fix(browser): support Termux Android scenarios

.github/workflows/real-termux.yml

@@ -0,0 +1,57 @@
+name: Real Termux browser verification
+
+on:
+  workflow_dispatch:
+
+concurrency:
+  group: real-termux-${{ github.ref }}
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+env:
+  HUSKY: "0"
+
+jobs:
+  real-termux:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v4
+      - name: Download the pinned Termux app and verify its release checksum
+        shell: bash
+        run: |
+          mkdir -p "$RUNNER_TEMP/rea-termux"
+          cd "$RUNNER_TEMP/rea-termux"
+          release=https://github.com/termux/termux-app/releases/download/v0.118.3
+          apk=termux-app_v0.118.3+github-debug_x86_64.apk
+          sums=termux-app_v0.118.3+github-debug_sha256sums
+          curl --fail --location --retry 3 --output "$apk" "$release/$apk"
+          curl --fail --location --retry 3 --output "$sums" "$release/$sums"
+          awk -v apk="$apk" '$2 == apk || $2 == "*" apk' "$sums" > selected.sha256
+          test "$(wc -l < selected.sha256)" -eq 1
+          sha256sum --check selected.sha256
+      - name: Enable emulator acceleration
+        run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
+      - name: Build and capture a page inside Termux
+        uses: reactivecircus/android-emulator-runner@4c44018e59b437e86cdfc41da381398f93ed8808 # v2
+        with:
+          api-level: 30
+          arch: x86_64
+          target: google_apis
+          ram-size: 4096M
+          heap-size: 512M
+          disk-size: 8192M
+          disable-animations: true
+          script: bash scripts/verify/termux/emulator.sh
+      - name: Upload Termux and Android diagnostics
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: termux-browser-diagnostics
+          path: ${{ runner.temp }}/rea-termux/diagnostics
+          if-no-files-found: warn

docs/testing.md

@@ -765,6 +765,35 @@ separate Apple-artifact and real-provider lanes. Actual Hopper, Ghidra, IDA,
 browser and managed-tool claims require their corresponding verification lanes.
 Runner labels follow the [GitHub hosted-runner reference](https://docs.github.com/en/actions/reference/runners/github-hosted-runners).
 
+### Termux Android browser smoke test
+
+The **Real Termux browser verification** workflow is manual-only while its
+emulator setup is being validated. After the workflow reaches the default
+branch, select a revision under **Actions → Real Termux browser verification →
+Run workflow**. It boots an Android 11 (API 30) x86_64 emulator, installs the
+checksum-verified Termux 0.118.3 APK, and lets the app initialize its bootstrap.
+The host stages the selected revision using `git archive HEAD`; no workstation
+build outputs or dependencies are copied into Android.
+
+`scripts/verify/termux/emulator.sh` sends a `RUN_COMMAND` intent to Termux's app
+service. Root access is limited to staging files, sending the intent, and reading
+diagnostics; installation, compilation, Node, and Chromium run as Termux's app
+UID. The in-app script installs Termux's Android-linked Node distribution,
+checks its version against `.nvmrc`, pins npm from `packageManager`, runs
+`npm ci`, and builds with `build:termux`. Termux repository packages, including
+Chromium, are resolved at run time; their installed versions are logged.
+
+The verifier leaves Playwright's cache environment overrides unset, requires
+a healthy public MCP doctor result, and captures URL plus DOM from a loopback
+HTTP fixture through `capture-browser-scenario`. It checks completed steps,
+the exact URL, a DOM marker, and reported browser cleanup. This lane covers one
+Android emulator and Termux combination, not physical ARM devices, Electron,
+or the complete desktop browser suite. A workflow definition alone does not
+establish passing Android coverage; inspect its execution receipt.
+
+The `termux-browser-diagnostics` artifact retains the Termux command log, exit
+status, and Android logcat on success or failure. The emulator is disposable.
+
 ## Developer commands
 
 Use source feedback while editing, explicit boundary checks for the changed

package.json

@@ -101,6 +101,8 @@
     "precheck:ci": "npm run deps:check",
     "check:ci": "node scripts/run-exclusive.mjs artifacts turbo run typecheck lint format:check knip metadata:check jscpd scan:todos && npm run verify:architecture-guards",
     "build:cached": "node scripts/check-dependency-install.mjs && node scripts/run-exclusive.mjs artifacts turbo run artifacts:skills",
+    "build:termux": "node scripts/run-exclusive.mjs artifacts npm run build:termux:run",
+    "build:termux:run": "npm run compile:termux && npm run artifacts:skills",
     "format": "oxfmt .",
     "format:check": "oxfmt --check .",
     "lint": "oxlint && npm run verify:module-boundaries",
@@ -236,6 +238,7 @@
     "verify:recorded:crash": "npm run build:cached && node scripts/verify-recorded-crash.mjs",
     "mcp-catalog:check:built": "node scripts/generate-mcp-tool-catalog.mjs --check",
     "compile": "node scripts/clean-build-output.mjs && tsc -p tsconfig.build.json",
+    "compile:termux": "node scripts/clean-build-output.mjs && node --max-old-space-size=3072 node_modules/typescript-termux/lib/tsc.js -p tsconfig.build.json",
     "artifacts:mcp-catalog": "node scripts/generate-mcp-tool-catalog.mjs",
     "artifacts:skills": "node scripts/generate-skill-metadata.mjs",
     "artifacts:product-catalog": "node scripts/generate-product-catalog.mjs",
@@ -309,6 +312,7 @@
     "oxlint": "1.87.0",
     "turbo": "2.11.7",
     "typescript": "7.0.2",
+    "typescript-termux": "npm:typescript@5.9.3",
     "vitepress": "1.6.4",
     "vitest": "5.0.3"
   }

scripts/rea.mjs

@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 
 import { access } from "node:fs/promises";
-import { dirname, resolve } from "node:path";
+import { dirname, join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
 
 // Route production MCP before importing Incur. Incur owns registration helpers
@@ -15,6 +15,21 @@ const isMcpMode =
   args.length === 1 && (args[0] === "--mcp" || args[0] === "mcp");
 const isMcpDoctorMode = args[0] === "mcp" && args[1] === "doctor";
 const packageRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
+
+// Playwright's registry assumes one of its three desktop host platforms when
+// it chooses the browser cache directory. Termux reports `android`, although
+// its Node runtime and filesystem are POSIX-compatible. Keep the cache path
+// explicit so REA can start on Termux. Browser launch still requires a
+// caller-supplied Android-compatible Chromium executable.
+if (
+  process.platform === "android" &&
+  process.env.PLAYWRIGHT_BROWSERS_PATH === undefined
+) {
+  const cacheRoot =
+    process.env.XDG_CACHE_HOME ?? join(process.env.HOME ?? ".", ".cache");
+  process.env.PLAYWRIGHT_BROWSERS_PATH = join(cacheRoot, "ms-playwright");
+}
+
 const runtimeFiles = isMcpMode
   ? ["dist/main.js"]
   : isMcpDoctorMode

scripts/verify/termux/browser.mjs

@@ -0,0 +1,86 @@
+#!/usr/bin/env node
+
+import assert from "node:assert/strict";
+import { execFile } from "node:child_process";
+import { createServer } from "node:http";
+import { promisify } from "node:util";
+
+const execute = promisify(execFile);
+assert.equal(process.platform, "android", "Run this verifier inside Termux");
+assert.equal(process.env.PLAYWRIGHT_BROWSERS_PATH, undefined);
+// Import no browser provider here: the public dispatcher must establish its
+// Android cache fallback before Playwright initializes in each subprocess.
+const { stdout: doctorOutput } = await execute(
+  process.execPath,
+  ["scripts/rea.mjs", "mcp", "doctor", "--format", "json"],
+  { timeout: 120_000, maxBuffer: 8 * 1024 * 1024 },
+);
+assert.equal(JSON.parse(doctorOutput).healthy, true, doctorOutput);
+const executable = `${process.env.PREFIX}/bin/chromium`;
+const { stdout: chromiumVersion } = await execute(executable, ["--version"], {
+  timeout: 30_000,
+});
+const marker = "rea-termux-browser-smoke";
+const server = createServer((_request, response) => {
+  response.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
+  response.end(`<!doctype html><html><body><h1>${marker}</h1></body></html>`);
+});
+await new Promise((resolve, reject) => {
+  server.once("error", reject);
+  server.listen(0, "127.0.0.1", resolve);
+});
+try {
+  const url = `http://127.0.0.1:${server.address().port}/smoke`;
+  const scenario = {
+    browser: { mode: "launch", executable_path: executable },
+    start_url: { url },
+    actions: [
+      {
+        step_id: "ready",
+        action: "wait_for",
+        locator: { kind: "css", selector: "h1" },
+        state: "visible",
+      },
+    ],
+    capture: { at_end: ["url", "dom"] },
+  };
+  const { stdout } = await execute(
+    process.execPath,
+    [
+      "scripts/rea.mjs",
+      "capture-browser-scenario",
+      JSON.stringify(scenario),
+      "--json",
+    ],
+    { timeout: 180_000, maxBuffer: 16 * 1024 * 1024 },
+  );
+  const evidence = JSON.parse(stdout);
+  assert.equal(evidence.error, undefined, stdout);
+  const capture = evidence.normalized_result;
+  assert.ok(
+    capture.steps.every((step) => step.status === "completed"),
+    stdout,
+  );
+  const artifacts = capture.steps.at(-1).artifacts;
+  assert.equal(artifacts.url.state, "captured", stdout);
+  assert.equal(artifacts.url.value.url, url);
+  assert.equal(artifacts.dom.state, "captured", stdout);
+  assert.ok(artifacts.dom.value.text.includes(`<h1>${marker}</h1>`), stdout);
+  assert.equal(capture.browser.cleanup, "terminated-owned-process");
+  console.log(
+    JSON.stringify({
+      platform: process.platform,
+      architecture: process.arch,
+      node: process.version,
+      chromium: chromiumVersion.trim(),
+      mcp_doctor: "healthy",
+      url_capture: "passed",
+      dom_capture: "passed",
+      cleanup: capture.browser.cleanup,
+    }),
+  );
+} finally {
+  await new Promise((resolve, reject) =>
+    server.close((cause) => (cause ? reject(cause) : resolve())),
+  );
+}

scripts/verify/termux/emulator.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+# Host-side orchestration. Root is used only to stage/read files and send the
+# intent; TermuxService launches all package/build/browser work as the app UID.
+set -euo pipefail
+
+staging="${RUNNER_TEMP:?}/rea-termux"
+app_home=/data/data/com.termux/files/home
+prefix=/data/data/com.termux/files/usr
+mkdir -p "$staging/diagnostics"
+collect_diagnostics() {
+  adb logcat -d > "$staging/diagnostics/logcat.txt" 2>&1 || true
+  adb exec-out cat "$app_home/rea-ci/run.log" > "$staging/diagnostics/termux.log" 2>&1 || true
+  adb exec-out cat "$app_home/rea-ci/status" > "$staging/diagnostics/status.txt" 2>&1 || true
+}
+trap collect_diagnostics EXIT
+
+adb root
+adb wait-for-device
+adb install "$staging/termux-app_v0.118.3+github-debug_x86_64.apk"
+adb shell am start -n com.termux/.app.TermuxActivity
+# First launch unpacks the APK's bundled bootstrap. Do not replace it with a
+# root-installed userland: that would miss Termux's own initialization.
+deadline=$((SECONDS + 180))
+until adb shell test -x "$prefix/bin/bash"; do
+  if (( SECONDS >= deadline )); then
+    echo 'Termux bootstrap did not finish within 180 seconds' >&2
+    exit 1
+  fi
+  sleep 2
+done
+
+git archive --format=tar HEAD > "$staging/source.tar"
+adb push "$staging/source.tar" /data/local/tmp/rea-source.tar
+adb push scripts/verify/termux/in-app.sh /data/local/tmp/rea-in-app.sh
+adb shell chmod 644 /data/local/tmp/rea-source.tar /data/local/tmp/rea-in-app.sh
+app_uid=$(adb shell stat -c %u /data/data/com.termux | tr -d '\r')
+[[ "$app_uid" =~ ^[0-9]+$ && "$app_uid" != 0 ]]
+adb shell mkdir -p "$app_home/rea-ci" "$app_home/.termux"
+adb shell "echo allow-external-apps=true > $app_home/.termux/termux.properties"
+adb shell cp /data/local/tmp/rea-in-app.sh "$app_home/rea-ci/in-app.sh"
+adb shell cp /data/local/tmp/rea-source.tar "$app_home/rea-ci/source.tar"
+adb shell chown -R "$app_uid:$app_uid" "$app_home/rea-ci" "$app_home/.termux"
+adb shell restorecon -RF "$app_home/rea-ci" "$app_home/.termux"
+# Reload the external-command policy in a fresh app process before sending it.
+adb shell am force-stop com.termux
+adb shell am start -n com.termux/.app.TermuxActivity
+# Root may send this permission-protected intent; the service executes as the
+# application, rather than running Node/Chromium through adb shell or su.
+adb shell am startservice \
+  -n com.termux/.app.RunCommandService \
+  -a com.termux.RUN_COMMAND \
+  --es com.termux.RUN_COMMAND_PATH "$prefix/bin/bash" \
+  --esa com.termux.RUN_COMMAND_ARGUMENTS "-l,$app_home/rea-ci/in-app.sh" \
+  --es com.termux.RUN_COMMAND_WORKDIR "$app_home" \
+  --ez com.termux.RUN_COMMAND_BACKGROUND true
+
+deadline=$((SECONDS + 2100))
+until adb shell test -f "$app_home/rea-ci/status"; do
+  if (( SECONDS >= deadline )); then
+    echo 'Termux verification exceeded 35 minutes' >&2
+    exit 1
+  fi
+  sleep 5
+done
+adb exec-out cat "$app_home/rea-ci/run.log"
+status=$(adb shell cat "$app_home/rea-ci/status" | tr -d '\r')
+[[ "$status" == 0 ]]

scripts/verify/termux/in-app.sh

@@ -0,0 +1,33 @@
+#!/data/data/com.termux/files/usr/bin/bash
+set -euo pipefail
+
+report="$HOME/rea-ci"
+exec > "$report/run.log" 2>&1
+# Publish the result only after all commands have settled. The host reads it as
+# root; no shared-storage permission or helper Android application is needed.
+trap 'result=$?; printf "%s\n" "$result" > "$report/status"' EXIT
+set -x
+[[ "$(id -u)" != 0 ]]
+export DEBIAN_FRONTEND=noninteractive
+export HUSKY=0
+pkg update -y
+pkg upgrade -y
+pkg install -y nodejs-lts npm git x11-repo termux-exec
+pkg install -y chromium
+mkdir -p "$report/source"
+tar -xf "$report/source.tar" -C "$report/source"
+cd "$report/source"
+node -e 'if (process.platform !== "android") throw new Error("Expected Android Node.js")'
+node -e 'const expected = require("node:fs").readFileSync(".nvmrc", "utf8").trim().replace(/^v/, ""); if (process.versions.node !== expected) throw new Error(`Termux Node ${process.versions.node} differs from .nvmrc ${expected}`)'
+# Android uses Termux's Bionic-linked Node distribution; the desktop .nvmrc
+# binary cannot run here. Keep npm at the repository's exact pinned version.
+npm install --prefix "$report/toolchain" --no-package-lock --ignore-scripts \
+  "$(node -p 'JSON.parse(require("node:fs").readFileSync("package.json", "utf8")).packageManager')"
+export PATH="$report/toolchain/node_modules/.bin:$PATH"
+node --version
+npm --version
+dpkg-query -W nodejs-lts chromium termux-exec
+npm ci
+npm run build:termux
+unset PLAYWRIGHT_BROWSERS_PATH npm_config_playwright_browsers_path npm_package_config_playwright_browsers_path
+node scripts/verify/termux/browser.mjs