run: defer startup work until first paint

Keep optional initialization off the critical rendering path so the prompt
appears before network and heavy module startup completes. Stop deferred
work when the footer closes to avoid needless requests during early exit.

packages/opencode/src/cli/cmd/run/catalog.shared.ts

@@ -4,7 +4,9 @@ import type { RunAgent, RunCommand, RunProvider, RunReference } from "./types"
 type CurrentAgent = NonNullable<Awaited<ReturnType<OpencodeClient["v2"]["agent"]["list"]>>["data"]>["data"][number]
 type CurrentCommand = NonNullable<Awaited<ReturnType<OpencodeClient["v2"]["command"]["list"]>>["data"]>["data"][number]
 type CurrentSkill = NonNullable<Awaited<ReturnType<OpencodeClient["v2"]["skill"]["list"]>>["data"]>["data"][number]
-type CurrentProvider = NonNullable<Awaited<ReturnType<OpencodeClient["v2"]["provider"]["list"]>>["data"]>["data"][number]
+type CurrentProvider = NonNullable<
+  Awaited<ReturnType<OpencodeClient["v2"]["provider"]["list"]>>["data"]
+>["data"][number]
 type CurrentModel = NonNullable<Awaited<ReturnType<OpencodeClient["v2"]["model"]["list"]>>["data"]>["data"][number]
 
 function location(directory: string) {
@@ -105,6 +107,23 @@ export async function waitForCatalogReady(input: {
   }
 }
 
+export async function waitForDefaultModel(input: {
+  sdk: OpencodeClient
+  directory: string
+  timeoutMs?: number
+  active?: () => boolean
+}): Promise<{ providerID: string; modelID: string } | undefined> {
+  const deadline = Date.now() + (input.timeoutMs ?? 5_000)
+  while (Date.now() < deadline && (input.active?.() ?? true)) {
+    const model = await input.sdk.v2.model
+      .default(location(input.directory), { throwOnError: true })
+      .then((result) => result.data?.data)
+      .catch(() => undefined)
+    if (model) return { providerID: model.providerID, modelID: model.id }
+    await new Promise((resolve) => setTimeout(resolve, 25))
+  }
+}
+
 export async function loadRunAgents(sdk: OpencodeClient, directory: string): Promise<RunAgent[]> {
   const result = await sdk.v2.agent.list(location(directory), { throwOnError: true })
   return (result.data?.data ?? []).map(runAgent)

packages/opencode/src/cli/cmd/run/footer.prompt.tsx

@@ -8,7 +8,7 @@
 import { pathToFileURL } from "bun"
 import { StyledText, fg, type ColorInput, type KeyEvent, type TextareaRenderable } from "@opentui/core"
 import { useRenderer } from "@opentui/solid"
-import { normalizePromptContent } from "@opencode-ai/tui/editor"
+import { normalizePromptContent } from "@opencode-ai/tui/prompt/content"
 import fuzzysort from "fuzzysort"
 import path from "path"
 import { createEffect, createMemo, createResource, createSignal, onCleanup, onMount, type Accessor } from "solid-js"

packages/opencode/src/cli/cmd/run/footer.ts

@@ -390,6 +390,10 @@ export class RunFooter implements FooterApi {
   }
 
   public event(next: FooterEvent): void {
+    if (next.type === "model") {
+      this.setCurrentModel(next.selection)
+    }
+
     if (next.type === "turn.duration") {
       const current = this.currentModel()
       this.flush()

packages/opencode/src/cli/cmd/run/runtime.boot.ts

@@ -26,6 +26,7 @@ export type ModelInfo = {
 export type SessionInfo = {
   first: boolean
   history: RunPrompt[]
+  model?: NonNullable<RunInput["model"]>
   variant: string | undefined
 }
 
@@ -141,7 +142,8 @@ const layer = Layer.effect(
       return {
         first: session.first,
         history: sessionHistory(session),
-        variant: pickVariant(model, session),
+        model: session.model,
+        variant: pickVariant(model ?? session.model, session),
       }
     })
 

packages/opencode/src/cli/cmd/run/runtime.lifecycle.ts

@@ -12,9 +12,8 @@ import path from "path"
 import { CliRenderEvents, createCliRenderer, type CliRenderer, type ScrollbackWriter } from "@opentui/core"
 import { createDefaultOpenTuiKeymap } from "@opentui/keymap/opentui"
 import { Global } from "@opencode-ai/core/global"
-import { openEditor } from "@opencode-ai/tui/editor"
 import { registerOpencodeKeymap } from "@opencode-ai/tui/keymap"
-import { Session as SessionApi } from "@/session/session"
+import { isDefaultTitle } from "@/session/title"
 import * as Locale from "@/util/locale"
 import { resolveInteractiveStdin } from "./runtime.stdin"
 import { entrySplash, exitSplash, splashMeta } from "./splash"
@@ -64,7 +63,7 @@ export type LifecycleInput = {
   agent: string | undefined
   model: RunInput["model"]
   variant: string | undefined
-  tuiConfig: RunTuiConfig
+  tuiConfig: RunTuiConfig | Promise<RunTuiConfig>
   backgroundSubagents: boolean
   onPermissionReply: (input: PermissionReply) => void | Promise<void>
   onQuestionReply: (input: QuestionReply) => void | Promise<void>
@@ -108,7 +107,7 @@ function shutdown(renderer: CliRenderer): void {
 }
 
 function splashInfo(title: string | undefined, history: RunPrompt[]) {
-  if (title && !SessionApi.isDefaultTitle(title)) {
+  if (title && !isDefaultTitle(title)) {
     return {
       title,
       showSession: true,
@@ -124,17 +123,9 @@ function splashInfo(title: string | undefined, history: RunPrompt[]) {
 
 function footerLabels(input: Pick<RunInput, "agent" | "model" | "variant">): FooterLabels {
   const agentLabel = Locale.titlecase(input.agent ?? "build")
-
-  if (!input.model) {
-    return {
-      agentLabel,
-      modelLabel: "Model default",
-    }
-  }
-
   return {
     agentLabel,
-    modelLabel: formatModelLabel(input.model, input.variant),
+    modelLabel: input.model ? formatModelLabel(input.model, input.variant) : "",
   }
 }
 
@@ -176,6 +167,7 @@ function queueSplash(
 // the entry splash, RunFooter takes over the footer region.
 export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lifecycle> {
   const source = resolveInteractiveStdin()
+  const footerTask = import("./footer")
   let unregisterKeymap: (() => void) | undefined
 
   try {
@@ -194,10 +186,10 @@ export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lif
       consoleMode: "disabled",
       clearOnShutdown: false,
     })
-    const theme = await resolveRunTheme(renderer)
+    const [theme, tuiConfig] = await Promise.all([resolveRunTheme(renderer), input.tuiConfig])
     renderer.setBackgroundColor(theme.background)
     const keymap = createDefaultOpenTuiKeymap(renderer)
-    unregisterKeymap = registerOpencodeKeymap(keymap, renderer, input.tuiConfig)
+    unregisterKeymap = registerOpencodeKeymap(keymap, renderer, tuiConfig)
     const state: SplashState = {
       entry: false,
       exit: false,
@@ -212,7 +204,6 @@ export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lif
       model: input.model,
       variant: input.variant,
     })
-    const footerTask = import("./footer")
     const wrote = queueSplash(
       renderer,
       state,
@@ -244,9 +235,9 @@ export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lif
       theme,
       wrote,
       keymap,
-      tuiConfig: input.tuiConfig,
+      tuiConfig,
       backgroundSubagents: input.backgroundSubagents,
-      diffStyle: input.tuiConfig.diff_style ?? "auto",
+      diffStyle: tuiConfig.diff_style ?? "auto",
       onPermissionReply: input.onPermissionReply,
       onQuestionReply: input.onQuestionReply,
       onQuestionReject: input.onQuestionReject,
@@ -260,6 +251,7 @@ export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lif
           return
         }
 
+        const { openEditor } = await import("@opencode-ai/tui/editor")
         await renderer.idle().catch(() => {})
         const ignore = () => {}
         detachSigint()

packages/opencode/src/cli/cmd/run/runtime.ts

@@ -15,8 +15,7 @@
 import { createOpencodeClient } from "@opencode-ai/sdk/v2"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { MessageID } from "@/session/schema"
-import { loadRunAgents, loadRunCommands, loadRunReferences } from "./catalog.shared"
-import { createRunDemo } from "./demo"
+import { loadRunAgents, loadRunCommands, loadRunReferences, waitForDefaultModel } from "./catalog.shared"
 import { resolveModelInfo, resolveModelInfoStrict, resolveRunTuiConfig, resolveSessionInfo } from "./runtime.boot"
 import { createRuntimeLifecycle } from "./runtime.lifecycle"
 import { trace } from "./trace"
@@ -91,6 +90,8 @@ type StreamState = {
   handle: Awaited<ReturnType<StreamTransportModule["createSessionTransport"]>>
 }
 
+type RunDemo = ReturnType<(typeof import("./demo"))["createRunDemo"]>
+
 type ResolvedSession = {
   sessionID: string
   sessionTitle?: string
@@ -130,7 +131,7 @@ type RuntimeState = {
   sessionTitle?: string
   agent: string | undefined
   switching?: Promise<void>
-  demo?: ReturnType<typeof createRunDemo>
+  demo?: RunDemo
   selectSubagent?: (sessionID: string | undefined) => void
   session?: Promise<void>
   stream?: Promise<StreamState>
@@ -181,21 +182,21 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
   const log = trace()
   const tuiConfigTask = resolveRunTuiConfig()
   const ctx = await input.boot()
-  const modelTask = resolveModelInfo(ctx.sdk, ctx.directory, ctx.model)
   const sessionTask =
     ctx.resume === true
       ? resolveSessionInfo(ctx.sdk, ctx.sessionID, ctx.model)
       : Promise.resolve({
           first: true,
           history: [],
+          model: undefined,
           variant: undefined,
         })
   const savedTask = resolveSavedVariant(ctx.model)
-  const [tuiConfig, session, savedVariant] = await Promise.all([tuiConfigTask, sessionTask, savedTask])
+  const [session, savedVariant] = await Promise.all([sessionTask, savedTask])
   const state: RuntimeState = {
     shown: !session.first,
     aborting: false,
-    model: ctx.model,
+    model: ctx.model ?? session.model,
     providers: [],
     variants: [],
     limits: {},
@@ -206,23 +207,43 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     sessionTitle: ctx.sessionTitle,
     agent: ctx.agent,
   }
-  const ensureSession = () => {
-    if (!input.resolveSession || state.sessionID) {
-      return Promise.resolve()
+  const loadModel = async () => {
+    if (state.model) {
+      return {
+        model: state.model,
+        savedVariant,
+        boot: true,
+        info: await resolveModelInfo(ctx.sdk, ctx.directory, state.model),
+      }
     }
 
-    if (state.session) {
-      return state.session
-    }
-
-    state.session = input.resolveSession(ctx).then((next) => {
-      state.sessionID = next.sessionID
-      state.sessionTitle = next.sessionTitle ?? state.sessionTitle
-      state.agent = next.agent
+    const model = await waitForDefaultModel({
+      sdk: ctx.sdk,
+      directory: ctx.directory,
+      active: () => !footer.isClosed,
     })
-    return state.session
-  }
+    if (footer.isClosed) return
+    const [fallbackSavedVariant, info] = await Promise.all([
+      resolveSavedVariant(model),
+      resolveModelInfo(ctx.sdk, ctx.directory, model),
+    ])
+    if (!model || state.model) {
+      return {
+        model: state.model,
+        savedVariant: undefined,
+        boot: false,
+        info,
+      }
+    }
 
+    state.model = model
+    return {
+      model,
+      savedVariant: fallbackSavedVariant,
+      boot: true,
+      info,
+    }
+  }
   const shell = await (deps.createRuntimeLifecycle ?? createRuntimeLifecycle)({
     directory: ctx.directory,
     findFiles: (query) =>
@@ -240,7 +261,7 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     agent: state.agent,
     model: state.model,
     variant: state.activeVariant,
-    tuiConfig,
+    tuiConfig: tuiConfigTask,
     backgroundSubagents: input.backgroundSubagents,
     onPermissionReply: async (next) => {
       if (state.demo?.permission(next)) {
@@ -345,9 +366,11 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
       }
 
       state.aborting = true
-      void (state.stream
-        ? state.stream.then((item) => item.handle.interruptActiveTurn())
-        : ctx.sdk.v2.session.interrupt({ sessionID: state.sessionID }))
+      void (
+        state.stream
+          ? state.stream.then((item) => item.handle.interruptActiveTurn())
+          : ctx.sdk.v2.session.interrupt({ sessionID: state.sessionID })
+      )
         .catch(() => {})
         .finally(() => {
           state.aborting = false
@@ -374,6 +397,24 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     },
   })
   const footer = shell.footer
+  const firstPaint = footer.idle().catch(() => {})
+  const modelTask = firstPaint.then(() => (footer.isClosed ? undefined : loadModel()))
+  const ensureSession = () => {
+    if (!input.resolveSession || state.sessionID) {
+      return Promise.resolve()
+    }
+
+    if (state.session) {
+      return state.session
+    }
+
+    state.session = input.resolveSession(ctx).then((next) => {
+      state.sessionID = next.sessionID
+      state.sessionTitle = next.sessionTitle ?? state.sessionTitle
+      state.agent = next.agent
+    })
+    return state.session
+  }
   const rememberLocal = (commit: StreamCommit, after?: LocalReplayAnchor) => {
     state.localRows = [...state.localRows, { commit, after }].slice(-LOCAL_REPLAY_ROW_LIMIT)
   }
@@ -417,12 +458,13 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     info: Awaited<ReturnType<typeof resolveModelInfo>>,
     current: string | undefined,
     boot = false,
+    saved = savedVariant,
   ) => {
     state.providers = info.providers
     state.variants = variantsFor(state.providers, state.model)
     state.limits = info.limits
     state.activeVariant = boot
-      ? resolveVariant(ctx.variant, current, savedVariant, state.variants)
+      ? resolveVariant(ctx.variant, current, saved, state.variants)
       : current && !state.variants.includes(current)
         ? undefined
         : current
@@ -430,7 +472,11 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     footer.event({ type: "models", providers: info.providers })
     footer.event({ type: "variants", variants: state.variants, current: state.activeVariant })
     if (state.model)
-      footer.event({ type: "model", model: formatModelLabel(state.model, state.activeVariant, state.providers) })
+      footer.event({
+        type: "model",
+        model: formatModelLabel(state.model, state.activeVariant, state.providers),
+        selection: state.model,
+      })
   }
 
   let catalogRefresh: Promise<void> | undefined
@@ -456,24 +502,24 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     void catalogRefresh.catch(() => {})
   }
 
-  const initialCatalog = footer
-    .idle()
-    .then(loadCatalog)
-    .catch(() => {})
+  const initialCatalog = firstPaint.then(() => (footer.isClosed ? undefined : loadCatalog())).catch(() => {})
   void initialCatalog
 
   if (Flag.OPENCODE_SHOW_TTFD) {
-    footer.append({
-      kind: "system",
-      text: `startup ${Math.max(0, Math.round(performance.now() - start))}ms`,
-      phase: "final",
-      source: "system",
+    void firstPaint.then(() => {
+      if (footer.isClosed) return
+      footer.append({
+        kind: "system",
+        text: `startup ${Math.max(0, Math.round(performance.now() - start))}ms`,
+        phase: "final",
+        source: "system",
+      })
     })
   }
 
-  if (input.demo) {
-    await ensureSession()
-    state.demo = createRunDemo({
+  const createDemo = async () => {
+    const { createRunDemo } = await import("./demo")
+    return createRunDemo({
       footer,
       sessionID: state.sessionID,
       thinking: input.thinking,
@@ -481,13 +527,35 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     })
   }
 
-  if (input.afterPaint) {
-    void Promise.resolve(input.afterPaint(ctx)).catch(() => {})
+  if (input.demo) {
+    await firstPaint
+    if (!footer.isClosed) {
+      await ensureSession()
+      state.demo = await createDemo()
+    }
   }
 
-  void modelTask.then((info) => applyModelInfo(info, session.variant, true))
+  if (input.afterPaint) {
+    void firstPaint.then(() => (footer.isClosed ? undefined : input.afterPaint?.(ctx))).catch(() => {})
+  }
 
-  const streamTask = deps.streamTransport ?? import("./stream-v2.transport")
+  void modelTask.then((result) => {
+    if (!result) return
+    const current = state.model
+    const boot =
+      result.boot &&
+      !!current &&
+      current.providerID === result.model?.providerID &&
+      current.modelID === result.model.modelID
+    applyModelInfo(result.info, boot ? session.variant : state.activeVariant, boot, result.savedVariant)
+  })
+
+  let streamTask = deps.streamTransport
+  const loadStreamTransport = () => {
+    if (streamTask) return streamTask
+    streamTask = import("./stream-v2.transport")
+    return streamTask
+  }
   const ensureStream = () => {
     if (state.stream) {
       return state.stream
@@ -501,7 +569,7 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
         throw new Error("runtime closed")
       }
 
-      const mod = await streamTask
+      const mod = await loadStreamTransport()
       if (footer.isClosed) {
         throw new Error("runtime closed")
       }
@@ -570,6 +638,8 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
   })
 
   const runQueue = async () => {
+    await firstPaint
+    if (footer.isClosed) return
     let includeFiles = true
     if (state.demo) {
       await state.demo.start()
@@ -615,14 +685,7 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
               state.history = []
               state.localRows = []
               includeFiles = true
-              state.demo = input.demo
-                ? createRunDemo({
-                    footer,
-                    sessionID: state.sessionID,
-                    thinking: input.thinking,
-                    limits: () => state.limits,
-                  })
-                : undefined
+              state.demo = input.demo ? await createDemo() : undefined
               log?.write("session.new", {
                 sessionID: state.sessionID,
               })
@@ -727,6 +790,8 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
   try {
     const eager = eagerStream(input, ctx)
     if (eager) {
+      await firstPaint
+      if (footer.isClosed) return
       if (input.replay && state.shown) {
         // Replay commits immutable scrollback rows, so wait for provider names
         // before bootstrapping existing session history.
@@ -737,13 +802,15 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     }
 
     if (!eager && input.resolveSession) {
-      queueMicrotask(() => {
-        if (footer.isClosed) {
-          return
-        }
+      void firstPaint
+        .then(() => {
+          if (footer.isClosed) {
+            return
+          }
 
-        void ensureStream().catch(() => {})
-      })
+          return ensureStream()
+        })
+        .catch(() => {})
     }
 
     try {

packages/opencode/src/cli/cmd/run/scrollback.surface.ts

@@ -105,7 +105,7 @@ export class RunScrollbackStream {
   ) {
     this.diffStyle = options.diffStyle
     this.sessionID = options.sessionID
-    this.treeSitterClient = options.treeSitterClient ?? getTreeSitterClient()
+    this.treeSitterClient = options.treeSitterClient
     this.wrote = options.wrote ?? false
     this.onThemeRelease = options.onThemeRelease
   }
@@ -151,6 +151,7 @@ export class RunScrollbackStream {
       startOnNewLine: entryFlags(commit).startOnNewLine,
     })
     const style = entryLook(commit, this.theme.entry)
+    const treeSitterClient = body.type === "text" ? undefined : (this.treeSitterClient ??= getTreeSitterClient())
     const renderable =
       body.type === "text"
         ? new TextRenderable(surface.renderContext, {
@@ -170,7 +171,7 @@ export class RunScrollbackStream {
               drawUnstyledText: false,
               streaming: true,
               fg: entryColor(commit, this.theme),
-              treeSitterClient: this.treeSitterClient,
+              treeSitterClient,
             })
           : new MarkdownRenderable(surface.renderContext, {
               content: "",
@@ -180,7 +181,7 @@ export class RunScrollbackStream {
               internalBlockMode: "top-level",
               tableOptions: { widthMode: "content" },
               fg: entryColor(commit, this.theme),
-              treeSitterClient: this.treeSitterClient,
+              treeSitterClient,
             })
 
     surface.root.add(renderable)

packages/opencode/src/cli/cmd/run/session.shared.ts

@@ -20,6 +20,8 @@ type Turn = {
 export type RunSession = {
   first: boolean
   turns: Turn[]
+  model?: NonNullable<RunInput["model"]>
+  variant?: string
 }
 
 function fileName(url: string, filename?: string) {
@@ -157,9 +159,11 @@ export async function resolveCurrentSession(
   sessionID: string,
   limit = LIMIT,
 ): Promise<RunSession> {
-  const response = await sdk.v2.session.messages({ sessionID, limit, order: "desc" }, { throwOnError: true })
+  const [response, session] = await Promise.all([
+    sdk.v2.session.messages({ sessionID, limit, order: "desc" }, { throwOnError: true }),
+    sdk.v2.session.get({ sessionID }, { throwOnError: true }),
+  ])
   const messages = response.data.data.toReversed()
-  const session = await sdk.v2.session.get({ sessionID }, { throwOnError: true })
   return {
     first: messages.length === 0,
     turns: messages.flatMap((message) => {
@@ -197,6 +201,13 @@ export async function resolveCurrentSession(
         },
       ]
     }),
+    ...(session.data.data.model && {
+      model: {
+        providerID: session.data.data.model.providerID,
+        modelID: session.data.data.model.id,
+      },
+      variant: session.data.data.model.variant,
+    }),
   }
 }
 
@@ -223,6 +234,10 @@ export function sessionVariant(session: RunSession, model: RunInput["model"]): s
     return undefined
   }
 
+  if (session.model?.providerID === model.providerID && session.model.modelID === model.modelID) {
+    return session.variant
+  }
+
   for (let idx = session.turns.length - 1; idx >= 0; idx -= 1) {
     const turn = session.turns[idx]
     if (turn.provider !== model.providerID || turn.model !== model.modelID) {

packages/opencode/src/cli/cmd/run/types.ts

@@ -312,6 +312,7 @@ export type FooterEvent =
   | {
       type: "model"
       model: string
+      selection: NonNullable<RunInput["model"]>
     }
   | {
       type: "turn.send"

packages/opencode/src/session/session.ts

@@ -1,3 +1,6 @@
+export { isDefaultTitle } from "./title"
+import { createDefaultTitle } from "./title"
+
 import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { PermissionV1 } from "@opencode-ai/core/v1/permission"
 import { Slug } from "@opencode-ai/core/util/slug"
@@ -43,15 +46,6 @@ import { ProviderV2 } from "@opencode-ai/core/provider"
 import { ModelV2 } from "@opencode-ai/core/model"
 import { SessionMessage } from "@opencode-ai/schema/session-message"
 
-const parentTitlePrefix = "New session - "
-const childTitlePrefix = "Child session - "
-
-export function isDefaultTitle(title: string) {
-  return new RegExp(
-    `^(${parentTitlePrefix}|${childTitlePrefix})\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$`,
-  ).test(title)
-}
-
 type SessionRow = typeof SessionTable.$inferSelect
 
 export function fromRow(row: SessionRow): Info {
@@ -518,7 +512,7 @@ const layer: Layer.Layer<
         path: input.path,
         workspaceID: input.workspaceID,
         parentID: input.parentID,
-        title: input.title ?? (input.parentID ? childTitlePrefix : parentTitlePrefix) + new Date().toISOString(),
+        title: input.title ?? createDefaultTitle(!!input.parentID),
         agent: input.agent,
         model: input.model,
         metadata: input.metadata,

packages/opencode/src/session/title.ts

@@ -0,0 +1,11 @@
+const parentTitlePrefix = "New session - "
+const childTitlePrefix = "Child session - "
+const defaultTitle = /^(New session - |Child session - )\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/
+
+export function createDefaultTitle(child: boolean) {
+  return (child ? childTitlePrefix : parentTitlePrefix) + new Date().toISOString()
+}
+
+export function isDefaultTitle(title: string) {
+  return defaultTitle.test(title)
+}

packages/opencode/test/cli/run/catalog.shared.test.ts

@@ -1,12 +1,37 @@
 import { afterEach, describe, expect, mock, spyOn, test } from "bun:test"
 import { OpencodeClient } from "@opencode-ai/sdk/v2"
-import { loadRunReferences, runProviders } from "@/cli/cmd/run/catalog.shared"
+import { loadRunReferences, runProviders, waitForDefaultModel } from "@/cli/cmd/run/catalog.shared"
 
 afterEach(() => {
   mock.restore()
 })
 
 describe("run catalog shared", () => {
+  test("resolves the catalog-selected model for the footer", async () => {
+    const client = new OpencodeClient()
+    const selected = spyOn(client.v2.model, "default").mockImplementation(
+      () =>
+        Promise.resolve({
+          data: {
+            location: { directory: "/tmp", project: { id: "proj_1", directory: "/tmp" } },
+            data: {
+              id: "gpt-5",
+              providerID: "openai",
+            },
+          },
+          error: undefined,
+          request: new Request("https://opencode.test"),
+          response: new Response(),
+        }) as never,
+    )
+
+    await expect(waitForDefaultModel({ sdk: client, directory: "/tmp" })).resolves.toEqual({
+      providerID: "openai",
+      modelID: "gpt-5",
+    })
+    expect(selected).toHaveBeenCalledWith({ location: { directory: "/tmp" } }, { throwOnError: true })
+  })
+
   test("loads visible project references from the current reference catalog", async () => {
     const client = new OpencodeClient()
     const list = spyOn(client.v2.reference, "list").mockImplementation(

packages/opencode/test/cli/run/runtime.test.ts

@@ -113,6 +113,7 @@ describe("run interactive runtime", () => {
   test("waits for provider metadata before eager replay transport bootstrap", async () => {
     const providersStarted = defer<void>()
     const providers = defer<void>()
+    const lifecycleModels: unknown[] = []
 
     const sdk = new OpencodeClient()
     const legacyProviders = spyOn(sdk.config, "providers").mockRejectedValue(new Error("legacy providers should stay unused"))
@@ -249,23 +250,23 @@ describe("run interactive runtime", () => {
         replay: true,
         replayLimit: 100,
         agent: "build",
-        model: {
-          providerID: "openai",
-          modelID: "gpt-5",
-        },
+        model: undefined,
         variant: undefined,
         files: [],
         thinking: true,
         backgroundSubagents: false,
       },
       {
-        createRuntimeLifecycle: async () => ({
-          footer: footer(),
-          onResize: () => () => {},
-          refreshTheme: () => {},
-          resetForReplay: () => Promise.resolve(),
-          close: () => Promise.resolve(),
-        }),
+        createRuntimeLifecycle: async (input) => {
+          lifecycleModels.push(input.model)
+          return {
+            footer: footer(),
+            onResize: () => () => {},
+            refreshTheme: () => {},
+            resetForReplay: () => Promise.resolve(),
+            close: () => Promise.resolve(),
+          }
+        },
         streamTransport: Promise.resolve({
           createSessionTransport: async (input: { providers?: () => RunProvider[]; footer: FooterApi }) => {
             transportProviders.push(input.providers?.() ?? [])
@@ -293,12 +294,156 @@ describe("run interactive runtime", () => {
 
     await task
 
+    expect(lifecycleModels).toEqual([{ providerID: "openai", modelID: "gpt-5" }])
     expect(transportProviders).toEqual([[provider]])
     expect(legacyProviders).not.toHaveBeenCalled()
     expect(legacyAgents).not.toHaveBeenCalled()
     expect(legacyCommands).not.toHaveBeenCalled()
   })
 
+  test("defers catalog-selected model resolution until after first paint", async () => {
+    const sdk = new OpencodeClient()
+    const defaultStarted = defer<void>()
+    const releaseDefault = defer<void>()
+    const lifecycleStarted = defer<void>()
+    const painted = defer<void>()
+    const modelShown = defer<void>()
+    let defaultRequested = false
+    const events: FooterEvent[] = []
+    const api = footer(events)
+    api.idle = () => painted.promise
+    const event = api.event
+    api.event = (value) => {
+      event(value)
+      if (value.type !== "model") return
+      modelShown.resolve()
+      api.close()
+    }
+
+    spyOn(sdk.v2.model, "default").mockImplementation(async () => {
+      defaultRequested = true
+      defaultStarted.resolve()
+      await releaseDefault.promise
+      return ok({
+        location: { directory: "/tmp" },
+        data: { id: "gpt-5", providerID: "openai" },
+      }) as never
+    })
+    spyOn(sdk.v2.provider, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+    spyOn(sdk.v2.model, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+    spyOn(sdk.v2.agent, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+    spyOn(sdk.v2.reference, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+    spyOn(sdk.v2.command, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+    spyOn(sdk.v2.skill, "list").mockImplementation(() =>
+      ok({ location: { directory: "/tmp" }, data: [] }) as never,
+    )
+
+    const task = runInteractiveMode(
+      {
+        sdk,
+        directory: "/tmp",
+        sessionID: "ses-fresh",
+        resume: false,
+        agent: "build",
+        model: undefined,
+        variant: undefined,
+        files: [],
+        thinking: false,
+        backgroundSubagents: false,
+      },
+      {
+        createRuntimeLifecycle: async (input) => {
+          expect(input.model).toBeUndefined()
+          lifecycleStarted.resolve()
+          return {
+            footer: api,
+            onResize: () => () => {},
+            refreshTheme: () => {},
+            resetForReplay: () => Promise.resolve(),
+            close: () => Promise.resolve(),
+          }
+        },
+        streamTransport: Promise.resolve({
+          createSessionTransport: async () => ({
+            runPromptTurn: async () => {},
+            interruptActiveTurn: async () => {},
+            selectSubagent: () => {},
+            replayOnResize: async () => false,
+            close: async () => {},
+          }),
+          formatUnknownError: (error: unknown) => (error instanceof Error ? error.message : String(error)),
+        }),
+      },
+    )
+
+    await lifecycleStarted.promise
+    expect(defaultRequested).toBe(false)
+    painted.resolve()
+    await defaultStarted.promise
+    releaseDefault.resolve()
+    await modelShown.promise
+    await task
+
+    expect(events.find((event) => event.type === "model")).toEqual({
+      type: "model",
+      model: "gpt-5 · openai",
+      selection: { providerID: "openai", modelID: "gpt-5" },
+    })
+  })
+
+  test("does not start deferred work after the footer closes", async () => {
+    const sdk = new OpencodeClient()
+    const lifecycleStarted = defer<void>()
+    const painted = defer<void>()
+    const api = footer()
+    api.idle = () => painted.promise
+    const defaultModel = spyOn(sdk.v2.model, "default")
+
+    const task = runInteractiveMode(
+      {
+        sdk,
+        directory: "/tmp",
+        sessionID: "ses-closed",
+        resume: false,
+        agent: "build",
+        model: undefined,
+        variant: undefined,
+        files: [],
+        thinking: false,
+        backgroundSubagents: false,
+      },
+      {
+        createRuntimeLifecycle: async () => {
+          lifecycleStarted.resolve()
+          return {
+            footer: api,
+            onResize: () => () => {},
+            refreshTheme: () => {},
+            resetForReplay: () => Promise.resolve(),
+            close: () => Promise.resolve(),
+          }
+        },
+      },
+    )
+
+    await lifecycleStarted.promise
+    api.close()
+    painted.resolve()
+    await task
+
+    expect(defaultModel).not.toHaveBeenCalled()
+  })
+
   test("retains last-known-good state across failed coalesced refreshes and retries later", async () => {
     const sdk = new OpencodeClient()
     const refreshGate = defer<void>()

packages/opencode/test/cli/run/session.shared.test.ts

@@ -303,6 +303,8 @@ describe("run session shared", () => {
 
     const out = await resolveCurrentSession(client, "ses_1")
 
+    expect(out.model).toEqual({ providerID: "openai", modelID: "gpt-5" })
+    expect(out.variant).toBe("high")
     expect(out.turns[0]?.prompt).toEqual({
       text: "Review @note.ts",
       parts: [

packages/tui/package.json

@@ -31,6 +31,7 @@
     "./terminal-win32": "./src/terminal-win32.ts",
     "./config/keybind": "./src/config/keybind.ts",
     "./keymap": "./src/keymap.tsx",
+    "./prompt/content": "./src/prompt/content.ts",
     "./prompt/display": "./src/prompt/display.ts",
     "./plugin/runtime": "./src/plugin/runtime.tsx",
     "./plugin/slots": "./src/plugin/slots.tsx",

packages/tui/src/editor.ts

@@ -7,22 +7,10 @@ import { spawn } from "node:child_process"
 import type { Stream } from "node:stream"
 import { resolveZedDbPath, resolveZedSelection } from "./editor-zed"
 
+export { normalizePromptContent } from "./prompt/content"
+
 type EditorStdio = "inherit" | "pipe" | "ignore" | number | Stream
 
-export function normalizePromptContent(content: string) {
-  if (content.endsWith("\r\n")) {
-    const body = content.slice(0, -2)
-    return !body.includes("\n") && !body.includes("\r") ? body : content
-  }
-
-  if (content.endsWith("\n")) {
-    const body = content.slice(0, -1)
-    return !body.includes("\n") && !body.includes("\r") ? body : content
-  }
-
-  return content
-}
-
 export async function openEditor(input: { value: string; renderer: CliRenderer; cwd?: string; stdin?: EditorStdio }) {
   const editor = process.env.VISUAL || process.env.EDITOR
   if (!editor) return

packages/tui/src/prompt/content.ts

@@ -0,0 +1,13 @@
+export function normalizePromptContent(content: string) {
+  if (content.endsWith("\r\n")) {
+    const body = content.slice(0, -2)
+    return !body.includes("\n") && !body.includes("\r") ? body : content
+  }
+
+  if (content.endsWith("\n")) {
+    const body = content.slice(0, -1)
+    return !body.includes("\n") && !body.includes("\r") ? body : content
+  }
+
+  return content
+}