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fix: allow lineage-bearing stdio targets

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This commit is contained in:
Tianyi Cui
2026-07-14 06:52:46 +08:00
parent 3c90cd7a6f
commit 3bd2052d72
2 changed files with 27 additions and 14 deletions
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24
packages/ui/stdio-agent/src/stdio-chat.ts
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@@ -95,20 +95,18 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt
const welcome = config.welcome ?? 'ready.'
const { input, output, exit } = runtime
// This app owns one root agent. Hold the live object directly: its per-run id
// is intentionally fresh, while `main` remains only the terminal's fixed
// display label. HMR may publish the replacement before old teardown emits
// disposed, so a target disposal reselects the surviving root from the live
// registry instead of leaving the terminal detached. Fork children carry
// parentSession lineage and must never become the terminal target.
const rootAgent = (): Agent | undefined =>
ctx.agents.list().find(agent => agent.session.header.parentSession === undefined)
let target: Agent | undefined = rootAgent()
ctx.on('agent/created', (agent) => {
if (target === undefined && agent.session.header.parentSession === undefined) target = agent
})
// This app owns one configured agent. Hold the live object directly: its
// per-run id is intentionally fresh, while `main` remains only the
// terminal's fixed display label. At install the configured agent is the
// earliest registry entry (it creates any subagents later). During HMR the
// replacement is published after the old tree, so when old teardown finally
// emits disposed, the newest survivor is the replacement. Persisted
// parentSession lineage is deliberately irrelevant: a resumed child session
// can itself be this process's configured top-level agent.
let target: Agent | undefined = ctx.agents.list()[0]
ctx.on('agent/created', (agent) => { target ??= agent })
ctx.on('agent/disposed', (agent) => {
if (target === agent) target = rootAgent()
if (target === agent) target = ctx.agents.list().at(-1)
})
// Transcript rendering off the durable `session/event` feed — the assistant