Replace llm CLI with Engine.chat in Jr.hs

Perfect! All tests pass. Let me create a summary of the changes made:

I've successfully replaced the `llm` CLI calls with `Engine.chat`
in Jr.

1. **`addCompletionSummary` function (lines 604-624)**:
   - Removed `Process.readProcessWithExitCode "llm" []` call - Added
   OPENROUTER_API_KEY environment variable check - Replaced with
   `Engine.chat` using the same pattern as `generateEpic - Proper
   error handling for missing API key and API failures

2. **`extractFacts` function (lines 658-680)**:
   - Removed `Process.readProcessWithExitCode "llm" ["-s", ...]` call
   - Added OPENROUTER_API_KEY environment variable check - Replaced
   with `Engine.chat` using the same pattern as `generateEpic -
   Proper error handling for missing API key and API failures

3. **Dependency cleanup**:
   - Removed `-- : run llm` from the header (line 12) since we
   no longer

- Both functions now use the OpenRouter API via `Engine.chat` -
Graceful degradation when OPENROUTER_API_KEY is not set (warning
messa - Consistent error handling pattern matching the existing
`generateEpicS - All tests pass successfully - No hlint or ormolu
issues

The implementation follows the exact pattern shown in the task
descripti

Task-Id: t-198

1 files changed, 36 insertions, 17 deletions

diff --git a/Omni/Jr.hs b/Omni/Jr.hs
index d875b07..a5bc48b 100755
--- a/Omni/Jr.hs
+++ b/Omni/Jr.hs
@@ -9,7 +9,6 @@
 -- : dep servant-server
 -- : dep lucid
 -- : dep servant-lucid
--- : run llm
 module Omni.Jr where
 
 import Alpha
@@ -604,17 +603,25 @@ addCompletionSummary tid commitSha = do
     -- Build prompt for llm
     let prompt = buildCompletionPrompt tid commitMessage diffSummary files
 
-    -- Call llm CLI to generate summary
-    (llmCode, llmOut, llmErr) <- Process.readProcessWithExitCode "llm" [] (Text.unpack prompt)
-
-    case llmCode of
-      Exit.ExitSuccess -> do
-        let summary = Text.strip (Text.pack llmOut)
-        unless (Text.null summary) <| do
-          _ <- TaskCore.addComment tid ("## Completion Summary\n\n" <> summary)
-          putText "[review] Added completion summary comment"
-      Exit.ExitFailure _ -> do
-        putText ("[review] Failed to generate completion summary: " <> Text.pack llmErr)
+    -- Try to get API key
+    maybeApiKey <- Env.lookupEnv "OPENROUTER_API_KEY"
+    case maybeApiKey of
+      Nothing -> do
+        putText "[review] Warning: OPENROUTER_API_KEY not set, skipping completion summary"
+      Just apiKey -> do
+        -- Call LLM via Engine.chat
+        let llm = Engine.defaultLLM {Engine.llmApiKey = Text.pack apiKey}
+            messages = [Engine.Message Engine.User prompt Nothing Nothing]
+
+        result <- Engine.chat llm [] messages
+        case result of
+          Left err -> do
+            putText ("[review] Failed to generate completion summary: " <> err)
+          Right msg -> do
+            let summary = Text.strip (Engine.msgContent msg)
+            unless (Text.null summary) <| do
+              _ <- TaskCore.addComment tid ("## Completion Summary\n\n" <> summary)
+              putText "[review] Added completion summary comment"
 
 -- | Build prompt for LLM to generate completion summary
 buildCompletionPrompt :: Text -> Text -> Text -> [String] -> Text
@@ -654,11 +661,23 @@ extractFacts tid commitSha = do
     Nothing -> pure ()
     Just task -> do
       let prompt = buildFactExtractionPrompt task diffOut
-      -- Call llm CLI
-      (code, llmOut, _) <- Process.readProcessWithExitCode "llm" ["-s", Text.unpack prompt] ""
-      case code of
-        Exit.ExitSuccess -> parseFacts tid llmOut
-        _ -> putText "[facts] Failed to extract facts"
+
+      -- Try to get API key
+      maybeApiKey <- Env.lookupEnv "OPENROUTER_API_KEY"
+      case maybeApiKey of
+        Nothing -> do
+          putText "[facts] Warning: OPENROUTER_API_KEY not set, skipping fact extraction"
+        Just apiKey -> do
+          -- Call LLM via Engine.chat
+          let llm = Engine.defaultLLM {Engine.llmApiKey = Text.pack apiKey}
+              messages = [Engine.Message Engine.User prompt Nothing Nothing]
+
+          result <- Engine.chat llm [] messages
+          case result of
+            Left err -> do
+              putText ("[facts] Failed to extract facts: " <> err)
+            Right msg -> do
+              parseFacts tid (Text.unpack (Engine.msgContent msg))
 
 -- | Build prompt for LLM to extract facts from completed task
 buildFactExtractionPrompt :: TaskCore.Task -> String -> Text