diff --git a/.github/workflows/1874-diagnose.yml b/.github/workflows/1874-diagnose.yml
deleted file mode 100644
index a0e9ee0a01..0000000000
--- a/.github/workflows/1874-diagnose.yml
+++ /dev/null
@@ -1,132 +0,0 @@
-name: 1874 Diagnose
-
-# Under the lane rule in #1781:
-#
-#   - Catches: iOS text-entry commit episodes on CI hardware — the dispatched test looped on both
-#     arches, with and without the neighbour test that shares the simulator. An absorbed episode
-#     surfaces as a slow pass, so the cadence is kept for passes too.
-#   - Evidence: the 2026-08-21 dispatch passed 50/50 and still caught an episode (`type-all`
-#     2487 ms across 5 polls) that no PR lane would report; it does not reproduce locally.
-#   - Cost: manual dispatch and the `diagnose/1874-commit-stall` branch only — never a PR or `main`.
-#     One dispatch is four macOS slots, each a runner build plus `iterations` iterations of
-#     simulator time.
-#   - Kill criterion: delete when #2080 closes. It is the last open text-entry question this loop
-#     is the CI reproduction path for, and nothing else reads these artifacts.
-
-on:
-  workflow_dispatch:
-    inputs:
-      iterations:
-        description: 'Loop iterations per job'
-        required: false
-        default: '25'
-      test:
-        description: 'RunnerTests method to loop'
-        required: false
-        default: testBareTypeUsesTappedInputWhenSoftwareKeyboardIsHidden
-  push:
-    branches:
-      - diagnose/1874-commit-stall
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  stall-loop:
-    name: ${{ matrix.arch }} ${{ matrix.mode }} stall loop
-    runs-on: macos-26
-    timeout-minutes: 90
-    strategy:
-      fail-fast: false
-      matrix:
-        mode: [isolated, pair]
-        arch: [x86_64, arm64]
-    env:
-      IOS_RUNTIME_VERSION: '26.2'
-      AGENT_DEVICE_IOS_RUNNER_DERIVED_PATH: ${{ github.workspace }}/.tmp/ios-runner-derived
-      AGENT_DEVICE_XCUITEST_INCLUDE_UNIT_TESTS: '1'
-      AGENT_DEVICE_XCUITEST_ARCHS: ${{ matrix.arch }}
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup toolchain
-        uses: ./.github/actions/setup-node-pnpm
-
-      - name: Restore and build iOS XCTest runner
-        uses: ./.github/actions/setup-apple-runner-build
-        with:
-          derived-path: ${{ env.AGENT_DEVICE_IOS_RUNNER_DERIVED_PATH }}
-          cache-key-prefix: ios-runner-prebuilt
-          cache-key-suffix: -ios-${{ env.IOS_RUNTIME_VERSION }}-1874-${{ matrix.arch }}
-          gate: swift-runner-ios
-          xcuitest-platform: ios
-          xcuitest-destination: generic/platform=iOS Simulator
-
-      - name: Boot iOS test simulator
-        id: ios-simulator
-        uses: ./.github/actions/boot-ios-test-simulator
-        with:
-          runtime-version: ${{ env.IOS_RUNTIME_VERSION }}
-          preferred-device-name: iPhone 17 Pro
-
-      - name: Stall loop
-        env:
-          ITERATIONS_INPUT: ${{ github.event.inputs.iterations }}
-          TEST_INPUT: ${{ github.event.inputs.test }}
-        run: |
-          set -euo pipefail
-          XCTESTRUN_PATH="$(find "$AGENT_DEVICE_IOS_RUNNER_DERIVED_PATH/Build/Products" -maxdepth 1 -name '*.xctestrun' -print -quit)"
-          test -n "$XCTESTRUN_PATH"
-          UDID="${{ steps.ios-simulator.outputs.simulator-udid }}"
-          ITER="${ITERATIONS_INPUT:-25}"
-          TEST_NAME="${TEST_INPUT:-testBareTypeUsesTappedInputWhenSoftwareKeyboardIsHidden}"
-          mkdir -p .tmp
-
-          if [ "${{ matrix.mode }}" = "pair" ]; then
-            EXTRA_ONLY_TESTING=(-only-testing:AgentDeviceRunnerUITests/RunnerTests/testBareDelayedTypeFailsWhenTappedInputDisappearsMidCommand)
-          else
-            EXTRA_ONLY_TESTING=()
-          fi
-
-          sys_prof="$(system_profiler SPHardwareDataType 2>/dev/null | grep -E 'Chip|Cores|Memory' || true)"
-          echo "HOST: $sys_prof" | tee stall-summary.txt
-
-          pass=0; skipped=0; failed=0; noresult=0; runfailed=0
-          for i in $(seq 1 "$ITER"); do
-            LOG=".tmp/stall-run-$i.log"
-            set +e
-            xcodebuild test-without-building \
-              -xctestrun "$XCTESTRUN_PATH" \
-              -destination "platform=iOS Simulator,id=$UDID" \
-              -only-testing:"AgentDeviceRunnerUITests/RunnerTests/$TEST_NAME" \
-              ${EXTRA_ONLY_TESTING[@]+"${EXTRA_ONLY_TESTING[@]}"} \
-              > "$LOG" 2>&1
-            rc=$?
-            set -e
-            verdict="$(node --experimental-strip-types scripts/diagnose-1874-iteration.ts \
-              "$LOG" "$TEST_NAME" "$i" "$rc")"
-            case "$verdict" in
-              passed) pass=$((pass+1)) ;;
-              skipped) skipped=$((skipped+1)) ;;
-              no-result) noresult=$((noresult+1)) ;;
-              run-failed) runfailed=$((runfailed+1)) ;;
-              *) failed=$((failed+1)) ;;
-            esac
-          done
-
-          echo "RESULT arch=${{ matrix.arch }} mode=${{ matrix.mode }}: $pass passed, $skipped skipped, $failed failed, $noresult no-result, $runfailed run-failed of $ITER" | tee -a stall-summary.txt
-
-      - name: Upload stall evidence
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: stall-evidence-${{ matrix.arch }}-${{ matrix.mode }}
-          include-hidden-files: true
-          path: |
-            stall-summary.txt
-            .tmp/stall-evidence-*.log
-          if-no-files-found: ignore
diff --git a/scripts/__tests__/diagnose-1874-iteration.test.ts b/scripts/__tests__/diagnose-1874-iteration.test.ts
deleted file mode 100644
index 350fdf21eb..0000000000
--- a/scripts/__tests__/diagnose-1874-iteration.test.ts
+++ /dev/null
@@ -1,157 +0,0 @@
-import { execFileSync } from 'node:child_process';
-import fs from 'node:fs';
-import os from 'node:os';
-import path from 'node:path';
-import { fileURLToPath } from 'node:url';
-import { expect, test } from 'vitest';
-import { readIteration, type IterationReport } from '../diagnose-1874-iteration.ts';
-
-const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '../..');
-const script = path.join(root, 'scripts/diagnose-1874-iteration.ts');
-const WORKFLOW = path.join(root, '.github/workflows/1874-diagnose.yml');
-const NAME = 'testBareTypeUsesTappedInputWhenSoftwareKeyboardIsHidden';
-const POLL = '[DEBUG-1874] poll t=1ms observedLen=0 expectedPrefixLen=0';
-const CADENCE = [
-  '[DEBUG-1874] wait start expectedLen=17',
-  POLL,
-  '[DEBUG-1874] wait outcome=settled',
-];
-
-const verdictLine = (test: string, word: string) =>
-  `Test Case '-[X.RunnerTests ${test}]' ${word} (1.0 seconds).`;
-const phases = (typeAllMs: string) =>
-  [
-    `phase=focus durationMs=644.6`,
-    `phase=type-all durationMs=${typeAllMs}`,
-    `phase=total durationMs=7379.7`,
-  ].map((phase) => `AGENT_DEVICE_RUNNER_TEXT_ENTRY_PHASE commandId=c ${phase} chars=17`);
-
-const SHAPES: readonly (Partial<IterationReport> & { name: string; log: string[]; rc?: number })[] =
-  [
-    {
-      name: 'healthy pass',
-      log: [verdictLine(NAME, 'passed'), ...phases('796.1'), ...CADENCE],
-      verdict: 'passed',
-      keepEvidence: false,
-      lines: ['iter=1 verdict=passed rc=0 durationMs=796.1 polls=1'],
-    },
-    {
-      name: 'slow pass — an absorbed episode, which is the evidence #1874 wants',
-      log: [verdictLine(NAME, 'passed'), ...phases('14146.4'), ...CADENCE],
-      verdict: 'passed',
-      keepEvidence: true,
-      lines: ['iter=1 verdict=passed rc=0 durationMs=14146.4 polls=1', ...CADENCE],
-    },
-    {
-      name: 'a pass a tenth of a millisecond over the slow threshold is still slow',
-      log: [verdictLine(NAME, 'passed'), ...phases('2000.1'), ...CADENCE],
-      verdict: 'passed',
-      keepEvidence: true,
-    },
-    {
-      name: 'skipped — an environment flip, not a stall',
-      log: [verdictLine(NAME, 'skipped')],
-      verdict: 'skipped',
-      keepEvidence: true,
-      lines: ['iter=1 verdict=skipped rc=0 durationMs=0 polls=0'],
-    },
-    {
-      name: 'no verdict at all — ours to own, not the product’s',
-      log: ['Executed 0 tests, with 0 failures (0 unexpected) in 0.000 seconds'],
-      verdict: 'no-result',
-      keepEvidence: true,
-    },
-    {
-      name: 'a verdict word this loop does not model is not a stall either',
-      log: [verdictLine(NAME, 'errored')],
-      verdict: 'no-result',
-    },
-    {
-      name: 'pair mode — the neighbour test logs first',
-      log: [
-        verdictLine('testBareDelayedTypeFailsWhenTappedInputDisappearsMidCommand', 'passed'),
-        'AGENT_DEVICE_RUNNER_TEXT_ENTRY_PHASE commandId=n phase=type-all durationMs=5000.0 chars=17',
-        verdictLine(NAME, 'passed'),
-        ...phases('812.0'),
-      ],
-      verdict: 'passed',
-      keepEvidence: false,
-    },
-    {
-      name: 'restarted — the final word is the outcome',
-      log: [verdictLine(NAME, 'failed'), ...phases('900.0'), verdictLine(NAME, 'passed')],
-      verdict: 'passed',
-      keepEvidence: false,
-    },
-    {
-      name: 'measured test passed, xcodebuild did not',
-      log: [verdictLine(NAME, 'passed'), ...phases('796.1'), ...CADENCE],
-      rc: 65,
-      verdict: 'run-failed',
-      keepEvidence: true,
-    },
-    {
-      name: 'louder than the cadence cap',
-      log: [verdictLine(NAME, 'failed'), ...Array.from({ length: 45 }, () => POLL)],
-      verdict: 'failed',
-      keepEvidence: true,
-      lines: [
-        'iter=1 verdict=failed rc=0 durationMs=0 polls=45',
-        ...Array.from({ length: 40 }, () => POLL),
-        '… 5 more DEBUG-1874 lines (full log in the artifact)',
-      ],
-    },
-  ];
-
-test.each(SHAPES)('reads a $name iteration', (shape) => {
-  const report = readIteration(shape.log.join('\n'), NAME, 1, shape.rc ?? 0);
-  expect(report.verdict).toBe(shape.verdict);
-  if (shape.keepEvidence !== undefined) expect(report.keepEvidence).toBe(shape.keepEvidence);
-  if (shape.lines) expect(report.lines).toEqual(shape.lines);
-});
-
-test('the workflow forwards the exit status xcodebuild actually returned', () => {
-  const workflow = fs.readFileSync(WORKFLOW, 'utf8');
-  expect(workflow).toContain('rc=$?');
-  expect(workflow).toMatch(/diagnose-1874-iteration\.ts \\\n\s*"\$LOG" "\$TEST_NAME" "\$i" "\$rc"/);
-});
-
-test('the test name is matched literally, not as a pattern', () => {
-  const log = verdictLine('testAXB', 'passed');
-  expect(readIteration(log, 'testA.B', 1, 0).verdict).toBe('no-result');
-  expect(readIteration(log, 'testAXB', 1, 0).verdict).toBe('passed');
-});
-
-test.each([
-  { label: 'slow pass', rc: 0, verdict: 'passed' },
-  { label: 'nonzero exit over a green measured test', rc: 65, verdict: 'run-failed' },
-])(
-  'the entry point writes, keeps evidence and prints the verdict for a $label',
-  ({ rc, verdict }) => {
-    const cwd = fs.mkdtempSync(path.join(os.tmpdir(), 'diagnose-1874-'));
-    try {
-      fs.mkdirSync(path.join(cwd, '.tmp'));
-      const log = path.join(cwd, 'iteration.log');
-      fs.writeFileSync(
-        log,
-        [verdictLine(NAME, 'passed'), ...phases('14146.4'), ...CADENCE].join('\n'),
-      );
-
-      const printed = execFileSync(
-        process.execPath,
-        ['--experimental-strip-types', script, log, NAME, '7', `${rc}`],
-        { cwd, encoding: 'utf8' },
-      );
-
-      expect(printed).toBe(verdict);
-      expect(fs.readFileSync(path.join(cwd, 'stall-summary.txt'), 'utf8')).toBe(
-        [`iter=7 verdict=${verdict} rc=${rc} durationMs=14146.4 polls=1`, ...CADENCE, ''].join(
-          '\n',
-        ),
-      );
-      expect(fs.existsSync(path.join(cwd, '.tmp', 'stall-evidence-7.log'))).toBe(true);
-    } finally {
-      fs.rmSync(cwd, { recursive: true, force: true });
-    }
-  },
-);
diff --git a/scripts/diagnose-1874-iteration.ts b/scripts/diagnose-1874-iteration.ts
deleted file mode 100644
index 6913042a4d..0000000000
--- a/scripts/diagnose-1874-iteration.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-import fs from 'node:fs';
-import path from 'node:path';
-import { pathToFileURL } from 'node:url';
-
-const SLOW_PASS_MS = 2000;
-const CADENCE_LIMIT = 40;
-const SUMMARY = 'stall-summary.txt';
-const EVIDENCE_DIR = '.tmp';
-
-type MeasuredVerdict = 'passed' | 'skipped' | 'failed';
-
-export type IterationReport = {
-  readonly verdict: MeasuredVerdict | 'no-result' | 'run-failed';
-  readonly keepEvidence: boolean;
-  readonly lines: readonly string[];
-};
-
-export function readIteration(
-  log: string,
-  testName: string,
-  iteration: number,
-  rc: number,
-): IterationReport {
-  const lines = log.split('\n');
-  const marker = `${testName}]' `;
-  const word = lines
-    .filter((line) => line.includes(marker))
-    .map((line) => line.slice(line.indexOf(marker) + marker.length).split(' ')[0])
-    .at(-1);
-  const measured = isMeasuredVerdict(word) ? word : 'no-result';
-  const exitContradictsMeasured = rc !== 0 && measured !== 'failed' && measured !== 'no-result';
-  const verdict = exitContradictsMeasured ? 'run-failed' : measured;
-  const durationMs = Number(
-    lines
-      .flatMap((line) => /phase=type-all durationMs=(\d+(?:\.\d+)?)/.exec(line)?.[1] ?? [])
-      .at(-1) ?? 0,
-  );
-  const cadence = lines.filter((line) => line.includes('[DEBUG-1874]'));
-  const keepEvidence = verdict !== 'passed' || durationMs > SLOW_PASS_MS;
-
-  const polls = cadence.filter((line) => line.includes('] poll')).length;
-  const summary = `iter=${iteration} verdict=${verdict} rc=${rc} durationMs=${durationMs} polls=${polls}`;
-  const dropped = cadence.length - CADENCE_LIMIT;
-  return {
-    verdict,
-    keepEvidence,
-    lines: !keepEvidence
-      ? [summary]
-      : [
-          summary,
-          ...cadence.slice(0, CADENCE_LIMIT),
-          ...(dropped > 0 ? [`… ${dropped} more DEBUG-1874 lines (full log in the artifact)`] : []),
-        ],
-  };
-}
-
-function isMeasuredVerdict(word: string | undefined): word is MeasuredVerdict {
-  return word === 'passed' || word === 'skipped' || word === 'failed';
-}
-
-function main(): number {
-  const [logPath, testName, iteration, rc] = process.argv.slice(2);
-  if (!logPath || !testName || !iteration || !rc) {
-    throw new Error('usage: diagnose-1874-iteration.ts <log> <testName> <iteration> <rc>');
-  }
-  const report = readIteration(
-    fs.readFileSync(logPath, 'utf8'),
-    testName,
-    Number(iteration),
-    Number(rc),
-  );
-  fs.appendFileSync(SUMMARY, `${report.lines.join('\n')}\n`);
-  if (report.keepEvidence) {
-    fs.copyFileSync(logPath, path.join(EVIDENCE_DIR, `stall-evidence-${iteration}.log`));
-  }
-  process.stdout.write(report.verdict);
-  return 0;
-}
-
-if (import.meta.url === pathToFileURL(process.argv[1] ?? '').href) process.exit(main());
diff --git a/vitest.config.ts b/vitest.config.ts
index 4482f235e2..77b2793122 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -163,7 +163,6 @@ export default defineConfig({
             // Parses CI configuration only, so this action guard needs no device or subprocess lane.
             'test/ci/upload-agent-device-artifacts.test.ts',
             'test/ci/upload-artifact-hidden-paths.test.ts',
-            'scripts/__tests__/diagnose-1874-iteration.test.ts',
             // The size reporter is preserved across a base checkout; its entrypoint and imported
             // modules must move as one directory or the Bundle Size lane fails before measuring.
             'test/ci/size-workflow.test.ts',