diff --git a/Makefile b/Makefile
index 8c75263..be4ca2d 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ MANIFESTS := \
 	plugins/zero/.claude-plugin/plugin.json \
 	plugins/zero/.codex-plugin/plugin.json \
 	plugins/zero/.factory-plugin/plugin.json \
+	plugins/zero-opencode/package.json \
 	plugins/zero-gemini/gemini-extension.json
 
 # The manifest read for the current version (all of MANIFESTS stay in lockstep).
diff --git a/README.md b/README.md
index d799ec2..f55b23f 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)**
+- **[OpenCode](guides/opencode.md)**
 - **Anything else** — the standalone installer works in any agent with a
   shell (and for humans at a terminal):
 
@@ -73,6 +74,7 @@ plugins/zero/                     # the shared plugin: skill + hooks (+ Claude's
   ├── .codex-plugin/              # Codex manifest
   └── .factory-plugin/            # Droid manifest
 plugins/zero-gemini/              # thin Gemini-only overlay (manifest + hook wiring)
+plugins/zero-opencode/            # OpenCode JS plugin package
 scripts/build-gemini.sh           # assembles the installable Gemini extension into dist/
 guides/                           # per-host install guides + the agent install runbook
 ```
@@ -83,5 +85,5 @@ 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
+**OpenCode** plugins; additional hosts will land in subsequent PRs.
diff --git a/guides/opencode.md b/guides/opencode.md
new file mode 100644
index 0000000..6a065bb
--- /dev/null
+++ b/guides/opencode.md
@@ -0,0 +1,34 @@
+# Zero for OpenCode
+
+How to install Zero in OpenCode and keep it up to date.
+
+## Install
+
+### Inside OpenCode
+
+Inside an OpenCode session, run:
+
+```
+/plugin @zeroxyz/opencode-zero
+```
+
+Start a new OpenCode session after the plugin installs.
+
+### From the terminal
+
+```bash
+opencode plugin @zeroxyz/opencode-zero
+```
+
+Start a new OpenCode session. Zero sets itself up automatically, including the
+runner, skill, MCP server, and `/zero` command. Ask OpenCode: *"Help me set up
+and test Zero."* It walks you through signing in.
+
+## Staying up to date
+
+- The Zero runner updates at the start of each session.
+- To update the OpenCode plugin itself, run:
+
+  ```bash
+  opencode plugin @zeroxyz/opencode-zero --force
+  ```
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-opencode/README.md b/plugins/zero-opencode/README.md
new file mode 100644
index 0000000..9838e22
--- /dev/null
+++ b/plugins/zero-opencode/README.md
@@ -0,0 +1,12 @@
+# Zero for OpenCode
+
+OpenCode plugin package for Zero.
+
+This package prepares the Zero runner, installs the Zero skill into OpenCode's
+skill directory, registers the Zero MCP server, writes a `/zero` command,
+injects the Zero availability reminder, adds `ZERO_RUNNER` and
+`~/.zero/runtime/bin` to shell tool environments, and auto-allows safe read-only
+Zero commands. It does not auto-allow `zero fetch` or wallet/funding commands.
+
+Consumer installation instructions live in
+[`../../guides/opencode.md`](../../guides/opencode.md).
diff --git a/plugins/zero-opencode/index.js b/plugins/zero-opencode/index.js
new file mode 100644
index 0000000..e46bfd7
--- /dev/null
+++ b/plugins/zero-opencode/index.js
@@ -0,0 +1,188 @@
+import { existsSync } from "node:fs";
+import { mkdir, rm, writeFile } from "node:fs/promises";
+import { delimiter, join } from "node:path";
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+
+const ZERO_CONTEXT =
+  "Zero is available to you: a search engine and payment layer for tasks beyond your native abilities, including image/video/audio generation, translation, weather and location, web scraping, data enrichment, real-time data, messaging, on-chain actions, and more. Before saying you cannot do something, or telling the user to sign up for, get an API key for, or use an external tool themselves, use the zero skill to search Zero first.";
+
+const ZERO_COMMAND = `---
+description: Search Zero for an external capability and run the Zero workflow
+---
+
+Use the Zero skill for this request. Run the Zero workflow from the installed
+runner: search for a matching capability, inspect it, call it only with an
+appropriate max-pay cap, and review the result when a paid call completes.
+
+User request: $ARGUMENTS
+`;
+
+function runtimeBinDir() {
+  return join(process.env.ZERO_PLUGINS_HOME || join(process.env.HOME || "", ".zero", "runtime"), "bin");
+}
+
+function runnerPath() {
+  return join(runtimeBinDir(), process.platform === "win32" ? "zero.cmd" : "zero");
+}
+
+async function commandWorks(command, args = ["--version"]) {
+  try {
+    await execFileAsync(command, args, { timeout: 10_000 });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function ensureRunner(client) {
+  const runner = runnerPath();
+  if (existsSync(runner) && await commandWorks(runner)) return runner;
+  if (await commandWorks("zero")) return "zero";
+
+  if (!await commandWorks("npm", ["--version"])) {
+    await log(client, "warn", "npm is unavailable; Zero runner setup skipped");
+    return runner;
+  }
+
+  const runtimeHome = process.env.ZERO_PLUGINS_HOME || join(process.env.HOME || "", ".zero", "runtime");
+  await mkdir(runtimeHome, { recursive: true });
+  await rm(runner, { force: true });
+  await rm(join(runtimeBinDir(), process.platform === "win32" ? "zerocli.cmd" : "zerocli"), { force: true });
+  await execFileAsync("npm", ["install", "-g", "@zeroxyz/cli@latest", "--prefix", runtimeHome, "--force"], {
+    timeout: 120_000,
+    env: {
+      ...process.env,
+      npm_config_cache: join(runtimeHome, ".npm"),
+    },
+  });
+  return runner;
+}
+
+async function installOpenCodeAssets(runner, client) {
+  const configHome = process.env.OPENCODE_CONFIG_DIR || join(process.env.HOME || "", ".config", "opencode");
+  const skillsDir = join(configHome, "skills");
+  const commandsDir = join(configHome, "commands");
+
+  await mkdir(commandsDir, { recursive: true });
+  await writeFile(join(commandsDir, "zero.md"), ZERO_COMMAND, "utf8");
+
+  if (runner === "zero" || existsSync(runner)) {
+    try {
+      await execFileAsync(runner, ["init", "--skills-dir", skillsDir], { timeout: 60_000 });
+    } catch (error) {
+      await log(client, "warn", "Zero skill install failed", { message: String(error?.message || error) });
+    }
+  }
+}
+
+async function log(client, level, message, extra = {}) {
+  try {
+    await client?.app?.log?.({
+      body: {
+        service: "zero-opencode",
+        level,
+        message,
+        extra,
+      },
+    });
+  } catch {
+    // Logging must never break a user session.
+  }
+}
+
+function collectStrings(value, out = []) {
+  if (typeof value === "string") {
+    out.push(value);
+    return out;
+  }
+  if (Array.isArray(value)) {
+    for (const item of value) collectStrings(item, out);
+    return out;
+  }
+  if (value && typeof value === "object") {
+    for (const item of Object.values(value)) collectStrings(item, out);
+  }
+  return out;
+}
+
+function zeroCommandFromPermission(input) {
+  const strings = collectStrings({
+    title: input?.title,
+    pattern: input?.pattern,
+    metadata: input?.metadata,
+  });
+
+  for (const value of strings) {
+    const match = value.match(/(?:^|[;&|]\s*)(?:[A-Za-z_][A-Za-z0-9_]*=\S+\s+)*(?:\S+\/)?(zero|zerocli)\s+([A-Za-z0-9_-]+)(?:\s|$)(.*)$/);
+    if (match) {
+      return {
+        command: value,
+        subcommand: match[2],
+        rest: match[3] || "",
+      };
+    }
+  }
+  return null;
+}
+
+function isSafeZeroCommand(input) {
+  const parsed = zeroCommandFromPermission(input);
+  if (!parsed) return false;
+
+  switch (parsed.subcommand) {
+    case "search":
+    case "get":
+    case "review":
+    case "runs":
+    case "init":
+      return true;
+    case "config":
+      return !/\s--set(?:\s|=|$)/.test(parsed.rest);
+    default:
+      return false;
+  }
+}
+
+export const ZeroPlugin = async ({ client }) => {
+  return {
+    config: async (input) => {
+      input.mcp = input.mcp || {};
+      input.mcp.zero = input.mcp.zero || {
+        type: "remote",
+        url: "https://mcp.zero.xyz",
+        enabled: true,
+      };
+    },
+
+    event: async ({ event }) => {
+      if (event?.type !== "session.created") return;
+      try {
+        const runner = await ensureRunner(client);
+        await installOpenCodeAssets(runner, client);
+        await log(client, "info", "Zero runner prepared", { runner });
+      } catch (error) {
+        await log(client, "warn", "Zero runner setup failed", { message: String(error?.message || error) });
+      }
+    },
+
+    "experimental.chat.system.transform": async (_input, output) => {
+      output.system.push(ZERO_CONTEXT);
+    },
+
+    "shell.env": async (_input, output) => {
+      const bin = runtimeBinDir();
+      output.env.ZERO_RUNNER = runnerPath();
+      output.env.PATH = [bin, output.env.PATH || process.env.PATH || ""].filter(Boolean).join(delimiter);
+    },
+
+    "permission.ask": async (input, output) => {
+      if (!isSafeZeroCommand(input)) return;
+      output.status = "allow";
+    },
+  };
+};
+
+export default ZeroPlugin;
diff --git a/plugins/zero-opencode/package.json b/plugins/zero-opencode/package.json
new file mode 100644
index 0000000..7efdbd9
--- /dev/null
+++ b/plugins/zero-opencode/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "@zeroxyz/opencode-zero",
+  "version": "1.4.0",
+  "description": "OpenCode plugin for Zero: runner setup, context injection, and safe Zero command auto-approval.",
+  "type": "module",
+  "license": "MIT",
+  "homepage": "https://zero.xyz",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/officialzeroxyz/zero-plugins.git",
+    "directory": "plugins/zero-opencode"
+  },
+  "keywords": ["opencode", "zero", "x402", "mpp", "payments", "capabilities"],
+  "main": "./index.js",
+  "exports": {
+    ".": "./index.js",
+    "./server": "./index.js"
+  },
+  "files": ["index.js", "README.md"]
+}
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",