diff --git a/CLAUDE.md b/CLAUDE.md
index af30ad8..ad6f9cf 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -13,7 +13,7 @@ This monorepo implements a stateless workflow engine driven by a single-step CLI
 | **Role** | A named actor within a workflow. Each role has a system prompt and a JSON Schema `outputSchema`. |
 | **Moderator** | Status-based graph evaluator — determines the next role (or `$END`) with zero LLM cost. |
 | **Agent** | An external CLI command (`uwf-hermes`, etc.) spawned by `uwf thread step`. Produces frontmatter markdown output. |
-| **CAS** | Content-Addressed Storage via `@uncaged/json-cas` — all workflow definitions, thread nodes, and outputs are immutable CAS nodes. |
+| **CAS** | Content-Addressed Storage via `@ocas/core` — all workflow definitions, thread nodes, and outputs are immutable CAS nodes. |
 | **Registry** | `~/.uncaged/workflow/registry.yaml` — maps workflow names to current CAS hashes. |
 
 ### Monorepo Structure
@@ -35,7 +35,7 @@ workflow/
 
 - Dependency layers: `workflow-protocol` → `workflow-util` → `workflow-util-agent` → `workflow-agent-hermes` / `cli-workflow`
 - Packages use `workspace:^` protocol (resolves to `^x.y.z` on publish)
-- External CAS: `@uncaged/json-cas` (store API, hashing, schema validation) + `@uncaged/json-cas-fs` (filesystem backend)
+- External CAS: `@ocas/core` (store API, hashing, schema validation) + `@ocas/fs` (filesystem backend)
 
 ## Language & Paradigm
 
diff --git a/README.md b/README.md
index 27d11fe..ef2f8d3 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ App (uses protocol; not in the runtime engine stack)
   workflow-dashboard         Web UI for visual workflow editing
 ```
 
-External CAS: [`@uncaged/json-cas`](https://www.npmjs.com/package/@uncaged/json-cas) (store API, hashing, schema validation) + `@uncaged/json-cas-fs` (filesystem backend).
+External CAS: [`@ocas/core`](https://www.npmjs.com/package/@ocas/core) (store API, hashing, schema validation) + `@ocas/fs` (filesystem backend).
 
 See [docs/architecture.md](docs/architecture.md) for the full design — three-phase engine loop, CAS node types, storage layout, agent CLI protocol, and design decisions.
 
diff --git a/docs/architecture.md b/docs/architecture.md
index b4f9a38..6745b60 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -8,13 +8,13 @@
 
 A stateless workflow engine driven by a single-step CLI. Workflows are YAML definitions stored as CAS nodes; threads are immutable chains of CAS-linked step nodes. No daemon — each `uwf thread step` invocation runs one moderator→agent→extract cycle and exits.
 
-The implementation lives in **5** active packages under `packages/`, plus two external CAS packages (`@uncaged/json-cas`, `@uncaged/json-cas-fs`). Legacy packages reside in `legacy-packages/` and are not part of the active stack.
+The implementation lives in **5** active packages under `packages/`, plus two external CAS packages (`@ocas/core`, `@ocas/fs`). Legacy packages reside in `legacy-packages/` and are not part of the active stack.
 
 ## Package map
 
 | Layer | Package | One-line role |
 |-------|---------|---------------|
-| Contract | `@uncaged/workflow-protocol` → `workflow-protocol` | Shared TypeScript types (`WorkflowPayload`, `StepNodePayload`, `ModeratorContext`, `WorkflowConfig`, etc.). No runtime deps beyond `@uncaged/json-cas-fs`. |
+| Contract | `@uncaged/workflow-protocol` → `workflow-protocol` | Shared TypeScript types (`WorkflowPayload`, `StepNodePayload`, `ModeratorContext`, `WorkflowConfig`, etc.). No runtime deps beyond `@ocas/fs`. |
 | Shared infra | `@uncaged/workflow-util` → `workflow-util` | Crockford Base32, ULID generation, `createLogger`, frontmatter parsing/validation. |
 | Agent framework | `@uncaged/workflow-util-agent` → `workflow-util-agent` | `createAgent` entrypoint factory, context builder, frontmatter fast-path extractor, LLM extract fallback, output format instruction builder. |
 | Agent: Hermes | `@uncaged/workflow-agent-hermes` → `workflow-agent-hermes` | `uwf-hermes` CLI binary — spawns `hermes chat`, pipes prompt, captures session detail. |
@@ -24,8 +24,8 @@ The implementation lives in **5** active packages under `packages/`, plus two ex
 
 | Package | Role |
 |---------|------|
-| `@uncaged/json-cas` | Content-addressed store API, XXH64 hashing, JSON Schema registration and validation. |
-| `@uncaged/json-cas-fs` | Filesystem backend for `json-cas`. |
+| `@ocas/core` | Content-addressed store API, XXH64 hashing, JSON Schema registration and validation. |
+| `@ocas/fs` | Filesystem backend for `ocas`. |
 | `mustache` | Template renderer for edge prompts (used by `cli-workflow` moderator). |
 | `commander` | CLI argument parsing (used by `cli-workflow`). |
 | `dotenv` | Loads `.env` files for API keys. |
@@ -36,8 +36,8 @@ The implementation lives in **5** active packages under `packages/`, plus two ex
 ```mermaid
 flowchart BT
   subgraph External
-    jcas["@uncaged/json-cas"]
-    jcasfs["@uncaged/json-cas-fs"]
+    jcas["@ocas/core"]
+    jcasfs["@ocas/fs"]
   end
   subgraph L0["Layer 0 — contract"]
     protocol["@uncaged/workflow-protocol"]
@@ -146,7 +146,7 @@ Key properties:
 - **`roles`** — inline role definitions; each `meta` is a JSON Schema (stored as its own CAS node on registration)
 - **`graph`** — `Record<Role | "$START", Record<Status, Target>>` — status-based routing; each role maps statuses to targets
 - **No agent binding** — agent selection is a deployment concern, configured in `config.yaml`
-- **No Zod** — all schemas are JSON Schema, validated through `@uncaged/json-cas`
+- **No Zod** — all schemas are JSON Schema, validated through `@ocas/core`
 
 ## Three-phase engine loop
 
@@ -263,7 +263,7 @@ Structured output extraction uses a two-layer strategy (`workflow-util-agent`):
 2. Validate required fields (`validateFrontmatter`)
 3. Build a candidate object from frontmatter fields (`status`, `next`, `confidence`, `artifacts`, `scope`)
 4. `store.put()` the candidate against the role's `meta` schema
-5. Validate with `json-cas` schema validation
+5. Validate with `ocas` schema validation
 6. If valid → return `outputHash` (zero LLM cost)
 
 ### Layer 2: LLM extract fallback (`extract.ts`)
@@ -302,7 +302,7 @@ payload:
       capabilities: [planning, issue-analysis]
       procedure: "Analyze the issue and create a plan."
       output: "Output the plan summary."
-      meta: "5GWKR8TN1V3JA"    # cas_ref → JSON Schema node
+      meta: "5GWKR8TN1V3JA"    # ocas_ref → JSON Schema node
   conditions:
     notApproved:
       description: "Reviewer rejected"
@@ -318,7 +318,7 @@ payload:
 ```yaml
 type: <start-node-schema-hash>
 payload:
-  workflow: "4KNM2PXR3B1QW"    # cas_ref → Workflow
+  workflow: "4KNM2PXR3B1QW"    # ocas_ref → Workflow
   prompt: "Fix the login bug..."
 ```
 
@@ -327,11 +327,11 @@ payload:
 ```yaml
 type: <step-node-schema-hash>
 payload:
-  start: "4TNVW8KR2B3MA"      # cas_ref → StartNode
-  prev: "2MXBG6PN4A8JR"       # cas_ref → previous StepNode (null for first step)
+  start: "4TNVW8KR2B3MA"      # ocas_ref → StartNode
+  prev: "2MXBG6PN4A8JR"       # ocas_ref → previous StepNode (null for first step)
   role: "developer"
-  output: "9KRVW3TN5F1QA"     # cas_ref → structured output (validated against meta schema)
-  detail: "7BQST3VW9F2MA"     # cas_ref → execution detail (raw turns, session data)
+  output: "9KRVW3TN5F1QA"     # ocas_ref → structured output (validated against meta schema)
+  detail: "7BQST3VW9F2MA"     # ocas_ref → execution detail (raw turns, session data)
   agent: "uwf-hermes"         # agent command used (plain string)
 ```
 
@@ -484,7 +484,7 @@ Binary: `uwf`
 | **Frontmatter markdown output** | Agents produce structured meta (YAML frontmatter) alongside free-form content (markdown body). Enables zero-cost extraction when frontmatter is well-formed. |
 | **Two-layer extract** | Fast path avoids LLM calls when agents follow the format; LLM fallback handles messy output gracefully. |
 | **Prompt injection for format** | Output format instruction prepended to system prompt ensures agents produce parseable output without per-agent configuration. |
-| **JSON Schema (not Zod)** | Schemas are CAS-native data — storable, hashable, validatable through `json-cas`. No code generation, no runtime library dependency. |
+| **JSON Schema (not Zod)** | Schemas are CAS-native data — storable, hashable, validatable through `ocas`. No code generation, no runtime library dependency. |
 | **Agent as external command** | Agents are independent CLI binaries (`uwf-hermes`, `uwf-cursor`). Swappable per workflow/role via config. No tight coupling to the engine. |
 | **No daemon** | Process starts, does one step, exits. Simpler failure model, no connection management. |
 | **Crockford Base32** | Filesystem-safe, case-insensitive, readable, compact. |
diff --git a/docs/builtin-agent-research.md b/docs/builtin-agent-research.md
index a76ae7b..96c6f1a 100644
--- a/docs/builtin-agent-research.md
+++ b/docs/builtin-agent-research.md
@@ -630,7 +630,7 @@ flowchart TB
   Spawn -->|"stdout: step hash"| Step
 ```
 
-**新包**：`packages/workflow-agent-builtin`，bin `uwf-builtin`，仅依赖 `workflow-util-agent`、`workflow-protocol`、`workflow-util`（可选 `@uncaged/json-cas` 写 detail schema）。
+**新包**：`packages/workflow-agent-builtin`，bin `uwf-builtin`，仅依赖 `workflow-util-agent`、`workflow-protocol`、`workflow-util`（可选 `@ocas/core` 写 detail schema）。
 
 **分层**：
 
diff --git a/docs/wf-stateless-design.md b/docs/wf-stateless-design.md
index 6a0b527..b6b05ee 100644
--- a/docs/wf-stateless-design.md
+++ b/docs/wf-stateless-design.md
@@ -22,7 +22,7 @@ uwf workflow show  <workflow-id>            # 查看 workflow 定义
 uwf workflow list                           # 列出已注册 workflows
 ```
 
-两组对称，各 3-4 个子命令。CAS 操作交给 `json-cas` CLI，不在 `uwf` 中重复。
+两组对称，各 3-4 个子命令。CAS 操作交给 `ocas` CLI，不在 `uwf` 中重复。
 
 ### 1.2 `uwf thread start`
 
@@ -136,14 +136,14 @@ uwf-hermes <thread-id> <role>
 
 沿用 json-cas 的三层：bootstrap meta-schema → JSON Schema nodes → data nodes。
 
-下面所有 CAS 节点都遵循 `{ type: cas_ref, payload: T, timestamp: number }` 的标准格式。
-`cas_ref` 类型的字符串字段在 json-cas 中已内置支持，不需要额外的 `$ref` 包装。
+下面所有 CAS 节点都遵循 `{ type: ocas_ref, payload: T, timestamp: number }` 的标准格式。
+`ocas_ref` 类型的字符串字段在 ocas 中已内置支持，不需要额外的 `$ref` 包装。
 
 ### 2.2 数据节点
 
 #### `Workflow`
 
-Roles 和 moderator 内联在 Workflow 中，只有 meta 独立为 CAS 节点（方便 json-cas 校验）。
+Roles 和 moderator 内联在 Workflow 中，只有 meta 独立为 CAS 节点（方便 ocas 校验）。
 
 ```yaml
 type: <workflow-schema-hash>
@@ -157,21 +157,21 @@ payload:
       capabilities: [planning, issue-analysis]
       procedure: "Analyze the issue and create a plan."
       output: "Output the plan summary."
-      meta: "5GWKR8TN1V3JA"    # cas_ref → JSON Schema 节点（json-cas 内置）
+      meta: "5GWKR8TN1V3JA"    # ocas_ref → JSON Schema 节点（ocas 内置）
     developer:
       description: "Implements code changes"
       goal: "You are a developer agent..."
       capabilities: [file-edit, shell]
       procedure: "Implement the plan."
       output: "List all files changed."
-      meta: "8CNWT4KR6D1HV"    # cas_ref → JSON Schema 节点
+      meta: "8CNWT4KR6D1HV"    # ocas_ref → JSON Schema 节点
     reviewer:
       description: "Reviews code changes"
       goal: "You are a code reviewer..."
       capabilities: [code-review]
       procedure: "Review the implementation."
       output: "Approve or reject with comments."
-      meta: "1VPBG9SM5E7WK"    # cas_ref → JSON Schema 节点
+      meta: "1VPBG9SM5E7WK"    # ocas_ref → JSON Schema 节点
   conditions:
     needsClarification:
       description: "Planner requests clarification from user"
@@ -198,7 +198,7 @@ payload:
         condition: null
 ```
 
-- `roles` — 内联定义，每个 role 的 `meta` 是独立的 cas_ref（指向 json-cas 内置 JSON Schema 节点）
+- `roles` — 内联定义，每个 role 的 `meta` 是独立的 ocas_ref（指向 ocas 内置 JSON Schema 节点）
 - `graph` — `Record<Role | "$START", Record<Status, Target>>`，每个 Target = `{ role, prompt }`
 - Status 来自上一个 role 输出的 `status` 字段，`$START` 用 `_` 作为初始 status
 - Prompt 模板使用 Mustache 渲染，变量来自 lastOutput
@@ -220,7 +220,7 @@ evaluate(graph, lastRole, lastOutput) → { role, prompt }
 ```yaml
 type: <start-node-schema-hash>
 payload:
-  workflow: "4KNM2PXR3B1QW"        # cas_ref → Workflow
+  workflow: "4KNM2PXR3B1QW"        # ocas_ref → Workflow
   prompt: "Fix the login bug..."
 ```
 
@@ -232,18 +232,18 @@ payload:
 ```yaml
 type: <step-node-schema-hash>
 payload:
-  start: "4TNVW8KR2B3MA"          # cas_ref → StartNode（每个 step 都引用）
-  prev: "2MXBG6PN4A8JR"           # cas_ref → 前一个 StepNode，第一步为 null
+  start: "4TNVW8KR2B3MA"          # ocas_ref → StartNode（每个 step 都引用）
+  prev: "2MXBG6PN4A8JR"           # ocas_ref → 前一个 StepNode，第一步为 null
   role: "developer"
-  output: "9KRVW3TN5F1QA"         # cas_ref → 结构化输出节点（符合 role 的 meta schema）
-  detail: "7BQST3VW9F2MA"         # cas_ref → 执行详情（content node / 子 workflow terminal StepNode / ...）
+  output: "9KRVW3TN5F1QA"         # ocas_ref → 结构化输出节点（符合 role 的 meta schema）
+  detail: "7BQST3VW9F2MA"         # ocas_ref → 执行详情（content node / 子 workflow terminal StepNode / ...）
   agent: "uwf-cursor"              # 实际使用的 agent 命令（纯字符串）
 ```
 
 - `start` — 每个 StepNode 都直接引用 StartNode，方便随机访问
-- `prev` — 前一个 StepNode 的 cas_ref，第一步为 `null`（不指向 StartNode）
-- `output` — cas_ref，指向符合 role meta schema 的 CAS 节点，可用 json-cas 校验
-- `detail` — cas_ref，指向执行详情。可以是原始 agent 输出（content node），也可以是子 workflow thread 的 terminal StepNode（workflowAsAgent 场景）
+- `prev` — 前一个 StepNode 的 ocas_ref，第一步为 `null`（不指向 StartNode）
+- `output` — ocas_ref，指向符合 role meta schema 的 CAS 节点，可用 ocas 校验
+- `detail` — ocas_ref，指向执行详情。可以是原始 agent 输出（content node），也可以是子 workflow thread 的 terminal StepNode（workflowAsAgent 场景）
 - `agent` — 纯字符串，不是 CAS 节点
 
 ### 2.3 链式结构
@@ -337,7 +337,7 @@ OPENROUTER_API_KEY=sk-or-...
 
 ## 3. 包结构
 
-全新包，不复用现有 packages，避免命名冲突。CAS 直接依赖 `@uncaged/json-cas`。
+全新包，不复用现有 packages，避免命名冲突。CAS 直接依赖 `@ocas/core`。
 
 ```
 packages/
@@ -349,8 +349,8 @@ packages/
 ```
 
 **外部依赖：**
-- `@uncaged/json-cas` — CAS 存储、hash、schema 校验
-- `@uncaged/json-cas-fs` — 文件系统 CAS 后端
+- `@ocas/core` — CAS 存储、hash、schema 校验
+- `@ocas/fs` — 文件系统 CAS 后端
 
 **现有包全部保留不动**，新旧并存，逐步迁移。
 
@@ -372,8 +372,8 @@ type ThreadId = string;
 /** 一个 step 的核心数据，被 StepNode payload 和 moderator 上下文共享 */
 type StepRecord = {
   role: string;
-  output: CasRef;                    // cas_ref → 结构化输出节点（符合 role meta schema）
-  detail: CasRef;                    // cas_ref → 执行详情（content node / 子 workflow terminal StepNode）
+  output: CasRef;                    // ocas_ref → 结构化输出节点（符合 role meta schema）
+  detail: CasRef;                    // ocas_ref → 执行详情（content node / 子 workflow terminal StepNode）
   agent: string;                     // 实际使用的 agent 命令（纯字符串）
 };
 ```
@@ -387,7 +387,7 @@ type RoleDefinition = {
   capabilities: string[];
   procedure: string;
   output: string;
-  meta: CasRef;                      // cas_ref → json-cas 内置 JSON Schema 节点
+  meta: CasRef;                      // ocas_ref → ocas 内置 JSON Schema 节点
 };
 
 type Target = {
@@ -407,13 +407,13 @@ type WorkflowPayload = {
 
 ```typescript
 type StartNodePayload = {
-  workflow: CasRef;                  // cas_ref → Workflow
+  workflow: CasRef;                  // ocas_ref → Workflow
   prompt: string;
 };
 
 type StepNodePayload = StepRecord & {
-  start: CasRef;                     // cas_ref → StartNode（每个 step 都引用）
-  prev: CasRef | null;               // cas_ref → 前一个 StepNode，第一步为 null
+  start: CasRef;                     // ocas_ref → StartNode（每个 step 都引用）
+  prev: CasRef | null;               // ocas_ref → 前一个 StepNode，第一步为 null
 };
 ```
 
diff --git a/packages/cli-workflow/README.md b/packages/cli-workflow/README.md
index 2f9dc92..48763dc 100644
--- a/packages/cli-workflow/README.md
+++ b/packages/cli-workflow/README.md
@@ -20,7 +20,7 @@ workflow → thread → step → turn
 
 This package has no library `src/index.ts` — it is consumed as a CLI binary only.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/json-cas-fs`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`, `commander`, `dotenv`, `mustache`, `yaml`
+**Dependencies:** `@ocas/core`, `@ocas/fs`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`, `commander`, `dotenv`, `mustache`, `yaml`
 
 ## Installation
 
@@ -209,7 +209,7 @@ src/
 | `~/.uncaged/workflow/.env` | API keys (referenced by `apiKeyEnv` in config) |
 | `~/.uncaged/workflow/registry.yaml` | Workflow name → CAS hash |
 | `~/.uncaged/workflow/threads.yaml` | Active thread head pointers |
-| `~/.uncaged/json-cas/` | Content-addressed node storage (unified CAS store, shared with `json-cas` CLI) |
+| `~/.uncaged/json-cas/` | Content-addressed node storage (unified CAS store, shared with `ocas` CLI) |
 
 ### Environment Variables
 
diff --git a/packages/cli-workflow/package.json b/packages/cli-workflow/package.json
index 311e630..c6d693c 100644
--- a/packages/cli-workflow/package.json
+++ b/packages/cli-workflow/package.json
@@ -11,8 +11,8 @@
     "uwf": "./dist/cli.js"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
-    "@uncaged/json-cas-fs": "^0.5.3",
+    "@ocas/core": "^0.1.1",
+    "@ocas/fs": "^0.1.1",
     "@uncaged/workflow-protocol": "workspace:^",
     "@uncaged/workflow-util": "workspace:^",
     "@uncaged/workflow-util-agent": "workspace:^",
diff --git a/packages/cli-workflow/src/__tests__/adapter-json-roundtrip.test.ts b/packages/cli-workflow/src/__tests__/adapter-json-roundtrip.test.ts
index 711ddb7..23538af 100644
--- a/packages/cli-workflow/src/__tests__/adapter-json-roundtrip.test.ts
+++ b/packages/cli-workflow/src/__tests__/adapter-json-roundtrip.test.ts
@@ -2,8 +2,8 @@ import { execFileSync } from "node:child_process";
 import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, StepNodePayload, ThreadId } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { registerUwfSchemas } from "../schemas.js";
diff --git a/packages/cli-workflow/src/__tests__/config.test.ts b/packages/cli-workflow/src/__tests__/config.test.ts
index 4f6b5e6..c8cb0c9 100644
--- a/packages/cli-workflow/src/__tests__/config.test.ts
+++ b/packages/cli-workflow/src/__tests__/config.test.ts
@@ -720,7 +720,7 @@ defaultModel: default
 
   describe("no legacy apiKeyEnv references", () => {
     test("config.ts has no references to apiKeyEnv", () => {
-      const configSource = readFileSync(join(__dirname, "..", "commands", "config.ts"), "utf8");
+      const configSource = readFileSync(join(__dirname, "..", "..", "src", "commands", "config.ts"), "utf8");
       expect(configSource).not.toContain("apiKeyEnv");
     });
 
diff --git a/packages/cli-workflow/src/__tests__/current-role.test.ts b/packages/cli-workflow/src/__tests__/current-role.test.ts
index 3a4d9bd..25f206c 100644
--- a/packages/cli-workflow/src/__tests__/current-role.test.ts
+++ b/packages/cli-workflow/src/__tests__/current-role.test.ts
@@ -1,7 +1,7 @@
 import { mkdir, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { putSchema } from "@uncaged/json-cas";
+import { putSchema } from "@ocas/core";
 import type { CasRef, ThreadId } from "@uncaged/workflow-protocol";
 import { describe, expect, test } from "vitest";
 import { createMarker, deleteMarker } from "../background/index.js";
diff --git a/packages/cli-workflow/src/__tests__/step-read.test.ts b/packages/cli-workflow/src/__tests__/step-read.test.ts
index 2e9fae9..0212c2d 100644
--- a/packages/cli-workflow/src/__tests__/step-read.test.ts
+++ b/packages/cli-workflow/src/__tests__/step-read.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { cmdStepRead } from "../commands/step.js";
@@ -40,7 +40,7 @@ const DETAIL_SCHEMA = {
     turnCount: { type: "integer" as const },
     turns: {
       type: "array" as const,
-      items: { type: "string" as const, format: "cas_ref" },
+      items: { type: "string" as const, format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/step-show-json.test.ts b/packages/cli-workflow/src/__tests__/step-show-json.test.ts
index 26eeaaf..168367f 100644
--- a/packages/cli-workflow/src/__tests__/step-show-json.test.ts
+++ b/packages/cli-workflow/src/__tests__/step-show-json.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, type Hash, type JSONSchema, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, type Hash, type JSONSchema, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, StepNodePayload } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { cmdStepShow } from "../commands/step.js";
@@ -45,7 +45,7 @@ const DETAIL_SCHEMA: JSONSchema = {
   properties: {
     turns: {
       type: "array",
-      items: { type: "string", format: "cas_ref" },
+      items: { type: "string", format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/step-timing.test.ts b/packages/cli-workflow/src/__tests__/step-timing.test.ts
index 24ae758..bfc38b2 100644
--- a/packages/cli-workflow/src/__tests__/step-timing.test.ts
+++ b/packages/cli-workflow/src/__tests__/step-timing.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, ThreadId } from "@uncaged/workflow-protocol";
 import { STEP_NODE_SCHEMA } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
@@ -43,7 +43,7 @@ const DETAIL_SCHEMA = {
     turnCount: { type: "integer" as const },
     turns: {
       type: "array" as const,
-      items: { type: "string" as const, format: "cas_ref" },
+      items: { type: "string" as const, format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/thread-read-quota.test.ts b/packages/cli-workflow/src/__tests__/thread-read-quota.test.ts
index 17b8585..6387ac7 100644
--- a/packages/cli-workflow/src/__tests__/thread-read-quota.test.ts
+++ b/packages/cli-workflow/src/__tests__/thread-read-quota.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, ThreadId } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { cmdThreadRead } from "../commands/thread.js";
@@ -41,7 +41,7 @@ const DETAIL_SCHEMA = {
     turnCount: { type: "integer" as const },
     turns: {
       type: "array" as const,
-      items: { type: "string" as const, format: "cas_ref" },
+      items: { type: "string" as const, format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/thread-read-xml-tags.test.ts b/packages/cli-workflow/src/__tests__/thread-read-xml-tags.test.ts
index f28f323..cfadb89 100644
--- a/packages/cli-workflow/src/__tests__/thread-read-xml-tags.test.ts
+++ b/packages/cli-workflow/src/__tests__/thread-read-xml-tags.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, ThreadId } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { cmdThreadRead, THREAD_READ_DEFAULT_QUOTA } from "../commands/thread.js";
@@ -42,7 +42,7 @@ const DETAIL_SCHEMA = {
     turnCount: { type: "integer" as const },
     turns: {
       type: "array" as const,
-      items: { type: "string" as const, format: "cas_ref" },
+      items: { type: "string" as const, format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/thread.test.ts b/packages/cli-workflow/src/__tests__/thread.test.ts
index d93b34b..00b1a16 100644
--- a/packages/cli-workflow/src/__tests__/thread.test.ts
+++ b/packages/cli-workflow/src/__tests__/thread.test.ts
@@ -1,8 +1,8 @@
 import { mkdir, mkdtemp, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { bootstrap, putSchema } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { bootstrap, putSchema } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, ThreadId } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { cmdStepList, cmdStepShow } from "../commands/step.js";
@@ -47,7 +47,7 @@ const DETAIL_SCHEMA = {
     turnCount: { type: "integer" as const },
     turns: {
       type: "array" as const,
-      items: { type: "string" as const, format: "cas_ref" },
+      items: { type: "string" as const, format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/cli-workflow/src/__tests__/workflow-resolution.test.ts b/packages/cli-workflow/src/__tests__/workflow-resolution.test.ts
index 664c265..52aa71c 100644
--- a/packages/cli-workflow/src/__tests__/workflow-resolution.test.ts
+++ b/packages/cli-workflow/src/__tests__/workflow-resolution.test.ts
@@ -1,7 +1,7 @@
 import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, WorkflowPayload } from "@uncaged/workflow-protocol";
 import { afterEach, beforeEach, describe, expect, test } from "vitest";
 import { stringify } from "yaml";
diff --git a/packages/cli-workflow/src/commands/cas.ts b/packages/cli-workflow/src/commands/cas.ts
index 8f9dbeb..689e64a 100644
--- a/packages/cli-workflow/src/commands/cas.ts
+++ b/packages/cli-workflow/src/commands/cas.ts
@@ -1,9 +1,9 @@
 import { readFileSync } from "node:fs";
 import { join } from "node:path";
 
-import type { JSONSchema, Store } from "@uncaged/json-cas";
-import { bootstrap, getSchema, putSchema, refs, walk } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import type { JSONSchema, Store } from "@ocas/core";
+import { bootstrap, getSchema, putSchema, refs, walk } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 
 import { TEXT_SCHEMA } from "../schemas.js";
 
@@ -85,13 +85,17 @@ export type SchemaListEntry = {
 
 export async function cmdCasSchemaList(storageRoot: string): Promise<SchemaListEntry[]> {
   const store = openStore(storageRoot);
-  const metaHash = await bootstrap(store);
+  const aliases = await bootstrap(store);
+  const metaHash = aliases["@ocas/schema"];
+  if (metaHash === undefined) {
+    throw new Error("Meta-schema not found in bootstrap result");
+  }
   const entries: SchemaListEntry[] = [];
 
   // Include meta-schema itself
   entries.push({ hash: metaHash, title: "(meta-schema)" });
 
-  for (const hash of store.listByType(metaHash)) {
+  for (const { hash } of store.listByType(metaHash)) {
     if (hash === metaHash) continue;
     const node = store.get(hash);
     if (node !== null) {
diff --git a/packages/cli-workflow/src/commands/shared.ts b/packages/cli-workflow/src/commands/shared.ts
index b01139c..fbb3df9 100644
--- a/packages/cli-workflow/src/commands/shared.ts
+++ b/packages/cli-workflow/src/commands/shared.ts
@@ -1,5 +1,5 @@
-import type { Store as CasStore, JSONSchema } from "@uncaged/json-cas";
-import { getSchema } from "@uncaged/json-cas";
+import type { Store as CasStore, JSONSchema } from "@ocas/core";
+import { getSchema } from "@ocas/core";
 import type {
   CasRef,
   StartNodePayload,
@@ -88,7 +88,7 @@ function expandOutput(uwf: UwfStore, outputRef: CasRef): unknown {
 }
 
 /**
- * Recursively expand all cas_ref fields in a CAS node's payload,
+ * Recursively expand all ocas_ref fields in a CAS node's payload,
  * replacing hash strings with the referenced node's expanded payload.
  */
 function expandDeep(store: CasStore, hash: CasRef, visited?: Set<string>): unknown {
@@ -120,7 +120,7 @@ function expandAnyOfField(
 ): unknown {
   if (!Array.isArray(schema.anyOf)) return value;
   for (const sub of schema.anyOf as JSONSchema[]) {
-    if (sub.format === "cas_ref" && typeof value === "string") {
+    if (sub.format === "ocas_ref" && typeof value === "string") {
       return expandDeep(store, value as CasRef, visited);
     }
   }
@@ -163,7 +163,7 @@ function expandValue(
   value: unknown,
   visited: Set<string>,
 ): unknown {
-  if (schema.format === "cas_ref") return expandCasRefField(store, value, visited);
+  if (schema.format === "ocas_ref") return expandCasRefField(store, value, visited);
   if (Array.isArray(schema.anyOf)) return expandAnyOfField(store, schema, value, visited);
   if (schema.type === "array") return expandArrayField(store, schema, value, visited);
   return expandObjectField(store, schema, value, visited);
diff --git a/packages/cli-workflow/src/commands/step.ts b/packages/cli-workflow/src/commands/step.ts
index c0c1ec5..e304c79 100644
--- a/packages/cli-workflow/src/commands/step.ts
+++ b/packages/cli-workflow/src/commands/step.ts
@@ -1,4 +1,4 @@
-import type { BootstrapCapableStore } from "@uncaged/json-cas";
+import type { BootstrapCapableStore } from "@ocas/core";
 import type {
   CasRef,
   StartEntry,
diff --git a/packages/cli-workflow/src/commands/thread.ts b/packages/cli-workflow/src/commands/thread.ts
index dad5e31..f738322 100644
--- a/packages/cli-workflow/src/commands/thread.ts
+++ b/packages/cli-workflow/src/commands/thread.ts
@@ -1,7 +1,7 @@
 import { execFileSync, spawn } from "node:child_process";
 import { access, readFile } from "node:fs/promises";
 import { dirname, isAbsolute, resolve as resolvePath } from "node:path";
-import { validate } from "@uncaged/json-cas";
+import { validate } from "@ocas/core";
 import type {
   AgentAlias,
   AgentConfig,
diff --git a/packages/cli-workflow/src/commands/workflow.ts b/packages/cli-workflow/src/commands/workflow.ts
index 8dc2b05..d6ae05b 100644
--- a/packages/cli-workflow/src/commands/workflow.ts
+++ b/packages/cli-workflow/src/commands/workflow.ts
@@ -1,8 +1,8 @@
 import { readFile } from "node:fs/promises";
 import { dirname, resolve as resolvePath } from "node:path";
 
-import type { JSONSchema } from "@uncaged/json-cas";
-import { putSchema, validate } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
+import { putSchema, validate } from "@ocas/core";
 import type { CasRef, RoleDefinition, Target, WorkflowPayload } from "@uncaged/workflow-protocol";
 import { parse } from "yaml";
 import { createIncludeTag } from "../include.js";
diff --git a/packages/cli-workflow/src/schemas.ts b/packages/cli-workflow/src/schemas.ts
index 530c2c0..ce126fb 100644
--- a/packages/cli-workflow/src/schemas.ts
+++ b/packages/cli-workflow/src/schemas.ts
@@ -1,5 +1,5 @@
-import type { Hash, Store } from "@uncaged/json-cas";
-import { putSchema } from "@uncaged/json-cas";
+import type { Hash, Store } from "@ocas/core";
+import { putSchema } from "@ocas/core";
 import { START_NODE_SCHEMA, STEP_NODE_SCHEMA, WORKFLOW_SCHEMA } from "@uncaged/workflow-protocol";
 
 export const TEXT_SCHEMA = { type: "string" as const };
diff --git a/packages/cli-workflow/src/store.ts b/packages/cli-workflow/src/store.ts
index f491f71..48cf232 100644
--- a/packages/cli-workflow/src/store.ts
+++ b/packages/cli-workflow/src/store.ts
@@ -3,8 +3,8 @@ import { access, appendFile, mkdir, readdir, readFile, writeFile } from "node:fs
 import { homedir } from "node:os";
 import { join } from "node:path";
 
-import type { BootstrapCapableStore, Hash } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import type { BootstrapCapableStore, Hash } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type { CasRef, ThreadId, ThreadListItem, ThreadsIndex } from "@uncaged/workflow-protocol";
 import { parse, stringify } from "yaml";
 
diff --git a/packages/workflow-agent-builtin/README.md b/packages/workflow-agent-builtin/README.md
index 4855310..52efdf6 100644
--- a/packages/workflow-agent-builtin/README.md
+++ b/packages/workflow-agent-builtin/README.md
@@ -8,7 +8,7 @@ Layer 3 agent implementation. Runs an OpenAI-compatible chat completion loop wit
 
 Useful when you want a self-contained agent without an external CLI like Hermes or Claude Code.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-util`
+**Dependencies:** `@ocas/core`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-util`
 
 ## Installation
 
diff --git a/packages/workflow-agent-builtin/package.json b/packages/workflow-agent-builtin/package.json
index 33a9db5..507ad12 100644
--- a/packages/workflow-agent-builtin/package.json
+++ b/packages/workflow-agent-builtin/package.json
@@ -23,7 +23,7 @@
     "test:ci": "vitest run"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
+    "@ocas/core": "^0.1.1",
     "@uncaged/workflow-util-agent": "workspace:^",
     "@uncaged/workflow-util": "workspace:^"
   },
diff --git a/packages/workflow-agent-builtin/src/agent.ts b/packages/workflow-agent-builtin/src/agent.ts
index ee6cb85..40be050 100644
--- a/packages/workflow-agent-builtin/src/agent.ts
+++ b/packages/workflow-agent-builtin/src/agent.ts
@@ -1,4 +1,4 @@
-import type { Store } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
 import { createLogger, generateUlid } from "@uncaged/workflow-util";
 import {
   type AgentContext,
diff --git a/packages/workflow-agent-builtin/src/detail.ts b/packages/workflow-agent-builtin/src/detail.ts
index 828fdcb..c1d887f 100644
--- a/packages/workflow-agent-builtin/src/detail.ts
+++ b/packages/workflow-agent-builtin/src/detail.ts
@@ -1,4 +1,4 @@
-import { bootstrap, putSchema, type Store } from "@uncaged/json-cas";
+import { bootstrap, putSchema, type Store } from "@ocas/core";
 
 import { BUILTIN_DETAIL_SCHEMA, BUILTIN_TURN_SCHEMA } from "./schemas.js";
 import { readSessionTurns } from "./session.js";
diff --git a/packages/workflow-agent-builtin/src/schemas.ts b/packages/workflow-agent-builtin/src/schemas.ts
index c9e8077..2505d40 100644
--- a/packages/workflow-agent-builtin/src/schemas.ts
+++ b/packages/workflow-agent-builtin/src/schemas.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 const BUILTIN_TOOL_CALL_SCHEMA: JSONSchema = {
   type: "object",
@@ -38,7 +38,7 @@ export const BUILTIN_DETAIL_SCHEMA: JSONSchema = {
     turnCount: { type: "integer" },
     turns: {
       type: "array",
-      items: { type: "string", format: "cas_ref" },
+      items: { type: "string", format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/workflow-agent-builtin/src/tools/types.ts b/packages/workflow-agent-builtin/src/tools/types.ts
index a96573b..b5de40e 100644
--- a/packages/workflow-agent-builtin/src/tools/types.ts
+++ b/packages/workflow-agent-builtin/src/tools/types.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 export type ToolContext = {
   cwd: string;
diff --git a/packages/workflow-agent-claude-code/README.md b/packages/workflow-agent-claude-code/README.md
index 09f84b9..4e6860f 100644
--- a/packages/workflow-agent-claude-code/README.md
+++ b/packages/workflow-agent-claude-code/README.md
@@ -6,7 +6,7 @@
 
 Layer 3 agent implementation. Spawns the `claude` CLI with a composed system prompt (role definition, task, prior steps, edge prompt). Parses stream or JSON stdout, caches session IDs for multi-turn continuation, and stores raw output plus structured detail in CAS.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/workflow-util-agent`
+**Dependencies:** `@ocas/core`, `@uncaged/workflow-util-agent`
 
 ## Installation
 
diff --git a/packages/workflow-agent-claude-code/__tests__/session-detail.test.ts b/packages/workflow-agent-claude-code/__tests__/session-detail.test.ts
index 03d1d2e..28c9bb0 100644
--- a/packages/workflow-agent-claude-code/__tests__/session-detail.test.ts
+++ b/packages/workflow-agent-claude-code/__tests__/session-detail.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, test } from "bun:test";
-import { createMemoryStore, walk } from "@uncaged/json-cas";
+import { createMemoryStore, walk } from "@ocas/core";
 import {
   parseClaudeCodeJsonOutput,
   parseClaudeCodeStreamOutput,
diff --git a/packages/workflow-agent-claude-code/package.json b/packages/workflow-agent-claude-code/package.json
index a585f78..8d3800a 100644
--- a/packages/workflow-agent-claude-code/package.json
+++ b/packages/workflow-agent-claude-code/package.json
@@ -23,7 +23,7 @@
     "test:ci": "vitest run"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
+    "@ocas/core": "^0.1.1",
     "@uncaged/workflow-util-agent": "workspace:^",
     "@uncaged/workflow-util": "workspace:^"
   },
diff --git a/packages/workflow-agent-claude-code/src/claude-code.ts b/packages/workflow-agent-claude-code/src/claude-code.ts
index 8996f46..bf22c22 100644
--- a/packages/workflow-agent-claude-code/src/claude-code.ts
+++ b/packages/workflow-agent-claude-code/src/claude-code.ts
@@ -1,5 +1,5 @@
 import { spawn } from "node:child_process";
-import type { Store } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
 import { createLogger } from "@uncaged/workflow-util";
 import {
   type AgentContext,
diff --git a/packages/workflow-agent-claude-code/src/schemas.ts b/packages/workflow-agent-claude-code/src/schemas.ts
index 9626249..d6efb10 100644
--- a/packages/workflow-agent-claude-code/src/schemas.ts
+++ b/packages/workflow-agent-claude-code/src/schemas.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 export const CLAUDE_CODE_DETAIL_SCHEMA: JSONSchema = {
   title: "claude-code-detail",
@@ -34,7 +34,7 @@ export const CLAUDE_CODE_DETAIL_SCHEMA: JSONSchema = {
     },
     turns: {
       type: "array",
-      items: { type: "string", format: "cas_ref" },
+      items: { type: "string", format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/workflow-agent-claude-code/src/session-detail.ts b/packages/workflow-agent-claude-code/src/session-detail.ts
index 0b0ea36..0854ecc 100644
--- a/packages/workflow-agent-claude-code/src/session-detail.ts
+++ b/packages/workflow-agent-claude-code/src/session-detail.ts
@@ -1,4 +1,4 @@
-import { bootstrap, putSchema, type Store } from "@uncaged/json-cas";
+import { bootstrap, putSchema, type Store } from "@ocas/core";
 
 import {
   CLAUDE_CODE_DETAIL_SCHEMA,
diff --git a/packages/workflow-agent-hermes/README.md b/packages/workflow-agent-hermes/README.md
index 3c6d445..61f0f57 100644
--- a/packages/workflow-agent-hermes/README.md
+++ b/packages/workflow-agent-hermes/README.md
@@ -8,7 +8,7 @@
 
 On first visit to a role it sends a composed prompt (role definition, task, history, edge prompt); on continuation it resumes the cached session. Session transcripts and raw output are stored as CAS detail nodes.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`
+**Dependencies:** `@ocas/core`, `@uncaged/workflow-util-agent`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`
 
 ## Installation
 
diff --git a/packages/workflow-agent-hermes/__tests__/session-detail.test.ts b/packages/workflow-agent-hermes/__tests__/session-detail.test.ts
index 0e6e603..5f0a293 100644
--- a/packages/workflow-agent-hermes/__tests__/session-detail.test.ts
+++ b/packages/workflow-agent-hermes/__tests__/session-detail.test.ts
@@ -3,7 +3,7 @@ import { describe, expect, test } from "bun:test";
 import { mkdtemp, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { createMemoryStore, refs, validate, walk } from "@uncaged/json-cas";
+import { createMemoryStore, refs, validate, walk } from "@ocas/core";
 
 import {
   computeDurationMs,
@@ -82,7 +82,7 @@ describe("computeDurationMs", () => {
 });
 
 describe("storeHermesSessionDetail", () => {
-  test("stores hermes-detail root with cas_ref turns walkable", async () => {
+  test("stores hermes-detail root with ocas_ref turns walkable", async () => {
     const session: HermesSessionJson = {
       session_id: "20260518_133159_6a84e8",
       model: "claude-opus-4.6",
diff --git a/packages/workflow-agent-hermes/package.json b/packages/workflow-agent-hermes/package.json
index 5af99bf..1b70c7e 100644
--- a/packages/workflow-agent-hermes/package.json
+++ b/packages/workflow-agent-hermes/package.json
@@ -23,7 +23,7 @@
     "test:ci": "vitest run"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
+    "@ocas/core": "^0.1.1",
     "@uncaged/workflow-util-agent": "workspace:^",
     "@uncaged/workflow-protocol": "workspace:^",
     "@uncaged/workflow-util": "workspace:^"
diff --git a/packages/workflow-agent-hermes/src/hermes.ts b/packages/workflow-agent-hermes/src/hermes.ts
index 77427eb..2dc2328 100644
--- a/packages/workflow-agent-hermes/src/hermes.ts
+++ b/packages/workflow-agent-hermes/src/hermes.ts
@@ -1,4 +1,4 @@
-import type { Store } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
 import { createLogger } from "@uncaged/workflow-util";
 import {
   type AgentContext,
diff --git a/packages/workflow-agent-hermes/src/schemas.ts b/packages/workflow-agent-hermes/src/schemas.ts
index 6d62183..41f0838 100644
--- a/packages/workflow-agent-hermes/src/schemas.ts
+++ b/packages/workflow-agent-hermes/src/schemas.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 const HERMES_TOOL_CALL_SCHEMA: JSONSchema = {
   type: "object",
@@ -39,7 +39,7 @@ export const HERMES_DETAIL_SCHEMA: JSONSchema = {
     turnCount: { type: "integer" },
     turns: {
       type: "array",
-      items: { type: "string", format: "cas_ref" },
+      items: { type: "string", format: "ocas_ref" },
     },
   },
   additionalProperties: false,
diff --git a/packages/workflow-agent-hermes/src/session-detail.ts b/packages/workflow-agent-hermes/src/session-detail.ts
index 87e9928..28b3ba0 100644
--- a/packages/workflow-agent-hermes/src/session-detail.ts
+++ b/packages/workflow-agent-hermes/src/session-detail.ts
@@ -3,7 +3,7 @@ import { readFile } from "node:fs/promises";
 import { homedir } from "node:os";
 import { join } from "node:path";
 
-import { bootstrap, putSchema, type Store } from "@uncaged/json-cas";
+import { bootstrap, putSchema, type Store } from "@ocas/core";
 
 import { HERMES_DETAIL_SCHEMA, HERMES_RAW_OUTPUT_SCHEMA, HERMES_TURN_SCHEMA } from "./schemas.js";
 import type {
diff --git a/packages/workflow-protocol/README.md b/packages/workflow-protocol/README.md
index 3f0644f..627da27 100644
--- a/packages/workflow-protocol/README.md
+++ b/packages/workflow-protocol/README.md
@@ -4,9 +4,9 @@ Shared TypeScript types and JSON Schema constants for the workflow engine.
 
 ## Overview
 
-This is the contract layer (Layer 0). It defines `WorkflowPayload`, thread node payloads, moderator context, CLI output shapes, and configuration types used across every other package. It has no runtime logic beyond exporting schema objects from `@uncaged/json-cas`.
+This is the contract layer (Layer 0). It defines `WorkflowPayload`, thread node payloads, moderator context, CLI output shapes, and configuration types used across every other package. It has no runtime logic beyond exporting schema objects from `@ocas/core`.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/json-cas-fs`
+**Dependencies:** `@ocas/core`, `@ocas/fs`
 
 ## Installation
 
diff --git a/packages/workflow-protocol/package.json b/packages/workflow-protocol/package.json
index 2b957d7..df703e0 100644
--- a/packages/workflow-protocol/package.json
+++ b/packages/workflow-protocol/package.json
@@ -20,8 +20,8 @@
     "test:ci": "vitest run"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
-    "@uncaged/json-cas-fs": "^0.5.3"
+    "@ocas/core": "^0.1.1",
+    "@ocas/fs": "^0.1.1"
   },
   "devDependencies": {
     "typescript": "^5.8.3"
diff --git a/packages/workflow-protocol/src/schemas.ts b/packages/workflow-protocol/src/schemas.ts
index 8144187..81d062b 100644
--- a/packages/workflow-protocol/src/schemas.ts
+++ b/packages/workflow-protocol/src/schemas.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 const ROLE_DEFINITION: JSONSchema = {
   type: "object",
@@ -9,7 +9,7 @@ const ROLE_DEFINITION: JSONSchema = {
     capabilities: { type: "array", items: { type: "string" } },
     procedure: { type: "string" },
     output: { type: "string" },
-    frontmatter: { type: "string", format: "cas_ref" },
+    frontmatter: { type: "string", format: "ocas_ref" },
   },
   additionalProperties: false,
 };
@@ -54,7 +54,7 @@ export const START_NODE_SCHEMA: JSONSchema = {
   type: "object",
   required: ["workflow", "prompt", "cwd"],
   properties: {
-    workflow: { type: "string", format: "cas_ref" },
+    workflow: { type: "string", format: "ocas_ref" },
     prompt: { type: "string" },
     cwd: { type: "string" },
   },
@@ -76,20 +76,20 @@ export const STEP_NODE_SCHEMA: JSONSchema = {
     "cwd",
   ],
   properties: {
-    start: { type: "string", format: "cas_ref" },
+    start: { type: "string", format: "ocas_ref" },
     prev: {
-      anyOf: [{ type: "string", format: "cas_ref" }, { type: "null" }],
+      anyOf: [{ type: "string", format: "ocas_ref" }, { type: "null" }],
     },
     role: { type: "string" },
-    output: { type: "string", format: "cas_ref" },
-    detail: { type: "string", format: "cas_ref" },
+    output: { type: "string", format: "ocas_ref" },
+    detail: { type: "string", format: "ocas_ref" },
     agent: { type: "string" },
     edgePrompt: { type: "string" },
     startedAtMs: { type: "integer" },
     completedAtMs: { type: "integer" },
     cwd: { type: "string" },
     assembledPrompt: {
-      anyOf: [{ type: "string", format: "cas_ref" }, { type: "null" }],
+      anyOf: [{ type: "string", format: "ocas_ref" }, { type: "null" }],
     },
   },
   additionalProperties: false,
diff --git a/packages/workflow-util-agent/README.md b/packages/workflow-util-agent/README.md
index a1b75f1..47eeefd 100644
--- a/packages/workflow-util-agent/README.md
+++ b/packages/workflow-util-agent/README.md
@@ -8,7 +8,7 @@ Layer 2 agent framework. Provides the standard entrypoint for all agent CLIs: pa
 
 Also exports prompt builders, config/storage helpers, and session ID caching for multi-turn agents.
 
-**Dependencies:** `@uncaged/json-cas`, `@uncaged/json-cas-fs`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`, `dotenv`, `yaml`
+**Dependencies:** `@ocas/core`, `@ocas/fs`, `@uncaged/workflow-protocol`, `@uncaged/workflow-util`, `dotenv`, `yaml`
 
 ## Installation
 
diff --git a/packages/workflow-util-agent/__tests__/adapter-retry.test.ts b/packages/workflow-util-agent/__tests__/adapter-retry.test.ts
index aa9e1e7..079ac2b 100644
--- a/packages/workflow-util-agent/__tests__/adapter-retry.test.ts
+++ b/packages/workflow-util-agent/__tests__/adapter-retry.test.ts
@@ -1,4 +1,4 @@
-import { createMemoryStore, putSchema } from "@uncaged/json-cas";
+import { createMemoryStore, putSchema } from "@ocas/core";
 import { describe, expect, test } from "vitest";
 
 import { tryFrontmatterFastPath } from "../src/frontmatter.js";
diff --git a/packages/workflow-util-agent/__tests__/adapter-stdout.test.ts b/packages/workflow-util-agent/__tests__/adapter-stdout.test.ts
index a724c98..c150032 100644
--- a/packages/workflow-util-agent/__tests__/adapter-stdout.test.ts
+++ b/packages/workflow-util-agent/__tests__/adapter-stdout.test.ts
@@ -1,4 +1,4 @@
-import { createMemoryStore, putSchema } from "@uncaged/json-cas";
+import { createMemoryStore, putSchema } from "@ocas/core";
 import { describe, expect, test } from "vitest";
 
 import { tryFrontmatterFastPath } from "../src/frontmatter.js";
diff --git a/packages/workflow-util-agent/__tests__/frontmatter-fast-path.test.ts b/packages/workflow-util-agent/__tests__/frontmatter-fast-path.test.ts
index c42f1dc..f17d646 100644
--- a/packages/workflow-util-agent/__tests__/frontmatter-fast-path.test.ts
+++ b/packages/workflow-util-agent/__tests__/frontmatter-fast-path.test.ts
@@ -1,4 +1,4 @@
-import { createMemoryStore, putSchema } from "@uncaged/json-cas";
+import { createMemoryStore, putSchema } from "@ocas/core";
 import { describe, expect, test } from "vitest";
 
 import { tryFrontmatterFastPath } from "../src/frontmatter.js";
diff --git a/packages/workflow-util-agent/package.json b/packages/workflow-util-agent/package.json
index 4c8f29b..b041c53 100644
--- a/packages/workflow-util-agent/package.json
+++ b/packages/workflow-util-agent/package.json
@@ -20,8 +20,8 @@
     "test:ci": "vitest run"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
-    "@uncaged/json-cas-fs": "^0.5.3",
+    "@ocas/core": "^0.1.1",
+    "@ocas/fs": "^0.1.1",
     "@uncaged/workflow-protocol": "workspace:^",
     "@uncaged/workflow-util": "workspace:^",
     "dotenv": "^16.6.1",
diff --git a/packages/workflow-util-agent/src/build-output-format-instruction.ts b/packages/workflow-util-agent/src/build-output-format-instruction.ts
index 8db5c7b..2df7e73 100644
--- a/packages/workflow-util-agent/src/build-output-format-instruction.ts
+++ b/packages/workflow-util-agent/src/build-output-format-instruction.ts
@@ -1,4 +1,4 @@
-import type { JSONSchema } from "@uncaged/json-cas";
+import type { JSONSchema } from "@ocas/core";
 
 type SchemaProperty = {
   name: string;
diff --git a/packages/workflow-util-agent/src/context.ts b/packages/workflow-util-agent/src/context.ts
index 3631760..462665a 100644
--- a/packages/workflow-util-agent/src/context.ts
+++ b/packages/workflow-util-agent/src/context.ts
@@ -1,4 +1,4 @@
-import type { Store } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
 import type {
   CasRef,
   StartNodePayload,
diff --git a/packages/workflow-util-agent/src/extract.ts b/packages/workflow-util-agent/src/extract.ts
index 64807d2..0a4258d 100644
--- a/packages/workflow-util-agent/src/extract.ts
+++ b/packages/workflow-util-agent/src/extract.ts
@@ -1,4 +1,4 @@
-import { getSchema, validate } from "@uncaged/json-cas";
+import { getSchema, validate } from "@ocas/core";
 
 import type { CasRef, ModelAlias, WorkflowConfig } from "@uncaged/workflow-protocol";
 import { createAgentStore, resolveStorageRoot } from "./storage.js";
diff --git a/packages/workflow-util-agent/src/frontmatter.ts b/packages/workflow-util-agent/src/frontmatter.ts
index 5000b33..4574137 100644
--- a/packages/workflow-util-agent/src/frontmatter.ts
+++ b/packages/workflow-util-agent/src/frontmatter.ts
@@ -1,5 +1,5 @@
-import type { Store } from "@uncaged/json-cas";
-import { getSchema, validate } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
+import { getSchema, validate } from "@ocas/core";
 import type { CasRef } from "@uncaged/workflow-protocol";
 import {
   type AgentFrontmatter,
diff --git a/packages/workflow-util-agent/src/run.ts b/packages/workflow-util-agent/src/run.ts
index e2ccee7..28d5936 100644
--- a/packages/workflow-util-agent/src/run.ts
+++ b/packages/workflow-util-agent/src/run.ts
@@ -1,4 +1,4 @@
-import { getSchema, validate } from "@uncaged/json-cas";
+import { getSchema, validate } from "@ocas/core";
 import type { CasRef, StepNodePayload, ThreadId } from "@uncaged/workflow-protocol";
 import { config as loadDotenv } from "dotenv";
 import { buildOutputFormatInstruction } from "./build-output-format-instruction.js";
diff --git a/packages/workflow-util-agent/src/schemas.ts b/packages/workflow-util-agent/src/schemas.ts
index 77c5f54..8a36956 100644
--- a/packages/workflow-util-agent/src/schemas.ts
+++ b/packages/workflow-util-agent/src/schemas.ts
@@ -1,5 +1,5 @@
-import type { Hash, Store } from "@uncaged/json-cas";
-import { putSchema } from "@uncaged/json-cas";
+import type { Hash, Store } from "@ocas/core";
+import { putSchema } from "@ocas/core";
 import { START_NODE_SCHEMA, STEP_NODE_SCHEMA, WORKFLOW_SCHEMA } from "@uncaged/workflow-protocol";
 
 export type UwfAgentSchemaHashes = {
diff --git a/packages/workflow-util-agent/src/storage.ts b/packages/workflow-util-agent/src/storage.ts
index 7d94a40..573d632 100644
--- a/packages/workflow-util-agent/src/storage.ts
+++ b/packages/workflow-util-agent/src/storage.ts
@@ -2,8 +2,8 @@ import { readFile } from "node:fs/promises";
 import { homedir } from "node:os";
 import { join } from "node:path";
 
-import type { Store } from "@uncaged/json-cas";
-import { createFsStore } from "@uncaged/json-cas-fs";
+import type { Store } from "@ocas/core";
+import { createFsStore } from "@ocas/fs";
 import type {
   AgentAlias,
   AgentConfig,
diff --git a/packages/workflow-util-agent/src/types.ts b/packages/workflow-util-agent/src/types.ts
index bdd43c2..6cd54d6 100644
--- a/packages/workflow-util-agent/src/types.ts
+++ b/packages/workflow-util-agent/src/types.ts
@@ -1,4 +1,4 @@
-import type { Store } from "@uncaged/json-cas";
+import type { Store } from "@ocas/core";
 import type { ModeratorContext, ThreadId, WorkflowPayload } from "@uncaged/workflow-protocol";
 
 export type AgentContext = ModeratorContext & {
diff --git a/packages/workflow-util/src/developer-reference.ts b/packages/workflow-util/src/developer-reference.ts
index f8447c5..0fca04f 100644
--- a/packages/workflow-util/src/developer-reference.ts
+++ b/packages/workflow-util/src/developer-reference.ts
@@ -20,7 +20,7 @@ Dependency layers (each only imports from packages above it):
 protocol → util → util-agent → agent-hermes / agent-builtin / cli-workflow
 \`\`\`
 
-External CAS: \`@uncaged/json-cas\` (store API, hashing, schema validation) + \`@uncaged/json-cas-fs\` (filesystem backend).
+External CAS: \`@ocas/core\` (store API, hashing, schema validation) + \`@ocas/fs\` (filesystem backend).
 
 ## Coding Conventions
 
@@ -122,7 +122,7 @@ Shared entry point for all agent CLIs. Handles:
 
 ### CAS Integration
 
-All data is CAS-addressed via \`@uncaged/json-cas\`:
+All data is CAS-addressed via \`@ocas/core\`:
 - \`store.put(schemaHash, data)\` → content hash
 - \`store.get(hash)\` → node
 - \`validate(store, node)\` → schema check
diff --git a/scripts/mock-agent.ts b/scripts/mock-agent.ts
index bc4cb32..e66fdc0 100644
--- a/scripts/mock-agent.ts
+++ b/scripts/mock-agent.ts
@@ -1,6 +1,6 @@
 #!/usr/bin/env bun
 // Mock agent for smoke testing
-import { bootstrap, type JSONSchema, putSchema } from "@uncaged/json-cas";
+import { bootstrap, type JSONSchema, putSchema } from "@ocas/core";
 import { createAgent } from "../packages/uwf-agent-kit/src/index.js";
 
 const MOCK_RAW_OUTPUT_SCHEMA: JSONSchema = {