Skip to content

[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429

Closed
#13828
Closed
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
#13828
Assignees
os-project-manager
Labels
bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3

Description

@zhuangjianguo
zhuangjianguo
opened on Aug 30, 2026

Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.

Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)

Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":

  • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
  • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
  • scripts/pm/check-half-states.mjs:7597
  • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
  • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.

Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.

Why these mislead (measured, #12979 and re-measured on 94efa2a)

  • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
  • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
  • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.

Suggested shape

Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.

Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.

Metadata

Metadata

Assignees

Labels

bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3

Type

No type

Projects

No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions

    , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
     blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
    Skip to content
    [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
    Closed
    #13828
    Closed
    [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
    #13828
    Assignees
    os-project-manager
    Labels
    bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
    Description
    @zhuangjianguo
    zhuangjianguo
    opened on Aug 30, 2026
    Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
    Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
    Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
    • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
    • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
    • scripts/pm/check-half-states.mjs:7597
    • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
    • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
    Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
    Why these mislead (measured, #12979 and re-measured on 94efa2a)
    • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
    • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
    • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
    Suggested shape
    Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
    Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
    Metadata
    Metadata
    Assignees
    Labels
    bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
    Type
    No type
    Projects
    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
      Skip to content
      [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
      Closed
      #13828
      Closed
      [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
      #13828
      Assignees
      os-project-manager
      Labels
      bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
      Description
      @zhuangjianguo
      zhuangjianguo
      opened on Aug 30, 2026
      Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
      Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
      Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
      • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
      • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
      • scripts/pm/check-half-states.mjs:7597
      • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
      • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
      Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
      Why these mislead (measured, #12979 and re-measured on 94efa2a)
      • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
      • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
      • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
      Suggested shape
      Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
      Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
      Metadata
      Metadata
      Assignees
      Labels
      bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
      Type
      No type
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
        Skip to content
        [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
        Closed
        #13828
        Closed
        [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
        #13828
        Assignees
        os-project-manager
        Labels
        bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
        Description
        @zhuangjianguo
        zhuangjianguo
        opened on Aug 30, 2026
        Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
        Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
        Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
        • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
        • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
        • scripts/pm/check-half-states.mjs:7597
        • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
        • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
        Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
        Why these mislead (measured, #12979 and re-measured on 94efa2a)
        • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
        • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
        • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
        Suggested shape
        Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
        Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
        Metadata
        Metadata
        Assignees
        Labels
        bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
          Skip to content
          [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
          Closed
          #13828
          Closed
          [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
          #13828
          Assignees
          os-project-manager
          Labels
          bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
          Description
          @zhuangjianguo
          zhuangjianguo
          opened on Aug 30, 2026
          Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
          Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
          Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
          • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
          • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
          • scripts/pm/check-half-states.mjs:7597
          • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
          • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
          Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
          Why these mislead (measured, #12979 and re-measured on 94efa2a)
          • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
          • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
          • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
          Suggested shape
          Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
          Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
          Metadata
          Metadata
          Assignees
          Labels
          bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
          Type
          No type
          Projects
          No projects
            Milestone
            No milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, '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); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
            Skip to content
            [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
            Closed
            #13828
            Closed
            [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
            #13828
            Assignees
            os-project-manager
            Labels
            bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
            Description
            @zhuangjianguo
            zhuangjianguo
            opened on Aug 30, 2026
            Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
            Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
            Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
            • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
            • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
            • scripts/pm/check-half-states.mjs:7597
            • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
            • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
            Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
            Why these mislead (measured, #12979 and re-measured on 94efa2a)
            • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
            • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
            • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
            Suggested shape
            Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
            Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
            Metadata
            Metadata
            Assignees
            Labels
            bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, '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); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
              Skip to content
              [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
              Closed
              #13828
              Closed
              [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
              #13828
              Assignees
              os-project-manager
              Labels
              bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
              Description
              @zhuangjianguo
              zhuangjianguo
              opened on Aug 30, 2026
              Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
              Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
              Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
              • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
              • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
              • scripts/pm/check-half-states.mjs:7597
              • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
              • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
              Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
              Why these mislead (measured, #12979 and re-measured on 94efa2a)
              • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
              • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
              • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
              Suggested shape
              Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
              Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
              Metadata
              Metadata
              Assignees
              Labels
              bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
              Type
              No type
              Projects
              No projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
// 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 */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.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); }
})();
})();
[finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name `| tail` and leave `| head` — the shape that defeats PIPESTATUS/pipefail — unnamed · Issue #13429 · objectstack-ai/objectstack · GitHub
                Skip to content
                [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed #13429
                Closed
                #13828
                Closed
                [finding] Sibling copies of the wrong-pipe-shape exit-code advisory survive #12979: five more banners name | tail and leave | head — the shape that defeats PIPESTATUS/pipefail — unnamed#13429
                #13828
                Assignees
                os-project-manager
                Labels
                bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
                Description
                @zhuangjianguo
                zhuangjianguo
                opened on Aug 30, 2026
                Filed unassigned by the #12979 dev, session session_01EXxTW8mvPBhoHxmyPZ63de, while fixing that card (PR #13427). Out of scope there: the 2026-08-28 grading on #12979 permitted exactly one cross-domain half (scripts/check-i18n-bundles.mjs); these are the remaining copies of the same wrong fact. #12979 is not addressed here beyond that pointer, and PR #13427 does not touch these files.
                Census (git grep on 9f1652c, the #12979 fix branch head; line numbers from that tree)
                Exact copies of the corrected banner's old text, still claiming | tail -4 "reads green either way":
                • scripts/import-prerequisite.mjs:409 — HIGH LEVERAGE: this is the shared prerequisite-banner module; every gate script that imports it inherits the wrong advisory line verbatim (the printed text interpolates the calling gate's name via scripts/${gate}.mjs).
                • scripts/check-i18n-coverage.mjs:1137, :1192, :1221
                • scripts/pm/check-half-states.mjs:7597
                • scripts/pm/ci-failure.mjs:1540, :2424 (phrased "Piping reports the PIPE's status, so backticked dot-dot-dot pipe tail reads green either way")
                • scripts/check-test-completeness.mjs:481-483 — half-corrected variant: it already says capture the exit code BEFORE any pipe (good), but still names only | tail -4 as the lying shape and leaves | head unnamed.
                Not a copy, do not touch: docs/qa/platform-checklist/areas/attachments-storage.json:359 uses the phrase "reads green either way" about a fixture clause, unrelated to pipes.
                Why these mislead (measured, #12979 and re-measured on 94efa2a)
                • For a reader using bare $? after the pipe, the claim is literally true — $? is the pipe's status.
                • For a reader following the os-dev discipline (now: redirect-then-capture; formerly PIPESTATUS[0]), | tail -4 forwards the TRUE status (measured: 1 on a refusing gate) — so the advisory names the safe shape as the dangerous one.
                • The shape that actually lies to every reader, | head -N, is unnamed in all of these: head closes the read end early, the producer takes EPIPE/SIGPIPE and exits 0, so even PIPESTATUS[0] and set -o pipefail read green (measured: 0 on the same refusing gate). An agent steered away from tail toward head gets the only false green there is.
                Suggested shape
                Same fix the #12979 grading prescribed and PR #13427 applied to check-i18n-bundles.mjs: name the true hazard (| head -N, with the EPIPE mechanism), name the safe capture (redirect-then-capture, exit code taken before any pipe), and do not reduce it to "do not pipe". Fixing scripts/import-prerequisite.mjs:409 corrects every importer in one edit; the literal copies in the other four files need their own lines. Each of those gate scripts has a self-test (--self-test) that must stay green, and none of the edits may change exit codes.
                Severity not judged; the banners only mislead humans and agents reading refusal output — no gate verdict is computed from them.
                Metadata
                Metadata
                Assignees
                Labels
                bugSomething isn't workingdomain:devxpriority:p2Medium: important, M3
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions