Active implementation checkpoint — 19 September 2026
Exact upstream heads are WebScene 91fa294f5616f94ba5a24b3b08cdf7307166fc6e and AppScene fe14e7b775d347693d6526b7c4d49c0dca082e52; unchanged Code OSS is 645f29cc3176500b4b5762ba887cf2a7f0ffdf2c. Local vscode-demo is c543d2ca9ff97f3c9e256c5eda4193fad5b53c13 and remains intentionally unpushed with Actions disabled.
Merged Linux exact-device work remains complete through WebScene #654 and AppScene #270. Linux CLIPBOARD/PRIMARY and inbound/outbound Xdnd are merged through WebScene #658 and AppScene #280. CSS animation direction #659/#660 and fill modes #661/#662 are merged. The current-main native compiler failure exposed by #662 is tracked and fixed by #663/#664; generated selectors now preserve compiled namespace-aware compound and attribute data. #666/#667 binds the remaining native test consumer to the namespace-aware compiler API, and #668/#669 restores complete structured selector parity comparisons. #665/#670 implements demand-free animation pause/resume, and #671/#673 enforces parser package size with both ratio and absolute byte budgets, and #672/#678 implements bounded eight-track animation-list coordination; #674/#681 implements zero-time/count semantics, #679/#680/#682 updates the native stale-track contract for inactive authored list slots, and #675/#683 adds bounded translate/scale keyframe sampling and retained paint composition. #684/#685 refreshes the generated Code OSS ledger and exact property identity count exposed by the post-merge main jobs. #676/#686 adds bounded retained ::before/::after animation lifecycle, scoped paint, owner events, cleanup, and demand-free settled state. Full-V8 package portability epic #687 is implemented by #688/#691 for GCC, #689/#692 for MSVC enum/ABI boundaries, #690/#693 for bounded embedded source literals, #694/#695 for const cascade roots, and #696/#697 for native test syntax. #677/#698 adds bounded retained WAAPI with document/element caps, lifecycle settlement, and demand-free inactive states. #699/#700 restores the 384-byte native document footprint by moving WAAPI-only maps and event state behind one lazy auxiliary allocation. #476/#702 adds bounded asynchronous document fetch and stale-generation suppression for dynamically inserted CSS imports, complementing #480/#484 authored-import reflection. #701/#703 adds browser-shaped Worker options, inherited credential policy, final response/CORS enforcement, generation-safe failure, and bounded slot retirement. #704/#705 adds an optional bounded redirect ledger and per-hop Worker status/scheme/loop/downgrade/origin/CORS/credential checks. #706/#707 extracts bounded request-header ABI v5 onto current main; AppScene #281/#282 and vscode-demo #10 populate the ledger in their host providers.
One-agent mode is enforced. The sole implementation agent is implementing bounded interactive reportValidity feedback under #708; no other implementation agent is active. Static fill does not sustain frame demand, and new animation work must preserve that bound without per-frame cascade, selector, or visual-tree churn.
Consolidations remain open and unmerged: WebScene #76 at b1f4977691938e636c1e16ac1c2f37c4d2128f4c, AppScene #65 at 0c018306458050a66a19d2c84abd3cf65a20832c, and vscode-demo #1. WebScene #662 and #681 portable V8 contracts passed. Focused #682 native document and Linux SDK runs 35448768204 and 35448768281 passed; #683 portable V8 contracts passed. The failed #683 current-main generated-ledger/property-count gates are repaired by #684/#685, and Linux CI job 105914816775 passed. Full-V8 Linux/Windows RID portability repairs are merged through #691-#697; current-main CI/NuGet runs 35454910272 and 35454910266 are retained; superseded PR, previous-main, and consolidation runs were cancellation-requested. AppScene #282 current-main companion run 35454940645 passed.
Ordered next work: #708 interactive validity feedback, then current-main CI/package triage and the remaining focused CSS and acceptance backlog, then physical Linux pixels, synchronization/device-loss/resize/soak/performance, VM/computer-use, and unchanged Code OSS Release qualification. Rich clipboard MIME, MULTIPLE/SAVE_TARGETS, and the recorded desktop-service/cross-platform backlog remain open.
Parent: #81
Release epic: #227
Required by: SceneTech/AppScene#281
Existing implementation source: branch feature/top-level-navigation-session, commit 5f10adf6a45db425886b599e175a414daf0cdfeb by Dan Walmsley
Problem
AppScene main's resource provider already consumes webscene_resource_request_context_v5 and its request-header array, but WebScene main currently publishes only request context v4. The needed implementation exists inside an older multi-feature branch with no pull request and cannot be consumed safely by current main or the #705 redirect-ledger integration.
Scope
Constraints
Do not duplicate or rewrite the existing implementation, import the rest of feature/top-level-navigation-session, or change Code OSS. No browser/CEF/Electron/WebView dependency.
Deferred validation
Under the implementation-first directive, the extracted implementation may merge after diff checks. Native/WPT, SDK/package, cross-platform, lifecycle, memory, performance, and unchanged Code OSS acceptance remain under #81/#227.
Active implementation checkpoint — 19 September 2026
Exact upstream heads are WebScene
91fa294f5616f94ba5a24b3b08cdf7307166fc6eand AppScenefe14e7b775d347693d6526b7c4d49c0dca082e52; unchanged Code OSS is645f29cc3176500b4b5762ba887cf2a7f0ffdf2c. Local vscode-demo isc543d2ca9ff97f3c9e256c5eda4193fad5b53c13and remains intentionally unpushed with Actions disabled.Merged Linux exact-device work remains complete through WebScene #654 and AppScene #270. Linux CLIPBOARD/PRIMARY and inbound/outbound Xdnd are merged through WebScene #658 and AppScene #280. CSS animation direction #659/#660 and fill modes #661/#662 are merged. The current-main native compiler failure exposed by #662 is tracked and fixed by #663/#664; generated selectors now preserve compiled namespace-aware compound and attribute data. #666/#667 binds the remaining native test consumer to the namespace-aware compiler API, and #668/#669 restores complete structured selector parity comparisons. #665/#670 implements demand-free animation pause/resume, and #671/#673 enforces parser package size with both ratio and absolute byte budgets, and #672/#678 implements bounded eight-track animation-list coordination; #674/#681 implements zero-time/count semantics, #679/#680/#682 updates the native stale-track contract for inactive authored list slots, and #675/#683 adds bounded translate/scale keyframe sampling and retained paint composition. #684/#685 refreshes the generated Code OSS ledger and exact property identity count exposed by the post-merge main jobs. #676/#686 adds bounded retained
::before/::afteranimation lifecycle, scoped paint, owner events, cleanup, and demand-free settled state. Full-V8 package portability epic #687 is implemented by #688/#691 for GCC, #689/#692 for MSVC enum/ABI boundaries, #690/#693 for bounded embedded source literals, #694/#695 for const cascade roots, and #696/#697 for native test syntax. #677/#698 adds bounded retained WAAPI with document/element caps, lifecycle settlement, and demand-free inactive states. #699/#700 restores the 384-byte native document footprint by moving WAAPI-only maps and event state behind one lazy auxiliary allocation. #476/#702 adds bounded asynchronous document fetch and stale-generation suppression for dynamically inserted CSS imports, complementing #480/#484 authored-import reflection. #701/#703 adds browser-shaped Worker options, inherited credential policy, final response/CORS enforcement, generation-safe failure, and bounded slot retirement. #704/#705 adds an optional bounded redirect ledger and per-hop Worker status/scheme/loop/downgrade/origin/CORS/credential checks. #706/#707 extracts bounded request-header ABI v5 onto current main; AppScene #281/#282 and vscode-demo #10 populate the ledger in their host providers.One-agent mode is enforced. The sole implementation agent is implementing bounded interactive reportValidity feedback under #708; no other implementation agent is active. Static fill does not sustain frame demand, and new animation work must preserve that bound without per-frame cascade, selector, or visual-tree churn.
Consolidations remain open and unmerged: WebScene #76 at
b1f4977691938e636c1e16ac1c2f37c4d2128f4c, AppScene #65 at0c018306458050a66a19d2c84abd3cf65a20832c, and vscode-demo #1. WebScene #662 and #681 portable V8 contracts passed. Focused #682 native document and Linux SDK runs35448768204and35448768281passed; #683 portable V8 contracts passed. The failed #683 current-main generated-ledger/property-count gates are repaired by #684/#685, and Linux CI job105914816775passed. Full-V8 Linux/Windows RID portability repairs are merged through #691-#697; current-main CI/NuGet runs35454910272and35454910266are retained; superseded PR, previous-main, and consolidation runs were cancellation-requested. AppScene #282 current-main companion run35454940645passed.Ordered next work: #708 interactive validity feedback, then current-main CI/package triage and the remaining focused CSS and acceptance backlog, then physical Linux pixels, synchronization/device-loss/resize/soak/performance, VM/computer-use, and unchanged Code OSS Release qualification. Rich clipboard MIME, MULTIPLE/SAVE_TARGETS, and the recorded desktop-service/cross-platform backlog remain open.
Parent: #81
Release epic: #227
Required by: SceneTech/AppScene#281
Existing implementation source: branch
feature/top-level-navigation-session, commit5f10adf6a45db425886b599e175a414daf0cdfebby Dan WalmsleyProblem
AppScene main's resource provider already consumes
webscene_resource_request_context_v5and its request-header array, but WebScene main currently publishes only request context v4. The needed implementation exists inside an older multi-feature branch with no pull request and cannot be consumed safely by current main or the #705 redirect-ledger integration.Scope
Constraints
Do not duplicate or rewrite the existing implementation, import the rest of
feature/top-level-navigation-session, or change Code OSS. No browser/CEF/Electron/WebView dependency.Deferred validation
Under the implementation-first directive, the extracted implementation may merge after diff checks. Native/WPT, SDK/package, cross-platform, lifecycle, memory, performance, and unchanged Code OSS acceptance remain under #81/#227.