diff --git a/.github/ISSUE_TEMPLATE/feature_request.yml b/.github/ISSUE_TEMPLATE/feature_request.yml
index d330cc69..d5e3a635 100644
--- a/.github/ISSUE_TEMPLATE/feature_request.yml
+++ b/.github/ISSUE_TEMPLATE/feature_request.yml
@@ -8,7 +8,7 @@ body:
     attributes:
       value: |
         Thanks for proposing a feature. flux is the LLM client + skill router
-        that backs the rho-eco ecosystem. Every feature is evaluated against
+        that backs the graycode-eco ecosystem. Every feature is evaluated against
         whether it serves **a single developer** running an AI agent locally.
 
         Before submitting:
@@ -65,6 +65,6 @@ body:
       description: flux avoids enterprise scope. Confirm this feature respects that.
       options:
         - label: Works with zero configuration (sensible defaults).
-        - label: Does not require a network call to a rho-eco service.
+        - label: Does not require a network call to a graycode-eco service.
         - label: Stores any state locally by default.
         - label: Has an escape hatch (override via flag, env, or config).
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 79ecb903..a3f75ba2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-# Strict CI pipeline for rho-eco Go repos.
+# Strict CI pipeline for graycode-eco Go repos.
 # All jobs must pass — no continue-on-error except where explicitly noted.
 
 name: CI
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a9417ef..53186838 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -114,7 +114,7 @@ v0.0.1 of `github.com/GrayCodeAI/flux`.
   5. Whitespace collapse
   Reports aggregate `BytesSaved` and `PercentOff` across all tools
   in the slice. Safe to call concurrently.
-  Aligns flux with the rest of the rho-eco ecosystem.
+  Aligns flux with the rest of the graycode-eco ecosystem.
 
 ### Added
 - Output guardrails framework (PII, secrets, injection, harmful content)
diff --git a/Makefile b/Makefile
index ac28836b..e39263d0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# Canonical rho-eco Makefile for Go LIBRARY repos.
+# Canonical graycode-eco Makefile for Go LIBRARY repos.
 # flux is a versioned Go library consumed by Rho (no standalone binary).
 
 # ---------------------------------------------------------------------------
diff --git a/client/extract_test.go b/client/extract_test.go
index 8d620ab2..cef9bb70 100644
--- a/client/extract_test.go
+++ b/client/extract_test.go
@@ -8,7 +8,7 @@ import (
 func TestFilterRelationships_DropsEmpty(t *testing.T) {
 	t.Parallel()
 	in := []Relationship{
-		{Subject: "flux", Predicate: "part_of", Object: "rho-eco"},
+		{Subject: "flux", Predicate: "part_of", Object: "graycode-eco"},
 		{Subject: "", Predicate: "x", Object: "y"},   // empty subject
 		{Subject: "a", Predicate: "  ", Object: "b"}, // blank predicate
 		{Subject: "c", Predicate: "rel", Object: ""}, // empty object
diff --git a/lefthook.yml b/lefthook.yml
index da4010b7..a90a7d57 100644
--- a/lefthook.yml
+++ b/lefthook.yml
@@ -1,4 +1,4 @@
-# Canonical lefthook config for rho-eco Go repos.
+# Canonical lefthook config for graycode-eco Go repos.
 # Source of truth: .shared-templates/lefthook.yml.tmpl
 #
 # Install lefthook: