feat(opencode): add session workspace directories and searchable add-directory UX.

packages/app/src/context/file.tsx

@@ -195,7 +195,7 @@ export const { use: useFile, provider: FileProvider } = createSimpleContext({
     }
 
     const search = (query: string, dirs: "true" | "false") =>
-      sdk.client.find.files({ query, dirs }).then(
+      sdk.client.find.files({ query, dirs, sessionID: params.id }).then(
         (x) => (x.data ?? []).map(path.normalize),
         () => [],
       )

packages/app/src/i18n/en.ts

@@ -87,6 +87,8 @@ export const dict = {
   "command.session.share.description": "Share this session and copy the URL to clipboard",
   "command.session.unshare": "Unshare session",
   "command.session.unshare.description": "Stop sharing this session",
+  "command.session.directory.add": "Add workspace directory",
+  "command.session.directory.add.description": "Allow another directory for this session",
 
   "palette.search.placeholder": "Search files, commands, and sessions",
   "palette.empty": "No results found",
@@ -428,6 +430,11 @@ export const dict = {
   "toast.session.unshare.success.description": "Session unshared successfully!",
   "toast.session.unshare.failed.title": "Failed to unshare session",
   "toast.session.unshare.failed.description": "An error occurred while unsharing the session",
+  "toast.session.directory.added.title": "Workspace directory added",
+  "toast.session.directory.added.description": "Added {{directory}} to this session",
+  "toast.session.directory.exists.title": "Workspace directory already added",
+  "toast.session.directory.exists.description": "{{directory}} is already available in this session",
+  "toast.session.directory.failed.title": "Failed to add workspace directory",
 
   "toast.session.listFailed.title": "Failed to load sessions for {{project}}",
 

packages/app/src/pages/session/use-session-commands.tsx

@@ -12,6 +12,7 @@ import { useSDK } from "@/context/sdk"
 import { useSync } from "@/context/sync"
 import { useTerminal } from "@/context/terminal"
 import { DialogSelectFile } from "@/components/dialog-select-file"
+import { DialogSelectDirectory } from "@/components/dialog-select-directory"
 import { DialogSelectModel } from "@/components/dialog-select-model"
 import { DialogSelectMcp } from "@/components/dialog-select-mcp"
 import { DialogFork } from "@/components/dialog-fork"
@@ -287,6 +288,75 @@ export const useSessionCommands = (actions: SessionCommandContext) => {
   ])
 
   const sessionActionCommands = createMemo(() => [
+    sessionCommand({
+      id: "session.directory.add",
+      title: language.t("command.session.directory.add"),
+      description: language.t("command.session.directory.add.description"),
+      slash: "add-directory",
+      disabled: !params.id,
+      onSelect: async () => {
+        const sessionID = params.id
+        if (!sessionID) return
+
+        const selected = await new Promise<string | undefined>((resolve) => {
+          const done = (result: string | string[] | null) => {
+            if (Array.isArray(result)) {
+              resolve(result[0])
+              return
+            }
+            resolve(result ?? undefined)
+          }
+          dialog.show(
+            () => <DialogSelectDirectory title={language.t("command.session.directory.add")} onSelect={done} />,
+            () => done(null),
+          )
+        })
+
+        if (!selected) return
+
+        await sdk.client.session
+          .workspaceDirectory({
+            sessionID,
+            path: selected,
+          })
+          .then((res) => {
+            const data = res.data
+            if (!data) {
+              showToast({
+                title: language.t("toast.session.directory.failed.title"),
+                description: language.t("common.requestFailed"),
+                variant: "error",
+              })
+              return
+            }
+
+            if (!data.added) {
+              showToast({
+                title: language.t("toast.session.directory.exists.title"),
+                description: language.t("toast.session.directory.exists.description", {
+                  directory: data.directory,
+                }),
+              })
+              return
+            }
+
+            showToast({
+              title: language.t("toast.session.directory.added.title"),
+              description: language.t("toast.session.directory.added.description", {
+                directory: data.directory,
+              }),
+              variant: "success",
+            })
+          })
+          .catch((error: Error) => {
+            showToast({
+              title: language.t("toast.session.directory.failed.title"),
+              description: error instanceof Error ? error.message : language.t("common.requestFailed"),
+              variant: "error",
+            })
+          })
+      },
+    }),
     sessionCommand({
       id: "session.undo",
       title: language.t("command.session.undo"),

packages/opencode/src/cli/cmd/tui/component/dialog-tag.tsx

@@ -4,7 +4,7 @@ import { useDialog } from "@tui/ui/dialog"
 import { useSDK } from "@tui/context/sdk"
 import { createStore } from "solid-js/store"
 
-export function DialogTag(props: { onSelect?: (value: string) => void }) {
+export function DialogTag(props: { onSelect?: (value: string) => void; sessionID?: string }) {
   const sdk = useSDK()
   const dialog = useDialog()
 
@@ -17,6 +17,7 @@ export function DialogTag(props: { onSelect?: (value: string) => void }) {
     async () => {
       const result = await sdk.client.find.files({
         query: store.filter,
+        sessionID: props.sessionID,
       })
       if (result.error) return []
       const sliced = (result.data ?? []).slice(0, 5)