Files
oh-my-pi/packages/coding-agent/test/compaction.test.ts
T
can1357 e13f2de58a fix(coding-agent): mapped auxiliary messages to developer role for compaction
- Updated `convertToLlm` logic to emit `developer` role for custom, hook, and file-mention inputs.
- Simplified OpenAI compact output filtering to retain only `user` and `assistant` messages, removing legacy `system-reminder` pattern checks.
- Adjusted compaction and session tests to match the new developer-role mapping and expected compacted content.
2026-06-08 05:19:57 +02:00

917 lines
32 KiB
TypeScript

import { afterEach, beforeEach, describe, expect, it, vi } from "bun:test";
import * as path from "node:path";
import type { AgentMessage } from "@oh-my-pi/pi-agent-core";
import {
type CompactionSettings,
calculateContextTokens,
compact,
DEFAULT_COMPACTION_SETTINGS,
findCutPoint,
getLastAssistantUsage,
prepareCompaction,
shouldCompact,
} from "@oh-my-pi/pi-agent-core/compaction/compaction";
import * as ai from "@oh-my-pi/pi-ai";
import { getBundledModel } from "@oh-my-pi/pi-ai/models";
import { encodeTextSignatureV1 } from "@oh-my-pi/pi-ai/providers/openai-responses-shared";
import type { AssistantMessage, Model, ProviderPayload, Usage } from "@oh-my-pi/pi-ai/types";
import { hookFetch } from "@oh-my-pi/pi-utils";
import {
buildSessionContext,
type CompactionEntry,
type ModelChangeEntry,
migrateSessionEntries,
parseSessionEntries,
type SessionEntry,
type SessionMessageEntry,
type ThinkingLevelChangeEntry,
} from "../src/session/session-manager";
import { e2eApiKey } from "./utilities";
// ============================================================================
// Test fixtures
// ============================================================================
async function loadLargeSessionEntries(): Promise<SessionEntry[]> {
const sessionPath = path.join(import.meta.dirname, "fixtures/large-session.jsonl");
const content = await Bun.file(sessionPath).text();
const entries = parseSessionEntries(content);
migrateSessionEntries(entries); // Add id/parentId for v1 fixtures
return entries.filter((e): e is SessionEntry => e.type !== "session");
}
function createMockUsage(input: number, output: number, cacheRead = 0, cacheWrite = 0): Usage {
return {
input,
output,
cacheRead,
cacheWrite,
totalTokens: input + output + cacheRead + cacheWrite,
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
};
}
function createUserMessage(text: string): AgentMessage {
return { role: "user", content: text, timestamp: Date.now() };
}
function createAssistantMessage(text: string, usage?: Usage): AssistantMessage {
return {
role: "assistant",
content: [{ type: "text", text }],
usage: usage || createMockUsage(100, 50),
stopReason: "stop",
timestamp: Date.now(),
api: "anthropic-messages",
provider: "anthropic",
model: "claude-sonnet-4-5",
};
}
function createOpenAiAssistantMessage(
text: string,
model: Model,
usage?: Usage,
encryptedReasoning: string = "encrypted-reasoning",
providerPayload?: ProviderPayload,
): AssistantMessage {
return {
role: "assistant",
content: [
{
type: "thinking",
thinking: "Reasoning summary",
thinkingSignature: JSON.stringify({
type: "reasoning",
encrypted_content: encryptedReasoning,
summary: [{ type: "summary_text", text: "Reasoning summary" }],
}),
},
{ type: "text", text },
],
usage: usage || createMockUsage(100, 50),
stopReason: "stop",
providerPayload,
timestamp: Date.now(),
api: model.api,
provider: model.provider,
model: model.id,
};
}
let entryCounter = 0;
let lastId: string | null = null;
function resetEntryCounter() {
entryCounter = 0;
lastId = null;
}
// Reset counter before each test to get predictable IDs
beforeEach(() => {
resetEntryCounter();
});
afterEach(() => {
vi.restoreAllMocks();
});
function createMessageEntry(message: AgentMessage): SessionMessageEntry {
const id = `test-id-${entryCounter++}`;
const entry: SessionMessageEntry = {
type: "message",
id,
parentId: lastId,
timestamp: new Date().toISOString(),
message,
};
lastId = id;
return entry;
}
function createCompactionEntry(summary: string, firstKeptEntryId: string): CompactionEntry {
const id = `test-id-${entryCounter++}`;
const entry: CompactionEntry = {
type: "compaction",
id,
parentId: lastId,
timestamp: new Date().toISOString(),
summary,
firstKeptEntryId,
tokensBefore: 10000,
};
lastId = id;
return entry;
}
function createModelChangeEntry(provider: string, modelId: string): ModelChangeEntry {
const id = `test-id-${entryCounter++}`;
const entry: ModelChangeEntry = {
type: "model_change",
id,
parentId: lastId,
timestamp: new Date().toISOString(),
model: `${provider}/${modelId}`,
};
lastId = id;
return entry;
}
function createThinkingLevelEntry(thinkingLevel: string): ThinkingLevelChangeEntry {
const id = `test-id-${entryCounter++}`;
const entry: ThinkingLevelChangeEntry = {
type: "thinking_level_change",
id,
parentId: lastId,
timestamp: new Date().toISOString(),
thinkingLevel,
};
lastId = id;
return entry;
}
// ============================================================================
// Unit tests
// ============================================================================
describe("Token calculation", () => {
it("should calculate total context tokens from usage", () => {
const usage = createMockUsage(1000, 500, 200, 100);
expect(calculateContextTokens(usage)).toBe(1800);
});
it("should handle zero values", () => {
const usage = createMockUsage(0, 0, 0, 0);
expect(calculateContextTokens(usage)).toBe(0);
});
});
describe("getLastAssistantUsage", () => {
it("should find the last non-aborted assistant message usage", () => {
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Hello")),
createMessageEntry(createAssistantMessage("Hi", createMockUsage(100, 50))),
createMessageEntry(createUserMessage("How are you?")),
createMessageEntry(createAssistantMessage("Good", createMockUsage(200, 100))),
];
const usage = getLastAssistantUsage(entries);
expect(usage).not.toBeNull();
expect(usage!.input).toBe(200);
});
it("should skip aborted messages", () => {
const abortedMsg: AssistantMessage = {
...createAssistantMessage("Aborted", createMockUsage(300, 150)),
stopReason: "aborted",
};
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Hello")),
createMessageEntry(createAssistantMessage("Hi", createMockUsage(100, 50))),
createMessageEntry(createUserMessage("How are you?")),
createMessageEntry(abortedMsg),
];
const usage = getLastAssistantUsage(entries);
expect(usage).not.toBeNull();
expect(usage!.input).toBe(100);
});
it("should return undefined if no assistant messages", () => {
const entries: SessionEntry[] = [createMessageEntry(createUserMessage("Hello"))];
expect(getLastAssistantUsage(entries)).toBeUndefined();
});
});
describe("shouldCompact", () => {
it("should return true when context exceeds threshold", () => {
const settings: CompactionSettings = {
enabled: true,
reserveTokens: 10000,
keepRecentTokens: 20000,
};
// default mode uses legacy reserve behavior:
// effective reserve = max(floor(100000 * 0.15), 10000) = 15000, threshold = 85000
expect(shouldCompact(95000, 100000, settings)).toBe(true);
expect(shouldCompact(86000, 100000, settings)).toBe(true);
expect(shouldCompact(84000, 100000, settings)).toBe(false);
});
it("should use configured threshold percent", () => {
const settings: CompactionSettings = {
enabled: true,
thresholdPercent: 90,
reserveTokens: 10000,
keepRecentTokens: 20000,
};
expect(shouldCompact(89_000, 100_000, settings)).toBe(false);
expect(shouldCompact(90_001, 100_000, settings)).toBe(true);
});
it("should use legacy reserve behavior when threshold is set to default sentinel", () => {
const settings: CompactionSettings = {
enabled: true,
thresholdPercent: -1,
reserveTokens: 30_000,
keepRecentTokens: 20_000,
};
// effective reserve = max(15000, 30000) = 30000, threshold = 70000
expect(shouldCompact(70_000, 100_000, settings)).toBe(false);
expect(shouldCompact(70_001, 100_000, settings)).toBe(true);
});
it("should return false when strategy is off", () => {
const settings: CompactionSettings = {
enabled: true,
strategy: "off",
thresholdPercent: 1,
reserveTokens: 10000,
keepRecentTokens: 20000,
};
expect(shouldCompact(99_000, 100_000, settings)).toBe(false);
});
it("should return false when disabled", () => {
const settings: CompactionSettings = {
enabled: false,
reserveTokens: 10000,
keepRecentTokens: 20000,
};
expect(shouldCompact(95000, 100000, settings)).toBe(false);
});
});
describe("remote compaction setting", () => {
it("forwards an explicit initiator override to local summarization requests", async () => {
const model = getBundledModel("anthropic", "claude-sonnet-4-5");
if (!model) throw new Error("Expected anthropic/claude-sonnet-4-5 model to exist");
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createAssistantMessage("Answer 1", createMockUsage(0, 100, 2000, 0))),
createMessageEntry(createUserMessage("Turn 2")),
createMessageEntry(createAssistantMessage("Answer 2", createMockUsage(0, 100, 5000, 0))),
createMessageEntry(createUserMessage("Turn 3")),
createMessageEntry(createAssistantMessage("Answer 3", createMockUsage(0, 100, 9000, 0))),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1000,
remoteEnabled: false,
});
if (!preparation) throw new Error("Expected compaction preparation");
const completeSimpleSpy = vi.spyOn(ai, "completeSimple");
completeSimpleSpy
.mockResolvedValueOnce(createAssistantMessage("History summary"))
.mockResolvedValueOnce(createAssistantMessage("Turn prefix summary"))
.mockResolvedValueOnce(createAssistantMessage("Short summary"));
await compact(preparation, model, "test-api-key", undefined, undefined, {
initiatorOverride: "agent",
});
expect(completeSimpleSpy).toHaveBeenCalledTimes(3);
for (const call of completeSimpleSpy.mock.calls) {
const options = call[2] as { initiatorOverride?: string } | undefined;
expect(options?.initiatorOverride).toBe("agent");
}
});
it("uses local summarization when remote compaction is disabled", async () => {
const model = getBundledModel("openai", "gpt-4o");
if (!model) {
throw new Error("Expected openai/gpt-4o model to exist");
}
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createAssistantMessage("Answer 1", createMockUsage(0, 100, 2000, 0))),
createMessageEntry(createUserMessage("Turn 2")),
createMessageEntry(createAssistantMessage("Answer 2", createMockUsage(0, 100, 5000, 0))),
createMessageEntry(createUserMessage("Turn 3")),
createMessageEntry(createAssistantMessage("Answer 3", createMockUsage(0, 100, 9000, 0))),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1000,
remoteEnabled: false,
remoteEndpoint: "https://compaction.example.test/summarize",
});
expect(preparation).toBeDefined();
if (!preparation) {
throw new Error("Expected compaction preparation");
}
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ summary: "remote summary" }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
const completeSpy = vi
.spyOn(ai, "completeSimple")
.mockResolvedValueOnce(createAssistantMessage("Local history summary"))
.mockResolvedValueOnce(createAssistantMessage("Local turn summary"))
.mockResolvedValueOnce(createAssistantMessage("Local short summary"));
const result = await compact(preparation, model, "test-api-key");
expect(fetchSpy).not.toHaveBeenCalled();
expect(completeSpy).toHaveBeenCalledTimes(3);
expect(result.summary).toContain("Local history summary");
expect(result.shortSummary).toBe("Local short summary");
});
it("preserves prior compaction items and encrypted reasoning for OpenAI remote compaction", async () => {
const model = getBundledModel("openai", "gpt-5.1");
if (!model) {
throw new Error("Expected openai/gpt-5.1 model to exist");
}
const oldUser = createMessageEntry(createUserMessage("Older turn"));
const oldAssistant = createMessageEntry(createAssistantMessage("Older answer"));
const previousCompaction = createCompactionEntry("Previous summary", oldAssistant.id);
previousCompaction.preserveData = {
openaiRemoteCompaction: {
provider: "openai",
replacementHistory: [
{ type: "message", role: "user", content: [{ type: "input_text", text: "Previous preserved user" }] },
{ type: "compaction", encrypted_content: "prior_encrypted" },
],
compactionItem: { type: "compaction", encrypted_content: "prior_encrypted" },
},
};
const entries: SessionEntry[] = [
oldUser,
oldAssistant,
previousCompaction,
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(
createOpenAiAssistantMessage(
"Answer 1",
model,
createMockUsage(0, 100, 4000, 0),
"encrypted_reasoning_turn_1",
),
),
createMessageEntry(createUserMessage("Turn 2")),
createMessageEntry(
createOpenAiAssistantMessage(
"Answer 2",
model,
createMockUsage(0, 100, 9000, 0),
"encrypted_reasoning_turn_2",
),
),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1000,
remoteEnabled: true,
});
expect(preparation).toBeDefined();
if (!preparation) {
throw new Error("Expected compaction preparation");
}
const remoteOutput = [
{ type: "message", role: "user", content: [{ type: "input_text", text: "Compacted retained user" }] },
{ type: "compaction", encrypted_content: "new_encrypted" },
];
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ output: remoteOutput }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
const completeSimpleSpy = vi.spyOn(ai, "completeSimple");
completeSimpleSpy
.mockResolvedValueOnce(createAssistantMessage("History summary"))
.mockResolvedValueOnce(createAssistantMessage("Turn prefix summary"))
.mockResolvedValueOnce(createAssistantMessage("Short summary"));
const result = await compact(preparation, model, "test-api-key");
const requestBody = JSON.parse(String(fetchSpy.mock.calls[0]?.[1]?.body)) as {
input: Array<Record<string, unknown>>;
};
expect(fetchSpy).toHaveBeenCalledTimes(1);
expect(requestBody.input[0]).toEqual({
type: "message",
role: "user",
content: [{ type: "input_text", text: "Previous preserved user" }],
});
expect(requestBody.input[1]).toEqual({ type: "compaction", encrypted_content: "prior_encrypted" });
expect(
requestBody.input.some(
item => item.type === "reasoning" && item.encrypted_content === "encrypted_reasoning_turn_1",
),
).toBe(true);
expect(result.summary).toContain("History summary");
expect(result.preserveData).toEqual({
openaiRemoteCompaction: {
provider: "openai",
replacementHistory: remoteOutput,
compactionItem: { type: "compaction", encrypted_content: "new_encrypted" },
},
});
});
it("prefers persisted assistant native history snapshots for OpenAI remote compaction", async () => {
const model = getBundledModel("openai", "gpt-5.1");
if (!model) throw new Error("Expected openai/gpt-5.1 model to exist");
const assistantHistory = [
{ type: "message", role: "user", content: [{ type: "input_text", text: "Canonical user" }] },
{ type: "message", role: "assistant", content: [{ type: "output_text", text: "Canonical assistant" }] },
];
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("generic user that should be replaced")),
createMessageEntry(
createOpenAiAssistantMessage(
"generic assistant that should be replaced",
model,
createMockUsage(0, 100, 9000, 0),
"encrypted_reasoning_turn_1",
{ type: "openaiResponsesHistory", provider: "openai", items: assistantHistory },
),
),
createMessageEntry(createUserMessage("follow-up user")),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1,
remoteEnabled: true,
});
if (!preparation) throw new Error("Expected compaction preparation");
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ output: [{ type: "compaction", encrypted_content: "new_encrypted" }] }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
vi.spyOn(ai, "completeSimple").mockResolvedValue(createAssistantMessage("Short summary"));
await compact(preparation, model, "test-api-key");
const requestBody = JSON.parse(String(fetchSpy.mock.calls[0]?.[1]?.body)) as {
input: Array<Record<string, unknown>>;
};
expect(requestBody.input).toEqual([
...assistantHistory,
{ type: "message", role: "user", content: [{ type: "input_text", text: "follow-up user" }] },
]);
});
it("uses the ChatGPT Codex compact endpoint for openai-codex models", async () => {
const baseModel = getBundledModel("openai", "gpt-5.1");
if (!baseModel) throw new Error("Expected openai/gpt-5.1 model to exist");
const model: Model = {
...baseModel,
api: "openai-codex-responses",
provider: "openai-codex",
baseUrl: "https://chatgpt.com/backend-api",
};
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createOpenAiAssistantMessage("Answer 1", model, createMockUsage(0, 100, 9000, 0))),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1,
remoteEnabled: true,
});
if (!preparation) throw new Error("Expected compaction preparation");
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ output: [{ type: "compaction", encrypted_content: "new_encrypted" }] }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
vi.spyOn(ai, "completeSimple").mockResolvedValue(createAssistantMessage("Short summary"));
await compact(preparation, model, "test-api-key");
expect(fetchSpy).toHaveBeenCalledTimes(1);
expect(fetchSpy.mock.calls[0]?.[0]).toBe("https://chatgpt.com/backend-api/codex/responses/compact");
});
it("preserves codex assistant text signature metadata in remote compaction history", async () => {
const baseModel = getBundledModel("openai", "gpt-5.1");
if (!baseModel) throw new Error("Expected openai/gpt-5.1 model to exist");
const model: Model = {
...baseModel,
api: "openai-codex-responses",
provider: "openai-codex",
baseUrl: "https://chatgpt.com/backend-api",
};
const assistant: AssistantMessage = {
role: "assistant",
content: [
{
type: "text",
text: "Answer 1",
textSignature: encodeTextSignatureV1("msg_original", "commentary"),
},
],
usage: createMockUsage(0, 100, 9000, 0),
stopReason: "stop",
timestamp: Date.now(),
api: model.api,
provider: model.provider,
model: model.id,
};
const entries: SessionEntry[] = [createMessageEntry(createUserMessage("Turn 1")), createMessageEntry(assistant)];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1,
remoteEnabled: true,
});
if (!preparation) throw new Error("Expected compaction preparation");
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ output: [{ type: "compaction", encrypted_content: "new_encrypted" }] }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
vi.spyOn(ai, "completeSimple").mockResolvedValue(createAssistantMessage("Short summary"));
await compact(preparation, model, "test-api-key");
const requestBody = JSON.parse(String(fetchSpy.mock.calls[0]?.[1]?.body)) as {
input: Array<Record<string, unknown>>;
};
const assistantItem = requestBody.input.find(item => item.type === "message" && item.role === "assistant");
expect(assistantItem).toMatchObject({
type: "message",
role: "assistant",
id: "msg_original",
phase: "commentary",
});
});
it("filters remote compact output and uses explicit remote instructions", async () => {
const model = getBundledModel("openai", "gpt-5.1");
if (!model) throw new Error("Expected openai/gpt-5.1 model to exist");
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createOpenAiAssistantMessage("Answer 1", model, createMockUsage(0, 100, 9000, 0))),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1,
remoteEnabled: true,
});
if (!preparation) throw new Error("Expected compaction preparation");
const remoteOutput = [
{ type: "message", role: "developer", content: [{ type: "input_text", text: "stale developer" }] },
{ type: "message", role: "user", content: [{ type: "input_text", text: "Real preserved user" }] },
{ type: "reasoning", encrypted_content: "secret" },
{ type: "function_call_output", call_id: "call_1", output: "ignored" },
{ type: "message", role: "assistant", content: [{ type: "output_text", text: "Kept assistant" }] },
{ type: "compaction", encrypted_content: "new_encrypted" },
];
const fetchSpy = vi.fn(
(_input, _init, _next) =>
new Response(JSON.stringify({ output: remoteOutput }), {
status: 200,
headers: { "Content-Type": "application/json" },
}),
);
using _hook = hookFetch(fetchSpy);
vi.spyOn(ai, "completeSimple").mockResolvedValue(createAssistantMessage("Short summary"));
const result = await compact(preparation, model, "test-api-key", undefined, undefined, {
remoteInstructions: "BASE INSTRUCTIONS",
});
const requestBody = JSON.parse(String(fetchSpy.mock.calls[0]?.[1]?.body)) as {
instructions: string;
};
expect(requestBody.instructions).toBe("BASE INSTRUCTIONS");
expect(result.preserveData).toEqual({
openaiRemoteCompaction: {
provider: "openai",
replacementHistory: [
{ type: "message", role: "user", content: [{ type: "input_text", text: "Real preserved user" }] },
{ type: "message", role: "assistant", content: [{ type: "output_text", text: "Kept assistant" }] },
{ type: "compaction", encrypted_content: "new_encrypted" },
],
compactionItem: { type: "compaction", encrypted_content: "new_encrypted" },
},
});
});
it("clears stale OpenAI remote preserve data when local compaction runs", async () => {
const model = getBundledModel("anthropic", "claude-sonnet-4-5");
if (!model) throw new Error("Expected anthropic/claude-sonnet-4-5 model to exist");
const oldUser = createMessageEntry(createUserMessage("Older turn"));
const oldAssistant = createMessageEntry(createAssistantMessage("Older answer"));
const previousCompaction = createCompactionEntry("Previous summary", oldAssistant.id);
previousCompaction.preserveData = {
otherState: "keep-me",
openaiRemoteCompaction: {
replacementHistory: [{ type: "compaction", encrypted_content: "stale_encrypted" }],
compactionItem: { type: "compaction", encrypted_content: "stale_encrypted" },
},
};
const entries: SessionEntry[] = [
oldUser,
oldAssistant,
previousCompaction,
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createAssistantMessage("Answer 1", createMockUsage(0, 100, 4000, 0))),
createMessageEntry(createUserMessage("Turn 2")),
createMessageEntry(createAssistantMessage("Answer 2", createMockUsage(0, 100, 9000, 0))),
];
const preparation = prepareCompaction(entries, {
...DEFAULT_COMPACTION_SETTINGS,
keepRecentTokens: 1000,
remoteEnabled: true,
});
if (!preparation) throw new Error("Expected compaction preparation");
const completeSimpleSpy = vi.spyOn(ai, "completeSimple");
completeSimpleSpy
.mockResolvedValueOnce(createAssistantMessage("History summary"))
.mockResolvedValueOnce(createAssistantMessage("Turn prefix summary"))
.mockResolvedValueOnce(createAssistantMessage("Short summary"));
const result = await compact(preparation, model, "test-api-key");
expect(result.preserveData).toEqual({ otherState: "keep-me" });
});
});
describe("findCutPoint", () => {
it("should find cut point based on actual token differences", () => {
// Create entries with cumulative token counts
const entries: SessionEntry[] = [];
for (let i = 0; i < 10; i++) {
entries.push(createMessageEntry(createUserMessage(`User ${i}`)));
entries.push(
createMessageEntry(createAssistantMessage(`Assistant ${i}`, createMockUsage(0, 100, (i + 1) * 1000, 0))),
);
}
// 20 entries, last assistant has 10000 tokens
// keepRecentTokens = 2500: keep entries where diff < 2500
const result = findCutPoint(entries, 0, entries.length, 2500);
// Should cut at a valid cut point (user or assistant message)
expect(entries[result.firstKeptEntryIndex].type).toBe("message");
const role = (entries[result.firstKeptEntryIndex] as SessionMessageEntry).message.role;
expect(role === "user" || role === "assistant").toBe(true);
});
it("should return startIndex if no valid cut points in range", () => {
const entries: SessionEntry[] = [createMessageEntry(createAssistantMessage("a"))];
const result = findCutPoint(entries, 0, entries.length, 1000);
expect(result.firstKeptEntryIndex).toBe(0);
});
it("should keep everything if all messages fit within budget", () => {
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("1")),
createMessageEntry(createAssistantMessage("a", createMockUsage(0, 50, 500, 0))),
createMessageEntry(createUserMessage("2")),
createMessageEntry(createAssistantMessage("b", createMockUsage(0, 50, 1000, 0))),
];
const result = findCutPoint(entries, 0, entries.length, 50000);
expect(result.firstKeptEntryIndex).toBe(0);
});
it("should indicate split turn when cutting at assistant message", () => {
// Create a scenario where we cut at an assistant message mid-turn
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("Turn 1")),
createMessageEntry(createAssistantMessage("A1", createMockUsage(0, 100, 1000, 0))),
createMessageEntry(createUserMessage("Turn 2")), // index 2
createMessageEntry(createAssistantMessage("A2-1", createMockUsage(0, 100, 5000, 0))), // index 3
createMessageEntry(createAssistantMessage("A2-2", createMockUsage(0, 100, 8000, 0))), // index 4
createMessageEntry(createAssistantMessage("A2-3", createMockUsage(0, 100, 10000, 0))), // index 5
];
// With keepRecentTokens = 3000, should cut somewhere in Turn 2
const result = findCutPoint(entries, 0, entries.length, 3000);
// If cut at assistant message (not user), should indicate split turn
const cutEntry = entries[result.firstKeptEntryIndex] as SessionMessageEntry;
if (cutEntry.message.role === "assistant") {
expect(result.isSplitTurn).toBe(true);
expect(result.turnStartIndex).toBe(2); // Turn 2 starts at index 2
}
});
});
describe("buildSessionContext", () => {
it("should load all messages when no compaction", () => {
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("1")),
createMessageEntry(createAssistantMessage("a")),
createMessageEntry(createUserMessage("2")),
createMessageEntry(createAssistantMessage("b")),
];
const loaded = buildSessionContext(entries);
expect(loaded.messages.length).toBe(4);
expect(loaded.thinkingLevel).toBe("off");
expect(loaded.models.default).toBe("anthropic/claude-sonnet-4-5");
});
it("should handle single compaction", () => {
// IDs: u1=test-id-0, a1=test-id-1, u2=test-id-2, a2=test-id-3, compaction=test-id-4, u3=test-id-5, a3=test-id-6
const u1 = createMessageEntry(createUserMessage("1"));
const a1 = createMessageEntry(createAssistantMessage("a"));
const u2 = createMessageEntry(createUserMessage("2"));
const a2 = createMessageEntry(createAssistantMessage("b"));
const compaction = createCompactionEntry("Summary of 1,a,2,b", u2.id); // keep from u2 onwards
const u3 = createMessageEntry(createUserMessage("3"));
const a3 = createMessageEntry(createAssistantMessage("c"));
const entries: SessionEntry[] = [u1, a1, u2, a2, compaction, u3, a3];
const loaded = buildSessionContext(entries);
// summary + kept (u2, a2) + after (u3, a3) = 5
expect(loaded.messages.length).toBe(5);
expect(loaded.messages[0].role).toBe("compactionSummary");
expect((loaded.messages[0] as any).summary).toContain("Summary of 1,a,2,b");
});
it("should handle multiple compactions (only latest matters)", () => {
// First batch
const u1 = createMessageEntry(createUserMessage("1"));
const a1 = createMessageEntry(createAssistantMessage("a"));
const compact1 = createCompactionEntry("First summary", u1.id);
// Second batch
const u2 = createMessageEntry(createUserMessage("2"));
const b = createMessageEntry(createAssistantMessage("b"));
const u3 = createMessageEntry(createUserMessage("3"));
const c = createMessageEntry(createAssistantMessage("c"));
const compact2 = createCompactionEntry("Second summary", u3.id); // keep from u3 onwards
// After second compaction
const u4 = createMessageEntry(createUserMessage("4"));
const d = createMessageEntry(createAssistantMessage("d"));
const entries: SessionEntry[] = [u1, a1, compact1, u2, b, u3, c, compact2, u4, d];
const loaded = buildSessionContext(entries);
// summary + kept from u3 (u3, c) + after (u4, d) = 5
expect(loaded.messages.length).toBe(5);
expect((loaded.messages[0] as any).summary).toContain("Second summary");
});
it("should keep all messages when firstKeptEntryId is first entry", () => {
const u1 = createMessageEntry(createUserMessage("1"));
const a1 = createMessageEntry(createAssistantMessage("a"));
const compact1 = createCompactionEntry("First summary", u1.id); // keep from first entry
const u2 = createMessageEntry(createUserMessage("2"));
const b = createMessageEntry(createAssistantMessage("b"));
const entries: SessionEntry[] = [u1, a1, compact1, u2, b];
const loaded = buildSessionContext(entries);
// summary + all messages (u1, a1, u2, b) = 5
expect(loaded.messages.length).toBe(5);
});
it("should track model and thinking level changes", () => {
const entries: SessionEntry[] = [
createMessageEntry(createUserMessage("1")),
createModelChangeEntry("openai", "gpt-4"),
createMessageEntry(createAssistantMessage("a")),
createThinkingLevelEntry("high"),
];
const loaded = buildSessionContext(entries);
// Issue #849: explicit model_change wins over assistant-message inference.
expect(loaded.models.default).toBe("openai/gpt-4");
expect(loaded.thinkingLevel).toBe("high");
});
});
// ============================================================================
// Integration tests with real session data
// ============================================================================
describe("Large session fixture", () => {
it("should find cut point in large session", async () => {
const entries = await loadLargeSessionEntries();
const result = findCutPoint(entries, 0, entries.length, DEFAULT_COMPACTION_SETTINGS.keepRecentTokens);
// Cut point should be at a message entry (user or assistant)
expect(entries[result.firstKeptEntryIndex].type).toBe("message");
const role = (entries[result.firstKeptEntryIndex] as SessionMessageEntry).message.role;
expect(role === "user" || role === "assistant").toBe(true);
});
});
// ============================================================================
// LLM integration tests (skipped without API key)
// ============================================================================
describe.skipIf(!e2eApiKey("ANTHROPIC_API_KEY"))("LLM summarization", () => {
it("should produce valid session after compaction", async () => {
const entries = await loadLargeSessionEntries();
const loaded = buildSessionContext(entries);
const model = getBundledModel("anthropic", "claude-sonnet-4-5")!;
const preparation = prepareCompaction(entries, DEFAULT_COMPACTION_SETTINGS);
expect(preparation).toBeDefined();
const compactionResult = await compact(preparation!, model, e2eApiKey("ANTHROPIC_API_KEY")!);
// Simulate appending compaction to entries by creating a proper entry
const lastEntry = entries[entries.length - 1];
const parentId = lastEntry.id;
const compactionEntry: CompactionEntry = {
type: "compaction",
id: "compaction-test-id",
parentId,
timestamp: new Date().toISOString(),
...compactionResult,
};
const newEntries = [...entries, compactionEntry];
const reloaded = buildSessionContext(newEntries);
// Should have summary + kept messages
expect(reloaded.messages.length).toBeLessThan(loaded.messages.length);
expect(reloaded.messages[0].role).toBe("compactionSummary");
expect((reloaded.messages[0] as any).summary).toContain(compactionResult.summary);
console.log("Original messages:", loaded.messages.length);
console.log("After compaction:", reloaded.messages.length);
}, 60000);
});