From f44d35dd9c2cefb287c432f64623b69286b5f855 Mon Sep 17 00:00:00 2001
From: Kelvin Amoaba <97001695+AmoabaKelvin@users.noreply.github.com>
Date: Tue, 13 Oct 2026 16:36:57 +0000
Subject: [PATCH 1/4] fix(opencode): stop asking OpenCode 2.x for a model list
 it does not have

Every 2.x release rejects `opencode models --verbose`, and its own listings are empty before 2.0.27 and can omit providers that report after startup. The early listing now applies to the 1.x line only; on 2.x the chat's own list fills the picker.
---
 src/main/acp/acp-launch-specs.ts              | 22 ++++++++++--------
 src/main/acp/acp-model-catalog-probe.test.ts  | 18 ++++++++++++++-
 src/main/acp/acp-model-catalog-probe.ts       | 23 +++++++++++--------
 .../acp/acp-structured-launch-resolution.ts   |  2 +-
 .../opencode-model-catalog-listing.ts         |  5 ++--
 5 files changed, 48 insertions(+), 22 deletions(-)

diff --git a/src/main/acp/acp-launch-specs.ts b/src/main/acp/acp-launch-specs.ts
index 7083bef1115b..b12bfadf309d 100644
--- a/src/main/acp/acp-launch-specs.ts
+++ b/src/main/acp/acp-launch-specs.ts
@@ -58,6 +58,9 @@ export type AcpModelDiscovery =
       args: readonly string[]
       parse(stdout: string): AgentSessionModelOption[]
       listingNamesConfiguredModel: boolean
+      /** The releases whose listing matches what their chats offer; any other runs none, and its
+       *  chats' own lists fill the catalog. Absent lists on every release. */
+      supportsVersion?(version: string): boolean
     }
   | { kind: 'unavailable'; reason: string }
 
@@ -142,15 +145,13 @@ const GROK_LAUNCH_SPEC: AcpLaunchSpec = {
   sessionHistory: GROK_SESSION_HISTORY
 }
 
+// The release the recorded sessions capture.
+const OPENCODE_1X_LINE = { major: 1, floor: '1.18.31' } as const
+// The 2.x release verified to start the private child below.
+const OPENCODE_2X_LINE = { major: 2, floor: '2.0.14' } as const
+
 // `opencode acp` on 1.x serves in-process; on 2.x it starts a private `opencode serve --stdio` child
 // with this environment and ends it with stdin, so both lines run the chat's own account.
-const OPENCODE_ACP_RELEASE_LINES = [
-  // The release the recorded sessions capture.
-  { major: 1, floor: '1.18.31' },
-  // The 2.x release verified to start that private child.
-  { major: 2, floor: '2.0.14' }
-] as const
-
 const OPENCODE_LAUNCH_SPEC: AcpLaunchSpec = {
   agent: 'opencode',
   command: 'opencode',
@@ -165,7 +166,7 @@ const OPENCODE_LAUNCH_SPEC: AcpLaunchSpec = {
   account: openCodeAcpAccountBinding(),
   installDirectories: ({ homePath }) => [join(homePath, '.opencode', 'bin')],
   supportsVersion: (version) =>
-    OPENCODE_ACP_RELEASE_LINES.some((line) => isStableCliVersionOnLine(version, line)),
+    [OPENCODE_1X_LINE, OPENCODE_2X_LINE].some((line) => isStableCliVersionOnLine(version, line)),
   imagePrompts: true,
   readStoredUserMessages: openCodeStoredUserMessagesReader(),
   // Its `initialize` names no models and `session/new` stores a session; the listing does neither.
@@ -174,7 +175,10 @@ const OPENCODE_LAUNCH_SPEC: AcpLaunchSpec = {
     args: OPENCODE_MODEL_LISTING_ARGS,
     parse: parseOpenCodeModelListing,
     // The listing marks no default; a chat started with no pick names it.
-    listingNamesConfiguredModel: false
+    listingNamesConfiguredModel: false,
+    // 2.x rejects `--verbose`; its own listings are empty before 2.0.27 and then omit providers
+    // that report after startup.
+    supportsVersion: (version) => isStableCliVersionOnLine(version, OPENCODE_1X_LINE)
   },
   visualsSkill: loadOpenCodeVisualsSkill,
   compaction: true,
diff --git a/src/main/acp/acp-model-catalog-probe.test.ts b/src/main/acp/acp-model-catalog-probe.test.ts
index 7afa57e763ac..b3b313f06837 100644
--- a/src/main/acp/acp-model-catalog-probe.test.ts
+++ b/src/main/acp/acp-model-catalog-probe.test.ts
@@ -158,7 +158,7 @@ describe('ACP model catalog probes', () => {
       resolveEnvironment: async () => ({ PATH: '/usr/bin', HOME: '/home/user' }),
       dataDirectory: '/orca-data',
       resolveCommand: () => '/opt/opencode/bin/opencode',
-      probeVersion: async () => true,
+      probeVersion: async (_launch, supports) => supports('1.18.35'),
       homePath: '/home/user',
       runListing,
       connect
@@ -178,6 +178,22 @@ describe('ACP model catalog probes', () => {
     ])
   })
 
+  // Every 2.x release rejects `--verbose`, and its other listings miss what its chats offer.
+  it('runs no listing command on OpenCode 2.x, whose chats list its models', async () => {
+    const runListing = vi.fn(async () => '')
+    const probe = createAcpModelCatalogProbe(OPENCODE, {
+      resolveEnvironment: async () => ({ PATH: '/usr/bin', HOME: '/home/user' }),
+      resolveCommand: () => '/opt/opencode/bin/opencode',
+      probeVersion: async (_launch, supports) => supports('2.0.28'),
+      homePath: '/home/user',
+      runListing
+    })
+    await expect(probe({ kind: 'opencode', locator: { kind: 'unmanaged' } })).rejects.toThrow(
+      /lists its models only through its chats/
+    )
+    expect(runListing).not.toHaveBeenCalled()
+  })
+
   it('lists nothing for a release that runs no structured chat', async () => {
     const runListing = vi.fn()
     const probe = createAcpModelCatalogProbe(OPENCODE, {
diff --git a/src/main/acp/acp-model-catalog-probe.ts b/src/main/acp/acp-model-catalog-probe.ts
index e2dae8600188..be214c9e85bc 100644
--- a/src/main/acp/acp-model-catalog-probe.ts
+++ b/src/main/acp/acp-model-catalog-probe.ts
@@ -13,7 +13,7 @@ import type { AgentSessionModelOption } from '../../shared/agent-session-wire'
 import { createAcpAgentConnection } from './acp-agent-connection'
 import type { AcpLaunchSpec } from './acp-launch-specs'
 import {
-  acpLaunchVersionSupported,
+  probeAcpLaunchVersion,
   resolveAcpLaunchInvocation,
   type AcpLaunchInvocationDeps
 } from './acp-structured-launch-resolution'
@@ -35,7 +35,8 @@ export type AcpModelCatalogProbeDeps = AcpLaunchInvocationDeps & {
 
 /**
  * Lists an ACP agent's models without a session, under the binary, account and scrubbed
- * environment its chats launch with. A release that runs no structured chat lists nothing.
+ * environment its chats launch with. A release that runs no structured chat lists nothing, nor does
+ * one whose listing its chats' own lists do not match.
  */
 export function createAcpModelCatalogProbe(
   spec: AcpLaunchSpec,
@@ -53,15 +54,19 @@ export function createAcpModelCatalogProbe(
       ...deps,
       resolveWorkingDirectory: () => cwd
     })
-    if (
-      !(await acpLaunchVersionSupported(
-        spec,
-        { command, cwd, env },
-        deps.probeVersion ?? probeAgentCliVersion
-      ))
-    ) {
+    const listsVersion = discovery.kind === 'command' ? discovery.supportsVersion : undefined
+    const release = await probeAcpLaunchVersion(
+      spec,
+      { command, cwd, env },
+      listsVersion !== undefined,
+      deps.probeVersion ?? probeAgentCliVersion
+    )
+    if (!release.supported) {
       throw new Error(`${spec.agent} at ${command} does not run structured chats`)
     }
+    if (listsVersion && (release.version === null || !listsVersion(release.version))) {
+      throw new Error(`${spec.agent} at ${command} lists its models only through its chats`)
+    }
     let models: AgentSessionModelOption[]
     if (discovery.kind === 'command') {
       const stdout = await (deps.runListing ?? runAgentModelCatalogListing)(
diff --git a/src/main/acp/acp-structured-launch-resolution.ts b/src/main/acp/acp-structured-launch-resolution.ts
index 4330c67c81ef..96044c762c3f 100644
--- a/src/main/acp/acp-structured-launch-resolution.ts
+++ b/src/main/acp/acp-structured-launch-resolution.ts
@@ -145,7 +145,7 @@ export function resolveAcpLaunchCommand(
 
 /** Whether `command` is a release the spec runs a structured chat on (true when it names none),
  *  and the version it printed. Asked only when the spec names releases or `wantVersion`. */
-async function probeAcpLaunchVersion(
+export async function probeAcpLaunchVersion(
   spec: AcpLaunchSpec,
   launch: { command: string; cwd: string; env: Record<string, string> },
   wantVersion: boolean,
diff --git a/src/main/opencode/opencode-model-catalog-listing.ts b/src/main/opencode/opencode-model-catalog-listing.ts
index 7f667cf3a498..452d23c3f0a6 100644
--- a/src/main/opencode/opencode-model-catalog-listing.ts
+++ b/src/main/opencode/opencode-model-catalog-listing.ts
@@ -1,5 +1,6 @@
-// OpenCode's session-free model listing: `opencode models --verbose` prints each `provider/model` id
-// on its own line, followed by that model's metadata as indented JSON closed by a bare `}` line.
+// OpenCode 1.x's session-free model listing: `opencode models --verbose` prints each
+// `provider/model` id on its own line, followed by that model's metadata as indented JSON closed by
+// a bare `}` line.
 
 import { z } from 'zod'
 import type { AgentSessionModelOption } from '../../shared/agent-session-wire'

From eb897069a894bb07fb56f880e89fa1e6b4850ef6 Mon Sep 17 00:00:00 2001
From: Kelvin Amoaba <97001695+AmoabaKelvin@users.noreply.github.com>
Date: Thu, 15 Oct 2026 13:40:54 +0000
Subject: [PATCH 2/4] feat(opencode): list OpenCode 2.x models through a
 session it opens and deletes

2.x has no listing command that matches its chats, but a new session reports exactly what a chat offers. The catalog probe now opens one, reads its models and deletes it with session/delete. A release that cannot delete a session is not asked, so no empty conversation is left; 1.x keeps its models --verbose listing.
---
 src/main/acp/acp-launch-specs.ts             |  25 +++--
 src/main/acp/acp-model-catalog-probe.test.ts | 109 ++++++++++++++++---
 src/main/acp/acp-model-catalog-probe.ts      |  87 ++++++++++++---
 src/main/acp/acp-session-runtime.ts          |   3 +
 4 files changed, 185 insertions(+), 39 deletions(-)

diff --git a/src/main/acp/acp-launch-specs.ts b/src/main/acp/acp-launch-specs.ts
index b12bfadf309d..4f16159bf106 100644
--- a/src/main/acp/acp-launch-specs.ts
+++ b/src/main/acp/acp-launch-specs.ts
@@ -39,8 +39,9 @@ import { OPENCODE_TRANSCRIPT_IMPORT } from '../opencode/opencode-transcript-impo
 import { OMP_SESSION_HISTORY } from '../omp/omp-session-history'
 import { OMP_TRANSCRIPT_IMPORT } from '../omp/omp-transcript-import'
 
-/** How an agent lists its models without a session: from its `initialize` answer (plus extension
- *  requests), from a listing command, or not at all. Never `authenticate` or `session/new`. */
+/** How an agent lists its models before a chat: from its `initialize` answer (plus extension
+ *  requests), from a listing command, from a session it opens and deletes, or not at all. Never
+ *  `authenticate`. */
 export type AcpModelDiscovery =
   | {
       kind: 'initialize'
@@ -58,9 +59,17 @@ export type AcpModelDiscovery =
       args: readonly string[]
       parse(stdout: string): AgentSessionModelOption[]
       listingNamesConfiguredModel: boolean
-      /** The releases whose listing matches what their chats offer; any other runs none, and its
-       *  chats' own lists fill the catalog. Absent lists on every release. */
+      /** The releases whose listing matches what their chats offer; any other lists the way
+       *  `otherReleases` names, else not at all and its chats' own lists fill the catalog. Absent
+       *  lists on every release. */
       supportsVersion?(version: string): boolean
+      otherReleases?: 'session'
+    }
+  | {
+      /** What a new chat offers, read from a session the listing then deletes. An agent that
+       *  cannot delete one is not asked, so no empty conversation is left in its history. */
+      kind: 'session'
+      listingNamesConfiguredModel: boolean
     }
   | { kind: 'unavailable'; reason: string }
 
@@ -169,16 +178,16 @@ const OPENCODE_LAUNCH_SPEC: AcpLaunchSpec = {
     [OPENCODE_1X_LINE, OPENCODE_2X_LINE].some((line) => isStableCliVersionOnLine(version, line)),
   imagePrompts: true,
   readStoredUserMessages: openCodeStoredUserMessagesReader(),
-  // Its `initialize` names no models and `session/new` stores a session; the listing does neither.
+  // Its `initialize` names no models; 1.x lists them with a command, 2.x in a session it deletes.
   modelDiscovery: {
     kind: 'command',
     args: OPENCODE_MODEL_LISTING_ARGS,
     parse: parseOpenCodeModelListing,
     // The listing marks no default; a chat started with no pick names it.
     listingNamesConfiguredModel: false,
-    // 2.x rejects `--verbose`; its own listings are empty before 2.0.27 and then omit providers
-    // that report after startup.
-    supportsVersion: (version) => isStableCliVersionOnLine(version, OPENCODE_1X_LINE)
+    // 2.x rejects `--verbose`, and its own listings omit providers that report after startup.
+    supportsVersion: (version) => isStableCliVersionOnLine(version, OPENCODE_1X_LINE),
+    otherReleases: 'session'
   },
   visualsSkill: loadOpenCodeVisualsSkill,
   compaction: true,
diff --git a/src/main/acp/acp-model-catalog-probe.test.ts b/src/main/acp/acp-model-catalog-probe.test.ts
index b3b313f06837..10a21ab3366c 100644
--- a/src/main/acp/acp-model-catalog-probe.test.ts
+++ b/src/main/acp/acp-model-catalog-probe.test.ts
@@ -1,4 +1,4 @@
-import { afterEach, describe, expect, it, vi } from 'vitest'
+import { afterEach, describe, expect, it, vi, type Mock } from 'vitest'
 import { acpLaunchSpecFor, type AcpLaunchSpec } from './acp-launch-specs'
 import {
   createAcpModelCatalogProbe,
@@ -90,6 +90,67 @@ function scriptedGrok(initializeMeta: Record<string, unknown>): {
   }
 }
 
+function scriptedOpenCode2(canDelete: boolean): {
+  agent: AcpScriptedAgent
+  launches: ProviderProcessLaunch[]
+  deps: AcpModelCatalogProbeDeps & {
+    runListing: Mock<NonNullable<AcpModelCatalogProbeDeps['runListing']>>
+  }
+} {
+  const agent = new AcpScriptedAgent()
+  agents.push(agent)
+  agent.on('initialize', (frame) =>
+    agent.reply(frame, {
+      protocolVersion: 1,
+      agentCapabilities: {
+        sessionCapabilities: canDelete ? { delete: {} } : {}
+      }
+    })
+  )
+  agent.on('session/new', (frame) =>
+    agent.reply(frame, {
+      sessionId: 'probe-session',
+      configOptions: [
+        {
+          id: 'model',
+          name: 'Model',
+          category: 'model',
+          type: 'select',
+          currentValue: 'opencode/exo-free',
+          options: [
+            { value: 'opencode/big-pickle', name: 'Big Pickle' },
+            { value: 'opencode/exo-free', name: 'Exo Free' }
+          ]
+        }
+      ]
+    })
+  )
+  agent.on('session/delete', (frame) => agent.reply(frame, {}))
+  const launches: ProviderProcessLaunch[] = []
+  return {
+    agent,
+    launches,
+    deps: {
+      resolveEnvironment: async () => ({ PATH: '/usr/bin', HOME: '/home/user' }),
+      resolveCommand: () => '/opt/opencode/bin/opencode',
+      probeVersion: async (_launch, supports) => supports('2.0.29'),
+      homePath: '/home/user',
+      dataDirectory: '/orca-data',
+      runListing: vi.fn<NonNullable<AcpModelCatalogProbeDeps['runListing']>>(),
+      connectSession: (launch) => {
+        launches.push(launch)
+        const runtime = new AcpSessionRuntime(agent.stdout, agent.stdin)
+        return {
+          initialize: () => runtime.initialize(),
+          start: (options) => runtime.start(options),
+          deleteSession: (sessionId) => runtime.deleteSession(sessionId),
+          close: async () => runtime.close()
+        }
+      }
+    }
+  }
+}
+
 describe('ACP model catalog probes', () => {
   it('lists Grok from initialize alone, under its pinned account, and closes the child', async () => {
     const { agent, deps, launches, closed } = scriptedGrok({ modelState: MODEL_STATE })
@@ -178,20 +239,40 @@ describe('ACP model catalog probes', () => {
     ])
   })
 
-  // Every 2.x release rejects `--verbose`, and its other listings miss what its chats offer.
-  it('runs no listing command on OpenCode 2.x, whose chats list its models', async () => {
-    const runListing = vi.fn(async () => '')
-    const probe = createAcpModelCatalogProbe(OPENCODE, {
-      resolveEnvironment: async () => ({ PATH: '/usr/bin', HOME: '/home/user' }),
-      resolveCommand: () => '/opt/opencode/bin/opencode',
-      probeVersion: async (_launch, supports) => supports('2.0.28'),
-      homePath: '/home/user',
-      runListing
+  // Every 2.x release rejects `--verbose`, and its own listings omit providers that report late.
+  it('lists OpenCode 2.x from a session it opens and deletes, with no listing command', async () => {
+    const { agent, deps, launches } = scriptedOpenCode2(true)
+    const success = await createAcpModelCatalogProbe(
+      OPENCODE,
+      deps
+    )({
+      kind: 'opencode',
+      locator: { kind: 'unmanaged' }
     })
-    await expect(probe({ kind: 'opencode', locator: { kind: 'unmanaged' } })).rejects.toThrow(
-      /lists its models only through its chats/
-    )
-    expect(runListing).not.toHaveBeenCalled()
+    expect(agent.frames.map((frame) => frame.method)).toEqual([
+      'initialize',
+      'session/new',
+      'session/delete'
+    ])
+    expect(agent.frames[1]!.params).toMatchObject({ cwd: '/home/user' })
+    expect(agent.frames[2]!.params).toEqual({ sessionId: 'probe-session' })
+    expect(launches).toEqual([expect.objectContaining({ args: ['acp'] })])
+    expect(deps.runListing).not.toHaveBeenCalled()
+    expect(success.models.map((model) => [model.id, model.label])).toEqual([
+      ['opencode/big-pickle', 'Big Pickle'],
+      ['opencode/exo-free', 'Exo Free']
+    ])
+  })
+
+  it('opens no session on an OpenCode 2.x that cannot delete one', async () => {
+    const { agent, deps } = scriptedOpenCode2(false)
+    await expect(
+      createAcpModelCatalogProbe(
+        OPENCODE,
+        deps
+      )({ kind: 'opencode', locator: { kind: 'unmanaged' } })
+    ).rejects.toThrow(/cannot delete a session/)
+    expect(agent.frames.map((frame) => frame.method)).toEqual(['initialize'])
   })
 
   it('lists nothing for a release that runs no structured chat', async () => {
diff --git a/src/main/acp/acp-model-catalog-probe.ts b/src/main/acp/acp-model-catalog-probe.ts
index be214c9e85bc..8cdd0e06567b 100644
--- a/src/main/acp/acp-model-catalog-probe.ts
+++ b/src/main/acp/acp-model-catalog-probe.ts
@@ -11,12 +11,14 @@ import {
 import type { ProviderProcessLaunch } from '../provider-process/provider-process-launch'
 import type { AgentSessionModelOption } from '../../shared/agent-session-wire'
 import { createAcpAgentConnection } from './acp-agent-connection'
-import type { AcpLaunchSpec } from './acp-launch-specs'
+import type { AcpLaunchSpec, AcpModelDiscovery } from './acp-launch-specs'
+import type { AcpSessionStarted, AcpSessionStartOptions } from './acp-session-setup'
 import {
   probeAcpLaunchVersion,
   resolveAcpLaunchInvocation,
   type AcpLaunchInvocationDeps
 } from './acp-structured-launch-resolution'
+import { AcpStructuredOptions } from './acp-structured-options'
 import type { InitializeResponse } from './generated/acp-protocol.generated'
 
 /** The part of an ACP connection a session-free listing may use: no session method is reachable. */
@@ -26,17 +28,27 @@ export type AcpModelCatalogConnection = {
   close(): Promise<unknown>
 }
 
+/** A connection that may open one session, to read what a new chat offers, and delete it. */
+export type AcpModelCatalogSessionConnection = Omit<
+  AcpModelCatalogConnection,
+  'requestSessionFreeExtension'
+> & {
+  start(options: AcpSessionStartOptions): Promise<AcpSessionStarted>
+  deleteSession(sessionId: string): Promise<unknown>
+}
+
 export type AcpModelCatalogProbeDeps = AcpLaunchInvocationDeps & {
   /** Test seams; production spawns through the shared supervised runner and ACP connection. */
   probeVersion?: typeof probeAgentCliVersion
   connect?: (launch: ProviderProcessLaunch) => AcpModelCatalogConnection
+  connectSession?: (launch: ProviderProcessLaunch) => AcpModelCatalogSessionConnection
   runListing?: typeof runAgentModelCatalogListing
 }
 
 /**
- * Lists an ACP agent's models without a session, under the binary, account and scrubbed
- * environment its chats launch with. A release that runs no structured chat lists nothing, nor does
- * one whose listing its chats' own lists do not match.
+ * Lists an ACP agent's models before a chat, under the binary, account and scrubbed environment its
+ * chats launch with. A release that runs no structured chat lists nothing, nor does one its
+ * discovery names no listing for.
  */
 export function createAcpModelCatalogProbe(
   spec: AcpLaunchSpec,
@@ -64,28 +76,36 @@ export function createAcpModelCatalogProbe(
     if (!release.supported) {
       throw new Error(`${spec.agent} at ${command} does not run structured chats`)
     }
-    if (listsVersion && (release.version === null || !listsVersion(release.version))) {
+    const listing = listingFor(discovery, release.version)
+    if (listing === null) {
       throw new Error(`${spec.agent} at ${command} lists its models only through its chats`)
     }
+    const launch = {
+      command,
+      args: spec.args({ fullAccess: false, pluginDir: null }),
+      cwd,
+      env,
+      envToDelete
+    }
+    const run = { label: spec.agent, signal: options?.signal }
     let models: AgentSessionModelOption[]
-    if (discovery.kind === 'command') {
+    if (listing.kind === 'command') {
       const stdout = await (deps.runListing ?? runAgentModelCatalogListing)(
-        { command, args: [...discovery.args], cwd, env, envToDelete },
+        { command, args: [...listing.args], cwd, env, envToDelete },
         { site: `${spec.agent}-model-catalog-probe`, signal: options?.signal }
       )
-      models = discovery.parse(stdout)
+      models = listing.parse(stdout)
+    } else if (listing.kind === 'session') {
+      models = await runAgentModelCatalogSession(
+        () => (deps.connectSession ?? createAcpAgentConnection)(launch),
+        (connection) => readSessionModels(spec, connection, cwd),
+        run
+      )
     } else {
-      const launch = {
-        command,
-        args: spec.args({ fullAccess: false, pluginDir: null }),
-        cwd,
-        env,
-        envToDelete
-      }
       models = await runAgentModelCatalogSession(
         () => (deps.connect ?? createAcpAgentConnection)(launch),
-        async (connection) => discovery.read(await connection.initialize(), connection),
-        { label: spec.agent, signal: options?.signal }
+        async (connection) => listing.read(await connection.initialize(), connection),
+        run
       )
     }
     if (models.length === 0) {
@@ -94,3 +114,36 @@ export function createAcpModelCatalogProbe(
     return { models, origin: 'probe' }
   }
 }
+
+type AcpModelListing = Exclude<AcpModelDiscovery, { kind: 'unavailable' }>
+
+/** How `version` lists: its discovery, unless that is a command this release has no listing for. */
+function listingFor(discovery: AcpModelListing, version: string | null): AcpModelListing | null {
+  if (discovery.kind !== 'command' || !discovery.supportsVersion) {
+    return discovery
+  }
+  if (version !== null && discovery.supportsVersion(version)) {
+    return discovery
+  }
+  return discovery.otherReleases === 'session'
+    ? { kind: 'session', listingNamesConfiguredModel: discovery.listingNamesConfiguredModel }
+    : null
+}
+
+/** What a new chat in `cwd` offers, read from a session opened only to be deleted. */
+async function readSessionModels(
+  spec: AcpLaunchSpec,
+  connection: AcpModelCatalogSessionConnection,
+  cwd: string
+): Promise<AgentSessionModelOption[]> {
+  const initialized = await connection.initialize()
+  if (!initialized.agentCapabilities?.sessionCapabilities?.delete) {
+    throw new Error(`${spec.agent} cannot delete a session, so it lists its models only in chats`)
+  }
+  const started = await connection.start({ cwd, mcpServers: [] })
+  // A failed delete leaves one empty conversation behind; the models it listed are still right.
+  await connection.deleteSession(started.sessionId).catch(() => undefined)
+  const options = new AcpStructuredOptions(spec.dialect)
+  options.adoptSession(started.response, 'new')
+  return options.read().models
+}
diff --git a/src/main/acp/acp-session-runtime.ts b/src/main/acp/acp-session-runtime.ts
index 8cfd4bbaf425..2f58f6fae860 100644
--- a/src/main/acp/acp-session-runtime.ts
+++ b/src/main/acp/acp-session-runtime.ts
@@ -152,6 +152,9 @@ export class AcpSessionRuntime {
     return (await this.call('session/fork', params, ForkSessionResponseSchema)).sessionId
   }
 
+  /** Deletes saved session `sessionId` (`session/delete`). Ask only an agent that advertises it. */
+  deleteSession = (sessionId: string) => this.call('session/delete', { sessionId }, z.unknown())
+
   start(options: AcpSessionStartOptions): Promise<AcpSessionStarted> {
     if (this.started) {
       return Promise.resolve(this.started)

From 1b15064733c8298fd2c7c48485872728a86ed28f Mon Sep 17 00:00:00 2001
From: Kelvin Amoaba <97001695+AmoabaKelvin@users.noreply.github.com>
Date: Thu, 15 Oct 2026 15:39:18 +0000
Subject: [PATCH 3/4] fix(opencode): open the model-list session in the asking
 chat's folder

OpenCode 2 records a project for every folder a session opens in, so the throwaway session in the home folder left a home-folder project in OpenCode's list. The session now opens in the folder of the chat that asked, as bb does; a startup or settings refresh has no chat, so it skips the listing without counting as a failure.
---
 src/main/acp/acp-launch-specs.ts              | 22 +++++------
 src/main/acp/acp-model-catalog-probe.test.ts  | 31 ++++++++++-----
 src/main/acp/acp-model-catalog-probe.ts       | 17 +++++----
 .../agent-model-catalog-failures.ts           |  4 ++
 .../agent-model-catalog-prewarm.test.ts       | 38 +++++++++++++++++++
 .../agent-model-catalog-service.ts            | 13 ++++---
 .../agent-model-catalog-store.ts              |  7 ++--
 7 files changed, 96 insertions(+), 36 deletions(-)

diff --git a/src/main/acp/acp-launch-specs.ts b/src/main/acp/acp-launch-specs.ts
index 4f16159bf106..3db522eb0133 100644
--- a/src/main/acp/acp-launch-specs.ts
+++ b/src/main/acp/acp-launch-specs.ts
@@ -59,20 +59,20 @@ export type AcpModelDiscovery =
       args: readonly string[]
       parse(stdout: string): AgentSessionModelOption[]
       listingNamesConfiguredModel: boolean
-      /** The releases whose listing matches what their chats offer; any other lists the way
-       *  `otherReleases` names, else not at all and its chats' own lists fill the catalog. Absent
-       *  lists on every release. */
+      /** The releases whose listing matches what their chats offer; any other lists through
+       *  `otherReleases`, else not at all and its chats' own lists fill the catalog. Absent lists
+       *  on every release. */
       supportsVersion?(version: string): boolean
-      otherReleases?: 'session'
-    }
-  | {
-      /** What a new chat offers, read from a session the listing then deletes. An agent that
-       *  cannot delete one is not asked, so no empty conversation is left in its history. */
-      kind: 'session'
-      listingNamesConfiguredModel: boolean
+      otherReleases?: AcpSessionModelDiscovery
     }
+  | AcpSessionModelDiscovery
   | { kind: 'unavailable'; reason: string }
 
+/** What a new chat offers, read from a session opened in the asking chat's folder and then
+ *  deleted, as bb does. An agent that cannot delete one is not asked, and with no chat folder (a
+ *  prewarm) none is opened, so no conversation or new project is left in its history. */
+export type AcpSessionModelDiscovery = { kind: 'session'; listingNamesConfiguredModel: boolean }
+
 export type AcpLaunchSpec = {
   /** The Orca agent id, which names the agent's records, its catalog label and its settings. */
   agent: TuiAgent
@@ -187,7 +187,7 @@ const OPENCODE_LAUNCH_SPEC: AcpLaunchSpec = {
     listingNamesConfiguredModel: false,
     // 2.x rejects `--verbose`, and its own listings omit providers that report after startup.
     supportsVersion: (version) => isStableCliVersionOnLine(version, OPENCODE_1X_LINE),
-    otherReleases: 'session'
+    otherReleases: { kind: 'session', listingNamesConfiguredModel: false }
   },
   visualsSkill: loadOpenCodeVisualsSkill,
   compaction: true,
diff --git a/src/main/acp/acp-model-catalog-probe.test.ts b/src/main/acp/acp-model-catalog-probe.test.ts
index 10a21ab3366c..ee33e01a5b8b 100644
--- a/src/main/acp/acp-model-catalog-probe.test.ts
+++ b/src/main/acp/acp-model-catalog-probe.test.ts
@@ -6,6 +6,7 @@ import {
 } from './acp-model-catalog-probe'
 import { AcpSessionRuntime } from './acp-session-runtime'
 import { AcpScriptedAgent } from './acp-scripted-agent.test-support'
+import { AgentModelCatalogListingDeferredError } from '../native-chat/agent-model-catalog/agent-model-catalog-failures'
 import type { ProviderProcessLaunch } from '../provider-process/provider-process-launch'
 import { openCodeAcpAccountBinding } from '../opencode/opencode-structured-account-home'
 
@@ -242,19 +243,17 @@ describe('ACP model catalog probes', () => {
   // Every 2.x release rejects `--verbose`, and its own listings omit providers that report late.
   it('lists OpenCode 2.x from a session it opens and deletes, with no listing command', async () => {
     const { agent, deps, launches } = scriptedOpenCode2(true)
-    const success = await createAcpModelCatalogProbe(
-      OPENCODE,
-      deps
-    )({
-      kind: 'opencode',
-      locator: { kind: 'unmanaged' }
-    })
+    const success = await createAcpModelCatalogProbe(OPENCODE, deps)(
+      { kind: 'opencode', locator: { kind: 'unmanaged' } },
+      { workspacePath: '/work/project' }
+    )
     expect(agent.frames.map((frame) => frame.method)).toEqual([
       'initialize',
       'session/new',
       'session/delete'
     ])
-    expect(agent.frames[1]!.params).toMatchObject({ cwd: '/home/user' })
+    // In the asking chat's folder, so OpenCode records no project the person never opened.
+    expect(agent.frames[1]!.params).toMatchObject({ cwd: '/work/project' })
     expect(agent.frames[2]!.params).toEqual({ sessionId: 'probe-session' })
     expect(launches).toEqual([expect.objectContaining({ args: ['acp'] })])
     expect(deps.runListing).not.toHaveBeenCalled()
@@ -266,13 +265,25 @@ describe('ACP model catalog probes', () => {
 
   it('opens no session on an OpenCode 2.x that cannot delete one', async () => {
     const { agent, deps } = scriptedOpenCode2(false)
+    await expect(
+      createAcpModelCatalogProbe(OPENCODE, deps)(
+        { kind: 'opencode', locator: { kind: 'unmanaged' } },
+        { workspacePath: '/work/project' }
+      )
+    ).rejects.toThrow(/cannot delete a session/)
+    expect(agent.frames.map((frame) => frame.method)).toEqual(['initialize'])
+  })
+
+  it('opens no session on OpenCode 2.x without a chat folder, as at a prewarm', async () => {
+    const { agent, deps, launches } = scriptedOpenCode2(true)
     await expect(
       createAcpModelCatalogProbe(
         OPENCODE,
         deps
       )({ kind: 'opencode', locator: { kind: 'unmanaged' } })
-    ).rejects.toThrow(/cannot delete a session/)
-    expect(agent.frames.map((frame) => frame.method)).toEqual(['initialize'])
+    ).rejects.toBeInstanceOf(AgentModelCatalogListingDeferredError)
+    expect(launches).toEqual([])
+    expect(agent.frames).toEqual([])
   })
 
   it('lists nothing for a release that runs no structured chat', async () => {
diff --git a/src/main/acp/acp-model-catalog-probe.ts b/src/main/acp/acp-model-catalog-probe.ts
index 8cdd0e06567b..6a94e82748e6 100644
--- a/src/main/acp/acp-model-catalog-probe.ts
+++ b/src/main/acp/acp-model-catalog-probe.ts
@@ -8,6 +8,7 @@ import {
   runAgentModelCatalogListing,
   runAgentModelCatalogSession
 } from '../native-chat/agent-model-catalog/agent-model-catalog-probe-runner'
+import { AgentModelCatalogListingDeferredError } from '../native-chat/agent-model-catalog/agent-model-catalog-failures'
 import type { ProviderProcessLaunch } from '../provider-process/provider-process-launch'
 import type { AgentSessionModelOption } from '../../shared/agent-session-wire'
 import { createAcpAgentConnection } from './acp-agent-connection'
@@ -96,9 +97,13 @@ export function createAcpModelCatalogProbe(
       )
       models = listing.parse(stdout)
     } else if (listing.kind === 'session') {
+      const workspace = options?.workspacePath
+      if (!workspace) {
+        throw new AgentModelCatalogListingDeferredError(`${spec.agent} lists in a chat's folder`)
+      }
       models = await runAgentModelCatalogSession(
         () => (deps.connectSession ?? createAcpAgentConnection)(launch),
-        (connection) => readSessionModels(spec, connection, cwd),
+        (connection) => readSessionModels(spec, connection, workspace),
         run
       )
     } else {
@@ -125,22 +130,20 @@ function listingFor(discovery: AcpModelListing, version: string | null): AcpMode
   if (version !== null && discovery.supportsVersion(version)) {
     return discovery
   }
-  return discovery.otherReleases === 'session'
-    ? { kind: 'session', listingNamesConfiguredModel: discovery.listingNamesConfiguredModel }
-    : null
+  return discovery.otherReleases ?? null
 }
 
-/** What a new chat in `cwd` offers, read from a session opened only to be deleted. */
+/** What a new chat in `workspace` offers, read from a session opened only to be deleted. */
 async function readSessionModels(
   spec: AcpLaunchSpec,
   connection: AcpModelCatalogSessionConnection,
-  cwd: string
+  workspace: string
 ): Promise<AgentSessionModelOption[]> {
   const initialized = await connection.initialize()
   if (!initialized.agentCapabilities?.sessionCapabilities?.delete) {
     throw new Error(`${spec.agent} cannot delete a session, so it lists its models only in chats`)
   }
-  const started = await connection.start({ cwd, mcpServers: [] })
+  const started = await connection.start({ cwd: workspace, mcpServers: [] })
   // A failed delete leaves one empty conversation behind; the models it listed are still right.
   await connection.deleteSession(started.sessionId).catch(() => undefined)
   const options = new AcpStructuredOptions(spec.dialect)
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-failures.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-failures.ts
index 7da3c68d6800..c711a870d267 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-failures.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-failures.ts
@@ -10,6 +10,10 @@ export const AGENT_MODEL_CATALOG_FAILURE_TTL_MS = 30_000
 /** A probe the host stopped (it is going away): says nothing about the account, so it is not held. */
 export class AgentModelCatalogListingStoppedError extends Error {}
 
+/** A listing that runs only in a chat's folder, asked with none (a prewarm): like a stopped probe,
+ *  it says nothing about the account. */
+export class AgentModelCatalogListingDeferredError extends AgentModelCatalogListingStoppedError {}
+
 export type AgentModelCatalogFailure = {
   /** Set by the store's own refreshes; the fingerprint is a hash, so expiry by agent reads it. */
   agent?: string
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
index 290313f8f658..f9943e6cdd6a 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
@@ -6,6 +6,7 @@ import {
   agentModelCatalogFingerprintForRecord,
   agentModelCatalogSessionAccess
 } from './agent-model-catalog-fingerprint'
+import { AgentModelCatalogListingDeferredError } from './agent-model-catalog-failures'
 import { createAgentModelCatalogService } from './agent-model-catalog-service'
 import {
   AGENT_MODEL_CATALOG_FRESH_MS,
@@ -96,6 +97,43 @@ describe('model catalog prewarm', () => {
     expect(grok).toHaveBeenCalledTimes(2)
   })
 
+  // OpenCode 2.x lists in a session opened in the chat's folder; a prewarm has no chat.
+  it('hands a read its chat folder, and lets a listing that needs one skip the prewarm', async () => {
+    const store = new AgentModelCatalogStore()
+    const probe = vi.fn(
+      async (_home: AgentSessionAccountHome, options?: { workspacePath?: string }) => {
+        if (!options?.workspacePath) {
+          throw new AgentModelCatalogListingDeferredError('lists in a chat folder')
+        }
+        return listing('big-pickle')
+      }
+    )
+    const service = createAgentModelCatalogService({
+      store,
+      getRecord: () => undefined,
+      drivesRecord: () => true,
+      hasChatRecords: () => true,
+      resolveAccountHome: async () => HOME('OPENCODE_HOME', '/homes/a'),
+      probes: { opencode2: probe }
+    })
+
+    await service.prewarm()
+    expect(probe).toHaveBeenCalledWith(HOME('OPENCODE_HOME', '/homes/a'), {
+      signal: expect.any(AbortSignal)
+    })
+    // Not held as a failure: the first chat lists at once, in its own folder.
+    const read = await service.read({
+      agent: 'opencode2',
+      workspacePath: '/work/project',
+      waitForListing: true
+    })
+    expect(probe).toHaveBeenLastCalledWith(HOME('OPENCODE_HOME', '/homes/a'), {
+      signal: expect.any(AbortSignal),
+      workspacePath: '/work/project'
+    })
+    expect(read.origin).toBe('probe')
+  })
+
   it('lists the new account after a switch and leaves the old account’s catalog alone', async () => {
     const store = new AgentModelCatalogStore()
     let selected = '/homes/a'
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
index de5a5c26b60c..4424a405cbfb 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
@@ -210,9 +210,9 @@ export function createAgentModelCatalogService(
   // answers after it, so the chat that reported it is followed by an answer naming it.
   const recordingDefaults = new Map<string, Promise<void>>()
   const listWith =
-    (probe: AgentModelCatalogProbe, home: AgentSessionAccountHome) =>
+    (probe: AgentModelCatalogProbe, home: AgentSessionAccountHome, workspacePath?: string) =>
     (): Promise<AgentModelCatalogSuccess> =>
-      probe(home, { signal: lifetime.signal }).catch((error: unknown) => {
+      probe(home, { signal: lifetime.signal, workspacePath }).catch((error: unknown) => {
         throw lifetime.signal.aborted
           ? new AgentModelCatalogListingStoppedError(String(error))
           : error
@@ -247,6 +247,9 @@ export function createAgentModelCatalogService(
           ? await sessionWorkspacePath(deps, record)
           : null
         : params.workspacePath
+      // A listing that opens a session opens it in this chat's folder.
+      const list = (probe: AgentModelCatalogProbe, home: AgentSessionAccountHome) =>
+        listWith(probe, home, workspacePath ?? undefined)
       await recordingDefaults.get(fingerprint)
       let entry = deps.store.get(fingerprint)
       const probe = deps.probes?.[params.agent]
@@ -280,7 +283,7 @@ export function createAgentModelCatalogService(
       // Past its TTL, only the probe re-derives a held reason. The reason is served meanwhile;
       // only a read that asks waits for the probe's answer.
       if (probe && home && !lifetime.signal.aborted && deps.store.heldReasonDue(fingerprint)) {
-        const probing = deps.store.refresh(fingerprint, params.agent, probe, listWith(probe, home))
+        const probing = deps.store.refresh(fingerprint, params.agent, probe, list(probe, home))
         if (!params.waitForListing) {
           return answer(entry, { listingInProgress: true })
         }
@@ -291,9 +294,9 @@ export function createAgentModelCatalogService(
       let listing = !entry && home ? deps.store.pendingListing(fingerprint) : null
       if (probe && home && !lifetime.signal.aborted) {
         if (entry && deps.store.shouldRefresh(fingerprint)) {
-          void deps.store.refresh(fingerprint, params.agent, probe, listWith(probe, home))
+          void deps.store.refresh(fingerprint, params.agent, probe, list(probe, home))
         } else if (!entry && !listing && !deps.store.hasActiveFailure(fingerprint)) {
-          void deps.store.refresh(fingerprint, params.agent, probe, listWith(probe, home))
+          void deps.store.refresh(fingerprint, params.agent, probe, list(probe, home))
           listing = deps.store.pendingListing(fingerprint)
         }
       }
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-store.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-store.ts
index 6a2a6e58192b..d9d4cddac167 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-store.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-store.ts
@@ -48,11 +48,12 @@ export type { AgentModelCatalogFailure }
 export const AGENT_MODEL_CATALOG_FRESH_MS = 10 * 60_000
 export const AGENT_MODEL_CATALOG_MAX_ENTRIES = 256
 
-/** Lists an agent's models without a session, under the account a launch would pin. `signal`
- *  stops the listing and its child once the host that asked is going away. */
+/** Lists an agent's models before a chat, under the account a launch would pin. `signal` stops
+ *  the listing and its child once the host that asked is going away; `workspacePath` is the folder
+ *  of the chat that asked, where a listing that opens a session runs. */
 export type AgentModelCatalogProbe = (
   accountHome: AgentSessionAccountHome,
-  options?: { signal?: AbortSignal }
+  options?: { signal?: AbortSignal; workspacePath?: string }
 ) => Promise<AgentModelCatalogSuccess>
 
 /** Who lists, by identity: a live session's per-spawn handle, or the session-less probe. */

From 706c31591839cc336c7babef3e936053d2d1ed91 Mon Sep 17 00:00:00 2001
From: Kelvin Amoaba <97001695+AmoabaKelvin@users.noreply.github.com>
Date: Thu, 15 Oct 2026 21:05:53 +0000
Subject: [PATCH 4/4] fix(opencode): never prewarm a model list that needs a
 chat's folder

A picker opened during a startup refresh joined a listing that had no chat folder to open its session in, so it was answered with no models. Registrations now mark a listing that runs in the asking chat's folder, and the prewarm skips it, so the picker's own read lists in its folder. bb likewise keeps its folder-less prewarm apart from folder reads.
---
 .../agent-model-catalog-discovery.ts          |  3 ++
 .../agent-model-catalog-prewarm.test.ts       | 41 +++++++++++++++++++
 .../agent-model-catalog-service.ts            |  6 ++-
 ...ured-agent-model-catalog-discovery.test.ts |  9 ++++
 ...tructured-agent-model-catalog-discovery.ts |  3 ++
 .../structured-agent-model-catalog-wiring.ts  |  7 +++-
 6 files changed, 67 insertions(+), 2 deletions(-)

diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-discovery.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-discovery.ts
index a2c2ff6b8e42..7cf639474972 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-discovery.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-discovery.ts
@@ -13,5 +13,8 @@ export type AgentModelCatalogDiscovery =
       /** The listing marks the model the account is configured to run as its default, so a new
        *  chat launches the listed default. False where the agent's own settings may pick another. */
       listingNamesConfiguredModel: boolean
+      /** The listing opens a session in the asking chat's folder, so a prewarm, which has no chat,
+       *  never runs it and a picker never waits on one that cannot list. */
+      listsInChatFolder?: true
     }
   | { kind: 'unavailable'; reason: string }
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
index f9943e6cdd6a..3ef2a33b563f 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-prewarm.test.ts
@@ -134,6 +134,47 @@ describe('model catalog prewarm', () => {
     expect(read.origin).toBe('probe')
   })
 
+  // A picker that joined a prewarm listing with no chat folder was answered nothing at all.
+  it('never prewarms a listing that runs in a chat folder, so a picker lists in its own', async () => {
+    const store = new AgentModelCatalogStore()
+    const versionChecked = deferred<void>()
+    const probe = vi.fn(
+      async (_home: AgentSessionAccountHome, options?: { workspacePath?: string }) => {
+        await versionChecked.promise
+        if (!options?.workspacePath) {
+          throw new AgentModelCatalogListingDeferredError('lists in a chat folder')
+        }
+        return listing('big-pickle')
+      }
+    )
+    const service = createAgentModelCatalogService({
+      store,
+      getRecord: () => undefined,
+      drivesRecord: () => true,
+      hasChatRecords: () => true,
+      resolveAccountHome: async () => HOME('OPENCODE_HOME', '/homes/a'),
+      probes: { opencode2: probe },
+      listsInChatFolder: new Set(['opencode2'])
+    })
+
+    const prewarmed = service.prewarm()
+    const opened = await service.read({ agent: 'opencode2', workspacePath: '/work/project' })
+    const waited = service.read({
+      agent: 'opencode2',
+      workspacePath: '/work/project',
+      waitForListing: true
+    })
+    versionChecked.resolve()
+    await prewarmed
+    expect(opened).toEqual({ origin: 'unknown', listingInProgress: true })
+    expect((await waited).origin).toBe('probe')
+    expect(probe).toHaveBeenCalledTimes(1)
+    expect(probe).toHaveBeenCalledWith(HOME('OPENCODE_HOME', '/homes/a'), {
+      signal: expect.any(AbortSignal),
+      workspacePath: '/work/project'
+    })
+  })
+
   it('lists the new account after a switch and leaves the old account’s catalog alone', async () => {
     const store = new AgentModelCatalogStore()
     let selected = '/homes/a'
diff --git a/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts b/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
index 4424a405cbfb..e40c97d1aeb0 100644
--- a/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
+++ b/src/main/native-chat/agent-model-catalog/agent-model-catalog-service.ts
@@ -33,6 +33,8 @@ export type AgentModelCatalogServiceDeps = {
   probes?: Readonly<Partial<Record<string, AgentModelCatalogProbe>>>
   /** Agents whose listing marks the model the account is configured to run as its default. */
   listingNamesConfiguredModel?: ReadonlySet<string>
+  /** Agents whose listing runs in the asking chat's folder; a prewarm skips them. */
+  listsInChatFolder?: ReadonlySet<string>
   /** Where a session's provider runs, for deciding whether its own config scope is the account's. */
   recordWorkspacePath?: (record: AgentSessionRecord) => Promise<string | null>
   /** False for an agent whose model no project config can pick; its default holds everywhere. */
@@ -346,7 +348,9 @@ export function createAgentModelCatalogService(
       const probes = deps.probes ?? {}
       // An agent never used here waits for its first chat, which shows the quiet placeholder.
       const used = Object.keys(probes).filter(
-        (agent) => deps.store.hasEntryForAgent(agent) || deps.hasChatRecords?.(agent) === true
+        (agent) =>
+          !deps.listsInChatFolder?.has(agent) &&
+          (deps.store.hasEntryForAgent(agent) || deps.hasChatRecords?.(agent) === true)
       )
       await runBounded(used, PREWARM_CONCURRENCY, lifetime.signal, async (agent) => {
         const probe = probes[agent]
diff --git a/src/main/runtime/structured-agent-model-catalog-discovery.test.ts b/src/main/runtime/structured-agent-model-catalog-discovery.test.ts
index 31608a4ff3db..b4f8dab3b0f0 100644
--- a/src/main/runtime/structured-agent-model-catalog-discovery.test.ts
+++ b/src/main/runtime/structured-agent-model-catalog-discovery.test.ts
@@ -82,6 +82,15 @@ describe('the model catalog contract on every registration', () => {
     expect([...listingNamesConfiguredModel].sort()).toEqual(['codex'])
   })
 
+  // OpenCode 2.x lists in a session opened in the chat's folder, which a prewarm does not have.
+  it('marks the agents whose listing runs in a chat folder', () => {
+    const { listsInChatFolder } = registeredModelCatalogDiscovery(
+      STRUCTURED_AGENT_RUNTIME_REGISTRATIONS,
+      context()
+    )
+    expect([...listsInChatFolder].sort()).toEqual(['opencode'])
+  })
+
   it('maps an ACP agent with no session-free listing to an unavailable registration', () => {
     const spec = acpLaunchSpecFor('grok')!
     const discovery = acpModelCatalogDiscovery(
diff --git a/src/main/runtime/structured-agent-model-catalog-discovery.ts b/src/main/runtime/structured-agent-model-catalog-discovery.ts
index 632339b57f88..ac9ecab6f3e9 100644
--- a/src/main/runtime/structured-agent-model-catalog-discovery.ts
+++ b/src/main/runtime/structured-agent-model-catalog-discovery.ts
@@ -64,9 +64,12 @@ export function acpModelCatalogDiscovery(
   if (discovery.kind === 'unavailable') {
     return { kind: 'unavailable', reason: discovery.reason }
   }
+  const listsInSession =
+    discovery.kind === 'session' || (discovery.kind === 'command' && discovery.otherReleases)
   return {
     kind: 'probe',
     listingNamesConfiguredModel: discovery.listingNamesConfiguredModel,
+    ...(listsInSession ? { listsInChatFolder: true as const } : {}),
     probe: createAcpModelCatalogProbe(spec, {
       resolveEnvironment: environment.resolveBaseEnvironment,
       refreshEnvironmentAfterMiss: environment.refreshAfterMissingProgram,
diff --git a/src/main/runtime/structured-agent-model-catalog-wiring.ts b/src/main/runtime/structured-agent-model-catalog-wiring.ts
index f72f5eb4b4f8..83cb796ba488 100644
--- a/src/main/runtime/structured-agent-model-catalog-wiring.ts
+++ b/src/main/runtime/structured-agent-model-catalog-wiring.ts
@@ -47,9 +47,11 @@ export function registeredModelCatalogDiscovery(
 ): {
   probes: Record<string, AgentModelCatalogProbe>
   listingNamesConfiguredModel: Set<string>
+  listsInChatFolder: Set<string>
 } {
   const probes: Record<string, AgentModelCatalogProbe> = {}
   const listingNamesConfiguredModel = new Set<string>()
+  const listsInChatFolder = new Set<string>()
   for (const registration of registrations) {
     const { agent } = registration.definition
     const discovery = registration.modelCatalog(context)
@@ -58,9 +60,12 @@ export function registeredModelCatalogDiscovery(
       if (discovery.listingNamesConfiguredModel) {
         listingNamesConfiguredModel.add(agent)
       }
+      if (discovery.listsInChatFolder) {
+        listsInChatFolder.add(agent)
+      }
     }
   }
-  return { probes, listingNamesConfiguredModel }
+  return { probes, listingNamesConfiguredModel, listsInChatFolder }
 }
 
 /**