diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1fe7dcb..7d5b471 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,17 @@ Versions before 0.8.0 are in the [git tags](https://github.com/leemour/cli-core/
 Every entry says what changed as a caller sees it, why, and what to watch for — the rules are
 [`docs/dev/CONVENTIONS.md`](docs/dev/CONVENTIONS.md#the-changelog).
 
+## 0.15.0 — 01.10.2026
+
+### Added
+
+- **`annotate(command, { mutates: true, local: true })`** marks a write that changes only this
+  machine — a file, the keyring — and never the service. `CommandInfo.local` carries it, and
+  `mutates` stays true, so a caller that tells reads from writes still sees a write.
+- **`commandsPage` text takes `mutatesLocal`**, the line shown under such a command instead of
+  `mutates`. Without it a local write gets no line. Before this, `config set` was labelled as
+  changing Telegram or MAX.
+
 ## 0.14.0 — 01.10.2026
 
 ### Added
diff --git a/package.json b/package.json
index 43ffe8f..1ede394 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@leemour/cli-core",
-  "version": "0.14.0",
+  "version": "0.15.0",
   "description": "The parts every command line tool needs: output modes, terminal rendering, error model, exit codes, credentials, clocks",
   "license": "MIT",
   "author": "Viacheslav Ptsarev",
diff --git a/src/commands/commands.test.ts b/src/commands/commands.test.ts
index 24ad724..d4e0106 100644
--- a/src/commands/commands.test.ts
+++ b/src/commands/commands.test.ts
@@ -132,6 +132,18 @@ describe("hidden commands", () => {
   })
 })
 
+const COMMON_TEXT = {
+  banner: "",
+  title: "Commands",
+  intro: "",
+  globalHeading: "Global options",
+  globalIntro: "",
+  mutates: "",
+  exitHeading: "Exit codes",
+  exitIntro: "",
+  outro: "",
+}
+
 describe("commandsPage", () => {
   const page = () =>
     commandsPage({
@@ -166,6 +178,25 @@ describe("commandsPage", () => {
     expect(text.endsWith("| `1` | anything else |\n")).toBe(true)
   })
 
+  it("labels a write that changes only this machine with its own line, or none", () => {
+    const root = new Command("tool")
+    annotate(root.command("send").description("send"), { mutates: true })
+    annotate(root.command("save").description("save"), { mutates: true, local: true })
+    const text = (mutatesLocal?: string) =>
+      commandsPage({
+        cli: "tool",
+        commands: describeProgram(root),
+        options: [],
+        labels: COMMANDS_PAGE_LABELS.en,
+        text: { ...COMMON_TEXT, mutates: "**Changes the service.**", ...(mutatesLocal ? { mutatesLocal } : {}) },
+      })
+
+    expect(text("**Changes this machine only.**")).toContain("## `tool send`\n\nsend\n\n**Changes the service.**")
+    expect(text("**Changes this machine only.**")).toContain("## `tool save`\n\nsave\n\n**Changes this machine only.**")
+    expect(text()).toContain("## `tool save`\n\nsave\n\n```sh")
+    expect(describeProgram(root)[1]).toMatchObject({ mutates: true, local: true })
+  })
+
   it("keeps a pipe or a tilde from breaking its row, and lists the allowed values", () => {
     expect(page()).toContain("| `--sort <order>` | order. One of: `new`, `old`. |")
     const piped = commandsPage({
diff --git a/src/commands/index.ts b/src/commands/index.ts
index 463fb29..ee99c73 100644
--- a/src/commands/index.ts
+++ b/src/commands/index.ts
@@ -18,8 +18,10 @@ export interface CommandMeta {
   origin?: Origin
   /** The catalog operation a generated command was made from. */
   operationId?: string
-  /** True when running the command changes something outside this machine. */
+  /** True when running the command changes something: a write, wherever it lands. */
   mutates?: boolean
+  /** With `mutates`: what it changes is only on this machine — a file, the keyring — never the service. */
+  local?: boolean
   state?: CommandState
   examples?: readonly string[]
 }
@@ -62,6 +64,7 @@ export interface CommandInfo {
   origin: Origin
   operationId?: string
   mutates?: boolean
+  local?: boolean
   state?: CommandState
   examples?: readonly string[]
   arguments: readonly ArgumentInfo[]
diff --git a/src/commands/page.ts b/src/commands/page.ts
index d7b61e9..ec32203 100644
--- a/src/commands/page.ts
+++ b/src/commands/page.ts
@@ -61,6 +61,8 @@ export type CommandsPageText = {
   globalIntro: string
   /** Shown under a command that changes something outside this machine. */
   mutates: string
+  /** Shown instead under a command marked `local`, which changes only this machine; without it, nothing is. */
+  mutatesLocal?: string
   exitHeading: string
   exitIntro: string
   /** Markdown after the exit codes; may be empty. */
@@ -111,7 +113,8 @@ export const commandsPage = ({ cli, commands, options, labels, text }: CommandsP
 
   const body = (command: CommandInfo): string[] => {
     const parts = [cell(command.description), ""]
-    if (command.mutates) parts.push(text.mutates, "")
+    const label = command.mutates ? (command.local ? text.mutatesLocal : text.mutates) : undefined
+    if (label) parts.push(label, "")
     parts.push("```sh", command.usage, "```")
     if (command.arguments.length > 0)
       parts.push("", `| ${labels.argument} | | ${labels.isWhat} |`, "|---|---|---|", argumentRows(command.arguments))