Fix jr loop: update model IDs and dev shellHEADlive

- Update OpenRouter model IDs to Claude 4.5 family:
  - anthropic/claude-sonnet-4.5 (default) - anthropic/claude-haiku-4.5
  (simple tasks) - anthropic/claude-opus-4.5 (complex tasks)
- Remove aider-chat from dev shell (broken, unused) - Simplify
llm package (remove llm-ollama plugin) - Update nixos-unstable for
llm 0.27.1

Task-Id: t-163

4 files changed, 14 insertions, 18 deletions

diff --git a/Omni/Agent/Engine.hs b/Omni/Agent/Engine.hs
index 2704606..e019341 100644
--- a/Omni/Agent/Engine.hs
+++ b/Omni/Agent/Engine.hs
@@ -77,7 +77,7 @@ test =
         llmBaseUrl defaultLLM Test.@=? "https://openrouter.ai/api/v1",
       Test.unit "defaultLLM has OpenRouter headers" <| do
         length (llmExtraHeaders defaultLLM) Test.@=? 2
-        llmModel defaultLLM Test.@=? "anthropic/claude-sonnet-4-20250514",
+        llmModel defaultLLM Test.@=? "anthropic/claude-sonnet-4.5",
       Test.unit "defaultAgentConfig has sensible defaults" <| do
         agentMaxIterations defaultAgentConfig Test.@=? 10,
       Test.unit "defaultEngineConfig has no-op callbacks" <| do
@@ -227,7 +227,7 @@ defaultLLM =
   LLM
     { llmBaseUrl = "https://openrouter.ai/api/v1",
       llmApiKey = "",
-      llmModel = "anthropic/claude-sonnet-4-20250514",
+      llmModel = "anthropic/claude-sonnet-4.5",
       llmExtraHeaders =
         [ ("HTTP-Referer", "https://omni.dev"),
           ("X-Title", "Omni Agent")
diff --git a/Omni/Agent/Worker.hs b/Omni/Agent/Worker.hs
index ded4144..61c392b 100644
--- a/Omni/Agent/Worker.hs
+++ b/Omni/Agent/Worker.hs
@@ -343,13 +343,13 @@ selectModel task = selectModelByComplexity (TaskCore.taskComplexity task)
 
 -- | Select model based on complexity level
 selectModelByComplexity :: Maybe Int -> Text
-selectModelByComplexity Nothing = "anthropic/claude-sonnet-4-20250514"
-selectModelByComplexity (Just 1) = "anthropic/claude-haiku"
-selectModelByComplexity (Just 2) = "anthropic/claude-haiku"
-selectModelByComplexity (Just 3) = "anthropic/claude-sonnet-4-20250514"
-selectModelByComplexity (Just 4) = "anthropic/claude-sonnet-4-20250514"
-selectModelByComplexity (Just 5) = "anthropic/claude-opus-4-20250514"
-selectModelByComplexity (Just _) = "anthropic/claude-sonnet-4-20250514"
+selectModelByComplexity Nothing = "anthropic/claude-sonnet-4.5"
+selectModelByComplexity (Just 1) = "anthropic/claude-haiku-4.5"
+selectModelByComplexity (Just 2) = "anthropic/claude-haiku-4.5"
+selectModelByComplexity (Just 3) = "anthropic/claude-sonnet-4.5"
+selectModelByComplexity (Just 4) = "anthropic/claude-sonnet-4.5"
+selectModelByComplexity (Just 5) = "anthropic/claude-opus-4.5"
+selectModelByComplexity (Just _) = "anthropic/claude-sonnet-4.5"
 
 formatTask :: TaskCore.Task -> Text
 formatTask t =
diff --git a/Omni/Bild.nix b/Omni/Bild.nix
index 51cb2e2..b7e0801 100644
--- a/Omni/Bild.nix
+++ b/Omni/Bild.nix
@@ -143,11 +143,8 @@
         tree
         wemux
         ;
-      aider-chat = unstable.aider-chat;
       llama-cpp = unstable.llama-cpp;
-      llm =
-        unstable.python312.withPackages
-        (p: [p.llm p.llm-ollama p.llm-sentence-transformers]);
+      llm = unstable.python312.withPackages (p: [p.llm]);
       ollama = unstable.ollama;
       ruff = unstable.ruff;
       shellcheck = unstable.shellcheck;
@@ -255,7 +252,6 @@
       name = "omnidev";
       # this should just be dev tools
       buildInputs = with self.pkgs; [
-        aider-chat
         bat
         bc
         self.bild
diff --git a/Omni/Bild/Sources.json b/Omni/Bild/Sources.json
index 4e1e9d6..a7d057a 100644
--- a/Omni/Bild/Sources.json
+++ b/Omni/Bild/Sources.json
@@ -187,10 +187,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6f16a3566ed9024338f82e8c98f07303c17479ab",
-        "sha256": "1z75blbml59sal35w1hvfk3ig2s86n4zidxjpcida0md7rrcinh2",
+        "rev": "2fad6eac6077f03fe109c4d4eb171cf96791faa4",
+        "sha256": "14inw2gxia29f0qh9kyvdq9y1wcv43r4cc7fylz9v372z5chiamh",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/6f16a3566ed9024338f82e8c98f07303c17479ab.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/2fad6eac6077f03fe109c4d4eb171cf96791faa4.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nvidia-patch-nixos": {
@@ -211,7 +211,7 @@
         "homepage": "https://ollama.com",
         "owner": "ollama",
         "repo": "ollama-python",
-        "rev": "ee349ecc6d05ea57c9e91bc9345e2db3bc79bb5b",
+        "rev": "115792583ed248411d68334050ffed03ce9bc065",
         "sha256": "1dkrdkw7gkr9ilfb34qh9vwm0231csg7raln69p00p4mvx2w53gi",
         "type": "tarball",
         "url": "https://github.com/ollama/ollama-python/archive/refs/tags/v0.4.5.tar.gz",