diff --git a/Cargo.lock b/Cargo.lock
index 62d2a00605..e007890c03 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4849,6 +4849,27 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "trios-claude-broutput"
+version = "0.1.0"
+dependencies = [
+ "trios-claude-cl00",
+ "trios-claude-cl01",
+ "trios-claude-cl02",
+]
+
+[[package]]
+name = "trios-claude-cl00"
+version = "0.1.0"
+
+[[package]]
+name = "trios-claude-cl01"
+version = "0.1.0"
+
+[[package]]
+name = "trios-claude-cl02"
+version = "0.1.0"
+
 [[package]]
 name = "trios-cli"
 version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 578a089ce0..75d233b397 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -65,6 +65,11 @@ members = [
     "vendor/tri-mcp/rings/SR-00",
     "vendor/tri-mcp/rings/SR-01",
     "vendor/tri-mcp/rings/SR-02",
+    # trios-claude — ring scaffold (issue #238)
+    "crates/trios-claude/rings/CL-00",
+    "crates/trios-claude/rings/CL-01",
+    "crates/trios-claude/rings/CL-02",
+    "crates/trios-claude/rings/BR-OUTPUT",
 ]
 exclude = [
     "crates/trios-ext",
diff --git a/crates/trios-claude/AGENTS.md b/crates/trios-claude/AGENTS.md
new file mode 100644
index 0000000000..69dc906ac8
--- /dev/null
+++ b/crates/trios-claude/AGENTS.md
@@ -0,0 +1,45 @@
+# AGENTS.md — trios-claude
+
+> AAIF-compliant (Linux Foundation Agentic AI Foundation)
+> MCP-compatible agent instructions
+
+## Identity
+
+- Crate: trios-claude
+- Tier: 2 (SILVER)
+- Status: Scaffolded (logic migration: TODO)
+- Repo: gHashTag/trios
+
+## What this crate does
+
+Existing logic in `src/`. The `rings/` directory contains scaffold packages
+for the future ring-isolation migration per issue #238.
+
+## Ring map
+
+| Ring | Package | Role | Sealed |
+|------|---------|------|--------|
+| CL-00 | trios-claude-cl-00 | client | No |
+| CL-01 | trios-claude-cl-01 | tools | No |
+| CL-02 | trios-claude-cl-02 | dispatch | No |
+| BR-OUTPUT | trios-claude-br-output | assembly | No |
+
+## Rules (ABSOLUTE)
+
+- Read repo `LAWS.md` and `CLAUDE.md` before any action
+- L-ARCH-001: After migration, logic lives in `rings/` — `src/lib.rs` becomes RE-EXPORT
+- R1–R5: Ring Isolation
+- R9: No cross-ring imports except via Cargo.toml
+- L6: Pure Rust only
+- L7: Experience line per merge
+
+## Migration plan
+
+1. Stub rings exist with passing tests (this PR)
+2. Future PR: extract types/logic from `src/` into appropriate rings
+3. `src/lib.rs` becomes thin re-export facade
+
+## You MAY NOT (until migration complete)
+
+- ❌ Add new logic to `rings/<ring>/src/lib.rs` beyond stub types
+- ❌ Cross-import rings without Cargo.toml declaration
diff --git a/crates/trios-claude/RING.md b/crates/trios-claude/RING.md
new file mode 100644
index 0000000000..745acc8c28
--- /dev/null
+++ b/crates/trios-claude/RING.md
@@ -0,0 +1,48 @@
+# RING — trios-claude
+
+## Identity
+
+| Field | Value |
+|-------|-------|
+| Metal | 🥈 Silver (Tier 2) |
+| Type | Crate (scaffold — logic migration: TODO) |
+| Sealed | No |
+
+## Purpose
+
+Scaffold for ring-isolation architecture (issue #238).
+Current logic lives in `src/` — rings are organizational placeholders for future migration.
+
+## Ring Structure (L-ARCH-001)
+
+```
+crates/trios-claude/
+├── src/                ← existing logic (untouched)
+├── rings/
+│   ├── CL-00/             ← client
+│   ├── CL-01/             ← tools
+│   ├── CL-02/             ← dispatch
+│   ├── BR-OUTPUT/             ← assembly
+└── RING.md, AGENTS.md
+```
+
+## Dependency Flow
+
+```
+BR-OUTPUT
+    ↓
+  CL-00   CL-01   CL-02 
+```
+
+No ring imports a sibling at the same level. Logic-bearing rings (non-BR) are independent.
+
+## Anchor
+
+`phi^2 + phi^-2 = 3 · TRINITY · NEVER STOP`
+
+## Laws
+
+- L-ARCH-001: Only `rings/` contains logic (after migration)
+- R1–R5: Ring Isolation
+- L6: Pure Rust only
+- R9: Ring isolation (no cross-ring imports except via Cargo.toml)
diff --git a/crates/trios-claude/rings/BR-OUTPUT/AGENTS.md b/crates/trios-claude/rings/BR-OUTPUT/AGENTS.md
new file mode 100644
index 0000000000..bceac80f16
--- /dev/null
+++ b/crates/trios-claude/rings/BR-OUTPUT/AGENTS.md
@@ -0,0 +1,38 @@
+# AGENTS.md — BR-OUTPUT (trios-claude)
+
+> AAIF-compliant | MCP-compatible
+
+## Identity
+
+- Ring: BR-OUTPUT
+- Package: trios-claude-broutput
+- Role: assembly (scaffold — logic migration: TODO)
+
+## What this ring does (target)
+
+Owns assembly logic for trios-claude after migration.
+Currently a stub with a marker type and metadata constants.
+
+## Rules (ABSOLUTE)
+
+- R1: Sibling rings may not be imported without Cargo.toml declaration
+- R9: Ring isolation
+- L6: Pure Rust only
+
+## You MAY
+
+- ✅ Add types/methods within this ring's scope (assembly)
+- ✅ Add unit tests
+- ✅ Migrate code from `crates/trios-claude/src/` matching this ring's scope
+
+## You MAY NOT
+
+- ❌ Import sibling rings without Cargo.toml dep
+- ❌ Add I/O or async without explicit approval (check parent crate's policy)
+
+## Build
+
+```bash
+cargo check -p trios-claude-broutput
+cargo test  -p trios-claude-broutput
+```
diff --git a/crates/trios-claude/rings/BR-OUTPUT/Cargo.toml b/crates/trios-claude/rings/BR-OUTPUT/Cargo.toml
new file mode 100644
index 0000000000..98fa217328
--- /dev/null
+++ b/crates/trios-claude/rings/BR-OUTPUT/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "trios-claude-broutput"
+version = "0.1.0"
+edition = "2021"
+authors = ["Dmitrii Vasilev"]
+license = "MIT"
+description = "BR-OUTPUT — assembly (scaffold for trios-claude, issue #238)"
+publish = false
+
+[dependencies]
+trios-claude-cl00 = { path = "../CL-00" }
+trios-claude-cl01 = { path = "../CL-01" }
+trios-claude-cl02 = { path = "../CL-02" }
diff --git a/crates/trios-claude/rings/BR-OUTPUT/README.md b/crates/trios-claude/rings/BR-OUTPUT/README.md
new file mode 100644
index 0000000000..37533782c3
--- /dev/null
+++ b/crates/trios-claude/rings/BR-OUTPUT/README.md
@@ -0,0 +1,16 @@
+# BR-OUTPUT — assembly
+
+Ring scaffold for **trios-claude** (issue #238).
+
+- Package: `trios-claude-broutput`
+- Status: Scaffolded
+- Logic migration: TODO
+
+## Build
+
+```bash
+cargo check -p trios-claude-broutput
+cargo test  -p trios-claude-broutput
+```
+
+Anchor: `phi^2 + phi^-2 = 3`
diff --git a/crates/trios-claude/rings/BR-OUTPUT/TASK.md b/crates/trios-claude/rings/BR-OUTPUT/TASK.md
new file mode 100644
index 0000000000..26daa2acab
--- /dev/null
+++ b/crates/trios-claude/rings/BR-OUTPUT/TASK.md
@@ -0,0 +1,17 @@
+# TASK — BR-OUTPUT (trios-claude)
+
+## Status: Scaffolded (logic migration: TODO)
+
+## Completed
+
+- [x] Ring directory created
+- [x] `Cargo.toml` registered as workspace member
+- [x] Stub `BrOutputScope` / assembly type with metadata constants
+- [x] At least one passing unit test
+
+## Open
+
+- [ ] Migrate assembly logic from `crates/trios-claude/src/` into this ring
+- [ ] Define public API surface for BR-OUTPUT
+- [ ] Add integration tests covering migrated behavior
+- [ ] Update `crates/trios-claude/src/lib.rs` to re-export from this ring
diff --git a/crates/trios-claude/rings/BR-OUTPUT/src/lib.rs b/crates/trios-claude/rings/BR-OUTPUT/src/lib.rs
new file mode 100644
index 0000000000..003234a08f
--- /dev/null
+++ b/crates/trios-claude/rings/BR-OUTPUT/src/lib.rs
@@ -0,0 +1,32 @@
+//! BR-OUTPUT — assembly ring for trios-claude
+//!
+//! Scaffold (issue #238). Logic migration: TODO.
+//! Assembles sibling rings into a unified facade.
+
+/// Marker type for the trios-claude assembly facade.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+pub struct ClaudeAssembly;
+
+impl ClaudeAssembly {
+    pub fn new() -> Self {
+        Self
+    }
+
+    /// Anchor invariant: phi^2 + phi^-2 = 3
+    pub const TRINITY_ANCHOR: &'static str = "phi^2 + phi^-2 = 3";
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn assembly_constructs() {
+        let _a = ClaudeAssembly::new();
+    }
+
+    #[test]
+    fn anchor_is_set() {
+        assert_eq!(ClaudeAssembly::TRINITY_ANCHOR, "phi^2 + phi^-2 = 3");
+    }
+}
diff --git a/crates/trios-claude/rings/CL-00/AGENTS.md b/crates/trios-claude/rings/CL-00/AGENTS.md
new file mode 100644
index 0000000000..13ede223f9
--- /dev/null
+++ b/crates/trios-claude/rings/CL-00/AGENTS.md
@@ -0,0 +1,38 @@
+# AGENTS.md — CL-00 (trios-claude)
+
+> AAIF-compliant | MCP-compatible
+
+## Identity
+
+- Ring: CL-00
+- Package: trios-claude-cl00
+- Role: client (scaffold — logic migration: TODO)
+
+## What this ring does (target)
+
+Owns client logic for trios-claude after migration.
+Currently a stub with a marker type and metadata constants.
+
+## Rules (ABSOLUTE)
+
+- R1: Sibling rings may not be imported without Cargo.toml declaration
+- R9: Ring isolation
+- L6: Pure Rust only
+
+## You MAY
+
+- ✅ Add types/methods within this ring's scope (client)
+- ✅ Add unit tests
+- ✅ Migrate code from `crates/trios-claude/src/` matching this ring's scope
+
+## You MAY NOT
+
+- ❌ Import sibling rings without Cargo.toml dep
+- ❌ Add I/O or async without explicit approval (check parent crate's policy)
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl00
+cargo test  -p trios-claude-cl00
+```
diff --git a/crates/trios-claude/rings/CL-00/Cargo.toml b/crates/trios-claude/rings/CL-00/Cargo.toml
new file mode 100644
index 0000000000..a548a27fd3
--- /dev/null
+++ b/crates/trios-claude/rings/CL-00/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "trios-claude-cl00"
+version = "0.1.0"
+edition = "2021"
+authors = ["Dmitrii Vasilev"]
+license = "MIT"
+description = "CL-00 — client (scaffold for trios-claude, issue #238)"
+publish = false
+
+[dependencies]
diff --git a/crates/trios-claude/rings/CL-00/README.md b/crates/trios-claude/rings/CL-00/README.md
new file mode 100644
index 0000000000..2e769e81bc
--- /dev/null
+++ b/crates/trios-claude/rings/CL-00/README.md
@@ -0,0 +1,16 @@
+# CL-00 — client
+
+Ring scaffold for **trios-claude** (issue #238).
+
+- Package: `trios-claude-cl00`
+- Status: Scaffolded
+- Logic migration: TODO
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl00
+cargo test  -p trios-claude-cl00
+```
+
+Anchor: `phi^2 + phi^-2 = 3`
diff --git a/crates/trios-claude/rings/CL-00/TASK.md b/crates/trios-claude/rings/CL-00/TASK.md
new file mode 100644
index 0000000000..ccb2f2cfd1
--- /dev/null
+++ b/crates/trios-claude/rings/CL-00/TASK.md
@@ -0,0 +1,17 @@
+# TASK — CL-00 (trios-claude)
+
+## Status: Scaffolded (logic migration: TODO)
+
+## Completed
+
+- [x] Ring directory created
+- [x] `Cargo.toml` registered as workspace member
+- [x] Stub `Cl00Scope` / assembly type with metadata constants
+- [x] At least one passing unit test
+
+## Open
+
+- [ ] Migrate client logic from `crates/trios-claude/src/` into this ring
+- [ ] Define public API surface for CL-00
+- [ ] Add integration tests covering migrated behavior
+- [ ] Update `crates/trios-claude/src/lib.rs` to re-export from this ring
diff --git a/crates/trios-claude/rings/CL-00/src/lib.rs b/crates/trios-claude/rings/CL-00/src/lib.rs
new file mode 100644
index 0000000000..a24cd5f266
--- /dev/null
+++ b/crates/trios-claude/rings/CL-00/src/lib.rs
@@ -0,0 +1,27 @@
+//! CL-00 — client (scaffold)
+//!
+//! Scaffold ring for trios-claude (issue #238). Logic migration: TODO.
+
+/// Marker for CL-00 ring scope (client).
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+pub struct Cl00Scope;
+
+impl Cl00Scope {
+    pub const RING: &'static str = "CL-00";
+    pub const PURPOSE: &'static str = "client";
+
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn scope_metadata() {
+        assert_eq!(Cl00Scope::RING, "CL-00");
+        assert_eq!(Cl00Scope::PURPOSE, "client");
+    }
+}
diff --git a/crates/trios-claude/rings/CL-01/AGENTS.md b/crates/trios-claude/rings/CL-01/AGENTS.md
new file mode 100644
index 0000000000..d95ad323ae
--- /dev/null
+++ b/crates/trios-claude/rings/CL-01/AGENTS.md
@@ -0,0 +1,38 @@
+# AGENTS.md — CL-01 (trios-claude)
+
+> AAIF-compliant | MCP-compatible
+
+## Identity
+
+- Ring: CL-01
+- Package: trios-claude-cl01
+- Role: tools (scaffold — logic migration: TODO)
+
+## What this ring does (target)
+
+Owns tools logic for trios-claude after migration.
+Currently a stub with a marker type and metadata constants.
+
+## Rules (ABSOLUTE)
+
+- R1: Sibling rings may not be imported without Cargo.toml declaration
+- R9: Ring isolation
+- L6: Pure Rust only
+
+## You MAY
+
+- ✅ Add types/methods within this ring's scope (tools)
+- ✅ Add unit tests
+- ✅ Migrate code from `crates/trios-claude/src/` matching this ring's scope
+
+## You MAY NOT
+
+- ❌ Import sibling rings without Cargo.toml dep
+- ❌ Add I/O or async without explicit approval (check parent crate's policy)
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl01
+cargo test  -p trios-claude-cl01
+```
diff --git a/crates/trios-claude/rings/CL-01/Cargo.toml b/crates/trios-claude/rings/CL-01/Cargo.toml
new file mode 100644
index 0000000000..b9b56ab0b2
--- /dev/null
+++ b/crates/trios-claude/rings/CL-01/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "trios-claude-cl01"
+version = "0.1.0"
+edition = "2021"
+authors = ["Dmitrii Vasilev"]
+license = "MIT"
+description = "CL-01 — tools (scaffold for trios-claude, issue #238)"
+publish = false
+
+[dependencies]
diff --git a/crates/trios-claude/rings/CL-01/README.md b/crates/trios-claude/rings/CL-01/README.md
new file mode 100644
index 0000000000..b335b1819c
--- /dev/null
+++ b/crates/trios-claude/rings/CL-01/README.md
@@ -0,0 +1,16 @@
+# CL-01 — tools
+
+Ring scaffold for **trios-claude** (issue #238).
+
+- Package: `trios-claude-cl01`
+- Status: Scaffolded
+- Logic migration: TODO
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl01
+cargo test  -p trios-claude-cl01
+```
+
+Anchor: `phi^2 + phi^-2 = 3`
diff --git a/crates/trios-claude/rings/CL-01/TASK.md b/crates/trios-claude/rings/CL-01/TASK.md
new file mode 100644
index 0000000000..f055f9a99e
--- /dev/null
+++ b/crates/trios-claude/rings/CL-01/TASK.md
@@ -0,0 +1,17 @@
+# TASK — CL-01 (trios-claude)
+
+## Status: Scaffolded (logic migration: TODO)
+
+## Completed
+
+- [x] Ring directory created
+- [x] `Cargo.toml` registered as workspace member
+- [x] Stub `Cl01Scope` / assembly type with metadata constants
+- [x] At least one passing unit test
+
+## Open
+
+- [ ] Migrate tools logic from `crates/trios-claude/src/` into this ring
+- [ ] Define public API surface for CL-01
+- [ ] Add integration tests covering migrated behavior
+- [ ] Update `crates/trios-claude/src/lib.rs` to re-export from this ring
diff --git a/crates/trios-claude/rings/CL-01/src/lib.rs b/crates/trios-claude/rings/CL-01/src/lib.rs
new file mode 100644
index 0000000000..8842ccf369
--- /dev/null
+++ b/crates/trios-claude/rings/CL-01/src/lib.rs
@@ -0,0 +1,27 @@
+//! CL-01 — tools (scaffold)
+//!
+//! Scaffold ring for trios-claude (issue #238). Logic migration: TODO.
+
+/// Marker for CL-01 ring scope (tools).
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+pub struct Cl01Scope;
+
+impl Cl01Scope {
+    pub const RING: &'static str = "CL-01";
+    pub const PURPOSE: &'static str = "tools";
+
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn scope_metadata() {
+        assert_eq!(Cl01Scope::RING, "CL-01");
+        assert_eq!(Cl01Scope::PURPOSE, "tools");
+    }
+}
diff --git a/crates/trios-claude/rings/CL-02/AGENTS.md b/crates/trios-claude/rings/CL-02/AGENTS.md
new file mode 100644
index 0000000000..bfa1cf918a
--- /dev/null
+++ b/crates/trios-claude/rings/CL-02/AGENTS.md
@@ -0,0 +1,38 @@
+# AGENTS.md — CL-02 (trios-claude)
+
+> AAIF-compliant | MCP-compatible
+
+## Identity
+
+- Ring: CL-02
+- Package: trios-claude-cl02
+- Role: dispatch (scaffold — logic migration: TODO)
+
+## What this ring does (target)
+
+Owns dispatch logic for trios-claude after migration.
+Currently a stub with a marker type and metadata constants.
+
+## Rules (ABSOLUTE)
+
+- R1: Sibling rings may not be imported without Cargo.toml declaration
+- R9: Ring isolation
+- L6: Pure Rust only
+
+## You MAY
+
+- ✅ Add types/methods within this ring's scope (dispatch)
+- ✅ Add unit tests
+- ✅ Migrate code from `crates/trios-claude/src/` matching this ring's scope
+
+## You MAY NOT
+
+- ❌ Import sibling rings without Cargo.toml dep
+- ❌ Add I/O or async without explicit approval (check parent crate's policy)
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl02
+cargo test  -p trios-claude-cl02
+```
diff --git a/crates/trios-claude/rings/CL-02/Cargo.toml b/crates/trios-claude/rings/CL-02/Cargo.toml
new file mode 100644
index 0000000000..432c221905
--- /dev/null
+++ b/crates/trios-claude/rings/CL-02/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "trios-claude-cl02"
+version = "0.1.0"
+edition = "2021"
+authors = ["Dmitrii Vasilev"]
+license = "MIT"
+description = "CL-02 — dispatch (scaffold for trios-claude, issue #238)"
+publish = false
+
+[dependencies]
diff --git a/crates/trios-claude/rings/CL-02/README.md b/crates/trios-claude/rings/CL-02/README.md
new file mode 100644
index 0000000000..32ac806ce2
--- /dev/null
+++ b/crates/trios-claude/rings/CL-02/README.md
@@ -0,0 +1,16 @@
+# CL-02 — dispatch
+
+Ring scaffold for **trios-claude** (issue #238).
+
+- Package: `trios-claude-cl02`
+- Status: Scaffolded
+- Logic migration: TODO
+
+## Build
+
+```bash
+cargo check -p trios-claude-cl02
+cargo test  -p trios-claude-cl02
+```
+
+Anchor: `phi^2 + phi^-2 = 3`
diff --git a/crates/trios-claude/rings/CL-02/TASK.md b/crates/trios-claude/rings/CL-02/TASK.md
new file mode 100644
index 0000000000..95841ab218
--- /dev/null
+++ b/crates/trios-claude/rings/CL-02/TASK.md
@@ -0,0 +1,17 @@
+# TASK — CL-02 (trios-claude)
+
+## Status: Scaffolded (logic migration: TODO)
+
+## Completed
+
+- [x] Ring directory created
+- [x] `Cargo.toml` registered as workspace member
+- [x] Stub `Cl02Scope` / assembly type with metadata constants
+- [x] At least one passing unit test
+
+## Open
+
+- [ ] Migrate dispatch logic from `crates/trios-claude/src/` into this ring
+- [ ] Define public API surface for CL-02
+- [ ] Add integration tests covering migrated behavior
+- [ ] Update `crates/trios-claude/src/lib.rs` to re-export from this ring
diff --git a/crates/trios-claude/rings/CL-02/src/lib.rs b/crates/trios-claude/rings/CL-02/src/lib.rs
new file mode 100644
index 0000000000..b07437d767
--- /dev/null
+++ b/crates/trios-claude/rings/CL-02/src/lib.rs
@@ -0,0 +1,27 @@
+//! CL-02 — dispatch (scaffold)
+//!
+//! Scaffold ring for trios-claude (issue #238). Logic migration: TODO.
+
+/// Marker for CL-02 ring scope (dispatch).
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+pub struct Cl02Scope;
+
+impl Cl02Scope {
+    pub const RING: &'static str = "CL-02";
+    pub const PURPOSE: &'static str = "dispatch";
+
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn scope_metadata() {
+        assert_eq!(Cl02Scope::RING, "CL-02");
+        assert_eq!(Cl02Scope::PURPOSE, "dispatch");
+    }
+}