feat(06-01): add session management service with rotation, thresholds, and delta tracking

- Create createSessionManagementService factory with accumulateTokenUsage,
  evaluateRotation (configurable thresholds per D-01), generateHandoff,
  rotateSession, getHandoffContext, snapshotUsage, getUsageDelta
- Export DEFAULT_THRESHOLDS (maxRuns: 20, maxTokens: 500k, maxAgeHours: 72) and RotationThresholds type
- Adapter nativeContextManagement exemption skips rotation for Claude/Codex (D-04)
- Handoff markdown capped at 2000 chars with structured sections (D-06)
- Add 14 unit tests for service: rotation thresholds, adapter exemption, configurable
  thresholds, token accumulation, handoff generation, session rotation, usage delta

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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ZacharyZhang-NYandClaude Opus 4.6 committed 2026-03-26 22:56:18 -04:00
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@@ -14,7 +14,8 @@ vi.mock("electron", () => ({
import { AppDatabase } from "../../src/main/database";
import { getConnectorDefinition } from "../../src/main/connectors";
import type { ConnectorId } from "@shared/types";
import { createSessionManagementService, DEFAULT_THRESHOLDS } from "../../src/main/session-management-service";
import type { ConnectorId, TaskSessionRecord } from "@shared/types";
// ---------------------------------------------------------------------------
// Helpers — create a minimal company + agent + task scaffold
@@ -259,3 +260,453 @@ describe("adapter exemption", () => {
expect(def.module.nativeContextManagement).toBe(false);
});
});
// ===========================================================================
// Session management service tests
// ===========================================================================
describe("session management service", () => {
let tempDir: string;
let db: AppDatabase;
const mockLogger = {
info: vi.fn(),
warn: vi.fn(),
error: vi.fn(),
};
beforeEach(async () => {
tempDir = await mkdtemp(join(tmpdir(), "agentcompany-svc-"));
db = new AppDatabase(tempDir);
db.init();
mockLogger.info.mockClear();
mockLogger.warn.mockClear();
mockLogger.error.mockClear();
});
afterEach(async () => {
db.close();
await rm(tempDir, { recursive: true, force: true });
});
// -------------------------------------------------------------------------
// rotation thresholds
// -------------------------------------------------------------------------
describe("rotation thresholds", () => {
it("returns shouldRotate: false when below all thresholds", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 5,
totalInputTokens: 10000,
totalOutputTokens: 5000,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local");
expect(result.shouldRotate).toBe(false);
expect(result.reason).toBeNull();
});
it("returns shouldRotate: true with reason max_runs when run_count >= 20", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 20,
totalInputTokens: 0,
totalOutputTokens: 0,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local");
expect(result.shouldRotate).toBe(true);
expect(result.reason).toBe("max_runs");
});
it("returns shouldRotate: true with reason max_tokens when total tokens >= 500000", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 3,
totalInputTokens: 300000,
totalOutputTokens: 200000,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local");
expect(result.shouldRotate).toBe(true);
expect(result.reason).toBe("max_tokens");
});
it("returns shouldRotate: true with reason max_age_hours when session created > 72h ago", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const oldDate = new Date(Date.now() - 73 * 60 * 60 * 1000).toISOString();
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 1,
totalInputTokens: 100,
totalOutputTokens: 100,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: oldDate,
updatedAt: oldDate,
};
const result = svc.evaluateRotation(session, "gemini_local");
expect(result.shouldRotate).toBe(true);
expect(result.reason).toBe("max_age_hours");
});
});
// -------------------------------------------------------------------------
// adapter exemption in service
// -------------------------------------------------------------------------
describe("adapter exemption in evaluateRotation", () => {
it("returns shouldRotate: false for nativeContextManagement=true even when thresholds exceeded", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "claude_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 100, // Way over threshold
totalInputTokens: 1000000,
totalOutputTokens: 500000,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date(Date.now() - 200 * 60 * 60 * 1000).toISOString(), // Way old
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "claude_local");
expect(result.shouldRotate).toBe(false);
expect(result.reason).toBeNull();
});
});
// -------------------------------------------------------------------------
// configurable thresholds (D-01)
// -------------------------------------------------------------------------
describe("configurable thresholds (D-01)", () => {
it("evaluateRotation with custom thresholds override { maxRuns: 5 } triggers at 5 runs", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 5,
totalInputTokens: 100,
totalOutputTokens: 100,
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local", { maxRuns: 5 });
expect(result.shouldRotate).toBe(true);
expect(result.reason).toBe("max_runs");
});
it("partial override { maxTokens: 100000 } uses override for tokens but defaults for runs and age", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 10, // Below default 20
totalInputTokens: 60000,
totalOutputTokens: 40000, // Total 100000 = meets override threshold
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local", { maxTokens: 100000 });
expect(result.shouldRotate).toBe(true);
expect(result.reason).toBe("max_tokens");
});
it("omitting override uses DEFAULT_THRESHOLDS", () => {
const svc = createSessionManagementService({ db, logger: mockLogger });
const session: TaskSessionRecord = {
id: "sess-1",
companyId: "co-1",
taskId: "task-1",
agentId: "agent-1",
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
lastRunId: null,
lastError: null,
runCount: 19, // Just below default 20
totalInputTokens: 200000,
totalOutputTokens: 200000, // Total 400000, below default 500000
rotatedAt: null,
rotationReason: null,
handoffMarkdown: null,
createdAt: new Date().toISOString(),
updatedAt: new Date().toISOString(),
};
const result = svc.evaluateRotation(session, "gemini_local");
expect(result.shouldRotate).toBe(false);
expect(result.reason).toBeNull();
// Verify DEFAULT_THRESHOLDS values
expect(DEFAULT_THRESHOLDS.maxRuns).toBe(20);
expect(DEFAULT_THRESHOLDS.maxTokens).toBe(500_000);
expect(DEFAULT_THRESHOLDS.maxAgeHours).toBe(72);
});
});
// -------------------------------------------------------------------------
// token accumulation
// -------------------------------------------------------------------------
describe("token accumulation", () => {
it("accumulateTokenUsage calls db.incrementSessionUsage with correct args", () => {
const { taskId, companyId, agentId } = scaffold(db);
const sessionId = db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "claude_local",
sessionParamsJson: null,
sessionDisplayId: null,
});
const svc = createSessionManagementService({ db, logger: mockLogger });
svc.accumulateTokenUsage(sessionId, 5000, 2000, "run-abc");
const session = db.getActiveTaskSession(taskId);
expect(session!.runCount).toBe(1);
expect(session!.totalInputTokens).toBe(5000);
expect(session!.totalOutputTokens).toBe(2000);
expect(session!.lastRunId).toBe("run-abc");
});
});
// -------------------------------------------------------------------------
// handoff generation
// -------------------------------------------------------------------------
describe("handoff generation", () => {
it("generateHandoff produces markdown with task title and run history", () => {
const { taskId, companyId, agentId, workspaceId } = scaffold(db);
const sessionId = db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
});
// Create a completed run for history
const run = db.createRun({ companyId, taskId, agentId, workspaceId, connectorId: "gemini_local" as ConnectorId });
db.finishRun({
runId: run.id,
status: "completed",
summary: "Implemented initial logic",
errorMessage: null,
exitCode: 0,
signal: null,
model: "gemini-pro",
sessionDisplayId: null,
costUsd: 0.05,
unattributedCost: false,
});
// Increment session usage to have stats
db.incrementSessionUsage(sessionId, 10000, 5000, run.id);
const session = db.getActiveTaskSession(taskId)!;
const svc = createSessionManagementService({ db, logger: mockLogger });
const handoff = svc.generateHandoff(taskId, session);
expect(handoff).toContain("# Session Handoff");
expect(handoff).toContain("Implement session rotation"); // task title
expect(handoff).toContain("## Recent Run History");
expect(handoff).toContain("completed");
expect(handoff).toContain("15000 total tokens"); // 10000 + 5000
});
});
// -------------------------------------------------------------------------
// session rotation
// -------------------------------------------------------------------------
describe("session rotation", () => {
it("rotateSession archives old session, creates new, copies session_params", () => {
const { taskId, companyId, agentId } = scaffold(db);
const oldSessionId = db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "gemini_local",
sessionParamsJson: JSON.stringify({ resumeId: "old-abc" }),
sessionDisplayId: "gemini-old",
});
// Add some usage
db.incrementSessionUsage(oldSessionId, 300000, 200000, "run-10");
const oldSession = db.getActiveTaskSession(taskId)!;
const svc = createSessionManagementService({ db, logger: mockLogger });
const newSessionId = svc.rotateSession(oldSession);
expect(newSessionId).not.toBe(oldSessionId);
// Old session should be archived
const archivedRows = db.queryAll<{ rotatedAt: string | null; rotationReason: string | null; handoffMarkdown: string | null }>(
"SELECT rotated_at as rotatedAt, rotation_reason as rotationReason, handoff_markdown as handoffMarkdown FROM task_sessions WHERE id = ?",
oldSessionId
);
expect(archivedRows[0].rotatedAt).toBeTruthy();
expect(archivedRows[0].rotationReason).toBe("threshold_exceeded");
expect(archivedRows[0].handoffMarkdown).toContain("# Session Handoff");
// New session should be active, with fresh counters and copied params
const newSession = db.getActiveTaskSession(taskId)!;
expect(newSession.id).toBe(newSessionId);
expect(newSession.runCount).toBe(0);
expect(newSession.totalInputTokens).toBe(0);
expect(newSession.totalOutputTokens).toBe(0);
expect(newSession.sessionParamsJson).toBe(JSON.stringify({ resumeId: "old-abc" }));
expect(newSession.sessionDisplayId).toBe("gemini-old");
});
});
// -------------------------------------------------------------------------
// handoff context retrieval
// -------------------------------------------------------------------------
describe("handoff context retrieval", () => {
it("getHandoffContext returns handoff_markdown from most recently rotated session", () => {
const { taskId, companyId, agentId } = scaffold(db);
const svc = createSessionManagementService({ db, logger: mockLogger });
// Create and rotate a session
const session1Id = db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
});
db.incrementSessionUsage(session1Id, 100000, 50000, "run-1");
const session1 = db.getActiveTaskSession(taskId)!;
svc.rotateSession(session1);
const handoff = svc.getHandoffContext(taskId);
expect(handoff).not.toBeNull();
expect(handoff).toContain("# Session Handoff");
});
it("getHandoffContext returns null when no rotated sessions exist", () => {
const { taskId, companyId, agentId } = scaffold(db);
db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
});
const svc = createSessionManagementService({ db, logger: mockLogger });
const handoff = svc.getHandoffContext(taskId);
expect(handoff).toBeNull();
});
});
// -------------------------------------------------------------------------
// usage delta (D-09)
// -------------------------------------------------------------------------
describe("usage delta", () => {
it("getUsageDelta returns token difference between snapshot and current totals", () => {
const { taskId, companyId, agentId } = scaffold(db);
const sessionId = db.createNewSession({
taskId,
companyId,
agentId,
adapterType: "gemini_local",
sessionParamsJson: null,
sessionDisplayId: null,
});
// Pre-populate some usage
db.incrementSessionUsage(sessionId, 1000, 500, "run-1");
const session = db.getActiveTaskSession(taskId)!;
const svc = createSessionManagementService({ db, logger: mockLogger });
// Snapshot current state
const snapshot = svc.snapshotUsage(session);
expect(snapshot.inputTokens).toBe(1000);
expect(snapshot.outputTokens).toBe(500);
// Accumulate more tokens
svc.accumulateTokenUsage(sessionId, 3000, 1500, "run-2");
// Delta should reflect new tokens only
const delta = svc.getUsageDelta(sessionId, snapshot);
expect(delta.inputTokensDelta).toBe(3000);
expect(delta.outputTokensDelta).toBe(1500);
});
});
});