docs(task): define remote cache protocol

TASK_CACHE_PARITY.md

@@ -114,7 +114,7 @@ outside this tracker.
 ## Remote cache
 
 - [x] Extract a versioned cache-store interface from the local filesystem implementation
-- [ ] Define and document a versioned remote cache protocol
+- [x] Define and document a versioned remote cache protocol
 - [ ] Add a composite local and remote cache store
 - [ ] Stream artifact uploads and downloads
 - [ ] Add remote read-only, write-only, and read/write modes

docs/.vitepress/sidebar.ts

@@ -177,6 +177,7 @@ export const sidebar: SidebarItem[] = [
       { text: "File Tasks", link: "/tasks/file-tasks" },
       { text: "Task Arguments", link: "/tasks/task-arguments" },
       { text: "Task Configuration", link: "/tasks/task-configuration" },
+      { text: "Remote Cache Protocol", link: "/tasks/remote-cache-protocol" },
       { text: "Task Templates", link: "/tasks/templates" },
       { text: "Monorepo Tasks", link: "/tasks/monorepo" },
       { text: "Sandboxing", link: "/sandboxing" },

docs/public/llms.txt

@@ -101,6 +101,7 @@
 - [File Tasks](https://mise.jdx.dev/tasks/file-tasks.html): In addition to defining tasks through the configuration, they can also be defined as standalone script files in one of the following directories.
 - [Task Arguments](https://mise.jdx.dev/tasks/task-arguments.html): Task arguments allow you to pass parameters to tasks, making them more flexible and reusable. There are three ways to define task arguments in mise, but only two are recommended for current use.
 - [Task Configuration](https://mise.jdx.dev/tasks/task-configuration.html): This is an exhaustive list of all the configuration options available for tasks in mise.toml or as file tasks.
+- [Remote Cache Protocol](https://mise.jdx.dev/tasks/remote-cache-protocol.html): [!WARNING] Remote task caching is experimental and is not yet configurable. This document defines the first public protocol, version 1. There is no earlier remote-cache protocol to preserve.
 - [Task Templates](https://mise.jdx.dev/tasks/templates.html): Task templates allow you to define reusable task definitions that can be extended by multiple tasks. This is particularly useful in monorepos or projects with similar task patterns across different…
 - [Monorepo Tasks](https://mise.jdx.dev/tasks/monorepo.html): mise supports monorepo-style task organization with target path syntax. This feature allows you to manage tasks across multiple projects in a single repository, where each project can have its own…
 - [Sandboxing](https://mise.jdx.dev/sandboxing.html): Mise supports lightweight process sandboxing for mise exec and mise run, inspired by zerobox. Sandboxing restricts filesystem, network, and environment variable access with granular controls.