✨ Add --model flag for per-operation LLM model override

Introduce a new --model CLI option in CommonParams that allows
overriding the configured model for individual operations without
changing the global config.

Also update the GitHub Action and CI/CD workflows to explicitly pass
the model parameter, using claude-opus-4-5-20251101 for release note and
changelog generation.

Author: hyperb1iss

.github/workflows/cicd.yml

@@ -377,6 +377,7 @@ jobs:
           to: ${{ github.ref_name }}
           version-name: ${{ github.ref_name }}
           provider: anthropic
+          model: claude-opus-4-5-20251101
           api-key: ${{ secrets.ANTHROPIC_API_KEY }}
           output-file: CHANGELOG_SECTION.md
           binary-path: ./artifacts/git-iris-linux-amd64/git-iris
@@ -390,6 +391,7 @@ jobs:
           from: ${{ steps.prev_tag.outputs.tag }}
           to: ${{ github.ref_name }}
           provider: anthropic
+          model: claude-opus-4-5-20251101
           api-key: ${{ secrets.ANTHROPIC_API_KEY }}
           output-file: RELEASE_NOTES.md
           binary-path: ./artifacts/git-iris-linux-amd64/git-iris

.github/workflows/release.yml

@@ -120,6 +120,7 @@ jobs:
           output-file: CHANGELOG.md
           update-file: "true"
           provider: anthropic
+          model: claude-opus-4-5-20251101
           api-key: ${{ secrets.ANTHROPIC_API_KEY }}
           binary-path: ./target/release/git-iris
 
@@ -133,6 +134,7 @@ jobs:
           to: HEAD
           version-name: ${{ steps.version.outputs.version }}
           provider: anthropic
+          model: claude-opus-4-5-20251101
           api-key: ${{ secrets.ANTHROPIC_API_KEY }}
           binary-path: ./target/release/git-iris
 

action.yml

@@ -171,14 +171,23 @@ runs:
         GIT_IRIS="${GIT_IRIS_BIN:-git-iris}"
         COMMAND="${{ inputs.command }}"
 
+        echo "Provider: $IRIS_PROVIDER"
+        echo "Model: $IRIS_MODEL"
+
         # Build base command (--raw ensures markdown output, --quiet suppresses spinners)
-        CMD="$GIT_IRIS $COMMAND --from '${{ inputs.from }}' --to '${{ inputs.to }}' --raw --quiet"
+        # Explicitly pass --provider to ensure it's used regardless of config
+        CMD="$GIT_IRIS $COMMAND --from '${{ inputs.from }}' --to '${{ inputs.to }}' --provider '${{ inputs.provider }}' --raw --quiet"
 
         # Add version name if specified
         if [ -n "${{ inputs.version-name }}" ]; then
           CMD="$CMD --version-name '${{ inputs.version-name }}'"
         fi
 
+        # Add model if specified
+        if [ -n "${{ inputs.model }}" ]; then
+          CMD="$CMD --model '${{ inputs.model }}'"
+        fi
+
         # Execute and capture output
         CONTENT=$(eval $CMD)
 

src/common.rs

@@ -10,6 +10,10 @@ pub struct CommonParams {
     #[arg(long, help = "Override default LLM provider", value_parser = available_providers_parser)]
     pub provider: Option<String>,
 
+    /// Override model for this operation
+    #[arg(long, help = "Override model for this operation")]
+    pub model: Option<String>,
+
     /// Custom instructions for this operation
     #[arg(short, long, help = "Custom instructions for this operation")]
     pub instructions: Option<String>,
@@ -84,6 +88,15 @@ impl CommonParams {
             }
         }
 
+        // Apply model override if specified
+        if let Some(model) = &self.model {
+            let provider_name = config.default_provider.clone();
+            if let Some(provider_config) = config.providers.get_mut(&provider_name) {
+                provider_config.model = model.clone();
+                changes_made = true;
+            }
+        }
+
         if let Some(instructions) = &self.instructions {
             config.set_temp_instructions(Some(instructions.clone()));
         }