diff --git a/Makefile b/Makefile
index 8c75263..38b8292 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,8 @@ MANIFESTS := \
 	plugins/zero/.claude-plugin/plugin.json \
 	plugins/zero/.codex-plugin/plugin.json \
 	plugins/zero/.factory-plugin/plugin.json \
-	plugins/zero-gemini/gemini-extension.json
+	plugins/zero-gemini/gemini-extension.json \
+	plugins/zero-roo/manifest.json
 
 # The manifest read for the current version (all of MANIFESTS stay in lockstep).
 VERSION_SOURCE := plugins/zero/.claude-plugin/plugin.json
diff --git a/README.md b/README.md
index ce4d9fb..7d54a0c 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@ installation, use the guides below. Pick your agent:
 - **[Codex app](guides/codex-app.md)**
 - **[Droid](guides/droid.md)**
 - **[Gemini CLI](guides/gemini-cli.md)**
+- **[Roo Code](guides/roo-code.md)**
 - **[Anything else (standalone installer)](guides/generic.md)** — works in any
   agent with a shell (and for humans at a terminal)
 
@@ -73,5 +74,5 @@ mechanics — live in the per-host guides.
 ## Status
 
 This repo is built up iteratively, one carefully reviewed PR at a time. Today
-it ships the **Claude Code**, **Codex**, **Droid**, and **Gemini CLI** plugins;
-additional hosts (Cursor) will land in subsequent PRs.
+it ships the **Claude Code**, **Codex**, **Droid**, **Gemini CLI**, and
+**Roo Code** plugins; additional hosts will land in subsequent PRs.
diff --git a/guides/roo-code.md b/guides/roo-code.md
new file mode 100644
index 0000000..40c0b89
--- /dev/null
+++ b/guides/roo-code.md
@@ -0,0 +1,52 @@
+# Zero for Roo Code
+
+How to install Zero in Roo Code and keep it up to date.
+
+## Install
+
+### Inside Roo Code
+
+Install the Zero runtime once:
+
+```bash
+curl -fsSL https://zero.xyz/install.sh | bash
+```
+
+Build the Roo adapter from this repository, then copy it into your project:
+
+```bash
+scripts/build-roo.sh
+cp -R dist/zero-roo/. /path/to/your/project/
+```
+
+Open the project in VS Code with Roo Code installed, then:
+
+1. Open Roo Code's MCP settings and confirm the `zero` server from
+   `.roo/mcp.json`.
+2. Confirm MCP servers are enabled.
+3. Use `/zero` or ask Roo: *"Help me set up and test Zero."*
+
+If Roo Code prompts to approve MCP tools, keep paid or state-changing tools
+confirmation-gated. The adapter leaves `alwaysAllow` empty by default.
+
+### From the terminal
+
+```bash
+curl -fsSL https://zero.xyz/install.sh | bash
+scripts/build-roo.sh
+cp -R dist/zero-roo/. /path/to/your/project/
+```
+
+Restart VS Code if Roo does not pick up the new project files immediately, then
+ask Roo: *"Help me set up and test Zero."*
+
+## Staying up to date
+
+Roo Code does not currently provide lifecycle hooks for this adapter. To update
+Zero, re-run:
+
+```bash
+curl -fsSL https://zero.xyz/install.sh | bash
+scripts/build-roo.sh
+cp -R dist/zero-roo/. /path/to/your/project/
+```
diff --git a/plugins/zero-gemini/gemini-extension.json b/plugins/zero-gemini/gemini-extension.json
index 69ea920..ac48f52 100644
--- a/plugins/zero-gemini/gemini-extension.json
+++ b/plugins/zero-gemini/gemini-extension.json
@@ -1,6 +1,6 @@
 {
   "name": "zero",
-  "version": "1.3.3",
+  "version": "1.4.0",
   "description": "Discover and call paid AI capabilities (x402 / MPP) with automatic, wallet-backed payment. Search a live index of external services — image/video/audio generation, web scraping, data enrichment, real-time data, messaging — then call them and pay per use. Bundles the 'zero' skill and the Zero MCP connector.",
   "mcpServers": {
     "zero": {
diff --git a/plugins/zero-roo/README.md b/plugins/zero-roo/README.md
new file mode 100644
index 0000000..c8d1b68
--- /dev/null
+++ b/plugins/zero-roo/README.md
@@ -0,0 +1,37 @@
+# zero-roo (overlay - not directly installable)
+
+This directory is **not** a complete Roo Code project adapter on its own. It
+holds the Roo-specific files:
+
+- `manifest.json` - versioned release marker for this adapter
+- `roo/mcp.json` - project-level MCP configuration for `https://mcp.zero.xyz`
+- `roo/commands/zero.md` - `/zero` command instructions
+- `roo/rules/zero.md` - project rule that tells Roo Zero is available
+- `roo/marketplace-mcp.json` - exact Zero MCP payload for a future Roo
+  Marketplace listing
+
+The `zero` skill is copied from [`../zero/`](../zero/) during packaging so Roo
+receives the same skill body as the other hosts.
+
+## How the adapter is built
+
+Roo reads project skills from `.roo/skills/` and `.agents/skills/`, project MCP
+servers from `.roo/mcp.json`, project rules from `.roo/rules/`, and project
+commands from `.roo/commands/`. `scripts/build-roo.sh` assembles those pieces
+into `dist/zero-roo/`:
+
+```
+dist/zero-roo/
+  ├── .agents/skills/zero/SKILL.md
+  ├── .roo/commands/zero.md
+  ├── .roo/mcp.json
+  ├── .roo/rules/zero.md
+  ├── .roo/skills/zero/SKILL.md
+  ├── manifest.json
+  └── roo/marketplace-mcp.json
+```
+
+Roo has no documented lifecycle hooks, so this adapter does not auto-provision
+or auto-update the runner. Users install the shared Zero CLI/runtime with the
+standalone installer and refresh project files by rebuilding/copying the
+adapter.
diff --git a/plugins/zero-roo/manifest.json b/plugins/zero-roo/manifest.json
new file mode 100644
index 0000000..13f257a
--- /dev/null
+++ b/plugins/zero-roo/manifest.json
@@ -0,0 +1,8 @@
+{
+  "name": "zero-roo",
+  "version": "1.4.0",
+  "description": "Roo Code adapter for Zero: project skills, remote MCP configuration, rules, and slash command template.",
+  "homepage": "https://zero.xyz",
+  "repository": "https://github.com/officialzeroxyz/zero-plugins",
+  "license": "MIT"
+}
diff --git a/plugins/zero-roo/roo/commands/zero.md b/plugins/zero-roo/roo/commands/zero.md
new file mode 100644
index 0000000..ebb0df4
--- /dev/null
+++ b/plugins/zero-roo/roo/commands/zero.md
@@ -0,0 +1,16 @@
+---
+description: Use Zero to find and call an external capability
+argument-hint: <capability request>
+---
+
+Use the Zero skill to handle this request.
+
+1. Resolve the `zero` runner.
+2. Search for the requested capability with `zero search`.
+3. Inspect the chosen result with `zero get`.
+4. Explain any cost and get confirmation before `zero fetch`.
+5. Call the capability with a narrow `--max-pay` cap.
+6. Summarize the result and include the Zero run ID when available.
+
+Never use `zero review` unless the user explicitly asks you to review a
+completed Zero run.
diff --git a/plugins/zero-roo/roo/marketplace-mcp.json b/plugins/zero-roo/roo/marketplace-mcp.json
new file mode 100644
index 0000000..96a44f5
--- /dev/null
+++ b/plugins/zero-roo/roo/marketplace-mcp.json
@@ -0,0 +1,15 @@
+{
+  "name": "Zero",
+  "description": "Connect Roo Code to Zero for capability search, account authorization, and funding status over MCP.",
+  "config": {
+    "type": "streamable-http",
+    "url": "https://mcp.zero.xyz",
+    "alwaysAllow": [],
+    "disabled": false
+  },
+  "notes": [
+    "Keep alwaysAllow empty by default.",
+    "Only add known read-only Zero MCP tools after verifying their names in Roo.",
+    "Paid capability calls should go through the zero runner with an explicit --max-pay cap and user confirmation."
+  ]
+}
diff --git a/plugins/zero-roo/roo/mcp.json b/plugins/zero-roo/roo/mcp.json
new file mode 100644
index 0000000..98e908f
--- /dev/null
+++ b/plugins/zero-roo/roo/mcp.json
@@ -0,0 +1,10 @@
+{
+  "mcpServers": {
+    "zero": {
+      "type": "streamable-http",
+      "url": "https://mcp.zero.xyz",
+      "alwaysAllow": [],
+      "disabled": false
+    }
+  }
+}
diff --git a/plugins/zero-roo/roo/rules/zero.md b/plugins/zero-roo/roo/rules/zero.md
new file mode 100644
index 0000000..42419ee
--- /dev/null
+++ b/plugins/zero-roo/roo/rules/zero.md
@@ -0,0 +1,10 @@
+# Zero
+
+Zero is available in this project through the `zero` skill and the Zero MCP
+server. When a request needs an external capability that Roo does not provide
+natively, use the Zero workflow instead of telling the user to sign up for a
+separate service.
+
+Resolve the `zero` runner before the first call. If it is not on `PATH`, use
+`$HOME/.zero/runtime/bin/zero`. Do not create a wallet for the user. Ask for
+explicit confirmation before any `zero fetch` call that may spend money.
diff --git a/plugins/zero/.claude-plugin/plugin.json b/plugins/zero/.claude-plugin/plugin.json
index 6b83198..59e52a7 100644
--- a/plugins/zero/.claude-plugin/plugin.json
+++ b/plugins/zero/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "zero",
-  "version": "1.3.3",
+  "version": "1.4.0",
   "description": "Discover and call paid AI capabilities (x402 / MPP) with automatic, wallet-backed payment. Search a live index of external services — image/video/audio generation, web scraping, data enrichment, real-time data, messaging — then call them and pay per use. Bundles the 'zero' skill and the Zero MCP connector.",
   "author": { "name": "Zero", "url": "https://zero.xyz" },
   "homepage": "https://zero.xyz",
diff --git a/plugins/zero/.codex-plugin/plugin.json b/plugins/zero/.codex-plugin/plugin.json
index e90630a..3a8d304 100644
--- a/plugins/zero/.codex-plugin/plugin.json
+++ b/plugins/zero/.codex-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "zero",
-  "version": "1.3.3",
+  "version": "1.4.0",
   "description": "Discover and call paid AI capabilities (x402 / MPP) with automatic, wallet-backed payment. Search a live index of external services — image/video/audio generation, web scraping, data enrichment, real-time data, messaging — then call them and pay per use. Bundles the 'zero' skill.",
   "author": { "name": "Zero", "url": "https://zero.xyz" },
   "homepage": "https://zero.xyz",
diff --git a/plugins/zero/.factory-plugin/plugin.json b/plugins/zero/.factory-plugin/plugin.json
index 6b83198..59e52a7 100644
--- a/plugins/zero/.factory-plugin/plugin.json
+++ b/plugins/zero/.factory-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "zero",
-  "version": "1.3.3",
+  "version": "1.4.0",
   "description": "Discover and call paid AI capabilities (x402 / MPP) with automatic, wallet-backed payment. Search a live index of external services — image/video/audio generation, web scraping, data enrichment, real-time data, messaging — then call them and pay per use. Bundles the 'zero' skill and the Zero MCP connector.",
   "author": { "name": "Zero", "url": "https://zero.xyz" },
   "homepage": "https://zero.xyz",
diff --git a/scripts/build-roo.sh b/scripts/build-roo.sh
new file mode 100755
index 0000000..731609c
--- /dev/null
+++ b/scripts/build-roo.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+#
+# Assemble the Roo Code adapter into dist/zero-roo/.
+#
+# Usage:
+#   scripts/build-roo.sh                 # assemble dist/zero-roo/
+#   scripts/build-roo.sh --tar OUT.tgz   # also write a tarball
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+SHARED="$ROOT/plugins/zero"
+OVERLAY="$ROOT/plugins/zero-roo"
+OUT="$ROOT/dist/zero-roo"
+
+TARBALL=""
+if [ "${1:-}" = "--tar" ]; then
+  TARBALL="${2:?--tar requires an output path}"
+fi
+
+for f in \
+  "$OVERLAY/manifest.json" \
+  "$OVERLAY/roo/mcp.json" \
+  "$OVERLAY/roo/marketplace-mcp.json" \
+  "$OVERLAY/roo/rules/zero.md" \
+  "$OVERLAY/roo/commands/zero.md" \
+  "$SHARED/skills/zero/SKILL.md"; do
+  [ -f "$f" ] || { echo "build-roo: missing required input: $f" >&2; exit 1; }
+done
+
+rm -rf "$OUT"
+mkdir -p \
+  "$OUT/.roo/skills/zero" \
+  "$OUT/.roo/rules" \
+  "$OUT/.roo/commands" \
+  "$OUT/.agents/skills/zero" \
+  "$OUT/roo"
+
+cp "$OVERLAY/manifest.json"             "$OUT/manifest.json"
+cp "$OVERLAY/roo/mcp.json"              "$OUT/.roo/mcp.json"
+cp "$OVERLAY/roo/marketplace-mcp.json"  "$OUT/roo/marketplace-mcp.json"
+cp "$OVERLAY/roo/rules/zero.md"         "$OUT/.roo/rules/zero.md"
+cp "$OVERLAY/roo/commands/zero.md"      "$OUT/.roo/commands/zero.md"
+cp "$SHARED/skills/zero/SKILL.md"       "$OUT/.roo/skills/zero/SKILL.md"
+cp "$SHARED/skills/zero/SKILL.md"       "$OUT/.agents/skills/zero/SKILL.md"
+
+echo "build-roo: assembled $OUT"
+find "$OUT" -type f | sed "s#^$ROOT/##" | sort
+
+if [ -n "$TARBALL" ]; then
+  mkdir -p "$(dirname "$TARBALL")"
+  tar -czf "$TARBALL" -C "$OUT" .
+  echo "build-roo: wrote $TARBALL"
+fi