| 1 | package agent |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "math" |
| 6 | "strings" |
| 7 | "sync" |
| 8 | "sync/atomic" |
| 9 | "time" |
| 10 | "unicode/utf8" |
| 11 | |
| 12 | "reasonix/internal/nilutil" |
| 13 | "reasonix/internal/provider" |
| 14 | ) |
| 15 | |
| 16 | const ( |
| 17 | outputBudgetReserve = 8 * 1024 |
| 18 | minOutputBudgetReserve = protocolReserveTokens |
| 19 | ) |
| 20 | |
| 21 | const learnedOutputBudgetTTL = 24 * time.Hour |
| 22 | |
| 23 | type learnedOutputBudgetCacheEntry struct { |
| 24 | completionBudget int |
| 25 | expiresAt time.Time |
| 26 | } |
| 27 | |
| 28 | var learnedOutputBudgetCache = struct { |
| 29 | sync.Mutex |
| 30 | entries map[string]learnedOutputBudgetCacheEntry |
| 31 | }{entries: make(map[string]learnedOutputBudgetCacheEntry)} |
| 32 | |
| 33 | type outputBudgetState struct { |
| 34 | outputBudget int |
| 35 | // lastUsage caches the latest provider telemetry for per-turn readouts. |
| 36 | // The run loop writes it while a frontend reads it, so it is atomic. |
| 37 | lastUsage atomic.Pointer[provider.Usage] |
| 38 | activeReqShape atomic.Pointer[requestCalibrationShape] |
| 39 | promptCalibration atomic.Pointer[promptTokenCalibration] |
| 40 | contextUsage atomic.Pointer[contextUsage] // gauge's memoised prompt size |
| 41 | learned atomic.Pointer[learnedContextBudget] |
| 42 | admission atomic.Pointer[contextAdmission] |
| 43 | truncation atomic.Pointer[promptTruncation] |
| 44 | } |
| 45 | |
| 46 | // learnedContextBudget is an Agent-local observation of the live provider/model |
| 47 | // window. Completion limits are additionally shared through the short-lived |
| 48 | // provider/model cache below so a model rebuild does not immediately repeat a |
| 49 | // known over-limit request. The cache is deliberately in-memory and expires |
| 50 | // after one day; it is not a persisted global provider limit. |
| 51 | type learnedContextBudget struct { |
| 52 | windowTokens int |
| 53 | completionBudget int |
| 54 | } |
| 55 | |
| 56 | const ( |
| 57 | contextRecoveryNone = "none" |
| 58 | contextRecoveryProactiveClip = "proactive_clip" |
| 59 | contextRecoveryLearnedRetry = "learned_retry" |
| 60 | contextRecoveryCompacted = "compacted" |
| 61 | contextRecoveryFailed = "failed" |
| 62 | ) |
| 63 | |
| 64 | type contextAdmission struct { |
| 65 | WindowMode string |
| 66 | LimitMode string |
| 67 | Source string |
| 68 | WindowTokens int |
| 69 | PromptTokens int |
| 70 | AutoOutputTokens int |
| 71 | MaxOutputTokens int |
| 72 | RequestedOutputTokens int |
| 73 | EffectiveOutputTokens int |
| 74 | ReserveTokens int |
| 75 | PhysicalRemaining int |
| 76 | Clipped bool |
| 77 | ApplyMaxTokens bool |
| 78 | LastRecovery string |
| 79 | ObservedWindow int |
| 80 | ObservedPrompt int |
| 81 | ObservedCompletion int |
| 82 | } |
| 83 | |
| 84 | type promptTokenCalibration struct { |
| 85 | promptTokens int |
| 86 | requestChars int64 |
| 87 | compactChars int64 |
| 88 | cjkRunes int64 |
| 89 | cjkBytes int64 |
| 90 | } |
| 91 | |
| 92 | // requestCalibrationShape pairs the conservative provider-visible text and CJK |
| 93 | // composition used for overflow protection with the legacy content-only shape |
| 94 | // used by fold economics. Keeping them in one immutable pointer ensures readers |
| 95 | // never combine calibration fields from different prepared requests. |
| 96 | type requestCalibrationShape struct { |
| 97 | requestChars int64 |
| 98 | compactChars int64 |
| 99 | cjkRunes int64 |
| 100 | cjkBytes int64 |
| 101 | } |
| 102 | |
| 103 | // reset drops what belongs to the transcript being replaced. Prompt-token |
| 104 | // calibration and the learned window are properties of the bound model/provider, |
| 105 | // and a model switch rebuilds the Agent, so they outlive SetSession. Admission |
| 106 | // describes one transcript's latest request and must never bleed into the next. |
| 107 | func (o *outputBudgetState) reset() { |
| 108 | o.lastUsage.Store(nil) |
| 109 | o.activeReqShape.Store(nil) |
| 110 | o.admission.Store(nil) |
| 111 | o.contextUsage.Store(nil) |
| 112 | } |
| 113 | |
| 114 | func (a *Agent) setPromptTokenCalibration(promptTokens int, shape requestCalibrationShape) { |
| 115 | if a == nil || promptTokens <= 0 || shape.requestChars <= 0 { |
| 116 | return |
| 117 | } |
| 118 | // A prompt the provider truncated describes its own ceiling, not this |
| 119 | // model's tokenizer. Learning from it shrinks every later estimate, which |
| 120 | // delays compaction and truncates more of the next prompt. |
| 121 | if ceiling := promptTruncationCeiling(promptTokens, shape, a.sess.output.promptCalibration.Load()); ceiling > 0 { |
| 122 | a.notePromptTruncation(ceiling) |
| 123 | return |
| 124 | } |
| 125 | a.sess.output.promptCalibration.Store(&promptTokenCalibration{ |
| 126 | promptTokens: promptTokens, |
| 127 | requestChars: shape.requestChars, |
| 128 | compactChars: shape.compactChars, |
| 129 | cjkRunes: shape.cjkRunes, |
| 130 | cjkBytes: shape.cjkBytes, |
| 131 | }) |
| 132 | } |
| 133 | |
| 134 | func (a *Agent) setPromptTokenCalibrationFromActive(promptTokens int) { |
| 135 | if a == nil { |
| 136 | return |
| 137 | } |
| 138 | if shape := a.sess.output.activeReqShape.Load(); shape != nil { |
| 139 | a.setPromptTokenCalibration(promptTokens, *shape) |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | // setPromptTokenCalibrationFromUsage trusts provider telemetry only; |
| 144 | // reconstructed usage remains available for accounting but not admission. |
| 145 | func (a *Agent) setPromptTokenCalibrationFromUsage(usage *provider.Usage) { |
| 146 | if a == nil || usage == nil || usage.Estimated { |
| 147 | return |
| 148 | } |
| 149 | a.setPromptTokenCalibrationFromActive(usage.LatestPromptTokens()) |
| 150 | } |
| 151 | |
| 152 | func outputBudgetOf(p provider.Provider) int { |
| 153 | if nilutil.IsNil(p) { |
| 154 | return 0 |
| 155 | } |
| 156 | if budget, ok := p.(provider.OutputBudgetProvider); ok { |
| 157 | return budget.OutputBudget() |
| 158 | } |
| 159 | return 0 |
| 160 | } |
| 161 | |
| 162 | func sharesContextWindow(p provider.Provider) bool { |
| 163 | return contextBudgetPolicyOf(p).WindowMode == provider.ContextWindowShared |
| 164 | } |
| 165 | |
| 166 | func contextBudgetPolicyOf(p provider.Provider) provider.ContextBudgetPolicy { |
| 167 | if nilutil.IsNil(p) { |
| 168 | return provider.ContextBudgetPolicy{} |
| 169 | } |
| 170 | return provider.ResolveContextBudgetPolicy(p) |
| 171 | } |
| 172 | |
| 173 | func (a *Agent) learnOutputBudget(limit int) { |
| 174 | if a == nil || limit <= 0 { |
| 175 | return |
| 176 | } |
| 177 | cacheLearnedOutputBudget(outputBudgetCacheKey(a), limit) |
| 178 | current := a.sess.output.learned.Load() |
| 179 | if current != nil && current.completionBudget > 0 && current.completionBudget <= limit { |
| 180 | return |
| 181 | } |
| 182 | learned := &learnedContextBudget{completionBudget: limit} |
| 183 | if current != nil { |
| 184 | learned.windowTokens = current.windowTokens |
| 185 | } |
| 186 | a.sess.output.learned.Store(learned) |
| 187 | } |
| 188 | |
| 189 | func outputBudgetCacheKey(a *Agent) string { |
| 190 | if a == nil { |
| 191 | return "" |
| 192 | } |
| 193 | providerName := "" |
| 194 | if !nilutil.IsNil(a.svc.prov) { |
| 195 | providerName = strings.TrimSpace(a.svc.prov.Name()) |
| 196 | } |
| 197 | modelRef := strings.TrimSpace(a.modelRef) |
| 198 | if providerName == "" && modelRef == "" { |
| 199 | return "" |
| 200 | } |
| 201 | // Provider names are route-specific for the built-in OpenCode Go entries; |
| 202 | // retaining modelRef as a second component keeps custom routes isolated too. |
| 203 | return providerName + "|" + modelRef |
| 204 | } |
| 205 | |
| 206 | func cacheLearnedOutputBudget(key string, limit int) { |
| 207 | if strings.TrimSpace(key) == "" || limit <= 0 { |
| 208 | return |
| 209 | } |
| 210 | now := time.Now() |
| 211 | learnedOutputBudgetCache.Lock() |
| 212 | defer learnedOutputBudgetCache.Unlock() |
| 213 | if current, ok := learnedOutputBudgetCache.entries[key]; ok && current.expiresAt.After(now) && current.completionBudget > 0 && current.completionBudget <= limit { |
| 214 | return |
| 215 | } |
| 216 | learnedOutputBudgetCache.entries[key] = learnedOutputBudgetCacheEntry{ |
| 217 | completionBudget: limit, |
| 218 | expiresAt: now.Add(learnedOutputBudgetTTL), |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | func cachedLearnedOutputBudget(key string) int { |
| 223 | if strings.TrimSpace(key) == "" { |
| 224 | return 0 |
| 225 | } |
| 226 | now := time.Now() |
| 227 | learnedOutputBudgetCache.Lock() |
| 228 | defer learnedOutputBudgetCache.Unlock() |
| 229 | entry, ok := learnedOutputBudgetCache.entries[key] |
| 230 | if !ok { |
| 231 | return 0 |
| 232 | } |
| 233 | if !entry.expiresAt.After(now) { |
| 234 | delete(learnedOutputBudgetCache.entries, key) |
| 235 | return 0 |
| 236 | } |
| 237 | return entry.completionBudget |
| 238 | } |
| 239 | |
| 240 | func sharedWindowInputPolicyOf(p provider.Provider) provider.SharedWindowInputPolicy { |
| 241 | if nilutil.IsNil(p) { |
| 242 | return provider.SharedWindowInputPolicy{} |
| 243 | } |
| 244 | policy, ok := p.(provider.SharedWindowInputPolicyProvider) |
| 245 | if !ok { |
| 246 | return provider.SharedWindowInputPolicy{} |
| 247 | } |
| 248 | return policy.SharedWindowInputPolicy() |
| 249 | } |
| 250 | |
| 251 | func requestCalibrationShapeOf(req provider.Request) requestCalibrationShape { |
| 252 | return requestCalibrationShapeWithPolicy(req, provider.SharedWindowInputPolicy{}) |
| 253 | } |
| 254 | |
| 255 | func (a *Agent) requestCalibrationShape(req provider.Request) requestCalibrationShape { |
| 256 | return requestCalibrationShapeWithPolicy(req, sharedWindowInputPolicyOf(a.svc.prov)) |
| 257 | } |
| 258 | |
| 259 | func requestCalibrationShapeWithPolicy(req provider.Request, policy provider.SharedWindowInputPolicy) requestCalibrationShape { |
| 260 | requestChars, cjkRunes, cjkBytes := requestCalibrationTextShape(req, policy) |
| 261 | return requestCalibrationShape{ |
| 262 | requestChars: requestChars, |
| 263 | compactChars: int64(charsOfMessages(req.Messages)), |
| 264 | cjkRunes: cjkRunes, |
| 265 | cjkBytes: cjkBytes, |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | // requestCalibrationTextShape counts common shared-window text plus only the |
| 270 | // adapter-specific replay fields declared by the active provider. This keeps |
| 271 | // omitted bytes out of the ratio without missing newly appended wire content. |
| 272 | func requestCalibrationTextShape(req provider.Request, policy provider.SharedWindowInputPolicy) (chars, cjkRunes, cjkBytes int64) { |
| 273 | add := func(s string) { |
| 274 | chars += int64(len(s)) |
| 275 | for _, r := range s { |
| 276 | if isCJKRune(r) { |
| 277 | cjkRunes++ |
| 278 | cjkBytes += int64(utf8.RuneLen(r)) |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | for _, msg := range req.Messages { |
| 283 | if msg.LocalOnly { |
| 284 | continue |
| 285 | } |
| 286 | chars += 4 |
| 287 | add(string(msg.Role)) |
| 288 | add(msg.Content) |
| 289 | if msg.Role == provider.RoleAssistant && (len(msg.ToolCalls) > 0 || policy.ReplaysOrdinaryReasoning) { |
| 290 | add(msg.ReasoningContent) |
| 291 | } |
| 292 | add(msg.Name) |
| 293 | add(msg.ToolCallID) |
| 294 | for _, call := range msg.ToolCalls { |
| 295 | chars += 8 |
| 296 | add(call.ID) |
| 297 | add(call.Name) |
| 298 | add(call.Arguments) |
| 299 | } |
| 300 | if policy.ReplaysResponsesItems { |
| 301 | for _, item := range msg.ResponsesItems { |
| 302 | add(string(item)) |
| 303 | } |
| 304 | } |
| 305 | for _, search := range msg.ServerSearch { |
| 306 | provider.WalkServerSearchEstimate(search, add) |
| 307 | } |
| 308 | } |
| 309 | for _, schema := range req.Tools { |
| 310 | chars += 8 |
| 311 | add(schema.Name) |
| 312 | add(schema.Description) |
| 313 | add(string(schema.Parameters)) |
| 314 | } |
| 315 | return chars, cjkRunes, cjkBytes |
| 316 | } |
| 317 | |
| 318 | func (a *Agent) calibratedPromptTokens(shape requestCalibrationShape) (int, bool) { |
| 319 | if shape.requestChars <= 0 { |
| 320 | return 0, false |
| 321 | } |
| 322 | if cal := a.sess.output.promptCalibration.Load(); cal != nil && cal.requestChars > 0 { |
| 323 | ratio := float64(cal.promptTokens) / float64(cal.requestChars) |
| 324 | if ratio > 0.05 && ratio < 2 { |
| 325 | trustedChars := shape.requestChars |
| 326 | excessCJKBytes := int64(0) |
| 327 | // A higher CJK share cannot safely reuse the aggregate ratio. Scale its |
| 328 | // represented share and price only the excess at the cold rate, |
| 329 | // preserving exact calibration for stable CJK sessions. |
| 330 | if shape.cjkRunes*cal.requestChars > cal.cjkRunes*shape.requestChars { |
| 331 | trustedCJKBytes := min(cal.cjkBytes*shape.requestChars/cal.requestChars, shape.cjkBytes) |
| 332 | excessCJKBytes = shape.cjkBytes - trustedCJKBytes |
| 333 | trustedChars -= excessCJKBytes |
| 334 | } |
| 335 | cold := math.Ceil(float64(excessCJKBytes) * fallbackTokPerChar) |
| 336 | return int(math.Ceil(float64(trustedChars)*ratio) + cold), true |
| 337 | } |
| 338 | } |
| 339 | return 0, false |
| 340 | } |
| 341 | |
| 342 | // estimatedPromptTokens sizes the provider-visible messages in real tokens — |
| 343 | // the only unit comparable against the context window. Same-session usage |
| 344 | // calibrates it; before that the wire character count carries the ~4 chars per |
| 345 | // token shape. estimateMessagesTokens counts characters and is for internal |
| 346 | // planning budgets only; against the window it would compact 4x early. |
| 347 | func (a *Agent) estimatedPromptTokens(msgs []provider.Message) int { |
| 348 | return a.estimatedShapeTokens(a.requestCalibrationShape(provider.Request{Messages: msgs})) |
| 349 | } |
| 350 | |
| 351 | func (a *Agent) estimatedRequestTokens(req provider.Request) int { |
| 352 | return a.estimatedShapeTokens(a.requestCalibrationShape(req)) |
| 353 | } |
| 354 | |
| 355 | func (a *Agent) estimatedShapeTokens(shape requestCalibrationShape) int { |
| 356 | if shape.requestChars <= 0 { |
| 357 | return 0 |
| 358 | } |
| 359 | if calibrated, ok := a.calibratedPromptTokens(shape); ok { |
| 360 | return calibrated |
| 361 | } |
| 362 | return int(float64(shape.requestChars) * fallbackTokPerChar) |
| 363 | } |
| 364 | |
| 365 | func isCJKRune(r rune) bool { |
| 366 | return (r >= 0x4E00 && r <= 0x9FFF) || |
| 367 | (r >= 0x3400 && r <= 0x4DBF) || |
| 368 | (r >= 0x3040 && r <= 0x30FF) || |
| 369 | (r >= 0xAC00 && r <= 0xD7AF) |
| 370 | } |
| 371 | |
| 372 | func (a *Agent) effectiveContextWindow() int { |
| 373 | if a == nil { |
| 374 | return 0 |
| 375 | } |
| 376 | cfg := a.contextWindow |
| 377 | learned := 0 |
| 378 | if snap := a.sess.output.learned.Load(); snap != nil { |
| 379 | learned = snap.windowTokens |
| 380 | } |
| 381 | switch { |
| 382 | case cfg > 0 && learned > 0: |
| 383 | return min(cfg, learned) |
| 384 | case learned > 0: |
| 385 | return learned |
| 386 | default: |
| 387 | return cfg |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | func (a *Agent) learnedCompletionBudget() int { |
| 392 | if a == nil { |
| 393 | return 0 |
| 394 | } |
| 395 | cached := cachedLearnedOutputBudget(outputBudgetCacheKey(a)) |
| 396 | if snap := a.sess.output.learned.Load(); snap != nil { |
| 397 | if cached > 0 && (snap.completionBudget <= 0 || cached < snap.completionBudget) { |
| 398 | a.learnOutputBudget(cached) |
| 399 | return cached |
| 400 | } |
| 401 | return snap.completionBudget |
| 402 | } |
| 403 | if cached > 0 { |
| 404 | a.learnOutputBudget(cached) |
| 405 | return cached |
| 406 | } |
| 407 | return 0 |
| 408 | } |
| 409 | |
| 410 | func (a *Agent) learnContextBudget(window, completion int, omittedOutput bool) { |
| 411 | if a == nil { |
| 412 | return |
| 413 | } |
| 414 | cur := learnedContextBudget{} |
| 415 | if prev := a.sess.output.learned.Load(); prev != nil { |
| 416 | cur = *prev |
| 417 | } |
| 418 | if window > 0 { |
| 419 | if cur.windowTokens <= 0 || window < cur.windowTokens { |
| 420 | cur.windowTokens = window |
| 421 | } |
| 422 | } |
| 423 | if omittedOutput && completion > 0 { |
| 424 | cur.completionBudget = completion |
| 425 | } |
| 426 | next := cur |
| 427 | a.sess.output.learned.Store(&next) |
| 428 | } |
| 429 | |
| 430 | func (a *Agent) storeAdmission(adm contextAdmission) { |
| 431 | if a == nil { |
| 432 | return |
| 433 | } |
| 434 | cp := adm |
| 435 | a.sess.output.admission.Store(&cp) |
| 436 | } |
| 437 | |
| 438 | func (a *Agent) lastAdmission() contextAdmission { |
| 439 | if a == nil { |
| 440 | return contextAdmission{LastRecovery: contextRecoveryNone} |
| 441 | } |
| 442 | if snap := a.sess.output.admission.Load(); snap != nil { |
| 443 | return *snap |
| 444 | } |
| 445 | return contextAdmission{LastRecovery: contextRecoveryNone} |
| 446 | } |
| 447 | |
| 448 | func (a *Agent) setLastRecovery(kind string) { |
| 449 | if a == nil { |
| 450 | return |
| 451 | } |
| 452 | adm := a.lastAdmission() |
| 453 | adm.LastRecovery = kind |
| 454 | a.storeAdmission(adm) |
| 455 | } |
| 456 | |
| 457 | func admissionSource(userMax int, policy provider.ContextBudgetPolicy, learnedWindow bool) string { |
| 458 | if learnedWindow { |
| 459 | return provider.ContextBudgetSourceLearned |
| 460 | } |
| 461 | if userMax > 0 { |
| 462 | return provider.ContextBudgetSourceExplicit |
| 463 | } |
| 464 | switch { |
| 465 | case policy.AutoOutputTokens == provider.DeepSeekMaxOutputTokens && policy.LimitMode == provider.OutputLimitOmitWhenSafe: |
| 466 | return provider.ContextBudgetSourceOfficial |
| 467 | case policy.LimitMode == provider.OutputLimitAlways && policy.MaxOutputTokens > 0: |
| 468 | return provider.ContextBudgetSourceOpenCode |
| 469 | case policy.WindowMode == provider.ContextWindowUnknown || policy.AutoOutputTokens <= 0: |
| 470 | return provider.ContextBudgetSourceUnknown |
| 471 | default: |
| 472 | return provider.ContextBudgetSourceOfficial |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | // effectiveOutputBudget clips completion tokens at send time only; it never |
| 477 | // moves compact_ratio. Calibrated exhausted windows fail locally; a cold |
| 478 | // estimate that differs from the provider tokenizer uses bounded 400 recovery. |
| 479 | func (a *Agent) effectiveOutputBudget(req provider.Request) (int, bool, error) { |
| 480 | adm, err := a.admitOutputBudget(req) |
| 481 | if err != nil { |
| 482 | return 0, false, err |
| 483 | } |
| 484 | if !adm.ApplyMaxTokens || !adm.Clipped { |
| 485 | if adm.ApplyMaxTokens && adm.EffectiveOutputTokens > 0 && !adm.Clipped { |
| 486 | return adm.EffectiveOutputTokens, false, nil |
| 487 | } |
| 488 | return 0, false, nil |
| 489 | } |
| 490 | return adm.EffectiveOutputTokens, true, nil |
| 491 | } |
| 492 | |
| 493 | func (a *Agent) admitOutputBudget(req provider.Request) (contextAdmission, error) { |
| 494 | return a.admitOutputBudgetWithReserve(req, outputBudgetReserveForWindow(a.effectiveContextWindow()), false) |
| 495 | } |
| 496 | |
| 497 | // outputBudgetReserveForWindow preserves the original safety ratio: the 8K |
| 498 | // tokenizer/protocol cushion was chosen for a 1M-token window, so smaller |
| 499 | // windows reserve roughly the same 1/128 share. A 256-token floor covers |
| 500 | // framing, while the 8K cap keeps larger windows byte-stable. |
| 501 | func outputBudgetReserveForWindow(window int) int { |
| 502 | if window <= 0 { |
| 503 | return outputBudgetReserve |
| 504 | } |
| 505 | return min(outputBudgetReserve, max(minOutputBudgetReserve, window/128)) |
| 506 | } |
| 507 | |
| 508 | // admitSummaryOutputBudget uses the summary request's dedicated protocol |
| 509 | // reserve instead of the ordinary-turn reserve. Unknown gateways are treated |
| 510 | // as shared when an effective window exists: summary planning already makes |
| 511 | // that conservative assumption, so execution must enforce the same contract. |
| 512 | func (a *Agent) admitSummaryOutputBudget(req provider.Request) (contextAdmission, error) { |
| 513 | return a.admitOutputBudgetWithReserve(req, protocolReserveTokens, true) |
| 514 | } |
| 515 | |
| 516 | func shouldUseSharedWindowForAdmission(mode provider.ContextWindowMode, observedWindow int, conservativeUnknown bool) bool { |
| 517 | return mode == provider.ContextWindowUnknown && (observedWindow > 0 || conservativeUnknown) |
| 518 | } |
| 519 | |
| 520 | func (a *Agent) admitOutputBudgetWithReserve(req provider.Request, reserveTokens int, conservativeUnknown bool) (contextAdmission, error) { |
| 521 | adm := contextAdmission{ |
| 522 | ReserveTokens: reserveTokens, |
| 523 | LastRecovery: a.lastAdmission().LastRecovery, |
| 524 | Source: provider.ContextBudgetSourceUnknown, |
| 525 | } |
| 526 | if adm.LastRecovery == "" { |
| 527 | adm.LastRecovery = contextRecoveryNone |
| 528 | } |
| 529 | if a == nil { |
| 530 | return adm, nil |
| 531 | } |
| 532 | if learned := a.sess.output.learned.Load(); learned != nil { |
| 533 | adm.ObservedWindow = learned.windowTokens |
| 534 | adm.ObservedCompletion = learned.completionBudget |
| 535 | } |
| 536 | policy := contextBudgetPolicyOf(a.svc.prov) |
| 537 | if shouldUseSharedWindowForAdmission(policy.WindowMode, adm.ObservedWindow, conservativeUnknown) { |
| 538 | policy.WindowMode = provider.ContextWindowShared |
| 539 | } |
| 540 | if policy.AutoOutputTokens <= 0 && a.learnedCompletionBudget() > 0 { |
| 541 | policy.AutoOutputTokens = a.learnedCompletionBudget() |
| 542 | } |
| 543 | if learned := a.learnedCompletionBudget(); learned > 0 { |
| 544 | if policy.AutoOutputTokens <= 0 || learned < policy.AutoOutputTokens { |
| 545 | policy.AutoOutputTokens = learned |
| 546 | } |
| 547 | if policy.MaxOutputTokens <= 0 || learned < policy.MaxOutputTokens { |
| 548 | policy.MaxOutputTokens = learned |
| 549 | } |
| 550 | } |
| 551 | adm.WindowMode = policy.WindowMode.String() |
| 552 | adm.LimitMode = policy.LimitMode.String() |
| 553 | adm.AutoOutputTokens = policy.AutoOutputTokens |
| 554 | adm.MaxOutputTokens = policy.MaxOutputTokens |
| 555 | window := a.effectiveContextWindow() |
| 556 | adm.WindowTokens = window |
| 557 | learnedWindow := window > 0 && (a.contextWindow <= 0 || window < a.contextWindow) |
| 558 | adm.Source = admissionSource(req.MaxTokens, policy, learnedWindow) |
| 559 | if window <= 0 { |
| 560 | a.storeAdmission(adm) |
| 561 | return adm, nil |
| 562 | } |
| 563 | est := a.estimatedRequestTokens(req) |
| 564 | adm.PromptTokens = est |
| 565 | physical := window - est - reserveTokens |
| 566 | adm.PhysicalRemaining = physical |
| 567 | shared := policy.WindowMode == provider.ContextWindowShared |
| 568 | if !shared { |
| 569 | a.applyLimitMode(&adm, req.MaxTokens, policy, physical) |
| 570 | a.storeAdmission(adm) |
| 571 | return adm, nil |
| 572 | } |
| 573 | if physical <= 0 { |
| 574 | a.storeAdmission(adm) |
| 575 | return adm, fmt.Errorf("%w: estimated prompt %d leaves no shared-window output budget", ErrCompactionRequired, est) |
| 576 | } |
| 577 | requested := 0 |
| 578 | switch { |
| 579 | case req.MaxTokens > 0: |
| 580 | requested = req.MaxTokens |
| 581 | default: |
| 582 | requested = policy.AutoOutputTokens |
| 583 | } |
| 584 | if policy.MaxOutputTokens > 0 && requested > policy.MaxOutputTokens { |
| 585 | requested = policy.MaxOutputTokens |
| 586 | } |
| 587 | adm.RequestedOutputTokens = requested |
| 588 | if req.MaxTokens < 0 { |
| 589 | if requested > 0 && requested > physical { |
| 590 | a.storeAdmission(adm) |
| 591 | return adm, fmt.Errorf("%w: estimated prompt %d leaves no room for omitted auto output %d", ErrCompactionRequired, est, requested) |
| 592 | } |
| 593 | a.storeAdmission(adm) |
| 594 | return adm, nil |
| 595 | } |
| 596 | if requested <= 0 { |
| 597 | a.applyLimitMode(&adm, req.MaxTokens, policy, physical) |
| 598 | a.storeAdmission(adm) |
| 599 | return adm, nil |
| 600 | } |
| 601 | effective := requested |
| 602 | if effective > physical { |
| 603 | effective = physical |
| 604 | adm.Clipped = true |
| 605 | } |
| 606 | adm.EffectiveOutputTokens = effective |
| 607 | a.applyLimitMode(&adm, req.MaxTokens, policy, physical) |
| 608 | if adm.Clipped { |
| 609 | adm.ApplyMaxTokens = req.MaxTokens >= 0 && policy.LimitMode != provider.OutputLimitUnsupported |
| 610 | adm.EffectiveOutputTokens = effective |
| 611 | } |
| 612 | if adm.Clipped && adm.LastRecovery == contextRecoveryNone { |
| 613 | adm.LastRecovery = contextRecoveryProactiveClip |
| 614 | } |
| 615 | a.storeAdmission(adm) |
| 616 | return adm, nil |
| 617 | } |
| 618 | |
| 619 | func (a *Agent) applyAdmissionToRequest(req *provider.Request) error { |
| 620 | if a == nil || req == nil { |
| 621 | return nil |
| 622 | } |
| 623 | adm, err := a.admitOutputBudget(*req) |
| 624 | if err != nil { |
| 625 | return err |
| 626 | } |
| 627 | if adm.ApplyMaxTokens && adm.EffectiveOutputTokens > 0 { |
| 628 | req.MaxTokens = adm.EffectiveOutputTokens |
| 629 | } |
| 630 | return nil |
| 631 | } |
| 632 | |
| 633 | func (a *Agent) applySummaryAdmissionToRequest(req *provider.Request) error { |
| 634 | if a == nil || req == nil { |
| 635 | return nil |
| 636 | } |
| 637 | adm, err := a.admitSummaryOutputBudget(*req) |
| 638 | if err != nil { |
| 639 | return err |
| 640 | } |
| 641 | if adm.ApplyMaxTokens && adm.EffectiveOutputTokens > 0 { |
| 642 | req.MaxTokens = adm.EffectiveOutputTokens |
| 643 | } |
| 644 | return nil |
| 645 | } |
| 646 | |
| 647 | func (a *Agent) applyLimitMode(adm *contextAdmission, userMax int, policy provider.ContextBudgetPolicy, physical int) { |
| 648 | if userMax < 0 || policy.LimitMode == provider.OutputLimitUnsupported { |
| 649 | adm.ApplyMaxTokens = false |
| 650 | return |
| 651 | } |
| 652 | effective := adm.EffectiveOutputTokens |
| 653 | if effective <= 0 { |
| 654 | if userMax > 0 { |
| 655 | effective = userMax |
| 656 | } else { |
| 657 | effective = policy.AutoOutputTokens |
| 658 | } |
| 659 | if policy.MaxOutputTokens > 0 && effective > policy.MaxOutputTokens { |
| 660 | effective = policy.MaxOutputTokens |
| 661 | } |
| 662 | if policy.WindowMode == provider.ContextWindowShared && physical > 0 && effective > physical { |
| 663 | effective = physical |
| 664 | adm.Clipped = true |
| 665 | } |
| 666 | } |
| 667 | switch policy.LimitMode { |
| 668 | case provider.OutputLimitAlways, provider.OutputLimitRequired: |
| 669 | if effective > 0 { |
| 670 | adm.ApplyMaxTokens = true |
| 671 | adm.EffectiveOutputTokens = effective |
| 672 | } |
| 673 | case provider.OutputLimitOmitWhenSafe: |
| 674 | if userMax > 0 || adm.Clipped { |
| 675 | adm.ApplyMaxTokens = true |
| 676 | adm.EffectiveOutputTokens = effective |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 |