feat: put/hash support --pipe/-p to read JSON from stdin (#83)

CLI 'ucas put @schema' now detects meta-schema target and routes
through putSchema() which uses isValidSchema() — a proper recursive
validator — instead of ajv against the meta-schema (which cannot
express recursive constraints for nested property sub-schemas).

This fixes the core issue where schemas with typed properties like
{"type":"string","minLength":1} were rejected by the CLI path.

Added CLI E2E test: put @schema with nested constraints (minLength,
maximum, uniqueItems).

494 tests, 0 fail.

Refs #82

README.md

@@ -88,30 +88,60 @@ Or use the CLI (see [CLI Reference](#cli-reference) and [`packages/cli-json-cas/
 
 ## CLI Reference
 
-Binary: `json-cas` (from `@uncaged/cli-json-cas`). Default store: `~/.uncaged/json-cas`.
+Binary: `json-cas` (also aliased `ucas`, from `@uncaged/cli-json-cas`). Default store:
+`~/.uncaged/json-cas`. The store is auto-created and bootstrapped on first use — there is
+no `init`/`bootstrap` command, and schemas are ordinary `@schema`-typed nodes (`ucas put
+@schema file.json`), so there is no `schema` subcommand.
+
+### Envelope format
+
+Every JSON-emitting command prints a uniform `{ type, value }` envelope. `type` is the hash
+of the command's `@output/*` result schema and `value` is the command payload. This makes
+output self-describing and pipeable: feed any envelope into `render -p` to render its
+`value` (embedded `cas_ref` hashes are expanded). `render` is the only command that emits
+raw (non-envelope) text.
+
+```jsonc
+// ucas has <hash>
+{ "type": "AYHQD2YA9G667", "value": true }
+```
 
 ```
 Usage: json-cas [--store <path>] [--json] <command> [args]
 
-Commands:
-  init                              Create store dir and write bootstrap seed
-  bootstrap                         Write meta-schema seed, print hash
-  schema put <file.json>            Register schema, print type hash
-  schema get <type-hash>            Print schema JSON
-  schema list                       List all schemas (name + hash)
-  schema validate <hash>            Validate node against its schema
-  put <type-hash> <file.json>       Store node, print hash
-  get <hash>                        Print node as JSON
-  has <hash>                        Print true/false
-  verify <hash>                     Verify integrity, print ok/corrupted
-  refs <hash>                       List direct cas_ref edges
-  walk <hash> [--format tree]       Recursive traversal
-  hash <type-hash> <file.json>      Compute hash without storing (dry run)
-  cat <hash> [--payload]            Output node (--payload for payload only)
+Commands (all emit a { type, value } envelope unless noted):
+  put <type-hash> <file.json>       Store node (value = hash)          (@output/put)
+  get <hash>                        Node payload + metadata            (@output/get)
+  has <hash>                        Existence boolean                  (@output/has)
+  verify <hash>                     ok / corrupted / invalid           (@output/verify)
+  refs <hash>                       Direct cas_ref edges               (@output/refs)
+  walk <hash> [--format tree]       Recursive traversal                (@output/walk)
+  hash <type-hash> <file.json>      Compute hash without storing       (@output/hash)
+  render <hash> [options]           Render node as text (raw output)
+  render --pipe/-p [options]        Render a piped envelope (raw output)
+  list --type <hash-or-alias>       Hashes for a type (value = list)   (@output/list)
+  var set|get|delete|tag|list ...   Variable CRUD                      (@output/var-*)
+  template set|get|list|delete ...  Output-template CRUD               (@output/template-*)
+  gc                                Garbage collection                 (@output/gc)
 
 Flags:
   --store <path>   Store directory (default: ~/.uncaged/json-cas)
   --json           Compact JSON output
+  --pipe, -p       Read a { type, value } envelope from stdin for render
+```
+
+### Pipe examples
+
+```bash
+# Store a node, then render the stored content (the put envelope's hash is
+# a cas_ref, so render -p dereferences and renders it):
+ucas put @schema ./schemas/item.json | ucas render -p
+
+# Render garbage-collection stats:
+ucas gc | ucas render -p
+
+# List every schema, then consume the envelope's value array with jq:
+ucas list --type @schema | jq -r '.value[]'
 ```
 
 ## Development

packages/cli-json-cas/CHANGELOG.md

@@ -1,5 +1,33 @@
 # @uncaged/cli-json-cas
 
+## 0.6.0
+
+### Minor Changes
+
+- Unified `{ type, value }` envelope output for all CLI commands (RFC [#67](https://github.com/uncaged/json-cas/issues/67)).
+
+  ### Breaking Changes
+
+  - Removed `init`, `bootstrap`, `cat`, `schema put/get/list/validate` commands
+  - All CLI command outputs now wrapped in `{ type, value }` envelope (except `render`)
+  - `openStore()` is now async and auto-bootstraps
+
+  ### New Features
+
+  - 18 `@output/*` schemas registered at bootstrap
+  - `list --type <hash-or-alias>` command (replaces `schema list`)
+  - `verify` now checks both hash integrity and schema validation
+  - `wrapEnvelope()` helper exported from `@uncaged/json-cas`
+  - `openStore()` in `@uncaged/json-cas-fs` — async, auto mkdir + bootstrap
+  - Default LiquidJS templates for all output schemas
+  - Pipe composition: any command output can be piped to `render -p`
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @uncaged/json-cas@0.6.0
+  - @uncaged/json-cas-fs@0.6.0
+
 ## 0.5.3
 
 ### Patch Changes

packages/cli-json-cas/README.md

@@ -4,7 +4,9 @@ CLI tool for json-cas stores.
 
 ## Overview
 
-`@uncaged/cli-json-cas` provides the `json-cas` command for managing a filesystem-backed store: bootstrap, schema registration, node CRUD, integrity checks, reference listing, and graph walks. It uses `@uncaged/json-cas-fs` for persistence and `@uncaged/json-cas` for core operations.
+`@uncaged/cli-json-cas` provides the `json-cas` command (also aliased `ucas`) for managing a filesystem-backed store: node CRUD, integrity checks, reference listing, graph walks, variables, and output templates. It uses `@uncaged/json-cas-fs` for persistence and `@uncaged/json-cas` for core operations.
+
+The store is **auto-created and bootstrapped** on first use, so there is no `init`/`bootstrap` command. Schemas are ordinary `@schema`-typed nodes — register one with `ucas put @schema file.json` and list them with `ucas list --type @schema`; there is no dedicated `schema` subcommand.
 
 **Dependencies:** `@uncaged/json-cas`, `@uncaged/json-cas-fs`
 
@@ -37,48 +39,95 @@ Usage: json-cas [--store <path>] [--json] <command> [args]
 | Flag | Description |
 |------|-------------|
 | `--store <path>` | Store directory (default: `~/.uncaged/json-cas`) |
-| `--json` | Compact JSON output for commands that print JSON |
+| `--var-db <path>` | Variable database path (default: `<store>/variables.db`) |
+| `--json` | Compact (single-line) JSON output |
+
+### Envelope format
+
+Every JSON-emitting command prints a uniform `{ type, value }` envelope. `type` is the hash
+of the command's `@output/*` result schema and `value` is the command payload. The output
+is therefore self-describing and pipeable: feed any envelope into `render -p` to render its
+`value` (embedded `cas_ref` hashes are expanded). `render` is the only command that emits
+raw, non-envelope text.
+
+```jsonc
+// json-cas has <hash>
+{ "type": "AYHQD2YA9G667", "value": true }
+
+// json-cas template set <schema-hash> --inline "Hi {{ payload.name }}"
+{ "type": "9YJZ09DDAYAWR", "value": { "schemaHash": "7XX5H51CVD9H0", "contentHash": "FC8WACA792B6F" } }
+```
 
 ### Commands
 
-| Command | Description |
-|---------|-------------|
-| `init` | Create store directory and write bootstrap seed; prints meta hash |
-| `bootstrap` | Write meta-schema seed into existing store; prints hash |
-| `schema put <file.json>` | Register schema from file; prints type hash |
-| `schema get <type-hash>` | Print schema JSON |
-| `schema list` | List all schemas (`hash  name`) |
-| `schema validate <hash>` | Validate node against its schema; prints `valid` / `invalid` |
-| `put <type-hash> <file.json>` | Store node; prints content hash |
-| `get <hash>` | Print full node as JSON |
-| `has <hash>` | Print `true` or `false` |
-| `verify <hash>` | Verify integrity; prints `ok` or `corrupted` |
-| `refs <hash>` | Print direct `cas_ref` targets (one per line) |
-| `walk <hash>` | BFS traversal; one hash per line |
-| `walk <hash> --format tree` | Tree-formatted traversal |
-| `hash <type-hash> <file.json>` | Compute hash without storing |
-| `cat <hash>` | Print node JSON |
-| `cat <hash> --payload` | Print payload only |
+| Command | Envelope `value` | Result schema |
+|---------|------------------|---------------|
+| `put <type-hash> <file.json>` | stored node hash (string) | `@output/put` |
+| `get <hash>` | `{ type, payload, timestamp }` | `@output/get` |
+| `has <hash>` | boolean | `@output/has` |
+| `verify <hash>` | `ok` / `corrupted` / `invalid` | `@output/verify` |
+| `refs <hash>` | hashes (string[]) | `@output/refs` |
+| `walk <hash> [--format tree]` | hashes (string[]) or tree string | `@output/walk` |
+| `hash <type-hash> <file.json>` | computed hash (string) | `@output/hash` |
+| `render <hash> [options]` | raw text (no envelope) | — |
+| `render --pipe/-p [options]` | raw text from piped envelope | — |
+| `list --type <hash-or-alias>` | hashes (string[]) | `@output/list` |
+| `var set <name> <hash> [--tag ...]` | variable object | `@output/var-set` |
+| `var get <name> --schema <hash>` | variable object | `@output/var-get` |
+| `var delete <name> [--schema <hash>]` | variable or variable[] | `@output/var-delete` |
+| `var tag <name> --schema <hash> <ops...>` | variable object | `@output/var-tag` |
+| `var list [prefix] [--schema <hash>] [--tag ...]` | variable[] | `@output/var-list` |
+| `template set <schema-hash> <file> \| --inline <text>` | `{ schemaHash, contentHash }` | `@output/template-set` |
+| `template get <schema-hash>` | template content (string) | `@output/template-get` |
+| `template list` | `{ schemaHash, contentHash }[]` | `@output/template-list` |
+| `template delete <schema-hash>` | `{ deleted: boolean }` | `@output/template-delete` |
+| `gc` | `{ total, reachable, collected, scanned }` | `@output/gc` |
 
 ### Examples
 
 ```bash
-# Initialize default store at ~/.uncaged/json-cas
-json-cas init
+# Register a schema (schemas are plain @schema nodes) and store a payload
+json-cas put @schema ./schemas/item.json
+# → { "type": "...", "value": "0123456789ABC" }  (the schema's type hash)
 
-# Use a custom store path
-json-cas --store ./data/cas bootstrap
-
-# Register a schema and store a payload
-json-cas schema put ./schemas/item.json
-# → prints type hash, e.g. 0123456789ABCD
-
-json-cas put 0123456789ABCD ./payloads/item.json
-# → prints content hash
+json-cas put 0123456789ABC ./payloads/item.json
+# → { "type": "...", "value": "<content-hash>" }
 
 json-cas get <content-hash> --json
 json-cas verify <content-hash>
 json-cas walk <content-hash> --format tree
+
+# List every registered schema, then extract the hashes with jq
+json-cas list --type @schema | jq -r '.value[]'
+```
+
+### Pipe composition
+
+Because every command shares the `{ type, value }` envelope, output composes directly into
+`render -p`:
+
+```bash
+# put emits a cas_ref hash envelope; render -p dereferences and renders the node
+json-cas put @schema ./schemas/item.json | json-cas render -p
+
+# render gc statistics
+json-cas gc | json-cas render -p
+
+# render every schema referenced by a list result
+json-cas list --type @schema | json-cas render -p
+```
+
+### Templates
+
+`template` commands manage the LiquidJS template bound to a schema (stored as a
+`@ucas/template/text/<schema-hash>` variable). `render <hash>` uses the template registered
+for the node's type, falling back to YAML when none exists.
+
+```bash
+# Bind a template to a schema, then render a node of that type
+json-cas template set 0123456789ABC --inline "Item: {{ payload.name }}"
+json-cas render <content-hash>
+# → Item: Widget
 ```
 
 ## Internal Structure

packages/cli-json-cas/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uncaged/cli-json-cas",
-  "version": "0.5.3",
+  "version": "0.6.0",
   "type": "module",
   "bin": {
     "json-cas": "./src/index.ts",
@@ -8,10 +8,10 @@
   },
   "scripts": {
     "test": "bun test",
-    "prepublishOnly": "echo '请用 bun run release 从根目录发版' && exit 1"
+    "prepublishOnly": "bash ../../scripts/check-workspace-deps.sh"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
-    "@uncaged/json-cas-fs": "^0.5.3"
+    "@uncaged/json-cas": "^0.6.0",
+    "@uncaged/json-cas-fs": "^0.6.0"
   }
 }

packages/cli-json-cas/src/__snapshots__/e2e.test.ts.snap

@@ -2,58 +2,78 @@
 
 exports[`Phase 1: CAS Core 1.6 get returns node JSON (snapshot) 1`] = `
 {
-  "payload": {
-    "age": 30,
-    "name": "Alice",
+  "type": "2NHHHE9NR0FVT",
+  "value": {
+    "payload": {
+      "age": 30,
+      "name": "Alice",
+    },
+    "type": "3K9ETAPGFPE32",
   },
-  "type": "7XX5H51CVD9H0",
 }
 `;
 
-exports[`Phase 1: CAS Core 1.9 verify returns ok for valid node 1`] = `"ok"`;
+exports[`Phase 1: CAS Core 1.9 verify returns ok for valid node 1`] = `
+{
+  "type": "BZ3TV0PTATA52",
+  "value": "ok",
+}
+`;
 
-exports[`Phase 1: CAS Core 1.10 refs lists direct references (snapshot) 1`] = `""`;
+exports[`Phase 1: CAS Core 1.10 refs lists direct references (snapshot) 1`] = `
+"{
+  "type": "18HZGJY02WN1K",
+  "value": []
+}"
+`;
 
-exports[`Phase 1: CAS Core 1.11 walk shows traversal tree (snapshot) 1`] = `"ERARPP19YJT05"`;
+exports[`Phase 1: CAS Core 1.11 walk shows traversal tree (snapshot) 1`] = `
+"{
+  "type": "9BVX9SHACFC5J",
+  "value": [
+    "A0QKG4ERMXSFG"
+  ]
+}"
+`;
 
 exports[`Phase 2: Schema Validation 2.3 put against non-existent schema hash fails 1`] = `"Schema not found: AAAAAAAAAAAAA"`;
 
 exports[`Phase 3: Variable System 3.1 var set creates variable 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "EMX6HW4CECBGK",
   "value": {
     "labels": [],
     "name": "myapp/config",
-    "schema": "7XX5H51CVD9H0",
+    "schema": "3K9ETAPGFPE32",
     "tags": {},
-    "value": "ERARPP19YJT05",
+    "value": "A0QKG4ERMXSFG",
   },
 }
 `;
 
 exports[`Phase 3: Variable System 3.2 var get returns variable 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "F68GWJAT9H6HP",
   "value": {
     "labels": [],
     "name": "myapp/config",
-    "schema": "7XX5H51CVD9H0",
+    "schema": "3K9ETAPGFPE32",
     "tags": {},
-    "value": "ERARPP19YJT05",
+    "value": "A0QKG4ERMXSFG",
   },
 }
 `;
 
 exports[`Phase 3: Variable System 3.3 var list shows all variables 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "A4TV1FVBBNG5M",
   "value": [
     {
       "labels": [],
       "name": "myapp/config",
-      "schema": "7XX5H51CVD9H0",
+      "schema": "3K9ETAPGFPE32",
       "tags": {},
-      "value": "ERARPP19YJT05",
+      "value": "A0QKG4ERMXSFG",
     },
   ],
 }
@@ -61,14 +81,14 @@ exports[`Phase 3: Variable System 3.3 var list shows all variables 1`] = `
 
 exports[`Phase 3: Variable System 3.4 var list prefix filters by prefix 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "A4TV1FVBBNG5M",
   "value": [
     {
       "labels": [],
       "name": "myapp/config",
-      "schema": "7XX5H51CVD9H0",
+      "schema": "3K9ETAPGFPE32",
       "tags": {},
-      "value": "ERARPP19YJT05",
+      "value": "A0QKG4ERMXSFG",
     },
   ],
 }
@@ -76,48 +96,48 @@ exports[`Phase 3: Variable System 3.4 var list prefix filters by prefix 1`] = `
 
 exports[`Phase 3: Variable System 3.5 var set upsert updates existing variable 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "EMX6HW4CECBGK",
   "value": {
     "labels": [],
     "name": "myapp/config",
-    "schema": "7XX5H51CVD9H0",
+    "schema": "3K9ETAPGFPE32",
     "tags": {},
-    "value": "F68P1BZ46YDXM",
+    "value": "FNDM9C6P23238",
   },
 }
 `;
 
 exports[`Phase 3: Variable System 3.6 var tag adds kv tag and label 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "92JS8RXGKDKC2",
   "value": {
     "labels": [
       "important",
     ],
     "name": "myapp/config",
-    "schema": "7XX5H51CVD9H0",
+    "schema": "3K9ETAPGFPE32",
     "tags": {
       "env": "prod",
     },
-    "value": "ERARPP19YJT05",
+    "value": "A0QKG4ERMXSFG",
   },
 }
 `;
 
 exports[`Phase 3: Variable System 3.7 var list --tag env:prod filters by kv tag 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "A4TV1FVBBNG5M",
   "value": [
     {
       "labels": [
         "important",
       ],
       "name": "myapp/config",
-      "schema": "7XX5H51CVD9H0",
+      "schema": "3K9ETAPGFPE32",
       "tags": {
         "env": "prod",
       },
-      "value": "ERARPP19YJT05",
+      "value": "A0QKG4ERMXSFG",
     },
   ],
 }
@@ -125,18 +145,18 @@ exports[`Phase 3: Variable System 3.7 var list --tag env:prod filters by kv tag
 
 exports[`Phase 3: Variable System 3.8 var list --tag important filters by label 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "A4TV1FVBBNG5M",
   "value": [
     {
       "labels": [
         "important",
       ],
       "name": "myapp/config",
-      "schema": "7XX5H51CVD9H0",
+      "schema": "3K9ETAPGFPE32",
       "tags": {
         "env": "prod",
       },
-      "value": "ERARPP19YJT05",
+      "value": "A0QKG4ERMXSFG",
     },
   ],
 }
@@ -144,63 +164,77 @@ exports[`Phase 3: Variable System 3.8 var list --tag important filters by label
 
 exports[`Phase 3: Variable System 3.9 var tag remove deletes label 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "92JS8RXGKDKC2",
   "value": {
     "labels": [],
     "name": "myapp/config",
-    "schema": "7XX5H51CVD9H0",
+    "schema": "3K9ETAPGFPE32",
     "tags": {
       "env": "prod",
     },
-    "value": "ERARPP19YJT05",
+    "value": "A0QKG4ERMXSFG",
   },
 }
 `;
 
 exports[`Phase 3: Variable System 3.10 var delete removes variable 1`] = `
 {
-  "type": "E1D32N3GT69Q8",
+  "type": "00YH4RTNVWTRB",
   "value": [
     {
       "labels": [],
       "name": "myapp/config",
-      "schema": "7XX5H51CVD9H0",
+      "schema": "3K9ETAPGFPE32",
       "tags": {
         "env": "prod",
       },
-      "value": "ERARPP19YJT05",
+      "value": "A0QKG4ERMXSFG",
     },
   ],
 }
 `;
 
-exports[`Phase 3: Variable System 3.11 var get deleted variable returns not found 1`] = `"Error: Variable not found: name=myapp/config, schema=7XX5H51CVD9H0"`;
+exports[`Phase 3: Variable System 3.11 var get deleted variable returns not found 1`] = `"Error: Variable not found: name=myapp/config, schema=3K9ETAPGFPE32"`;
 
 exports[`Phase 4: Template System 4.1 template set registers template 1`] = `
-"{
-  "schemaHash": "7XX5H51CVD9H0",
-  "contentHash": "FC8WACA792B6F"
-}"
+{
+  "type": "DTNQZ90QQHA6D",
+  "value": {
+    "contentHash": "DBBPX5JJ74SWZ",
+    "schemaHash": "3K9ETAPGFPE32",
+  },
+}
 `;
 
-exports[`Phase 4: Template System 4.2 template get returns template text 1`] = `"Name: {{ payload.name }}, Age: {{ payload.age }}"`;
+exports[`Phase 4: Template System 4.2 template get returns template text 1`] = `
+{
+  "type": "8KMGVC6TG12TS",
+  "value": "Name: {{ payload.name }}, Age: {{ payload.age }}",
+}
+`;
 
 exports[`Phase 4: Template System 4.3 template list shows registered templates 1`] = `
-"[
-  {
-    "schemaHash": "7XX5H51CVD9H0",
-    "preview": "Name: {{ payload.name }}, Age: {{ payload.age }}"
-  }
-]"
+{
+  "type": "6RZCT3XX4J8BC",
+  "value": [
+    {
+      "contentHash": "DBBPX5JJ74SWZ",
+      "schemaHash": "3K9ETAPGFPE32",
+    },
+  ],
+}
 `;
 
 exports[`Phase 4: Template System 4.4 template delete removes template 1`] = `
-"{
-  "deleted": true
-}"
+{
+  "type": "DBHJH385HGVTM",
+  "value": {
+    "deleted": true,
+  },
+}
 `;
 
-exports[`Phase 4: Template System 4.5 template get deleted template returns not found 1`] = `"Error: Template not found for schema: 7XX5H51CVD9H0"`;
+exports[`Phase 4: Template System 4.5 template get deleted template returns not found 1`] = `"Error: Template not found for schema: 3K9ETAPGFPE32"`;
 
 exports[`Phase 5: Render 5.1 render fills payload variables 1`] = `"Hello Alice!"`;
 
@@ -215,27 +249,31 @@ exports[`Phase 7: Edge Cases 7.4 var set name with invalid chars errors 1`] = `"
 exports[`Phase 7: Edge Cases 7.5 no subcommand shows help text 1`] = `
 "Usage: json-cas [--store <path>] [--json] <command> [args]
 
+All JSON commands emit a { type, value } envelope. The type is the hash of the
+command's @output/* schema (shown in parentheses); pipe any envelope into
+\`render -p\` to render its value (cas_ref hashes are expanded).
+
 Commands:
-  put <type-hash> <file.json>       Store node, print hash
-  get <hash>                        Print node as JSON
-  has <hash>                        Print true/false
-  verify <hash>                     Verify integrity + schema, print ok/corrupted/invalid
-  refs <hash>                       List direct cas_ref edges
-  walk <hash> [--format tree]       Recursive traversal
-  hash <type-hash> <file.json>      Compute hash without storing (dry run)
-  render <hash> [options]           Render node as YAML with resolution decay
-  render --pipe/-p [options]        Render { type, value } from stdin
-  list --type <hash-or-alias>       List all hashes for a given type
-  var set <name> <hash> [--tag <tag>...] Create/update a variable
-  var get <name> --schema <hash>    Get a variable by name + schema
-  var delete <name> [--schema <hash>] Delete variable(s)
-  var list [prefix] [--schema <hash>] [--tag <tag>...] List variables
-  var tag <name> --schema <hash> <operations...> Modify tags/labels
-  template set <schema-hash> <file> | --inline <text> Set template for schema
-  template get <schema-hash>        Get template content as raw text
-  template list                     List all templates
-  template delete <schema-hash>     Delete template for schema
-  gc                                Run garbage collection
+  put <type-hash> <file.json|--pipe> Store node, print envelope (value=hash)            (@output/put)
+  get <hash>                        Print node as envelope                             (@output/get)
+  has <hash>                        Print envelope (value=boolean)                     (@output/has)
+  verify <hash>                     Verify integrity + schema (value=ok/corrupted/invalid) (@output/verify)
+  refs <hash>                       List direct cas_ref edges                          (@output/refs)
+  walk <hash> [--format tree]       Recursive traversal                                (@output/walk)
+  hash <type-hash> <file.json|--pipe> Compute hash without storing                     (@output/hash)
+  render <hash> [options]           Render node as text with resolution decay (raw output)
+  render --pipe/-p [options]        Render { type, value } from stdin (raw output)
+  list --type <hash-or-alias>       List hashes for a type (value=string[])            (@output/list)
+  var set <name> <hash> [--tag <tag>...] Create/update a variable                      (@output/var-set)
+  var get <name> --schema <hash>    Get a variable by name + schema                    (@output/var-get)
+  var delete <name> [--schema <hash>] Delete variable(s)                               (@output/var-delete)
+  var list [prefix] [--schema <hash>] [--tag <tag>...] List variables                  (@output/var-list)
+  var tag <name> --schema <hash> <operations...> Modify tags/labels                    (@output/var-tag)
+  template set <schema-hash> <file> | --inline <text> Set template for schema          (@output/template-set)
+  template get <schema-hash>        Get template content (value=string)                (@output/template-get)
+  template list                     List all templates                                 (@output/template-list)
+  template delete <schema-hash>     Delete template for schema                         (@output/template-delete)
+  gc                                Run garbage collection                             (@output/gc)
 
 Flags:
   --store <path>      Store directory (default: ~/.uncaged/json-cas)
@@ -247,5 +285,5 @@ Flags:
   --resolution <n>    Initial resolution for render (default: 1.0)
   --decay <n>         Decay factor for render (default: 0.5)
   --epsilon <n>       Cutoff threshold for render (default: 0.01)
-  --pipe, -p          Read { type, value } JSON from stdin for render"
+  --pipe, -p          Read from stdin (put/hash: raw JSON payload; render: { type, value } envelope)"
 `;

packages/cli-json-cas/src/cli.test.ts

@@ -15,6 +15,11 @@ import { createFsStore, openStore as openFsStore } from "@uncaged/json-cas-fs";
 const pkgPath = resolve(import.meta.dir, "../package.json");
 const entrypoint = resolve(import.meta.dir, "index.ts");
 
+/** Extract the `value` field from a { type, value } envelope JSON string. */
+function envValue(json: string): unknown {
+  return (JSON.parse(json.trim()) as { value: unknown }).value;
+}
+
 /**
  * Register a schema directly via the library (CLI schema put was removed).
  * Returns the type hash.
@@ -168,8 +173,8 @@ describe("@ Alias Resolution - put", () => {
 
     expect(exitCode).toBe(0);
     expect(stderr).toBe("");
-    // Should output a valid hash (13 chars)
-    expect(stdout).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    // Should output an envelope whose value is a valid hash (13 chars)
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
   });
 
   test("ucas put @number <file> should resolve alias", async () => {
@@ -185,7 +190,7 @@ describe("@ Alias Resolution - put", () => {
     );
 
     expect(exitCode).toBe(0);
-    expect(stdout).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
   });
 
   test("ucas put @object <file> should resolve alias", async () => {
@@ -201,7 +206,7 @@ describe("@ Alias Resolution - put", () => {
     );
 
     expect(exitCode).toBe(0);
-    expect(stdout).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
   });
 
   test("ucas put @invalid <file> should fail", async () => {
@@ -219,6 +224,39 @@ describe("@ Alias Resolution - put", () => {
     expect(exitCode).not.toBe(0);
     expect(stderr.length).toBeGreaterThan(0);
   });
+
+  test("ucas put @schema with nested type constraints should succeed", async () => {
+    await runCliAlias("init");
+
+    const schemaFile = join(testDir, "constrained-schema.json");
+    writeFileSync(
+      schemaFile,
+      JSON.stringify({
+        type: "object",
+        properties: {
+          name: { type: "string", minLength: 1, maxLength: 50 },
+          age: { type: "number", minimum: 0, maximum: 150 },
+          tags: {
+            type: "array",
+            items: { type: "string" },
+            minItems: 1,
+            uniqueItems: true,
+          },
+        },
+        required: ["name"],
+      }),
+    );
+
+    const { stdout, stderr, exitCode } = await runCliAlias(
+      "put",
+      "@schema",
+      schemaFile,
+    );
+
+    expect(exitCode).toBe(0);
+    expect(stderr).toBe("");
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+  });
 });
 
 describe("@ Alias Resolution - hash", () => {
@@ -236,7 +274,7 @@ describe("@ Alias Resolution - hash", () => {
 
     expect(exitCode).toBe(0);
     expect(stderr).toBe("");
-    expect(stdout).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
   });
 });
 
@@ -313,10 +351,10 @@ describe("Issue #50: Schema Validation in put", () => {
 
         expect(exitCode).toBe(0);
         expect(stderr).toBe("");
-        expect(stdout.trim()).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+        expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
 
         // Verify node was stored
-        const hash = stdout.trim();
+        const hash = envValue(stdout) as string;
         const { exitCode: hasExitCode } = await runCli(["has", hash], tmpStore);
         expect(hasExitCode).toBe(0);
       } finally {
@@ -355,7 +393,7 @@ describe("Issue #50: Schema Validation in put", () => {
         );
 
         expect(exitCode).toBe(0);
-        expect(stdout.trim()).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+        expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
       } finally {
         rmSync(tmpStore, { recursive: true, force: true });
       }
@@ -403,7 +441,7 @@ describe("Issue #50: Schema Validation in put", () => {
         );
 
         expect(exitCode).toBe(0);
-        expect(stdout.trim()).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+        expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
       } finally {
         rmSync(tmpStore, { recursive: true, force: true });
       }
@@ -423,7 +461,7 @@ describe("Issue #50: Schema Validation in put", () => {
         );
 
         expect(exitCode).toBe(0);
-        expect(stdout.trim()).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+        expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
       } finally {
         rmSync(tmpStore, { recursive: true, force: true });
       }
@@ -469,7 +507,7 @@ describe("Issue #50: Schema Validation in put", () => {
           ["has", "0000000000000"],
           tmpStore,
         );
-        expect(hasOutput.trim()).toBe("false");
+        expect(envValue(hasOutput)).toBe(false);
       } finally {
         rmSync(tmpStore, { recursive: true, force: true });
       }
@@ -692,7 +730,7 @@ describe("Issue #50: Schema Validation in put", () => {
         );
 
         expect(exitCode).toBe(0);
-        expect(stdout.trim()).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+        expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
       } finally {
         rmSync(tmpStore, { recursive: true, force: true });
       }
@@ -850,33 +888,30 @@ describe("Suite 6: CLI Integration with Templates", () => {
       // Create node
       const nodeFile = join(tmpStore, "node.json");
       writeFileSync(nodeFile, JSON.stringify({ name: "Alice" }));
-      const { stdout: nodeHash } = await runCli(
+      const { stdout: nodeOut } = await runCli(
         ["put", schemaHash.trim(), nodeFile],
         tmpStore,
       );
+      const nodeHash = envValue(nodeOut) as string;
 
       // Create template file (JSON-encoded string)
       const templateFile = join(tmpStore, "template.json");
       writeFileSync(templateFile, JSON.stringify("Hello {{ payload.name }}!"));
-      const { stdout: tmplHash } = await runCli(
+      const { stdout: tmplOut } = await runCli(
         ["put", "@string", templateFile],
         tmpStore,
       );
+      const tmplHash = envValue(tmplOut) as string;
 
       // Register template
       await runCli(
-        [
-          "var",
-          "set",
-          `@ucas/template/text/${schemaHash.trim()}`,
-          tmplHash.trim(),
-        ],
+        ["var", "set", `@ucas/template/text/${schemaHash.trim()}`, tmplHash],
         tmpStore,
       );
 
       // Render with template
       const { stdout: output, exitCode } = await runCli(
-        ["render", nodeHash.trim()],
+        ["render", nodeHash],
         tmpStore,
       );
 
@@ -911,21 +946,23 @@ describe("Suite 6: CLI Integration with Templates", () => {
       // Create child node
       const childFile = join(tmpStore, "child.json");
       writeFileSync(childFile, JSON.stringify({ value: "child", child: null }));
-      const { stdout: childHash } = await runCli(
+      const { stdout: childOut } = await runCli(
         ["put", schemaHash.trim(), childFile],
         tmpStore,
       );
+      const childHash = envValue(childOut) as string;
 
       // Create parent node
       const parentFile = join(tmpStore, "parent.json");
       writeFileSync(
         parentFile,
-        JSON.stringify({ value: "parent", child: childHash.trim() }),
+        JSON.stringify({ value: "parent", child: childHash }),
       );
-      const { stdout: parentHash } = await runCli(
+      const { stdout: parentOut } = await runCli(
         ["put", schemaHash.trim(), parentFile],
         tmpStore,
       );
+      const parentHash = envValue(parentOut) as string;
 
       // Create template showing resolution (JSON-encoded string)
       const templateFile = join(tmpStore, "template.json");
@@ -933,25 +970,21 @@ describe("Suite 6: CLI Integration with Templates", () => {
         templateFile,
         JSON.stringify("{{ payload.value }}(res={{ resolution }})"),
       );
-      const { stdout: tmplHash } = await runCli(
+      const { stdout: tmplOut } = await runCli(
         ["put", "@string", templateFile],
         tmpStore,
       );
+      const tmplHash = envValue(tmplOut) as string;
 
       // Register template
       await runCli(
-        [
-          "var",
-          "set",
-          `@ucas/template/text/${schemaHash.trim()}`,
-          tmplHash.trim(),
-        ],
+        ["var", "set", `@ucas/template/text/${schemaHash.trim()}`, tmplHash],
         tmpStore,
       );
 
       // Render with custom decay
       const { stdout: output, exitCode } = await runCli(
-        ["render", parentHash.trim(), "--decay", "0.7"],
+        ["render", parentHash, "--decay", "0.7"],
         tmpStore,
       );
 
@@ -979,10 +1012,11 @@ describe("Suite 6: CLI Integration with Templates", () => {
 
       const nodeFile = join(tmpStore, "node.json");
       writeFileSync(nodeFile, JSON.stringify({ name: "Bob" }));
-      const { stdout: nodeHash } = await runCli(
+      const { stdout: nodeOut } = await runCli(
         ["put", schemaHash.trim(), nodeFile],
         tmpStore,
       );
+      const nodeHash = envValue(nodeOut) as string;
 
       // Create template (JSON-encoded string)
       const templateFile = join(tmpStore, "template.json");
@@ -990,25 +1024,21 @@ describe("Suite 6: CLI Integration with Templates", () => {
         templateFile,
         JSON.stringify("Greetings {{ payload.name }}!"),
       );
-      const { stdout: tmplHash } = await runCli(
+      const { stdout: tmplOut } = await runCli(
         ["put", "@string", templateFile],
         tmpStore,
       );
+      const tmplHash = envValue(tmplOut) as string;
 
       await runCli(
-        [
-          "var",
-          "set",
-          `@ucas/template/text/${schemaHash.trim()}`,
-          tmplHash.trim(),
-        ],
+        ["var", "set", `@ucas/template/text/${schemaHash.trim()}`, tmplHash],
         tmpStore,
       );
 
       const { stdout: output, exitCode } = await runCli(
         [
           "render",
-          nodeHash.trim(),
+          nodeHash,
           "--resolution",
           "0.8",
           "--decay",
@@ -1043,14 +1073,15 @@ describe("Suite 6: CLI Integration with Templates", () => {
 
       const nodeFile = join(tmpStore, "node.json");
       writeFileSync(nodeFile, JSON.stringify({ name: "Charlie" }));
-      const { stdout: nodeHash } = await runCli(
+      const { stdout: nodeOut } = await runCli(
         ["put", schemaHash.trim(), nodeFile],
         tmpStore,
       );
+      const nodeHash = envValue(nodeOut) as string;
 
       // No template registered - should fall back to YAML
       const { stdout: output, exitCode } = await runCli(
-        ["render", nodeHash.trim()],
+        ["render", nodeHash],
         tmpStore,
       );
 
@@ -1079,13 +1110,14 @@ describe("Suite 6: CLI Integration with Templates", () => {
 
       const nodeFile = join(tmpStore, "node.json");
       writeFileSync(nodeFile, JSON.stringify({ name: "Test" }));
-      const { stdout: nodeHash } = await runCli(
+      const { stdout: nodeOut } = await runCli(
         ["put", schemaHash.trim(), nodeFile],
         tmpStore,
       );
+      const nodeHash = envValue(nodeOut) as string;
 
       const { exitCode, stderr } = await runCli(
-        ["render", nodeHash.trim(), "--decay", "1.5"],
+        ["render", nodeHash, "--decay", "1.5"],
         tmpStore,
       );
 
@@ -1126,14 +1158,15 @@ describe("Suite 6: CLI Integration with Templates", () => {
       // Create and store a simple string node
       const nodeFile = join(tmpStore, "test.json");
       writeFileSync(nodeFile, JSON.stringify("hello world"));
-      const { stdout: nodeHash } = await runCli(
+      const { stdout: nodeOut } = await runCli(
         ["put", stringType, nodeFile],
         tmpStore,
       );
+      const nodeHash = envValue(nodeOut) as string;
 
       // Render the valid hash
       const { exitCode, stdout, stderr } = await runCli(
-        ["render", nodeHash.trim()],
+        ["render", nodeHash],
         tmpStore,
       );
 

packages/cli-json-cas/src/e2e.test.ts

@@ -54,6 +54,28 @@ function stripVolatile(json: string): unknown {
   return strip(JSON.parse(json));
 }
 
+/** Extract the `value` field from a { type, value } envelope JSON string. */
+function envValue(json: string): unknown {
+  return (JSON.parse(json) as { value: unknown }).value;
+}
+
+/** Run a CLI command feeding `stdin` to its standard input. */
+async function runCliWithStdin(
+  args: string[],
+  stdin: string,
+): Promise<{ stdout: string; stderr: string; exitCode: number }> {
+  const proc = Bun.spawn(
+    ["bun", entrypoint, "--store", tmpStore, "--var-db", varDbPath, ...args],
+    { stdin: "pipe", stdout: "pipe", stderr: "pipe" },
+  );
+  proc.stdin.write(stdin);
+  proc.stdin.end();
+  const exitCode = await proc.exited;
+  const stdout = (await new Response(proc.stdout).text()).trim();
+  const stderr = (await new Response(proc.stderr).text()).trim();
+  return { stdout, stderr, exitCode };
+}
+
 // ---- Phase 1: CAS Core ----
 
 describe("Phase 1: CAS Core", () => {
@@ -88,8 +110,8 @@ describe("Phase 1: CAS Core", () => {
     writeFileSync(nodeFile, JSON.stringify({ name: "Alice", age: 30 }));
     const { stdout, exitCode } = await runCli(["put", typeHash, nodeFile]);
     expect(exitCode).toBe(0);
-    expect(stdout).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
-    nodeHash = stdout;
+    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    nodeHash = envValue(stdout) as string;
   });
 
   test("1.6 get returns node JSON (snapshot)", async () => {
@@ -101,19 +123,19 @@ describe("Phase 1: CAS Core", () => {
   test("1.7 has returns true for existing node", async () => {
     const { stdout, exitCode } = await runCli(["has", nodeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toBe("true");
+    expect(envValue(stdout)).toBe(true);
   });
 
   test("1.8 has returns false for non-existing hash", async () => {
     const { stdout, exitCode } = await runCli(["has", "AAAAAAAAAAAAA"]);
     expect(exitCode).toBe(0);
-    expect(stdout).toBe("false");
+    expect(envValue(stdout)).toBe(false);
   });
 
   test("1.9 verify returns ok for valid node", async () => {
     const { stdout, exitCode } = await runCli(["verify", nodeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toMatchSnapshot();
+    expect(stripVolatile(stdout)).toMatchSnapshot();
   });
 
   test("1.10 refs lists direct references (snapshot)", async () => {
@@ -132,13 +154,13 @@ describe("Phase 1: CAS Core", () => {
     const nodeFile = join(tmpStore, "test-node.json");
     const { stdout, exitCode } = await runCli(["hash", typeHash, nodeFile]);
     expect(exitCode).toBe(0);
-    expect(stdout).toBe(nodeHash);
+    expect(envValue(stdout)).toBe(nodeHash);
   });
 
   test("1.13 list --type returns nodes of that type", async () => {
     const { stdout, exitCode } = await runCli(["list", "--type", typeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toContain(nodeHash);
+    expect(envValue(stdout)).toContain(nodeHash);
   });
 });
 
@@ -163,7 +185,7 @@ describe("Phase 2: Schema Validation", () => {
   test("2.2 verify on valid node returns ok (hash + schema)", async () => {
     const { stdout, exitCode } = await runCli(["verify", nodeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toBe("ok");
+    expect(envValue(stdout)).toBe("ok");
   });
 
   test("2.3 put against non-existent schema hash fails", async () => {
@@ -222,12 +244,13 @@ describe("Phase 3: Variable System", () => {
   test("3.5 var set upsert updates existing variable", async () => {
     const node2File = join(tmpStore, "node2.json");
     writeFileSync(node2File, JSON.stringify({ name: "Bob", age: 25 }));
-    const { stdout: node2Hash } = await runCli(["put", typeHash, node2File]);
+    const { stdout: node2Out } = await runCli(["put", typeHash, node2File]);
+    const node2Hash = envValue(node2Out) as string;
     const { exitCode, stdout } = await runCli([
       "var",
       "set",
       "myapp/config",
-      node2Hash.trim(),
+      node2Hash,
     ]);
     expect(exitCode).toBe(0);
     expect(stripVolatile(stdout)).toMatchSnapshot();
@@ -330,27 +353,29 @@ describe("Phase 4: Template System", () => {
       tmplFile,
     ]);
     expect(exitCode).toBe(0);
-    expect(stdout).toMatchSnapshot();
+    expect(stripVolatile(stdout)).toMatchSnapshot();
   });
 
   test("4.2 template get returns template text", async () => {
     const { stdout, exitCode } = await runCli(["template", "get", typeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toBe("Name: {{ payload.name }}, Age: {{ payload.age }}");
-    expect(stdout).toMatchSnapshot();
+    expect(envValue(stdout)).toBe(
+      "Name: {{ payload.name }}, Age: {{ payload.age }}",
+    );
+    expect(stripVolatile(stdout)).toMatchSnapshot();
   });
 
   test("4.3 template list shows registered templates", async () => {
     const { stdout, exitCode } = await runCli(["template", "list"]);
     expect(exitCode).toBe(0);
     expect(stdout).toContain(typeHash);
-    expect(stdout).toMatchSnapshot();
+    expect(stripVolatile(stdout)).toMatchSnapshot();
   });
 
   test("4.4 template delete removes template", async () => {
     const { exitCode, stdout } = await runCli(["template", "delete", typeHash]);
     expect(exitCode).toBe(0);
-    expect(stdout).toMatchSnapshot();
+    expect(stripVolatile(stdout)).toMatchSnapshot();
   });
 
   test("4.5 template get deleted template returns not found", async () => {
@@ -405,7 +430,7 @@ describe("Phase 6: GC", () => {
     const gcNodeFile = join(tmpStore, "gc-node.json");
     writeFileSync(gcNodeFile, JSON.stringify({ name: "GcAlice", age: 30 }));
     const { stdout } = await runCli(["put", typeHash, gcNodeFile]);
-    gcNodeHash = stdout.trim();
+    gcNodeHash = envValue(stdout) as string;
     // Set a var referencing this node so it survives GC during Phase 6
     await runCli(["var", "set", "gc-test/ref", gcNodeHash]);
   });
@@ -414,7 +439,7 @@ describe("Phase 6: GC", () => {
     const { exitCode, stdout } = await runCli(["gc"]);
     expect(exitCode).toBe(0);
     // Assert structural shape only — exact counts depend on phase history
-    const result = JSON.parse(stdout) as Record<string, unknown>;
+    const result = envValue(stdout) as Record<string, unknown>;
     expect(typeof result.total).toBe("number");
     expect(typeof result.reachable).toBe("number");
     expect(typeof result.collected).toBe("number");
@@ -428,25 +453,21 @@ describe("Phase 6: GC", () => {
     const { exitCode } = await runCli(["gc"]);
     expect(exitCode).toBe(0);
     const { stdout } = await runCli(["has", gcNodeHash]);
-    expect(stdout).toBe("true");
+    expect(envValue(stdout)).toBe(true);
   });
 
   test("6.3 gc reclaims orphan node", async () => {
     const orphanFile = join(tmpStore, "orphan.json");
     writeFileSync(orphanFile, JSON.stringify({ name: "Orphan", age: 99 }));
-    const { stdout: orphanHashRaw } = await runCli([
-      "put",
-      typeHash,
-      orphanFile,
-    ]);
-    const orphanHash = orphanHashRaw.trim();
+    const { stdout: orphanOut } = await runCli(["put", typeHash, orphanFile]);
+    const orphanHash = envValue(orphanOut) as string;
 
     const { stdout: beforeGc } = await runCli(["has", orphanHash]);
-    expect(beforeGc).toBe("true");
+    expect(envValue(beforeGc)).toBe(true);
 
     await runCli(["gc"]);
     const { stdout: afterGc } = await runCli(["has", orphanHash]);
-    expect(afterGc).toBe("false");
+    expect(envValue(afterGc)).toBe(false);
   });
 });
 
@@ -518,3 +539,157 @@ describe("Phase 7: Edge Cases", () => {
     expect(stderr).toContain("not a directory");
   });
 });
+
+// ---- Phase 8: Pipe Composition ----
+//
+// Every JSON command emits a { type, value } envelope, so its stdout can be
+// fed straight into `render --pipe` (which renders the envelope value) or into
+// any downstream JSON consumer. These tests verify the envelopes compose
+// end-to-end.
+
+describe("Phase 8: Pipe Composition", () => {
+  test("8.1 put | render -p expands the stored hash to its content", async () => {
+    const nodeFile = join(tmpStore, "pipe-node.json");
+    writeFileSync(nodeFile, JSON.stringify({ name: "Bob", age: 42 }));
+
+    const { stdout: putOut, exitCode: putExit } = await runCli([
+      "put",
+      typeHash,
+      nodeFile,
+    ]);
+    expect(putExit).toBe(0);
+
+    // The put envelope value is a cas_ref hash; render -p dereferences it and
+    // renders the stored node's payload.
+    const { stdout, exitCode } = await runCliWithStdin(
+      ["render", "--pipe"],
+      putOut,
+    );
+    expect(exitCode).toBe(0);
+    expect(stdout).toContain("Bob");
+  });
+
+  test("8.2 gc | render -p renders the gc stats", async () => {
+    const { stdout: gcOut, exitCode: gcExit } = await runCli(["gc"]);
+    expect(gcExit).toBe(0);
+
+    const { stdout, exitCode } = await runCliWithStdin(
+      ["render", "--pipe"],
+      gcOut,
+    );
+    expect(exitCode).toBe(0);
+    // gc value is an object { total, reachable, collected, scanned }
+    expect(stdout).toContain("total:");
+  });
+
+  test("8.3 list --type @schema emits a parseable envelope of hashes", async () => {
+    const { stdout, exitCode } = await runCli(["list", "--type", "@schema"]);
+    expect(exitCode).toBe(0);
+
+    // Downstream consumers (jq, etc.) read the `value` array of hashes.
+    const value = envValue(stdout) as string[];
+    expect(Array.isArray(value)).toBe(true);
+    for (const hash of value) {
+      expect(hash).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+    }
+  });
+
+  test("8.4 list --type @schema | render -p expands the schema list", async () => {
+    const { stdout: listOut } = await runCli(["list", "--type", "@schema"]);
+    // list result items are cas_ref hashes; render -p dereferences each one
+    // and renders the schema contents.
+    const { stdout, exitCode } = await runCliWithStdin(
+      ["render", "--pipe"],
+      listOut,
+    );
+    expect(exitCode).toBe(0);
+    expect(stdout.length).toBeGreaterThan(0);
+  });
+
+  test("8.5 render <hash> uses a registered template", async () => {
+    // Register a template for the schema, then render a fresh node by hash.
+    const tmplFile = join(tmpStore, "pipe-render.liquid");
+    writeFileSync(tmplFile, "Person: {{ payload.name }} ({{ payload.age }})");
+    const { exitCode: setExit } = await runCli([
+      "template",
+      "set",
+      typeHash,
+      tmplFile,
+    ]);
+    expect(setExit).toBe(0);
+
+    const nodeFile = join(tmpStore, "pipe-render-node.json");
+    writeFileSync(nodeFile, JSON.stringify({ name: "Carol", age: 25 }));
+    const { stdout: putOut } = await runCli(["put", typeHash, nodeFile]);
+    const freshHash = envValue(putOut) as string;
+
+    const { stdout, exitCode } = await runCli(["render", freshHash]);
+    expect(exitCode).toBe(0);
+    expect(stdout).toBe("Person: Carol (25)");
+  });
+});
+
+// ---- Phase 9: Put/Hash Pipe Input ----
+
+describe("Phase 9: Put/Hash Pipe Input", () => {
+  test("9.1 put -p reads JSON from stdin and stores node", async () => {
+    const payload = JSON.stringify({ name: "PipeAlice", age: 99 });
+    const { stdout, exitCode } = await runCliWithStdin(
+      ["put", typeHash, "-p"],
+      payload,
+    );
+    expect(exitCode).toBe(0);
+    const hash = envValue(stdout);
+    expect(hash).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+
+    // Verify stored correctly
+    const { stdout: getOut } = await runCli(["get", hash as string]);
+    expect(getOut).toContain("PipeAlice");
+  });
+
+  test("9.2 hash -p reads JSON from stdin and computes hash without storing", async () => {
+    const payload = JSON.stringify({ name: "PipeBob", age: 55 });
+    const { stdout, exitCode } = await runCliWithStdin(
+      ["hash", typeHash, "-p"],
+      payload,
+    );
+    expect(exitCode).toBe(0);
+    const hash = envValue(stdout);
+    expect(hash).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
+
+    // Should NOT be stored
+    const { exitCode: hasExit, stdout: hasOut } = await runCli([
+      "has",
+      hash as string,
+    ]);
+    expect(hasExit).toBe(0);
+    expect(envValue(hasOut)).toBe(false);
+  });
+
+  test("9.3 put -p with file arg errors", async () => {
+    const { stderr, exitCode } = await runCliWithStdin(
+      ["put", typeHash, "some-file.json", "-p"],
+      "{}",
+    );
+    expect(exitCode).not.toBe(0);
+    expect(stderr).toContain("Cannot use --pipe/-p with a file argument");
+  });
+
+  test("9.4 put -p with empty stdin errors", async () => {
+    const { stderr, exitCode } = await runCliWithStdin(
+      ["put", typeHash, "-p"],
+      "",
+    );
+    expect(exitCode).not.toBe(0);
+    expect(stderr).toContain("No input on stdin");
+  });
+
+  test("9.5 put -p with invalid JSON errors", async () => {
+    const { stderr, exitCode } = await runCliWithStdin(
+      ["put", typeHash, "-p"],
+      "not json",
+    );
+    expect(exitCode).not.toBe(0);
+    expect(stderr).toContain("Invalid JSON on stdin");
+  });
+});

packages/cli-json-cas/src/index.ts

@@ -3,7 +3,7 @@
 import { existsSync, readFileSync } from "node:fs";
 import { homedir } from "node:os";
 import { join, resolve } from "node:path";
-import type { Hash, JSONSchema, Store, VariableStore } from "@uncaged/json-cas";
+import type { Hash, Store, VariableStore } from "@uncaged/json-cas";
 import {
   bootstrap,
   CasNodeNotFoundError,
@@ -22,6 +22,7 @@ import {
   validate,
   verify,
   walk,
+  wrapEnvelope,
 } from "@uncaged/json-cas";
 import { openStore as openFsStore } from "@uncaged/json-cas-fs";
 
@@ -74,6 +75,8 @@ function parseArgs(argv: string[]): { flags: Flags; positional: string[] } {
       } else {
         flags[key] = true;
       }
+    } else if (arg === "-p") {
+      flags.p = true;
     } else {
       positional.push(arg);
     }
@@ -112,6 +115,22 @@ function readJsonFile(file: string): unknown {
   }
 }
 
+async function readStdinJson(): Promise<unknown> {
+  const chunks: Buffer[] = [];
+  for await (const chunk of process.stdin) {
+    chunks.push(chunk as Buffer);
+  }
+  const input = Buffer.concat(chunks).toString("utf-8").trim();
+  if (!input) {
+    die("No input on stdin. Pipe JSON content.");
+  }
+  try {
+    return JSON.parse(input);
+  } catch {
+    return die("Invalid JSON on stdin.");
+  }
+}
+
 /**
  * Open the filesystem-backed CAS store.
  * Automatically creates directory and bootstraps if needed.
@@ -144,55 +163,6 @@ async function resolveTypeHash(typeHashOrAlias: string): Promise<Hash> {
   return typeHashOrAlias;
 }
 
-/**
- * Get the Variable schema's CAS hash
- * This is the type hash used in JSON envelopes
- */
-async function getVariableSchemaHash(): Promise<Hash> {
-  const store = await openStore();
-
-  // Define the Variable JSON Schema (updated for new model with composite key)
-  const variableSchema: JSONSchema = {
-    title: "Variable",
-    type: "object",
-    properties: {
-      name: { type: "string" },
-      schema: { type: "string" },
-      value: { type: "string" },
-      created: { type: "number" },
-      updated: { type: "number" },
-      tags: { type: "object" },
-      labels: { type: "array", items: { type: "string" } },
-    },
-    required: [
-      "name",
-      "schema",
-      "value",
-      "created",
-      "updated",
-      "tags",
-      "labels",
-    ],
-  };
-
-  // Compute hash or retrieve from store
-  const hash = await putSchema(store, variableSchema);
-  return hash;
-}
-
-/**
- * Wrap Variable output in JSON envelope
- */
-async function wrapVariableEnvelope(
-  variable: unknown,
-): Promise<{ type: Hash; value: unknown }> {
-  const typeHash = await getVariableSchemaHash();
-  return {
-    type: typeHash,
-    value: variable,
-  };
-}
-
 /**
  * Parse tag/label arguments
  * Returns: { tags: Record<string, string>, labels: string[], deleteNames: string[] }
@@ -228,14 +198,36 @@ function parseTagsLabels(args: string[]): {
 // ---- Commands ----
 
 async function cmdPut(args: string[]): Promise<void> {
+  const isPipe = flags.pipe === true || flags.p === true;
   const typeHashOrAlias = args[0];
-  const file = args[1];
-  if (!typeHashOrAlias || !file)
-    die("Usage: json-cas put <type-hash> <file.json>");
+  const file = isPipe ? undefined : args[1];
+  if (!typeHashOrAlias || (!isPipe && !file))
+    die(
+      "Usage: json-cas put <type-hash> <file.json>\n       json-cas put <type-hash> --pipe/-p",
+    );
+  if (isPipe && args[1])
+    die("Cannot use --pipe/-p with a file argument. Use one or the other.");
   const typeHash = await resolveTypeHash(typeHashOrAlias);
-  const payload = readJsonFile(file);
+  const payload = isPipe ? await readStdinJson() : readJsonFile(file as string);
   const store = await openStore();
 
+  // Schema nodes: use putSchema() which validates via isValidSchema() (recursive)
+  // instead of ajv against meta-schema (which can't express recursive constraints)
+  const builtinSchemas = await bootstrap(store);
+  const metaHash = builtinSchemas["@schema"];
+  if (typeHash === metaHash) {
+    try {
+      const hash = await putSchema(store, payload as Record<string, unknown>);
+      out(await wrapEnvelope(store, "@output/put", hash));
+    } catch (e) {
+      console.error(
+        `Validation failed: payload in ${file} does not match schema ${typeHash}`,
+      );
+      process.exit(1);
+    }
+    return;
+  }
+
   // Check if schema exists
   const schema = getSchema(store, typeHash);
   if (schema === null) {
@@ -253,7 +245,7 @@ async function cmdPut(args: string[]): Promise<void> {
   }
 
   const hash = await store.put(typeHash, payload);
-  console.log(hash);
+  out(await wrapEnvelope(store, "@output/put", hash));
 }
 
 async function cmdGet(args: string[]): Promise<void> {
@@ -262,14 +254,14 @@ async function cmdGet(args: string[]): Promise<void> {
   const store = await openStore();
   const node = store.get(hash);
   if (node === null) die(`Node not found: ${hash}`);
-  out(node);
+  out(await wrapEnvelope(store, "@output/get", node));
 }
 
 async function cmdHas(args: string[]): Promise<void> {
   const hash = args[0];
   if (!hash) die("Usage: json-cas has <hash>");
   const store = await openStore();
-  console.log(String(store.has(hash)));
+  out(await wrapEnvelope(store, "@output/has", store.has(hash)));
 }
 
 async function cmdVerify(args: string[]): Promise<void> {
@@ -279,12 +271,13 @@ async function cmdVerify(args: string[]): Promise<void> {
   const node = store.get(hash);
   if (node === null) die(`Node not found: ${hash}`);
   const ok = await verify(hash, node);
+  let status: string;
   if (!ok) {
-    console.log("corrupted");
+    status = "corrupted";
   } else {
-    const valid = validate(store, node);
-    console.log(valid ? "ok" : "invalid");
+    status = validate(store, node) ? "ok" : "invalid";
   }
+  out(await wrapEnvelope(store, "@output/verify", status));
 }
 
 async function cmdRefs(args: string[]): Promise<void> {
@@ -294,9 +287,7 @@ async function cmdRefs(args: string[]): Promise<void> {
   const node = store.get(hash);
   if (node === null) die(`Node not found: ${hash}`);
   const refHashes = refs(store, node);
-  for (const r of refHashes) {
-    console.log(r);
-  }
+  out(await wrapEnvelope(store, "@output/refs", refHashes));
 }
 
 async function cmdWalk(args: string[]): Promise<void> {
@@ -312,15 +303,16 @@ async function cmdWalk(args: string[]): Promise<void> {
     });
 
     const printed = new Set<Hash>();
+    const lines: string[] = [];
 
     function printNode(h: Hash, prefix: string, isLast: boolean): void {
       const connector = prefix === "" ? "" : isLast ? "└── " : "├── ";
       if (printed.has(h)) {
-        console.log(`${prefix}${connector}${h} (seen)`);
+        lines.push(`${prefix}${connector}${h} (seen)`);
         return;
       }
       printed.add(h);
-      console.log(`${prefix}${connector}${h}`);
+      lines.push(`${prefix}${connector}${h}`);
 
       const kids = childMap.get(h) ?? [];
       const childPrefix =
@@ -331,22 +323,31 @@ async function cmdWalk(args: string[]): Promise<void> {
     }
 
     printNode(hash, "", true);
+    out(await wrapEnvelope(store, "@output/walk", lines.join("\n")));
   } else {
+    const hashes: Hash[] = [];
     walk(store, hash, (h) => {
-      console.log(h);
+      hashes.push(h);
     });
+    out(await wrapEnvelope(store, "@output/walk", hashes));
   }
 }
 
 async function cmdHash(args: string[]): Promise<void> {
+  const isPipe = flags.pipe === true || flags.p === true;
   const typeHashOrAlias = args[0];
-  const file = args[1];
-  if (!typeHashOrAlias || !file)
-    die("Usage: json-cas hash <type-hash> <file.json>");
+  const file = isPipe ? undefined : args[1];
+  if (!typeHashOrAlias || (!isPipe && !file))
+    die(
+      "Usage: json-cas hash <type-hash> <file.json>\n       json-cas hash <type-hash> --pipe/-p",
+    );
+  if (isPipe && args[1])
+    die("Cannot use --pipe/-p with a file argument. Use one or the other.");
   const typeHash = await resolveTypeHash(typeHashOrAlias);
-  const payload = readJsonFile(file);
+  const payload = isPipe ? await readStdinJson() : readJsonFile(file as string);
   const hash = await computeHash(typeHash, payload);
-  console.log(hash);
+  const store = await openStore();
+  out(await wrapEnvelope(store, "@output/hash", hash));
 }
 
 async function cmdRender(args: string[]): Promise<void> {
@@ -468,7 +469,8 @@ async function cmdVarSet(args: string[]): Promise<void> {
     die("Usage: json-cas var set <name> <hash> [--tag <tag>...]");
   }
 
-  const varStore = await openVarStore();
+  const store = await openStore();
+  const varStore = createVariableStore(resolve(varDbPath), store);
 
   try {
     // Parse tags/labels from --tag flags
@@ -495,8 +497,7 @@ async function cmdVarSet(args: string[]): Promise<void> {
         : undefined;
 
     const variable = varStore.set(name, value, options);
-    const envelope = await wrapVariableEnvelope(variable);
-    out(envelope);
+    out(await wrapEnvelope(store, "@output/var-set", variable));
   } catch (e) {
     if (
       e instanceof InvalidVariableNameError ||
@@ -519,15 +520,15 @@ async function cmdVarGet(args: string[]): Promise<void> {
     die("Usage: json-cas var get <name> --schema <hash>");
   }
 
-  const varStore = await openVarStore();
+  const store = await openStore();
+  const varStore = createVariableStore(resolve(varDbPath), store);
 
   try {
     const variable = varStore.get(name, schema);
     if (variable === null) {
       die(`Error: Variable not found: name=${name}, schema=${schema}`);
     }
-    const envelope = await wrapVariableEnvelope(variable);
-    out(envelope);
+    out(await wrapEnvelope(store, "@output/var-get", variable));
   } finally {
     varStore.close();
   }
@@ -541,19 +542,18 @@ async function cmdVarDelete(args: string[]): Promise<void> {
     die("Usage: json-cas var delete <name> [--schema <hash>]");
   }
 
-  const varStore = await openVarStore();
+  const store = await openStore();
+  const varStore = createVariableStore(resolve(varDbPath), store);
 
   try {
     if (schema !== undefined) {
       // Precise deletion: remove specific (name, schema) variant
       const variable = varStore.remove(name, schema);
-      const envelope = await wrapVariableEnvelope(variable);
-      out(envelope);
+      out(await wrapEnvelope(store, "@output/var-delete", variable));
     } else {
       // Batch deletion: remove all variants for this name
       const variables = varStore.remove(name);
-      const envelope = await wrapVariableEnvelope(variables);
-      out(envelope);
+      out(await wrapEnvelope(store, "@output/var-delete", variables));
     }
   } catch (e) {
     if (e instanceof VariableNotFoundError) {
@@ -578,7 +578,8 @@ async function cmdVarTag(args: string[]): Promise<void> {
     die("Usage: json-cas var tag <name> --schema <hash> <operations...>");
   }
 
-  const varStore = await openVarStore();
+  const store = await openStore();
+  const varStore = createVariableStore(resolve(varDbPath), store);
 
   try {
     const { tags, labels, deleteNames } = parseTagsLabels(tagArgs);
@@ -589,8 +590,7 @@ async function cmdVarTag(args: string[]): Promise<void> {
       delete: deleteNames.length > 0 ? deleteNames : undefined,
     });
 
-    const envelope = await wrapVariableEnvelope(variable);
-    out(envelope);
+    out(await wrapEnvelope(store, "@output/var-tag", variable));
   } catch (e) {
     if (
       e instanceof VariableNotFoundError ||
@@ -610,7 +610,8 @@ async function cmdVarList(args: string[]): Promise<void> {
   const schema = flags.schema as string | undefined;
   const tagFlags = flags.tag;
 
-  const varStore = await openVarStore();
+  const store = await openStore();
+  const varStore = createVariableStore(resolve(varDbPath), store);
 
   try {
     // Parse tags/labels from --tag flags
@@ -632,8 +633,7 @@ async function cmdVarList(args: string[]): Promise<void> {
       tags: Object.keys(tags).length > 0 ? tags : undefined,
       labels: labels.length > 0 ? labels : undefined,
     });
-    const envelope = await wrapVariableEnvelope(variables);
-    out(envelope);
+    out(await wrapEnvelope(store, "@output/var-list", variables));
   } catch (e) {
     if (e instanceof InvalidVariableNameError) {
       die(`Error: ${e.message}`);
@@ -702,10 +702,12 @@ async function cmdTemplateSet(args: string[]): Promise<void> {
     const varName = `@ucas/template/text/${schemaHash}`;
     varStore.set(varName, contentHash);
 
-    out({
-      schemaHash,
-      contentHash,
-    });
+    out(
+      await wrapEnvelope(store, "@output/template-set", {
+        schemaHash,
+        contentHash,
+      }),
+    );
   } catch (e) {
     if (e instanceof CasNodeNotFoundError) {
       die(`Error: ${e.message}`);
@@ -741,8 +743,9 @@ async function cmdTemplateGet(args: string[]): Promise<void> {
       die(`Error: Content not found in CAS: ${variable.value}`);
     }
 
-    // Output raw text (not JSON)
-    process.stdout.write(node.payload as string);
+    out(
+      await wrapEnvelope(store, "@output/template-get", node.payload as string),
+    );
   } finally {
     varStore.close();
   }
@@ -759,24 +762,12 @@ async function cmdTemplateList(_args: string[]): Promise<void> {
       schema: stringHash,
     });
 
-    const templates = variables.map((v) => {
-      const schemaHash = v.name.replace("@ucas/template/text/", "");
+    const templates = variables.map((v) => ({
+      schemaHash: v.name.replace("@ucas/template/text/", ""),
+      contentHash: v.value,
+    }));
 
-      // Get content for preview
-      const node = store.get(v.value);
-      const content = (node?.payload as string | undefined) ?? "";
-
-      // Truncate preview to 80 chars
-      const preview =
-        content.length > 80 ? `${content.slice(0, 77)}...` : content;
-
-      return {
-        schemaHash,
-        preview,
-      };
-    });
-
-    out(templates);
+    out(await wrapEnvelope(store, "@output/template-list", templates));
   } finally {
     varStore.close();
   }
@@ -797,7 +788,9 @@ async function cmdTemplateDelete(args: string[]): Promise<void> {
     const stringHash = await resolveTypeHash("@string");
     varStore.remove(varName, stringHash);
 
-    out({ deleted: true });
+    out(
+      await wrapEnvelope(store, "@output/template-delete", { deleted: true }),
+    );
   } catch (e) {
     if (e instanceof VariableNotFoundError) {
       die(`Error: Template not found for schema: ${schemaHash}`);
@@ -814,7 +807,7 @@ async function cmdGc(_args: string[]): Promise<void> {
 
   try {
     const stats = gc(store, varStore);
-    out(stats);
+    out(await wrapEnvelope(store, "@output/gc", stats));
   } finally {
     varStore.close();
   }
@@ -826,36 +819,39 @@ async function cmdList(_args: string[]): Promise<void> {
     die("Usage: json-cas list --type <hash-or-alias>");
   const typeHash = await resolveTypeHash(typeFlag);
   const store = await openStore();
-  for (const hash of store.listByType(typeHash)) {
-    console.log(hash);
-  }
+  const hashes = Array.from(store.listByType(typeHash));
+  out(await wrapEnvelope(store, "@output/list", hashes));
 }
 
 function printUsage(): void {
   console.log(`\
 Usage: json-cas [--store <path>] [--json] <command> [args]
 
+All JSON commands emit a { type, value } envelope. The type is the hash of the
+command's @output/* schema (shown in parentheses); pipe any envelope into
+\`render -p\` to render its value (cas_ref hashes are expanded).
+
 Commands:
-  put <type-hash> <file.json>       Store node, print hash
-  get <hash>                        Print node as JSON
-  has <hash>                        Print true/false
-  verify <hash>                     Verify integrity + schema, print ok/corrupted/invalid
-  refs <hash>                       List direct cas_ref edges
-  walk <hash> [--format tree]       Recursive traversal
-  hash <type-hash> <file.json>      Compute hash without storing (dry run)
-  render <hash> [options]           Render node as YAML with resolution decay
-  render --pipe/-p [options]        Render { type, value } from stdin
-  list --type <hash-or-alias>       List all hashes for a given type
-  var set <name> <hash> [--tag <tag>...] Create/update a variable
-  var get <name> --schema <hash>    Get a variable by name + schema
-  var delete <name> [--schema <hash>] Delete variable(s)
-  var list [prefix] [--schema <hash>] [--tag <tag>...] List variables
-  var tag <name> --schema <hash> <operations...> Modify tags/labels
-  template set <schema-hash> <file> | --inline <text> Set template for schema
-  template get <schema-hash>        Get template content as raw text
-  template list                     List all templates
-  template delete <schema-hash>     Delete template for schema
-  gc                                Run garbage collection
+  put <type-hash> <file.json|--pipe> Store node, print envelope (value=hash)            (@output/put)
+  get <hash>                        Print node as envelope                             (@output/get)
+  has <hash>                        Print envelope (value=boolean)                     (@output/has)
+  verify <hash>                     Verify integrity + schema (value=ok/corrupted/invalid) (@output/verify)
+  refs <hash>                       List direct cas_ref edges                          (@output/refs)
+  walk <hash> [--format tree]       Recursive traversal                                (@output/walk)
+  hash <type-hash> <file.json|--pipe> Compute hash without storing                     (@output/hash)
+  render <hash> [options]           Render node as text with resolution decay (raw output)
+  render --pipe/-p [options]        Render { type, value } from stdin (raw output)
+  list --type <hash-or-alias>       List hashes for a type (value=string[])            (@output/list)
+  var set <name> <hash> [--tag <tag>...] Create/update a variable                      (@output/var-set)
+  var get <name> --schema <hash>    Get a variable by name + schema                    (@output/var-get)
+  var delete <name> [--schema <hash>] Delete variable(s)                               (@output/var-delete)
+  var list [prefix] [--schema <hash>] [--tag <tag>...] List variables                  (@output/var-list)
+  var tag <name> --schema <hash> <operations...> Modify tags/labels                    (@output/var-tag)
+  template set <schema-hash> <file> | --inline <text> Set template for schema          (@output/template-set)
+  template get <schema-hash>        Get template content (value=string)                (@output/template-get)
+  template list                     List all templates                                 (@output/template-list)
+  template delete <schema-hash>     Delete template for schema                         (@output/template-delete)
+  gc                                Run garbage collection                             (@output/gc)
 
 Flags:
   --store <path>      Store directory (default: ~/.uncaged/json-cas)
@@ -867,7 +863,7 @@ Flags:
   --resolution <n>    Initial resolution for render (default: 1.0)
   --decay <n>         Decay factor for render (default: 0.5)
   --epsilon <n>       Cutoff threshold for render (default: 0.01)
-  --pipe, -p          Read { type, value } JSON from stdin for render`);
+  --pipe, -p          Read from stdin (put/hash: raw JSON payload; render: { type, value } envelope)`);
 }
 
 // ---- Dispatch ----

packages/cli-json-cas/src/template.test.ts

@@ -103,9 +103,10 @@ describe("template set", () => {
     expect(exitCode).toBe(0);
     expect(stderr).toBe("");
 
-    const output = JSON.parse(stdout);
-    expect(output).toHaveProperty("contentHash");
-    expect(output.schemaHash).toBe(stringHash);
+    const envelope = JSON.parse(stdout);
+    expect(envelope).toHaveProperty("type");
+    expect(envelope.value).toHaveProperty("contentHash");
+    expect(envelope.value.schemaHash).toBe(stringHash);
   });
 
   test("set template with --inline flag", async () => {
@@ -122,9 +123,10 @@ describe("template set", () => {
 
     expect(exitCode).toBe(0);
 
-    const output = JSON.parse(stdout);
-    expect(output).toHaveProperty("contentHash");
-    expect(output.schemaHash).toBe(stringHash);
+    const envelope = JSON.parse(stdout);
+    expect(envelope).toHaveProperty("type");
+    expect(envelope.value).toHaveProperty("contentHash");
+    expect(envelope.value.schemaHash).toBe(stringHash);
   });
 
   test("update existing template (idempotent)", async () => {
@@ -148,12 +150,12 @@ describe("template set", () => {
 
     expect(exitCode).toBe(0);
 
-    const output = JSON.parse(stdout);
-    expect(output).toHaveProperty("contentHash");
+    const envelope = JSON.parse(stdout);
+    expect(envelope.value).toHaveProperty("contentHash");
 
     // Verify we can get the new version
     const { stdout: getOut } = await runCli("template", "get", stringHash);
-    expect(getOut).toBe("Version 2");
+    expect(JSON.parse(getOut).value).toBe("Version 2");
   });
 
   test("error when file not found", async () => {
@@ -223,7 +225,7 @@ describe("template set", () => {
 
     // Verify content
     const { stdout: getOut } = await runCli("template", "get", stringHash);
-    expect(getOut).toBe(multilineContent);
+    expect(JSON.parse(getOut).value).toBe(multilineContent);
   });
 
   test("support empty templates", async () => {
@@ -240,8 +242,8 @@ describe("template set", () => {
 
     expect(exitCode).toBe(0);
 
-    const output = JSON.parse(stdout);
-    expect(output).toHaveProperty("contentHash");
+    const envelope = JSON.parse(stdout);
+    expect(envelope.value).toHaveProperty("contentHash");
   });
 
   test("error when neither file nor --inline provided", async () => {
@@ -271,12 +273,12 @@ describe("template set", () => {
 
     // Verify content preserved
     const { stdout: getOut } = await runCli("template", "get", stringHash);
-    expect(getOut).toBe(specialContent);
+    expect(JSON.parse(getOut).value).toBe(specialContent);
   });
 });
 
 describe("template get", () => {
-  test("retrieve template as raw text", async () => {
+  test("retrieve template as envelope value", async () => {
     const store = createFsStore(storePath);
     const stringHash = await getStringHash(store);
 
@@ -291,7 +293,9 @@ describe("template get", () => {
 
     expect(exitCode).toBe(0);
     expect(stderr).toBe("");
-    expect(stdout).toBe(content);
+    const envelope = JSON.parse(stdout);
+    expect(envelope).toHaveProperty("type");
+    expect(envelope.value).toBe(content);
   });
 
   test("error when template not found", async () => {
@@ -309,27 +313,26 @@ describe("template get", () => {
     const store = createFsStore(storePath);
     const stringHash = await getStringHash(store);
 
-    // Note: runCli helper trims stdout, so we test with content that doesn't have leading/trailing whitespace
-    // The actual CLI preserves whitespace correctly
+    // The envelope's value preserves exact whitespace (JSON-escaped),
+    // so trimming the surrounding JSON output is harmless.
     const content = "spaces\n\ttabs\t\nmixed";
     await runCli("template", "set", stringHash, "--inline", content);
 
     const { stdout } = await runCli("template", "get", stringHash);
 
-    expect(stdout).toBe(content);
+    expect(JSON.parse(stdout).value).toBe(content);
   });
 
   test("support multi-line templates", async () => {
     const store = createFsStore(storePath);
     const stringHash = await getStringHash(store);
 
-    // Note: runCli helper trims stdout, so trailing newline will be removed
     const multiline = "Line 1\nLine 2\nLine 3";
     await runCli("template", "set", stringHash, "--inline", multiline);
 
     const { stdout } = await runCli("template", "get", stringHash);
 
-    expect(stdout).toBe(multiline);
+    expect(JSON.parse(stdout).value).toBe(multiline);
   });
 });
 
@@ -346,34 +349,40 @@ describe("template list", () => {
 
     expect(exitCode).toBe(0);
 
-    const output = JSON.parse(stdout);
-    expect(Array.isArray(output)).toBe(true);
-    expect(output.length).toBeGreaterThanOrEqual(1);
+    const envelope = JSON.parse(stdout);
+    expect(envelope).toHaveProperty("type");
+    expect(Array.isArray(envelope.value)).toBe(true);
+    expect(envelope.value.length).toBeGreaterThanOrEqual(1);
 
     // Check structure
-    const item = output[0];
+    const item = envelope.value[0];
     expect(item).toHaveProperty("schemaHash");
-    expect(item).toHaveProperty("preview");
+    expect(item).toHaveProperty("contentHash");
   });
 
-  test("preview truncation for long content", async () => {
+  test("entry contentHash matches set result", async () => {
     const store = createFsStore(storePath);
     const stringHash = await getStringHash(store);
 
-    const longContent = "a".repeat(200);
-    await runCli("template", "set", stringHash, "--inline", longContent);
+    const { stdout: setOut } = await runCli(
+      "template",
+      "set",
+      stringHash,
+      "--inline",
+      "Some template content",
+    );
+    const { contentHash } = JSON.parse(setOut).value;
 
     const { stdout } = await runCli("template", "list");
 
-    const output = JSON.parse(stdout) as Array<{
+    const value = JSON.parse(stdout).value as Array<{
       schemaHash: string;
-      preview: string;
+      contentHash: string;
     }>;
-    const item = output.find((i) => i.schemaHash === stringHash);
+    const item = value.find((i) => i.schemaHash === stringHash);
     expect(item).toBeDefined();
     if (item) {
-      expect(item.preview.length).toBeLessThan(longContent.length);
-      expect(item.preview).toContain("...");
+      expect(item.contentHash).toBe(contentHash);
     }
   });
 
@@ -382,9 +391,9 @@ describe("template list", () => {
 
     expect(exitCode).toBe(0);
 
-    const output = JSON.parse(stdout);
-    expect(Array.isArray(output)).toBe(true);
-    expect(output.length).toBe(0);
+    const envelope = JSON.parse(stdout);
+    expect(Array.isArray(envelope.value)).toBe(true);
+    expect(envelope.value.length).toBe(0);
   });
 
   test("exclude non-template variables", async () => {
@@ -400,14 +409,14 @@ describe("template list", () => {
 
     const { stdout } = await runCli("template", "list");
 
-    const output = JSON.parse(stdout);
+    const envelope = JSON.parse(stdout);
     // Should only contain template variables
-    for (const item of output) {
+    for (const item of envelope.value) {
       expect(item.schemaHash).toBeDefined();
     }
   });
 
-  test("output JSON array format", async () => {
+  test("output JSON envelope with array value", async () => {
     const store = createFsStore(storePath);
     const stringHash = await getStringHash(store);
 
@@ -418,27 +427,8 @@ describe("template list", () => {
     // Should be valid JSON
     expect(() => JSON.parse(stdout)).not.toThrow();
 
-    const output = JSON.parse(stdout);
-    expect(Array.isArray(output)).toBe(true);
-  });
-
-  test("preview shows beginning of content", async () => {
-    const store = createFsStore(storePath);
-    const stringHash = await getStringHash(store);
-
-    const content = "Start of template...";
-    await runCli("template", "set", stringHash, "--inline", content);
-
-    const { stdout } = await runCli("template", "list");
-
-    const output = JSON.parse(stdout) as Array<{
-      schemaHash: string;
-      preview: string;
-    }>;
-    const item = output.find((i) => i.schemaHash === stringHash);
-    if (item) {
-      expect(item.preview).toContain("Start");
-    }
+    const envelope = JSON.parse(stdout);
+    expect(Array.isArray(envelope.value)).toBe(true);
   });
 });
 
@@ -458,9 +448,10 @@ describe("template delete", () => {
     expect(exitCode).toBe(0);
     expect(stderr).toBe("");
 
-    const output = JSON.parse(stdout);
-    expect(output).toHaveProperty("deleted");
-    expect(output.deleted).toBe(true);
+    const envelope = JSON.parse(stdout);
+    expect(envelope).toHaveProperty("type");
+    expect(envelope.value).toHaveProperty("deleted");
+    expect(envelope.value.deleted).toBe(true);
 
     // Verify template is gone
     const { exitCode: getExitCode } = await runCli(
@@ -495,13 +486,13 @@ describe("template delete", () => {
 
     // Verify second still exists
     const { stdout } = await runCli("template", "list");
-    const output = JSON.parse(stdout) as Array<{
+    const value = JSON.parse(stdout).value as Array<{
       schemaHash: string;
-      preview: string;
+      contentHash: string;
     }>;
 
     // Should not find deleted template
-    const deleted = output.find((i) => i.schemaHash === stringHash);
+    const deleted = value.find((i) => i.schemaHash === stringHash);
     expect(deleted).toBeUndefined();
   });
 
@@ -519,7 +510,7 @@ describe("template delete", () => {
       "--inline",
       "Content",
     );
-    const { contentHash } = JSON.parse(setOut);
+    const { contentHash } = JSON.parse(setOut).value;
 
     // Delete the template variable
     await runCli("template", "delete", stringHash);
@@ -577,7 +568,7 @@ describe("template integration", () => {
       stringHash,
     );
     expect(getExit).toBe(0);
-    expect(getOut).toBe(content);
+    expect(JSON.parse(getOut).value).toBe(content);
 
     // List
     const { stdout: listOut, exitCode: listExit } = await runCli(
@@ -585,7 +576,7 @@ describe("template integration", () => {
       "list",
     );
     expect(listExit).toBe(0);
-    const listData = JSON.parse(listOut);
+    const listData = JSON.parse(listOut).value;
     expect(listData.length).toBeGreaterThan(0);
 
     // Delete
@@ -626,8 +617,8 @@ describe("template integration", () => {
 
     // List should show all
     const { stdout } = await runCli("template", "list");
-    const output = JSON.parse(stdout);
-    expect(output.length).toBeGreaterThanOrEqual(1);
+    const value = JSON.parse(stdout).value;
+    expect(value.length).toBeGreaterThanOrEqual(1);
   });
 });
 

packages/json-cas-fs/CHANGELOG.md

@@ -1,5 +1,32 @@
 # @uncaged/json-cas-fs
 
+## 0.6.0
+
+### Minor Changes
+
+- Unified `{ type, value }` envelope output for all CLI commands (RFC [#67](https://github.com/uncaged/json-cas/issues/67)).
+
+  ### Breaking Changes
+
+  - Removed `init`, `bootstrap`, `cat`, `schema put/get/list/validate` commands
+  - All CLI command outputs now wrapped in `{ type, value }` envelope (except `render`)
+  - `openStore()` is now async and auto-bootstraps
+
+  ### New Features
+
+  - 18 `@output/*` schemas registered at bootstrap
+  - `list --type <hash-or-alias>` command (replaces `schema list`)
+  - `verify` now checks both hash integrity and schema validation
+  - `wrapEnvelope()` helper exported from `@uncaged/json-cas`
+  - `openStore()` in `@uncaged/json-cas-fs` — async, auto mkdir + bootstrap
+  - Default LiquidJS templates for all output schemas
+  - Pipe composition: any command output can be piped to `render -p`
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @uncaged/json-cas@0.6.0
+
 ## 0.5.3
 
 ### Patch Changes

packages/json-cas-fs/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uncaged/json-cas-fs",
-  "version": "0.5.3",
+  "version": "0.6.0",
   "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
@@ -16,10 +16,10 @@
   ],
   "scripts": {
     "test": "bun test",
-    "prepublishOnly": "echo '请用 bun run release 从根目录发版' && exit 1"
+    "prepublishOnly": "bash ../../scripts/check-workspace-deps.sh"
   },
   "dependencies": {
-    "@uncaged/json-cas": "^0.5.3",
+    "@uncaged/json-cas": "^0.6.0",
     "cborg": "^4.2.3"
   }
 }

packages/json-cas-fs/src/store.test.ts

@@ -65,7 +65,7 @@ describe("createFsStore – init and bootstrap", () => {
     const h2 = await bootstrap(store);
 
     expect(h1).toEqual(h2);
-    expect(store.listByType(h1["@schema"] ?? "")).toHaveLength(6);
+    expect(store.listByType(h1["@schema"] ?? "")).toHaveLength(24);
   });
 });
 

packages/json-cas/CHANGELOG.md

@@ -1,5 +1,27 @@
 # @uncaged/json-cas
 
+## 0.6.0
+
+### Minor Changes
+
+- Unified `{ type, value }` envelope output for all CLI commands (RFC [#67](https://github.com/uncaged/json-cas/issues/67)).
+
+  ### Breaking Changes
+
+  - Removed `init`, `bootstrap`, `cat`, `schema put/get/list/validate` commands
+  - All CLI command outputs now wrapped in `{ type, value }` envelope (except `render`)
+  - `openStore()` is now async and auto-bootstraps
+
+  ### New Features
+
+  - 18 `@output/*` schemas registered at bootstrap
+  - `list --type <hash-or-alias>` command (replaces `schema list`)
+  - `verify` now checks both hash integrity and schema validation
+  - `wrapEnvelope()` helper exported from `@uncaged/json-cas`
+  - `openStore()` in `@uncaged/json-cas-fs` — async, auto mkdir + bootstrap
+  - Default LiquidJS templates for all output schemas
+  - Pipe composition: any command output can be piped to `render -p`
+
 ## 0.5.3
 
 ### Patch Changes

packages/json-cas/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uncaged/json-cas",
-  "version": "0.5.3",
+  "version": "0.6.0",
   "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
@@ -16,7 +16,7 @@
   ],
   "scripts": {
     "test": "bun test",
-    "prepublishOnly": "echo '请用 bun run release 从根目录发版' && exit 1"
+    "prepublishOnly": "bash ../../scripts/check-workspace-deps.sh"
   },
   "dependencies": {
     "ajv": "^8.20.0",

packages/json-cas/src/bootstrap.test.ts

@@ -1,18 +1,40 @@
 import { describe, expect, test } from "bun:test";
 import { bootstrap } from "./bootstrap.js";
+import type { JSONSchema } from "./schema.js";
 import { getSchema } from "./schema.js";
 import { createMemoryStore } from "./store.js";
 
+const OUTPUT_ALIASES = [
+  "@output/put",
+  "@output/get",
+  "@output/has",
+  "@output/hash",
+  "@output/verify",
+  "@output/refs",
+  "@output/walk",
+  "@output/list",
+  "@output/var-set",
+  "@output/var-get",
+  "@output/var-delete",
+  "@output/var-tag",
+  "@output/var-list",
+  "@output/template-set",
+  "@output/template-get",
+  "@output/template-list",
+  "@output/template-delete",
+  "@output/gc",
+] as const;
+
 // ──────────────────────────────────────────────────────────────────────────────
 // Built-in Schema Registration Tests
 // ──────────────────────────────────────────────────────────────────────────────
 
 describe("bootstrap - Built-in Schemas", () => {
-  test("should return map of built-in schema aliases to hashes", async () => {
+  test("should return map of 24 built-in schema aliases to hashes", async () => {
     const store = createMemoryStore();
     const builtinSchemas = await bootstrap(store);
 
-    // Should return object with 6 aliases
+    // Should return object with 6 primitive + 18 output aliases = 24
     expect(builtinSchemas).toHaveProperty("@schema");
     expect(builtinSchemas).toHaveProperty("@string");
     expect(builtinSchemas).toHaveProperty("@number");
@@ -20,6 +42,12 @@ describe("bootstrap - Built-in Schemas", () => {
     expect(builtinSchemas).toHaveProperty("@array");
     expect(builtinSchemas).toHaveProperty("@bool");
 
+    for (const alias of OUTPUT_ALIASES) {
+      expect(builtinSchemas).toHaveProperty(alias);
+    }
+
+    expect(Object.keys(builtinSchemas)).toHaveLength(24);
+
     // All values should be valid hashes
     for (const [_alias, hash] of Object.entries(builtinSchemas)) {
       expect(typeof hash).toBe("string");
@@ -127,3 +155,164 @@ describe("bootstrap - Built-in Schemas", () => {
     }
   });
 });
+
+// ──────────────────────────────────────────────────────────────────────────────
+// @output/* Schema Registration Tests
+// ──────────────────────────────────────────────────────────────────────────────
+
+describe("bootstrap - @output/* Schemas", () => {
+  test("each @output/* schema has a title", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    for (const alias of OUTPUT_ALIASES) {
+      const hash = aliases[alias];
+      if (!hash) throw new Error(`${alias} not found`);
+
+      const schema = getSchema(store, hash) as JSONSchema;
+      expect(schema).not.toBeNull();
+      expect(typeof schema.title).toBe("string");
+      expect((schema.title as string).startsWith("ucas ")).toBe(true);
+    }
+  });
+
+  test("@output/put schema describes a cas_ref string", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/put"];
+    if (!hash) throw new Error("@output/put not found");
+
+    const schema = getSchema(store, hash);
+    expect(schema).toEqual({
+      type: "string",
+      format: "cas_ref",
+      title: "ucas put result",
+    });
+  });
+
+  test("@output/get schema describes object with type, payload, timestamp", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/get"];
+    if (!hash) throw new Error("@output/get not found");
+
+    const schema = getSchema(store, hash) as JSONSchema;
+    expect(schema.type).toBe("object");
+    expect(schema.title).toBe("ucas get result");
+
+    const props = schema.properties as Record<string, JSONSchema>;
+    expect(props.type).toEqual({ type: "string", format: "cas_ref" });
+    expect(props.payload).toEqual({});
+    expect(props.timestamp).toEqual({ type: "number" });
+  });
+
+  test("@output/has schema describes a boolean", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/has"];
+    if (!hash) throw new Error("@output/has not found");
+
+    expect(getSchema(store, hash)).toEqual({
+      type: "boolean",
+      title: "ucas has result",
+    });
+  });
+
+  test("@output/verify schema describes enum of ok|corrupted|invalid", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/verify"];
+    if (!hash) throw new Error("@output/verify not found");
+
+    const schema = getSchema(store, hash);
+    expect(schema).toEqual({
+      type: "string",
+      enum: ["ok", "corrupted", "invalid"],
+      title: "ucas verify result",
+    });
+  });
+
+  test("@output/refs schema describes array of cas_ref strings", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/refs"];
+    if (!hash) throw new Error("@output/refs not found");
+
+    expect(getSchema(store, hash)).toEqual({
+      type: "array",
+      items: { type: "string", format: "cas_ref" },
+      title: "ucas refs result",
+    });
+  });
+
+  test("@output/gc schema describes object with gc stats fields", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/gc"];
+    if (!hash) throw new Error("@output/gc not found");
+
+    const schema = getSchema(store, hash) as JSONSchema;
+    expect(schema.type).toBe("object");
+    expect(schema.title).toBe("ucas gc result");
+
+    const props = schema.properties as Record<string, JSONSchema>;
+    expect(props.total).toEqual({ type: "number" });
+    expect(props.reachable).toEqual({ type: "number" });
+    expect(props.collected).toEqual({ type: "number" });
+    expect(props.scanned).toEqual({ type: "number" });
+  });
+
+  test("@output/var-set schema describes a Variable object", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/var-set"];
+    if (!hash) throw new Error("@output/var-set not found");
+
+    const schema = getSchema(store, hash) as JSONSchema;
+    expect(schema.type).toBe("object");
+    expect(schema.title).toBe("ucas var set result");
+
+    const props = schema.properties as Record<string, JSONSchema>;
+    expect(props.name).toEqual({ type: "string" });
+    expect(props.schema).toEqual({ type: "string", format: "cas_ref" });
+    expect(props.value).toEqual({ type: "string", format: "cas_ref" });
+  });
+
+  test("@output/var-list schema describes array of Variable objects", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/var-list"];
+    if (!hash) throw new Error("@output/var-list not found");
+
+    const schema = getSchema(store, hash) as JSONSchema;
+    expect(schema.type).toBe("array");
+    expect(schema.title).toBe("ucas var list result");
+
+    const items = schema.items as JSONSchema;
+    expect(items.type).toBe("object");
+    const props = items.properties as Record<string, JSONSchema>;
+    expect(props.name).toEqual({ type: "string" });
+  });
+
+  test("@output/template-delete schema describes object with deleted boolean", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    const hash = aliases["@output/template-delete"];
+    if (!hash) throw new Error("@output/template-delete not found");
+
+    expect(getSchema(store, hash)).toEqual({
+      type: "object",
+      properties: { deleted: { type: "boolean" } },
+      title: "ucas template delete result",
+    });
+  });
+
+  test("all @output/* schemas are distinct hashes", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    const outputHashes = OUTPUT_ALIASES.map((alias) => aliases[alias]);
+    const uniqueHashes = new Set(outputHashes);
+    expect(uniqueHashes.size).toBe(OUTPUT_ALIASES.length);
+  });
+});

packages/json-cas/src/bootstrap.ts

@@ -60,12 +60,182 @@ const BOOTSTRAP_PAYLOAD = {
     enum: { type: "array" },
     const: {},
     description: { type: "string" },
+    // P1 leaf constraints
+    minimum: { type: "number" },
+    maximum: { type: "number" },
+    exclusiveMinimum: { type: "number" },
+    exclusiveMaximum: { type: "number" },
+    minLength: { type: "number" },
+    maxLength: { type: "number" },
+    pattern: { type: "string" },
+    minItems: { type: "number" },
+    maxItems: { type: "number" },
+    uniqueItems: { type: "boolean" },
   },
 } as const;
 
+const VARIABLE_PROPERTIES = {
+  name: { type: "string" },
+  schema: { type: "string", format: "cas_ref" },
+  value: { type: "string", format: "cas_ref" },
+  created: { type: "number" },
+  updated: { type: "number" },
+  tags: { type: "object" },
+  labels: { type: "array", items: { type: "string" } },
+} as const;
+
+const OUTPUT_SCHEMAS: ReadonlyArray<
+  readonly [alias: string, schema: Record<string, unknown>]
+> = [
+  [
+    "@output/put",
+    { type: "string", format: "cas_ref", title: "ucas put result" },
+  ],
+  [
+    "@output/get",
+    {
+      type: "object",
+      properties: {
+        type: { type: "string", format: "cas_ref" },
+        payload: {},
+        timestamp: { type: "number" },
+      },
+      title: "ucas get result",
+    },
+  ],
+  ["@output/has", { type: "boolean", title: "ucas has result" }],
+  [
+    "@output/hash",
+    { type: "string", format: "cas_ref", title: "ucas hash result" },
+  ],
+  [
+    "@output/verify",
+    {
+      type: "string",
+      enum: ["ok", "corrupted", "invalid"],
+      title: "ucas verify result",
+    },
+  ],
+  [
+    "@output/refs",
+    {
+      type: "array",
+      items: { type: "string", format: "cas_ref" },
+      title: "ucas refs result",
+    },
+  ],
+  [
+    "@output/walk",
+    {
+      type: "array",
+      items: { type: "string" },
+      title: "ucas walk result",
+    },
+  ],
+  [
+    "@output/list",
+    {
+      type: "array",
+      items: { type: "string", format: "cas_ref" },
+      title: "ucas list result",
+    },
+  ],
+  [
+    "@output/var-set",
+    {
+      type: "object",
+      properties: { ...VARIABLE_PROPERTIES },
+      title: "ucas var set result",
+    },
+  ],
+  [
+    "@output/var-get",
+    {
+      type: "object",
+      properties: { ...VARIABLE_PROPERTIES },
+      title: "ucas var get result",
+    },
+  ],
+  [
+    "@output/var-delete",
+    {
+      type: "object",
+      properties: { ...VARIABLE_PROPERTIES },
+      title: "ucas var delete result",
+    },
+  ],
+  [
+    "@output/var-tag",
+    {
+      type: "object",
+      properties: { ...VARIABLE_PROPERTIES },
+      title: "ucas var tag result",
+    },
+  ],
+  [
+    "@output/var-list",
+    {
+      type: "array",
+      items: { type: "object", properties: { ...VARIABLE_PROPERTIES } },
+      title: "ucas var list result",
+    },
+  ],
+  [
+    "@output/template-set",
+    {
+      type: "object",
+      properties: {
+        schemaHash: { type: "string", format: "cas_ref" },
+        contentHash: { type: "string", format: "cas_ref" },
+      },
+      title: "ucas template set result",
+    },
+  ],
+  [
+    "@output/template-get",
+    { type: "string", title: "ucas template get result" },
+  ],
+  [
+    "@output/template-list",
+    {
+      type: "array",
+      items: {
+        type: "object",
+        properties: {
+          schemaHash: { type: "string", format: "cas_ref" },
+          contentHash: { type: "string", format: "cas_ref" },
+        },
+      },
+      title: "ucas template list result",
+    },
+  ],
+  [
+    "@output/template-delete",
+    {
+      type: "object",
+      properties: { deleted: { type: "boolean" } },
+      title: "ucas template delete result",
+    },
+  ],
+  [
+    "@output/gc",
+    {
+      type: "object",
+      properties: {
+        total: { type: "number" },
+        reachable: { type: "number" },
+        collected: { type: "number" },
+        scanned: { type: "number" },
+      },
+      title: "ucas gc result",
+    },
+  ],
+];
+
 /**
  * Write the meta-schema seed node into the store and register built-in schemas.
- * The returned object contains aliases for the meta-schema and 5 primitive schemas.
+ * The returned object contains aliases for the meta-schema, 5 primitive schemas,
+ * and 18 @output/* schemas (24 total).
  * Idempotent: calling bootstrap multiple times returns the same hashes.
  */
 export async function bootstrap(store: Store): Promise<Record<string, Hash>> {
@@ -83,8 +253,8 @@ export async function bootstrap(store: Store): Promise<Record<string, Hash>> {
   const arrayHash = await store.put(metaHash, { type: "array" });
   const boolHash = await store.put(metaHash, { type: "boolean" });
 
-  // 3. Return map of aliases to hashes
-  return {
+  // 3. Register @output/* schemas
+  const aliases: Record<string, Hash> = {
     "@schema": metaHash,
     "@string": stringHash,
     "@number": numberHash,
@@ -92,4 +262,10 @@ export async function bootstrap(store: Store): Promise<Record<string, Hash>> {
     "@array": arrayHash,
     "@bool": boolHash,
   };
+
+  for (const [alias, schema] of OUTPUT_SCHEMAS) {
+    aliases[alias] = await store.put(metaHash, schema);
+  }
+
+  return aliases;
 }

packages/json-cas/src/index.test.ts

@@ -264,7 +264,7 @@ describe("bootstrap", () => {
     );
   });
 
-  test("returns a map with 6 built-in schema aliases", async () => {
+  test("returns a map with 24 built-in schema aliases", async () => {
     const store = createMemoryStore();
     const builtinSchemas = await bootstrap(store);
 
@@ -280,6 +280,8 @@ describe("bootstrap", () => {
       expect(hash).toHaveLength(13);
       expect(hash).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
     }
+
+    expect(Object.keys(builtinSchemas)).toHaveLength(24);
   });
 
   test("meta-schema node is stored and retrievable", async () => {
@@ -316,7 +318,7 @@ describe("bootstrap", () => {
     const h2 = await bootstrap(store);
 
     expect(h1).toEqual(h2);
-    // All 6 built-in schemas should be typed by the meta-schema
-    expect(store.listByType(h1["@schema"] ?? "")).toHaveLength(6);
+    // All 24 built-in schemas should be typed by the meta-schema
+    expect(store.listByType(h1["@schema"] ?? "")).toHaveLength(24);
   });
 });

packages/json-cas/src/index.ts

@@ -5,6 +5,7 @@ export { cborEncode } from "./cbor.js";
 export { type GcStats, gc } from "./gc.js";
 export { computeHash, computeSelfHash } from "./hash.js";
 export { renderWithTemplate } from "./liquid-render.js";
+export { registerOutputTemplates } from "./output-templates.js";
 export {
   type RenderOptions,
   render,
@@ -34,3 +35,4 @@ export {
   VariableStore,
 } from "./variable-store.js";
 export { verify } from "./verify.js";
+export { wrapEnvelope } from "./wrap-envelope.js";

packages/json-cas/src/output-templates.test.ts

@@ -0,0 +1,117 @@
+import { afterEach, describe, expect, test } from "bun:test";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { bootstrap } from "./bootstrap.js";
+import { registerOutputTemplates } from "./output-templates.js";
+import { createMemoryStore } from "./store.js";
+import type { Store } from "./types.js";
+import type { VariableStore } from "./variable-store.js";
+import { createVariableStore } from "./variable-store.js";
+
+const OUTPUT_ALIASES = [
+  "@output/put",
+  "@output/get",
+  "@output/has",
+  "@output/hash",
+  "@output/verify",
+  "@output/refs",
+  "@output/walk",
+  "@output/list",
+  "@output/var-set",
+  "@output/var-get",
+  "@output/var-delete",
+  "@output/var-tag",
+  "@output/var-list",
+  "@output/template-set",
+  "@output/template-get",
+  "@output/template-list",
+  "@output/template-delete",
+  "@output/gc",
+] as const;
+
+describe("registerOutputTemplates", () => {
+  let store: Store;
+  let varStore: VariableStore;
+  let tempDir: string;
+
+  afterEach(async () => {
+    varStore.close();
+    await rm(tempDir, { recursive: true });
+  });
+
+  test("registers a template for every @output/* schema", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "json-cas-tmpl-"));
+    store = createMemoryStore();
+    await bootstrap(store);
+    varStore = createVariableStore(join(tempDir, "vars.db"), store);
+
+    const registered = await registerOutputTemplates(store, varStore);
+
+    expect(Object.keys(registered)).toHaveLength(18);
+
+    for (const alias of OUTPUT_ALIASES) {
+      expect(registered).toHaveProperty(alias);
+    }
+  });
+
+  test("each template is retrievable via @ucas/template/text/<hash>", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "json-cas-tmpl-"));
+    store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    varStore = createVariableStore(join(tempDir, "vars.db"), store);
+
+    await registerOutputTemplates(store, varStore);
+
+    const stringHash = aliases["@string"];
+    if (!stringHash) throw new Error("@string not found");
+
+    for (const alias of OUTPUT_ALIASES) {
+      const schemaHash = aliases[alias];
+      if (!schemaHash) throw new Error(`${alias} not found`);
+
+      const varName = `@ucas/template/text/${schemaHash}`;
+      const variable = varStore.get(varName, stringHash);
+      if (variable === null) throw new Error(`Variable ${varName} not found`);
+
+      const templateNode = store.get(variable.value);
+      if (templateNode === null)
+        throw new Error(`Template node ${variable.value} not found`);
+      expect(typeof templateNode.payload).toBe("string");
+    }
+  });
+
+  test("is idempotent — safe to call multiple times", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "json-cas-tmpl-"));
+    store = createMemoryStore();
+    await bootstrap(store);
+    varStore = createVariableStore(join(tempDir, "vars.db"), store);
+
+    const first = await registerOutputTemplates(store, varStore);
+    const second = await registerOutputTemplates(store, varStore);
+
+    expect(first).toEqual(second);
+  });
+
+  test("@output/put template contains payload reference", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "json-cas-tmpl-"));
+    store = createMemoryStore();
+    const aliases = await bootstrap(store);
+    varStore = createVariableStore(join(tempDir, "vars.db"), store);
+
+    await registerOutputTemplates(store, varStore);
+
+    const putHash = aliases["@output/put"];
+    if (!putHash) throw new Error("@output/put not found");
+    const stringHash = aliases["@string"];
+    if (!stringHash) throw new Error("@string not found");
+
+    const variable = varStore.get(`@ucas/template/text/${putHash}`, stringHash);
+    if (variable === null)
+      throw new Error("@output/put template variable not found");
+
+    const templateNode = store.get(variable.value);
+    if (templateNode === null) throw new Error("Template node not found");
+    expect(templateNode.payload).toBe("{{ payload }}");
+  });
+});

packages/json-cas/src/output-templates.ts

@@ -0,0 +1,87 @@
+import { bootstrap } from "./bootstrap.js";
+import type { Hash, Store } from "./types.js";
+import type { VariableStore } from "./variable-store.js";
+
+const DEFAULT_TEMPLATES: ReadonlyArray<
+  readonly [alias: string, template: string]
+> = [
+  ["@output/put", "{{ payload }}"],
+  [
+    "@output/get",
+    "type: {{ payload.type }}\ntimestamp: {{ payload.timestamp }}",
+  ],
+  ["@output/has", "{{ payload }}"],
+  ["@output/hash", "{{ payload }}"],
+  ["@output/verify", "{{ payload }}"],
+  ["@output/refs", "{% for ref in payload %}{{ ref }}\n{% endfor %}"],
+  ["@output/walk", "{% for item in payload %}{{ item }}\n{% endfor %}"],
+  ["@output/list", "{% for item in payload %}{{ item }}\n{% endfor %}"],
+  [
+    "@output/var-set",
+    "name: {{ payload.name }}\nschema: {{ payload.schema }}\nvalue: {{ payload.value }}",
+  ],
+  [
+    "@output/var-get",
+    "name: {{ payload.name }}\nschema: {{ payload.schema }}\nvalue: {{ payload.value }}",
+  ],
+  [
+    "@output/var-delete",
+    "name: {{ payload.name }}\nschema: {{ payload.schema }}\nvalue: {{ payload.value }}",
+  ],
+  [
+    "@output/var-tag",
+    "name: {{ payload.name }}\nschema: {{ payload.schema }}\nvalue: {{ payload.value }}",
+  ],
+  [
+    "@output/var-list",
+    "{% for v in payload %}name: {{ v.name }}\nschema: {{ v.schema }}\nvalue: {{ v.value }}\n{% endfor %}",
+  ],
+  [
+    "@output/template-set",
+    "schemaHash: {{ payload.schemaHash }}\ncontentHash: {{ payload.contentHash }}",
+  ],
+  ["@output/template-get", "{{ payload }}"],
+  [
+    "@output/template-list",
+    "{% for t in payload %}schemaHash: {{ t.schemaHash }}\ncontentHash: {{ t.contentHash }}\n{% endfor %}",
+  ],
+  ["@output/template-delete", "deleted: {{ payload.deleted }}"],
+  [
+    "@output/gc",
+    "total: {{ payload.total }}\nreachable: {{ payload.reachable }}\ncollected: {{ payload.collected }}\nscanned: {{ payload.scanned }}",
+  ],
+];
+
+/**
+ * Register default LiquidJS templates for all @output/* schemas.
+ * Each template is stored as a @string CAS node and bound to
+ * the variable `@ucas/template/text/<schema-hash>`.
+ *
+ * Idempotent: safe to call multiple times.
+ */
+export async function registerOutputTemplates(
+  store: Store,
+  varStore: VariableStore,
+): Promise<Record<string, Hash>> {
+  const aliases = await bootstrap(store);
+  const stringHash = aliases["@string"];
+  if (stringHash === undefined) {
+    throw new Error("@string schema not found in bootstrap result");
+  }
+
+  const registered: Record<string, Hash> = {};
+
+  for (const [alias, template] of DEFAULT_TEMPLATES) {
+    const schemaHash = aliases[alias];
+    if (schemaHash === undefined) {
+      throw new Error(`Schema alias not found: ${alias}`);
+    }
+
+    const contentHash = await store.put(stringHash, template);
+    const varName = `@ucas/template/text/${schemaHash}`;
+    varStore.set(varName, contentHash);
+    registered[alias] = contentHash;
+  }
+
+  return registered;
+}

packages/json-cas/src/schema.test.ts

@@ -388,6 +388,107 @@ describe("bootstrap meta-schema self-reference", () => {
     expect(dataNode.type).not.toBe(metaHash);
   });
 
+  // ── P1 leaf constraints ──────────────────────────────────────────────────
+
+  test("accepts schema with numeric constraints (minimum/maximum)", async () => {
+    const store = createMemoryStore();
+    const hash = await putSchema(store, {
+      type: "number",
+      minimum: 0,
+      maximum: 100,
+      exclusiveMinimum: -1,
+      exclusiveMaximum: 101,
+    });
+    expect(hash).toHaveLength(13);
+
+    // validate a conforming payload
+    const nodeHash = await store.put(hash, 42);
+    const node = store.get(nodeHash) as CasNode;
+    expect(validate(store, node)).toBe(true);
+
+    // validate a non-conforming payload
+    const badHash = await store.put(hash, 200);
+    const badNode = store.get(badHash) as CasNode;
+    expect(validate(store, badNode)).toBe(false);
+  });
+
+  test("accepts schema with string constraints (minLength/maxLength/pattern)", async () => {
+    const store = createMemoryStore();
+    const hash = await putSchema(store, {
+      type: "string",
+      minLength: 1,
+      maxLength: 10,
+      pattern: "^[a-z]+$",
+    });
+    expect(hash).toHaveLength(13);
+
+    const goodHash = await store.put(hash, "hello");
+    expect(validate(store, store.get(goodHash) as CasNode)).toBe(true);
+
+    const badHash = await store.put(hash, "HELLO");
+    expect(validate(store, store.get(badHash) as CasNode)).toBe(false);
+  });
+
+  test("accepts schema with array constraints (minItems/maxItems/uniqueItems)", async () => {
+    const store = createMemoryStore();
+    const hash = await putSchema(store, {
+      type: "array",
+      items: { type: "number" },
+      minItems: 1,
+      maxItems: 3,
+      uniqueItems: true,
+    });
+    expect(hash).toHaveLength(13);
+
+    const goodHash = await store.put(hash, [1, 2, 3]);
+    expect(validate(store, store.get(goodHash) as CasNode)).toBe(true);
+
+    const tooMany = await store.put(hash, [1, 2, 3, 4]);
+    expect(validate(store, store.get(tooMany) as CasNode)).toBe(false);
+
+    const dupes = await store.put(hash, [1, 1]);
+    expect(validate(store, store.get(dupes) as CasNode)).toBe(false);
+  });
+
+  test("rejects schema with wrong constraint types", async () => {
+    const store = createMemoryStore();
+    await expect(
+      putSchema(store, { type: "number", minimum: "zero" } as never),
+    ).rejects.toThrow();
+    await expect(
+      putSchema(store, { type: "string", maxLength: true } as never),
+    ).rejects.toThrow();
+    await expect(
+      putSchema(store, { type: "array", uniqueItems: 1 } as never),
+    ).rejects.toThrow();
+  });
+
+  test("accepts schema with nested property constraints", async () => {
+    const store = createMemoryStore();
+    const hash = await putSchema(store, {
+      type: "object",
+      properties: {
+        name: { type: "string", minLength: 1, maxLength: 50 },
+        age: { type: "number", minimum: 0, maximum: 150 },
+        scores: {
+          type: "array",
+          items: { type: "number" },
+          minItems: 1,
+          uniqueItems: true,
+        },
+      },
+      required: ["name"],
+    });
+    expect(hash).toHaveLength(13);
+
+    const good = await store.put(hash, {
+      name: "Alice",
+      age: 30,
+      scores: [95, 87],
+    });
+    expect(validate(store, store.get(good) as CasNode)).toBe(true);
+  });
+
   test("bootstrap is idempotent across putSchema calls", async () => {
     const store = createMemoryStore();
     const builtinSchemas = await bootstrap(store);

packages/json-cas/src/schema.ts

@@ -35,6 +35,17 @@ const ALLOWED_SCHEMA_KEYS = new Set([
   "enum",
   "const",
   "description",
+  // P1 leaf constraints (no collectRefs impact)
+  "minimum",
+  "maximum",
+  "exclusiveMinimum",
+  "exclusiveMaximum",
+  "minLength",
+  "maxLength",
+  "pattern",
+  "minItems",
+  "maxItems",
+  "uniqueItems",
 ]);
 
 const JSON_SCHEMA_TYPES = new Set([
@@ -126,6 +137,29 @@ function isValidSchema(value: unknown): boolean {
     if (!Array.isArray(schema.enum) || schema.enum.length === 0) return false;
   }
 
+  // P1 leaf constraints — type checks only
+  if ("minimum" in schema && typeof schema.minimum !== "number") return false;
+  if ("maximum" in schema && typeof schema.maximum !== "number") return false;
+  if (
+    "exclusiveMinimum" in schema &&
+    typeof schema.exclusiveMinimum !== "number"
+  )
+    return false;
+  if (
+    "exclusiveMaximum" in schema &&
+    typeof schema.exclusiveMaximum !== "number"
+  )
+    return false;
+  if ("minLength" in schema && typeof schema.minLength !== "number")
+    return false;
+  if ("maxLength" in schema && typeof schema.maxLength !== "number")
+    return false;
+  if ("pattern" in schema && typeof schema.pattern !== "string") return false;
+  if ("minItems" in schema && typeof schema.minItems !== "number") return false;
+  if ("maxItems" in schema && typeof schema.maxItems !== "number") return false;
+  if ("uniqueItems" in schema && typeof schema.uniqueItems !== "boolean")
+    return false;
+
   return true;
 }
 

packages/json-cas/src/wrap-envelope.test.ts

@@ -0,0 +1,85 @@
+import { describe, expect, test } from "bun:test";
+import { bootstrap } from "./bootstrap.js";
+import { createMemoryStore } from "./store.js";
+import { wrapEnvelope } from "./wrap-envelope.js";
+
+describe("wrapEnvelope", () => {
+  test("resolves @output/put alias and returns envelope", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    const envelope = await wrapEnvelope(store, "@output/put", "AAAAAAAAAAAAA");
+
+    expect(envelope.type).toBe(aliases["@output/put"]);
+    expect(envelope.value).toBe("AAAAAAAAAAAAA");
+  });
+
+  test("resolves @output/has alias with boolean value", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    const envelope = await wrapEnvelope(store, "@output/has", true);
+
+    expect(envelope.type).toBe(aliases["@output/has"]);
+    expect(envelope.value).toBe(true);
+  });
+
+  test("resolves @output/gc alias with object value", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    const gcStats = { total: 100, reachable: 80, collected: 20, scanned: 5 };
+    const envelope = await wrapEnvelope(store, "@output/gc", gcStats);
+
+    expect(envelope.type).toBe(aliases["@output/gc"]);
+    expect(envelope.value).toEqual(gcStats);
+  });
+
+  test("resolves primitive alias @string", async () => {
+    const store = createMemoryStore();
+    const aliases = await bootstrap(store);
+
+    const envelope = await wrapEnvelope(store, "@string", "hello");
+
+    expect(envelope.type).toBe(aliases["@string"]);
+    expect(envelope.value).toBe("hello");
+  });
+
+  test("throws for unknown alias", async () => {
+    const store = createMemoryStore();
+    await bootstrap(store);
+
+    await expect(
+      wrapEnvelope(store, "@output/nonexistent", "value"),
+    ).rejects.toThrow("Unknown schema alias: @output/nonexistent");
+  });
+
+  test("is idempotent — same alias returns same type hash", async () => {
+    const store = createMemoryStore();
+
+    const first = await wrapEnvelope(store, "@output/verify", "ok");
+    const second = await wrapEnvelope(store, "@output/verify", "corrupted");
+
+    expect(first.type).toBe(second.type);
+    expect(first.value).toBe("ok");
+    expect(second.value).toBe("corrupted");
+  });
+
+  test("preserves complex object values without mutation", async () => {
+    const store = createMemoryStore();
+    await bootstrap(store);
+
+    const original = {
+      name: "test",
+      schema: "AAAAAAAAAAAAA",
+      value: "BBBBBBBBBBBBB",
+      created: 1000,
+      updated: 2000,
+      tags: { env: "prod" },
+      labels: ["stable"],
+    };
+    const envelope = await wrapEnvelope(store, "@output/var-set", original);
+
+    expect(envelope.value).toEqual(original);
+  });
+});

packages/json-cas/src/wrap-envelope.ts

@@ -0,0 +1,19 @@
+import { bootstrap } from "./bootstrap.js";
+import type { Hash, Store } from "./types.js";
+
+/**
+ * Resolve a schema alias (e.g. "@output/put") to its hash via bootstrap,
+ * then return a typed envelope ready for store.put() or direct rendering.
+ */
+export async function wrapEnvelope(
+  store: Store,
+  schemaAlias: string,
+  value: unknown,
+): Promise<{ type: Hash; value: unknown }> {
+  const aliases = await bootstrap(store);
+  const typeHash = aliases[schemaAlias];
+  if (typeHash === undefined) {
+    throw new Error(`Unknown schema alias: ${schemaAlias}`);
+  }
+  return { type: typeHash, value };
+}

scripts/check-workspace-deps.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Prevent publishing packages that still reference workspace:* dependencies
+if grep -q '"workspace:' package.json 2>/dev/null; then
+  echo "❌ Found workspace:* dependencies in package.json — cannot publish directly."
+  echo "   Use 'changeset publish' which resolves workspace protocol automatically."
+  grep '"workspace:' package.json
+  exit 1
+fi