diff --git a/apps/cli/package.json b/apps/cli/package.json
index 5ecf7c9..dfd926b 100644
--- a/apps/cli/package.json
+++ b/apps/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "claudemesh-cli",
-  "version": "1.19.3",
+  "version": "1.20.0",
   "description": "Peer mesh for Claude Code sessions — CLI + MCP server.",
   "keywords": [
     "claude-code",
diff --git a/apps/cli/src/commands/slug.ts b/apps/cli/src/commands/slug.ts
new file mode 100644
index 0000000..cb225be
--- /dev/null
+++ b/apps/cli/src/commands/slug.ts
@@ -0,0 +1,83 @@
+/**
+ * `claudemesh slug <old-slug> <new-slug>` — change a mesh's slug.
+ *
+ * Slugs are NOT globally unique (mesh.id is canonical). Two users — or
+ * even the same user — can own meshes with identical slugs without
+ * colliding at the broker layer. The only collision risk is *local*:
+ * the CLI's config keys on slug, so two joined meshes with the same
+ * slug make the picker ambiguous. We refuse the rename in that case
+ * and point the user at the conflict.
+ *
+ * Other peers connected to this mesh keep using the old slug in their
+ * local configs until they run `claudemesh sync`. The broker doesn't
+ * care — it routes by mesh.id internally.
+ */
+
+import { reslug as reslugMesh } from "~/services/mesh/facade.js";
+import { getStoredToken } from "~/services/auth/facade.js";
+import { ApiError } from "~/services/api/facade.js";
+import { readConfig, setMeshConfig, removeMeshConfig } from "~/services/config/facade.js";
+import { bold, dim, green, icons } from "~/ui/styles.js";
+import { EXIT } from "~/constants/exit-codes.js";
+
+const SLUG_RE = /^[a-z0-9][a-z0-9-]{1,31}$/;
+
+export async function slug(oldSlug: string, newSlug: string): Promise<number> {
+  if (!oldSlug || !newSlug) {
+    console.error(`  ${icons.cross} Usage: ${bold("claudemesh slug")} <old-slug> <new-slug>`);
+    return EXIT.INVALID_ARGS;
+  }
+  if (!SLUG_RE.test(newSlug)) {
+    console.error(`  ${icons.cross} Invalid slug: must be 2-32 chars, lowercase alnum + hyphens, start with alnum`);
+    return EXIT.INVALID_ARGS;
+  }
+  if (oldSlug === newSlug) {
+    console.error(`  ${icons.cross} Old and new slug are the same.`);
+    return EXIT.INVALID_ARGS;
+  }
+
+  const auth = getStoredToken();
+  if (!auth) {
+    console.error(`  ${icons.cross} Renaming a mesh requires a claudemesh.com account session.`);
+    console.error(`  ${dim("Run")} ${bold("claudemesh login")} ${dim("first.")}`);
+    return EXIT.AUTH_FAILED;
+  }
+
+  // Local-collision check: refuse if another joined mesh already owns
+  // this slug locally. The broker would happily accept the change, but
+  // the CLI picker keys on slug — we'd render two indistinguishable
+  // entries.
+  const cfg = readConfig();
+  const collision = cfg.meshes.find((m) => m.slug === newSlug && m.slug !== oldSlug);
+  if (collision) {
+    console.error(`  ${icons.cross} Slug "${newSlug}" already used locally by another joined mesh.`);
+    console.error(`  ${dim("Pick a different slug, or leave the other mesh first.")}`);
+    return EXIT.ALREADY_EXISTS;
+  }
+
+  try {
+    const updated = await reslugMesh(oldSlug, newSlug);
+    // Reflect the new slug in local config so the picker / --mesh
+    // flag work without needing `claudemesh sync` afterwards.
+    const local = cfg.meshes.find((m) => m.slug === oldSlug);
+    if (local) {
+      removeMeshConfig(oldSlug);
+      setMeshConfig(updated.slug, { ...local, slug: updated.slug, name: updated.name });
+    }
+    console.log(`  ${green(icons.check)} Slug changed: "${oldSlug}" → "${updated.slug}"`);
+    console.log(`  ${dim("Other peers will pick up the new slug after they run")} ${bold("claudemesh sync")}`);
+    return EXIT.SUCCESS;
+  } catch (err) {
+    if (err instanceof ApiError) {
+      const body = err.body as { error?: string } | undefined;
+      console.error(`  ${icons.cross} ${body?.error ?? err.statusText}`);
+      if (err.status === 401) return EXIT.AUTH_FAILED;
+      if (err.status === 403) return EXIT.PERMISSION_DENIED;
+      if (err.status === 404) return EXIT.NOT_FOUND;
+      if (err.status === 400) return EXIT.INVALID_ARGS;
+      return EXIT.INTERNAL_ERROR;
+    }
+    console.error(`  ${icons.cross} Failed: ${err instanceof Error ? err.message : err}`);
+    return EXIT.INTERNAL_ERROR;
+  }
+}
diff --git a/apps/cli/src/entrypoints/cli.ts b/apps/cli/src/entrypoints/cli.ts
index 7ddfd2a..2d994e0 100644
--- a/apps/cli/src/entrypoints/cli.ts
+++ b/apps/cli/src/entrypoints/cli.ts
@@ -73,7 +73,8 @@ Mesh
   claudemesh launch [slug]         launch Claude Code on a mesh (alias: connect)
   claudemesh list                  show your meshes (alias: ls)
   claudemesh delete [slug]         delete a mesh (alias: rm)
-  claudemesh rename <slug> <name>  rename a mesh
+  claudemesh rename <slug> <name>  rename a mesh's display name (slug stays)
+  claudemesh slug <old> <new>      change a mesh's slug (URL-safe identifier)
   claudemesh share [email]         share mesh (invite link / send email)
 
 Peer (resource form, recommended)
@@ -312,6 +313,7 @@ async function main(): Promise<void> {
     case "list": case "ls": { const { runList } = await import("~/commands/list.js"); await runList(); break; }
     case "delete": case "rm": { const { deleteMesh } = await import("~/commands/delete-mesh.js"); process.exit(await deleteMesh(positionals[0] ?? "", { yes: !!flags.y || !!flags.yes })); break; }
     case "rename": { const { rename } = await import("~/commands/rename.js"); process.exit(await rename(positionals[0] ?? "", positionals[1] ?? "")); break; }
+    case "slug": { const { slug } = await import("~/commands/slug.js"); process.exit(await slug(positionals[0] ?? "", positionals[1] ?? "")); break; }
     case "share": case "invite": { const { invite } = await import("~/commands/invite.js"); process.exit(await invite(positionals[0], { mesh: flags.mesh as string, json: !!flags.json })); break; }
     case "disconnect": { const { runDisconnect } = await import("~/commands/kick.js"); process.exit(await runDisconnect(positionals[0], { mesh: flags.mesh as string, stale: flags.stale as string, all: !!flags.all })); break; }
     case "kick": { const { runKick } = await import("~/commands/kick.js"); process.exit(await runKick(positionals[0], { mesh: flags.mesh as string, stale: flags.stale as string, all: !!flags.all })); break; }
diff --git a/apps/cli/src/services/api/my.ts b/apps/cli/src/services/api/my.ts
index c6afc1a..6b17139 100644
--- a/apps/cli/src/services/api/my.ts
+++ b/apps/cli/src/services/api/my.ts
@@ -31,6 +31,15 @@ export async function renameMesh(token: string, slug: string, newName: string) {
   });
 }
 
+export async function reslugMesh(token: string, oldSlug: string, newSlug: string) {
+  return request<{ slug: string; name: string }>({
+    path: `/api/cli/meshes/${oldSlug}`,
+    method: "PATCH",
+    body: { slug: newSlug },
+    token,
+  });
+}
+
 export async function createInvite(
   token: string,
   meshSlug: string,
diff --git a/apps/cli/src/services/mesh/facade.ts b/apps/cli/src/services/mesh/facade.ts
index b8fd725..6e9034e 100644
--- a/apps/cli/src/services/mesh/facade.ts
+++ b/apps/cli/src/services/mesh/facade.ts
@@ -1,6 +1,7 @@
 export { listMeshes as list } from "./list.js";
 export { createMesh as create } from "./create.js";
 export { renameMesh as rename } from "./rename.js";
+export { reslugMesh as reslug } from "./reslug.js";
 export { leaveMesh as leave } from "./leave.js";
 export { joinMesh as join, joinMesh } from "./join.js";
 export { resolveTarget } from "./resolve-target.js";
diff --git a/apps/cli/src/services/mesh/reslug.ts b/apps/cli/src/services/mesh/reslug.ts
new file mode 100644
index 0000000..6a41718
--- /dev/null
+++ b/apps/cli/src/services/mesh/reslug.ts
@@ -0,0 +1,8 @@
+import { my } from "~/services/api/facade.js";
+import { getStoredToken } from "~/services/auth/facade.js";
+
+export async function reslugMesh(oldSlug: string, newSlug: string): Promise<{ slug: string; name: string }> {
+  const auth = getStoredToken();
+  if (!auth) throw new Error("Not signed in");
+  return await my.reslugMesh(auth.session_token, oldSlug, newSlug);
+}
diff --git a/apps/web/src/app/api/cli/meshes/[slug]/route.ts b/apps/web/src/app/api/cli/meshes/[slug]/route.ts
index 9632dcc..fb526b8 100644
--- a/apps/web/src/app/api/cli/meshes/[slug]/route.ts
+++ b/apps/web/src/app/api/cli/meshes/[slug]/route.ts
@@ -1,5 +1,5 @@
 import { NextResponse } from "next/server";
-import { eq, and } from "drizzle-orm";
+import { eq } from "drizzle-orm";
 
 import { db } from "@turbostarter/db/server";
 import { mesh } from "@turbostarter/db/schema/mesh";
@@ -79,19 +79,33 @@ export async function PATCH(
   }
 
   const { slug } = await params;
-  let body: { name?: string };
+  let body: { name?: string; slug?: string };
   try {
-    body = (await request.json()) as { name?: string };
+    body = (await request.json()) as { name?: string; slug?: string };
   } catch {
     return NextResponse.json({ error: "invalid JSON body" }, { status: 400 });
   }
   const newName = body.name?.trim();
-  if (!newName) {
-    return NextResponse.json({ error: "name is required" }, { status: 400 });
+  const newSlug = body.slug?.trim();
+
+  if (!newName && !newSlug) {
+    return NextResponse.json({ error: "name or slug is required" }, { status: 400 });
   }
-  if (newName.length > 80) {
+  if (newName !== undefined && newName.length > 80) {
     return NextResponse.json({ error: "name too long (max 80 chars)" }, { status: 400 });
   }
+  // Slug regex matches the CLI's pre-flight check. Lowercase only,
+  // must start with alnum, may contain hyphens, 2-32 chars total.
+  // Slugs are NOT globally unique (mesh.id is canonical) — see schema
+  // comment on mesh.slug — so we don't enforce a uniqueness collision
+  // here. Local CLI configs key on slug, so the picker collides
+  // locally; that's the user's call.
+  if (newSlug !== undefined && !/^[a-z0-9][a-z0-9-]{1,31}$/.test(newSlug)) {
+    return NextResponse.json(
+      { error: "slug must be 2-32 chars, lowercase alnum + hyphens, start with alnum" },
+      { status: 400 },
+    );
+  }
 
   // Look up the mesh first so we can distinguish "doesn't exist"
   // (404) from "exists but you don't own it" (403). The CLI was
@@ -118,9 +132,13 @@ export async function PATCH(
     );
   }
 
+  const patch: { name?: string; slug?: string } = {};
+  if (newName !== undefined) patch.name = newName;
+  if (newSlug !== undefined) patch.slug = newSlug;
+
   const [updated] = await db
     .update(mesh)
-    .set({ name: newName })
+    .set(patch)
     .where(eq(mesh.slug, slug))
     .returning({ slug: mesh.slug, name: mesh.name });
 
diff --git a/docs/roadmap.md b/docs/roadmap.md
index 977ccaa..f1586d1 100644
--- a/docs/roadmap.md
+++ b/docs/roadmap.md
@@ -298,6 +298,18 @@ level, or wire claudemesh to messaging surfaces beyond Claude Code.
   default returns last 30d). CLI: omitting `--mesh` on each
   verb routes through the matching aggregator. *Shipped
   2026-05-03 in CLI v1.16.0.*
+- **v0.6.2 — `claudemesh slug <old> <new>`** — change a mesh's
+  URL-safe slug (the identifier the CLI picker, `--mesh` flag,
+  and dashboard sidebar all key on). Slugs are NOT globally
+  unique — `mesh.id` is canonical — so the route only validates
+  the regex (`^[a-z0-9][a-z0-9-]{1,31}$`); it does not enforce
+  cross-user uniqueness. The CLI does refuse a local collision
+  (two joined meshes with the same slug would make the picker
+  ambiguous). On success, local config rewrites the slug in
+  place; other peers heal on next `claudemesh sync`. Server-side
+  reuses the existing `PATCH /api/cli/meshes/:slug` route — body
+  now accepts `{ name?, slug? }`. *Shipped 2026-05-03 in CLI
+  v1.20.0 + web.*
 - **v0.6.1 — `claudemesh rename` actually works** — adds the
   missing endpoint `PATCH /api/cli/meshes/:slug` on the web app.
   Lives under `/api/cli/*` (not `/api/my/*`) because the CLI's