fix(tui): preserve composer selection under a stationary pointer

packages/app/e2e/regression/tab-navigate-mousedown.spec.ts

@@ -231,92 +231,6 @@ test("vertical tabs show project details, resize, and navigate", async ({ page }
   await expect(tabB).toBeVisible()
 })
 
-for (const direction of ["ltr", "rtl"]) {
-  test(`vertical tabs keep Settings pinned while scrolling in ${direction}`, async ({ page }, testInfo) => {
-    await mockServer(page)
-    await page.addInitScript(
-      ({ server, sessionA, sessionB, directory }) => {
-        localStorage.setItem("settings.v3", JSON.stringify({ appearance: { tabLayout: "vertical" } }))
-        localStorage.setItem(
-          "opencode.window.browser.dat:tabs",
-          JSON.stringify([
-            { type: "session", server, sessionId: sessionA },
-            ...Array.from({ length: 24 }, (_, index) => ({
-              type: "draft",
-              server,
-              directory,
-              draftID: `draft_scroll_${index}`,
-            })),
-            { type: "session", server, sessionId: sessionB },
-          ]),
-        )
-      },
-      { server, sessionA: sessionA.id, sessionB: sessionB.id, directory: sessionA.directory },
-    )
-    await page.goto("/")
-
-    const sidebar = page.locator('[data-slot="vertical-tabs-sidebar"]')
-    const settings = sidebar.getByRole("button", { name: "Settings", exact: true })
-    const scroll = sidebar.locator('[data-slot="vertical-tabs-scroll"]')
-    const hrefB = `/server/${base64Encode(server)}/session/${sessionB.id}`
-    const tabB = sidebar.locator(`[data-titlebar-tab-link][href="${hrefB}"]`)
-    await expect(sidebar.locator("[data-titlebar-tab-slot]")).toHaveCount(26)
-    await expect(settings).toHaveText("Settings")
-    await page.evaluate((direction) => document.documentElement.setAttribute("dir", direction), direction)
-
-    for (const width of [1280, 800]) {
-      await page.setViewportSize({ width, height: 360 })
-      await expect(settings).toBeInViewport({ ratio: 1 })
-      await expect(sidebar).toHaveCSS("padding-inline-start", "10px")
-      await expect(sidebar).toHaveCSS("padding-bottom", "10px")
-      await expect(settings).toHaveCSS("margin-top", "8px")
-      await expect
-        .poll(() =>
-          sidebar.locator('[data-slot="vertical-tabs-footer"]').evaluate((element) => {
-            const content = Math.max(
-              0,
-              ...Array.from(element.children, (child) => child.getBoundingClientRect().height),
-            )
-            return element.getBoundingClientRect().height - content
-          }),
-        )
-        .toBe(0)
-      await expect(scroll).toHaveCSS("mask-image", /linear-gradient/)
-      await scroll.evaluate((element) => element.scrollTo(0, 0))
-      await expect(scroll).toHaveJSProperty("scrollTop", 0)
-      const pinned = await settings.boundingBox()
-      await scroll.hover()
-      await page.mouse.wheel(0, 200)
-      await expect.poll(() => scroll.evaluate((element) => element.scrollTop)).toBeGreaterThan(0)
-      await expect.poll(() => settings.boundingBox()).toEqual(pinned)
-      await testInfo.attach(`vertical-tabs-settings-${width}`, {
-        body: await sidebar.screenshot(),
-        contentType: "image/png",
-      })
-
-      await scroll.evaluate((element) => element.scrollTo(0, element.scrollHeight))
-      await expect(tabB).toBeInViewport({ ratio: 1 })
-      await expect
-        .poll(async () => {
-          const tab = await tabB.boundingBox()
-          const viewport = await scroll.boundingBox()
-          return !!tab && !!viewport && tab.y + tab.height <= viewport.y + viewport.height - 16
-        })
-        .toBe(true)
-      await expect.poll(() => settings.boundingBox()).toEqual(pinned)
-    }
-
-    await settings.click()
-    await expect(page.getByTestId("settings-screen")).toBeVisible()
-    await expect(settings).toHaveAttribute("aria-pressed", "true")
-    await sidebar.getByRole("button", { name: "Home", exact: true }).click()
-    await expect(page.getByTestId("settings-screen")).toBeHidden()
-    await settings.focus()
-    await settings.press("Enter")
-    await expect(page.getByTestId("settings-screen")).toBeVisible()
-  })
-}
-
 test("appearance experimental settings control vertical tab details", async ({ page }) => {
   await mockServer(page)
   await page.addInitScript(

packages/app/src/shell/shell.tsx

@@ -67,7 +67,7 @@ export default function Layout(props: ParentProps) {
               class="relative flex h-full min-h-0 shrink-0 flex-col bg-v2-background-bg-deep px-2.5 pb-[var(--shell-bottom-inset,8px)] pt-[var(--shell-top-inset,8px)]"
               style={{
                 width: `${state.tabsWidth}px`,
-                "padding-bottom": "max(10px, env(safe-area-inset-bottom, 0px))",
+                "padding-bottom": "max(8px, env(safe-area-inset-bottom, 0px))",
               }}
             >
               <ResizeHandle

packages/app/src/shell/titlebar/titlebar.css

@@ -2,21 +2,6 @@
   user-select: none;
 }
 
-[data-slot="vertical-tabs-sidebar"] [data-slot="vertical-tabs"] {
-  display: flex;
-  flex: 1;
-  flex-direction: column;
-}
-
-[data-slot="vertical-tabs-sidebar"] [data-slot="vertical-tabs-scroll"] {
-  min-height: 0;
-  /* Leave enough space to scroll the final tab clear of the fade above Settings. */
-  padding-block-end: 16px;
-  scroll-padding-block-end: 16px;
-  -webkit-mask-image: linear-gradient(to bottom, black calc(100% - 16px), transparent);
-  mask-image: linear-gradient(to bottom, black calc(100% - 16px), transparent);
-}
-
 [data-slot="mobile-tabs-trigger"][aria-expanded="true"] {
   background:
     linear-gradient(var(--v2-overlay-simple-overlay-hover), var(--v2-overlay-simple-overlay-hover)),

packages/app/src/shell/titlebar/titlebar.tsx

@@ -670,19 +670,10 @@ export function Titlebar(props: {
                                 onReorder={(keys) => tabsStoreActions.reorder(keys)}
                               />
                             </div>
-                            <button
-                              type="button"
-                              data-action="vertical-tabs-settings"
-                              data-state={layout.route().type === "settings" ? "pressed" : undefined}
-                              class="mt-2 flex h-7 w-full shrink-0 items-center gap-1.5 rounded-[6px] px-1.5 text-[13px] leading-4 text-v2-text-text-faint hover:bg-v2-background-bg-layer-02 hover:text-v2-text-text-base data-[state=pressed]:bg-v2-background-bg-layer-02 data-[state=pressed]:text-v2-text-text-base focus-visible:outline-none focus-visible:bg-v2-background-bg-layer-02 [app-region:no-drag]"
-                              onClick={openSettings}
-                              aria-label={language.t("sidebar.settings")}
-                              aria-pressed={layout.route().type === "settings"}
+                            <div
+                              data-slot="vertical-tabs-footer"
+                              class="mt-auto flex h-9 w-full shrink-0 items-center gap-1.5"
                             >
-                              <Icon name="settings-gear" />
-                              {language.t("sidebar.settings")}
-                            </button>
-                            <div data-slot="vertical-tabs-footer" class="flex w-full shrink-0 items-center gap-1.5">
                               <TitlebarRightMount />
                               <Show when={!macVerticalTabs() && !windows()}>
                                 <ChannelIndicator debugTools={props.debugTools} />

packages/core/src/shell/scan.ts

@@ -149,6 +149,7 @@ function scanBash(input: string, depth: number, budget: { remaining: number }):
     const char = input[index]
     if (!wordStarted) wordStart = index
     if (!quote && !wordStarted) {
+      if (char === " " || char === "\t") continue
       const structure = structures.at(-1)
       const token = /^[A-Za-z_][A-Za-z0-9_]*(?=[ \t\n;()<>]|$)/.exec(input.slice(index))?.[0]
       if (structure?.kind === "case" && structure.phase === "header" && token === "in") {
@@ -166,13 +167,24 @@ function scanBash(input: string, depth: number, budget: { remaining: number }):
         segment = index + 1
         continue
       }
+      if (structure?.kind === "for" && structure.phase === "header" && char === "(" && input[index + 1] !== "(") {
+        const values = bashExpansion(input, index, depth, "array")
+        if (!values) return { kind: "opaque", reason: "compound-command" }
+        finishCommand()
+        const failure = addSubstitutions(values)
+        if (failure) return failure
+        commands.push(...nestedCommands.splice(0))
+        // Zsh permits a sublist or brace group directly after the value list, without do/done.
+        structure.phase = "do"
+        if (!/^(?:[ \t\n;]|\\\n|#[^\n]*(?:\n|$))*do(?=[ \t\n;]|$)/.test(input.slice(values.end + 1))) structures.pop()
+        index = values.end
+        segment = index + 1
+        continue
+      }
       if (!words.length && !hasRedirect && !compoundEnd) {
-        const definition =
-          /^(?:function[ \t]+[A-Za-z_][A-Za-z0-9_]*(?:[ \t]*\([ \t]*\))?|[A-Za-z_][A-Za-z0-9_]*[ \t]*\([ \t]*\))[ \t\n]*(?=[{(])/.exec(
-            input.slice(index),
-          )
+        const definition = bashFunctionHead(input, index)
         if (definition && !header()) {
-          index += definition[0].length - 1
+          index += definition.length - 1
           segment = index + 1
           continue
         }
@@ -536,6 +548,14 @@ function scanBash(input: string, depth: number, budget: { remaining: number }):
 
 type BashExpansion = { source: string; end: number; substitutions?: string[] }
 
+function bashFunctionHead(input: string, start: number) {
+  // Share recognition with delimiter scanning so case patterns in function bodies do not close the outer group.
+  // Names need not be variable identifiers. Zsh permits anonymous functions, including in an if condition.
+  return /^(?!if(?:[ \t]|\\\n)*\()(?:function[ \t]+(?:\\\n[ \t]*)*[A-Za-z_][A-Za-z0-9_.:-]*(?:(?:[ \t]|\\\n)*\([ \t]*\))?|(?:[A-Za-z_][A-Za-z0-9_.:-]*(?:[ \t]|\\\n)*)?\([ \t]*\))(?:[ \t\n]|\\\n|#[^\n]*(?:\n|$))*(?=[{(]|\[\[(?=[ \t\n])|(?:if|while|until|for|select|case)[ \t\n])/.exec(
+    input.slice(start),
+  )?.[0]
+}
+
 function bashDelimited(input: string, start: number, depth: number): BashExpansion | undefined {
   if (depth >= MAX_SUBSTITUTION_DEPTH) return
   const close = input[start] === "{" ? "}" : ")"
@@ -544,6 +564,7 @@ function bashDelimited(input: string, start: number, depth: number): BashExpansi
   let commandStart = true
   for (let index = start + 1; index < input.length; index++) {
     const char = input[index]
+    if (char === " " || char === "\t") continue
     if (char === "\\") {
       if (input[index + 1] !== "\n") commandStart = false
       index++
@@ -566,6 +587,11 @@ function bashDelimited(input: string, start: number, depth: number): BashExpansi
       continue
     }
     const boundary = index === start + 1 || /[ \t\n;|&(){}]/.test(input[index - 1])
+    const definition = commandStart && boundary ? bashFunctionHead(input, index) : undefined
+    if (definition) {
+      index += definition.length - 1
+      continue
+    }
     if (char === "#" && boundary) {
       const newline = input.indexOf("\n", index)
       if (newline < 0) return
@@ -725,7 +751,10 @@ function bashExpansion(
       index = nested.end
       continue
     }
-    if (kind === "array" && "<>=".includes(char) && input[index + 1] === "(") {
+    if (
+      ((kind === "array" && "<>=".includes(char)) || (kind === "test" && "<>".includes(char))) &&
+      input[index + 1] === "("
+    ) {
       const nested = bashDelimited(input, index + 1, depth + 1)
       if (!nested) return
       substitutions.push(nested.source)

packages/core/test/shell-scan/compound-parity.test.ts

@@ -0,0 +1,132 @@
+import { describe, expect, test } from "bun:test"
+import { Effect } from "effect"
+import { ShellParse } from "../../src/shell/parse.js"
+import { ShellScan } from "../../src/shell/scan.js"
+
+const contexts = [
+  (source: string) => source,
+  (source: string) => `( ${source} )`,
+  (source: string) => `{ ${source}; }`,
+  (source: string) => `if true; then ${source}; fi`,
+  (source: string) => `outer() { ${source}; }; outer`,
+]
+
+const bodies = [
+  "for value in one two; do scan_probe; done",
+  "while true; do scan_probe; break; done",
+  "until false; do scan_probe; break; done",
+  "case value in value) scan_probe;; *) scan_other;; esac",
+]
+
+describe("compound function acceptance", () => {
+  for (const shell of ["bash", "zsh"]) {
+    for (const head of ["probe()", "function probe", "function probe()", "probe-name()"])
+      for (const body of bodies)
+        for (const context of contexts) {
+          const name = head.includes("probe-name") ? "probe-name" : "probe"
+          const source = context(`${head} ${body}; ${name}`)
+          test(`${shell}: ${source}`, async () => {
+            // Braces preserve the function's behavior, but avoid Tree-sitter's recovery artifacts.
+            const legacy = await Effect.runPromise(
+              ShellParse.scan(context(`${head} { ${body}; }; ${name}`), shell, "/workspace"),
+            )
+            expect(await Effect.runPromise(ShellParse.scanPortable(source, shell, "/workspace"))).toEqual(legacy)
+          })
+        }
+  }
+
+  test.each(bodies)("keeps compound function bodies inside command substitutions: %s", (body) => {
+    const source = `printf '%s' "$( probe() ${body}; probe )"`
+    const result = ShellScan.scan(source)
+    expect(result.kind).toBe("scanned")
+    if (result.kind !== "scanned") throw new Error(result.reason)
+    expect(result.commands[0]?.resource).toBe(source)
+    expect(result.commands.map((command) => command.words[0])).toContain("scan_probe")
+    expect(result.commands.at(-1)?.words).toEqual(["probe"])
+  })
+})
+
+const values = [
+  "one two",
+  "'two words' one",
+  "'cd' '/outside'",
+  "'do' 'done'",
+  "'(literal)' '$(scan_ignored)'",
+  "one\\\ntwo",
+  "$(printf one)",
+  '"$(printf one)"',
+  "<(printf one)",
+  "",
+]
+const loops = values.flatMap((value) =>
+  [
+    `for value (${value}) scan_probe "$value"`,
+    `for value (${value}) { scan_probe "$value"; }`,
+    ...(value
+      ? [
+          `for value (${value}) do scan_probe "$value"; done`,
+          `for value (${value}); do scan_probe "$value"; done`,
+          `for value (${value})\ndo scan_probe "$value"; done`,
+          `for value (${value}) # ignored\ndo scan_probe "$value"; done`,
+          `for value (${value}) \\\ndo scan_probe "$value"; done`,
+        ]
+      : []),
+  ].map((source) => ({ source, equivalent: `for value in ${value}; do scan_probe "$value"; done` })),
+)
+
+describe("Zsh parenthesized loop acceptance", () => {
+  for (const fixture of loops)
+    for (const context of contexts) {
+      const source = context(fixture.source)
+      test(source, async () => {
+        const legacy = await Effect.runPromise(ShellParse.scan(context(fixture.equivalent), "zsh", "/workspace"))
+        expect(await Effect.runPromise(ShellParse.scanPortable(source, "zsh", "/workspace"))).toEqual(legacy)
+      })
+    }
+
+  test.each([
+    "for x (one two) for y (a b) scan_probe",
+    "for x (one two) scan_probe && scan_other",
+    "for x (one two) scan_probe | scan_other",
+    "printf '%s' \"$(for x (one two) scan_probe)\"",
+    "for x (one two) { for y (a b); do scan_probe; done; }",
+    "for x (one two) [[ $(scan_probe) == ok ]]",
+    "for x (one two) (( 1 + $(scan_probe) ))",
+  ])("retains commands in nested shorthand loops: %s", (source) => {
+    const result = ShellScan.scan(source)
+    expect(result.kind).toBe("scanned")
+    if (result.kind !== "scanned") throw new Error(result.reason)
+    expect(result.commands.map((command) => command.words[0])).toContain("scan_probe")
+    if (source.includes("scan_other"))
+      expect(result.commands.map((command) => command.words[0])).toContain("scan_other")
+  })
+})
+
+describe("real-shell compound syntax", () => {
+  for (const shell of ["bash", "zsh"]) {
+    const executable = Bun.which(shell)
+    test
+      .skipIf(!executable)
+      .each([
+        ...bodies.map((body) => `probe() ${body}; probe`),
+        ...bodies.map((body) => `printf '%s' "$(probe() ${body}; probe)"`),
+        ...(shell === "zsh" ? loops.map((fixture) => fixture.source) : []),
+      ])(`${shell}: %s`, (source) => {
+      if (!executable) throw new Error(`${shell} is unavailable`)
+      const execution = Bun.spawnSync(
+        [
+          executable,
+          ...(shell === "bash" ? ["--noprofile", "--norc"] : ["-f"]),
+          "-c",
+          `scan_probe() { printf 'executed\\n' >&2; }; ${source}; wait`,
+        ],
+        { env: { PATH: "/usr/bin:/bin", LC_ALL: "C" }, timeout: 2_000 },
+      )
+      expect(execution.exitCode).toBe(0)
+      expect(execution.stderr.toString()).toEqual(
+        source.includes("value ()") ? "" : expect.stringContaining("executed\n"),
+      )
+      expect(ShellScan.scan(source).kind).toBe("scanned")
+    })
+  }
+})

packages/core/test/shell-scan/parity-regressions.test.ts

@@ -0,0 +1,158 @@
+import { describe, expect, test } from "bun:test"
+import { Effect } from "effect"
+import { ShellParse } from "../../src/shell/parse.js"
+import { ShellScan } from "../../src/shell/scan.js"
+
+const conditions = ["[[ -n <(scan_probe) ]]", "[[ -n >(scan_probe) ]]"]
+const contexts = [
+  (source: string) => source,
+  (source: string) => `( ${source} )`,
+  (source: string) => `{ ${source}; }`,
+  (source: string) => `if ${source}; then printf visible; fi`,
+  (source: string) => `check() { ${source}; }; check`,
+  (source: string) => `printf '%s' "$( ${source}; printf visible)"`,
+]
+
+const functions = ["probe", "probe-name", "probe.name", "probe:name"].flatMap((name) =>
+  [`${name}()`, `function ${name}`, `function ${name}()`].flatMap((head) =>
+    [
+      "{ scan_probe; }",
+      "(scan_probe)",
+      "if true; then scan_probe; fi",
+      "[[ $(scan_probe) == ok ]]",
+      "(( 1 + $(scan_probe) ))",
+    ].map((body) => `${head} ${body}; ${name}`),
+  ),
+)
+
+describe("legacy-accepted shell syntax regressions", () => {
+  test.each(["() { scan_probe; }", "probe() { scan_probe; }; probe"])(
+    "preserves deeply indented function definitions: %s",
+    async (source) => {
+      const command = `( ${" ".repeat(32_000)}${source} )`
+      const legacy = await Effect.runPromise(ShellParse.scan(command, "zsh", "/workspace"))
+      expect(await Effect.runPromise(ShellParse.scanPortable(command, "zsh", "/workspace"))).toEqual(legacy)
+    },
+  )
+
+  test.each(conditions.flatMap((source) => contexts.map((context) => context(source))))(
+    "retains conditional process substitutions and permission resources: %s",
+    async (source) => {
+      const legacy = await Effect.runPromise(ShellParse.scan(source, "bash", "/workspace"))
+      expect(legacy.commands.some((command) => command.resource === "scan_probe")).toBe(true)
+      expect(await Effect.runPromise(ShellParse.scanPortable(source, "bash", "/workspace"))).toEqual(legacy)
+    },
+  )
+
+  for (const shell of ["bash", "zsh"]) {
+    test.each(
+      ["probe()", "probe \\\n()", "function \\\nprobe()", "function probe \\\n()"].flatMap((head) =>
+        [" \\\n", " \\\n # ignored ) }\n", "# ignored \\\n"].flatMap((gap) =>
+          contexts.map((context) => context(`${head}${gap}{ scan_probe; }; probe`)),
+        ),
+      ),
+    )(`${shell} preserves line continuations at function boundaries: %s`, async (source) => {
+      const legacy = await Effect.runPromise(ShellParse.scan(source, shell, "/workspace"))
+      expect(legacy.commands.some((command) => command.resource === "scan_probe")).toBe(true)
+      expect(await Effect.runPromise(ShellParse.scanPortable(source, shell, "/workspace"))).toEqual(legacy)
+    })
+
+    test.each(
+      ["probe()", "function probe", "function probe()"].flatMap((head) =>
+        [" # ignored ) }\n", "\n# ignored ) }\n\n", " # first\n# second\n"].flatMap((gap) =>
+          contexts.map((context) => context(`${head}${gap}{ scan_probe; }; probe`)),
+        ),
+      ),
+    )(`${shell} preserves comments between a function head and its body: %s`, async (source) => {
+      const legacy = await Effect.runPromise(ShellParse.scan(source, shell, "/workspace"))
+      expect(legacy.commands.some((command) => command.resource === "scan_probe")).toBe(true)
+      expect(await Effect.runPromise(ShellParse.scanPortable(source, shell, "/workspace"))).toEqual(legacy)
+    })
+
+    test.each(functions)(
+      `${shell} preserves function resources, saved prefixes, and directories: %s`,
+      async (source) => {
+        const legacy = await Effect.runPromise(ShellParse.scan(source, shell, "/workspace"))
+        expect(legacy.commands.some((command) => command.resource === "scan_probe")).toBe(true)
+        expect(await Effect.runPromise(ShellParse.scanPortable(source, shell, "/workspace"))).toEqual(legacy)
+      },
+    )
+
+    const executable = Bun.which(shell)
+    test
+      .skipIf(!executable)
+      .each([
+        "probe-name() { scan_probe; }; probe-name",
+        "function probe.name { scan_probe; }; probe.name",
+        "probe:name() if true; then scan_probe; fi; probe:name",
+        "probe()# ignored ) }\n{ scan_probe; }; probe",
+        "probe \\\n() \\\n{ scan_probe; }; probe",
+        "function \\\nprobe() # ignored \\\n{ scan_probe; }; probe",
+        ...(shell === "bash" ? conditions : ["() { scan_probe; }"]),
+      ])(`${shell} really executes the extracted command: %s`, (source) => {
+      if (!executable) throw new Error(`${shell} is unavailable`)
+      const execution = Bun.spawnSync(
+        [
+          executable,
+          ...(shell === "bash" ? ["--noprofile", "--norc"] : ["-f"]),
+          "-c",
+          `scan_probe() { printf 'executed\\n' >&2; }; ${source}; wait`,
+        ],
+        { env: { PATH: "/usr/bin:/bin", LC_ALL: "C" } },
+      )
+      expect(execution.exitCode).toBe(0)
+      expect(execution.stderr.toString()).toBe("executed\n")
+      const result = ShellScan.scan(source)
+      expect(result.kind).toBe("scanned")
+      if (result.kind !== "scanned") throw new Error(result.reason)
+      expect(result.commands.map((command) => command.words[0])).toContain("scan_probe")
+    })
+  }
+
+  test.each([
+    "() { scan_probe; }",
+    "( () { scan_probe; } )",
+    "{ () { scan_probe; }; }",
+    "while() { scan_probe; break; }",
+    "until() { scan_probe; break; }",
+  ])("preserves Zsh anonymous functions and parenthesized loop permissions: %s", async (source) => {
+    const legacy = await Effect.runPromise(ShellParse.scan(source, "zsh", "/workspace"))
+    expect(legacy.commands.some((command) => command.resource === "scan_probe")).toBe(true)
+    expect(await Effect.runPromise(ShellParse.scanPortable(source, "zsh", "/workspace"))).toEqual(legacy)
+  })
+
+  // Tree-sitter recovers these valid Zsh forms with synthetic commands or truncated outer resources.
+  // Pin both results rather than treating recovery artifacts as executable shell syntax.
+  test.each([
+    {
+      source: "if () { scan_probe; }; then printf visible; fi",
+      legacy: ["scan_probe", "then printf visible", "fi"],
+      portable: ["scan_probe", "printf visible"],
+    },
+    {
+      source: "check() { () { scan_probe; }; }; check",
+      legacy: ["scan_probe", "}", "check"],
+      portable: ["scan_probe", "check"],
+    },
+    {
+      source: "printf '%s' \"$( () { scan_probe; }; printf visible)\"",
+      legacy: ["printf '%s'", "scan_probe", "printf visible"],
+      portable: ["printf '%s' \"$( () { scan_probe; }; printf visible)\"", "scan_probe", "printf visible"],
+    },
+  ])("accepts anonymous-function compositions despite legacy recovery artifacts: $source", async (fixture) => {
+    const legacy = await Effect.runPromise(ShellParse.scan(fixture.source, "zsh", "/workspace"))
+    const portable = await Effect.runPromise(ShellParse.scanPortable(fixture.source, "zsh", "/workspace"))
+    expect(legacy.commands.map((command) => command.resource)).toEqual([...fixture.legacy])
+    expect(portable.commands.map((command) => command.resource)).toEqual([...fixture.portable])
+  })
+
+  test.each([
+    "[[ -n '<(scan_ignored)' ]]",
+    '[[ -n "<(scan_ignored)" ]]',
+    "[[ -n '>(scan_ignored)' ]]",
+    '[[ -n ">(scan_ignored)" ]]',
+    "[[ -n $'<(scan_ignored)' ]]",
+  ])("does not turn quoted process-substitution text into commands: %s", (source) => {
+    expect(ShellScan.scan(source)).toEqual({ kind: "scanned", commands: [] })
+  })
+})

packages/core/test/shell-scan/powershell-runtime.test.ts

@@ -3,7 +3,30 @@ import { ShellScan } from "../../src/shell/scan.js"
 
 const pwsh = process.env.SHELL_SCAN_PWSH ?? Bun.which("pwsh")
 
+// These ordinary forms must stay accepted, not disappear behind the oracle's opaque-result filter.
+const supported = [
+  "Invoke-ProbeA; Invoke-ProbeB",
+  "$result = Invoke-ProbeA; Invoke-ProbeB",
+  "if (Invoke-ProbeA) { Invoke-ProbeB } else { Invoke-ProbeC }",
+  "foreach ($item in (Invoke-ProbeA)) { Invoke-ProbeB }",
+  "function Get-Probe { param($x); Invoke-ProbeB }; Invoke-ProbeA",
+  "$x = @{ first = Invoke-ProbeA; second = @(Invoke-ProbeB; Invoke-ProbeC) }",
+  'Invoke-ProbeA "$(Invoke-ProbeB "$(Invoke-ProbeC)")"',
+  "Invoke-ProbeA | ForEach-Object { Invoke-ProbeB }",
+  "Invoke-ProbeA @'\nliteral ; }\n'@; Invoke-ProbeB",
+  'Invoke-ProbeA @"\n$(Invoke-ProbeB)\n"@; Invoke-ProbeC',
+  "Invoke-ProbeA `\n  argument; Invoke-ProbeB",
+  "Invoke-ProbeA 2>&1; Invoke-ProbeB",
+  "& 'Invoke-ProbeA' argument; Invoke-ProbeB",
+  "Invoke-ProbeA --% literal; ignored\nInvoke-ProbeB",
+]
+
+test.each(supported)("accepts supported PowerShell syntax without an opaque escape hatch: %s", (source) => {
+  expect(ShellScan.scanPowerShell(source).kind).toBe("scanned")
+})
+
 const fixtures = [
+  ...supported,
   ...[
     "$result = Invoke-ProbeA; Invoke-ProbeB",
     "$result = (Invoke-ProbeA); Invoke-ProbeB",
@@ -343,6 +366,10 @@ test.skipIf(!pwsh)(
     let executed = 0
     for (const result of results) {
       const scan = ShellScan.scanPowerShell(result.source)
+      if (supported.includes(result.source)) {
+        expect(result.errors, result.source).toEqual([])
+        expect(scan.kind, result.source).toBe("scanned")
+      }
       if (scan.kind === "opaque" || result.errors.length > 0) continue
       scanned++
       executed += result.executed.length

packages/core/test/tool-shell.test.ts

@@ -526,6 +526,150 @@ describe("ShellTool scanner permissions", () => {
   }
 })
 
+describe("ShellTool conditional process substitution", () => {
+  const test = isWindows || !Bun.which("bash") ? permissionIt.live.skip : permissionIt.live
+  for (const portable of [false, true]) {
+    test(`${portable ? "native" : "legacy"}: a nested deny prevents the substitution from running`, () =>
+      withScanner(
+        portable,
+        (registry, directory) =>
+          Effect.gen(function* () {
+            const agents = yield* Agent.Service
+            yield* agents.transform((editor) =>
+              editor.update(toolIdentity.agent, (agent) => {
+                agent.permissions = [
+                  { action: "shell", resource: "*", effect: "allow" },
+                  { action: "shell", resource: "printf *", effect: "deny" },
+                ]
+              }),
+            )
+            const marker = path.join(directory.active, "marker")
+            const result = yield* runPermissionCommand(
+              registry,
+              '[[ -n <(printf reached > marker) ]]; wait "$!"',
+              marker,
+              [],
+            )
+            expect(result.exit).toMatchObject({
+              _tag: "Success",
+              value: { status: "error", error: { message: expect.stringContaining("Permission denied: shell") } },
+            })
+            expect(yield* Effect.promise(() => Bun.file(marker).exists())).toBe(false)
+          }),
+        "bash",
+      ))
+
+    for (const reply of ["reject", "once", "always"] as const) {
+      test(`${portable ? "native" : "legacy"}: conditional substitutions respect ${reply}`, () =>
+        withScanner(
+          portable,
+          (registry, directory) =>
+            Effect.gen(function* () {
+              const saved = yield* PermissionSaved.Service
+              const location = yield* Location.Service
+              yield* saved.add({ projectID: location.project.id, action: "shell", resources: ["wait *"] })
+              const marker = path.join(directory.active, "marker")
+              const command = '[[ -n <(printf reached > marker) ]]; wait "$!"'
+              const result = yield* runPermissionCommand(registry, command, marker, [reply])
+              expect(result.requests).toMatchObject([
+                { action: "shell", resources: ["printf reached > marker", 'wait "$!"'], save: ["printf *", "wait *"] },
+              ])
+              if (reply === "reject") {
+                expect(Exit.isFailure(result.exit)).toBe(true)
+                expect(yield* Effect.promise(() => Bun.file(marker).exists())).toBe(false)
+                return
+              }
+              expect(result.exit).toMatchObject({
+                _tag: "Success",
+                value: { status: "completed", metadata: { exit: 0 } },
+              })
+              expect(yield* Effect.promise(() => Bun.file(marker).text())).toBe("reached")
+              yield* Effect.promise(() => fs.unlink(marker))
+              const repeat = yield* runPermissionCommand(
+                registry,
+                command,
+                marker,
+                reply === "always" ? [] : ["reject"],
+              )
+              expect(repeat.requests).toHaveLength(reply === "always" ? 0 : 1)
+              expect(yield* Effect.promise(() => Bun.file(marker).exists())).toBe(reply === "always")
+            }),
+          "bash",
+        ))
+    }
+  }
+})
+
+describe("ShellTool compound syntax approval compatibility", () => {
+  for (const fixture of [
+    {
+      shell: "zsh",
+      command: 'for value (a b) printf %s "$value"',
+      equivalent: 'for value in a b; do printf %s "$value"; done',
+      output: "ab",
+      saved: ["printf *"],
+    },
+    {
+      shell: "zsh",
+      command: 'for value (a b) { printf %s "$value"; }',
+      equivalent: 'for value in a b; do printf %s "$value"; done',
+      output: "ab",
+      saved: ["printf *"],
+    },
+    {
+      shell: "zsh",
+      command: 'for value ($(printf a)) do printf %s "$value"; done',
+      equivalent: 'for value in $(printf a); do printf %s "$value"; done',
+      output: "a",
+      saved: ["printf *"],
+    },
+    {
+      shell: "bash",
+      command: 'probe() for value in a b; do printf %s "$value"; done; probe',
+      equivalent: 'probe() { for value in a b; do printf %s "$value"; done; }; probe',
+      output: "ab",
+      saved: ["printf *", "probe *"],
+    },
+    {
+      shell: "bash",
+      command: 'printf %s "$(probe() case value in value) printf hello;; esac; probe)"',
+      equivalent: 'printf %s "$(probe() { case value in value) printf hello;; esac; }; probe)"',
+      output: "hello",
+      saved: ["printf *", "probe *"],
+    },
+  ]) {
+    const test = isWindows || !Bun.which(fixture.shell) ? permissionIt.live.skip : permissionIt.live
+    for (const portable of [false, true]) {
+      test(`${fixture.shell} ${portable ? "native" : "legacy equivalent"}: ${fixture.command}`, () =>
+        withScanner(
+          portable,
+          (registry, directory) =>
+            Effect.gen(function* () {
+              const saved = yield* PermissionSaved.Service
+              const location = yield* Location.Service
+              yield* saved.add({ projectID: location.project.id, action: "shell", resources: fixture.saved })
+              const result = yield* runPermissionCommand(
+                registry,
+                portable ? fixture.command : fixture.equivalent,
+                path.join(directory.active, "marker"),
+                [],
+              )
+              expect(result.requests).toEqual([])
+              expect(result.exit).toMatchObject({
+                _tag: "Success",
+                value: {
+                  status: "completed",
+                  metadata: { exit: 0 },
+                  content: [{ type: "text", text: fixture.output }, { type: "text" }],
+                },
+              })
+            }),
+          fixture.shell,
+        ))
+    }
+  }
+})
+
 describe("ShellTool ordinary shell syntax", () => {
   for (const shell of ["bash", "zsh"]) {
     const test = isWindows || !Bun.which(shell) ? permissionIt.live.skip : permissionIt.live

packages/tui/src/routes/session/composer/shell-tab.tsx

@@ -105,7 +105,7 @@ export function ShellTab(props: { sessionID: string }) {
                   backgroundColor={
                     active() ? theme.background.action.primary.focused : theme.background.action.primary.default
                   }
-                  onMouseOver={() => setStore("selected", index())}
+                  onMouseMove={() => setStore("selected", index())}
                 >
                   <text
                     fg={active() ? theme.text.action.primary.focused : theme.text.action.primary.default}

packages/tui/src/routes/session/composer/subagents-tab.tsx

@@ -215,7 +215,7 @@ export function SubagentsTab(props: { sessionID: string }) {
                         ? theme.background.action.primary.selected
                         : theme.background.action.primary.default
                   }
-                  onMouseOver={() => setStore("selected", index())}
+                  onMouseMove={() => setStore("selected", index())}
                   onMouseUp={() => {
                     setStore("selected", index())
                     navigate({ type: "session", sessionID: entry.sessionID })

packages/tui/src/routes/session/composer/terminals-tab.tsx

@@ -84,7 +84,7 @@ export function TerminalsTab(props: { sessionID: string; visibleTerminalID?: str
                       ? theme.background.action.primary.selected
                       : theme.background.action.primary.default
                 }
-                onMouseOver={() => setSelected(index())}
+                onMouseMove={() => setSelected(index())}
                 onMouseUp={() => {
                   setSelected(index())
                   select()

packages/tui/test/cli/tui/composer-keymap.test.tsx

@@ -1,7 +1,8 @@
 /** @jsxImportSource @opentui/solid */
 import { testRender } from "@opentui/solid"
+import { TextAttributes } from "@opentui/core"
 import { expect, test } from "bun:test"
-import { onMount } from "solid-js"
+import { createSignal, onMount } from "solid-js"
 import { ConfigProvider } from "../../../src/config"
 import type { TuiKeybind } from "../../../src/config/keybind"
 import { ClientProvider } from "../../../src/context/client"
@@ -9,8 +10,13 @@ import { DataProvider, useData } from "../../../src/context/data"
 import { Keymap } from "../../../src/context/keymap"
 import { LocationProvider } from "../../../src/context/location"
 import { RouteProvider, useRoute } from "../../../src/context/route"
+import { TuiAppProvider } from "../../../src/context/runtime"
+import { SessionTerminalsProvider, useSessionTerminals } from "../../../src/context/session-terminals"
+import { StorageProvider, useStorage } from "../../../src/context/storage"
 import { ThemeProvider } from "../../../src/context/theme"
 import { Composer } from "../../../src/routes/session/composer"
+import { ToastProvider } from "../../../src/ui/toast"
+import { tmpdir } from "../../fixture/fixture"
 import { createApi, createEventStream, createFetch, directory, json } from "../../fixture/tui-client"
 import { TestTuiContexts } from "../../fixture/tui-environment"
 import { createTuiResolvedConfig } from "../../fixture/tui-runtime"
@@ -22,9 +28,22 @@ const sessions = {
 }
 
 const shells = [shell("sh-a", "bun test"), shell("sh-b", "bun dev")]
+const terminals = ["First terminal", "Second terminal"].map((title, index) => ({
+  id: `pty-${index}`,
+  title,
+  command: "/bin/sh",
+  args: [],
+  cwd: directory,
+  status: "running",
+  pid: index + 1,
+  sessionID: "parent",
+  foregroundProcess: null,
+  size: { cols: 100, rows: 20 },
+  output: { head: 0, tail: 0 },
+}))
 
 async function renderComposer(
-  defaultTab: "subagents" | "shell",
+  defaultTab: "subagents" | "shell" | "terminals",
   keybinds: Partial<TuiKeybind.Keybinds>,
   focusedTextarea = false,
 ) {
@@ -32,10 +51,14 @@ async function renderComposer(
   const interrupted: string[] = []
   const removed: string[] = []
   const ready = Promise.withResolvers<void>()
+  const [open, setOpen] = createSignal(true)
+  const temporary = await tmpdir()
   let closed = 0
   let dispatch!: ReturnType<typeof Keymap.use>["dispatch"]
   let route!: ReturnType<typeof useRoute>
+  let storage!: ReturnType<typeof useStorage>
   const calls = createFetch((url, request) => {
+    if (url.pathname === "/api/experimental/session/parent/terminal") return json({ data: terminals })
     if (url.pathname === "/api/session/active")
       return json({ data: { "child-a": { type: "running" }, "child-b": { type: "running" } } })
     const sessionID = url.pathname.match(/^\/api\/session\/([^/]+)$/)?.[1]
@@ -61,6 +84,8 @@ async function renderComposer(
 
   function Content() {
     const data = useData()
+    const terminals = useSessionTerminals()
+    storage = useStorage()
     route = useRoute()
     dispatch = Keymap.use().dispatch
     onMount(() => {
@@ -69,6 +94,7 @@ async function renderComposer(
         data.session.sync("child-a"),
         data.session.sync("child-b"),
         data.shell.sync(),
+        terminals.refresh("parent"),
       ])
         .then(() => wait(() => data.session.status("child-a") === "running"))
         .then(() => ready.resolve(), ready.reject)
@@ -76,7 +102,13 @@ async function renderComposer(
     return (
       <>
         {focusedTextarea && <textarea focused={true} initialValue="draft" />}
-        <Composer sessionID="parent" open={true} defaultTab={defaultTab} onClose={() => closed++} />
+        <Composer
+          sessionID="parent"
+          open={open()}
+          defaultTab={defaultTab}
+          visibleTerminalID="pty-0"
+          onClose={() => closed++}
+        />
       </>
     )
   }
@@ -92,23 +124,31 @@ async function renderComposer(
 
   const app = await testRender(
     () => (
-      <TestTuiContexts directory={directory}>
-        <ConfigProvider config={createTuiResolvedConfig({ keybinds, session: { terminal: false } })}>
-          <Keymap.Provider>
-            <ClientProvider api={createApi(calls.fetch)}>
-              <DataProvider directory={process.cwd()}>
-                <LocationProvider>
-                  <RouteProvider initialRoute={{ type: "session", sessionID: "parent" }}>
-                    <ThemeProvider mode="dark" source={{ discover: async () => ({}) }}>
-                      <Content />
-                    </ThemeProvider>
-                  </RouteProvider>
-                </LocationProvider>
-              </DataProvider>
-            </ClientProvider>
-            <AppExit />
-          </Keymap.Provider>
-        </ConfigProvider>
+      <TestTuiContexts directory={directory} paths={{ state: temporary.path }}>
+        <TuiAppProvider value={{ name: "test", version: "test", channel: "test" }}>
+          <StorageProvider>
+            <ConfigProvider config={createTuiResolvedConfig({ keybinds, session: { terminal: true } })}>
+              <Keymap.Provider>
+                <ClientProvider api={createApi(calls.fetch)}>
+                  <DataProvider directory={process.cwd()}>
+                    <LocationProvider>
+                      <RouteProvider initialRoute={{ type: "session", sessionID: "parent" }}>
+                        <ThemeProvider mode="dark" source={{ discover: async () => ({}) }}>
+                          <ToastProvider>
+                            <SessionTerminalsProvider>
+                              <Content />
+                            </SessionTerminalsProvider>
+                          </ToastProvider>
+                        </ThemeProvider>
+                      </RouteProvider>
+                    </LocationProvider>
+                  </DataProvider>
+                </ClientProvider>
+                <AppExit />
+              </Keymap.Provider>
+            </ConfigProvider>
+          </StorageProvider>
+        </TuiAppProvider>
       </TestTuiContexts>
     ),
     { width: 100, height: 20, kittyKeyboard: true },
@@ -122,9 +162,85 @@ async function renderComposer(
     route: () => route.data,
     dispatch: (command: string) => dispatch(command),
     closed: () => closed,
+    setOpen,
+    selected: () =>
+      app
+        .captureSpans()
+        .lines.flatMap((line) => line.spans)
+        .filter((span) => span.attributes & TextAttributes.BOLD)
+        .map((span) => span.text.trim()),
+    async dispose() {
+      app.renderer.destroy()
+      await storage.flush()
+      await temporary[Symbol.asyncDispose]()
+    },
   }
 }
 
+const tabs = [
+  { tab: "subagents", first: "Build: First", second: "Build: Second" },
+  { tab: "shell", first: "bun test", second: "bun dev" },
+  { tab: "terminals", first: "First terminal", second: "Second terminal" },
+] as const
+
+test.each([...tabs])("opening $tab under a stationary pointer preserves selection", async ({ tab, first, second }) => {
+  const composer = await renderComposer(tab, {})
+  try {
+    const row = composer.app
+      .captureCharFrame()
+      .split("\n")
+      .findIndex((line) => line.includes(second))
+    expect(row).toBeGreaterThan(0)
+    expect(composer.selected()).toContain(first)
+
+    composer.setOpen(false)
+    await composer.app.renderOnce()
+    await composer.app.mockMouse.moveTo(10, row)
+    composer.setOpen(true)
+    await composer.app.renderOnce()
+    await composer.app.renderOnce()
+
+    expect(composer.selected()).toContain(first)
+    expect(composer.selected()).not.toContain(second)
+  } finally {
+    await composer.dispose()
+  }
+})
+
+test.each([...tabs])("moving within a $tab row selects it after opening", async ({ tab, first, second }) => {
+  const composer = await renderComposer(tab, {})
+  try {
+    const row = composer.app
+      .captureCharFrame()
+      .split("\n")
+      .findIndex((line) => line.includes(second))
+    expect(row).toBeGreaterThan(0)
+
+    composer.setOpen(false)
+    await composer.app.renderOnce()
+    await composer.app.mockMouse.moveTo(10, row)
+    composer.setOpen(true)
+    await composer.app.renderOnce()
+    await composer.app.renderOnce()
+    await composer.app.mockMouse.moveTo(11, row)
+    await composer.app.renderOnce()
+
+    expect(composer.selected()).toContain(second)
+    expect(composer.selected()).not.toContain(first)
+
+    composer.app.mockInput.pressArrow("up")
+    await composer.app.renderOnce()
+    await composer.app.renderOnce()
+    expect(composer.selected()).toContain(first)
+
+    await composer.app.mockMouse.moveTo(12, row)
+    await composer.app.renderOnce()
+    expect(composer.selected()).toContain(second)
+  } finally {
+    await composer.dispose()
+  }
+})
+
 test("disabled subagent bindings have no component fallbacks", async () => {
   const composer = await renderComposer("subagents", {
     "composer.subagent.up": "none",
@@ -146,7 +262,7 @@ test("disabled subagent bindings have no component fallbacks", async () => {
     composer.dispatch("composer.subagent.select")
     expect(composer.route()).toMatchObject({ type: "session", sessionID: "child-a" })
   } finally {
-    composer.app.renderer.destroy()
+    await composer.dispose()
   }
 })
 
@@ -169,7 +285,7 @@ test("disabled shell bindings have no component fallbacks", async () => {
     await wait(() => composer.removed.length === 1)
     expect(composer.removed).toEqual(["sh-a"])
   } finally {
-    composer.app.renderer.destroy()
+    await composer.dispose()
   }
 })
 
@@ -183,7 +299,7 @@ test("configured composer bindings work with a focused textarea", async () => {
     await wait(() => composer.removed.length === 1)
     expect(composer.removed).toEqual(["sh-a"])
   } finally {
-    composer.app.renderer.destroy()
+    await composer.dispose()
   }
 })
 
@@ -194,7 +310,7 @@ test("ctrl+c closes the active composer", async () => {
     composer.app.mockInput.pressKey("c", { ctrl: true })
     await composer.app.waitFor(() => composer.closed() === 1)
   } finally {
-    composer.app.renderer.destroy()
+    await composer.dispose()
   }
 })