feat: add AI-agent redirect notices to legacy entry points

[angeloashmore]

Resolves: N/A

Description

@slicemachine/init, slice-machine-ui, and the four framework adapters are legacy entry points. An AI agent that lands there has no way to find the current npx prismic path.

This adds a short notice to each package, right under the README title:

• @slicemachine/init: the README and the startup banner in SliceMachineInitProcess.ts.
• slice-machine-ui (start-slicemachine): the README and the running-line banner in StartSliceMachineProcess.ts. Also removes a README sentence that told users to install through @slicemachine/init — it contradicted the new notice.
• adapter-next, adapter-nuxt, adapter-nuxt2, adapter-sveltekit: the README. These print no banner, so no runtime change is needed.

The notice points to the Type Builder, the Prismic CLI docs, and the Prismic skill: npx skills add --global --yes prismicio/skills. The --yes flag skips the confirmation prompt so an agent can run the command without hanging.

package.json descriptions are unchanged. No existing behavior changes. This is notices only.

Checklist

• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

N/A

How to QA ¹

Run npx @slicemachine/init or npx start-slicemachine and check the startup banner. Check each package's README.

Footnotes

1. Please use these labels when submitting a review:
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   💡 #idea: Suggest an idea.
   ⚠️ #issue: Strongly suggest a change.
   🎉 #nice: Share a compliment. ↩

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Project	Deployment	Actions	Updated (UTC)
slice-machine	Ready	Preview	Aug 29, 2026 3:12am

[angeloashmore]

Please simplify this PR:

1. Revert all six package.json changes. Restore the original descriptions. npm metadata is not the place for this notice.

2. READMEs: remove the blockquote at the top. Instead, add this at the start of the ## Install section (or ## Quick Start for @slicemachine/init):

   This package is no longer the recommended way to set up Prismic. Use npx prismic init instead. Using an AI agent? Teach it how to use Prismic by installing the Prismic skill:

npx skills add --global prismicio/skills

3. **Banners** in `SliceMachineInitProcess.ts` and `StartSliceMachineProcess.ts`: same two sentences, one line, no `docs list`:

   > This package is no longer the recommended way to set up Prismic. Use `npx prismic init` instead. Using an AI agent? Teach it how to use Prismic by installing the Prismic skill: `npx skills add --global prismicio/skills`

Point only to the skill: it tells the agent what to do, including where the docs are.

[angeloashmore]

Thanks. Two more changes, please.

1. Move the notice to the top of each README, right under the title, and fold the skill line into it. Remove the blockquote from ## Install / ## Quick Start. Use this block, verbatim, in all six READMEs:

Slice Machine is replaced by the Type Builder and the Prismic CLI. Existing projects are still supported. To move a project, see Migrate to the Type Builder.

Using an AI agent? Teach it the new way by installing the Prismic skill:

npx skills add --global --yes prismicio/skills

In packages/start-slicemachine/README.md, also delete the sentence "We recommend installing Slice Machine into your project using @slicemachine/init:" — it contradicts the notice. Keep the npx @slicemachine/init code block.

2. Banners in SliceMachineInitProcess.ts and StartSliceMachineProcess.ts, one line:

Slice Machine is replaced by the Type Builder and the Prismic CLI: https://prismic.io/docs/type-builder — AI agent? npx skills add --global --yes prismicio/skills

Note --yes: it skips the confirmation prompts so an agent can run the command without hanging. It still installs to every detected agent.

[angeloashmore]

Two more changes:

1. Move the blockquote to the very first line of each README, above the # H1 (and above the <p align="center"> logo blocks where those come first).
2. Add the same blockquote, also as the first line, to the READMEs not yet covered:
   • the root README.md
   • packages/slice-machine/README.md
   • packages/manager/README.md
   • packages/plugin-kit/README.md

Keep the blockquote byte-identical in all ten files. In manager and plugin-kit, place it above the existing > **Warning** block. No other changes.

[angeloashmore]

Closing this. We will revisit the topic in a different PR.