diff --git a/.cursor-plugin/marketplace.json b/.cursor-plugin/marketplace.json
index 918bb39..976adbc 100644
--- a/.cursor-plugin/marketplace.json
+++ b/.cursor-plugin/marketplace.json
@@ -32,6 +32,11 @@
       "name": "ralph-loop",
       "source": "ralph-loop",
       "description": "Iterative self-referential AI loops using the Ralph Wiggum technique."
+    },
+    {
+      "name": "aether",
+      "source": "aether",
+      "description": "AI co-debugging for Unity. One-click install—your AI can see your game."
     }
   ]
 }
diff --git a/aether/.cursor-plugin/plugin.json b/aether/.cursor-plugin/plugin.json
new file mode 100644
index 0000000..29b8f25
--- /dev/null
+++ b/aether/.cursor-plugin/plugin.json
@@ -0,0 +1,33 @@
+{
+  "name": "aether",
+  "displayName": "Aether",
+  "version": "0.4.9",
+  "description": "AI co-debugging for Unity. One-click install—your AI can see your game.",
+  "author": {
+    "name": "Finexma",
+    "email": "support@getaether.dev"
+  },
+  "homepage": "https://getaether.dev",
+  "repository": "https://github.com/finexma-dev/aether",
+  "license": "MIT",
+  "logo": "assets/avatar.png",
+  "keywords": [
+    "aether",
+    "unity",
+    "debugging",
+    "mcp",
+    "game-dev",
+    "gtml",
+    "live-inspector",
+    "replay"
+  ],
+  "category": "developer-tools",
+  "tags": [
+    "unity",
+    "game-development",
+    "debugging",
+    "mcp",
+    "ai-assistant"
+  ],
+  "skills": "./skills/"
+}
diff --git a/aether/CHANGELOG.md b/aether/CHANGELOG.md
new file mode 100644
index 0000000..fcb2ac6
--- /dev/null
+++ b/aether/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+## v0.4.9 — Initial Cursor Marketplace release
+
+- MCP server via Aether Bridge local binary
+- Unity SDK v0.4.9 support
+- Compatible with Unity 2021.3 LTS and newer
+- Aether debugging skill for gameplay, crash analysis, and verification
diff --git a/aether/LICENSE b/aether/LICENSE
new file mode 100644
index 0000000..ea87105
--- /dev/null
+++ b/aether/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Aether
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/aether/README.md b/aether/README.md
new file mode 100644
index 0000000..d3335b9
--- /dev/null
+++ b/aether/README.md
@@ -0,0 +1,85 @@
+# Aether
+
+**AI co-debugging for Unity.** Stop narrating your gameplay—your AI can see the game.
+
+Aether bridges your Unity game to Cursor, giving the AI complete context: live state, event history, crashes, and GTML snapshots. Two modes: **Live Inspector** (real-time object inspection) and **Replay Mode** (time-travel debugging after a bug).
+
+---
+
+## Install
+
+```bash
+/add-plugin aether
+```
+
+That's it. The bridge auto-downloads on first use.
+
+**First time in a Unity project?** Run this once from your project root:
+
+```bash
+npx aether-init
+```
+
+Then reload Cursor (Ctrl+Shift+P → Reload Window), enter Play mode, and ask your AI: *"What's the state of my game?"*
+
+---
+
+## Requirements
+
+Unity 2021.3+, Node.js 18+, Cursor with MCP
+
+---
+
+## When the Agent Uses Aether
+
+The plugin includes a skill that guides the agent to use Aether when:
+
+- Debugging Unity gameplay behavior
+- Analyzing crashes, NullReferenceExceptions, or runtime errors
+- Inspecting object state during Play Mode
+- Asking "what happened before this crash?" or "why is this object behaving wrong?"
+
+The agent will call tools like `aether_snapshot`, `aether_tail`, `aether_console`, and `aether_last_run_answer` to get live context from your game.
+
+---
+
+## MCP Tools
+
+| Tool | Description |
+|------|-------------|
+| `aether_snapshot` | Current Unity state: selected object, scene, frame, recent events |
+| `aether_tail` | Events + console + state over last N seconds |
+| `aether_console` | Query Unity stdout logs with filters |
+| `aether_last_run_answer` | Answer engine for the last run with receipts |
+| `aether_mark` | Save a moment (clip) with context |
+| `aether_docs` | Get authoritative tool documentation |
+
+See [Aether docs](https://docs.getaether.dev) for the full tool list.
+
+---
+
+## Manual Setup
+
+Technical users or non-Cursor setups: see [getaether.dev](https://getaether.dev) for download links and manual MCP configuration.
+
+---
+
+## Pro Trial
+
+Aether Pro includes proof clips, capsules, probes, and vision analysis. **14-day free trial, no credit card required.** See [getaether.dev](https://getaether.dev) for details.
+
+---
+
+## Troubleshooting
+
+**MCP won't start / "script not found"** — Cursor runs the launcher from the plugin directory. If you see script path errors, ensure the plugin was installed correctly. You can still use Aether by running `npx aether-init`; it writes `.cursor/mcp.json` with the direct bridge path.
+
+## Windows SmartScreen
+
+On first run, Windows may show SmartScreen for the bridge binary. Choose "More info" → "Run anyway." The binary is signed; this is a one-time prompt.
+
+---
+
+## License
+
+MIT
diff --git a/aether/assets/README.md b/aether/assets/README.md
new file mode 100644
index 0000000..480485d
--- /dev/null
+++ b/aether/assets/README.md
@@ -0,0 +1,3 @@
+Add `avatar.png` here (128×128 or 256×256 recommended) for the plugin marketplace icon.
+
+The `plugin.json` references `assets/avatar.png`. If omitted, the plugin may still install but won't display an icon in the marketplace.
diff --git a/aether/assets/avatar.png b/aether/assets/avatar.png
new file mode 100644
index 0000000..59f9141
Binary files /dev/null and b/aether/assets/avatar.png differ
diff --git a/aether/mcp.json b/aether/mcp.json
new file mode 100644
index 0000000..7bf1065
--- /dev/null
+++ b/aether/mcp.json
@@ -0,0 +1,9 @@
+{
+  "mcpServers": {
+    "aether": {
+      "command": "node",
+      "args": ["scripts/start-mcp.js"],
+      "env": {}
+    }
+  }
+}
diff --git a/aether/scripts/start-mcp.js b/aether/scripts/start-mcp.js
new file mode 100644
index 0000000..41f33c1
--- /dev/null
+++ b/aether/scripts/start-mcp.js
@@ -0,0 +1,65 @@
+#!/usr/bin/env node
+
+/**
+ * Aether MCP launcher — OS-agnostic.
+ * Locates the bridge at ~/.aether/bin. If missing, auto-downloads via npx aether-init --bridge-only.
+ * Then spawns the bridge with --stdio.
+ */
+
+const { spawn, execSync } = require("child_process");
+const { existsSync } = require("fs");
+const { homedir, platform, arch } = require("os");
+const { join } = require("path");
+
+function detectPlatform() {
+  const os = platform();
+  const cpu = arch();
+  if (os === "win32") return { os: "windows", arch: "x64", ext: ".exe" };
+  if (os === "darwin") return { os: "darwin", arch: cpu === "arm64" ? "arm64" : "x64", ext: "" };
+  if (os === "linux") return { os: "linux", arch: "x64", ext: "" };
+  throw new Error(`Unsupported platform: ${os}/${cpu}`);
+}
+
+function getBinaryName(plat) {
+  return `aether-bridge-${plat.os}-${plat.arch}${plat.ext}`;
+}
+
+const binDir = join(homedir(), ".aether", "bin");
+const plat = detectPlatform();
+const binaryName = getBinaryName(plat);
+const bridgePath = join(binDir, binaryName);
+
+if (!existsSync(bridgePath)) {
+  try {
+    execSync("npx aether-init@latest --bridge-only", {
+      stdio: "ignore",
+      env: { ...process.env, npm_config_yes: "true" },
+    });
+  } catch (e) {
+    console.error(
+      "[Aether] Bridge not found and auto-download failed. Run manually from your Unity project root:\n  npx aether-init\nThen reload Cursor (Ctrl+Shift+P → Reload Window)."
+    );
+    process.exit(1);
+  }
+  if (!existsSync(bridgePath)) {
+    console.error("[Aether] Bridge download completed but binary not found. Try: npx aether-init");
+    process.exit(1);
+  }
+}
+
+const child = spawn(bridgePath, ["--stdio"], {
+  stdio: ["pipe", "pipe", "inherit"],
+});
+
+process.stdin.pipe(child.stdin);
+child.stdout.pipe(process.stdout);
+
+child.on("error", (err) => {
+  console.error("[Aether] Failed to start bridge:", err.message);
+  process.exit(1);
+});
+
+child.on("exit", (code, signal) => {
+  if (code !== null) process.exit(code);
+  process.exit(signal === "SIGTERM" ? 143 : 1);
+});
diff --git a/aether/skills/aether-debugging/SKILL.md b/aether/skills/aether-debugging/SKILL.md
new file mode 100644
index 0000000..0db4da2
--- /dev/null
+++ b/aether/skills/aether-debugging/SKILL.md
@@ -0,0 +1,51 @@
+---
+name: aether-debugging
+description: Use Aether MCP tools when debugging Unity gameplay behavior, analyzing runtime crashes, inspecting object state during Play Mode, or when the user asks what happened before a crash or why an object is misbehaving.
+---
+
+# Aether Unity Debugging
+
+## MCP Gate (Required First)
+
+**Before recommending any Aether tool calls:** Check whether Aether tools are available. If the user gets "tool not found," "aether_snapshot failed," or similar errors, or if you cannot invoke Aether tools:
+
+1. **Instruct the user to run** `npx aether-init` from their Unity project root.
+2. **Tell them to reload Cursor** (Ctrl+Shift+P → "Reload Window").
+3. **Then retry** the Aether tool call.
+
+Only recommend tool calls (aether_snapshot, aether_tail, etc.) **after** confirming Aether is configured. Do not suggest tools the user cannot use.
+
+---
+
+## When to Use
+
+- User mentions Unity, gameplay bug, crash, or runtime error
+- User asks "what went wrong?", "what happened before this crash?", "why is this object falling through the floor?"
+- User is debugging in Play Mode and needs object state or event history
+- User references Aether tools or GTML
+
+## Prerequisites (for tool calls)
+
+1. User ran `npx aether-init` from their Unity project root
+2. Unity is in Play Mode (for live data) or has recorded a session (for replay)
+
+## Key Tools
+
+| Tool | Use when |
+|------|----------|
+| `aether_snapshot` | Need current state of selected GameObject, scene, frame |
+| `aether_tail` | Need recent events, console logs, state changes (last N seconds) |
+| `aether_console` | Need to search/filter Unity stdout logs |
+| `aether_last_run_answer` | Need causal answer for "what led to this?" with receipts |
+| `aether_docs` | Need full tool documentation |
+
+## Workflow
+
+1. **Live Inspector**: User selects GameObject in Unity → ask for snapshot → analyze GTML for issues (disabled colliders, wrong velocity, etc.)
+2. **Replay / Crash**: User hit a bug → ask "what happened before this crash?" → use `aether_tail` or `aether_last_run_answer` for timeline
+3. **Console search**: Use `aether_console` with text/level filters to find relevant logs
+4. **Verification**: After making code changes, ask the user to enter Play mode, then use Aether to verify the fix worked (snapshot, tail, or last_run_answer)
+
+## Output Format
+
+Aether returns GTML (Game Temporal Markup Language)—structured XML that LLMs parse well. Look for `[ISSUE: ...]` tags for detected problems.