sync shadcn code command yarn tab

Objective: Apply the dashboard payload mdx/code-command-yarn-tab: pending -> synced by adding shadcn-equivalent yarn support to Plate command code blocks, verifying the app, updating docs/sync/shadcn/deltas.json, and regenerating the dashboard.

Flow mode: one-shot execution. The user explicitly accepted this dashboard row through $sync-shadcn apply.

Goal plan: docs/plans/2026-05-30-sync-shadcn-code-command-yarn-tab.md

Primary template: docs/plans/templates/sync-shadcn.md

Completion threshold: Complete when Plate command code blocks produce and render yarn alongside pnpm, npm, and bun; focused app verification passes; the dashboard row is marked synced; and pnpm sync-shadcn dashboard regenerates the dashboard.

Verification surface:

• Source audit: apps/www/src/lib/rehype-npm-command.ts, apps/www/src/components/code-block-command.tsx, apps/www/src/components/typography.tsx, apps/www/src/components/copy-button.tsx, apps/www/src/types/unist.ts, apps/www/src/hooks/use-config.ts, apps/www/src/components/codeblock.tsx, apps/www/src/components/block-viewer.tsx, and apps/www/src/app/(app)/_components/installation-code.tsx.
• Upstream reference: ../shadcn/apps/v4/components/code-block-command.tsx and ../shadcn/apps/v4/lib/highlight-code.ts.
• Commands: pnpm --filter www typecheck, pnpm lint:fix, pnpm sync-shadcn dashboard, node --check .agents/rules/sync-shadcn/scripts/build-dashboard.mjs, and JSON parse for deltas.json plus dashboard.json.

Constraints:

• Do not run build:registry.
• Do not advance lastSyncedCommit; this is one dashboard item, not full-range accounting.
• Do not mutate rows not listed in the copied dashboard payload.
• Keep Plate command prop names and copy analytics.
• Keep screenshots absent for this source-only row.

Boundaries:

• Edited Plate command block and copy-command sources only where yarn support is required.
• Edited docs/sync/shadcn/deltas.json only for mdx/code-command-yarn-tab.
• Regenerated docs/sync/shadcn/dashboard.html and docs/sync/shadcn/dashboard.json.
• Fixed two lint blockers surfaced by pnpm lint:fix: duplicate defaults and delete in the dashboard builder, plus a hot regex in command menu.

Output budget strategy: Used focused file reads and capped command output. No broad upstream patch files were written.

Blocked condition: Blocked only if www typecheck, lint, dashboard generation, JSON parse, or source audit failed after the focused repair.

Sync state:

• base commit: 4a4dc8eb0fc793d8e9225e780183ad605f15d2c2 from docs/sync/shadcn/status.json.
• planned commit: efdec3ca4523e5edd8a714f633002a7addc203a1 from docs/sync/shadcn/status.json.
• latest inspected upstream app commit: e2fa0101e3f0e28a5e360b93f41d1685911dd9ff.
• range kind: dashboard-row implementation.
• run directory: N/A; apply mode must not write new run artifacts.
• implementation status: done.
• baseline status: unchanged.

Current verdict:

• verdict: synced.
• confidence: high.
• recommended next owner: sync-shadcn dashboard.
• reason: yarn is implemented at generation, rendering, persistence, and copy surfaces.

Start Gates:

Gate	Applies	Evidence
autogoal loaded and active goal checked/created	yes	create_goal created active row-sync goal
sync-shadcn skill/rule read	yes	user supplied sync-shadcn skill; apply semantics followed
Output budget strategy recorded before broad upstream commands	yes	no broad upstream commands used
docs/sync/shadcn/status.json read	yes	baseline 4a4dc8e, planned efdec3c, partial sync count 7
docs/sync/shadcn/decisions.md read	yes	confirms Plate command/docs policy and no baseline advancement
Prior migration plans/solution notes checked	yes	memory and dashboard row evidence scoped this as shadcn docs parity work
../shadcn clone exists and was fetched/pulled intentionally	N/A	no fetch needed for accepted dashboard-row apply; local upstream files inspected
Base and target refs resolved to exact SHAs	N/A	row apply does not recompute range; status SHAs recorded above
Base ancestry or ref problem proven	N/A	not a range-planning run
Planning-only vs implementation mode decided	yes	implementation mode from $sync-shadcn apply pending -> synced
User-review boundary recorded	yes	user explicitly accepted the row

Work Checklist:

• Objective, threshold, verification surface, constraints, boundaries, and blocked condition are filled from the active goal.
• Upstream range recorded with exact base SHA, target SHA, commit dates, and target subject; N/A for recomputed range because this is dashboard-row apply mode.
• Run directory created under docs/sync/shadcn/runs/; N/A because apply mode must not write new run artifacts.
• Complete upstream inventories saved; N/A because this is not range planning.
• Focused diffs inspected on demand and summarized; no .patch files were written.
• Visual screenshots captured; N/A because the row is source-only command behavior.
• Every changed upstream apps/v4 row classified; N/A because existing dashboard row supplied the classification.
• Decision counts reconcile to upstream TSV; N/A for dashboard-row apply.
• Added, modified, and deleted groups summarized; N/A for dashboard-row apply.
• Recommended merge slice accepted by user through copied dashboard row.
• Settled exclusions and Plate forks preserved.
• No user question remained for this row.
• docs/sync/shadcn/status.json update semantics recorded: unchanged.
• Workspace authority recorded for each verification command or artifact.
• Output budget discipline followed.
• Final handoff shape filled before closeout.

Completion Gates:

Gate	Applies	Required action	Evidence
Named verification threshold	yes	Prove yarn generation/render/copy support and synced dashboard state	source audit, rg, typecheck, lint, dashboard generation
Upstream range artifacts exist	N/A	Apply mode must not create range artifacts	no run artifact needed
Inventory completeness	N/A	Existing dashboard row is the mutation unit	row mdx/code-command-yarn-tab updated only
Decision accounting	yes	Mark accepted row synced after implementation	deltas.json row state is synced
Status JSON parse and semantics	yes	Keep baseline unchanged	status read; no status write
Source-backed Plate mapping	yes	Record local source evidence	files listed above include __yarnCommand__ and yarn config
Visual comparison screenshots	N/A	Source-only MDX command row	no screenshots needed
Planning-only no implementation edits	N/A	Accepted implementation mode	user applied pending -> synced
Accepted implementation verification	yes	Run focused verification	pnpm --filter www typecheck, pnpm lint:fix
Browser surface changed	N/A	Source behavior only; no browser proof required by row	source and typecheck proof
Package manifests, lockfile, or install graph changed	N/A	No package files changed	no install needed
Agent rules or skills changed	N/A	No .mdc or generated skill edited	dashboard script only
CI-controlled generated output	yes	Avoid registry/template output	no build:registry; only dashboard regenerated
Baseline advancement	yes	Do not advance baseline	status.json unchanged
User review boundary	yes	Accepted dashboard row implemented	$sync-shadcn apply payload
Output budget discipline	yes	Keep evidence capped	no broad patch artifacts
Goal plan complete	yes	Run autogoal check	command recorded below

Phase / pass table:

Phase	Status	Evidence	Next
Intake and baseline read	done	status and decisions read	complete
Upstream row evidence	done	upstream CodeBlockCommand and highlight-code inspected	complete
Implementation	done	yarn props, tabs, config, copy helpers added	complete
Dashboard state	done	deltas.json row synced and dashboard regenerated	complete
Verification	done	typecheck, lint, dashboard, JSON parse, source audit	complete
Closeout	done	final handoff ready	complete

Decision counts:

Decision	Count	Notes
synced	1	mdx/code-command-yarn-tab
no-op	0	no extra rows touched

Recommended merge slices:

Order	Slice	Class	Files	Why	Verification
1	Add yarn support to command code blocks	synced	command transform, MDX pre, command UI, copy helpers	match upstream command-manager coverage	pnpm --filter www typecheck; pnpm lint:fix; dashboard regeneration

Questions:

• None.

Findings:

• Plate already had command tabs and copy helpers; they only lacked yarn at the prop-generation and UI surfaces.
• pnpm lint:fix exposed existing lint blockers in dashboard builder and command menu; fixed them so verification is green.

Decisions and tradeoffs:

• Used upstream package-manager coverage while preserving Plate prop names: __yarnCommand__ instead of upstream __yarn__.
• Kept the row as synced because behavior is equivalent even though Plate's local names differ.

Error attempts:

Error / failed attempt	Count	Next different move	Resolution
pnpm lint:fix failed on duplicate object keys, delete, and hot regex	1	Patch lint blockers directly	passed on rerun

Verification evidence:

• pnpm --filter www typecheck: passed.
• pnpm lint:fix: passed after focused lint repairs.
• pnpm sync-shadcn dashboard: passed and regenerated dashboard artifacts.
• node --check .agents/rules/sync-shadcn/scripts/build-dashboard.mjs: passed.
• JSON parse for docs/sync/shadcn/deltas.json and docs/sync/shadcn/dashboard.json: passed.
• rg source audit found __yarnCommand__ in transform, command UI, MDX pre, copy helpers, installation snippets, block viewer, type definitions, and dashboard JSON.

Reboot status: No reboot needed. The task finished in the current thread with source, dashboard, and verification evidence.

Open risks: None for the accepted row. This does not settle the other pending MDX rows.

Final handoff:

• Row: mdx/code-command-yarn-tab.
• State: synced.
• Baseline: unchanged.