From 2dea4afac0d49976700139a766d40734e3204f4e Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 14 Jul 2026 09:23:02 +0800 Subject: [PATCH] fix: bind stdio to its configured agent --- packages/ui/stdio-agent/README.md | 2 +- packages/ui/stdio-agent/src/index.ts | 5 ++- packages/ui/stdio-agent/src/stdio-chat.ts | 30 +++++++++++----- .../ui/stdio-agent/tests/stdio-chat.spec.ts | 35 ++++++++++++++----- 4 files changed, 53 insertions(+), 19 deletions(-) diff --git a/packages/ui/stdio-agent/README.md b/packages/ui/stdio-agent/README.md index 82da64cd81..d7d30ee49d 100644 --- a/packages/ui/stdio-agent/README.md +++ b/packages/ui/stdio-agent/README.md @@ -32,7 +32,7 @@ The leaf `cordis.yml` supplies only the **swappable backends** — an LLM adapte | `welcome` | `ready.` | the stdin-chat banner | | `resumeSessionId` | — | resume a persisted session id instead of starting fresh (sourced from an env var in the leaf) | -Fresh stdio sessions use the process launch directory as `session.header.cwd` and mint one combined `main-session-` agent/session id, so durable restarts cannot collide. The UI's `main` text is a display label, not a second routing id. Resumed sessions register under the exact `resumeSessionId` and keep the cwd stored in the persisted session header. +Fresh stdio sessions use the process launch directory as `session.header.cwd` and mint one combined `main-session-` agent/session id, so durable restarts cannot collide. The UI's `main` text is a display label, not a second routing id; the UI binds to that fresh-id namespace, or to the exact `resumeSessionId` for a resumed run, and never selects unrelated registry roots. Resumed sessions keep the cwd stored in the persisted session header. ## The bin diff --git a/packages/ui/stdio-agent/src/index.ts b/packages/ui/stdio-agent/src/index.ts index f01c48a615..2eca0cceb3 100644 --- a/packages/ui/stdio-agent/src/index.ts +++ b/packages/ui/stdio-agent/src/index.ts @@ -124,5 +124,8 @@ export function apply(ctx: Context, config: Config): void { ctx.plugin(SessionPersistenceJsonl, { root: config.persistenceRoot ?? './.sessions' }) ctx.plugin(UserInteractionService) ctx.plugin(toolAskUser) - ctx.plugin(uiStdio, { welcome: config.welcome ?? 'ready.' }) + ctx.plugin(uiStdio, { + welcome: config.welcome ?? 'ready.', + ...config.resumeSessionId !== undefined ? { resumeSessionId: config.resumeSessionId } : {}, + }) } diff --git a/packages/ui/stdio-agent/src/stdio-chat.ts b/packages/ui/stdio-agent/src/stdio-chat.ts index a295274786..76347c91e4 100644 --- a/packages/ui/stdio-agent/src/stdio-chat.ts +++ b/packages/ui/stdio-agent/src/stdio-chat.ts @@ -36,10 +36,13 @@ export const inject = ['agents', 'userInteraction'] export interface Config { /** Banner printed once on start, before the first `> ` prompt. */ welcome?: string + /** Exact persisted session id the app configured for resume; absent selects the app's fresh `main-session-*` identity. */ + resumeSessionId?: string } export const Config: z = z.object({ welcome: z.string().default('ready.'), + resumeSessionId: z.string(), }) /** @@ -95,16 +98,25 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt const welcome = config.welcome ?? 'ready.' const { input, output, exit } = runtime - // This app owns one configured top-level agent. Hold the live object - // directly: its per-run id is intentionally fresh, while `main` remains only - // the terminal's fixed display label. Runtime creator ownership distinguishes - // that root from its subagents even if a child is registered after an HMR - // replacement. Persisted parentSession lineage is deliberately irrelevant: - // a resumed child session can itself be this process's configured root. - let target: Agent | undefined = ctx.agents.roots()[0] - ctx.on('agent/created', () => { target ??= ctx.agents.roots()[0] }) + // Bind only to this app's configured top-level agent. Fresh runs own the + // `main-session-*` namespace; resumed runs own the exact persisted id. The + // registry's runtime-root relation excludes subagents without confusing it + // with durable parentSession lineage. Keeping the matching candidates also + // covers HMR's publish-new-before-dispose-old ordering without ever falling + // through to an unrelated root owned by another app or test fixture. + const matchesConfiguredIdentity = (agent: Agent): boolean => config.resumeSessionId === undefined + ? agent.id.startsWith('main-session-') + : agent.id === config.resumeSessionId + const configuredRoots = new Set(ctx.agents.roots().filter(matchesConfiguredIdentity)) + let target: Agent | undefined = [...configuredRoots].at(-1) + ctx.on('agent/created', (agent) => { + if (!matchesConfiguredIdentity(agent) || !ctx.agents.roots().includes(agent)) return + configuredRoots.add(agent) + target ??= agent + }) ctx.on('agent/disposed', (agent) => { - if (target === agent) target = ctx.agents.roots().at(-1) + configuredRoots.delete(agent) + if (target === agent) target = [...configuredRoots].at(-1) }) // Transcript rendering off the durable `session/event` feed — the assistant diff --git a/packages/ui/stdio-agent/tests/stdio-chat.spec.ts b/packages/ui/stdio-agent/tests/stdio-chat.spec.ts index 2600fdb24f..668068a72d 100644 --- a/packages/ui/stdio-agent/tests/stdio-chat.spec.ts +++ b/packages/ui/stdio-agent/tests/stdio-chat.spec.ts @@ -74,7 +74,7 @@ function chunkEvent(chunk: StreamChunk): SessionEvent { return { type: 'assistant/chunk', seq: 0, time: 0, data: { turn: 1, step: 0, chunk } } } -const CONFIG: Config = { welcome: 'hi there' } +const CONFIG: Config = { welcome: 'hi there', resumeSessionId: 'main' } async function setup(config: Config = CONFIG, runtimeOver: Partial = {}) { const ctx = new Context() @@ -199,7 +199,9 @@ describe('createStdioChat rendering', () => { }) it('accepts a lineage-bearing configured agent created after the UI installs', async () => { - const { ctx, input } = await setup() + const { ctx, input } = await setup({ welcome: 'hi there', resumeSessionId: 'resumed' }) + const unrelated = makeAgent('unrelated') + ctx.agents.register(unrelated) const resumed = makeAgent('resumed') ;(resumed.session.header as { parentSession?: string }).parentSession = 'persisted-parent' ctx.agents.register(resumed) @@ -207,6 +209,7 @@ describe('createStdioChat rendering', () => { input.feed('continue') await new Promise(resolve => setImmediate(resolve)) + expect(unrelated.sent).toEqual([]) expect(resumed.sent).toEqual([[{ type: 'text', text: 'continue' }]]) }) @@ -235,7 +238,7 @@ describe('createStdioChat rendering', () => { it('keeps the target when a different agent is disposed', async () => { const { ctx, out } = await setup() - const target = makeAgent('target') + const target = makeAgent('main') ctx.agents.register(target) ctx.emit('agent/disposed', makeAgent('other')) ctx.emit('session/event', target.session, { @@ -245,11 +248,11 @@ describe('createStdioChat rendering', () => { }) it('retargets a surviving root when HMR publishes it before disposing the old root', async () => { - const { ctx, input } = await setup() - const oldRoot = makeAgent('old-root') + const { ctx, input } = await setup({ welcome: 'hi there' }) + const oldRoot = makeAgent('main-session-old') const child = makeAgent('child') ;(child.session.header as { parentSession?: string }).parentSession = oldRoot.id - const replacement = makeAgent('replacement') + const replacement = makeAgent('main-session-replacement') const lateChild = makeAgent('late-child') const disposeOld = ctx.agents.register(oldRoot) const disposeChild = ctx.agents.enter(child, oldRoot) @@ -273,6 +276,22 @@ describe('createStdioChat rendering', () => { disposeChild() }) + it('does not retarget stdin to an unrelated root after the configured agent is disposed', async () => { + const { ctx, input } = await setup() + const unrelated = makeAgent('unrelated') + ctx.agents.register(unrelated) + const configured = makeAgent('main') + const disposeConfigured = ctx.agents.register(configured) + const error = vi.spyOn(ctx.logger, 'error').mockImplementation(() => {}) + + disposeConfigured() + input.feed('must not leak') + await new Promise(resolve => setImmediate(resolve)) + + expect(unrelated.sent).toEqual([]) + expect(error).toHaveBeenCalledWith('ui-stdio: main agent is not running') + }) + it('renders tool/call and tool/result session events', async () => { const { ctx, out } = await setup() const session = {} as Session @@ -720,8 +739,8 @@ describe('createStdioChat input', () => { expect(spy).toHaveBeenCalledWith('ui-stdio: main agent is not running') }) - it('drives the app-owned agent without a duplicate id config', async () => { - const { ctx, input } = await setup({ welcome: 'w' }) + it('drives the exact app-configured resumed session', async () => { + const { ctx, input } = await setup({ welcome: 'w', resumeSessionId: 'worker' }) const agent = makeAgent('worker') ctx.agents.register(agent) input.feed('hi')