| 1 | package agent |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "strings" |
| 8 | "sync" |
| 9 | "testing" |
| 10 | "time" |
| 11 | |
| 12 | "reasonix/internal/provider" |
| 13 | "reasonix/internal/store" |
| 14 | ) |
| 15 | |
| 16 | func sessionWithTurns(t *testing.T, path string, turns int) *Session { |
| 17 | t.Helper() |
| 18 | s := NewSession("sys") |
| 19 | for i := 0; i < turns; i++ { |
| 20 | s.Add(provider.Message{Role: provider.RoleUser, Content: "prompt " + strings.Repeat("x", 8)}) |
| 21 | s.Add(provider.Message{Role: provider.RoleAssistant, Content: "reply"}) |
| 22 | if err := s.SaveSnapshot(path); err != nil { |
| 23 | t.Fatalf("SaveSnapshot turn %d: %v", i, err) |
| 24 | } |
| 25 | } |
| 26 | return s |
| 27 | } |
| 28 | |
| 29 | func TestLoadSessionToleratesTornEventLogTail(t *testing.T) { |
| 30 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 31 | s := sessionWithTurns(t, path, 2) |
| 32 | want := len(s.Snapshot()) |
| 33 | |
| 34 | logPath := store.SessionEventLog(path) |
| 35 | f, err := os.OpenFile(logPath, os.O_WRONLY|os.O_APPEND, 0o644) |
| 36 | if err != nil { |
| 37 | t.Fatalf("open log: %v", err) |
| 38 | } |
| 39 | if _, err := f.Write([]byte(`{"schema_version":1,"type":"append","message_index":5,"mess`)); err != nil { |
| 40 | t.Fatalf("write torn tail: %v", err) |
| 41 | } |
| 42 | f.Close() |
| 43 | |
| 44 | loaded, err := LoadSession(path) |
| 45 | if err != nil { |
| 46 | t.Fatalf("LoadSession with torn tail: %v", err) |
| 47 | } |
| 48 | if len(loaded.Messages) != want { |
| 49 | t.Fatalf("messages with torn tail = %d, want %d", len(loaded.Messages), want) |
| 50 | } |
| 51 | if !loaded.eventLogDamaged { |
| 52 | t.Fatal("eventLogDamaged = false, want true for torn tail") |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | func TestSaveSnapshotHealsTornEventLogTail(t *testing.T) { |
| 57 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 58 | sessionWithTurns(t, path, 2) |
| 59 | |
| 60 | logPath := store.SessionEventLog(path) |
| 61 | intact, err := os.ReadFile(logPath) |
| 62 | if err != nil { |
| 63 | t.Fatalf("read log: %v", err) |
| 64 | } |
| 65 | if err := os.WriteFile(logPath, append(intact, []byte(`{"schema_version":1,"type":"ap`)...), 0o644); err != nil { |
| 66 | t.Fatalf("write torn log: %v", err) |
| 67 | } |
| 68 | |
| 69 | // A fresh runtime resumes the session and keeps chatting: the save must |
| 70 | // truncate the torn tail (not bury it) and the appended turn must replay. |
| 71 | resumed, err := LoadSession(path) |
| 72 | if err != nil { |
| 73 | t.Fatalf("LoadSession: %v", err) |
| 74 | } |
| 75 | resumed.Add(provider.Message{Role: provider.RoleUser, Content: "after crash"}) |
| 76 | if err := resumed.SaveSnapshot(path); err != nil { |
| 77 | t.Fatalf("SaveSnapshot after torn tail: %v", err) |
| 78 | } |
| 79 | |
| 80 | reloaded, err := LoadSession(path) |
| 81 | if err != nil { |
| 82 | t.Fatalf("LoadSession after heal: %v", err) |
| 83 | } |
| 84 | if reloaded.eventLogDamaged { |
| 85 | t.Fatal("event log still damaged after healing save") |
| 86 | } |
| 87 | tail := reloaded.Messages[len(reloaded.Messages)-1] |
| 88 | if tail.Content != "after crash" { |
| 89 | t.Fatalf("healed tail = %q, want %q", tail.Content, "after crash") |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | func TestLoadSessionIgnoresForeignEventLog(t *testing.T) { |
| 94 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 95 | sessionWithTurns(t, path, 1) |
| 96 | |
| 97 | // A file this build cannot own squats the native log path: undecodable |
| 98 | // bytes, or a legacy v0.x Claude-style event transcript left in place by |
| 99 | // migration. It must be read-ignored and never written to. |
| 100 | logPath := store.SessionEventLog(path) |
| 101 | foreign := "garbage that is not json\n" |
| 102 | if err := os.WriteFile(logPath, []byte(foreign), 0o644); err != nil { |
| 103 | t.Fatalf("write foreign log: %v", err) |
| 104 | } |
| 105 | |
| 106 | loaded, err := LoadSession(path) |
| 107 | if err != nil { |
| 108 | t.Fatalf("LoadSession with foreign log: %v", err) |
| 109 | } |
| 110 | if len(loaded.Messages) == 0 { |
| 111 | t.Fatal("expected checkpoint transcript, got empty session") |
| 112 | } |
| 113 | if loaded.eventLogDamaged { |
| 114 | t.Fatal("foreign log misreported as damaged native log") |
| 115 | } |
| 116 | |
| 117 | // Saves keep working checkpoint-only and never touch the foreign file. |
| 118 | loaded.Add(provider.Message{Role: provider.RoleUser, Content: "still works"}) |
| 119 | if err := loaded.SaveSnapshot(path); err != nil { |
| 120 | t.Fatalf("SaveSnapshot with foreign log: %v", err) |
| 121 | } |
| 122 | got, err := os.ReadFile(logPath) |
| 123 | if err != nil { |
| 124 | t.Fatalf("read foreign log: %v", err) |
| 125 | } |
| 126 | if string(got) != foreign { |
| 127 | t.Fatalf("foreign log was modified:\nbefore=%q\nafter=%q", foreign, got) |
| 128 | } |
| 129 | reloaded, err := LoadSession(path) |
| 130 | if err != nil { |
| 131 | t.Fatalf("LoadSession after checkpoint-only save: %v", err) |
| 132 | } |
| 133 | if got := reloaded.Messages[len(reloaded.Messages)-1].Content; got != "still works" { |
| 134 | t.Fatalf("checkpoint-only tail = %q, want %q", got, "still works") |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | func TestForceSaveLeavesLegacyEventTranscriptUntouched(t *testing.T) { |
| 139 | // The v0.x migration reconstructs sessions from legacy Claude-style |
| 140 | // ".events.jsonl" transcripts that live in the SAME directory the native |
| 141 | // session is imported into — i.e. exactly at the native event-log path. |
| 142 | // The import must succeed, and the user's original file must survive |
| 143 | // byte-for-byte. |
| 144 | dir := t.TempDir() |
| 145 | path := filepath.Join(dir, "chat-1.jsonl") |
| 146 | legacy := `{"type":"user.message","id":1,"ts":"t","turn":0,"text":"hello from v0.x"}` + "\n" + |
| 147 | `{"type":"model.final","id":2,"ts":"t","turn":0,"content":"hi","toolCalls":[],"usage":{},"costUsd":0}` + "\n" |
| 148 | logPath := store.SessionEventLog(path) |
| 149 | if err := os.WriteFile(logPath, []byte(legacy), 0o644); err != nil { |
| 150 | t.Fatalf("write legacy transcript: %v", err) |
| 151 | } |
| 152 | |
| 153 | s := NewSession("") |
| 154 | s.Add(provider.Message{Role: provider.RoleUser, Content: "hello from v0.x"}) |
| 155 | s.Add(provider.Message{Role: provider.RoleAssistant, Content: "hi"}) |
| 156 | if err := s.Save(path); err != nil { |
| 157 | t.Fatalf("force Save beside legacy transcript: %v", err) |
| 158 | } |
| 159 | |
| 160 | got, err := os.ReadFile(logPath) |
| 161 | if err != nil { |
| 162 | t.Fatalf("read legacy transcript: %v", err) |
| 163 | } |
| 164 | if string(got) != legacy { |
| 165 | t.Fatalf("legacy transcript modified:\nbefore=%q\nafter=%q", legacy, got) |
| 166 | } |
| 167 | loaded, err := LoadSession(path) |
| 168 | if err != nil { |
| 169 | t.Fatalf("LoadSession of imported session: %v", err) |
| 170 | } |
| 171 | if len(loaded.Messages) != 2 || loaded.Messages[1].Content != "hi" { |
| 172 | t.Fatalf("imported transcript = %+v", loaded.Messages) |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | // TestRepairPreservesDamagedTailBytes locks in the #6607 content-loss fix: |
| 177 | // bytes the tail repair truncates away — including intact turns buried behind |
| 178 | // an out-of-order record, the dual-writer shape — must be salvaged to the |
| 179 | // .damaged sidecar instead of discarded forever. |
| 180 | func TestRepairPreservesDamagedTailBytes(t *testing.T) { |
| 181 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 182 | sessionWithTurns(t, path, 2) |
| 183 | |
| 184 | logPath := store.SessionEventLog(path) |
| 185 | // An out-of-order append (as an interleaving second writer would leave) |
| 186 | // followed by a torn partial record: replay stops before both, and repair |
| 187 | // truncates both away. |
| 188 | buried := `{"schema_version":1,"type":"append","message_index":99,"messages":[{"role":"user","content":"buried turn"}],"created_at":"2026-01-01T00:00:00Z"}` + "\n" |
| 189 | torn := `{"schema_version":1,"type":"ap` |
| 190 | f, err := os.OpenFile(logPath, os.O_WRONLY|os.O_APPEND, 0o644) |
| 191 | if err != nil { |
| 192 | t.Fatalf("open log: %v", err) |
| 193 | } |
| 194 | if _, err := f.Write([]byte(buried + torn)); err != nil { |
| 195 | t.Fatalf("write damaged tail: %v", err) |
| 196 | } |
| 197 | f.Close() |
| 198 | |
| 199 | // The healing save truncates the tail; preservation must run first. |
| 200 | resumed, err := LoadSession(path) |
| 201 | if err != nil { |
| 202 | t.Fatalf("LoadSession: %v", err) |
| 203 | } |
| 204 | resumed.Add(provider.Message{Role: provider.RoleUser, Content: "after damage"}) |
| 205 | if err := resumed.SaveSnapshot(path); err != nil { |
| 206 | t.Fatalf("SaveSnapshot after damage: %v", err) |
| 207 | } |
| 208 | |
| 209 | salvaged, err := os.ReadFile(store.SessionEventLogDamaged(path)) |
| 210 | if err != nil { |
| 211 | t.Fatalf("read damaged sidecar: %v", err) |
| 212 | } |
| 213 | if !strings.Contains(string(salvaged), "buried turn") { |
| 214 | t.Fatalf("salvage sidecar is missing the buried turn:\n%s", salvaged) |
| 215 | } |
| 216 | if !strings.Contains(string(salvaged), `"damaged_tail":true`) { |
| 217 | t.Fatalf("salvage sidecar is missing the incident header:\n%s", salvaged) |
| 218 | } |
| 219 | // The log itself must be healed: replay to the end, no damage, and the |
| 220 | // buried record must not leak back into the transcript. |
| 221 | reloaded, err := LoadSession(path) |
| 222 | if err != nil { |
| 223 | t.Fatalf("LoadSession after heal: %v", err) |
| 224 | } |
| 225 | if reloaded.eventLogDamaged { |
| 226 | t.Fatal("event log still damaged after healing save") |
| 227 | } |
| 228 | for _, m := range reloaded.Messages { |
| 229 | if m.Content == "buried turn" { |
| 230 | t.Fatal("truncated record leaked back into the transcript") |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | // A second incident appends to the sidecar instead of overwriting the |
| 235 | // first salvage. |
| 236 | f, err = os.OpenFile(store.SessionEventLog(path), os.O_WRONLY|os.O_APPEND, 0o644) |
| 237 | if err != nil { |
| 238 | t.Fatalf("reopen log: %v", err) |
| 239 | } |
| 240 | if _, err := f.Write([]byte(`{"schema_version":1,"type":"append","message_index":77,"messages":[{"role":"user","content":"second incident"}],"created_at":"2026-01-01T00:00:00Z"}` + "\n")); err != nil { |
| 241 | t.Fatalf("write second damage: %v", err) |
| 242 | } |
| 243 | f.Close() |
| 244 | resumed2, err := LoadSession(path) |
| 245 | if err != nil { |
| 246 | t.Fatalf("LoadSession second incident: %v", err) |
| 247 | } |
| 248 | resumed2.Add(provider.Message{Role: provider.RoleUser, Content: "after second"}) |
| 249 | if err := resumed2.SaveSnapshot(path); err != nil { |
| 250 | t.Fatalf("SaveSnapshot second incident: %v", err) |
| 251 | } |
| 252 | salvaged, err = os.ReadFile(store.SessionEventLogDamaged(path)) |
| 253 | if err != nil { |
| 254 | t.Fatalf("read damaged sidecar after second incident: %v", err) |
| 255 | } |
| 256 | if !strings.Contains(string(salvaged), "buried turn") || !strings.Contains(string(salvaged), "second incident") { |
| 257 | t.Fatalf("salvage sidecar must keep both incidents:\n%s", salvaged) |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | func TestReplayStopsAtBrokenAppendChain(t *testing.T) { |
| 262 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 263 | sessionWithTurns(t, path, 1) |
| 264 | logPath := store.SessionEventLog(path) |
| 265 | // Append an event whose MessageIndex does not chain onto the transcript. |
| 266 | f, err := os.OpenFile(logPath, os.O_WRONLY|os.O_APPEND, 0o644) |
| 267 | if err != nil { |
| 268 | t.Fatalf("open log: %v", err) |
| 269 | } |
| 270 | if _, err := f.Write([]byte(`{"schema_version":1,"type":"append","message_index":99,"messages":[{"role":"user","content":"lost"}],"created_at":"2026-01-01T00:00:00Z"}` + "\n")); err != nil { |
| 271 | t.Fatalf("write broken chain: %v", err) |
| 272 | } |
| 273 | f.Close() |
| 274 | |
| 275 | replay, err := replaySessionEventLog(logPath) |
| 276 | if err != nil { |
| 277 | t.Fatalf("replay: %v", err) |
| 278 | } |
| 279 | if !replay.damaged { |
| 280 | t.Fatal("replay.damaged = false, want true for broken chain") |
| 281 | } |
| 282 | for _, m := range replay.msgs { |
| 283 | if m.Content == "lost" { |
| 284 | t.Fatal("broken-chain record leaked into replayed transcript") |
| 285 | } |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | func TestReplayRejectsUnsupportedSchemaVersion(t *testing.T) { |
| 290 | dir := t.TempDir() |
| 291 | logPath := filepath.Join(dir, "future.events.jsonl") |
| 292 | if err := os.WriteFile(logPath, []byte(`{"schema_version":99,"type":"replace","messages":[]}`+"\n"), 0o644); err != nil { |
| 293 | t.Fatalf("write future log: %v", err) |
| 294 | } |
| 295 | if _, err := replaySessionEventLog(logPath); err == nil { |
| 296 | t.Fatal("replay of future schema succeeded, want hard error (no silent truncation of newer writers)") |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | func TestReplaySessionEventLogEnforcesResourceBudgetsWithoutMutation(t *testing.T) { |
| 301 | dir := t.TempDir() |
| 302 | logPath := filepath.Join(dir, "bounded.events.jsonl") |
| 303 | replace := `{"schema_version":1,"type":"replace","messages":[{"role":"system","content":"sys"},{"role":"user","content":"prompt"}]}` + "\n" |
| 304 | appendEvent := `{"schema_version":1,"type":"append","message_index":2,"messages":[{"role":"assistant","content":"reply"}]}` + "\n" |
| 305 | contents := replace + appendEvent |
| 306 | if err := os.WriteFile(logPath, []byte(contents), 0o600); err != nil { |
| 307 | t.Fatalf("write event log: %v", err) |
| 308 | } |
| 309 | |
| 310 | tests := []struct { |
| 311 | name string |
| 312 | limits sessionReplayLimits |
| 313 | resource string |
| 314 | }{ |
| 315 | { |
| 316 | name: "encoded bytes", |
| 317 | limits: sessionReplayLimits{ |
| 318 | maxBytes: int64(len(contents) - 1), maxRecords: 10, maxMessages: 10, |
| 319 | }, |
| 320 | resource: "encoded_bytes", |
| 321 | }, |
| 322 | { |
| 323 | name: "event records", |
| 324 | limits: sessionReplayLimits{ |
| 325 | maxBytes: int64(len(contents) + 1), maxRecords: 1, maxMessages: 10, |
| 326 | }, |
| 327 | resource: "event_records", |
| 328 | }, |
| 329 | { |
| 330 | name: "messages", |
| 331 | limits: sessionReplayLimits{ |
| 332 | maxBytes: int64(len(contents) + 1), maxRecords: 10, maxMessages: 1, |
| 333 | }, |
| 334 | resource: "messages", |
| 335 | }, |
| 336 | { |
| 337 | name: "aggregate messages across records", |
| 338 | limits: sessionReplayLimits{ |
| 339 | maxBytes: int64(len(contents) + 1), maxRecords: 10, maxMessages: 2, |
| 340 | }, |
| 341 | resource: "messages", |
| 342 | }, |
| 343 | } |
| 344 | for _, tc := range tests { |
| 345 | t.Run(tc.name, func(t *testing.T) { |
| 346 | if _, err := replaySessionEventLogWithLimits(logPath, tc.limits); !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 347 | t.Fatalf("replay error = %v, want ErrSessionReplayLimitExceeded", err) |
| 348 | } else { |
| 349 | var limitErr *SessionReplayLimitError |
| 350 | if !errors.As(err, &limitErr) || limitErr.Resource != tc.resource { |
| 351 | t.Fatalf("limit error = %#v, want resource %q", limitErr, tc.resource) |
| 352 | } |
| 353 | if strings.Contains(err.Error(), logPath) { |
| 354 | t.Fatalf("user-facing error leaked local path: %q", err) |
| 355 | } |
| 356 | } |
| 357 | got, err := os.ReadFile(logPath) |
| 358 | if err != nil { |
| 359 | t.Fatalf("read event log after rejection: %v", err) |
| 360 | } |
| 361 | if string(got) != contents { |
| 362 | t.Fatal("resource-budget rejection modified the event log") |
| 363 | } |
| 364 | }) |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | func TestReplayChecksMessageBudgetBeforeDecodingOverLimitElement(t *testing.T) { |
| 369 | logPath := filepath.Join(t.TempDir(), "bounded-before-decode.events.jsonl") |
| 370 | // The third element is valid JSON but cannot decode into provider.Message. |
| 371 | // A two-message budget must reject it before attempting that decode. |
| 372 | events := `{"schema_version":1,"type":"replace","messages":[{}, {}, 42]}` + "\n" |
| 373 | if err := os.WriteFile(logPath, []byte(events), 0o600); err != nil { |
| 374 | t.Fatalf("write event log: %v", err) |
| 375 | } |
| 376 | |
| 377 | replay, err := replaySessionEventLogWithLimits(logPath, sessionReplayLimits{ |
| 378 | maxBytes: int64(len(events) + 1), maxRecords: 10, maxMessages: 2, |
| 379 | }) |
| 380 | if !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 381 | t.Fatalf("replay error = %v, want message replay limit", err) |
| 382 | } |
| 383 | var limitErr *SessionReplayLimitError |
| 384 | if !errors.As(err, &limitErr) || limitErr.Resource != "messages" || limitErr.Value != 3 { |
| 385 | t.Fatalf("limit error = %#v, want third message rejected before decode", limitErr) |
| 386 | } |
| 387 | if replay.records != 0 || len(replay.msgs) != 0 { |
| 388 | t.Fatalf("partial over-limit record was applied: records=%d messages=%d", replay.records, len(replay.msgs)) |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | func TestReplayChecksCollectionBudgetBeforeDecodingOverLimitElement(t *testing.T) { |
| 393 | logPath := filepath.Join(t.TempDir(), "bounded-collection-before-decode.events.jsonl") |
| 394 | // The third tool call cannot decode into provider.ToolCall. A two-item |
| 395 | // collection budget must reject it before constructing the typed slice. |
| 396 | events := `{"schema_version":1,"type":"replace","messages":[{"role":"assistant","tool_calls":[{}, {}, 42]}]}` + "\n" |
| 397 | if err := os.WriteFile(logPath, []byte(events), 0o600); err != nil { |
| 398 | t.Fatalf("write event log: %v", err) |
| 399 | } |
| 400 | |
| 401 | replay, err := replaySessionEventLogWithLimits(logPath, sessionReplayLimits{ |
| 402 | maxBytes: int64(len(events) + 1), maxRecords: 10, maxMessages: 10, maxCollectionItems: 2, |
| 403 | }) |
| 404 | if !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 405 | t.Fatalf("replay error = %v, want collection replay limit", err) |
| 406 | } |
| 407 | var limitErr *SessionReplayLimitError |
| 408 | if !errors.As(err, &limitErr) || limitErr.Resource != "message_collection_items" || limitErr.Value != 3 { |
| 409 | t.Fatalf("limit error = %#v, want third collection item rejected before decode", limitErr) |
| 410 | } |
| 411 | if replay.records != 0 || len(replay.msgs) != 0 { |
| 412 | t.Fatalf("partial over-limit record was applied: records=%d messages=%d", replay.records, len(replay.msgs)) |
| 413 | } |
| 414 | if got, readErr := os.ReadFile(logPath); readErr != nil || string(got) != events { |
| 415 | t.Fatalf("event log changed after refusal: bytes=%q err=%v", got, readErr) |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | func TestReplayCollectionBudgetAggregatesAcrossRecords(t *testing.T) { |
| 420 | logPath := filepath.Join(t.TempDir(), "aggregate-collection-budget.events.jsonl") |
| 421 | replace := `{"schema_version":1,"type":"replace","messages":[{"role":"user","images":["one"]}]}` + "\n" |
| 422 | appendEvent := `{"schema_version":1,"type":"append","message_index":1,"messages":[{"role":"assistant","tool_calls":[{},{}]}]}` + "\n" |
| 423 | events := replace + appendEvent |
| 424 | if err := os.WriteFile(logPath, []byte(events), 0o600); err != nil { |
| 425 | t.Fatalf("write event log: %v", err) |
| 426 | } |
| 427 | |
| 428 | replay, err := replaySessionEventLogWithLimits(logPath, sessionReplayLimits{ |
| 429 | maxBytes: int64(len(events) + 1), maxRecords: 10, maxMessages: 10, maxCollectionItems: 2, |
| 430 | }) |
| 431 | if !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 432 | t.Fatalf("replay error = %v, want aggregate collection replay limit", err) |
| 433 | } |
| 434 | var limitErr *SessionReplayLimitError |
| 435 | if !errors.As(err, &limitErr) || limitErr.Resource != "message_collection_items" || limitErr.Value != 3 { |
| 436 | t.Fatalf("limit error = %#v, want third live collection item rejected", limitErr) |
| 437 | } |
| 438 | if replay.records != 1 || len(replay.msgs) != 1 || replay.collectionItems != 1 { |
| 439 | t.Fatalf("replay prefix = records:%d messages:%d collections:%d, want first record only", |
| 440 | replay.records, len(replay.msgs), replay.collectionItems) |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | func TestLoadSessionMessagesDoesNotFallbackAfterEventReplayBudget(t *testing.T) { |
| 445 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 446 | checkpoint := `{"role":"system","content":"older checkpoint"}` + "\n" |
| 447 | if err := os.WriteFile(path, []byte(checkpoint), 0o600); err != nil { |
| 448 | t.Fatalf("write checkpoint: %v", err) |
| 449 | } |
| 450 | logPath := store.SessionEventLog(path) |
| 451 | events := `{"schema_version":1,"type":"replace","messages":[{"role":"system","content":"newer event state"},{"role":"user","content":"must not disappear"}]}` + "\n" |
| 452 | if err := os.WriteFile(logPath, []byte(events), 0o600); err != nil { |
| 453 | t.Fatalf("write event log: %v", err) |
| 454 | } |
| 455 | |
| 456 | msgs, fromEvents, damaged, err := loadSessionMessagesWithLimits(path, sessionReplayLimits{ |
| 457 | maxBytes: int64(len(events) + 1), maxRecords: 10, maxMessages: 1, |
| 458 | }) |
| 459 | if !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 460 | t.Fatalf("load error = %v, want ErrSessionReplayLimitExceeded", err) |
| 461 | } |
| 462 | if msgs != nil || !fromEvents || damaged { |
| 463 | t.Fatalf("load result = msgs:%v fromEvents:%v damaged:%v, want hard event-log refusal", msgs, fromEvents, damaged) |
| 464 | } |
| 465 | if got, readErr := os.ReadFile(path); readErr != nil || string(got) != checkpoint { |
| 466 | t.Fatalf("checkpoint changed after refusal: bytes=%q err=%v", got, readErr) |
| 467 | } |
| 468 | if got, readErr := os.ReadFile(logPath); readErr != nil || string(got) != events { |
| 469 | t.Fatalf("event log changed after refusal: bytes=%q err=%v", got, readErr) |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | func TestProbeSessionEventLogReadsOnlyNativeHeader(t *testing.T) { |
| 474 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 475 | logPath := store.SessionEventLog(path) |
| 476 | largeRecord := `{"schema_version":1,"type":"replace","messages":[{"role":"user","content":"` + |
| 477 | strings.Repeat("x", int(sessionEventProbeMaxBytes*2)) + `"}]}` + "\n" |
| 478 | if err := os.WriteFile(logPath, []byte(largeRecord), 0o600); err != nil { |
| 479 | t.Fatalf("write event log: %v", err) |
| 480 | } |
| 481 | probe, err := probeSessionEventLogWithLimits(path, sessionReplayLimits{ |
| 482 | maxBytes: 128, maxRecords: 10, maxMessages: 10, |
| 483 | }) |
| 484 | if err != nil { |
| 485 | t.Fatalf("probe: %v", err) |
| 486 | } |
| 487 | if !probe.native || probe.size != int64(len(largeRecord)) { |
| 488 | t.Fatalf("probe = %+v, want native size %d", probe, len(largeRecord)) |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | func TestLoadSessionMessagesAcceptsReorderedEventHeader(t *testing.T) { |
| 493 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 494 | checkpoint := `{"role":"system","content":"older checkpoint"}` + "\n" |
| 495 | if err := os.WriteFile(path, []byte(checkpoint), 0o600); err != nil { |
| 496 | t.Fatalf("write checkpoint: %v", err) |
| 497 | } |
| 498 | content := "newer event state " + strings.Repeat("x", int(sessionEventProbeMaxBytes*2)) |
| 499 | // schema_version deliberately follows a messages payload larger than the |
| 500 | // prefix probe. Valid in-budget JSON must remain field-order independent. |
| 501 | events := `{"type":"replace","messages":[{"role":"system","content":"sys"},{"role":"user","content":"` + |
| 502 | content + `"}],"schema_version":1}` + "\n" |
| 503 | if err := os.WriteFile(store.SessionEventLog(path), []byte(events), 0o600); err != nil { |
| 504 | t.Fatalf("write reordered event log: %v", err) |
| 505 | } |
| 506 | |
| 507 | msgs, fromEvents, damaged, err := loadSessionMessages(path) |
| 508 | if err != nil { |
| 509 | t.Fatalf("load reordered event log: %v", err) |
| 510 | } |
| 511 | if !fromEvents || damaged { |
| 512 | t.Fatalf("load result fromEvents=%v damaged=%v, want clean native replay", fromEvents, damaged) |
| 513 | } |
| 514 | if len(msgs) != 2 || msgs[1].Content != content { |
| 515 | t.Fatalf("loaded messages = %d, want reordered event state", len(msgs)) |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | func TestForceSaveDoesNotBootstrapEventLog(t *testing.T) { |
| 520 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 521 | s := NewSession("sys") |
| 522 | s.Add(provider.Message{Role: provider.RoleUser, Content: "one-shot"}) |
| 523 | if err := s.Save(path); err != nil { |
| 524 | t.Fatalf("Save: %v", err) |
| 525 | } |
| 526 | if _, err := os.Stat(store.SessionEventLog(path)); !os.IsNotExist(err) { |
| 527 | t.Fatalf("force save created an event log (err=%v); one-shot copies must stay single-file", err) |
| 528 | } |
| 529 | if _, err := os.Stat(store.SessionEventIndex(path)); !os.IsNotExist(err) { |
| 530 | t.Fatalf("force save created an event index (err=%v)", err) |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | func TestForceSaveCompactsExistingEventLog(t *testing.T) { |
| 535 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 536 | sessionWithTurns(t, path, 3) |
| 537 | |
| 538 | forced := NewSession("sys") |
| 539 | forced.Add(provider.Message{Role: provider.RoleUser, Content: "forced state"}) |
| 540 | if err := forced.Save(path); err != nil { |
| 541 | t.Fatalf("force Save: %v", err) |
| 542 | } |
| 543 | events := readSessionEventsForTest(t, path) |
| 544 | if len(events) != 1 || events[0].Type != sessionEventTypeReplace { |
| 545 | t.Fatalf("events after force save = %+v, want single replace", events) |
| 546 | } |
| 547 | loaded, err := LoadSession(path) |
| 548 | if err != nil { |
| 549 | t.Fatalf("LoadSession: %v", err) |
| 550 | } |
| 551 | if len(loaded.Messages) != 2 || loaded.Messages[1].Content != "forced state" { |
| 552 | t.Fatalf("loaded after force save = %+v, want forced transcript", loaded.Messages) |
| 553 | } |
| 554 | anchor, err := loadSessionMessagesFromJSONL(path) |
| 555 | if err != nil { |
| 556 | t.Fatalf("read anchor: %v", err) |
| 557 | } |
| 558 | if len(anchor) != 2 || anchor[1].Content != "forced state" { |
| 559 | t.Fatalf("anchor after force save = %+v, want refreshed", anchor) |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | func TestEventLogCompactionBoundsGrowth(t *testing.T) { |
| 564 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 565 | s := NewSession("sys") |
| 566 | filler := strings.Repeat("y", 8<<10) |
| 567 | // Repeated rewrites (each a full replace event) must not grow the log |
| 568 | // without bound: once past the threshold the log folds to one event. |
| 569 | for i := 0; i < 60; i++ { |
| 570 | s.Replace([]provider.Message{ |
| 571 | {Role: provider.RoleSystem, Content: "sys"}, |
| 572 | {Role: provider.RoleUser, Content: filler}, |
| 573 | {Role: provider.RoleAssistant, Content: strings.Repeat("z", i+1)}, |
| 574 | }) |
| 575 | if err := s.SaveRewrite(path); err != nil { |
| 576 | t.Fatalf("SaveRewrite %d: %v", i, err) |
| 577 | } |
| 578 | } |
| 579 | _, contentBytes, err := digestAndSizeSessionMessages(s.Snapshot()) |
| 580 | if err != nil { |
| 581 | t.Fatalf("digest: %v", err) |
| 582 | } |
| 583 | logSize := sessionEventLogSize(path) |
| 584 | limit := sessionEventLogCompactFloor |
| 585 | if scaled := contentBytes * sessionEventLogCompactFactor; scaled > limit { |
| 586 | limit = scaled |
| 587 | } |
| 588 | // One post-compaction replace event of slack is allowed. |
| 589 | if logSize > limit+contentBytes+4096 { |
| 590 | t.Fatalf("event log grew unbounded: size=%d limit=%d content=%d", logSize, limit, contentBytes) |
| 591 | } |
| 592 | loaded, err := LoadSession(path) |
| 593 | if err != nil { |
| 594 | t.Fatalf("LoadSession after compaction churn: %v", err) |
| 595 | } |
| 596 | if got := loaded.Messages[len(loaded.Messages)-1].Content; got != strings.Repeat("z", 60) { |
| 597 | t.Fatalf("compacted transcript tail wrong: %q", got[:min(8, len(got))]) |
| 598 | } |
| 599 | anchor, err := loadSessionMessagesFromJSONL(path) |
| 600 | if err != nil { |
| 601 | t.Fatalf("read anchor: %v", err) |
| 602 | } |
| 603 | if got := anchor[len(anchor)-1].Content; got != strings.Repeat("z", 60) { |
| 604 | t.Fatal("anchor not refreshed by checkpoint compaction") |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | func TestConcurrentLoadDuringAppendsStaysConsistent(t *testing.T) { |
| 609 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 610 | s := NewSession("sys") |
| 611 | s.Add(provider.Message{Role: provider.RoleUser, Content: "seed"}) |
| 612 | if err := s.SaveSnapshot(path); err != nil { |
| 613 | t.Fatalf("seed SaveSnapshot: %v", err) |
| 614 | } |
| 615 | |
| 616 | stop := make(chan struct{}) |
| 617 | var wg sync.WaitGroup |
| 618 | wg.Add(1) |
| 619 | errCh := make(chan error, 1) |
| 620 | go func() { |
| 621 | defer wg.Done() |
| 622 | for { |
| 623 | select { |
| 624 | case <-stop: |
| 625 | return |
| 626 | default: |
| 627 | } |
| 628 | loaded, err := LoadSession(path) |
| 629 | if err != nil { |
| 630 | select { |
| 631 | case errCh <- err: |
| 632 | default: |
| 633 | } |
| 634 | return |
| 635 | } |
| 636 | if loaded.eventLogDamaged { |
| 637 | select { |
| 638 | case errCh <- os.ErrInvalid: |
| 639 | default: |
| 640 | } |
| 641 | return |
| 642 | } |
| 643 | } |
| 644 | }() |
| 645 | for i := 0; i < 40; i++ { |
| 646 | s.Add(provider.Message{Role: provider.RoleAssistant, Content: strings.Repeat("a", 512)}) |
| 647 | if err := s.SaveSnapshot(path); err != nil { |
| 648 | t.Fatalf("SaveSnapshot %d: %v", i, err) |
| 649 | } |
| 650 | } |
| 651 | close(stop) |
| 652 | wg.Wait() |
| 653 | select { |
| 654 | case err := <-errCh: |
| 655 | t.Fatalf("concurrent LoadSession failed or saw damage: %v", err) |
| 656 | default: |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | func TestSessionsShareContentSeesEventLogDivergence(t *testing.T) { |
| 661 | dir := t.TempDir() |
| 662 | pathA := filepath.Join(dir, "a.jsonl") |
| 663 | pathB := filepath.Join(dir, "b.jsonl") |
| 664 | a := sessionWithTurns(t, pathA, 1) |
| 665 | _ = sessionWithTurns(t, pathB, 1) |
| 666 | |
| 667 | same, err := SessionsShareContent(pathA, pathB) |
| 668 | if err != nil { |
| 669 | t.Fatalf("SessionsShareContent: %v", err) |
| 670 | } |
| 671 | if !same { |
| 672 | t.Fatal("identical transcripts reported as different") |
| 673 | } |
| 674 | |
| 675 | // Grow A through the event log only — the .jsonl checkpoints stay |
| 676 | // byte-identical, which is exactly the trap byte comparison fell into. |
| 677 | a.Add(provider.Message{Role: provider.RoleUser, Content: "diverged"}) |
| 678 | if err := a.SaveSnapshot(pathA); err != nil { |
| 679 | t.Fatalf("SaveSnapshot diverge: %v", err) |
| 680 | } |
| 681 | anchorA, _ := os.ReadFile(pathA) |
| 682 | anchorB, _ := os.ReadFile(pathB) |
| 683 | if string(anchorA) != string(anchorB) { |
| 684 | t.Skip("checkpoints diverged on disk; byte-compare trap not reproducible here") |
| 685 | } |
| 686 | same, err = SessionsShareContent(pathA, pathB) |
| 687 | if err != nil { |
| 688 | t.Fatalf("SessionsShareContent after divergence: %v", err) |
| 689 | } |
| 690 | if same { |
| 691 | t.Fatal("diverged transcripts reported as identical") |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | func TestLoadSessionUserMessagesSeesEventLogTurns(t *testing.T) { |
| 696 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 697 | s := NewSession("sys") |
| 698 | s.Add(provider.Message{Role: provider.RoleUser, Content: "first prompt"}) |
| 699 | if err := s.SaveSnapshot(path); err != nil { |
| 700 | t.Fatalf("SaveSnapshot: %v", err) |
| 701 | } |
| 702 | s.Add(provider.Message{Role: provider.RoleAssistant, Content: "reply"}) |
| 703 | s.Add(provider.Message{Role: provider.RoleUser, Content: "second prompt"}) |
| 704 | if err := s.SaveSnapshot(path); err != nil { |
| 705 | t.Fatalf("SaveSnapshot append: %v", err) |
| 706 | } |
| 707 | |
| 708 | users, err := LoadSessionUserMessages(path) |
| 709 | if err != nil { |
| 710 | t.Fatalf("LoadSessionUserMessages: %v", err) |
| 711 | } |
| 712 | if len(users) != 2 || users[0].Text != "first prompt" || users[1].Text != "second prompt" { |
| 713 | t.Fatalf("user messages = %+v, want both prompts", users) |
| 714 | } |
| 715 | if users[1].At.IsZero() { |
| 716 | t.Fatal("appended prompt lost its event timestamp") |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | func TestLoadSessionUserMessagesDoesNotFallbackAfterEventReplayBudget(t *testing.T) { |
| 721 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 722 | checkpoint := `{"role":"user","content":"older checkpoint prompt"}` + "\n" |
| 723 | if err := os.WriteFile(path, []byte(checkpoint), 0o600); err != nil { |
| 724 | t.Fatalf("write checkpoint: %v", err) |
| 725 | } |
| 726 | logPath := store.SessionEventLog(path) |
| 727 | events := `{"schema_version":1,"type":"replace","messages":[{"role":"user","content":"newer prompt"},{"role":"assistant","content":"reply"}]}` + "\n" |
| 728 | if err := os.WriteFile(logPath, []byte(events), 0o600); err != nil { |
| 729 | t.Fatalf("write event log: %v", err) |
| 730 | } |
| 731 | |
| 732 | users, err := loadSessionUserMessagesWithLimits(path, sessionReplayLimits{ |
| 733 | maxBytes: int64(len(events) + 1), maxRecords: 10, maxMessages: 1, maxCollectionItems: 10, |
| 734 | }) |
| 735 | if !errors.Is(err, ErrSessionReplayLimitExceeded) { |
| 736 | t.Fatalf("load error = %v, want ErrSessionReplayLimitExceeded", err) |
| 737 | } |
| 738 | if users != nil { |
| 739 | t.Fatalf("user messages = %+v, want no stale checkpoint fallback", users) |
| 740 | } |
| 741 | if got, readErr := os.ReadFile(path); readErr != nil || string(got) != checkpoint { |
| 742 | t.Fatalf("checkpoint changed after refusal: bytes=%q err=%v", got, readErr) |
| 743 | } |
| 744 | if got, readErr := os.ReadFile(logPath); readErr != nil || string(got) != events { |
| 745 | t.Fatalf("event log changed after refusal: bytes=%q err=%v", got, readErr) |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | func TestLoadSessionUserMessagesDoesNotFallbackFromFutureEventSchema(t *testing.T) { |
| 750 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 751 | checkpoint := `{"role":"user","content":"older checkpoint prompt"}` + "\n" |
| 752 | if err := os.WriteFile(path, []byte(checkpoint), 0o600); err != nil { |
| 753 | t.Fatalf("write checkpoint: %v", err) |
| 754 | } |
| 755 | events := `{"schema_version":99,"type":"replace","messages":[{"role":"user","content":"future prompt"}]}` + "\n" |
| 756 | if err := os.WriteFile(store.SessionEventLog(path), []byte(events), 0o600); err != nil { |
| 757 | t.Fatalf("write event log: %v", err) |
| 758 | } |
| 759 | |
| 760 | users, err := LoadSessionUserMessages(path) |
| 761 | if err == nil || !strings.Contains(err.Error(), "uses schema 99") { |
| 762 | t.Fatalf("load error = %v, want future-schema refusal", err) |
| 763 | } |
| 764 | if users != nil { |
| 765 | t.Fatalf("user messages = %+v, want no stale checkpoint fallback", users) |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | func TestSessionEventLogPreservesUserCreatedAt(t *testing.T) { |
| 770 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 771 | want := time.Date(2026, 7, 16, 8, 30, 0, 0, time.UTC).UnixMilli() |
| 772 | s := NewSession("sys") |
| 773 | s.Add(provider.Message{Role: provider.RoleUser, Content: "timed prompt", CreatedAt: want}) |
| 774 | if err := s.SaveSnapshot(path); err != nil { |
| 775 | t.Fatalf("SaveSnapshot: %v", err) |
| 776 | } |
| 777 | |
| 778 | loaded, err := LoadSession(path) |
| 779 | if err != nil { |
| 780 | t.Fatalf("LoadSession: %v", err) |
| 781 | } |
| 782 | msgs := loaded.Snapshot() |
| 783 | if len(msgs) != 2 || msgs[1].CreatedAt != want { |
| 784 | t.Fatalf("loaded messages = %+v, want user createdAt %d", msgs, want) |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | func TestSessionDigestIgnoresUserCreatedAt(t *testing.T) { |
| 789 | withoutTime := []provider.Message{ |
| 790 | {Role: provider.RoleSystem, Content: "sys"}, |
| 791 | {Role: provider.RoleUser, Content: "prompt"}, |
| 792 | } |
| 793 | withTime := append([]provider.Message(nil), withoutTime...) |
| 794 | withTime[1].CreatedAt = 1_718_000_000_000 |
| 795 | |
| 796 | withoutDigest, withoutSize, err := digestAndSizeSessionMessages(withoutTime) |
| 797 | if err != nil { |
| 798 | t.Fatalf("digest without createdAt: %v", err) |
| 799 | } |
| 800 | withDigest, withSize, err := digestAndSizeSessionMessages(withTime) |
| 801 | if err != nil { |
| 802 | t.Fatalf("digest with createdAt: %v", err) |
| 803 | } |
| 804 | if withoutDigest != withDigest || withoutSize != withSize { |
| 805 | t.Fatalf("local createdAt changed transcript identity: digestEqual=%v size=%d/%d", withoutDigest == withDigest, withoutSize, withSize) |
| 806 | } |
| 807 | if !messagesHavePrefix(withTime, withoutTime) || !messagesHavePrefix(withoutTime, withTime) { |
| 808 | t.Fatal("local createdAt broke cross-version transcript prefix matching") |
| 809 | } |
| 810 | if depth := messagesPrefixDigestDepth(withTime, withoutDigest); depth != len(withTime) { |
| 811 | t.Fatalf("createdAt-aware prefix digest depth = %d, want %d", depth, len(withTime)) |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | func TestSessionContentModTimeTracksEventLog(t *testing.T) { |
| 816 | path := filepath.Join(t.TempDir(), "session.jsonl") |
| 817 | s := sessionWithTurns(t, path, 1) |
| 818 | old := time.Now().Add(-24 * time.Hour) |
| 819 | if err := os.Chtimes(path, old, old); err != nil { |
| 820 | t.Fatalf("age anchor: %v", err) |
| 821 | } |
| 822 | s.Add(provider.Message{Role: provider.RoleUser, Content: "new"}) |
| 823 | if err := s.SaveSnapshot(path); err != nil { |
| 824 | t.Fatalf("SaveSnapshot: %v", err) |
| 825 | } |
| 826 | anchorInfo, err := os.Stat(path) |
| 827 | if err != nil { |
| 828 | t.Fatalf("stat anchor: %v", err) |
| 829 | } |
| 830 | if got := SessionContentModTime(path); !got.After(anchorInfo.ModTime()) { |
| 831 | t.Fatalf("SessionContentModTime = %v, want newer than stale anchor %v", got, anchorInfo.ModTime()) |
| 832 | } |
| 833 | } |
| 834 |