diff --git a/docs/TELEMETRY.md b/docs/TELEMETRY.md
index 06e47a8fe..8f6ee92c7 100644
--- a/docs/TELEMETRY.md
+++ b/docs/TELEMETRY.md
@@ -78,7 +78,7 @@ director ids from `DIRECTOR_IDS` (and the legacy `worker` alias) are reported
 by id; project-defined or marketplace profile ids become `custom`.
 `skill_used` carries `skill_name`: a first-party skill name reportable by
 name from the closed `corbits-skills` allowlist (`ast-grep`, `create-issue`,
-`git-rebase`, `git-worktrees`, `implement`, `interview`,
+`git-rebase`, `git-worktrees`, `implement`, `interview`, `lexicon`,
 `linear-issue-workflow`, `opsh`, `philosophy`, `plan`,
 `pull-request-review`, `refactor`, `review`, `scribe`, `style`,
 `typescript`), or `custom` for anything else. `user-invocable: false` opts a
diff --git a/src/telemetry/classify.ts b/src/telemetry/classify.ts
index 8dce6be4a..ecb2f7c33 100644
--- a/src/telemetry/classify.ts
+++ b/src/telemetry/classify.ts
@@ -91,6 +91,7 @@ const FIRST_PARTY_SKILL_NAMES: ReadonlySet<string> = new Set([
   "git-worktrees",
   "implement",
   "interview",
+  "lexicon",
   "linear-issue-workflow",
   "opsh",
   "philosophy",
diff --git a/tests/unit/telemetry-product-events.test.ts b/tests/unit/telemetry-product-events.test.ts
index 8600e4827..9f5999fe9 100644
--- a/tests/unit/telemetry-product-events.test.ts
+++ b/tests/unit/telemetry-product-events.test.ts
@@ -228,6 +228,7 @@ test("first-party skill names are reported by name; everything else stays custom
     "git-worktrees",
     "implement",
     "interview",
+    "lexicon",
     "linear-issue-workflow",
     "opsh",
     "philosophy",