diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a03488..2036dcb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- **`memory` listing type**: `positronick memory search|list|show|install` — platform LISTING_TYPES
+- **Listing categories**: Memory and Observability on admin validation
 - **`positronick research`**: the agent-facing "what's new" feed over positronick.com's published blog posts, mirrored GitHub releases, and mirrored news links — newest first, so agents avoid stale knowledge. Filter with `--kind` (article/release/link), `--category`, `--tag`, or a free-text query, and poll just the delta with `--since <iso>`; the printed `latest` timestamp is the value to pass back next time. Read-only and unauthenticated, like the soul/listing reads. Backed by the public `GET /api/research` endpoint.
 - **`positronick blog`**: read the positronick.com blog from the terminal — `blog list` (newest first, optional `--kind` article/release/link) and `blog show <slug>`, with `--raw` printing the markdown body verbatim and did-you-mean hints (exit 3) on a missing slug. Read-only and unauthenticated, mirroring the soul/listing reads. Backed by the public `GET /api/blog`, `/api/blog/{slug}`, and `/api/blog/{slug}.md` endpoints.
 - **`positronick feed` (admin)**: manage the blog feed sources (GitHub release / RSS mirroring) the ingestor polls — `feed list`, `feed create --label <l> --feed-url <u> --kind github_release|rss --category <c>` (`--author`/`--listing` attribution, repeatable `--tag`, `--auto-publish`, `--enabled`), `feed update <id>` (`--enabled=false` pauses a feed — there is no delete verb), and `feed sync <id>` (ingest one feed now, surfacing the fetch summary; a fetch/parse failure maps the API's 502 to a clear error). Backed by the `/api/admin/feeds` API. Ingesting every feed on a schedule stays the cron's job — no CLI subcommand carries that admin key.
diff --git a/README.md b/README.md
index 56921f8..7dafeb1 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Positronick CLI
 
-`positronick` discovers and installs agent capabilities — souls, harnesses, CLIs, MCP servers, agents, skills, plugins, and loops — from [positronick.com](https://positronick.com).
+`positronick` discovers and installs agent capabilities — souls, harnesses, CLIs, MCP servers, memory, agents, skills, plugins, and loops — from [positronick.com](https://positronick.com).
 
 ## Install
 
@@ -38,6 +38,7 @@ yay -S positronick-bin                            # Arch (AUR)
 | `positronick harness search\|show\|list\|install` | Agent harnesses | available |
 | `positronick cli search\|show\|list\|install` | CLI tools | available |
 | `positronick mcp search\|show\|list\|install` | MCP servers | available |
+| `positronick memory search\|show\|list\|install` | Memory and context engines | available |
 | `positronick agent search\|show\|list\|install` | Agents | available |
 | `positronick skill search\|show\|list\|install` | Skills | available |
 | `positronick plugin search\|show\|list\|install` | Plugins | available |
diff --git a/internal/api/types.go b/internal/api/types.go
index 2ef1775..9e2db7b 100644
--- a/internal/api/types.go
+++ b/internal/api/types.go
@@ -19,7 +19,14 @@ import (
 
 // ListingTypes are the kinds of official tooling the registry catalogs.
 // Mirrors LISTING_TYPES in src/lib/types.ts.
-var ListingTypes = []string{"harness", "cli", "mcp", "agent", "skill", "plugin", "loop"}
+var ListingTypes = []string{"harness", "cli", "mcp", "memory", "agent", "skill", "plugin", "loop"}
+
+// ListingCategories are the broad subject labels a listing may use.
+// Mirrors LISTING_CATEGORIES in src/lib/types.ts.
+var ListingCategories = []string{
+	"AI/ML", "Memory", "Observability", "DevOps", "Cloud", "Web",
+	"Data", "Security", "Technical", "Productivity",
+}
 
 // FeedKinds are the kinds of blog feed source the ingestor mirrors. Mirrors
 // FEED_KINDS in src/lib/server/feedFields.ts.
diff --git a/internal/api/types_test.go b/internal/api/types_test.go
index 47750cc..f65c056 100644
--- a/internal/api/types_test.go
+++ b/internal/api/types_test.go
@@ -167,3 +167,25 @@ func TestNewWireFieldsRoundTrip(t *testing.T) {
 		t.Errorf("SoulCard.ChargeCount = %d, want 5", s.ChargeCount)
 	}
 }
+
+// Platform LISTING_TYPES order is a public contract: the CLI auto-registers one
+// cobra noun per entry, skill_contract pins the joined list, and MCP type enums
+// derive from it. Keep this in lockstep with src/lib/types.ts.
+func TestListingTypesMatchPlatformOrder(t *testing.T) {
+	want := []string{"harness", "cli", "mcp", "memory", "agent", "skill", "plugin", "loop"}
+	if !reflect.DeepEqual(ListingTypes, want) {
+		t.Fatalf("ListingTypes = %#v\nwant %#v", ListingTypes, want)
+	}
+}
+
+// Platform LISTING_CATEGORIES order is a public contract: mockadmin validation
+// and any future UI filters must accept exactly these labels.
+func TestListingCategoriesMatchPlatformOrder(t *testing.T) {
+	want := []string{
+		"AI/ML", "Memory", "Observability", "DevOps", "Cloud", "Web",
+		"Data", "Security", "Technical", "Productivity",
+	}
+	if !reflect.DeepEqual(ListingCategories, want) {
+		t.Fatalf("ListingCategories = %#v\nwant %#v", ListingCategories, want)
+	}
+}
diff --git a/internal/cli/admin.go b/internal/cli/admin.go
index 033fcba..c30e55f 100644
--- a/internal/cli/admin.go
+++ b/internal/cli/admin.go
@@ -493,8 +493,8 @@ func newListingCmd() *cobra.Command {
 	cmd := markAdmin(&cobra.Command{
 		Use:   "listing",
 		Short: "Create and update registry listings (admin)",
-		Long: "Write access to registry listings of any type — the public type nouns (harness, " +
-			"cli, mcp, agent, skill, plugin, loop) stay read-only. Listings are authored by an " +
+		Long: "Write access to registry listings of any type — the public type nouns (" +
+			strings.Join(api.ListingTypes, ", ") + ") stay read-only. Listings are authored by an " +
 			"existing profile handle; profiles themselves stay git-curated." + adminNote,
 	})
 	cmd.AddCommand(newListingCreateCmd(), newListingUpdateCmd())
diff --git a/internal/cli/agentdocs.go b/internal/cli/agentdocs.go
index 5fb2970..fdd4549 100644
--- a/internal/cli/agentdocs.go
+++ b/internal/cli/agentdocs.go
@@ -43,7 +43,7 @@ var exitCodeMeanings = map[string]string{
 
 const agentDocsIntro = "`positronick` is the command-line client for positronick.com. It discovers agent " +
 	"capabilities: souls (installable SOUL.md personality files), a registry of official " +
-	"tooling (harnesses, CLIs, MCP servers, agents, skills, plugins, loops), and a `research` " +
+	"tooling (harnesses, CLIs, MCP servers, memory, agents, skills, plugins, loops), and a `research` " +
 	"feed of what's new (articles, releases, links) so agents avoid stale knowledge. It is built to be " +
 	"driven by coding agents — pass `--json` to any command for stable machine-readable JSON on " +
 	"stdout, read progress and errors from stderr, and branch on the exit code. Read commands " +
diff --git a/internal/cli/install.go b/internal/cli/install.go
index ac633bb..563728d 100644
--- a/internal/cli/install.go
+++ b/internal/cli/install.go
@@ -27,7 +27,7 @@ func attachInstallCommands(root *cobra.Command) {
 			c.AddCommand(newSoulInstallCmd())
 		case "loop":
 			c.AddCommand(newLoopInstallCmd())
-		case "harness", "cli", "mcp", "agent", "skill", "plugin":
+		case "harness", "cli", "mcp", "memory", "agent", "skill", "plugin":
 			c.AddCommand(newListingInstallCmd(c.Name()))
 		}
 	}
diff --git a/internal/cli/listing.go b/internal/cli/listing.go
index 2979d6c..7245f91 100644
--- a/internal/cli/listing.go
+++ b/internal/cli/listing.go
@@ -33,23 +33,29 @@ type listingDetail struct {
 }
 
 // listingNounShorts gives each registry noun its own help line.
+// Keys mirror api.ListingTypes (harness, cli, mcp, memory, agent, skill, plugin, loop).
 var listingNounShorts = map[string]string{
 	"harness": "Discover agent harnesses in the registry",
 	"cli":     "Discover official CLI tools in the registry",
 	"mcp":     "Discover MCP servers in the registry",
+	"memory":  "Discover memory and context engines in the registry",
 	"agent":   "Discover agent SDKs and frameworks in the registry",
 	"skill":   "Discover agent skills in the registry",
 	"plugin":  "Discover agent plugins in the registry",
 	"loop":    "Discover reusable agent loops in the registry",
 }
 
-// newListingNounCmd builds one registry noun (harness, cli, mcp, agent,
-// skill, plugin, loop) with the shared search/list/show verbs, each scoped to
-// its listing type via ?type= on the API.
+// newListingNounCmd builds one registry noun from api.ListingTypes with the
+// shared search/list/show verbs, each scoped to its listing type via ?type=
+// on the API.
 func newListingNounCmd(listingType string) *cobra.Command {
+	short := listingNounShorts[listingType]
+	if short == "" {
+		short = fmt.Sprintf("Discover %s listings in the registry", listingType)
+	}
 	cmd := &cobra.Command{
 		Use:   listingType,
-		Short: listingNounShorts[listingType],
+		Short: short,
 	}
 	cmd.AddCommand(
 		newListingSearchCmd(listingType),
diff --git a/internal/cli/testdata/golden/agent-docs.json b/internal/cli/testdata/golden/agent-docs.json
index 027dfff..0bc93a8 100644
--- a/internal/cli/testdata/golden/agent-docs.json
+++ b/internal/cli/testdata/golden/agent-docs.json
@@ -589,6 +589,81 @@
       "description": "Show one mcp listing in full",
       "flags": []
     },
+    {
+      "path": "positronick memory",
+      "use": "positronick memory [flags]",
+      "description": "Discover memory and context engines in the registry",
+      "flags": []
+    },
+    {
+      "path": "positronick memory install",
+      "use": "positronick memory install \u003cslug\u003e [flags]",
+      "description": "Print (or run with --run) the official install command for one memory",
+      "flags": [
+        {
+          "name": "run",
+          "shorthand": "",
+          "usage": "execute the install command via `sh -c` instead of printing it",
+          "default": "false"
+        }
+      ]
+    },
+    {
+      "path": "positronick memory list",
+      "use": "positronick memory list [flags]",
+      "description": "List all memory listings",
+      "flags": [
+        {
+          "name": "category",
+          "shorthand": "",
+          "usage": "only results in this category (case-insensitive)",
+          "default": ""
+        },
+        {
+          "name": "limit",
+          "shorthand": "",
+          "usage": "maximum number of results",
+          "default": "20"
+        },
+        {
+          "name": "sort",
+          "shorthand": "",
+          "usage": "sort order: relevance, name, downloads or newest",
+          "default": "name"
+        }
+      ]
+    },
+    {
+      "path": "positronick memory search",
+      "use": "positronick memory search \u003cquery\u003e [flags]",
+      "description": "Search memory listings by fuzzy relevance",
+      "flags": [
+        {
+          "name": "category",
+          "shorthand": "",
+          "usage": "only results in this category (case-insensitive)",
+          "default": ""
+        },
+        {
+          "name": "limit",
+          "shorthand": "",
+          "usage": "maximum number of results",
+          "default": "20"
+        },
+        {
+          "name": "sort",
+          "shorthand": "",
+          "usage": "sort order: relevance, name, downloads or newest",
+          "default": "relevance"
+        }
+      ]
+    },
+    {
+      "path": "positronick memory show",
+      "use": "positronick memory show \u003cslug\u003e [flags]",
+      "description": "Show one memory listing in full",
+      "flags": []
+    },
     {
       "path": "positronick plugin",
       "use": "positronick plugin [flags]",
diff --git a/internal/cli/testdata/golden/agent-docs.txt b/internal/cli/testdata/golden/agent-docs.txt
index 5235a86..5adab68 100644
--- a/internal/cli/testdata/golden/agent-docs.txt
+++ b/internal/cli/testdata/golden/agent-docs.txt
@@ -1,6 +1,6 @@
 # positronick — agent manual
 
-`positronick` is the command-line client for positronick.com. It discovers agent capabilities: souls (installable SOUL.md personality files), a registry of official tooling (harnesses, CLIs, MCP servers, agents, skills, plugins, loops), and a `research` feed of what's new (articles, releases, links) so agents avoid stale knowledge. It is built to be driven by coding agents — pass `--json` to any command for stable machine-readable JSON on stdout, read progress and errors from stderr, and branch on the exit code. Read commands never prompt. Hidden admin commands (create/update for souls and listings, create/list for profiles, list/create/update/sync for blog feed sources, and create/update/list for blog posts) exist and appear in help and in these docs after logging in with an admin account.
+`positronick` is the command-line client for positronick.com. It discovers agent capabilities: souls (installable SOUL.md personality files), a registry of official tooling (harnesses, CLIs, MCP servers, memory, agents, skills, plugins, loops), and a `research` feed of what's new (articles, releases, links) so agents avoid stale knowledge. It is built to be driven by coding agents — pass `--json` to any command for stable machine-readable JSON on stdout, read progress and errors from stderr, and branch on the exit code. Read commands never prompt. Hidden admin commands (create/update for souls and listings, create/list for profiles, list/create/update/sync for blog feed sources, and create/update/list for blog posts) exist and appear in help and in these docs after logging in with an admin account.
 
 Exit codes:
 
@@ -404,6 +404,52 @@ Usage: `positronick mcp show <slug> [flags]`
 
 Show one mcp listing in full
 
+## positronick memory
+
+Usage: `positronick memory [flags]`
+
+Discover memory and context engines in the registry
+
+## positronick memory install
+
+Usage: `positronick memory install <slug> [flags]`
+
+Print (or run with --run) the official install command for one memory
+
+Flags:
+
+- `--run` (default `false`): execute the install command via `sh -c` instead of printing it
+
+## positronick memory list
+
+Usage: `positronick memory list [flags]`
+
+List all memory listings
+
+Flags:
+
+- `--category` (default ``): only results in this category (case-insensitive)
+- `--limit` (default `20`): maximum number of results
+- `--sort` (default `name`): sort order: relevance, name, downloads or newest
+
+## positronick memory search
+
+Usage: `positronick memory search <query> [flags]`
+
+Search memory listings by fuzzy relevance
+
+Flags:
+
+- `--category` (default ``): only results in this category (case-insensitive)
+- `--limit` (default `20`): maximum number of results
+- `--sort` (default `relevance`): sort order: relevance, name, downloads or newest
+
+## positronick memory show
+
+Usage: `positronick memory show <slug> [flags]`
+
+Show one memory listing in full
+
 ## positronick plugin
 
 Usage: `positronick plugin [flags]`
diff --git a/internal/cli/testdata/golden/mcp-tools-list.json b/internal/cli/testdata/golden/mcp-tools-list.json
index 9b87f10..7a391aa 100644
--- a/internal/cli/testdata/golden/mcp-tools-list.json
+++ b/internal/cli/testdata/golden/mcp-tools-list.json
@@ -1,6 +1,6 @@
 [
   {
-    "description": "Search positronick.com's registry of verified agent tooling — harnesses, CLIs, MCP servers, agent SDKs, skills, plugins and loops — ranked by fuzzy relevance. Follow up with listing_show for the full record.",
+    "description": "Search positronick.com's registry of verified agent tooling — harnesses, CLIs, MCP servers, memory, agent SDKs, skills, plugins and loops — ranked by fuzzy relevance. Follow up with listing_show for the full record.",
     "inputSchema": {
       "additionalProperties": false,
       "properties": {
@@ -24,6 +24,7 @@
             "harness",
             "cli",
             "mcp",
+            "memory",
             "agent",
             "skill",
             "plugin",
diff --git a/internal/mcpserver/instructions.go b/internal/mcpserver/instructions.go
index 0e1d390..71c726b 100644
--- a/internal/mcpserver/instructions.go
+++ b/internal/mcpserver/instructions.go
@@ -10,7 +10,7 @@ const serverInstructions = `positronick is the registry of agent capabilities on
 
 Souls are installable SOUL.md personality files: soul_search → soul_show →
 soul_install. The wider registry of verified tooling (harnesses, CLIs, MCP
-servers, agents, skills, plugins, loops): listing_search → listing_show.
+servers, memory, agents, skills, plugins, loops): listing_search → listing_show.
 
 Search results are slim cards; always fetch the full record with the _show
 tool before acting on an entry. soul_install has side effects — it counts
diff --git a/internal/mcpserver/listings.go b/internal/mcpserver/listings.go
index d7a2fc8..2c10315 100644
--- a/internal/mcpserver/listings.go
+++ b/internal/mcpserver/listings.go
@@ -54,7 +54,7 @@ func addListingTools(srv *mcp.Server, opts Options) {
 	mcp.AddTool(srv, &mcp.Tool{
 		Name: "listing_search",
 		Description: "Search positronick.com's registry of verified agent tooling — harnesses, " +
-			"CLIs, MCP servers, agent SDKs, skills, plugins and loops — ranked by fuzzy " +
+			"CLIs, MCP servers, memory, agent SDKs, skills, plugins and loops — ranked by fuzzy " +
 			"relevance. Follow up with listing_show for the full record.",
 		InputSchema: inputSchema[listingSearchIn](func(s *jsonschema.Schema) {
 			s.Properties["type"].Enum = enumOf(api.ListingTypes)
diff --git a/internal/mockapi/admin.go b/internal/mockapi/admin.go
index 7ffada7..a075edd 100644
--- a/internal/mockapi/admin.go
+++ b/internal/mockapi/admin.go
@@ -41,10 +41,12 @@ const (
 )
 
 // Enum fixtures mirroring src/lib/types.ts in the product repo.
+// Listing categories come from api.ListingCategories so mockadmin validation
+// stays in lockstep with the platform LISTING_CATEGORIES contract.
 var (
 	soulCategories    = []string{"Technical", "Professional", "Creative", "Educational", "Wellness", "Research", "Experimental", "Playful"}
 	soulFrameworks    = []string{"hermes", "openclaw", "claude-code", "cursor"}
-	listingCategories = []string{"AI/ML", "DevOps", "Cloud", "Web", "Data", "Security", "Technical", "Productivity"}
+	listingCategories = api.ListingCategories
 	statuses          = []string{"draft", "pending", "published"}
 )
 
diff --git a/skills/positronick/SKILL.md b/skills/positronick/SKILL.md
index 72960c5..156330b 100644
--- a/skills/positronick/SKILL.md
+++ b/skills/positronick/SKILL.md
@@ -2,8 +2,8 @@
 name: positronick
 description: >-
   Discover and install agent capabilities from the positronick.com registry —
-  souls (SOUL.md personality files), harnesses, CLIs, MCP servers, agents,
-  skills, plugins, and loops. Use when asked to find or install a soul or
+  souls (SOUL.md personality files), harnesses, CLIs, MCP servers, memory,
+  agents, skills, plugins, and loops. Use when asked to find or install a soul or
   SOUL.md, browse positronick listings, set up a loop recipe, or whenever the
   positronick MCP tools or `positronick` CLI are available and the task
   involves agent tooling discovery.
@@ -48,7 +48,7 @@ Souls are installable SOUL.md personality files for coding agents.
 ## Registry listings: search → show
 
 Everything else is a listing with one of these types: `harness`, `cli`,
-`mcp`, `agent`, `skill`, `plugin`, `loop`.
+`mcp`, `memory`, `agent`, `skill`, `plugin`, `loop`.
 
 1. `listing_search` — scope with `type`, filter with `category`. Cards carry
    the official `installCmd` and verified `sourceUrl`.