diff --git a/.github/workflows/release-plz.yml b/.github/workflows/release-plz.yml
index 2163f203..86d35491 100644
--- a/.github/workflows/release-plz.yml
+++ b/.github/workflows/release-plz.yml
@@ -8,6 +8,7 @@ on:
 jobs:
   release-plz-release:
     name: Release-plz release
+    environment: release # Optional: for enhanced security
     runs-on: ubuntu-latest
     if: ${{ github.repository_owner == 'agentclientprotocol' }}
     permissions:
@@ -16,20 +17,32 @@ jobs:
     steps:
       - &checkout
         name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           fetch-depth: 0
-          persist-credentials: true
-          token: ${{ secrets.RELEASE_PLZ_TOKEN }}
+          persist-credentials: false
       - &install-rust
         name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@efa25f7f19611383d5b0ccf2d1c8914531636bf9
+        with:
+          toolchain: stable
+      - &generate-token
+        # Generating a GitHub token, so that PRs and tags created by
+        # the release-plz-action can trigger actions workflows.
+        name: Generate GitHub token
+        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859
+        id: generate-token
+        with:
+          # GitHub App ID secret name
+          app-id: ${{ secrets.RELEASE_PLZ_APP_ID }}
+          # GitHub App private key secret name
+          private-key: ${{ secrets.RELEASE_PLZ_APP_PRIVATE_KEY }}
       - name: Run release-plz
-        uses: release-plz/action@v0.5
+        uses: release-plz/action@1528104d2ca23787631a1c1f022abb64b34c1e11
         with:
           command: release
         env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_PLZ_TOKEN }}
+          GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
 
   release-plz-pr:
     name: Release-plz PR
@@ -44,9 +57,10 @@ jobs:
     steps:
       - *checkout
       - *install-rust
+      - *generate-token
       - name: Run release-plz
-        uses: release-plz/action@v0.5
+        uses: release-plz/action@1528104d2ca23787631a1c1f022abb64b34c1e11
         with:
           command: release-pr
         env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_PLZ_TOKEN }}
+          GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
diff --git a/book.toml b/book.toml
index 70302cc8..2e04ecde 100644
--- a/book.toml
+++ b/book.toml
@@ -10,5 +10,5 @@ command = "mdbook-mermaid"
 
 [output.html]
 additional-js = ["mermaid.min.js", "mermaid-init.js"]
-git-repository-url = "https://github.com/symposium-dev/symposium-acp"
-edit-url-template = "https://github.com/symposium-dev/symposium-acp/edit/main/{path}"
+git-repository-url = "https://github.com/agentclientprotocol/symposium-acp"
+edit-url-template = "https://github.com/agentclientprotocol/symposium-acp/edit/main/{path}"
diff --git a/src/sacp-conductor/.github/workflows/release-plz.yml b/src/sacp-conductor/.github/workflows/release-plz.yml
index a099ff1a..2163f203 100644
--- a/src/sacp-conductor/.github/workflows/release-plz.yml
+++ b/src/sacp-conductor/.github/workflows/release-plz.yml
@@ -9,7 +9,7 @@ jobs:
   release-plz-release:
     name: Release-plz release
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'symposium-dev' }}
+    if: ${{ github.repository_owner == 'agentclientprotocol' }}
     permissions:
       contents: write
       id-token: write
@@ -34,7 +34,7 @@ jobs:
   release-plz-pr:
     name: Release-plz PR
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'symposium-dev' }}
+    if: ${{ github.repository_owner == 'agentclientprotocol' }}
     permissions:
       pull-requests: write
       contents: write
diff --git a/src/sacp-conductor/Cargo.toml b/src/sacp-conductor/Cargo.toml
index 5581a1c9..5c6298e7 100644
--- a/src/sacp-conductor/Cargo.toml
+++ b/src/sacp-conductor/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "Conductor for orchestrating SACP proxy chains"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "agent", "conductor", "ai"]
 categories = ["development-tools"]
 
diff --git a/src/sacp-cookbook/Cargo.toml b/src/sacp-cookbook/Cargo.toml
index 70d29ce2..694c5e26 100644
--- a/src/sacp-cookbook/Cargo.toml
+++ b/src/sacp-cookbook/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "Cookbook of common patterns for building ACP components"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "agent", "proxy", "mcp", "cookbook"]
 categories = ["development-tools"]
 
diff --git a/src/sacp-cookbook/src/lib.rs b/src/sacp-cookbook/src/lib.rs
index 9b9c0a3d..91374e88 100644
--- a/src/sacp-cookbook/src/lib.rs
+++ b/src/sacp-cookbook/src/lib.rs
@@ -851,5 +851,5 @@ pub mod running_proxies_with_conductor {
     //!
     //! [`sacp-conductor`]: https://crates.io/crates/sacp-conductor
     //! [`SuccessorMessage`]: sacp::schema::SuccessorMessage
-    //! [`sacp-conductor` tests]: https://github.com/symposium-dev/symposium-acp/tree/main/src/sacp-conductor/tests
+    //! [`sacp-conductor` tests]: https://github.com/agentclientprotocol/symposium-acp/tree/main/src/sacp-conductor/tests
 }
diff --git a/src/sacp-rmcp/Cargo.toml b/src/sacp-rmcp/Cargo.toml
index 861cdc05..833e194c 100644
--- a/src/sacp-rmcp/Cargo.toml
+++ b/src/sacp-rmcp/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "rmcp integration for SACP proxy components"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "agent", "proxy", "mcp", "rmcp"]
 categories = ["development-tools"]
 
diff --git a/src/sacp-tokio/Cargo.toml b/src/sacp-tokio/Cargo.toml
index c7c98423..2905ddf1 100644
--- a/src/sacp-tokio/Cargo.toml
+++ b/src/sacp-tokio/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "Tokio-based utilities for SACP (Symposium's extensions to ACP)"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "agent", "protocol", "ai", "tokio"]
 categories = ["development-tools"]
 
diff --git a/src/sacp-trace-viewer/Cargo.toml b/src/sacp-trace-viewer/Cargo.toml
index 70f84f27..35427a18 100644
--- a/src/sacp-trace-viewer/Cargo.toml
+++ b/src/sacp-trace-viewer/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "Interactive sequence diagram viewer for SACP trace files"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "trace", "debugging", "visualization"]
 categories = ["development-tools::debugging"]
 
diff --git a/src/sacp/Cargo.toml b/src/sacp/Cargo.toml
index 04e40732..84a4eb2d 100644
--- a/src/sacp/Cargo.toml
+++ b/src/sacp/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "Core protocol types and traits for SACP (Symposium's extensions to ACP)"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 keywords = ["acp", "agent", "protocol", "ai"]
 categories = ["development-tools"]
 
diff --git a/src/sacp/README.md b/src/sacp/README.md
index 7c4909f6..3f4fc42c 100644
--- a/src/sacp/README.md
+++ b/src/sacp/README.md
@@ -48,7 +48,7 @@ Client.builder()
 See the [crate documentation](https://docs.rs/sacp) for:
 
 - **[Cookbook](https://docs.rs/sacp/latest/sacp/cookbook/)** - Patterns for building clients, proxies, and agents
-- **[Examples](https://github.com/symposium-dev/symposium-acp/tree/main/src/sacp/examples)** - Working code you can run
+- **[Examples](https://github.com/agentclientprotocol/symposium-acp/tree/main/src/sacp/examples)** - Working code you can run
 
 You may also enjoy looking at:
 
diff --git a/src/sacp/src/lib.rs b/src/sacp/src/lib.rs
index 829a6a6e..768abaa4 100644
--- a/src/sacp/src/lib.rs
+++ b/src/sacp/src/lib.rs
@@ -49,7 +49,7 @@
 //!
 //! For a complete working example, see [`yolo_one_shot_client.rs`][yolo].
 //!
-//! [yolo]: https://github.com/symposium-dev/symposium-acp/blob/main/src/sacp/examples/yolo_one_shot_client.rs
+//! [yolo]: https://github.com/agentclientprotocol/symposium-acp/blob/main/src/sacp/examples/yolo_one_shot_client.rs
 //!
 //! ## Cookbook
 //!
diff --git a/src/sacp/tests/jsonrpc_error_handling.rs b/src/sacp/tests/jsonrpc_error_handling.rs
index fdef3a90..9f2a5e83 100644
--- a/src/sacp/tests/jsonrpc_error_handling.rs
+++ b/src/sacp/tests/jsonrpc_error_handling.rs
@@ -157,7 +157,7 @@ async fn test_invalid_json() {
 // ============================================================================
 
 #[tokio::test]
-#[ignore = "hangs indefinitely - see https://github.com/symposium-dev/symposium-acp/issues/64"]
+#[ignore = "hangs indefinitely - see https://github.com/agentclientprotocol/symposium-acp/issues/64"]
 async fn test_incomplete_line() {
     use futures::io::Cursor;
 
diff --git a/src/yopo/Cargo.toml b/src/yopo/Cargo.toml
index a6abf726..2496562b 100644
--- a/src/yopo/Cargo.toml
+++ b/src/yopo/Cargo.toml
@@ -4,7 +4,7 @@ version = "11.0.0"
 edition = "2024"
 description = "YOPO (You Only Prompt Once) - A simple ACP client for one-shot prompts"
 license = "MIT OR Apache-2.0"
-repository = "https://github.com/symposium-dev/symposium-acp"
+repository = "https://github.com/agentclientprotocol/symposium-acp"
 
 [lib]
 path = "src/lib.rs"