fix(sandbox): retain PTY output queued at timeout - #4572

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fix(sandbox): retain PTY output queued at timeout#4572
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Summary

  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output

Testing

  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures

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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py Outdated
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Can you fix all the review comments?

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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
Comment on lines +1068 to +1069
if task is None and not allow_new_read:
return b""

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P2 Badge Keep polling iterator-backed streams in the final probe

When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.

Useful? React with 👍 / 👎.

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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.

The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.

@seratchseratch closed this Aug 31, 2026
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fix(sandbox): retain PTY output queued at timeout - #4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

Comment on lines

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 if task is None and not allow_new_read:
 return b""
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
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Aug 31, 2026
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fix(sandbox): retain PTY output queued at timeout - #4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

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 if task is None and not allow_new_read:
 return b""
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
@ayaangazaliayaangazali
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Aug 27, 2026
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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
closed this
Aug 31, 2026
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fix(sandbox): retain PTY output queued at timeout - #4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

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 return b""
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
@ayaangazaliayaangazali
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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
closed this
Aug 31, 2026
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fix(sandbox): retain PTY output queued at timeout - #4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
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Skip to content
fix(sandbox): retain PTY output queued at timeout - #4572
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hsusul:fix/pty-collector-final-drain
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fix(sandbox): retain PTY output queued at timeout#4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

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 if task is None and not allow_new_read:
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
@ayaangazaliayaangazali
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Aug 27, 2026
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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
closed this
Aug 31, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
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var __m = "*";
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Skip to content
fix(sandbox): retain PTY output queued at timeout - #4572
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hsusul wants to merge 2 commits into
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hsusul:fix/pty-collector-final-drain
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fix(sandbox): retain PTY output queued at timeout#4572
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

Comment on lines

+1068
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+1069

 if task is None and not allow_new_read:
 return b""
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
@ayaangazaliayaangazali
mentioned this pull request
Aug 27, 2026
 Closed

4 tasks
@seratchseratch
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Aug 28, 2026
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@ayaangazaliayaangazali
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Aug 28, 2026

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seratch
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Aug 31, 2026

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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
closed this
Aug 31, 2026
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, 'i');
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// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
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[data-theme="light"], [data-theme="light"],
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.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
fix(sandbox): retain PTY output queued at timeout - #4572
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hsusul wants to merge 2 commits into
openai:mainfrom 
hsusul:fix/pty-collector-final-drain
Closed
fix(sandbox): retain PTY output queued at timeout#4572
hsusul wants to merge 2 commits into
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hsusul:fix/pty-collector-final-drain
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Summary
  • drain shared, E2B, Cloudflare, and Modal PTY collectors after deadline/timeout
  • preserve output queued between the final poll and timeout
  • add a deterministic regression test for timeout-tail output
Testing
  • python -m compileall -q on changed source and test files
  • focused pytest was attempted but this fresh worktree could not import the repository because optional dependency httpx2 was unavailable; dependency sync was blocked by package-index DNS failures
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py
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Can you fix all the review comments?
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Comment threadsrc/agents/extensions/sandbox/modal/sandbox.py

Comment on lines

+1068
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+1069

 if task is None and not allow_new_read:
 return b""
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P2 Badge Keep polling iterator-backed streams in the final probe
When the last regular poll consumes one ready async-iterator chunk, _read_modal_stream clears its task before the deadline check; if another chunk is already buffered, the final probe reaches this branch with task is None and skips it, so that output is still deferred until a later pty_write_stdin call. Keep blocking read() fallbacks disabled, but allow the final probe to start and zero-timeout-poll one __anext__() task for an existing iterator.
Useful? React with 👍 / 👎.
@ayaangazaliayaangazali
mentioned this pull request
Aug 27, 2026
 Closed

4 tasks
@seratchseratch
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Aug 28, 2026
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@ayaangazaliayaangazali
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Aug 28, 2026

Closed

@seratch
seratch
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Aug 31, 2026

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The timeout-tail work is now consolidated in #4738 together with UTF-8 carry and output-settlement ownership. This older PR overlaps that implementation, so I am closing it as superseded.
The remaining verification and fixes will continue in #4738; closing this PR does not mean the fix has shipped.
@seratchseratch
closed this
Aug 31, 2026
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