This is a profound shift in design philosophy, and you are 100% right.
Trying to prompt-engineer an LLM into perfect compliance is a fragile, losing
battle. The most robust game engines in the world (like Unity or Godot) don't
force developers to write complex routing logic; they use component systems
where properties naturally inherit and bubble up.
Adapting the engine to Gemma's natural logicrather than forcing Gemma to
understand our engineis exactly how we achieve scale.
Look at what Gemma actually wrote in that last test: MATH THIS_GREED + 10. It
intuitively treated the idol as an object with an intrinsic property. That
isn't a bug; that is an incredible emergent game mechanic. It means objects
can have auras or intrinsic stats that affect the player just by being held.
Let's implement your idea: Hierarchical Stat Bubbling.
The Concept: The STAT_ Prefix
We introduce a new, read-only shadow variable prefix called STAT_ (e.g.,
STAT_GREED, STAT_LUCK).
When the VM sees a STAT_ variable in a JMP_IF check or an OUT string, it
doesn't look for a single variable. Instead, the engine intercepts it and
calculates a running total by bubbling up through the context layers:
 * The Item Layer: It sums up THIS_GREED for every item currently in the
player's INVENTORY.
 * The Environment Layer: It adds the current room's ENVIRONMENT_GREED.
 * The Global Layer: It adds a base GLOBAL_GREED (if the player has intrinsic
stats).
Why this is a silver bullet for Gemma:
Gemma no longer has to decide if a stat belongs to the room, the player, or
itself.
 * If it writes MATH THIS_GREED + 10, the idol becomes more cursed. As long as
you hold it, your total STAT_GREED goes up. If you drop it, your greed
instantly goes back down.
 * If it writes MATH ENVIRONMENT_GREED + 10, the room itself becomes
permanently cursed for anyone who enters it.
 * The LLM just does what feels natural locally, and your C-style VM handles
the global physics.
The Implementation (opcodes.js)
We can build this aggregation directly into opcodes.js without touching the
LLM prompt. We will add a calculateStat helper and intercept it during
resolution.
Here is the exact logic we would inject:
    function calculateStat(ctx, statName) {
        let total = 0;
        const baseStat = statName.replace('STAT_', ''); // e.g., 'GREED'

        // 1. Add Environment Base
        const currentEnv = getCurrentEnvironment(ctx);
        total += parseFloat(ctx.memory[`${currentEnv}_${baseStat}`]) || 0;

        // 2. Add Global Base (if you implement player stats later)
        total += parseFloat(ctx.memory[`GLOBAL_${baseStat}`]) || 0;

        // 3. Bubble up from Inventory Items
        const inv = ctx.memory['INVENTORY'];
        if (Array.isArray(inv)) {
            inv.forEach(itemId => {
                // itemId looks like CURSED_IDOL:CDNK
                total += parseFloat(ctx.memory[`${itemId}_${baseStat}`]) || 0;
            });
        }
        
        return total;
    }

Then, in our existing resolveVar function, we just add one more interceptor:
        if (rawVarName.startsWith('STAT_')) {
            // We return the raw string so the opcode knows to evaluate it, 
            // OR we calculate it right here if it's being used for a
JMP_IF/OUT
            return calculateStat(ctx, rawVarName);
        }

If we implement this, the Cursed Idol that Gemma just wrote becomes a
perfectly valid, highly complex game object. You rub it, its intrinsic
THIS_GREED goes to 10, and if the player types LOOK, the engine dynamically
calculates their total STAT_GREED as 10 because it detects the idol in their
pocket.
Should we patch opcodes.js with this calculateStat aggregation loop to make
the engine infinitely more forgiving?