Support config-based default questions for agents (foundational and custom)

Everyone can contribute. Help move this issue forward while earning points, leveling up and collecting rewards.

• Close this issue

Support config-based default questions for agents (foundational and custom)

Problem

Currently, Gitlab::Duo::Chat::DefaultQuestions provides questions based on:

• Resource context (issue, merge request, commit, etc.)
• URL context (code pages get CODE questions, others get DEFAULT)

However, with the introduction of agent-specific flows and the expectation of 20+ foundational agents in the coming months, we need a configuration-based approach for agent-specific default questions rather than hardcoding them in the Rails codebase.

Current limitations:

• Hardcoding questions in DefaultQuestions class doesn't scale to 20+ agents
• Custom agents (stored in AI Catalog) have no way to define their own default questions
• Foundational agents (defined in FoundationalChatAgentsDefinitions) have no place for default questions
• No unified approach for both foundational and custom agents

Below are example default questions/prompts for each agent type that should be configurable:

1. GitLab Duo (General Chat Agent)

default_questions: [
  "What does this code do?",
  "How can I make this code more efficient?",
  "Identify any security vulnerabilities in my code",
  "Are there any bugs in this code?",
  "Create documentation for this code"
]

2. Security Analyst Agent

default_questions: [
  "What vulnerabilities are in my project?",
  "Analyze the severity of these vulnerabilities",
  "Help me triage these security findings",
  "Create an issue for this vulnerability"
]

3. Analytics Agent

default_questions: [
  "How many merge requests were merged this month?",
  "What is the average time to merge?",
  "Show me pipeline success rates",
  "Analyze project activity trends"
]

4. Code Review Agent

default_questions: [
  "Review this merge request for code quality",
  "Check for potential bugs in this code",
  "Suggest improvements for this implementation",
  "Verify this code follows best practices"
]

5. Pipeline Fix Agent

default_questions: [
  "Why is my pipeline failing?",
  "Fix the failing job in my pipeline",
  "Optimize my CI/CD configuration",
  "Debug this pipeline error"
]

6. Issue to MR Agent

default_questions: [
  "Create a merge request for this issue",
  "Implement the requirements from this issue",
  "Generate code to address this issue",
  "Plan the implementation for this issue"
]

7. Software Development Agent

default_questions: [
  "Help me implement this feature",
  "Refactor this code for better maintainability",
  "Add tests for this functionality",
  "Optimize this code for performance"
]

8. Planner Agent (Foundational)

default_questions: [
  "What are the key priorities for this project?",
  "Help me organize this epic into smaller issues",
  "What dependencies exist between these work items?",
  "Summarize the progress on this milestone"
]