Summary

Closes #88. You could buy a workflow but not publish one — the on-chain program and the chain-layer publishWorkflow()/publishItemIx already supported it, but no UI surface exposed a kind toggle or a required-skills picker, and publishWorkflow() had no frontmatter-synthesis fallback (unlike publishSkill()), so a clean form couldn't publish a workflow without hand-typed YAML.

• Contract: publishSkill message gains optional kind?: "skill" | "workflow" + requiredSkills?: string[] (marketMessages.ts, protocol.ts).
• Backend: env.ts prefers explicit kind/requiredSkills over the existing frontmatter-sniffing fallback (kept for back-compat). workflow.ts's publishWorkflow() now synthesizes frontmatter from separate fields, mirroring publishSkill()'s existing synthesis.
• Webview (serves VSCode + mobile — mobile's Android WebView loads this same build via surfaces/android/scripts/build-assets.sh): PublishForm.tsx gets a skill/workflow toggle (violet/amber, matching the existing progress-gauge theme) and a required-skills checkbox picker reusing the RegisterWorkRepo pattern.
• CLI: SkillMarket.tsx publish stage gets a kind toggle field and a comma-separated required-skills field resolved against owned skill mints via ownedSkillMints().
• MCP tool: publish_skill now routes to publishWorkflow when requiredSkills is non-empty (no separate kind param needed — structured args make it implicit). Not in issue Workflow publishing: program supports it, but no contract/backend/UI path (missing on mobile + VSCode + CLI) #88's stated scope table, included per explicit follow-up decision in this work.

Dependencies / refs for the merger

• Base branch is cli-market-parity-93 (CLI: port webview marketplace features for full parity #94, open), not main. This PR is stacked on it — the CLI changes here assume that branch's refactored surfaces/cli/src/views/market/* structure. Merge CLI: port webview marketplace features for full parity #94 first, then this PR. If CLI: port webview marketplace features for full parity #94 is rebased/changed before merging, this branch will need a rebase too.
• Overlaps with Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56 (mobile-skill-market-parity, open) on several files: marketMessages.ts, protocol.ts, skill-market/index.ts, env.ts/env.spec.ts, SkillMarket.tsx, localhost/index.ts. No logical conflict found — Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56 adds a MarketItemType/plugin-card concept and doesn't touch the publishSkill variant itself — but expect textual merge conflicts from file proximity. Whichever of this PR / Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56 lands second should rebase.
  • Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56's "Workflow Selling" section (frontmatter-sniffing → publishWorkflow) already exists independently on current main (landed via an earlier commit, not through Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56) — that part of Mobile Skill Market Parity, Workflow Selling, and Plugin NFT Plumbing #56 is effectively redundant against latest main, unrelated to this PR.
• Publish workflows from the skill form #61 (fix/workflow-selling-publish) is CLOSED — an earlier, now-superseded attempt at the same env.ts routing. No action needed, just context if it comes up.
• feat/marketplace-message-contract (refactor(chat): single marketplace message contract shared by all surfaces #26), feat/vscode-markets-view (feat(vscode): Markets button + full-screen marketplace view #27), feat/rpc-onboarding (feat(rpc): friendly RPC config — registered Helius key beats the default (issue #23) #28), feat/publish-skill-mcp-tool (feat(skill-market): publish_skill MCP tool — the agent's publish door (#33 §B mechanism) #44), feat/wallet-signtransaction (feat: extend Wallet with on-chain signing (unblocks Track 2) #2) are all already merged (squash-merged, so git log --oneline main..<branch> misleadingly shows "unmerged" commits — content is already in main). Not a dependency, just avoid re-doing that work.

Test plan

• pnpm vitest run in packages/core: 225/226 passing (1 pre-existing failure in search_skills returns empty when there are no results, confirmed present on cli-market-parity-93 tip before this branch's changes — unrelated to this PR).
• Added tests: workflow.spec.ts (plain-body frontmatter synthesis + rejects missing requiredSkills), env.spec.ts (explicit kind/requiredSkills takes precedence over frontmatter-sniffing, both directions), skill-market/index.spec.ts (MCP tool routes to publishWorkflow vs publishSkill).
• tsc --noEmit clean in packages/core, surfaces/cli, surfaces/webview (pre-existing unrelated unused-var warnings only).
• Manual devnet smoke test (webview + CLI + MCP tool publish a workflow, gate verified on buy) — not yet run, no devnet script exists in-repo to automate it.

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