fix(plugin): history budget now factors in execute_threshold_percentage

The compressor budget formula was context_limit × history_budget_percentage
but the agreed design was context_limit × execute_threshold × history_budget_percentage.

With execute_threshold=40% and history_budget=15%, the budget was 150k
instead of the correct 60k. Fixed in both transform.ts and execute-status.ts.

Author: ualtinok

packages/plugin/src/hooks/magic-context/execute-status.ts

@@ -143,7 +143,11 @@ export function executeStatus(
 
         const budgetTokens =
             historyBudgetPercentage && contextLimit > 0
-                ? Math.floor(contextLimit * historyBudgetPercentage)
+                ? Math.floor(
+                      contextLimit *
+                          (Math.min(executeThresholdPercentage, 80) / 100) *
+                          historyBudgetPercentage,
+                  )
                 : null;
         const budgetUsage = budgetTokens
             ? ((historyBlockTokens / budgetTokens) * 100).toFixed(0)

packages/plugin/src/hooks/magic-context/hook.ts

@@ -185,6 +185,7 @@ export function createMagicContextHook(deps: MagicContextDeps) {
         compartmentTokenBudget:
             deps.config.compartment_token_budget ?? DEFAULT_COMPARTMENT_TOKEN_BUDGET,
         historyBudgetPercentage: deps.config.history_budget_percentage,
+        executeThresholdPercentage: deps.config.execute_threshold_percentage,
         historianTimeoutMs: deps.config.historian_timeout_ms ?? DEFAULT_HISTORIAN_TIMEOUT_MS,
         getNotificationParams: (sessionId) =>
             getLiveNotificationParams(sessionId, liveModelBySession, variantBySession),

packages/plugin/src/hooks/magic-context/transform.ts

@@ -68,6 +68,7 @@ export interface TransformDeps {
     };
     compartmentTokenBudget?: number;
     historyBudgetPercentage?: number;
+    executeThresholdPercentage?: number | { default: number; [modelKey: string]: number };
     historianTimeoutMs?: number;
     getNotificationParams?: (
         sessionId: string,
@@ -264,6 +265,13 @@ export function createTransform(deps: TransformDeps) {
                 deps.historyBudgetPercentage && contextUsage.percentage > 0
                     ? Math.floor(
                           (contextUsage.inputTokens / (contextUsage.percentage / 100)) *
+                              (Math.min(
+                                  typeof deps.executeThresholdPercentage === "number"
+                                      ? deps.executeThresholdPercentage
+                                      : (deps.executeThresholdPercentage?.default ?? 80),
+                                  80,
+                              ) /
+                                  100) *
                               deps.historyBudgetPercentage,
                       )
                     : undefined,