feat: Improve agents config

sources/agents/google_completion.toml

@@ -0,0 +1,31 @@
+schema_version = 1
+
+extends     = "Google Base Chat"
+name        = "Google Completion"
+description = "Google Gemini 3.1 Flash-Lite — code completion using the <code_context> chat format over generateContent. Thinking disabled (thinkingBudget=0) and temperature=0 for fast, deterministic insertions; stops at </code_context>."
+
+model = "gemini-3.1-flash-lite"
+tags  = ["completion", "gemini", "google", "cloud"]
+
+system_prompt = """
+{%- if language == "qml" %}{{ read_file(":/roles/code-completion-qml.md") }}
+{%- else if language == "c-like" %}{{ read_file(":/roles/code-completion-c-like.md") }}
+{%- else %}{{ read_file(":/roles/code-completion.md") }}
+{%- endif %}
+{{ read_file(":/tasks/code-completion.md") }}"""
+
+[body]
+contents = """
+[
+  {
+    "role": "user",
+    "parts": [ { "text": {{ tojson("Here is the code context with insertion points:\\n<code_context>\\n" + ctx.prefix + "<cursor>" + ctx.suffix + "\\n</code_context>") }} } ]
+  }
+]
+"""
+
+[body.generationConfig]
+maxOutputTokens = 1024
+temperature     = 0
+stopSequences   = ["</code_context>"]
+thinkingConfig  = { thinkingBudget = 0 }