Slate AR target finalize pagination

Objective: Target-back Slate AR perf wins, run finalize preview, and set up the next pagination loop with auditable plan/check evidence.

Goal plan: docs/plans/2026-06-01-slate-ar-target-finalize-pagination.md

Template: docs/plans/templates/task.md

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

Applied packs:

• agent-native (docs/plans/templates/packs/agent-native.md)
• package-api (docs/plans/templates/packs/package-api.md)

Task source:

• type: user request
• id / link: local chat request, 2026-06-01
• title: Target-back the three Slate AR metrics and prepare pagination AR next step
• acceptance criteria: the fanout, rich-text structural ops, and huge-doc virtualized type-to-paint metrics are first-class benchmark targets; target report/check artifacts are current; slate-ar-finalize preview is run; the next pagination AR target setup is inspected without starting unsafe review branches or a blind optimization loop.

Completion threshold:

• Done when benchmarks/targets/slate-v2.json has exact target contracts for react-runtime-node-fanout, core-rich-text-operations-compare, and react-huge-document-virtualized-type-to-paint; generated target history and report match; all four relevant targets dry-run through Autoresearch setup; pnpm slate:ar:finalize-preview has recorded the current finalization blocker; and pnpm slate:ar:setup-target -- react-pagination-virtualized-char-burst records the next safe pagination loop setup.
• Task closure is legal only when the verification evidence below is recorded and node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-01-slate-ar-target-finalize-pagination.md passes.

Verification surface:

• Source audit: benchmarks/targets/slate-v2.json.
• Generated artifacts: benchmarks/targets/history/slate-v2-latest.json and benchmarks/targets/reports/slate-v2.md.
• Commands: pnpm bench:targets:check, pnpm bench:targets:report:check, pnpm bench:targets:dry-run -- <target-id> for the three new/exact targets plus pagination, pnpm slate:ar:setup-target -- react-pagination-virtualized-char-burst, pnpm slate:ar:state, pnpm slate:ar:finalize-preview, and the autogoal completion check.

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: benchmarks/targets/slate-v2.json; generated report/history are derived from it.
• Allowed edit scope: benchmark target registry, generated target report/history, and this goal plan.
• Browser surface: none changed; browser commands are referenced as correctness contracts only.
• Tracker sync: N/A, no issue or PR was requested.
• Non-goals: no Slate runtime changes, no benchmark reruns, no AR branch creation, no commit, no push, no PR.

Output budget strategy:

• Reads were scoped to skill files, target registry, target scripts, and generated reports. Broad search output was capped with max_output_tokens; target reports were saved as generated artifacts instead of streamed fully.

Blocked condition:

• A live optimization or finalization branch is blocked without explicit user approval because slate-ar-finalize-preview reports dirty tree, omitted commit overlap, and final-tree coverage warnings. The safe autonomous scope is registry setup and read-only AR preview/setup evidence.

Task state:

• task_type: benchmark control-plane update
• task_complexity: normal
• current_phase: closeout
• current_phase_status: complete
• next_phase: final response
• goal_status: active

Current verdict:

• verdict: target-backed and verified
• confidence: high
• next owner: user for any mutating finalization or fresh pagination AR segment
• reason: registry/check/report/dry-run/finalize-preview/setup-target all have fresh evidence; finalize preview correctly refuses review-branch readiness.

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/2026-06-01-slate-ar-target-finalize-pagination.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	Loaded autogoal, slate-ar, slate-ar-finalize, and slate-ar-perf.
Active goal checked or created	yes	get_goal returned none; create_goal created the active objective.
Source of truth read before edits	yes	Read benchmarks/targets/slate-v2.json and tooling/scripts/bench-targets.mjs.
Tracker comments and attachments read	no	N/A: no tracker item or attachment in this request.
Video transcript evidence required	no	N/A: no video evidence is part of this control-plane task.
docs/solutions checked for non-trivial existing-code work	no	N/A: no runtime/code behavior changed.
TDD decision before behavior change or bug fix	no	N/A: target registry/report update only.
Branch decision for code-changing task	no	N/A: no branch/commit/PR requested.
Release artifact decision	yes	No release artifact: internal benchmark/AR control-plane only.
Browser tool decision for browser surface	no	N/A: no browser surface changed.
PR expectation decision	yes	No PR requested.
Tracker sync expectation decision	yes	No tracker sync requested.
Output budget strategy recorded	yes	Recorded above; commands/searches were scoped and capped.
Agent-native pack selected	yes	Selected because AR target commands are agent-facing workflow surfaces.
Agent-facing action surface identified	yes	bench:targets:* and slate:ar:* package scripts.
Source rule versus generated mirror boundary identified	yes	Source is benchmarks/targets/slate-v2.json; report/history are generated.
agent-native-reviewer loaded or waiver recorded	yes	Loaded; no UI action parity gap applies to CLI target registry work.
Package/API pack selected	yes	Selected conservatively because target registry describes package/workspace verification.
Public surface or package boundary identified	yes	No public package API or export boundary changed.
Release artifact path selected	yes	N/A: no published user-visible package delta.
changeset skill loaded when .changeset is required	no	N/A: no changeset required.
Barrel/export impact decision recorded	yes	N/A: no exports or file layout changed.

Work Checklist:

• Short objective plus outcome, completion threshold, verification surface, constraints, boundaries, and blocked condition are concrete.
• Task source classified with source type, id/link, title, task type, acceptance criteria, caveats, likely files/routes/packages, browser surface, and root-cause layer.
• Required video or screen-recording evidence is cached/read as normalized <video-transcripts> XML, or marked N/A with reason.
• Nearby repo instructions and implementation patterns read before edits.
• Implementation fixes the right ownership boundary, or the narrower choice is recorded with reason.
• Release artifact requirement recorded: changeset, registry changelog, or N/A with reason.
• Final handoff shape decided: bug/feature/testing/batch/review/tracker requirements, PR body sync, and issue/Linear sync when applicable.
• Branch handling recorded for code-changing work: dedicated branch used, new branch needed, or N/A with reason.
• Local-env-rot retry policy recorded for any surprising repo-wide failure: reinstall/rerun evidence or N/A with reason.
• Workspace authority recorded: every proof command names the cwd/tool that owns the changed behavior.
• High-risk note recorded for public API, runtime, package-boundary, browser behavior, agent-action, or command-contract changes, or marked N/A with reason.
• Review/autoreview target selected from actual diff state for non-trivial implementation work, or marked N/A with reason.
• Agent-native review decision recorded for .agents/**, .claude/**, .codex/**, skills, hooks, commands, prompts, or user-action tooling.
• Output budget discipline recorded and followed: broad searches are scoped, capped, counted, or artifacted instead of streamed into goal context.
• Agent-native pack: source-of-truth rule files are edited instead of generated skill mirrors.
• Agent-native pack: the changed agent action is discoverable from the skill/rule text.
• Agent-native pack: generated mirrors are synced when .agents/rules/** changed, or N/A reason is recorded.
• Agent-native pack: accepted agent-native review findings are fixed or explicitly rejected with reason.
• Package/API pack: public API, package boundary, export, and release-artifact impact are recorded.
• Package/API pack: release artifact matrix is applied: .changeset, registry changelog, or explicit no-artifact reason.
• Package/API pack: .changeset work loads changeset and follows its package/version/prose rules.
• Package/API pack: registry-only work updates docs/components/changelog.mdx instead of adding a package changeset.
• Package/API pack: no-artifact decisions state why the diff has no published package user-visible delta from main.
• Package/API pack: compatibility, migration, or hard-cut decision is explicit when public shape changes.
• Package/API pack: package-owned typecheck/build/test proof is recorded or marked N/A with reason.
• Package/API pack: generated barrels or release notes are updated when required.

Completion Gates:

Gate	Applies	Required action	Evidence
Named verification threshold	yes	Run the registry/report/setup/finalize commands named in this plan.	pnpm bench:targets:check, pnpm bench:targets:report:check, four target dry-runs, pnpm slate:ar:setup-target -- react-pagination-virtualized-char-burst, pnpm slate:ar:state, and pnpm slate:ar:finalize-preview completed.
Bug reproduced before fix	no	Record N/A with reason.	N/A: no product bug was fixed in this task.
Targeted behavior verification	yes	Verify target registry behavior.	pnpm bench:targets:list shows exact metrics for fanout, rich-text structural ops, huge-doc virtualized type-to-paint, and pagination char-burst.
TypeScript or typed config changed	no	Record N/A with reason.	N/A: no TypeScript or typed config changed.
Package exports or file layout changed	no	Record N/A with reason.	N/A: no exports or file layout changed.
Package manifests, lockfile, or install graph changed	no	Record N/A with reason.	N/A: no manifest, lockfile, or install graph changed.
Agent rules or skills changed	no	Record N/A with reason.	N/A: no .agents/rules/** or skill source changed.
Workspace authority proof	yes	Run verification in plate-2, the control-plane workspace.	All pnpm bench:targets:* and pnpm slate:ar:* commands ran from /Users/zbeyens/git/plate-2.
Browser surface changed	no	Record N/A with reason.	N/A: browser commands are only target correctness contracts.
Browser final proof	no	Record N/A with reason.	N/A: no browser UI changed.
CI-controlled template output changed	no	Record N/A with reason.	N/A: no templates/** touched.
Package behavior or public API changed	no	Record N/A with reason.	N/A: benchmark control-plane only.
Registry-only component work changed	no	Record N/A with reason.	N/A: no apps/www/src/registry/** component work.
Docs or content changed	yes	Verify source-backed claims.	This goal plan records command evidence; generated target report is derived from the JSON registry.
High-risk mini gate	yes	Record failure mode, proof plan, and boundary.	Failure mode is stale/unsafe AR finalization; pnpm slate:ar:finalize-preview reports dirty-tree/overlap/final-tree warnings and says to rework/collapse or use current-tree.
Agent-native review for agent/tooling changes	yes	Load reviewer or record waiver.	Loaded agent-native-reviewer; no action-parity issue applies because this is CLI target metadata, not user UI action.
Local install corruption suspected	no	Record N/A with reason.	N/A: no install-corruption failure shape appeared.
Autoreview for non-trivial implementation changes	no	Record waiver.	N/A: current checkout has large unrelated dirty runtime work; this task's change is mechanically verified target metadata, and reviewing the whole dirty tree would be misleading.
PR create or update	no	Record N/A with reason.	N/A: no PR requested.
Task-style PR body verified	no	Record N/A with reason.	N/A: no PR requested.
PR proof image hosting	no	Record N/A with reason.	N/A: no PR/browser proof image.
Tracker sync-back	no	Record N/A with reason.	N/A: no tracker item.
Final handoff contract	yes	Fill final handoff fields.	Final handoff fields below summarize outcome, caveat, design, and verification.
Final lint	no	Record N/A with reason.	N/A: JSON/report/plan update only; formatting validated by JSON parse and target checks.
Output budget discipline	yes	Verify no unbounded high-volume command output was streamed.	Search/read commands were scoped and capped; one broad rg was truncated by tool output but not needed for decisions.
Goal plan complete	yes	Run node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-01-slate-ar-target-finalize-pagination.md.	Run after this plan is filled.
Agent source / generated sync	no	Record N/A with reason.	N/A: no agent rule source changed.
Agent action discoverability	yes	Source-audit action surface.	package.json exposes bench:targets:*, slate:ar:setup-target, slate:ar:init-target, slate:ar:finalize-preview, and related shortcuts.
Agent-native review	yes	Load reviewer or record N/A.	Loaded reviewer; no UI/agent parity finding for target registry metadata.
Public API / package boundary proof	yes	Source-audit boundary.	No public package API/export changed; only benchmark control-plane JSON/report/plan.
Release artifact classification	yes	Record classification.	Internal benchmark/AR control-plane and generated evidence report only.
Published package changeset	no	Record N/A with reason.	N/A: no published package delta.
Registry changelog	no	Record N/A with reason.	N/A: not registry component work.
No release artifact	yes	Record exact reason.	Internal-only benchmark/AR target metadata; no user-visible package behavior/API/types/config/runtime delta.
Package typecheck/build/test	no	Record N/A with reason.	N/A: no package source changed.
Barrel/export generation	no	Record N/A with reason.	N/A: no exported files changed.

Phase / pass table:

Phase	Status	Evidence	Next
Intake and source read	complete	Skills, registry, target tooling, and existing AR state read.	implementation
Implementation	complete	Target registry patched; report/history regenerated.	verification
Verification	complete	Target check/report check/dry-runs/setup-target/state/finalize-preview completed.	closeout
PR / tracker sync	N/A	No PR or tracker sync requested.	final response
Closeout	complete	Plan filled; autogoal completion check runs last.	final response

Findings:

• react-runtime-node-fanout was missing from the target registry.
• core-rich-text-operations-compare still used generic benchmark_seconds instead of rich_text_structural_ops_p95_ms.
• Huge-doc virtualized type-to-paint needed its own target instead of mutating the generic browser-trace Evidence Kit import.
• slate-ar-finalize-preview is not ready for review branches because the AR history overlaps a dirty, broad tree.

Decisions and tradeoffs:

• Added a separate huge-doc virtualized target instead of rewriting the generic imported browser-trace target.
• Kept pagination as the next read-only setup target; did not start a new mutating AR packet or branch finalization without approval.

Implementation notes:

• Updated benchmarks/targets/slate-v2.json.
• Regenerated benchmarks/targets/history/slate-v2-latest.json and benchmarks/targets/reports/slate-v2.md.

Review fixes:

• None yet.

Error attempts:

Error / failed attempt	Count	Next different move	Resolution
None yet	0

Verification evidence:

• node -e "JSON.parse(...)": json ok.
• pnpm bench:targets:check: benchmark-targets ok: 26 targets.
• pnpm bench:targets:list | rg ...: the relevant target ids print exact metrics: slate_react_runtime_node_fanout_count, rich_text_structural_ops_p95_ms, react_huge_doc_type_to_paint_p95_ms, and pagination_virtualized_vs_table_ratio.
• pnpm bench:targets:report: regenerated target history and Markdown report.
• pnpm bench:targets:report:check: generated files match.
• pnpm bench:targets:dry-run -- react-runtime-node-fanout: setup OK.
• pnpm bench:targets:dry-run -- core-rich-text-operations-compare: setup OK.
• pnpm bench:targets:dry-run -- react-huge-document-virtualized-type-to-paint: setup OK.
• pnpm bench:targets:dry-run -- react-pagination-virtualized-char-burst: setup OK.
• pnpm slate:ar:setup-target -- react-pagination-virtualized-char-burst: setup-plan OK; next safe stage is session setup/new segment, with warnings about existing dirty/session artifacts.
• pnpm slate:ar:state: current pagination AR session has 3 runs, 2 kept, best development metric 2.43, and promotion still blocked by dev-only evidence/dirty drift.
• pnpm slate:ar:finalize-preview: preview OK but ready=false; warnings show excluded unkept commits, missing final-tree coverage, planned-file overlap, dirty tree, and overlapping kept runs.

Final handoff contract:

• PR line: N/A, no PR requested.
• Issue / tracker line: N/A, no tracker item.
• Confidence line: high for target setup; medium for promotion readiness because finalization preview correctly blocks.
• Flow table:
  • Reproduced: N/A, no product bug.
  • Verified: target registry/report/setup/finalize commands listed above.
• Browser check: N/A, no browser surface changed.
• Outcome: the three finished metrics are target-backed; pagination target setup is ready for a fresh safe loop; finalization preview says review branches are not safe from the current tree.
• Caveat: AR promotion remains dev-only until a promotion-grade pagination repeat/full integration sweep or accepted current-tree finalization path.
• Design:
  • Chosen boundary: benchmark target registry as control plane.
  • Why not quick patch: generic metric placeholders make AR optimize the wrong thing.
  • Why not broader change: no runtime/package API change was needed.
• Verified: see verification evidence.
• PR body verified: N/A, no PR.

Task-style PR body contract:

• Preserve any existing <!-- auto-release:start --> 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, no PR requested.
• Issue / tracker: N/A, no tracker item.
• Browser proof: N/A, no browser surface changed.
• Caveats: finalization preview is blocked by dirty tree/overlap; promotion evidence is still dev-only.

Timeline:

• 2026-06-01T15:41:09.342Z Task goal plan created.

Reboot status:

Question	Answer
Where am I?	Intake and source read
Where am I?	Closeout
Where am I going?	Final response after autogoal completion check
What is the goal?	Target-back three Slate AR metrics, preview finalization, and prepare the next pagination AR loop
What have I learned?	Finalization branches are not safe from the current dirty/overlapping AR tree
What have I done?	Patched target registry, regenerated reports, ran target checks/dry-runs, inspected pagination setup/state, and ran finalize preview

Open risks:

• No runtime risk from this task. Workflow risk remains: do not create AR review branches from the current preview; use a clean current-tree plan or a fresh promotion segment.