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import { SyncDescriptor } from '#/_base/di/descriptors';
import { AsyncEmitter, Emitter } from '#/_base/event';
import { IAgentPluginService } from '#/agent/plugin/agentPlugin';
import { AgentPluginService } from '#/agent/plugin/agentPluginService';
import { USER_PROMPT_ORIGIN } from '#/agent/contextMemory/types';
import { IAgentLoopService } from '#/agent/loop/loop';
import { IEventBus } from '#/app/event/eventBus';
import { TurnStarted } from '#/agent/loop/turnEvents';
import { IPluginService } from '#/app/plugin/plugin';
import type {
EnabledPluginSessionStart,
PluginMutationSummary,
PluginReloadEvent,
} from '#/app/plugin/types';
import { InMemorySkillCatalog } from '#/features/skill/catalog/registry';
import { summarizeSkill } from '#/features/skill/catalog/types';
import type { SkillDefinition } from '#/features/skill/catalog/types';
import { ISessionSkillCatalog } from '#/features/skill/session/skillCatalog';
import { agentService, appService, createTestAgent, skillServices, type TestAgentContext } from '../../harness';
import { stubPluginService } from '../../app/plugin/stubs';
function pluginSkill(): SkillDefinition {
return {
name: 'demo-skill',
description: 'A plugin skill',
path: '/plugins/demo/skills/demo-skill/SKILL.md',
dir: '/plugins/demo/skills/demo-skill',
content: 'Do the demo thing.',
metadata: {},
source: 'extra',
plugin: { id: 'demo', instructions: 'Always be helpful.' },
};
}
function findPluginSessionStartEventMessages(ctx: TestAgentContext) {
return ctx.contextData().history.filter(
(message) =>
message.origin?.kind === 'injection' && message.origin.variant === 'plugin_session_start',
);
}
function messageText(message: { readonly content: readonly { readonly type: string; readonly text?: string }[] }): string {
return message.content.map((part) => (part.type === 'text' ? (part.text ?? '') : '')).join('');
}
async function runInjectionBoundary(ctx: TestAgentContext): Promise<void> {
await ctx.restorePersisted();
await ctx.get(IAgentLoopService).hooks.onWillBeginStep.run({
turnId: 0,
step: 1,
firstStepOfTurn: true,
signal: new AbortController().signal,
});
}
describe('AgentPluginService plugin session-start wiring', () => {
let ctx: TestAgentContext | undefined;
afterEach(async () => {
if (ctx !== undefined) await ctx.dispose();
ctx = undefined;
});
it('injects the plugin session-start reminder through the real service registration', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({ sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }] }),
),
skillServices(catalog),
agentService(
IAgentPluginService,
new SyncDescriptor(AgentPluginService),
),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
const injected = findPluginSessionStartEventMessages(ctx).at(-1);
expect(injected).toBeDefined();
const text = injected === undefined ? '' : messageText(injected);
expect(text).toContain('<plugin_session_start plugin="demo" skill="demo-skill">');
expect(text).toContain('Do the demo thing.');
expect(text).toContain('Always be helpful.');
});
it('does not re-inject the plugin session-start reminder on later turns while it remains live', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({ sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }] }),
),
skillServices(catalog),
agentService(
IAgentPluginService,
new SyncDescriptor(AgentPluginService),
),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
ctx.get(IEventBus).publish(
new TurnStarted({ agentId: 'main', turnId: 2, origin: USER_PROMPT_ORIGIN }),
);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
});
it('refreshes the frozen session-start guidance through the explicit service path', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({
sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }],
}),
),
skillServices(catalog),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
const plugins = ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(messageText(findPluginSessionStartEventMessages(ctx).at(-1)!)).toContain(
'Do the demo thing.',
);
catalog.register(
{ ...pluginSkill(), content: 'Do the explicitly refreshed demo thing.' },
{ replace: true },
);
await plugins.refreshSessionStart();
const messages = findPluginSessionStartEventMessages(ctx);
expect(messages).toHaveLength(2);
expect(messageText(messages.at(-1)!)).toContain(
'Do the explicitly refreshed demo thing.',
);
expect(messageText(messages.at(-1)!)).toContain(
'supersedes any earlier plugin_session_start reminder',
);
});
it('does not inject when no plugin session starts are enabled', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
ctx = createTestAgent(
{ autoConfigure: true },
appService(IPluginService, stubPluginService({ sessionStarts: [] })),
skillServices(catalog),
agentService(
IAgentPluginService,
new SyncDescriptor(AgentPluginService),
),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(0);
});
it('re-appends a fresh reminder when the plugin skill source finishes refreshing', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
const sinkChange = new Emitter<string>();
const skillCatalog: ISessionSkillCatalog = {
_serviceBrand: undefined,
catalog,
ready: Promise.resolve(),
onDidChange: sinkChange.event,
load: async () => {},
reload: async () => {},
list: async () => catalog.listSkills().map(summarizeSkill),
};
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({
sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }],
}),
),
skillServices(skillCatalog),
agentService(
IAgentPluginService,
new SyncDescriptor(AgentPluginService),
),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
sinkChange.fire('plugin');
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
await runInjectionBoundary(ctx);
const messages = findPluginSessionStartEventMessages(ctx);
expect(messages.length).toBeGreaterThanOrEqual(2);
const latest = messageText(messages.at(-1)!);
expect(latest).toContain('<plugin_session_start plugin="demo" skill="demo-skill">');
expect(latest).toContain('supersedes any earlier plugin_session_start reminder');
sinkChange.dispose();
});
it('appends only for the plugin source when unrelated and plugin changes arrive together', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
const sinkChange = new Emitter<string>();
const skillCatalog: ISessionSkillCatalog = {
_serviceBrand: undefined,
catalog,
ready: Promise.resolve(),
onDidChange: sinkChange.event,
load: async () => {},
reload: async () => {},
list: async () => catalog.listSkills().map(summarizeSkill),
};
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({
sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }],
}),
),
skillServices(skillCatalog),
agentService(
IAgentPluginService,
new SyncDescriptor(AgentPluginService),
),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
sinkChange.fire('user');
sinkChange.fire('plugin');
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(2);
sinkChange.dispose();
});
it('reconciles the current plugin guidance after undo removes its latest render', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
const sinkChange = new Emitter<string>();
const skillCatalog: ISessionSkillCatalog = {
_serviceBrand: undefined,
catalog,
ready: Promise.resolve(),
onDidChange: sinkChange.event,
load: async () => {},
reload: async () => {},
list: async () => catalog.listSkills().map(summarizeSkill),
};
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({
sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }],
}),
),
skillServices(skillCatalog),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
ctx.get(IAgentPluginService);
await ctx.restorePersisted();
ctx.mockNextResponse({ type: 'text', text: 'first answer' });
await ctx.rpc.prompt({ input: [{ type: 'text', text: 'first prompt' }] });
await ctx.untilTurnEnd();
catalog.register(
{ ...pluginSkill(), content: 'Do the updated demo thing.' },
{ replace: true },
);
sinkChange.fire('plugin');
ctx.mockNextResponse({ type: 'text', text: 'second answer' });
await ctx.rpc.prompt({ input: [{ type: 'text', text: 'second prompt' }] });
await ctx.untilTurnEnd();
await ctx.undoHistory(1);
ctx.mockNextResponse({ type: 'text', text: 'third answer' });
await ctx.rpc.prompt({ input: [{ type: 'text', text: 'third prompt' }] });
await ctx.untilTurnEnd();
const latest = findPluginSessionStartEventMessages(ctx).at(-1);
expect(latest).toBeDefined();
expect(messageText(latest!)).toContain('Do the updated demo thing.');
expect(messageText(latest!)).toContain(
'supersedes any earlier plugin_session_start reminder',
);
sinkChange.dispose();
});
});
describe('AgentPluginService plugin-change reminder', () => {
let ctx: TestAgentContext | undefined;
afterEach(async () => {
if (ctx !== undefined) await ctx.dispose();
ctx = undefined;
});
function findPluginChangeMessages(context: TestAgentContext) {
return context.contextData().history.filter(
(message) =>
message.origin?.kind === 'injection' && message.origin.variant === 'plugin_change',
);
}
it('appends a plugin_change system reminder when the plugin set mutates', async () => {
const mutateEmitter = new Emitter<PluginMutationSummary>();
ctx = createTestAgent(
{ autoConfigure: true },
appService(IPluginService, stubPluginService({ sessionStarts: [], mutateEmitter })),
skillServices(new InMemorySkillCatalog()),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
ctx.get(IAgentPluginService);
mutateEmitter.fire({
added: [],
removed: [],
errors: [],
mutation: { kind: 'enable', id: 'demo' },
});
const messages = findPluginChangeMessages(ctx);
expect(messages).toHaveLength(1);
expect(messageText(messages[0]!)).toContain('Plugin "demo" was enabled.');
expect(messageText(messages[0]!)).toContain('run /new or /reload to apply the change');
mutateEmitter.dispose();
});
it('does not append the plugin_change reminder on an explicit reload', async () => {
const reloadEmitter = new AsyncEmitter<PluginReloadEvent>();
ctx = createTestAgent(
{ autoConfigure: true },
appService(IPluginService, stubPluginService({ sessionStarts: [], reloadEmitter })),
skillServices(new InMemorySkillCatalog()),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
ctx.get(IAgentPluginService);
await reloadEmitter.fireAsyncConcurrent(
{ added: [], removed: [], errors: [] },
new AbortController().signal,
);
expect(findPluginChangeMessages(ctx)).toHaveLength(0);
reloadEmitter.dispose();
});
function skillCatalogWithChange(catalog: InMemorySkillCatalog, change: Emitter<string>) {
const skillCatalog: ISessionSkillCatalog = {
_serviceBrand: undefined,
catalog,
ready: Promise.resolve(),
onDidChange: change.event,
load: async () => {},
reload: async () => {},
list: async () => catalog.listSkills().map(summarizeSkill),
};
return skillCatalog;
}
function fireMutation(mutateEmitter: Emitter<PluginMutationSummary>, id: string): void {
mutateEmitter.fire({
added: [],
removed: [],
errors: [],
mutation: { kind: 'install', id },
});
}
it('suppresses the session-start refresh for mutation-driven catalog changes', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
const sinkChange = new Emitter<string>();
const mutateEmitter = new Emitter<PluginMutationSummary>();
let sessionStarts: readonly EnabledPluginSessionStart[] = [
{ pluginId: 'demo', skillName: 'demo-skill' },
];
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
{
...stubPluginService({ sessionStarts, mutateEmitter }),
enabledSessionStarts: async () => sessionStarts,
},
),
skillServices(skillCatalogWithChange(catalog, sinkChange)),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
fireMutation(mutateEmitter, 'demo');
sessionStarts = [];
sinkChange.fire('plugin');
await runInjectionBoundary(ctx);
expect(findPluginChangeMessages(ctx)).toHaveLength(1);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
sinkChange.fire('plugin');
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx).length).toBeGreaterThanOrEqual(2);
sinkChange.dispose();
mutateEmitter.dispose();
});
it('suppresses one session-start refresh per mutation when mutations arrive back to back', async () => {
const catalog = new InMemorySkillCatalog();
catalog.register(pluginSkill());
const sinkChange = new Emitter<string>();
const mutateEmitter = new Emitter<PluginMutationSummary>();
ctx = createTestAgent(
{ autoConfigure: true },
appService(
IPluginService,
stubPluginService({
sessionStarts: [{ pluginId: 'demo', skillName: 'demo-skill' }],
mutateEmitter,
}),
),
skillServices(skillCatalogWithChange(catalog, sinkChange)),
agentService(IAgentPluginService, new SyncDescriptor(AgentPluginService)),
);
ctx.get(IAgentPluginService);
await runInjectionBoundary(ctx);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
fireMutation(mutateEmitter, 'demo');
fireMutation(mutateEmitter, 'demo');
sinkChange.fire('plugin');
sinkChange.fire('plugin');
await new Promise((resolve) => setTimeout(resolve, 0));
expect(findPluginChangeMessages(ctx)).toHaveLength(2);
expect(findPluginSessionStartEventMessages(ctx)).toHaveLength(1);
sinkChange.dispose();
mutateEmitter.dispose();
});
});
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