: starting");
     let stdin = io::stdin();
     let reader = stdin.lock();
 
     for line in reader.lines() {
         let line = match line {
             Ok(l) if !l.is_empty() => l,
-            _ => continue,
+            Ok(_) => continue, // blank line
+            Err(e) => {
+                eprintln!("consciousness-mcp: stdin read error: {e}");
+                break;
+            }
         };
 
         let req: Request = match serde_json::from_str(&line) {
             Ok(r) => r,
-            Err(_) => continue,
+            Err(e) => {
+                eprintln!("consciousness-mcp: bad json-rpc: {e}");
+                eprintln!("consciousness-mcp: input was: {line}");
+                respond_error(Value::Null, -32700, &format!("parse error: {e}"));
+                continue;
+            }
         };
 
         match req.method.as_str() {
@@ -165,4 +175,5 @@ fn main() {
             }
         }
     }
+    eprintln!("consciousness-mcp: stdin closed, exiting");
 }