chore: remove deprecated workflows:* skill aliases (#284)

* docs: capture codex skill prompt model

* fix: align codex workflow conversion

* chore: remove deprecated workflows:* skill aliases

The workflows:brainstorm, workflows:plan, workflows:work, workflows:review,
and workflows:compound aliases have been deprecated long enough. Remove them
and update skill counts (46 → 41) across plugin.json, marketplace.json,
README, and CLAUDE.md.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Trevin Chow <trevin@trevinchow.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/utils/codex-content.ts

@@ -0,0 +1,75 @@
+export type CodexInvocationTargets = {
+  promptTargets: Record<string, string>
+  skillTargets: Record<string, string>
+}
+
+/**
+ * Transform Claude Code content to Codex-compatible content.
+ *
+ * Handles multiple syntax differences:
+ * 1. Task agent calls: Task agent-name(args) -> Use the $agent-name skill to: args
+ * 2. Slash command references:
+ *    - known prompt entrypoints -> /prompts:prompt-name
+ *    - known skills -> the exact skill name
+ *    - unknown slash refs -> /prompts:command-name
+ * 3. Agent references: @agent-name -> $agent-name skill
+ * 4. Claude config paths: .claude/ -> .codex/
+ */
+export function transformContentForCodex(
+  body: string,
+  targets?: CodexInvocationTargets,
+): string {
+  let result = body
+  const promptTargets = targets?.promptTargets ?? {}
+  const skillTargets = targets?.skillTargets ?? {}
+
+  const taskPattern = /^(\s*-?\s*)Task\s+([a-z][a-z0-9:-]*)\(([^)]+)\)/gm
+  result = result.replace(taskPattern, (_match, prefix: string, agentName: string, args: string) => {
+    // For namespaced calls like "compound-engineering:research:repo-research-analyst",
+    // use only the final segment as the skill name.
+    const finalSegment = agentName.includes(":") ? agentName.split(":").pop()! : agentName
+    const skillName = normalizeCodexName(finalSegment)
+    const trimmedArgs = args.trim()
+    return `${prefix}Use the $${skillName} skill to: ${trimmedArgs}`
+  })
+
+  const slashCommandPattern = /(?<![:\w])\/([a-z][a-z0-9_:-]*?)(?=[\s,."')\]}`]|$)/gi
+  result = result.replace(slashCommandPattern, (match, commandName: string) => {
+    if (commandName.includes("/")) return match
+    if (["dev", "tmp", "etc", "usr", "var", "bin", "home"].includes(commandName)) return match
+
+    const normalizedName = normalizeCodexName(commandName)
+    if (promptTargets[normalizedName]) {
+      return `/prompts:${promptTargets[normalizedName]}`
+    }
+    if (skillTargets[normalizedName]) {
+      return `the ${skillTargets[normalizedName]} skill`
+    }
+    return `/prompts:${normalizedName}`
+  })
+
+  result = result
+    .replace(/~\/\.claude\//g, "~/.codex/")
+    .replace(/\.claude\//g, ".codex/")
+
+  const agentRefPattern = /@([a-z][a-z0-9-]*-(?:agent|reviewer|researcher|analyst|specialist|oracle|sentinel|guardian|strategist))/gi
+  result = result.replace(agentRefPattern, (_match, agentName: string) => {
+    const skillName = normalizeCodexName(agentName)
+    return `$${skillName} skill`
+  })
+
+  return result
+}
+
+export function normalizeCodexName(value: string): string {
+  const trimmed = value.trim()
+  if (!trimmed) return "item"
+  const normalized = trimmed
+    .toLowerCase()
+    .replace(/[\\/]+/g, "-")
+    .replace(/[:\s]+/g, "-")
+    .replace(/[^a-z0-9_-]+/g, "-")
+    .replace(/-+/g, "-")
+    .replace(/^-+|-+$/g, "")
+  return normalized || "item"
+}