OpenCoven · BunsDev · Aug 31, 2026 · Aug 31, 2026 · Aug 31, 2026 · Aug 31, 2026
diff --git a/.prettierignore b/.prettierignore
@@ -8,3 +8,4 @@ registry.json
 pnpm-lock.yaml
 index.html
 Components.dc.html
+contracts
diff --git a/contracts/CHANGELOG.md b/contracts/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Portable interaction contract changelog
+
+## 1.0.0 — 2026-08-30
+
+- Added 14 framework-neutral web primitives.
+- Added stable conformance hooks and shared state vocabulary.
+- Added 24 mutation-guarded keyboard, focus, no-JavaScript, failure, reduced-motion, forced-colors, target-size, and reflow vectors.
+- Added a native-first reference fixture.
diff --git a/contracts/README.md b/contracts/README.md
@@ -0,0 +1,19 @@
+# Portable web interaction contract v1.0.0
+
+`web-interactions.v1.json` is the framework-neutral semantic and interaction contract owned by `OpenCoven/ui`. `test-vectors.v1.json` is the shared conformance suite. `fixtures/reference.html` demonstrates the native-first baseline without importing React, Tailwind, Base UI, or the specimen app.
+
+Visual identity and token values remain owned by `OpenCoven/brand`. Product state, authority, protocol, and runtime behavior remain owned by the corresponding product repositories.
+
+## Stable hooks
+
+Consumers expose `data-oc-primitive`, `data-oc-part`, and optional `data-oc-state` hooks named by the contract. These are testing semantics, not a styling API, and never replace native attributes such as `href`, `open`, `disabled`, `aria-expanded`, `aria-selected`, or `aria-busy`.
+
+## Conformance
+
+Run every applicable vector with JavaScript enabled and disabled, keyboard-only input, 320 px width, 200% zoom/reflow, reduced motion, and forced colors where supported. Each vector returns `pass`, `fail`, or `unsupported-with-reason`; unsupported is never counted as pass.
+
+Ordinary navigation is not an application menu. Mobile navigation is not a modal. Tabs do not perform remote mutation. Tooltips contain no essential or interactive content. Progress is measured, not decorative. Download links remain browser-native; page JavaScript never owns installer bytes. Dialogs are reserved for true modal tasks. Guided proof remains semantic and complete without canvas, WebGL, drag, or motion.
+
+## Versioning
+
+Patch changes clarify wording without changing behavior. Minor changes add backward-compatible primitives, parts, states, or vectors. Major changes remove/rename hooks or alter required keyboard, focus, failure, or progressive-enhancement behavior. Consumers pin an immutable revision and run the shared vectors before updating.
diff --git a/contracts/fixtures/reference.html b/contracts/fixtures/reference.html
@@ -0,0 +1 @@
+<!doctype html><html lang="en" data-theme="system"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="color-scheme" content="light dark"><title>OpenCoven portable interaction reference</title><style>*{box-sizing:border-box}body{margin:0;min-width:20rem;font:1rem/1.55 system-ui}a,button,summary,select,input{min-height:44px}:focus-visible{outline:3px solid CanvasText;outline-offset:3px}header,main{width:min(70rem,calc(100% - 2rem));margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 0}nav a{display:inline-flex;align-items:center;padding:.5rem}section{padding:1.25rem 0;border-top:1px solid currentColor}.proof{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.enhanced [role=tabpanel][hidden]{display:none}@media(max-width:43rem){.desktop{display:none}.proof{grid-template-columns:1fr}}@media(min-width:43.01rem){.mobile{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}</style><script type="module" src="./reference.js"></script></head><body><header><a href="#main" data-oc-part="brand-link">OpenCoven</a><nav class="desktop" aria-label="Primary" data-oc-primitive="global-navigation"><span data-oc-part="primary-links"><a href="#product" aria-current="page">Product</a><a href="#protocol">Protocol</a><a href="#developers">Developers</a><a href="#community">Community</a></span><a href="#start" data-oc-part="primary-action">Start locally</a></nav><details class="mobile" data-oc-primitive="mobile-navigation" data-oc-state="collapsed"><summary data-oc-part="trigger">Menu</summary><nav aria-label="Mobile primary" data-oc-part="panel"><span data-oc-part="links"><a href="#product">Product</a><a href="#protocol">Protocol</a><a href="#developers">Developers</a><a href="#community">Community</a><a href="#start">Start locally</a></span></nav></details></header><main id="main"><h1>Portable interaction reference</h1><section id="start" data-oc-primitive="action"><h2>Actions</h2><a href="#download" data-oc-part="label">Start locally</a> <a href="#protocol">Understand the protocol</a> <button type="button">Quiet operation</button></section><section data-oc-primitive="theme-control"><h2>Theme</h2><label data-oc-part="label" for="theme">Preference</label><select id="theme" data-oc-part="control"><option>system</option><option>light</option><option>dark</option></select></section><section data-oc-primitive="copy-control"><h2>Copy</h2><code data-oc-part="source">npm install -g @opencoven/cli</code> <button hidden type="button" data-oc-part="trigger">Copy</button><span data-oc-part="status" role="status" aria-live="polite" aria-atomic="true"></span></section><section id="product" data-oc-primitive="tabs"><h2>Views</h2><div role="tablist" aria-label="Views" data-oc-part="list"><button role="tab" id="t1" aria-controls="p1" aria-selected="true" tabindex="0" data-oc-part="tab">Overview</button><button role="tab" id="t2" aria-controls="p2" aria-selected="false" tabindex="-1" data-oc-part="tab">Evidence</button></div><section role="tabpanel" id="p1" aria-labelledby="t1" data-oc-part="panel"><h3>Overview</h3><p>Visible without JavaScript.</p></section><section role="tabpanel" id="p2" aria-labelledby="t2" data-oc-part="panel"><h3>Evidence</h3><p>Also visible without JavaScript.</p></section></section><section data-oc-primitive="tooltip"><h2>Help</h2><p>Essential explanation is already visible. <button data-oc-part="trigger" aria-describedby="tip">More</button></p><span id="tip" role="tooltip" data-oc-part="content" hidden>Supplemental detail.</span></section><section data-oc-primitive="status-indicator"><h2>Status</h2><p data-oc-part="label">✓ Verified from a pinned revision</p></section><section data-oc-primitive="progress"><h2>Progress</h2><label data-oc-part="label" for="progress">Verification</label><progress id="progress" data-oc-part="value-or-state" value="2" max="3">2 of 3</progress></section><section id="download" data-oc-primitive="download-chooser"><h2>Download</h2><div data-oc-part="artifact-links"><a href="/download/mac">macOS</a> <a href="/download/windows">Windows</a> <a href="/download/linux">Linux</a></div><p data-oc-part="fallback"><a href="https://github.com/OpenCoven/coven-cave/releases/latest">All release artifacts</a></p></section><section id="protocol" data-oc-primitive="guided-proof"><h2>Identity → authority → execution</h2><fieldset data-oc-part="controls"><legend>Inspect a state</legend><label><input type="radio" name="proof" checked>Identity</label><label><input type="radio" name="proof">Authority</label><label><input type="radio" name="proof">Execution</label></fieldset><p data-oc-part="state-label">All three states remain below.</p><div class="proof" data-oc-part="evidence-region"><article><h3>Identity bound</h3><p>A familiar revision is named.</p></article><article><h3>Authority checked</h3><p>Protected change is permitted, degraded, or rejected.</p></article><article><h3>Execution receipted</h3><p>The runtime records what happened.</p></article></div></section><section><h2>Dialog</h2><a href="#fallback">Read inline</a> or <button data-dialog-open>open modal</button><dialog data-oc-primitive="dialog" aria-labelledby="dialog-title"><h3 id="dialog-title" tabindex="-1" data-oc-part="title">Modal reference</h3><div data-oc-part="content">A true modal contains and restores focus.</div><button data-oc-part="close">Close</button></dialog><div id="fallback"><h3>Inline fallback</h3><p>Available without JavaScript.</p></div></section><section data-oc-primitive="error-surface"><h2 data-oc-part="title">Evidence unavailable</h2><p data-oc-part="description">No verified value was returned, so no zero is shown.</p><p data-oc-part="recovery-or-fallback"><a href="https://github.com/OpenCoven">Inspect source</a></p></section></main></body></html>
diff --git a/contracts/fixtures/reference.js b/contracts/fixtures/reference.js
diff --git a/contracts/test-vectors.v1.json b/contracts/test-vectors.v1.json
@@ -0,0 +1 @@
+{"schemaVersion":"opencoven.ui-test-vectors/v1","contractVersion":"1.0.0","result":"pass|fail|unsupported-with-reason; unsupported is never pass","vectors":[{"id":"NAV-001","primitive":"global-navigation","modes":["js","no-js"],"steps":["inspect landmarks/links"],"assertions":["one named global nav","brand and Start locally are links","one aria-current when represented","no duplicate focusable nav"],"mutationGuard":"remove label or expose duplicate"},{"id":"NAV-002","primitive":"global-navigation","modes":["js","no-js"],"steps":["Tab forward/back","Enter links"],"assertions":["visible focus","reading order","focus exits both directions","href followed"],"mutationGuard":"preventDefault Tab"},{"id":"MOB-001","primitive":"mobile-navigation","modes":["js"],"steps":["open","Tab inside","Escape"],"assertions":["44×44 trigger","open state synced","not modal/inert","Escape closes and restores trigger"],"mutationGuard":"leave expanded or lose focus"},{"id":"MOB-002","primitive":"mobile-navigation","modes":["no-js"],"steps":["open details if used","traverse links"],"assertions":["all destinations present","Start locally present","no script overlay"],"mutationGuard":"hide panel pending JS"},{"id":"MOB-003","primitive":"mobile-navigation","modes":["js"],"steps":["open","outside click","reopen","activate link"],"assertions":["outside closes","inside link navigates once"],"mutationGuard":"backdrop swallows link"},{"id":"ACT-001","primitive":"action","modes":["js","no-js","320px"],"steps":["inspect/activate each"],"assertions":["a for navigation","button for operation","44×44 targets","one filled action"],"mutationGuard":"clickable div or two filled actions"},{"id":"ACT-002","primitive":"action","modes":["js"],"steps":["activate async twice"],"assertions":["one operation","name retained","busy exposed","visible result/recovery"],"mutationGuard":"duplicate request or blank busy label"},{"id":"THEME-001","primitive":"theme-control","modes":["js"],"steps":["select light/dark/system","reload","change OS"],"assertions":["only three stored values","explicit survives","system tracks OS","pre-paint state matches preference"],"mutationGuard":"two-state toggle"},{"id":"THEME-002","primitive":"theme-control","modes":["no-js","forced-colors"],"steps":["load light/dark/high contrast"],"assertions":["system remains legible","content/navigation complete"],"mutationGuard":"hard-code unusable theme"},{"id":"COPY-001","primitive":"copy-control","modes":["js"],"steps":["grant clipboard","activate"],"assertions":["source equals copy","focus retained","Copied visible 2–4s","one polite announcement"],"mutationGuard":"move focus to toast"},{"id":"COPY-002","primitive":"copy-control","modes":["js","no-js"],"steps":["reject clipboard or disable JS"],"assertions":["failure wording","source selectable","no false success","static source visible"],"mutationGuard":"hide source"},{"id":"TABS-001","primitive":"tabs","modes":["js"],"steps":["ArrowRight","End","Home","Tab"],"assertions":["one selected/tabindex0","keys select correctly","matching panel","Tab exits widget"],"mutationGuard":"all tabs tabindex0"},{"id":"TABS-002","primitive":"tabs","modes":["no-js"],"steps":["inspect source order"],"assertions":["every panel visible","each panel labelled"],"mutationGuard":"ship inactive panels hidden"},{"id":"TIP-001","primitive":"tooltip","modes":["js"],"steps":["focus/Escape","hover/leave"],"assertions":["same supplement","tooltip not focusable","control already named","essential text outside"],"mutationGuard":"put link inside tooltip"},{"id":"STATUS-001","primitive":"status-indicator","modes":["js","no-js","forced-colors"],"steps":["inspect static/dynamic"],"assertions":["visible wording/non-color cue","routine update polite once","unavailable not zero"],"mutationGuard":"colored dot only"},{"id":"PROGRESS-001","primitive":"progress","modes":["js","reduced-motion"],"steps":["inspect determinate/indeterminate/unavailable"],"assertions":["valid measured value","busy wording","no fabricated percent","motion not required"],"mutationGuard":"hard-code fake 73%"},{"id":"DOWN-001","primitive":"download-chooser","modes":["js","no-js"],"steps":["traverse artifacts/fallback"],"assertions":["ordinary hrefs","all alternatives","activation required","page does not fetch bytes"],"mutationGuard":"fetch/blob installer"},{"id":"DOWN-002","primitive":"download-chooser","modes":["js"],"steps":["fail resolver/stream"],"assertions":["direct release fallback or error surface","no endless retry"],"mutationGuard":"swallow failure"},{"id":"DIALOG-001","primitive":"dialog","modes":["js"],"steps":["open","Tab cycle","Escape"],"assertions":["labelled","initial focus inside","focus contained","background inert","focus restored"],"mutationGuard":"restore to body"},{"id":"DIALOG-002","primitive":"dialog","modes":["no-js"],"steps":["inspect fallback"],"assertions":["content inline or ordinary link","nothing essential modal-only"],"mutationGuard":"hide all dialog content"},{"id":"PROOF-001","primitive":"guided-proof","modes":["js","reduced-motion","320px"],"steps":["select three states"],"assertions":["three named states","non-color selection","labelled evidence","no remote mutation","no WebGL requirement"],"mutationGuard":"canvas-only meaning"},{"id":"PROOF-002","primitive":"guided-proof","modes":["no-js"],"steps":["read sequence"],"assertions":["all three visible","headings/evidence for each"],"mutationGuard":"render first only"},{"id":"ERROR-001","primitive":"error-surface","modes":["js","no-js"],"steps":["render busy/error/unavailable","traverse recovery"],"assertions":["heading/description","fallback/next step","routine update keeps focus","recovery follows action"],"mutationGuard":"blank spinner"},{"id":"REFLOW-001","primitive":"action","modes":["320px","200%-zoom","forced-colors"],"steps":["traverse all controls"],"assertions":["44×44 targets","no overlap","no two-dimensional scroll","focus not obscured","system focus visible"],"mutationGuard":"shrink or hide focused target"}]}
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		<!doctype html><html lang="en" data-theme="system"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="color-scheme" content="light dark"><title>OpenCoven portable interaction reference</title><style>{box-sizing:border-box}body{margin:0;min-width:20rem;font:1rem/1.55 system-ui}a,button,summary,select,input{min-height:44px}:focus-visible{outline:3px solid CanvasText;outline-offset:3px}header,main{width:min(70rem,calc(100% - 2rem));margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 0}nav a{display:inline-flex;align-items:center;padding:.5rem}section{padding:1.25rem 0;border-top:1px solid currentColor}.proof{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.enhanced [role=tabpanel][hidden]{display:none}@media(max-width:43rem){.desktop{display:none}.proof{grid-template-columns:1fr}}@media(min-width:43.01rem){.mobile{display:none}}@media(prefers-reduced-motion:reduce){,:before,:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}</style><script type="module" src="./reference.js"></script></head><body><header><a href="#main" data-oc-part="brand-link">OpenCoven</a><nav class="desktop" aria-label="Primary" data-oc-primitive="global-navigation"><span data-oc-part="primary-links"><a href="#product" aria-current="page">Product</a><a href="#protocol">Protocol</a><a href="#developers">Developers</a><a href="#community">Community</a></span><a href="#start" data-oc-part="primary-action">Start locally</a></nav><details class="mobile" data-oc-primitive="mobile-navigation" data-oc-state="collapsed"><summary data-oc-part="trigger">Menu</summary><nav aria-label="Mobile primary" data-oc-part="panel"><span data-oc-part="links"><a href="#product">Product</a><a href="#protocol">Protocol</a><a href="#developers">Developers</a><a href="#community">Community</a><a href="#start">Start locally</a></span></nav></details></header><main id="main"><h1>Portable interaction reference</h1><section id="start" data-oc-primitive="action"><h2>Actions</h2><a href="#download" data-oc-part="label">Start locally</a> <a href="#protocol">Understand the protocol</a> <button type="button">Quiet operation</button></section><section data-oc-primitive="theme-control"><h2>Theme</h2><label data-oc-part="label" for="theme">Preference</label><select id="theme" data-oc-part="control"><option>system</option><option>light</option><option>dark</option></select></section><section data-oc-primitive="copy-control"><h2>Copy</h2><code data-oc-part="source">npm install -g @opencoven/cli</code> <button hidden type="button" data-oc-part="trigger">Copy</button><span data-oc-part="status" role="status" aria-live="polite" aria-atomic="true"></span></section><section id="product" data-oc-primitive="tabs"><h2>Views</h2><div role="tablist" aria-label="Views" data-oc-part="list"><button role="tab" id="t1" aria-controls="p1" aria-selected="true" tabindex="0" data-oc-part="tab">Overview</button><button role="tab" id="t2" aria-controls="p2" aria-selected="false" tabindex="-1" data-oc-part="tab">Evidence</button></div><section role="tabpanel" id="p1" aria-labelledby="t1" data-oc-part="panel"><h3>Overview</h3><p>Visible without JavaScript.</p></section><section role="tabpanel" id="p2" aria-labelledby="t2" data-oc-part="panel"><h3>Evidence</h3><p>Also visible without JavaScript.</p></section></section><section data-oc-primitive="tooltip"><h2>Help</h2><p>Essential explanation is already visible. <button data-oc-part="trigger" aria-describedby="tip">More</button></p><span id="tip" role="tooltip" data-oc-part="content" hidden>Supplemental detail.</span></section><section data-oc-primitive="status-indicator"><h2>Status</h2><p data-oc-part="label">✓ Verified from a pinned revision</p></section><section data-oc-primitive="progress"><h2>Progress</h2><label data-oc-part="label" for="progress">Verification</label><progress id="progress" data-oc-part="value-or-state" value="2" max="3">2 of 3</progress></section><section id="download" data-oc-primitive="download-chooser"><h2>Download</h2><div data-oc-part="artifact-links"><a href="/download/mac">macOS</a> <a href="/download/windows">Windows</a> <a href="/download/linux">Linux</a></div><p data-oc-part="fallback"><a href="https://github.com/OpenCoven/coven-cave/releases/latest">All release artifacts</a></p></section><section id="protocol" data-oc-primitive="guided-proof"><h2>Identity → authority → execution</h2><fieldset data-oc-part="controls"><legend>Inspect a state</legend><label><input type="radio" name="proof" checked>Identity</label><label><input type="radio" name="proof">Authority</label><label><input type="radio" name="proof">Execution</label></fieldset><p data-oc-part="state-label">All three states remain below.</p><div class="proof" data-oc-part="evidence-region"><article><h3>Identity bound</h3><p>A familiar revision is named.</p></article><article><h3>Authority checked</h3><p>Protected change is permitted, degraded, or rejected.</p></article><article><h3>Execution receipted</h3><p>The runtime records what happened.</p></article></div></section><section><h2>Dialog</h2><a href="#fallback">Read inline</a> or <button data-dialog-open>open modal</button><dialog data-oc-primitive="dialog" aria-labelledby="dialog-title"><h3 id="dialog-title" tabindex="-1" data-oc-part="title">Modal reference</h3><div data-oc-part="content">A true modal contains and restores focus.</div><button data-oc-part="close">Close</button></dialog><div id="fallback"><h3>Inline fallback</h3><p>Available without JavaScript.</p></div></section><section data-oc-primitive="error-surface"><h2 data-oc-part="title">Evidence unavailable</h2><p data-oc-part="description">No verified value was returned, so no zero is shown.</p><p data-oc-part="recovery-or-fallback"><a href="https://github.com/OpenCoven">Inspect source</a></p></section></main></body></html>
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		{"schemaVersion":"opencoven.ui-test-vectors/v1","contractVersion":"1.0.0","result":"pass\|fail\|unsupported-with-reason; unsupported is never pass","vectors":[{"id":"NAV-001","primitive":"global-navigation","modes":["js","no-js"],"steps":["inspect landmarks/links"],"assertions":["one named global nav","brand and Start locally are links","one aria-current when represented","no duplicate focusable nav"],"mutationGuard":"remove label or expose duplicate"},{"id":"NAV-002","primitive":"global-navigation","modes":["js","no-js"],"steps":["Tab forward/back","Enter links"],"assertions":["visible focus","reading order","focus exits both directions","href followed"],"mutationGuard":"preventDefault Tab"},{"id":"MOB-001","primitive":"mobile-navigation","modes":["js"],"steps":["open","Tab inside","Escape"],"assertions":["44×44 trigger","open state synced","not modal/inert","Escape closes and restores trigger"],"mutationGuard":"leave expanded or lose focus"},{"id":"MOB-002","primitive":"mobile-navigation","modes":["no-js"],"steps":["open details if used","traverse links"],"assertions":["all destinations present","Start locally present","no script overlay"],"mutationGuard":"hide panel pending JS"},{"id":"MOB-003","primitive":"mobile-navigation","modes":["js"],"steps":["open","outside click","reopen","activate link"],"assertions":["outside closes","inside link navigates once"],"mutationGuard":"backdrop swallows link"},{"id":"ACT-001","primitive":"action","modes":["js","no-js","320px"],"steps":["inspect/activate each"],"assertions":["a for navigation","button for operation","44×44 targets","one filled action"],"mutationGuard":"clickable div or two filled actions"},{"id":"ACT-002","primitive":"action","modes":["js"],"steps":["activate async twice"],"assertions":["one operation","name retained","busy exposed","visible result/recovery"],"mutationGuard":"duplicate request or blank busy label"},{"id":"THEME-001","primitive":"theme-control","modes":["js"],"steps":["select light/dark/system","reload","change OS"],"assertions":["only three stored values","explicit survives","system tracks OS","pre-paint state matches preference"],"mutationGuard":"two-state toggle"},{"id":"THEME-002","primitive":"theme-control","modes":["no-js","forced-colors"],"steps":["load light/dark/high contrast"],"assertions":["system remains legible","content/navigation complete"],"mutationGuard":"hard-code unusable theme"},{"id":"COPY-001","primitive":"copy-control","modes":["js"],"steps":["grant clipboard","activate"],"assertions":["source equals copy","focus retained","Copied visible 2–4s","one polite announcement"],"mutationGuard":"move focus to toast"},{"id":"COPY-002","primitive":"copy-control","modes":["js","no-js"],"steps":["reject clipboard or disable JS"],"assertions":["failure wording","source selectable","no false success","static source visible"],"mutationGuard":"hide source"},{"id":"TABS-001","primitive":"tabs","modes":["js"],"steps":["ArrowRight","End","Home","Tab"],"assertions":["one selected/tabindex0","keys select correctly","matching panel","Tab exits widget"],"mutationGuard":"all tabs tabindex0"},{"id":"TABS-002","primitive":"tabs","modes":["no-js"],"steps":["inspect source order"],"assertions":["every panel visible","each panel labelled"],"mutationGuard":"ship inactive panels hidden"},{"id":"TIP-001","primitive":"tooltip","modes":["js"],"steps":["focus/Escape","hover/leave"],"assertions":["same supplement","tooltip not focusable","control already named","essential text outside"],"mutationGuard":"put link inside tooltip"},{"id":"STATUS-001","primitive":"status-indicator","modes":["js","no-js","forced-colors"],"steps":["inspect static/dynamic"],"assertions":["visible wording/non-color cue","routine update polite once","unavailable not zero"],"mutationGuard":"colored dot only"},{"id":"PROGRESS-001","primitive":"progress","modes":["js","reduced-motion"],"steps":["inspect determinate/indeterminate/unavailable"],"assertions":["valid measured value","busy wording","no fabricated percent","motion not required"],"mutationGuard":"hard-code fake 73%"},{"id":"DOWN-001","primitive":"download-chooser","modes":["js","no-js"],"steps":["traverse artifacts/fallback"],"assertions":["ordinary hrefs","all alternatives","activation required","page does not fetch bytes"],"mutationGuard":"fetch/blob installer"},{"id":"DOWN-002","primitive":"download-chooser","modes":["js"],"steps":["fail resolver/stream"],"assertions":["direct release fallback or error surface","no endless retry"],"mutationGuard":"swallow failure"},{"id":"DIALOG-001","primitive":"dialog","modes":["js"],"steps":["open","Tab cycle","Escape"],"assertions":["labelled","initial focus inside","focus contained","background inert","focus restored"],"mutationGuard":"restore to body"},{"id":"DIALOG-002","primitive":"dialog","modes":["no-js"],"steps":["inspect fallback"],"assertions":["content inline or ordinary link","nothing essential modal-only"],"mutationGuard":"hide all dialog content"},{"id":"PROOF-001","primitive":"guided-proof","modes":["js","reduced-motion","320px"],"steps":["select three states"],"assertions":["three named states","non-color selection","labelled evidence","no remote mutation","no WebGL requirement"],"mutationGuard":"canvas-only meaning"},{"id":"PROOF-002","primitive":"guided-proof","modes":["no-js"],"steps":["read sequence"],"assertions":["all three visible","headings/evidence for each"],"mutationGuard":"render first only"},{"id":"ERROR-001","primitive":"error-surface","modes":["js","no-js"],"steps":["render busy/error/unavailable","traverse recovery"],"assertions":["heading/description","fallback/next step","routine update keeps focus","recovery follows action"],"mutationGuard":"blank spinner"},{"id":"REFLOW-001","primitive":"action","modes":["320px","200%-zoom","forced-colors"],"steps":["traverse all controls"],"assertions":["44×44 targets","no overlap","no two-dimensional scroll","focus not obscured","system focus visible"],"mutationGuard":"shrink or hide focused target"}]}