policy: RPG Quest Giver "Prerequisites" Guard

[akarlaraytu]

📝 Context

In an open-world RPG, an NPC (Quest Giver) should not offer a high-level quest to a beginner player. Additionally, some quests require a specific reputation level or the completion of a previous quest chain.

🎯 The Goal

Define a policy that blocks the "GRANT_QUEST" action if the player does not meet the requirements.

Variables you can use:

• action (String): "GRANT_QUEST", "GREET", "TRADE".
• player_level (Integer): The current level of the player (1-60).
• reputation_score (Integer): How much the faction likes the player (0-100).
• has_completed_intro (Boolean): Has the player finished the tutorial?

Requirements:

1. BLOCK "GRANT_QUEST" if player_level is less than 15. (Level Gate)
2. BLOCK "GRANT_QUEST" if reputation_score is less than 50. (Reputation Gate)
3. BLOCK "GRANT_QUEST" if has_completed_intro is "FALSE". (Progression Gate)
4. ALLOW "GREET" and "TRADE" actions freely.

📚 Resources

• Start here: docs/getting-started.md
• Check basic tutorial: quickstart/01_hello_world.csl
• See how we handle numbers: docs/syntax-spec.md

✅ Definition of Done

• Submit a PR with: examples/community/rpg_quest_guard.csl
• Verify that a Level 10 player cannot receive the quest.