feat(web): parallel tasks + sidebar filter/sort/group, branch-switch safety, provider icons

internal/agent/budget.go

@@ -66,14 +66,31 @@ func (b *BudgetManager) Track(promptTokens, completionTokens int64) BudgetStatus
 
 	b.promptTokens += promptTokens
 	b.completionTokens += completionTokens
-
-	inputCost := float64(promptTokens) * b.pricing.InputPer1M / 1_000_000
-	outputCost := float64(completionTokens) * b.pricing.OutputPer1M / 1_000_000
-	b.totalCost += inputCost + outputCost
+	b.totalCost += b.costLocked(promptTokens, completionTokens, 0)
 
 	return b.statusLocked()
 }
 
+// costLocked computes the USD cost of the given token counts, charging the
+// cached (cache-read) subset of the prompt at the discounted CacheRead rate when
+// the registry has it (else at the full input rate). Caller must hold the lock.
+func (b *BudgetManager) costLocked(promptTokens, completionTokens, cachedTokens int64) float64 {
+	if cachedTokens < 0 {
+		cachedTokens = 0
+	}
+	if cachedTokens > promptTokens {
+		cachedTokens = promptTokens
+	}
+	cacheRate := b.pricing.CacheReadPer1M
+	if cacheRate <= 0 {
+		cacheRate = b.pricing.InputPer1M // no discount data: bill cached at full price
+	}
+	inputCost := float64(promptTokens-cachedTokens)*b.pricing.InputPer1M/1_000_000 +
+		float64(cachedTokens)*cacheRate/1_000_000
+	outputCost := float64(completionTokens) * b.pricing.OutputPer1M / 1_000_000
+	return inputCost + outputCost
+}
+
 // Check returns the current budget status and whether the budget has been exceeded.
 func (b *BudgetManager) Check() (BudgetStatus, bool) {
 	b.mu.RLock()
@@ -150,17 +167,26 @@ func (m *budgetMiddleware) AfterModelRewriteState(
 	mc *adk.ModelContext,
 ) (context.Context, *adk.ChatModelAgentState, error) {
 	var promptTokens, completionTokens int64
+	var sessionPrompt, sessionCompletion, sessionCached int64
 	if m.tokenUsage != nil {
-		promptTokens, completionTokens, _ = m.tokenUsage.Get()
+		// Per-turn delta for the per-agent-turn TOKEN cap (max_tokens_per_turn):
+		// runner.BeginTurn sets the baseline at turn start. Reading cumulative
+		// Get() here made the "per turn" cap behave as a session total.
+		promptTokens, completionTokens, _ = m.tokenUsage.TurnUsage()
+		// Session-cumulative for the COST cap (max_cost_per_session): cost must
+		// accumulate across turns, not reset each turn.
+		full := m.tokenUsage.GetFull()
+		sessionPrompt = int64(full.PromptTokens)
+		sessionCompletion = int64(full.CompletionTokens)
+		sessionCached = int64(full.CachedTokens)
 	}
 
-	// Sync budget manager with per-agent token tracker values.
+	// promptTokens/completionTokens drive the per-turn token cap; totalCost is the
+	// session-cumulative cost (cached subset billed at the cache-read rate).
 	m.manager.mu.Lock()
 	m.manager.promptTokens = promptTokens
 	m.manager.completionTokens = completionTokens
-	inputCost := float64(promptTokens) * m.manager.pricing.InputPer1M / 1_000_000
-	outputCost := float64(completionTokens) * m.manager.pricing.OutputPer1M / 1_000_000
-	m.manager.totalCost = inputCost + outputCost
+	m.manager.totalCost = m.manager.costLocked(sessionPrompt, sessionCompletion, sessionCached)
 	m.manager.mu.Unlock()
 
 	status := m.manager.Status()

internal/agent/budget_test.go

@@ -0,0 +1,55 @@
+package agent
+
+import (
+	"testing"
+
+	"github.com/cnjack/jcode/internal/config"
+	internalmodel "github.com/cnjack/jcode/internal/model"
+)
+
+// TestBudgetCost_CacheReadDiscount verifies the cached subset of the prompt is
+// billed at the discounted cache-read rate when the registry has it, and at the
+// full input rate otherwise (S3).
+func TestBudgetCost_CacheReadDiscount(t *testing.T) {
+	bm := NewBudgetManager(nil, internalmodel.ModelPricing{InputPer1M: 10, OutputPer1M: 30, CacheReadPer1M: 1})
+	// 1000 prompt (800 cached) + 100 completion.
+	got := bm.costLocked(1000, 100, 800)
+	want := float64(200)*10/1e6 + float64(800)*1/1e6 + float64(100)*30/1e6
+	if got != want {
+		t.Errorf("discounted cost = %v, want %v", got, want)
+	}
+
+	// No cache pricing → cached billed at full input rate (no discount applied).
+	plain := NewBudgetManager(nil, internalmodel.ModelPricing{InputPer1M: 10, OutputPer1M: 30})
+	got = plain.costLocked(1000, 100, 800)
+	want = float64(1000)*10/1e6 + float64(100)*30/1e6
+	if got != want {
+		t.Errorf("no-discount cost = %v, want %v", got, want)
+	}
+
+	// cached clamped to prompt (never negative uncached portion).
+	if c := bm.costLocked(100, 0, 999); c < 0 {
+		t.Errorf("cached>prompt produced negative cost: %v", c)
+	}
+}
+
+// TestBudget_MaxTokensPerTurn verifies the per-turn cap trips on the (per-turn)
+// token total it is given, not before (C5: the middleware now feeds it the
+// turn delta rather than the session cumulative).
+func TestBudget_MaxTokensPerTurn(t *testing.T) {
+	bm := NewBudgetManager(&config.BudgetConfig{MaxTokensPerTurn: 1000}, internalmodel.ModelPricing{})
+
+	bm.mu.Lock()
+	bm.promptTokens, bm.completionTokens = 600, 300 // 900 < 1000
+	bm.mu.Unlock()
+	if _, exceeded := bm.Check(); exceeded {
+		t.Error("900 tokens should not exceed a 1000 per-turn cap")
+	}
+
+	bm.mu.Lock()
+	bm.completionTokens = 500 // 1100 >= 1000
+	bm.mu.Unlock()
+	if _, exceeded := bm.Check(); !exceeded {
+		t.Error("1100 tokens should exceed a 1000 per-turn cap")
+	}
+}

internal/agent/compaction.go

@@ -179,11 +179,14 @@ func (m *compactionMiddleware) BeforeModelRewriteState(
 	state *adk.ChatModelAgentState,
 	mc *adk.ModelContext,
 ) (context.Context, *adk.ChatModelAgentState, error) {
-	// Estimate current token usage from the per-agent tracker.
+	// Estimate current context occupancy from the per-agent tracker. Use the LAST
+	// call's total (GetLastTotal), NOT the cumulative prompt sum: the agent
+	// re-sends the whole context on every tool-loop call, so cumulative prompt
+	// (e.g. 20k×5=100k) would trip compaction far too early while the real window
+	// is still ~20k.
 	var currentTokens int
 	if m.tokenUsage != nil {
-		promptTokens, _, _ := m.tokenUsage.Get()
-		currentTokens = int(promptTokens)
+		currentTokens = int(m.tokenUsage.GetLastTotal())
 	}
 
 	if !m.strategy.ShouldCompact(currentTokens, m.contextLimit) {

internal/command/interactive.go

@@ -185,7 +185,7 @@ func (s *interactiveState) createAgent() (*adk.ChatModelAgent, error) {
 			s.summCapture.Capture(summary.Content, contextN)
 			config.Logger().Printf("[summarization] Finalize: compacted %d context messages", contextN)
 			if s.agentTokenUsage != nil {
-				s.agentTokenUsage.Reset()
+				s.agentTokenUsage.ResetContext()
 			}
 			return append(systemMsgs, summary), nil
 		},
@@ -228,7 +228,8 @@ func (s *interactiveState) createAgent() (*adk.ChatModelAgent, error) {
 	if s.cfg.Budget != nil {
 		providerName, modelName := s.cfg.GetProviderModel()
 		inputPer1M, outputPer1M := s.registry.GetModelCost(providerName, modelName)
-		pricing := internalmodel.ModelPricing{InputPer1M: inputPer1M, OutputPer1M: outputPer1M}
+		cacheReadPer1M, _ := s.registry.GetModelCacheCost(providerName, modelName)
+		pricing := internalmodel.ModelPricing{InputPer1M: inputPer1M, OutputPer1M: outputPer1M, CacheReadPer1M: cacheReadPer1M}
 		budgetManager := agent.NewBudgetManager(s.cfg.Budget, pricing)
 		budgetMw := agent.NewBudgetMiddleware(budgetManager, s.agentTokenUsage, func(status agent.BudgetStatus) {
 			config.Logger().Printf("[budget] warning level=%d cost=%.4f", status.WarningLevel, status.EstimatedCost)
@@ -240,7 +241,7 @@ func (s *interactiveState) createAgent() (*adk.ChatModelAgent, error) {
 	compactionStrategy := agent.NewThresholdCompactionStrategy(compactThreshold, s.chatModel, 6)
 	compactionMw := agent.NewCompactionMiddleware(compactionStrategy, contextLimit, s.agentTokenUsage, func(savedTokens int) {
 		if s.agentTokenUsage != nil {
-			s.agentTokenUsage.Reset()
+			s.agentTokenUsage.ResetContext()
 		}
 		if s.p != nil {
 			s.p.Send(tui.CompactDoneMsg{OldTokens: 0, NewTokens: 0})
@@ -318,7 +319,7 @@ func (s *interactiveState) applyModeSwitch(newMode tui.AgentMode) {
 		config.Logger().Printf("[plan] agent creation failed: %v", err)
 	}
 	if s.agentTokenUsage != nil {
-		s.agentTokenUsage.Reset()
+		s.agentTokenUsage.ResetContext()
 	}
 	// Sync the TUI mode pill with the resulting unified mode (covers the
 	// plan-completion revert to Normal, which the user did not trigger directly).
@@ -592,6 +593,10 @@ func (s *interactiveState) handleConfig(cfgMsg *config.Config) {
 		return
 	}
 	s.chatModel = newChatModel
+	// Attribute subsequent usage to the newly selected model.
+	if s.rec != nil {
+		s.rec.SetModel(newModelName)
+	}
 
 	// Rebuild system prompt and tools to reflect config changes (e.g., SSH aliases)
 	if s.agentMode == tui.ModePlanning {
@@ -622,7 +627,7 @@ func (s *interactiveState) handleCompact() {
 		s.rec.RecordCompact(s.history[0].Content, oldLen-len(s.history))
 	}
 	if s.agentTokenUsage != nil {
-		s.agentTokenUsage.Reset()
+		s.agentTokenUsage.ResetContext()
 	}
 	s.p.Send(tui.CompactDoneMsg{
 		OldTokens: oldTokens,
@@ -665,6 +670,9 @@ func (s *interactiveState) handleAddModel() {
 		return
 	}
 	s.chatModel = newChatModel
+	if s.rec != nil {
+		s.rec.SetModel(newModelName)
+	}
 	if newAg, agErr := s.createAgent(); agErr == nil {
 		s.ag = newAg
 	}