| 1 | package agent |
| 2 | |
| 3 | import "reasonix/internal/provider" |
| 4 | |
| 5 | // ContextMaintenanceSnapshot is a read-only view of the current provider-bound |
| 6 | // context. It separates present composition from cumulative summary-call cost. |
| 7 | type ContextMaintenanceSnapshot struct { |
| 8 | CanonicalTokens int |
| 9 | ProjectedTokens int |
| 10 | SummaryTokens int |
| 11 | LastSavedTokens int |
| 12 | SnipTrigger int |
| 13 | FoldTrigger int |
| 14 | ForceTrigger int |
| 15 | TriggerTokens int |
| 16 | CheckpointState string |
| 17 | HardInputCeiling int |
| 18 | Headroom int |
| 19 | ProjectionVersion uint64 |
| 20 | Blocked bool |
| 21 | LastReceipt *ContextMaintenanceReceipt |
| 22 | ContextBudget *ContextBudgetSnapshot |
| 23 | } |
| 24 | |
| 25 | // ContextBudgetSnapshot is the optional send-time admission view for the |
| 26 | // desktop Context Panel. All fields are optional for older frontends. |
| 27 | type ContextBudgetSnapshot struct { |
| 28 | WindowMode string |
| 29 | LimitMode string |
| 30 | Source string |
| 31 | WindowTokens int |
| 32 | PromptTokens int |
| 33 | AutoOutputTokens int |
| 34 | MaxOutputTokens int |
| 35 | RequestedOutputTokens int |
| 36 | EffectiveOutputTokens int |
| 37 | ReserveTokens int |
| 38 | PhysicalRemaining int |
| 39 | Clipped bool |
| 40 | LastRecovery string |
| 41 | ObservedWindow int |
| 42 | ObservedPrompt int |
| 43 | ObservedCompletion int |
| 44 | } |
| 45 | |
| 46 | func (a *Agent) ContextMaintenanceSnapshot() ContextMaintenanceSnapshot { |
| 47 | if a == nil || a.sess.conversation == nil { |
| 48 | return ContextMaintenanceSnapshot{} |
| 49 | } |
| 50 | canonical, _ := a.sess.conversation.snapshotMessagesVersion() |
| 51 | a.sess.compactionMu.Lock() |
| 52 | state := a.sess.compactionState |
| 53 | checkpointState := a.sess.checkpointState |
| 54 | a.sess.compactionMu.Unlock() |
| 55 | visible := canonical |
| 56 | valid := projectionValid(state, canonical, a.currentPromptCacheKey()) |
| 57 | if valid { |
| 58 | if projected := modelVisibleFromProjection(state.Projection, canonical); len(projected) > 0 { |
| 59 | visible = projected |
| 60 | } |
| 61 | } |
| 62 | trigger := a.compactTrigger() |
| 63 | // UI checkpoint label requires a still-valid covered prefix, not merely |
| 64 | // that the sidecar loaded. |
| 65 | uiCheckpoint := "none" |
| 66 | if valid && len(state.Projection.Messages) > 0 { |
| 67 | uiCheckpoint = stateCheckpointState(checkpointState, state) |
| 68 | } |
| 69 | snapshot := ContextMaintenanceSnapshot{ |
| 70 | CanonicalTokens: a.estimatedVisibleRequestTokens(canonical), |
| 71 | ProjectedTokens: a.estimatedVisibleRequestTokens(visible), |
| 72 | FoldTrigger: trigger, |
| 73 | TriggerTokens: trigger, |
| 74 | CheckpointState: uiCheckpoint, |
| 75 | HardInputCeiling: a.hardInputCeiling(), |
| 76 | ProjectionVersion: state.Projection.ProjectionVersion, |
| 77 | } |
| 78 | for _, msg := range visible { |
| 79 | if isCompactionSummary(msg) { |
| 80 | snapshot.SummaryTokens += a.estimatedPromptTokens([]provider.Message{msg}) |
| 81 | } |
| 82 | } |
| 83 | snapshot.Headroom = max(0, snapshot.HardInputCeiling-snapshot.ProjectedTokens) |
| 84 | currentHash := a.contextMaintenanceInputHash(visible) |
| 85 | if state.LastReceipt != nil { |
| 86 | receipt := *state.LastReceipt |
| 87 | snapshot.LastReceipt = &receipt |
| 88 | if receipt.Status == "applied" && (receipt.Action == "prune" || receipt.Action == "summary") { |
| 89 | snapshot.LastSavedTokens = receipt.SavedTokens |
| 90 | } |
| 91 | // Generation-scoped blocked/failed receipts match contextMaintenanceBlocked. |
| 92 | if receipt.Status == "blocked" || receipt.Status == "failed" { |
| 93 | snapshot.Blocked = true |
| 94 | } |
| 95 | } |
| 96 | // Legacy sidecars may only have top-level BlockedInputHash. |
| 97 | if !snapshot.Blocked && state.BlockedInputHash != "" && state.BlockedInputHash == currentHash { |
| 98 | snapshot.Blocked = true |
| 99 | } |
| 100 | if budget := a.lastAdmission(); budget.WindowTokens > 0 || budget.PromptTokens > 0 || budget.LastRecovery != "" && budget.LastRecovery != contextRecoveryNone { |
| 101 | snapshot.ContextBudget = &ContextBudgetSnapshot{ |
| 102 | WindowMode: budget.WindowMode, LimitMode: budget.LimitMode, Source: budget.Source, |
| 103 | WindowTokens: budget.WindowTokens, PromptTokens: budget.PromptTokens, |
| 104 | AutoOutputTokens: budget.AutoOutputTokens, MaxOutputTokens: budget.MaxOutputTokens, |
| 105 | RequestedOutputTokens: budget.RequestedOutputTokens, EffectiveOutputTokens: budget.EffectiveOutputTokens, |
| 106 | ReserveTokens: budget.ReserveTokens, PhysicalRemaining: budget.PhysicalRemaining, |
| 107 | Clipped: budget.Clipped, LastRecovery: budget.LastRecovery, |
| 108 | ObservedWindow: budget.ObservedWindow, ObservedPrompt: budget.ObservedPrompt, |
| 109 | ObservedCompletion: budget.ObservedCompletion, |
| 110 | } |
| 111 | } |
| 112 | return snapshot |
| 113 | } |
| 114 | |
| 115 | func stateCheckpointState(runtimeState string, state CompactionState) string { |
| 116 | if len(state.Projection.Messages) == 0 { |
| 117 | return "none" |
| 118 | } |
| 119 | if runtimeState == "applied" { |
| 120 | return "applied" |
| 121 | } |
| 122 | return "restored" |
| 123 | } |
| 124 |