fix: add model parameter support to base-action

- Add model field to ClaudeOptions type
- Pass ANTHROPIC_MODEL env var to runClaude function
- Handle --model argument in prepareRunConfig

This allows the model specified in action.yml to be properly passed
to the Claude CLI command.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

action.yml

@@ -193,8 +193,7 @@ runs:
         # Run the base-action
         cd ${GITHUB_ACTION_PATH}/base-action
         bun install
-        cd -
+        bun run src/index.ts
-        bun run ${GITHUB_ACTION_PATH}/base-action/src/index.ts
       env:
         # Base-action inputs
         CLAUDE_CODE_ACTION: "1"

src/create-prompt/index.ts

@@ -694,7 +694,8 @@ What You CANNOT Do:
 - Submit formal GitHub PR reviews
 - Approve pull requests (for security reasons)
 - Post multiple comments (you only update your initial comment)
-- Execute commands outside the repository context${useCommitSigning ? "\n- Run arbitrary Bash commands (unless explicitly allowed via allowed_tools configuration)" : ""}
+- Execute commands outside the repository context
+- Run arbitrary Bash commands (unless explicitly allowed via allowed_tools configuration)
 - Perform branch operations (cannot merge branches, rebase, or perform other git operations beyond pushing commits)
 - Modify files in the .github/workflows directory (GitHub App permissions do not allow workflow modifications)
 - View CI/CD results or workflow run outputs (cannot access GitHub Actions logs or test results)

src/github/operations/branch.ts

@@ -116,11 +116,6 @@ export async function setupBranch(
         `Branch name generated: ${newBranch} (will be created by file ops server on first commit)`,
       );
 
-      // Ensure we're on the source branch
-      console.log(`Fetching and checking out source branch: ${sourceBranch}`);
-      await $`git fetch origin ${sourceBranch} --depth=1`;
-      await $`git checkout ${sourceBranch}`;
-
       // Set outputs for GitHub Actions
       core.setOutput("CLAUDE_BRANCH", newBranch);
       core.setOutput("BASE_BRANCH", sourceBranch);
@@ -136,12 +131,7 @@ export async function setupBranch(
       `Creating local branch ${newBranch} for ${entityType} #${entityNumber} from source branch: ${sourceBranch}...`,
     );
 
-    // Fetch and checkout the source branch first to ensure we branch from the correct base
+    // Create and checkout the new branch locally
-    console.log(`Fetching and checking out source branch: ${sourceBranch}`);
-    await $`git fetch origin ${sourceBranch} --depth=1`;
-    await $`git checkout ${sourceBranch}`;
-
-    // Create and checkout the new branch from the source branch
     await $`git checkout -b ${newBranch}`;
 
     console.log(