diff --git a/CHANGELOG.md b/CHANGELOG.md
index a102029a..19a63fb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -687,7 +687,7 @@ disconnected.
 ### Changed
 
 - **Tenant-suffixed room names are legal.** The room grammar accepts a double hyphen as a
-  segment separator (`x-review--team-02779b…`) — the shape xMesh scopes recipe rooms with.
+  segment separator (`x-review--team-02779b…`) — the shape xmesh scopes recipe rooms with.
   Before this, `sym join`, the daemon, and `sym_invite_create` all refused the very rooms
   the product creates, and only a direct service-type bypass made them work. Triple hyphens,
   leading/trailing hyphens and bare suffixes stay invalid.
diff --git a/README.md b/README.md
index 23df92cd..1d93b579 100644
--- a/README.md
+++ b/README.md
@@ -102,12 +102,12 @@ Run `sym --help` for the full command surface.
 - **SYM** is the open runtime and CLI. It carries the complete open core in its own tree —
   records, signing, baseline admission, default coupling — with no closed dependency, and the
   admission and coupling engines are injectable.
-- **xMesh** is the agent mesh runtime built on this foundation. The free
+- **xmesh** is the agent mesh runtime built on this foundation. The free
   [Developer Runtime](https://www.npmjs.com/package/@sym-bot/xmesh) runs locally or in any pod,
   and a coding agent drives it through MCP (`xmesh-mcp`): offer a mission, follow the board.
 - **Enterprise:** visit **[xmesh.bot](https://xmesh.bot)**.
 
-The xMesh source is private; its Developer Runtime is a free compiled artifact. SYM and
+The xmesh source is private; its Developer Runtime is a free compiled artifact. SYM and
 mesh-channel are open source.
 
 ## Security, and what the relay can and cannot see
diff --git a/docs/reference.md b/docs/reference.md
index 337c0fb7..6eac44a6 100644
--- a/docs/reference.md
+++ b/docs/reference.md
@@ -46,7 +46,7 @@ SYM is the runtime and CLI. It implements the open [Mesh Memory Protocol (MMP)](
 
 There is no central orchestrator deciding which agent matters. Each receiving peer evaluates incoming categories against its own state and retains its own decision boundary.
 
-> For headless, model-configured peers that run without a host IDE, see the public [`@sym-bot/xmesh-agent`](https://github.com/sym-bot/xmesh-agent) runtime. For enterprise AI integration, visit [xmesh.bot](https://xmesh.bot). The xMesh enterprise product and its codebase are private.
+> For headless, model-configured peers that run without a host IDE, see the public [`@sym-bot/xmesh-agent`](https://github.com/sym-bot/xmesh-agent) runtime. For enterprise AI integration, visit [xmesh.bot](https://xmesh.bot). The xmesh enterprise product and its codebase are private.
 
 ## Why do you need it?
 
diff --git a/docs/research-team-scenario.md b/docs/research-team-scenario.md
index 309218fb..5f30b084 100644
--- a/docs/research-team-scenario.md
+++ b/docs/research-team-scenario.md
@@ -39,7 +39,7 @@ This is not configuration. It's cognition. The validator doesn't see the data-ag
 
 **5. Emergent idea** — synthesis agent produces: *"emergence is evaluation-dependent — a property of the measurement apparatus, not the model."*
 
-> **What the mesh does:** This is where mesh cognition happens. The synthesis agent's xMesh LNN has been processing CMBs from all agents. It detects **convergence in the intent and motivation fields across agents with different perspectives:**
+> **What the mesh does:** This is where mesh cognition happens. The synthesis agent's xmesh LNN has been processing CMBs from all agents. It detects **convergence in the intent and motivation fields across agents with different perspectives:**
 > - explorer-a's motivation: "scaling law research needs reframing"
 > - explorer-b's motivation: "fix the lens before interpreting"
 > - validator's intent: "reject until correct method"
diff --git a/tests/docs-name-lowercase.test.js b/tests/docs-name-lowercase.test.js
new file mode 100644
index 00000000..7d0f3081
--- /dev/null
+++ b/tests/docs-name-lowercase.test.js
@@ -0,0 +1,34 @@
+'use strict';
+
+// The product name is xmesh, all lowercase, in every README and doc (founder, 2026-10-02: "all XMesh letter
+// must be lowercase. No any camel case"). This covers prose only: code identifiers (the XMesh class, the
+// _handleXMeshInsight handler) and XMESH_* names are not the product's name in prose and are not checked here.
+
+const { describe, it } = require('node:test');
+const assert = require('node:assert');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const ROOT = path.join(__dirname, '..');
+const walk = (dir) => fs.readdirSync(dir, { withFileTypes: true }).flatMap((e) => {
+  if (e.name === 'node_modules' || e.name === '.git') return [];
+  const p = path.join(dir, e.name);
+  return e.isDirectory() ? walk(p) : [p];
+});
+const docs = [
+  ...fs.readdirSync(ROOT).filter((f) => f.endsWith('.md')).map((f) => path.join(ROOT, f)),
+  ...['docs', '.github', '.agents', '.claude'].filter((d) => fs.existsSync(path.join(ROOT, d)))
+    .flatMap((d) => walk(path.join(ROOT, d))).filter((f) => f.endsWith('.md')),
+];
+
+describe('docs spell the product name xmesh', () => {
+  it('finds the docs it checks', () => {
+    assert.ok(docs.length >= 8, `scanned ${docs.length} docs`);
+  });
+  for (const f of docs) {
+    it(path.relative(ROOT, f), () => {
+      const text = fs.readFileSync(f, 'utf8').replace(/XMESH_[A-Z0-9_]*/g, '');
+      assert.doesNotMatch(text, /\bXMesh\b|\bxMesh\b|\bXmesh\b|\bXMESH\b/);
+    });
+  }
+});