feat(cli)!: retire os create example; the refusal names os init (#16483)

The `example` template emitted a subset of what `os init` writes plus one
README, the only template-level duplication #15531 found between the two
scaffolder families. Removed under the #15531 ruling (batch #66, option B)
with no alias and no deprecation window.

The template is not merely deleted: `os create example` still answers, exits
1 and names `os init`, rather than falling through to `Unknown type:` and
printing only the surviving roster.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YFY46JydE1gMxQG1TqBcMZ

Author: os-sales

.changeset/os-create-example-retired.md

@@ -0,0 +1,51 @@
+---
+"@objectstack/cli": minor
+---
+
+feat(cli)!: retire `os create example` — it was a weaker `os init` plus a README, and the refusal now names `os init` (#16483, #15531)
+
+**BREAKING** — a published CLI surface is removed. `os create example <name>` is a
+command a user can run today and cannot run after this release. Graded `minor`
+rather than `major` under this repo's lockstep launch-window convention (no
+package here has ever shipped a `major` changeset); the break is stated here
+instead of in the number.
+
+<!-- adr-0087: not-required (no-migration-prescription) the retired surface is a CLI subcommand, not authored metadata: no Zod schema, no `packages/spec` declaration, no authorable key and no stored `sys_metadata` shape changes, so `objectstack migrate meta` has nothing to rewrite and the ledger has no step to carry. The channel that reaches every affected caller is the command itself, which now exits non-zero naming `os init`. -->
+
+**No alias and no deprecation window.** `os create example` will not come back,
+so change the command rather than pinning an older CLI.
+
+#15531 rendered the real emission of both scaffolder families and hashed it file
+by file. The only template-level duplication left between them was this one
+template: `os create example` wrote a **subset** of what `os init` writes, plus
+one README. The two families' emission policy is already unified through four
+shared exports, so the remaining duplicate was the template itself — and the
+ruling (decision batch #66, option B) is that it goes, not that the two command
+families merge. They emit two different artifacts: a kernel code `Plugin` is not
+a declarative app, and collapsing them would make that collision structural.
+
+**What to run instead**
+
+```bash
+os init <name>             # a full application project
+os init <name> -t empty    # objectstack.config.ts only
+```
+
+`os init` writes the same `objectstack.config.ts` and `tsconfig.json` the retired
+template did, and adds `src/objects`, a `.gitignore` and the dependency install
+it never had.
+
+**`os create plugin` is unaffected.** It scaffolds the kernel code `Plugin`
+contract — `src/index.ts` exporting a `Plugin` with `init` / `destroy`, built by
+`tsc`, publishable as `@objectstack/plugin-<name>` — which `os init` does not
+emit. `os create`'s flags, its `--in-repo` placement and its standalone
+emission policy are unchanged.
+
+**The removal is a signpost, not a deletion.** `os create example` still answers:
+it exits **1** and names `os init`, rather than falling through to the generic
+`Unknown type:` roster. A reader arriving from an older tutorial or a CI script
+that still calls it learns what replaced it instead of learning only that their
+spelling is off the list. Pinned end-to-end by driving the real CLI in
+`packages/cli/test/create-example-retired.e2e.test.ts`, which asserts both halves
+— the non-zero exit **and** the message naming `os init` — and holds the four
+public doc pages to the same promise.

content/docs/deployment/cli.mdx

@@ -1241,7 +1241,7 @@ only.
 | Command | Alias | Description |
 |---------|-------|-------------|
 | `os generate <type> <name>` | `os g` | Generate metadata files |
-| `os create <type> [name]` | | Scaffold a standalone plugin or example project |
+| `os create <type> [name]` | | Scaffold a standalone **kernel code** plugin project |
 
 #### `os generate` (alias: `os g`)
 
@@ -1314,19 +1314,31 @@ third-party extension primitive, authored as `src/skills/<name>.skill.ts` with
 
 #### `os create`
 
-Scaffolds a **standalone** project — a **kernel code** plugin (the `Plugin` contract,
+Scaffolds a **standalone** **kernel code** plugin project (the `Plugin` contract,
 built by `tsc`, publishable; *not* the metadata plugin `os init -t plugin` emits — see
-[Which scaffolder?](#os-init)), or an example application — into the current directory:
+[Which scaffolder?](#os-init)) into the current directory:
 
 ```bash
 os create plugin analytics    # Create ./plugin-analytics
-os create example my-app      # Create ./my-app
 
 cd plugin-analytics
 pnpm install
 pnpm build
 ```
 
+<Callout type="warn" title="`os create example` is retired">
+Use [`os init`](#os-init) to scaffold an application. `os create example` emitted a
+subset of what `os init` writes plus one README, so it was withdrawn in
+[#16483](https://github.com/objectstack-ai/objectstack/issues/16483) rather than kept as
+a second, weaker way to do the same thing — with **no alias and no deprecation window**.
+Running it now exits non-zero and names `os init`.
+
+```bash
+os init my-app             # a full application project
+os init my-app -t empty    # objectstack.config.ts only
+```
+</Callout>
+
 The emitted `package.json` declares its `@objectstack/*` dependencies as
 published semver ranges pinned to the version of the CLI that generated it, and
 the emitted `tsconfig.json` is self-contained, so the project installs and
@@ -1335,9 +1347,8 @@ builds anywhere — a workspace around it is neither needed nor assumed.
 **Options:**
 - `-d, --dir <directory>` — Write the project here instead of `./<name>`
 - `--in-repo` — Scaffold **inside an ObjectStack monorepo checkout** instead
-  (`packages/plugins/<name>` for a plugin, `examples/<name>` for an example),
-  with `workspace:*` dependencies and a `tsconfig.json` that extends the
-  repository root config. For ObjectStack platform work only: the project it
+  (`packages/plugins/plugin-<name>`), with `workspace:*` dependencies and a
+  `tsconfig.json` that extends the repository root config. For ObjectStack platform work only: the project it
   writes installs nowhere else, and the command refuses the flag when the
   current directory is not a pnpm workspace root.