slate v2 emotion shadcn hard cut

Objective: Hard cut Emotion from /Users/zbeyens/git/plate-2/.tmp/slate-v2 and migrate the example/site styling surface to the existing shadcn default-style stack. Completion requires no live @emotion/emotion/css(/cx( references outside ignored generated build output, no @emotion/css dependency in the manifest or lockfile, affected examples using stable class names and the site stylesheet, green focused and full local verification, and this plan passing the autogoal completion checker.

Flow mode: one-shot execution

Goal plan: docs/plans/2026-05-27-slate-v2-emotion-shadcn-hard-cut.md

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

Applied packs:

• browser
• package-api

Task source:

• type: user prompt
• id / link: N/A: direct chat request
• title: .tmp/slate-v2 Emotion hard cut to shadcn default style
• acceptance criteria: remove Emotion dependency/usages, migrate examples to className/CSS/shadcn-style primitives, verify site and browser behavior.

Completion threshold:

• rg -n '@emotion|emotion|css\(|cx\(' . --glob '!site/.next/**' --glob '!site/out/**' has zero matches from /Users/zbeyens/git/plate-2/.tmp/slate-v2.
• package.json and bun.lock no longer contain @emotion/css.
• Affected example files no longer import or call Emotion and use stable class names backed by site/public/index.css.
• bun check passes from /Users/zbeyens/git/plate-2/.tmp/slate-v2.
• Browser proof exercises representative migrated routes with zero console errors and zero generated Emotion-style css-* classes.

Verification surface:

• command: bun install
• command: bun lint:fix
• command: bun lint
• command: bun typecheck:site
• command: bun typecheck:root
• command: bun check
• source-audit: rg -n '@emotion|emotion|css\(|cx\(' . --glob '!site/.next/**' --glob '!site/out/**'
• browser: local Chromium smoke against http://localhost:3100/examples/*
• artifact: /tmp/slate-v2-shadcn-search.png

Constraints:

• Preserve Slate package runtime behavior.
• Do not add compatibility shims, fallback styling helpers, or new styling libraries.
• Do not create commits, pushes, or PRs.
• Do not revert unrelated dirty work in .tmp/slate-v2.

Boundaries:

• Source of truth: direct user prompt plus live .tmp/slate-v2 source.
• Allowed edit scope: .tmp/slate-v2/site/**, .tmp/slate-v2/package.json, .tmp/slate-v2/bun.lock, and adjacent root-check fixes required to keep verification honest.
• Browser surface: .tmp/slate-v2/site examples app.
• Tracker sync: N/A: no tracker issue supplied.
• Non-goals: no package runtime redesign and no PR work.

Blocked condition: Stop if local commands cannot run after repo-prescribed retry, browser tooling cannot access the site and no local browser proof is possible, or source proves a design decision is required that the local shadcn/default-style patterns cannot answer.

Start Gates:

Gate	Applies	Evidence
Skill analysis before edits	yes	Used autogoal, hard-cut, task, Browser skill, and attempted autoreview closeout
Active goal checked or created	yes	get_goal returned no goal; create_goal created this objective
Source of truth read before edits	yes	User prompt, .tmp/slate-v2/package.json, shadcn wiring, and Emotion audit read
Tracker comments and attachments read	N/A	No tracker item supplied
Video transcript evidence required	N/A	No video supplied
docs/solutions checked	yes	Searched docs/solutions for slate-v2/example/shadcn/emotion context
TDD decision	N/A	Styling-library migration; no new behavior contract needed before edit
Branch decision	N/A	No PR/commit requested; no proactive branch hygiene performed
Release artifact decision	yes	Private root/site example dependency cleanup; no published package changeset
Browser tool decision	yes	Tried approved in-app Browser first; it blocked local URL with ERR_BLOCKED_BY_CLIENT; used local Chromium smoke as fallback proof
PR expectation decision	N/A	User requested implementation only
Tracker sync expectation decision	N/A	No tracker issue supplied
Package/API pack selected	yes	Root manifest and lockfile changed
Public surface or package boundary identified	yes	Private root dependency graph and site examples only
Barrel/export impact decision	N/A	No package exports or barrels changed

Work Checklist:

• Objective includes outcome, completion threshold, verification surface, constraints, boundaries, and blocked condition.
• Task source classified with source type, title, acceptance criteria, caveats, likely files, browser surface, and root-cause layer.
• Nearby repo instructions and implementation patterns read before edits.
• Implementation fixes the ownership boundary by removing the dependency, imports, runtime class generation, and lockfile entries.
• Release artifact requirement recorded as N/A because no published package user-visible delta is part of this patch.
• Branch handling recorded as N/A because no commit or PR was requested.
• Workspace authority recorded: proof commands ran in .tmp/slate-v2.
• Browser route, interaction path, and visible outcome recorded.
• Browser proof uses approved Browser first and records fallback after client-side local URL blocking.
• Browser console and dynamic search-highlight behavior checked.
• Package boundary, release artifact, and hard-cut decision recorded.
• Package-owned checks recorded through bun check.
• Review/autoreview outcome recorded: helper hung and was killed; manual patch review found and fixed stylesheet nesting risk.
• Agent-native review decision recorded as N/A: no .agents, .claude, .codex, hook, prompt, or command source changed.
• Local-env-rot retry policy recorded as N/A: failures were source or stale generated-output issues, not install corruption.

Completion Gates:

Gate	Applies	Required action	Evidence
Named verification threshold	yes	Run source audit, dependency refresh, checks, and browser proof	All threshold rows below passed
Bug reproduced before fix	N/A	Record reason	Migration, not a bug repro
Targeted behavior verification	yes	Browser-smoke representative migrated routes	Pagination, markdown-preview, search-highlighting, and comment-mode mounted expected migrated selectors; search produced 3 highlights
TypeScript or typed config changed	yes	Run relevant typecheck	bun typecheck:site, bun typecheck:root, and full bun check passed
Package manifests, lockfile, or install graph changed	yes	Run install and checks	bun install removed one package; bun check passed
Workspace authority proof	yes	Run proof in owning checkout	All commands ran from /Users/zbeyens/git/plate-2/.tmp/slate-v2
Browser surface changed	yes	Exercise route/interaction	Local Chromium smoke passed; Browser-client blocked local URLs with ERR_BLOCKED_BY_CLIENT
Browser console/network check	yes	Record console state	Final browser smoke reported errors: []
Browser final proof artifact	yes	Record screenshot path	/tmp/slate-v2-shadcn-search.png
Package behavior or public API changed	N/A	Add changeset or reason	No published package behavior/API/types/config/runtime delta
Registry-only component work changed	N/A	Update registry changelog or reason	No registry work
Docs or content changed	N/A	Verify or reason	No intentional docs/content edit for this task
High-risk mini gate	yes	Record failure mode and proof plan	Risk: styling drift from moving runtime styles to stylesheet; proof: source audit, typecheck, lint, browser smoke, and screenshot
Agent-native review	N/A	Record reason	No agent/tooling files changed
Local install corruption suspected	N/A	Record reason	No install-corruption signature
Autoreview	N/A	Record blocker/alternate review	Helper ran >3 minutes with no output; killed PID 69249; manual review found and fixed native CSS nesting risk
PR create or update	N/A	Record reason	No PR requested
Final lint	yes	Run bun lint:fix and bun lint	Both passed after cleanup
Public API / package boundary proof	yes	Source-audit impact	Root private dependency only; no package exports/barrels changed
Release artifact classification	yes	Record classification	No artifact: private root/site example cleanup
Package typecheck/build/test	yes	Run owning checks	bun check passed
Barrel/export generation	N/A	Record reason	No package exports or exported file layout changed
Goal plan complete	yes	Run autogoal checker	To run after final plan update

Phase / pass table:

Phase	Status	Evidence	Next
Intake and source read	complete	Skills, package manifest, shadcn wiring, and Emotion audit read	Done
Implementation	complete	Emotion imports removed; class names and stylesheet rules added; dependency removed	Done
Verification	complete	Source audit, bun check, and browser smoke passed	Done
Review	complete	Autoreview helper blocked; manual review cleanup applied and reverified	Done
Closeout	complete	Final goal-plan checker remains as mechanical closeout	Done

Findings:

• Initial audit found shadcn already wired through site/components.json, site/styles/shadcn.css, site/components/ui/button.tsx, and site/pages/_app.tsx.
• Initial audit found @emotion/css imports across examples under site/examples/ts/** plus root package.json and bun.lock.
• Root check exposed unrelated async integration script type/lint gaps. Fixed the declaration file as .d.mts and removed one dead unused helper so bun check could prove the checkout.
• Browser-client in-app navigation to local URLs was blocked by the client with net::ERR_BLOCKED_BY_CLIENT; local Chromium proof against the same running app succeeded.

Timeline:

• 2026-05-27T07:44Z Created active goal and goal plan.
• 2026-05-27T07:44Z Read prompt, skills, package manifest, shadcn wiring, and Emotion audit.
• 2026-05-27T07:45Z Converted static style constants to stylesheet classes.
• 2026-05-27T07:48Z Replaced remaining dynamic Emotion calls with class toggles.
• 2026-05-27T07:49Z Ran bun install; lockfile removed @emotion/css.
• 2026-05-27T07:50Z bun typecheck:site passed.
• 2026-05-27T07:51Z bun lint:fix initially exposed CSS selector ordering; fixed and reran successfully.
• 2026-05-27T07:53Z Browser-client local URL proof blocked with ERR_BLOCKED_BY_CLIENT; local Chromium smoke succeeded.
• 2026-05-27T07:56Z bun check passed after root declaration/lint cleanup.
• 2026-05-27T07:57Z Autoreview helper hung and was terminated.
• 2026-05-27T08:03Z Manual review cleanup flattened stylesheet selectors.
• 2026-05-27T08:04Z Final bun check and browser smoke passed.

Decisions and tradeoffs:

• Hard cut means no local Emotion compatibility helper, no wrapper around Emotion semantics, and no new styling runtime.
• Kept example-specific styles in the already-loaded site stylesheet rather than scattering a new styling abstraction through examples.
• Used local Chromium smoke only after the approved in-app Browser path blocked local dev URLs.
• Fixed root async integration declaration/lint gaps because they blocked the repo's fast verification gate and were narrow source fixes.

Review fixes:

• Flattened generated nested CSS selectors and media rules after manual review to avoid relying on native CSS nesting support.
• Added scripts/integration-local-async.d.mts and removed the unused pickupPath helper so root typecheck/lint could pass.

Error attempts:

Error / failed attempt	Count	Next different move	Resolution
bun serve on 3100 failed with EADDRINUSE	1	Use already-running checkout server on 3100	Browser smoke used http://localhost:3100
Browser-client local URL blocked with ERR_BLOCKED_BY_CLIENT	2	Use local Chromium smoke against same server	Smoke passed with zero console errors
First declaration filename .mjs.d.ts not resolved by TS	1	Use ESM declaration filename .d.mts	bun typecheck:root passed
Autoreview helper produced no output for >3 minutes	1	Terminate helper and do manual source review	Manual review cleanup applied and reverified

Verification evidence:

• command: bun install from .tmp/slate-v2 -> pass, saved lockfile, one package removed.
• command: rg -n '@emotion|emotion|css\(|cx\(' . --glob '!site/.next/**' --glob '!site/out/**' from .tmp/slate-v2 -> zero matches.
• command: rg -n '"@emotion/css"|@emotion|emotion' package.json bun.lock site/examples/ts site/public/index.css scripts --glob '!site/.next/**' --glob '!site/out/**' from .tmp/slate-v2 -> zero matches.
• command: bun typecheck:site from .tmp/slate-v2 -> pass.
• command: bun typecheck:root from .tmp/slate-v2 -> pass.
• command: bun lint:fix from .tmp/slate-v2 -> pass.
• command: bun lint from .tmp/slate-v2 -> pass.
• command: bun check from .tmp/slate-v2 -> pass: lint, package/site/root typecheck, 1258 Bun tests, 35 slate-layout tests, and 457 slate-react Vitest tests.
• browser: local Chromium smoke from .tmp/slate-v2 against http://localhost:3100 -> pass: pagination, markdown-preview, search-highlighting, and comment-mode selectors present; css-* class count 0 on every checked route; search interaction produced 3 highlights; console errors [].
• artifact: screenshot saved at /tmp/slate-v2-shadcn-search.png.

Final handoff contract:

• PR line: N/A, no PR requested.
• Issue / tracker line: N/A, no tracker issue supplied.
• Confidence line: high; source audit, dependency audit, full fast gate, and browser smoke are green.
• Flow table:
  • Reproduced: N/A, migration request rather than bug repro.
  • Verified: source audit, bun check, and browser smoke passed.
• Browser check: approved Browser-client blocked local URL; local Chromium smoke passed against the running checkout server.
• Outcome: Emotion hard cut completed.
• Caveat: autoreview helper hung; manual review was used instead.
• Design:
  • Chosen boundary: site examples plus private root dependency graph.
  • Why not quick patch: leaving a compatibility helper would keep the dead styling runtime alive.
  • Why not broader change: package runtime/API was not part of the styling dependency cut.
• Verified: see Verification evidence.

Reboot status:

Question	Answer
Where am I?	Closeout complete
Where am I going?	Final response after checker and goal completion
What is the goal?	Hard cut Emotion from .tmp/slate-v2 and migrate site examples to shadcn/default-style CSS
What have I learned?	Emotion was limited to example styling plus root dependency graph; shadcn was already wired
What have I done?	Removed dependency/imports/runtime classes, moved styles to stylesheet, fixed fast-check blockers, verified with source audit, bun check, and browser smoke

Open risks:

• Autoreview helper did not complete; mitigated by manual source review and rerunning deterministic checks.