docs: update all docs to reference @ocas/core and ocas_ref

- README.md, docs/architecture.md, docs/wf-stateless-design.md
- docs/builtin-agent-research.md
- All package README.md files
- cas_ref → ocas_ref, @uncaged/json-cas → @ocas/core, json-cas-fs → @ocas/fs

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
 

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
 

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
 

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
 

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
 

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