docs(agents): add AGENTS.md, skills index, and Cursor rules pointer

.cursor/rules/README.md

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+# Cursor (optional)
+
+**Cursor** users: start at **[AGENTS.md](../../AGENTS.md)**. All conventions live in **`skills/*/SKILL.md`**.
+
+This folder only points contributors to **`AGENTS.md`** so editor-specific config does not duplicate the canonical docs.

AGENTS.md

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+# Contentstack Kickstart: Nuxt – Agent guide
+
+**Universal entry point** for contributors and AI agents. Detailed conventions live in **`skills/*/SKILL.md`**.
+
+## What this repo is
+
+| Field | Detail |
+| --- | --- |
+| **Name:** | https://github.com/contentstack/kickstart-nuxt |
+| **Purpose:** | Minimal Nuxt application that connects to Contentstack: Delivery SDK setup, live preview, and visual builder–friendly bindings. |
+| **Out of scope (if any):** | Not a published npm SDK; no standalone HTTP API beyond the Nuxt app. |
+
+## Tech stack (at a glance)
+
+| Area | Details |
+| --- | --- |
+| Language | TypeScript (Vue SFCs with `lang="ts"`), Node.js for tooling |
+| Build | npm; Nuxt 4 (`nuxt`); key files `nuxt.config.ts`, `package.json`, `tsconfig.json` |
+| Tests | No automated test runner or test directories in this repo |
+| Lint / coverage | Not configured in `package.json` |
+| Runtime / CMS | Nuxt 4, Vue 3, Tailwind (`@nuxtjs/tailwindcss`); Contentstack Delivery SDK and Live Preview utils |
+
+## Commands (quick reference)
+
+| Command Type | Command |
+| --- | --- |
+| Install | `npm install` (runs `nuxt prepare` via `postinstall`) |
+| Build | `npm run build` |
+| Dev | `npm run dev` |
+| Static generate | `npm run generate` |
+| Preview production build | `npm run preview` |
+
+**CI (security / automation):** `.github/workflows/policy-scan.yml`, `.github/workflows/sca-scan.yml`, `.github/workflows/issues-jira.yml` — there is no dedicated build/test workflow.
+
+## Where the documentation lives: skills
+
+| Skill | Path | What it covers |
+| --- | --- | --- |
+| Dev workflow | `skills/dev-workflow/SKILL.md` | npm scripts, CI workflows, local checks, contributor expectations |
+| Nuxt framework | `skills/framework/SKILL.md` | Nuxt config, modules, `app/` layout, TypeScript project setup |
+| Contentstack + Nuxt | `skills/contentstack-nuxt/SKILL.md` | Env vars, SDK plugin, composables, live preview, stack seeding |
+| Testing | `skills/testing/SKILL.md` | Manual verification; no automated suite in repo; secrets policy |
+| Code review | `skills/code-review/SKILL.md` | PR checklist for this kickstart |
+
+Quick links to those files: [skills/README.md](skills/README.md).
+
+## Using Cursor (optional)
+
+If you use **Cursor**, `.cursor/rules/README.md` only points to **`AGENTS.md`** — same docs as everyone else.