Slate AR perfect regression sweep

Objective: Perfect Slate v2 regression sweep for huge document, virtualization, and new examples; fix found regressions or record explicit deferrals with proof.

Goal plan: docs/plans/2026-06-02-slate-ar-perfect-regression-sweep.md

Template: docs/plans/templates/task.md

Primary template: docs/plans/templates/task.md

Applied packs:

browser (docs/plans/templates/packs/browser.md)

Task source:

type: chat request
id / link: current Codex thread
title: slate-ar-perfect: find regressions in huge document / virtualization / new examples
acceptance criteria: focused AR status, quality scan, behavior gates, perf gates, concrete fixes for P0/P1 regressions found, and final goal-plan check.

Completion threshold:

Current Slate AR status is read from .tmp/slate-v2.
Focused regression scan covers huge document, virtualization, and new examples.
Focused browser/editor behavior gates run for the affected examples, or are marked N/A with evidence.
Focused perf gates run for huge document / virtualization, or are marked N/A with evidence.
Concrete P0/P1 regressions found in scope are fixed with tests or explicitly deferred with blocker/evidence.
Task closure is legal only when the source-of-truth acceptance criteria are satisfied or explicitly narrowed, required verification evidence is recorded, code-review and release-artifact gates are closed when applicable, tracker/PR sync is complete or marked N/A with reason, and node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-02-slate-ar-perfect-regression-sweep.md passes.

Verification surface:

.tmp/slate-v2 AR state and focused benchmark/test commands discovered from current scripts.
Focused Playwright/example gates for huge-document, pagination/virtualization, and new examples.
bun check in .tmp/slate-v2 if source changes land.
Browser proof for the relevant localhost examples if code/UI changes land and a dev server is usable.
node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-02-slate-ar-perfect-regression-sweep.md.

Constraints:

Preserve existing user-facing behavior outside the task scope.
Prefer the durable ownership boundary over caller-by-caller patches.
Do not create PRs, comments, commits, or pushes unless the task/user/skill requires them.
Do not add broad ceremony when the task is trivial or docs-only.

Boundaries:

Source of truth: /Users/zbeyens/git/plate-2/.tmp/slate-v2 for Slate runtime/examples/tests; /Users/zbeyens/git/plate-2/.agents/rules only if skill workflow bugs are discovered.
Allowed edit scope: Slate v2 source, tests, examples, and local AR notes needed for this sweep.
Browser surface: /examples/huge-document, /examples/pagination, and any new example with a discovered regression.
Tracker sync: N/A, no issue/Linear/PR requested.
Non-goals: no commit, push, PR, or autoresearch-review/* branches; no broad unrelated cleanup.

Output budget strategy:

Use rg with focused patterns and capped output. Use focused test/benchmark commands. Save long benchmark output only when needed; do not stream full integration logs.

Blocked condition:

Block only if the owning checkout cannot run focused gates after one local-env retry, a required browser/dev-server surface is unavailable, or a regression requires a public API decision that needs user choice.

Task state:

task_type: regression sweep
task_complexity: high
current_phase: closeout
current_phase_status: complete
next_phase: final response
goal_status: ready-to-complete

Current verdict:

verdict: complete
confidence: high
next owner: user
reason: Focused behavior/perf gates passed after two benchmark-contract fixes and one stale stress oracle fix.

Completion rule:

Do not call update_goal(status: complete) while any required checklist item remains unchecked. If an item does not apply, check it and add N/A: <reason>.
Do not call update_goal(status: complete) until every completion threshold above is satisfied, final handoff evidence is recorded, and node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-02-slate-ar-perfect-regression-sweep.md passes.
Do not create hook state for this goal. This file plus the active goal are the durable state.

Start Gates:

Gate	Applies	Evidence
Skill analysis before edits	yes	Read `slate-ar-perfect`, `slate-ar-quality`, `slate-ar-gate`, and `slate-ar-perf`; routed status -> gates -> patch -> perf.
Active goal checked or created	yes	Created active Autogoal for this sweep.
Source of truth read before edits	yes	Read `.tmp/slate-v2` package scripts, focused Playwright tests, benchmark scripts, and examples.
Tracker comments and attachments read	N/A	Chat request only; no issue tracker item.
Video transcript evidence required	N/A	No new video evidence requested for this pass.
`docs/solutions` checked for non-trivial existing-code work	N/A	Regression sweep used current tests/benchmarks; no solution archaeology needed.
TDD decision before behavior change or bug fix	yes	Existing failing gates were used as red tests before each patch.
Branch decision for code-changing task	yes	Stayed in existing checkout/branch; no review branch by skill policy.
Release artifact decision	N/A	Test/benchmark-only fixes; no package release artifact.
Browser tool decision for browser surface	yes	Used Playwright gates instead of manual browser proof because the behavior is already encoded as browser tests.
PR expectation decision	N/A	User did not request PR.
Tracker sync expectation decision	N/A	No tracker sync requested.
Output budget strategy recorded	yes	Used focused `rg`, focused Playwright, and capped command output.
Browser pack selected	yes	Browser pack applied through Playwright/browser benchmark gates.
Browser route / app surface identified	yes	`/examples/huge-document`, `/examples/pagination`, and `/examples/editable-voids`.
Browser tool decision recorded	yes	Focused Playwright gates are the proof surface.
Console/network caveat policy recorded	yes	Playwright failures/traces checked; no separate console/network audit needed for test-only fixes.

Work Checklist:

Completion Gates:

Gate	Applies	Required action	Evidence
Named verification threshold	yes	Run focused behavior, perf, and check gates	45/45 focused Chromium gate passed; pagination perf benchmark passed; huge-doc smoke passed; `bun check` passed.
Bug reproduced before fix	yes	Reproduce failing gates before patching	Reproduced stale editable-voids stress oracle, pagination benchmark dev-mode failure, and huge-doc overlay smoke warmup failure.
Targeted behavior verification	yes	Rerun focused proof for changed behavior	Exact editable-voids stress case passed; 45/45 focused browser regression gate passed.
TypeScript or typed config changed	yes	Run relevant typecheck	`bun check` ran package/site/root typecheck successfully.
Package exports or file layout changed	N/A	No package exports or file layout changed	No barrels needed.
Package manifests, lockfile, or install graph changed	N/A	No manifest/install graph changes	No install needed.
Agent rules or skills changed	N/A	No agent rules changed in this goal	Skill sync not needed.
Workspace authority proof	yes	Run proof in owning checkout	All proof commands ran in `/Users/zbeyens/git/plate-2/.tmp/slate-v2`.
Browser surface changed	yes	Use browser automation gates	Playwright exercised `/examples/huge-document`, `/examples/pagination`, and `/examples/editable-voids`.
Browser final proof	yes	Record exact browser proof caveat	Browser proof is Playwright output/traces, not manual screenshot.
CI-controlled template output changed	N/A	No template output touched	N/A.
Package behavior or public API changed	N/A	No public API/runtime behavior changed	Test/benchmark contract fixes only.
Registry-only component work changed	N/A	No registry work	N/A.
Docs or content changed	N/A	Goal plan only	No docs/product content changed.
High-risk mini gate	yes	Record failure mode and chosen boundary	Fixed benchmark/test contract drift instead of runtime; behavior gates prove runtime was not regressed.
Agent-native review for agent/tooling changes	N/A	No agent/tooling files changed in this goal	N/A.
Local install corruption suspected	N/A	No install-corruption signal	N/A.
Autoreview for non-trivial implementation changes	N/A	User asked to stop autoreviews earlier; this pass used focused gates instead	Deferred by standing user direction.
PR create or update	N/A	No PR requested	N/A.
Task-style PR body verified	N/A	No PR requested	N/A.
PR proof image hosting	N/A	No PR requested	N/A.
Tracker sync-back	N/A	No tracker requested	N/A.
Final handoff contract	yes	Fill exact final evidence	Filled below.
Final lint	yes	Run fast repo lint/check equivalent	`bun check` includes lint; one existing warning, zero errors.
Output budget discipline	yes	Avoid unbounded output	Outputs were capped; broad accidental 95-test run was kept as useful evidence and recorded.
Goal plan complete	yes	Run completion checker	Run after this closeout update.
Browser interaction proof	yes	Exercise target routes via Playwright	45 focused Chromium tests passed.
Browser console/network check	N/A	No manual route proof; test failures/traces checked	N/A.
Browser final proof artifact	yes	Record artifact paths/commands	Playwright traces emitted only for reproduced failures; final gates passed.

Phase / pass table:

Phase	Status	Evidence	Next
Intake and source read	complete	AR state, package scripts, tests, and benchmarks read	implementation
Implementation	complete	Patched one stale stress oracle and two benchmark contract bugs	verification
Verification	complete	Focused Playwright, perf benchmarks, huge-doc smoke, and `bun check` passed	closeout
PR / tracker sync	N/A	No PR/tracker requested	final response
Closeout	complete	Plan updated; completion check run next	final response

Findings:

Previous AR state for react-huge-document-full is accepted/current: baseline react_huge_doc_full_max_budget_ratio=0.82, source drift clean.
The requested behavior surface is green: 45/45 focused Chromium tests passed for huge document, pagination virtualization, DOM coverage URL controls, and query controls.
Stale stress oracle: editable-voids editable-island-native-focus expected two void shells/spacers while the current example has one initial editable void. Fixed the oracle to the current DOM contract.
Benchmark contract bug: pagination char-burst benchmark measured Next dev mode by default and marked virtualized failed when unrelated staged dev-mode p95 assertions failed. Fixed benchmark default to static/product server and corrected the Bun Playwright invocation.
Benchmark smoke bug: huge-document overlay smoke picked an initially active segment as a hidden warmup placeholder. Fixed warmup selection to exclude the initial active window.

Decisions and tradeoffs:

No runtime/editor architecture patch landed because behavior gates passed and failures were stale test/benchmark contracts.
Static/product server is the default for perf benchmark ownership; dev-mode measurement remains opt-in via SLATE_PAGINATION_CHAR_BURST_DEV=1.
Huge-doc full smoke is regression evidence only; previous accepted full-run AR baseline remains the promotion-grade result.

Implementation notes:

Edited /Users/zbeyens/git/plate-2/.tmp/slate-v2/playwright/stress/generated-editing.test.ts.
Edited /Users/zbeyens/git/plate-2/.tmp/slate-v2/scripts/benchmarks/browser/react/pagination-virtualized-char-burst.mjs.
Edited /Users/zbeyens/git/plate-2/.tmp/slate-v2/scripts/benchmarks/browser/react/huge-document-overlays.tsx.

Review fixes:

N/A: user asked to stop autoreviews; focused gates caught and verified concrete fixes.

Error attempts:

Error / failed attempt	Count	Next different move	Resolution
Broad Playwright command accidentally included stress tests because `bun playwright test` duplicated `test`	1	Use `bun run playwright -- ...`	Kept useful failure evidence, then reran correctly scoped gate.
Pagination char-burst benchmark failed in dev mode	2	Compare direct/static proof and patch benchmark owner	Static/product default passed.
Huge-doc overlay smoke missing placeholder	1	Inspect segment picker and patch smoke warmup logic	Overlay smoke and composite huge-doc smoke passed.

Verification evidence:

node /Users/zbeyens/git/codex-autoresearch/plugins/codex-autoresearch/scripts/autoresearch.mjs state --cwd /Users/zbeyens/git/plate-2/.tmp/slate-v2 --compact: current huge-doc AR state accepted/current; source drift clean.
PLAYWRIGHT_RETRIES=0 PLAYWRIGHT_WORKERS=1 bun run playwright -- playwright/stress/generated-editing.test.ts --project=chromium -g "editable-voids editable-island-native-focus": 1 passed.
PLAYWRIGHT_RETRIES=0 PLAYWRIGHT_WORKERS=1 bun run playwright -- playwright/integration/examples/huge-document.test.ts playwright/integration/examples/pagination.test.ts playwright/integration/examples/query-controls.test.ts playwright/integration/examples/dom-coverage-boundaries.test.ts --project=chromium -g "<focused regression regex>": 45 passed.
bun run bench:react:pagination-virtualized-char-burst:local: pagination_virtualized_failed=0, pagination_virtualized_p95_typing_ms=12, pagination_virtualized_load_after_dom_ms=570.3, pagination_virtualized_dom_nodes=630.
HUGE_DOC_FULL_SMOKE=1 bun run bench:react:huge-document:full:local: react_huge_doc_full_failure_count=0, react_huge_doc_full_virtualized_type_to_paint_p95_ms=22.5, react_huge_doc_full_dom_nodes_p95=290.
bun check: passed; lint had one warning in /Users/zbeyens/git/plate-2/.tmp/slate-v2/site/examples/ts/pagination.tsx about a pre-existing hook deps warning, zero errors.

Final handoff contract:

PR line: N/A, no PR requested.
Issue / tracker line: N/A, no tracker requested.
Confidence line: high.
Flow table:
- Reproduced: stale editable-voids stress oracle, pagination benchmark dev-mode contract failure, huge-doc overlay smoke warmup failure.
- Verified: focused browser gates, perf benchmarks, huge-doc smoke, and bun check.
Browser check: Playwright/browser benchmark proof, no manual screenshot.
Outcome: no requested huge-document/virtualization/new-example runtime regression found; three test/benchmark contract bugs fixed.
Caveat: huge-doc smoke ratio is not promotion-grade; prior accepted full AR baseline remains the full-run metric.
Design:
- Chosen boundary: benchmark/test contracts, not runtime.
- Why not quick patch: changing runtime to satisfy stale benchmark assumptions would regress the current example contract.
- Why not broader change: behavior and perf gates did not justify architecture churn.
Verified: focused gates and bun check passed.
PR body verified: N/A, no PR.

Task-style PR body contract:

Preserve any existing  block. If a changeset is part of the diff and repo policy expects auto release, include that block.
Use the accepted kitcn PR #270 visual format. The body starts with an emoji issue/tracker/fix line, for example 🐛 Fixes #123 or 🐛 Fixes ➖ N/A, then an emoji confidence line like 🟢 95-100% confidence.
Use this exact table header: | Phase | 🧪 Tests | 🌐 Browser |.
Use Reproduced and Verified rows. Mark passing proof with 🟢, repro or failing proof with 🔴, and non-applicable cells with ➖ N/A.
Use bold emoji section headings: **✅ Outcome**, **⚠️ Caveat**, **🏗️ Design**, and **🧪 Verified**.
Never include a line that links to the current PR itself. The current PR URL belongs in the final response, not in its own description.
Do not replace this with a generic Summary / Verification PR body, an adaptive prose body from a git helper skill, plain ## Outcome sections, or an unrelated generated badge footer unless the caller or repo template explicitly asks for it.
Proof is gh pr view --json body output or a concise source-backed summary of that output.

Final handoff / sync:

PR: N/A.
Issue / tracker: N/A.
Browser proof: Playwright and benchmark commands above.
Caveats: no manual Browser screenshot; proof is automated browser output.

Timeline:

2026-06-02T16:37:02.851Z Task goal plan created.
2026-06-02T16:40Z AR state read; focused gates discovered.
2026-06-02T16:42Z Broad Chromium gate found stale editable-voids stress oracle.
2026-06-02T16:45Z Editable-voids stress oracle fixed and exact stress gate passed.
2026-06-02T16:47Z Correctly scoped 45-test Chromium regression gate passed.
2026-06-02T16:49Z Pagination benchmark contract fixed; static/product benchmark passed.
2026-06-02T16:51Z Huge-doc overlay smoke warmup fixed; huge-doc full smoke passed.
2026-06-02T16:52Z bun check passed.

Reboot status:

Question	Answer
Where am I?	Closeout
Where am I going?	Final response
What is the goal?	Perfect Slate v2 regression sweep for huge document, virtualization, and new examples
What have I learned?	Requested runtime surfaces are green; failures were stale test/benchmark contracts
What have I done?	Fixed stale stress oracle and two benchmark contracts, then verified gates

Open risks:

None blocking. The remaining lint warning in pagination hook deps is a warning, not this pass's regression.