diff --git a/cli/src/output.rs b/cli/src/output.rs
index 0f3ae46..93beffb 100644
--- a/cli/src/output.rs
+++ b/cli/src/output.rs
@@ -1,9 +1,83 @@
+use std::sync::OnceLock;
+
 use crate::color;
 use crate::connection::Response;
 
-pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
-    if json_mode {
-        println!("{}", serde_json::to_string(resp).unwrap_or_default());
+static BOUNDARY_NONCE: OnceLock<String> = OnceLock::new();
+
+/// Per-process nonce for content boundary markers. Uses a CSPRNG (getrandom) so
+/// that untrusted page content cannot predict or spoof the boundary delimiter.
+/// Process ID or timestamps would be insufficient since pages can read those.
+fn get_boundary_nonce() -> &'static str {
+    BOUNDARY_NONCE.get_or_init(|| {
+        let mut buf = [0u8; 16];
+        getrandom::getrandom(&mut buf).expect("failed to generate random nonce");
+        buf.iter().map(|b| format!("{:02x}", b)).collect()
+    })
+}
+
+#[derive(Default)]
+pub struct OutputOptions {
+    pub json: bool,
+    pub content_boundaries: bool,
+    pub max_output: Option<usize>,
+}
+
+fn truncate_if_needed(content: &str, max: Option<usize>) -> String {
+    let Some(limit) = max else {
+        return content.to_string();
+    };
+    // Fast path: byte length is a lower bound on char count, so if the
+    // byte length is within the limit the char count must be too.
+    if content.len() <= limit {
+        return content.to_string();
+    }
+    // Find the byte offset of the limit-th character.
+    match content.char_indices().nth(limit).map(|(i, _)| i) {
+        Some(byte_offset) => {
+            let total_chars = content.chars().count();
+            format!(
+                "{}\n[truncated: showing {} of {} chars. Use --max-output to adjust]",
+                &content[..byte_offset], limit, total_chars
+            )
+        }
+        // Content has fewer than `limit` chars despite more bytes
+        None => content.to_string(),
+    }
+}
+
+fn print_with_boundaries(content: &str, origin: Option<&str>, opts: &OutputOptions) {
+    let content = truncate_if_needed(content, opts.max_output);
+    if opts.content_boundaries {
+        let origin_str = origin.unwrap_or("unknown");
+        let nonce = get_boundary_nonce();
+        println!("--- AGENT_BROWSER_PAGE_CONTENT nonce={} origin={} ---", nonce, origin_str);
+        println!("{}", content);
+        println!("--- END_AGENT_BROWSER_PAGE_CONTENT nonce={} ---", nonce);
+    } else {
+        println!("{}", content);
+    }
+}
+
+pub fn print_response_with_opts(resp: &Response, action: Option<&str>, opts: &OutputOptions) {
+    if opts.json {
+        if opts.content_boundaries {
+            let mut json_val = serde_json::to_value(resp).unwrap_or_default();
+            if let Some(obj) = json_val.as_object_mut() {
+                let nonce = get_boundary_nonce();
+                let origin = obj.get("data")
+                    .and_then(|d| d.get("origin"))
+                    .and_then(|v| v.as_str())
+                    .unwrap_or("unknown");
+                obj.insert("_boundary".to_string(), serde_json::json!({
+                    "nonce": nonce,
+                    "origin": origin,
+                }));
+            }
+            println!("{}", serde_json::to_string(&json_val).unwrap_or_default());
+        } else {
+            println!("{}", serde_json::to_string(resp).unwrap_or_default());
+        }
         return;
     }
 
@@ -82,9 +156,10 @@ pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
                 _ => {}
             }
         }
+        let origin = data.get("origin").and_then(|v| v.as_str());
         // Snapshot
         if let Some(snapshot) = data.get("snapshot").and_then(|v| v.as_str()) {
-            println!("{}", snapshot);
+            print_with_boundaries(snapshot, origin, opts);
             return;
         }
         // Title
@@ -94,12 +169,12 @@ pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
         }
         // Text
         if let Some(text) = data.get("text").and_then(|v| v.as_str()) {
-            println!("{}", text);
+            print_with_boundaries(text, origin, opts);
             return;
         }
         // HTML
         if let Some(html) = data.get("html").and_then(|v| v.as_str()) {
-            println!("{}", html);
+            print_with_boundaries(html, origin, opts);
             return;
         }
         // Value
@@ -127,10 +202,8 @@ pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
         }
         // Eval result
         if let Some(result) = data.get("result") {
-            println!(
-                "{}",
-                serde_json::to_string_pretty(result).unwrap_or_default()
-            );
+            let formatted = serde_json::to_string_pretty(result).unwrap_or_default();
+            print_with_boundaries(&formatted, origin, opts);
             return;
         }
         // iOS Devices
@@ -217,10 +290,23 @@ pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
         }
         // Console logs
         if let Some(logs) = data.get("messages").and_then(|v| v.as_array()) {
-            for log in logs {
-                let level = log.get("type").and_then(|v| v.as_str()).unwrap_or("log");
-                let text = log.get("text").and_then(|v| v.as_str()).unwrap_or("");
-                println!("{} {}", color::console_level_prefix(level), text);
+            if opts.content_boundaries {
+                let mut console_output = String::new();
+                for log in logs {
+                    let level = log.get("type").and_then(|v| v.as_str()).unwrap_or("log");
+                    let text = log.get("text").and_then(|v| v.as_str()).unwrap_or("");
+                    console_output.push_str(&format!("{} {}\n", color::console_level_prefix(level), text));
+                }
+                if console_output.ends_with('\n') {
+                    console_output.pop();
+                }
+                print_with_boundaries(&console_output, origin, opts);
+            } else {
+                for log in logs {
+                    let level = log.get("type").and_then(|v| v.as_str()).unwrap_or("log");
+                    let text = log.get("text").and_then(|v| v.as_str()).unwrap_or("");
+                    println!("{} {}", color::console_level_prefix(level), text);
+                }
             }
             return;
         }
@@ -593,6 +679,87 @@ pub fn print_response(resp: &Response, json_mode: bool, action: Option<&str>) {
             println!("{}", note);
             return;
         }
+        // Auth list
+        if let Some(profiles) = data.get("profiles").and_then(|v| v.as_array()) {
+            if profiles.is_empty() {
+                println!("{}", color::dim("No auth profiles saved"));
+            } else {
+                println!("{}", color::bold("Auth profiles:"));
+                for p in profiles {
+                    let name = p.get("name").and_then(|v| v.as_str()).unwrap_or("");
+                    let url = p.get("url").and_then(|v| v.as_str()).unwrap_or("");
+                    let user = p.get("username").and_then(|v| v.as_str()).unwrap_or("");
+                    println!("  {} {} {}", color::green(name), color::dim(user), color::dim(url));
+                }
+            }
+            return;
+        }
+
+        // Auth show
+        if let Some(profile) = data.get("profile").and_then(|v| v.as_object()) {
+            let name = profile.get("name").and_then(|v| v.as_str()).unwrap_or("");
+            let url = profile.get("url").and_then(|v| v.as_str()).unwrap_or("");
+            let user = profile.get("username").and_then(|v| v.as_str()).unwrap_or("");
+            let created = profile.get("createdAt").and_then(|v| v.as_str()).unwrap_or("");
+            let last_login = profile.get("lastLoginAt").and_then(|v| v.as_str());
+            println!("Name: {}", name);
+            println!("URL: {}", url);
+            println!("Username: {}", user);
+            println!("Created: {}", created);
+            if let Some(ll) = last_login {
+                println!("Last login: {}", ll);
+            }
+            return;
+        }
+
+        // Auth save/update/login/delete
+        if data.get("saved").and_then(|v| v.as_bool()).unwrap_or(false) {
+            let name = data.get("name").and_then(|v| v.as_str()).unwrap_or("");
+            println!("{} Auth profile '{}' saved", color::success_indicator(), name);
+            return;
+        }
+        if data.get("updated").and_then(|v| v.as_bool()).unwrap_or(false)
+            && !data.get("saved").and_then(|v| v.as_bool()).unwrap_or(false) {
+            let name = data.get("name").and_then(|v| v.as_str()).unwrap_or("");
+            println!("{} Auth profile '{}' updated", color::success_indicator(), name);
+            return;
+        }
+        if data.get("loggedIn").and_then(|v| v.as_bool()).unwrap_or(false) {
+            let name = data.get("name").and_then(|v| v.as_str()).unwrap_or("");
+            if let Some(title) = data.get("title").and_then(|v| v.as_str()) {
+                println!("{} Logged in as '{}' - {}", color::success_indicator(), name, title);
+            } else {
+                println!("{} Logged in as '{}'", color::success_indicator(), name);
+            }
+            return;
+        }
+        if data.get("deleted").and_then(|v| v.as_bool()).unwrap_or(false) {
+            if let Some(name) = data.get("name").and_then(|v| v.as_str()) {
+                println!("{} Auth profile '{}' deleted", color::success_indicator(), name);
+                return;
+            }
+        }
+
+        // Confirmation required (for orchestrator use)
+        if data.get("confirmation_required").and_then(|v| v.as_bool()).unwrap_or(false) {
+            let category = data.get("category").and_then(|v| v.as_str()).unwrap_or("");
+            let description = data.get("description").and_then(|v| v.as_str()).unwrap_or("");
+            let cid = data.get("confirmation_id").and_then(|v| v.as_str()).unwrap_or("");
+            println!("Confirmation required:");
+            println!("  {}: {}", category, description);
+            println!("  Run: agent-browser confirm {}", cid);
+            println!("  Or:  agent-browser deny {}", cid);
+            return;
+        }
+        if data.get("confirmed").and_then(|v| v.as_bool()).unwrap_or(false) {
+            println!("{} Action confirmed", color::success_indicator());
+            return;
+        }
+        if data.get("denied").and_then(|v| v.as_bool()).unwrap_or(false) {
+            println!("{} Action denied", color::success_indicator());
+            return;
+        }
+
         // Default success
         println!("{} Done", color::success_indicator());
     }
@@ -1600,6 +1767,64 @@ Examples:
 "##
         }
 
+        // === Auth ===
+        "auth" => {
+            r##"
+agent-browser auth - Manage authentication profiles
+
+Usage: agent-browser auth <subcommand> [args]
+
+Subcommands:
+  save <name>              Save credentials for a login profile
+  login <name>             Login using saved credentials
+  list                     List saved profiles (names and URLs only)
+  show <name>              Show profile metadata (no passwords)
+  delete <name>            Delete a saved profile
+
+Save Options:
+  --url <url>              Login page URL (required)
+  --username <user>        Username (required)
+  --password <pass>        Password (required unless --password-stdin)
+  --password-stdin          Read password from stdin (recommended)
+  --username-selector <s>  Custom CSS selector for username field
+  --password-selector <s>  Custom CSS selector for password field
+  --submit-selector <s>    Custom CSS selector for submit button
+
+Global Options:
+  --json                   Output as JSON
+  --session <name>         Use specific session
+
+Examples:
+  echo "pass" | agent-browser auth save github --url https://github.com/login --username user --password-stdin
+  agent-browser auth save github --url https://github.com/login --username user --password pass
+  agent-browser auth login github
+  agent-browser auth list
+  agent-browser auth show github
+  agent-browser auth delete github
+"##
+        }
+
+        // === Confirm/Deny ===
+        "confirm" | "deny" => {
+            r##"
+agent-browser confirm/deny - Approve or deny pending actions
+
+Usage:
+  agent-browser confirm <confirmation-id>
+  agent-browser deny <confirmation-id>
+
+When --confirm-actions is set, certain action categories return a
+confirmation_required response with a confirmation ID. Use confirm/deny
+to approve or reject the action.
+
+Pending confirmations auto-deny after 60 seconds.
+
+Examples:
+  agent-browser confirm c_8f3a1234
+  agent-browser deny c_8f3a1234
+"##
+        }
+
         // === Dialog ===
         "dialog" => {
             r##"
@@ -2125,6 +2350,17 @@ Debug:
   errors [--clear]           View page errors
   highlight <sel>            Highlight element
 
+Auth Vault:
+  auth save <name> [opts]    Save auth profile (--url, --username, --password/--password-stdin)
+  auth login <name>          Login using saved credentials
+  auth list                  List saved auth profiles
+  auth show <name>           Show auth profile metadata
+  auth delete <name>         Delete auth profile
+
+Confirmation:
+  confirm <id>               Approve a pending action
+  deny <id>                  Deny a pending action
+
 Sessions:
   session                    Show current session name
   session list               List active sessions
@@ -2167,6 +2403,12 @@ Options:
   --download-path <path>     Default download directory (or AGENT_BROWSER_DOWNLOAD_PATH)
   --risk-mode <mode>         Verify/captcha handling: off, warn, block (or AGENT_BROWSER_RISK_MODE)
   --session-name <name>      Auto-save/restore session state (cookies, localStorage)
+  --content-boundaries       Wrap page output in boundary markers (or AGENT_BROWSER_CONTENT_BOUNDARIES)
+  --max-output <chars>       Truncate page output to N chars (or AGENT_BROWSER_MAX_OUTPUT)
+  --allowed-domains <list>   Restrict navigation domains (or AGENT_BROWSER_ALLOWED_DOMAINS)
+  --action-policy <path>     Action policy JSON file (or AGENT_BROWSER_ACTION_POLICY)
+  --confirm-actions <list>   Categories requiring confirmation (or AGENT_BROWSER_CONFIRM_ACTIONS)
+  --confirm-interactive      Interactive confirmation prompts; auto-denies if stdin is not a TTY (or AGENT_BROWSER_CONFIRM_INTERACTIVE)
   --config <path>            Use a custom config file (or AGENT_BROWSER_CONFIG env)
   --debug                    Debug output
   --version, -V              Show version (fork builds include upstream/fork info)
@@ -2225,6 +2467,12 @@ Environment:
   AGENT_BROWSER_STREAM_PORT      Enable WebSocket streaming on port (e.g., 9223)
   AGENT_BROWSER_IOS_DEVICE       Default iOS device name
   AGENT_BROWSER_IOS_UDID         Default iOS device UDID
+  AGENT_BROWSER_CONTENT_BOUNDARIES Wrap page output in boundary markers
+  AGENT_BROWSER_MAX_OUTPUT       Max characters for page output
+  AGENT_BROWSER_ALLOWED_DOMAINS  Comma-separated allowed domain patterns
+  AGENT_BROWSER_ACTION_POLICY    Path to action policy JSON file
+  AGENT_BROWSER_CONFIRM_ACTIONS  Action categories requiring confirmation
+  AGENT_BROWSER_CONFIRM_INTERACTIVE Enable interactive confirmation prompts
 
 Install (recommended, fastest - native Rust CLI):
   npm install -g agent-browser-stealth
diff --git a/docs/src/app/changelog/page.mdx b/docs/src/app/changelog/page.mdx
index d5d8e54..7000a48 100644
--- a/docs/src/app/changelog/page.mdx
+++ b/docs/src/app/changelog/page.mdx
@@ -4,6 +4,123 @@ export const metadata = pageMetadata("changelog")
 
 # Changelog
 
+## v0.15.0
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### New Features
+
+- **Authentication vault** -- Store credentials locally (always AES-256-GCM encrypted) and reference them by name. The LLM never sees passwords. Commands: `auth save`, `auth login`, `auth list`, `auth show`, `auth delete`. Passwords can be piped via stdin (`--password-stdin`) to avoid shell history exposure.
+- **Content boundary markers** -- `--content-boundaries` wraps page-sourced output in structural delimiters with a per-process CSPRNG nonce, so LLMs can distinguish trusted tool output from untrusted page content. In `--json` mode, a `_boundary` object is injected with `nonce` and `origin` fields.
+- **Domain allowlist** -- `--allowed-domains` restricts navigation, sub-resource requests, WebSocket connections, and EventSource streams to trusted domains. Supports exact match and wildcard prefix patterns (e.g., `*.example.com`).
+- **Action policy** -- `--action-policy` gates actions using a static JSON policy file with `allow`/`deny` lists across 13 action categories. Auth vault operations bypass policy enforcement.
+- **Action confirmation** -- `--confirm-actions` requires explicit approval for sensitive action categories. New `confirm` and `deny` commands for orchestrator use. `--confirm-interactive` enables human-in-the-loop terminal prompts (auto-denies if stdin is not a TTY). Pending confirmations auto-deny after 60 seconds.
+- **Output length limits** -- `--max-output` truncates large page outputs to prevent LLM context flooding.
+- **`--download-path` option** -- Set a default download directory via flag, `AGENT_BROWSER_DOWNLOAD_PATH` env var, or `downloadPath` config key. Without it, downloads go to a temporary directory deleted when the browser closes.
+- **`--selector` flag for scroll** -- Scroll within a specific container element instead of the page: `agent-browser scroll down 500 --selector "div.scroll-container"`
+
+```bash
+# Auth vault
+echo "pass" | agent-browser auth save github --url https://github.com/login --username user --password-stdin
+agent-browser auth login github
+
+# Security flags
+agent-browser --content-boundaries --allowed-domains "example.com,*.example.com" --max-output 50000 open https://example.com
+
+# Download path
+agent-browser --download-path ./downloads open https://example.com
+
+# Scroll within container
+agent-browser scroll down 500 --selector "div.content"
+```
+
+### Environment Variables
+
+Six new environment variables for security configuration: `AGENT_BROWSER_CONTENT_BOUNDARIES`, `AGENT_BROWSER_MAX_OUTPUT`, `AGENT_BROWSER_ALLOWED_DOMAINS`, `AGENT_BROWSER_ACTION_POLICY`, `AGENT_BROWSER_CONFIRM_ACTIONS`, `AGENT_BROWSER_CONFIRM_INTERACTIVE`.
+
+---
+
+## v0.14.0
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### New Features
+
+- **`keyboard` command** -- Type with real keystrokes, insert text, and press shortcuts at the currently focused element without needing a selector (`keyboard type`, `keyboard inserttext`).
+- **`--color-scheme` flag** -- Persistent dark/light mode preference across browser sessions via flag or `AGENT_BROWSER_COLOR_SCHEME` env var.
+
+```bash
+agent-browser keyboard type "Hello world"
+agent-browser keyboard inserttext "pasted text"
+agent-browser --color-scheme dark open https://example.com
+```
+
+### Bug Fixes
+
+- Fixed IPC EAGAIN errors (os error 35/11) with backpressure-aware socket writes, command serialization, and lowered default Playwright timeout to 25s (configurable via `AGENT_BROWSER_DEFAULT_TIMEOUT`).
+- Fixed remote debugging (CDP) reconnection.
+- Fixed state load failing when no browser is running.
+- Fixed `--annotate` flag warning appearing when not explicitly passed via CLI.
+
+---
+
+## v0.13.0
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### New Features
+
+- **Diff commands** -- Compare snapshots, screenshots, and URLs between page states. Run visual pixel diffs against baseline images, compare accessibility tree snapshots with customizable depth and selectors, and diff two URLs side-by-side with optional screenshot comparison.
+
+```bash
+agent-browser diff snapshot
+agent-browser diff screenshot --baseline before.png
+agent-browser diff url https://staging.example.com https://prod.example.com
+```
+
+---
+
+## v0.12.0
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### New Features
+
+- **Annotated screenshots** -- `--annotate` flag overlays numbered labels on interactive elements and prints a legend mapping each label to its element ref. Enables multimodal AI models to reason about visual layout while using the same `@eN` refs for subsequent interactions. Also settable via `AGENT_BROWSER_ANNOTATE` env var.
+
+```bash
+agent-browser screenshot --annotate
+```
+
+---
+
+## v0.11.1
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### Documentation
+
+- Added documentation for command chaining with `&&` across README, CLI help output, docs, and skill files.
+
+---
+
+## v0.11.0
+
+<p className="text-[#888] text-sm">February 2026</p>
+
+### New Features
+
+- **Configuration file support** -- Automatic loading from user (`~/.agent-browser/config.json`) and project (`./agent-browser.json`) directories with priority-based merging.
+- **Profiler commands** -- Chrome DevTools profiling with `profiler start` and `profiler stop`.
+- **Browser extension loading** -- `--extension` flag to load browser extensions.
+- **Storage state management** -- `state save` and `state load` commands for auth state persistence.
+- **iOS device emulation** -- `--device` flag for device emulation.
+- **Enhanced click** -- `--new-tab` option for click commands.
+- **Enhanced find** -- Additional actions and filtering options.
+- **CDP WebSocket URLs** -- `--cdp` now accepts WebSocket URLs in addition to ports.
+
+---
+
 ## v0.10.0
 
 <p className="text-[#888] text-sm">February 2026</p>
diff --git a/docs/src/app/security/page.mdx b/docs/src/app/security/page.mdx
new file mode 100644
index 0000000..b1813ca
--- /dev/null
+++ b/docs/src/app/security/page.mdx
@@ -0,0 +1,243 @@
+import { pageMetadata } from "@/lib/page-metadata"
+export const metadata = pageMetadata("security")
+
+# Security
+
+agent-browser includes security features to protect against credential exposure, prompt injection via untrusted page content, and unauthorized browser actions.
+
+All security features are opt-in. By default, agent-browser imposes no restrictions on navigation, actions, or output. Enable these features as needed for your deployment -- existing workflows are unaffected until you explicitly activate a feature.
+
+## Threat Model
+
+These features are designed to mitigate the following threats when an LLM-based agent drives a browser:
+
+- **Credential exposure** -- Passwords stored in the auth vault are never included in LLM context. The CLI handles vault operations locally; credentials do not pass through the daemon's IPC channel.
+- **Prompt injection via page content** -- Malicious pages can embed text that looks like tool output or system instructions. Content boundary markers (`--content-boundaries`) let the orchestrator distinguish trusted tool output from untrusted page content.
+- **Unauthorized navigation / data exfiltration** -- A compromised or manipulated agent could navigate to attacker-controlled domains to exfiltrate data. The domain allowlist (`--allowed-domains`) blocks navigations, sub-resource requests, WebSocket connections, EventSource streams, and `sendBeacon` calls to non-allowed domains.
+- **Unauthorized destructive actions** -- Action policy (`--action-policy`) and confirmation gating (`--confirm-actions`) prevent the agent from performing dangerous operations (eval, downloads, uploads) without explicit approval.
+- **Context flooding** -- Large page outputs can overwhelm an LLM's context window. Output truncation (`--max-output`) caps the size of page-sourced content.
+
+### Known limitations
+
+- **WebSocket/EventSource blocking is best-effort.** It works by overriding browser constructors via an init script. If the `eval` action category is allowed, page scripts could theoretically restore the original constructors. Deny `eval` via `--action-policy` for maximum protection.
+- **Domain filter timing on remote connections.** When connecting to a pre-existing browser via CDP or a cloud provider, pages may have already loaded content before the domain filter is installed. agent-browser navigates disallowed pages to `about:blank` after the filter is active, but resources loaded before that point are not retroactively blocked.
+- **Content boundaries are defense-in-depth.** They rely on the LLM and orchestrator respecting the structural markers. A sufficiently capable adversarial page could attempt to mimic the boundary format, though the per-process CSPRNG nonce makes this impractical to predict.
+- **Confirmation timeout.** Pending confirmations auto-deny after 60 seconds. Orchestrators must respond within that window.
+- **Non-TTY auto-deny.** When `--confirm-interactive` is set but stdin is not a terminal (e.g., piped input), actions are automatically denied to prevent accidental approval in non-interactive contexts.
+
+## Authentication Vault
+
+Store credentials locally and reference them by name. The LLM never sees passwords.
+
+```bash
+# Save credentials (encrypted if AGENT_BROWSER_ENCRYPTION_KEY is set)
+# Recommended: pipe password via stdin to avoid shell history / process listing exposure
+echo "pass" | agent-browser auth save github --url https://github.com/login --username user --password-stdin
+
+# Or pass directly (a warning will be shown)
+agent-browser auth save github --url https://github.com/login --username user --password pass
+
+# Login using saved credentials
+agent-browser auth login github
+
+# List saved profiles (names and URLs only, no secrets)
+agent-browser auth list
+
+# Show profile metadata
+agent-browser auth show github
+
+# Delete a profile
+agent-browser auth delete github
+```
+
+Custom selectors can be specified if auto-detection fails:
+
+```bash
+agent-browser auth save myapp \
+  --url https://app.example.com/login \
+  --username user --password pass \
+  --username-selector "#email" \
+  --password-selector "#password" \
+  --submit-selector "button.login"
+```
+
+Profiles are stored in `~/.agent-browser/auth/` and always encrypted with AES-256-GCM. If `AGENT_BROWSER_ENCRYPTION_KEY` is not set, a key is auto-generated at `~/.agent-browser/.encryption-key` on first use. Back up this file or set the environment variable explicitly for portability.
+
+File permissions are enforced on both Unix (`chmod 600`/`700`) and Windows (`icacls` restricted to the current user) to prevent other users from reading encryption keys or auth profiles.
+
+## Content Boundary Markers
+
+When `--content-boundaries` is enabled, all page-sourced output is wrapped in structural markers so LLMs can distinguish tool output from untrusted page content:
+
+```
+--- AGENT_BROWSER_PAGE_CONTENT nonce=a1b2c3d4 origin=https://example.com ---
+[snapshot / text / html / eval output here]
+--- END_AGENT_BROWSER_PAGE_CONTENT nonce=a1b2c3d4 ---
+```
+
+The nonce is a random value generated per CLI process invocation, making it unpredictable to page content that might attempt to spoof the boundary.
+
+Enable via flag or environment variable:
+
+```bash
+agent-browser --content-boundaries snapshot
+# or
+export AGENT_BROWSER_CONTENT_BOUNDARIES=1
+```
+
+Affected output types: `snapshot`, `get text`, `get html`, `eval`, `console`.
+
+In `--json` mode, boundary metadata is injected into the JSON response as a `_boundary` object containing `nonce` and `origin` fields, allowing orchestrators to verify provenance programmatically:
+
+```json
+{
+  "success": true,
+  "data": { "snapshot": "...", "origin": "https://example.com" },
+  "_boundary": { "nonce": "a1b2c3d4e5f6...", "origin": "https://example.com" }
+}
+```
+
+## Domain Allowlist
+
+Restrict which domains the browser can interact with, preventing redirect-based attacks and data exfiltration:
+
+```bash
+agent-browser --allowed-domains "example.com,*.example.com,github.com" open https://example.com
+# or
+export AGENT_BROWSER_ALLOWED_DOMAINS="example.com,*.example.com"
+```
+
+Supports exact match (`github.com`) and wildcard prefix (`*.example.com`, which also matches the bare domain `example.com`). Both page navigations and sub-resource requests (scripts, images, fetch, XHR, etc.) to non-allowed domains are blocked, preventing data exfiltration. WebSocket and EventSource connections are also blocked via constructor-level patching. Non-http(s) sub-resources (data URIs, blobs) are still allowed. When a request is blocked, the command returns an error.
+
+> **Note:** The WebSocket/EventSource blocking is best-effort -- it works by overriding the browser constructors via an init script. If the `eval` action category is allowed, page scripts could theoretically restore the original constructors. For maximum protection, deny the `eval` category via `--action-policy` when using `--allowed-domains`.
+
+Config file:
+
+```json
+{
+  "allowedDomains": ["example.com", "*.example.com", "github.com"]
+}
+```
+
+> **CDN and third-party resources:** The domain filter blocks all sub-resource requests (scripts, stylesheets, images, fonts, fetch/XHR) to non-allowed domains. Most websites load assets from CDN domains. Include these in your allowlist or pages will break. For example:
+>
+> ```bash
+> --allowed-domains "myapp.com,*.myapp.com,cdn.jsdelivr.net,fonts.googleapis.com,fonts.gstatic.com"
+> ```
+
+## Action Policy
+
+Gate actions using a static policy file. The policy is enforced by the daemon -- denied actions fail immediately.
+
+```bash
+agent-browser --action-policy ./policy.json open https://example.com
+# or
+export AGENT_BROWSER_ACTION_POLICY=./policy.json
+```
+
+Example policy (permissive with specific denials):
+
+```json
+{
+  "default": "allow",
+  "deny": ["eval", "download", "upload"]
+}
+```
+
+Example policy (restrictive):
+
+```json
+{
+  "default": "deny",
+  "allow": ["navigate", "snapshot", "click", "scroll", "wait", "get"]
+}
+```
+
+<table>
+  <thead>
+    <tr><th>Category</th><th>Actions</th></tr>
+  </thead>
+  <tbody>
+    <tr><td><code>navigate</code></td><td>open, back, forward, reload, tab new</td></tr>
+    <tr><td><code>click</code></td><td>click, dblclick, tap</td></tr>
+    <tr><td><code>fill</code></td><td>fill, type, keyboard type/inserttext, select, check, uncheck</td></tr>
+    <tr><td><code>eval</code></td><td>eval, evalhandle, addscript, addinitscript, addstyle, expose, setcontent</td></tr>
+    <tr><td><code>download</code></td><td>download, waitfordownload</td></tr>
+    <tr><td><code>upload</code></td><td>upload</td></tr>
+    <tr><td><code>snapshot</code></td><td>snapshot, screenshot, pdf, diff</td></tr>
+    <tr><td><code>scroll</code></td><td>scroll, scrollintoview</td></tr>
+    <tr><td><code>wait</code></td><td>wait, waitforurl, waitforloadstate, waitforfunction</td></tr>
+    <tr><td><code>get</code></td><td>get text/html/url/title, count, isvisible, getbyrole, getbytext, getbylabel, etc.</td></tr>
+    <tr><td><code>interact</code></td><td>hover, focus, drag, press, keydown, keyup, mousemove, dispatch</td></tr>
+    <tr><td><code>network</code></td><td>network route/unroute, requests</td></tr>
+    <tr><td><code>state</code></td><td>state save/load, cookies set, storage set</td></tr>
+  </tbody>
+</table>
+
+Auth vault operations (`auth save`, `auth login`, `auth list`, `auth show`, `auth delete`) and other internal/meta operations bypass action policy enforcement since they are trusted local operations. Domain allowlist restrictions still apply to `auth login` navigations.
+
+## Action Confirmation
+
+For actions that require explicit approval, use `--confirm-actions` to specify categories that require confirmation:
+
+```bash
+# Orchestrator mode: returns confirmation_required response
+agent-browser --confirm-actions eval,download eval "document.title"
+
+# Then approve or deny:
+agent-browser confirm c_8f3a1234
+agent-browser deny c_8f3a1234
+```
+
+For interactive (human-in-the-loop) confirmation:
+
+```bash
+agent-browser --confirm-actions eval,download --confirm-interactive eval "document.title"
+# Prompts: Allow? [y/N]
+```
+
+Pending confirmations auto-deny after 60 seconds.
+
+> **Non-TTY behavior:** When `--confirm-interactive` is set but stdin is not a TTY (e.g., piped input or running inside an automated pipeline), actions are automatically denied. This prevents accidental approval in non-interactive contexts.
+
+## Output Length Limits
+
+Prevent context flooding by truncating large page outputs:
+
+```bash
+agent-browser --max-output 50000 get text body
+# or
+export AGENT_BROWSER_MAX_OUTPUT=50000
+```
+
+Affected output types: `snapshot`, `get text`, `get html`, `eval`, `console`.
+
+## Environment Variables
+
+<table>
+  <thead>
+    <tr><th>Variable</th><th>Description</th></tr>
+  </thead>
+  <tbody>
+    <tr><td><code>AGENT_BROWSER_CONTENT_BOUNDARIES</code></td><td>Wrap page output in boundary markers</td></tr>
+    <tr><td><code>AGENT_BROWSER_MAX_OUTPUT</code></td><td>Max characters for page output</td></tr>
+    <tr><td><code>AGENT_BROWSER_ALLOWED_DOMAINS</code></td><td>Comma-separated allowed domain patterns</td></tr>
+    <tr><td><code>AGENT_BROWSER_ACTION_POLICY</code></td><td>Path to action policy JSON file</td></tr>
+    <tr><td><code>AGENT_BROWSER_CONFIRM_ACTIONS</code></td><td>Comma-separated action categories requiring confirmation</td></tr>
+    <tr><td><code>AGENT_BROWSER_CONFIRM_INTERACTIVE</code></td><td>Enable interactive confirmation prompts</td></tr>
+    <tr><td><code>AGENT_BROWSER_ENCRYPTION_KEY</code></td><td>64-char hex key for AES-256-GCM encryption (auth vault + sessions)</td></tr>
+  </tbody>
+</table>
+
+## Recommended Configuration
+
+For production AI agent deployments:
+
+```json
+{
+  "contentBoundaries": true,
+  "maxOutput": 50000,
+  "allowedDomains": ["your-app.com", "*.your-app.com"],
+  "actionPolicy": "./policy.json"
+}
+```
diff --git a/docs/src/lib/docs-navigation.ts b/docs/src/lib/docs-navigation.ts
index 4772231..4cf4b14 100644
--- a/docs/src/lib/docs-navigation.ts
+++ b/docs/src/lib/docs-navigation.ts
@@ -35,6 +35,7 @@ export const navigation: NavSection[] = [
       { name: "Streaming", href: "/streaming" },
       { name: "Profiler", href: "/profiler" },
       { name: "iOS Simulator", href: "/ios" },
+      { name: "Security", href: "/security" },
     ],
   },
   {
diff --git a/docs/src/lib/page-titles.ts b/docs/src/lib/page-titles.ts
index a43ff5e..379315b 100644
--- a/docs/src/lib/page-titles.ts
+++ b/docs/src/lib/page-titles.ts
@@ -12,6 +12,7 @@ export const PAGE_TITLES: Record<string, string> = {
   streaming: "Streaming",
   profiler: "Profiler",
   ios: "iOS Simulator",
+  security: "Security",
   changelog: "Changelog",
 };
 
diff --git a/skills/agent-browser/SKILL.md b/skills/agent-browser/SKILL.md
index a7a341a..4a93e3e 100644
--- a/skills/agent-browser/SKILL.md
+++ b/skills/agent-browser/SKILL.md
@@ -120,6 +120,22 @@ agent-browser click @e5
 agent-browser wait --load networkidle
 ```
 
+### Authentication with Auth Vault (Recommended)
+
+```bash
+# Save credentials once (encrypted with AGENT_BROWSER_ENCRYPTION_KEY)
+# Recommended: pipe password via stdin to avoid shell history exposure
+echo "pass" | agent-browser auth save github --url https://github.com/login --username user --password-stdin
+
+# Login using saved profile (LLM never sees password)
+agent-browser auth login github
+
+# List/show/delete profiles
+agent-browser auth list
+agent-browser auth show github
+agent-browser auth delete github
+```
+
 ### Authentication with State Persistence
 
 ```bash
@@ -305,6 +321,56 @@ agent-browser -p ios close
 
 **Real devices:** Works with physical iOS devices if pre-configured. Use `--device "<UDID>"` where UDID is from `xcrun xctrace list devices`.
 
+## Security
+
+All security features are opt-in. By default, agent-browser imposes no restrictions on navigation, actions, or output.
+
+### Content Boundaries (Recommended for AI Agents)
+
+Enable `--content-boundaries` to wrap page-sourced output in markers that help LLMs distinguish tool output from untrusted page content:
+
+```bash
+export AGENT_BROWSER_CONTENT_BOUNDARIES=1
+agent-browser snapshot
+# Output:
+# --- AGENT_BROWSER_PAGE_CONTENT nonce=<hex> origin=https://example.com ---
+# [accessibility tree]
+# --- END_AGENT_BROWSER_PAGE_CONTENT nonce=<hex> ---
+```
+
+### Domain Allowlist
+
+Restrict navigation to trusted domains. Wildcards like `*.example.com` also match the bare domain `example.com`. Sub-resource requests, WebSocket, and EventSource connections to non-allowed domains are also blocked. Include CDN domains your target pages depend on:
+
+```bash
+export AGENT_BROWSER_ALLOWED_DOMAINS="example.com,*.example.com"
+agent-browser open https://example.com        # OK
+agent-browser open https://malicious.com       # Blocked
+```
+
+### Action Policy
+
+Use a policy file to gate destructive actions:
+
+```bash
+export AGENT_BROWSER_ACTION_POLICY=./policy.json
+```
+
+Example `policy.json`:
+```json
+{"default": "deny", "allow": ["navigate", "snapshot", "click", "scroll", "wait", "get"]}
+```
+
+Auth vault operations (`auth login`, etc.) bypass action policy but domain allowlist still applies.
+
+### Output Limits
+
+Prevent context flooding from large pages:
+
+```bash
+export AGENT_BROWSER_MAX_OUTPUT=50000
+```
+
 ## Diffing (Verifying Changes)
 
 Use `diff snapshot` after performing an action to verify it had the intended effect. This compares the current accessibility tree against the last snapshot taken in the session.
diff --git a/skills/agent-browser/templates/authenticated-session.sh b/skills/agent-browser/templates/authenticated-session.sh
index f9984c6..b66c928 100755
--- a/skills/agent-browser/templates/authenticated-session.sh
+++ b/skills/agent-browser/templates/authenticated-session.sh
@@ -3,6 +3,11 @@
 # Purpose: Login once, save state, reuse for subsequent runs
 # Usage: ./authenticated-session.sh <login-url> [state-file]
 #
+# RECOMMENDED: Use the auth vault instead of this template:
+#   echo "<pass>" | agent-browser auth save myapp --url <login-url> --username <user> --password-stdin
+#   agent-browser auth login myapp
+# The auth vault stores credentials securely and the LLM never sees passwords.
+#
 # Environment variables:
 #   APP_USERNAME - Login username/email
 #   APP_PASSWORD - Login password
diff --git a/src/action-policy.test.ts b/src/action-policy.test.ts
new file mode 100644
index 0000000..edc68fe
--- /dev/null
+++ b/src/action-policy.test.ts
@@ -0,0 +1,213 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import {
+  getActionCategory,
+  checkPolicy,
+  loadPolicyFile,
+  describeAction,
+  KNOWN_CATEGORIES,
+  type ActionPolicy,
+} from './action-policy.js';
+
+describe('action-policy', () => {
+  describe('getActionCategory', () => {
+    it('should return correct category for known actions', () => {
+      expect(getActionCategory('navigate')).toBe('navigate');
+      expect(getActionCategory('click')).toBe('click');
+      expect(getActionCategory('fill')).toBe('fill');
+      expect(getActionCategory('evaluate')).toBe('eval');
+      expect(getActionCategory('download')).toBe('download');
+      expect(getActionCategory('upload')).toBe('upload');
+      expect(getActionCategory('snapshot')).toBe('snapshot');
+      expect(getActionCategory('scroll')).toBe('scroll');
+      expect(getActionCategory('wait')).toBe('wait');
+      expect(getActionCategory('gettext')).toBe('get');
+      expect(getActionCategory('route')).toBe('network');
+      expect(getActionCategory('state_save')).toBe('state');
+      expect(getActionCategory('hover')).toBe('interact');
+    });
+
+    it('should return _internal for internal actions', () => {
+      expect(getActionCategory('launch')).toBe('_internal');
+      expect(getActionCategory('close')).toBe('_internal');
+      expect(getActionCategory('session')).toBe('_internal');
+      expect(getActionCategory('auth_save')).toBe('_internal');
+      expect(getActionCategory('confirm')).toBe('_internal');
+    });
+
+    it('should return eval for security-sensitive actions', () => {
+      expect(getActionCategory('setcontent')).toBe('eval');
+      expect(getActionCategory('expose')).toBe('eval');
+      expect(getActionCategory('addstyle')).toBe('eval');
+    });
+
+    it('should return unknown for unrecognized actions', () => {
+      expect(getActionCategory('nonexistent')).toBe('unknown');
+      expect(getActionCategory('')).toBe('unknown');
+    });
+
+    it('should return get for semantic locator actions', () => {
+      expect(getActionCategory('getbyrole')).toBe('get');
+      expect(getActionCategory('getbytext')).toBe('get');
+      expect(getActionCategory('getbylabel')).toBe('get');
+    });
+  });
+
+  describe('checkPolicy', () => {
+    it('should always allow internal actions regardless of policy', () => {
+      const denyAll: ActionPolicy = { default: 'deny' };
+      expect(checkPolicy('launch', denyAll, new Set())).toBe('allow');
+      expect(checkPolicy('close', denyAll, new Set())).toBe('allow');
+      expect(checkPolicy('session', denyAll, new Set())).toBe('allow');
+    });
+
+    it('should allow all when no policy and no confirm categories', () => {
+      expect(checkPolicy('navigate', null, new Set())).toBe('allow');
+      expect(checkPolicy('click', null, new Set())).toBe('allow');
+      expect(checkPolicy('evaluate', null, new Set())).toBe('allow');
+    });
+
+    it('should deny actions in explicit deny list', () => {
+      const policy: ActionPolicy = { default: 'allow', deny: ['eval', 'download'] };
+      expect(checkPolicy('evaluate', policy, new Set())).toBe('deny');
+      expect(checkPolicy('download', policy, new Set())).toBe('deny');
+      expect(checkPolicy('click', policy, new Set())).toBe('allow');
+    });
+
+    it('should allow actions in explicit allow list with deny default', () => {
+      const policy: ActionPolicy = { default: 'deny', allow: ['navigate', 'snapshot'] };
+      expect(checkPolicy('navigate', policy, new Set())).toBe('allow');
+      expect(checkPolicy('snapshot', policy, new Set())).toBe('allow');
+      expect(checkPolicy('click', policy, new Set())).toBe('deny');
+    });
+
+    it('should return confirm for actions in confirm categories', () => {
+      expect(checkPolicy('evaluate', null, new Set(['eval']))).toBe('confirm');
+      expect(checkPolicy('download', null, new Set(['download']))).toBe('confirm');
+    });
+
+    it('should deny over confirm when action is in deny list', () => {
+      const policy: ActionPolicy = { default: 'allow', deny: ['eval'] };
+      expect(checkPolicy('evaluate', policy, new Set(['eval']))).toBe('deny');
+    });
+
+    it('should use default policy for unknown categories', () => {
+      const denyPolicy: ActionPolicy = { default: 'deny' };
+      const allowPolicy: ActionPolicy = { default: 'allow' };
+      expect(checkPolicy('nonexistent', denyPolicy, new Set())).toBe('deny');
+      expect(checkPolicy('nonexistent', allowPolicy, new Set())).toBe('allow');
+    });
+  });
+
+  describe('loadPolicyFile', () => {
+    let tempDir: string;
+
+    beforeEach(() => {
+      tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'action-policy-test-'));
+    });
+
+    afterEach(() => {
+      fs.rmSync(tempDir, { recursive: true, force: true });
+    });
+
+    it('should load a valid allow-default policy', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(policyPath, JSON.stringify({ default: 'allow', deny: ['eval'] }));
+      const policy = loadPolicyFile(policyPath);
+      expect(policy.default).toBe('allow');
+      expect(policy.deny).toEqual(['eval']);
+    });
+
+    it('should load a valid deny-default policy', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(
+        policyPath,
+        JSON.stringify({ default: 'deny', allow: ['navigate', 'snapshot'] })
+      );
+      const policy = loadPolicyFile(policyPath);
+      expect(policy.default).toBe('deny');
+      expect(policy.allow).toEqual(['navigate', 'snapshot']);
+    });
+
+    it('should throw on invalid default value', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(policyPath, JSON.stringify({ default: 'maybe' }));
+      expect(() => loadPolicyFile(policyPath)).toThrow('must be "allow" or "deny"');
+    });
+
+    it('should throw on missing file', () => {
+      expect(() => loadPolicyFile(path.join(tempDir, 'missing.json'))).toThrow();
+    });
+
+    it('should throw on invalid JSON', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(policyPath, 'not json');
+      expect(() => loadPolicyFile(policyPath)).toThrow();
+    });
+
+    it('should warn on unrecognized category names', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(
+        policyPath,
+        JSON.stringify({ default: 'allow', deny: ['eval', 'typo_category'] })
+      );
+      const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+      const policy = loadPolicyFile(policyPath);
+      expect(policy.default).toBe('allow');
+      expect(warnSpy).toHaveBeenCalledWith(
+        expect.stringContaining('unrecognized action category "typo_category"')
+      );
+      warnSpy.mockRestore();
+    });
+
+    it('should not warn on valid category names', () => {
+      const policyPath = path.join(tempDir, 'policy.json');
+      fs.writeFileSync(
+        policyPath,
+        JSON.stringify({ default: 'deny', allow: ['navigate', 'snapshot', 'get'] })
+      );
+      const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+      loadPolicyFile(policyPath);
+      expect(warnSpy).not.toHaveBeenCalled();
+      warnSpy.mockRestore();
+    });
+  });
+
+  describe('describeAction', () => {
+    it('should describe navigate actions', () => {
+      expect(describeAction('navigate', { url: 'https://example.com' })).toBe(
+        'Navigate to https://example.com'
+      );
+    });
+
+    it('should describe eval actions with truncation', () => {
+      const longScript = 'a'.repeat(200);
+      const desc = describeAction('evaluate', { script: longScript });
+      expect(desc).toContain('Evaluate JavaScript:');
+      expect(desc.length).toBeLessThan(200);
+    });
+
+    it('should describe click actions', () => {
+      expect(describeAction('click', { selector: '#btn' })).toBe('Click #btn');
+    });
+
+    it('should describe dblclick actions', () => {
+      expect(describeAction('dblclick', { selector: '#btn' })).toBe('Double-click #btn');
+    });
+
+    it('should describe tap actions', () => {
+      expect(describeAction('tap', { selector: '#btn' })).toBe('Tap #btn');
+    });
+
+    it('should describe fill actions', () => {
+      expect(describeAction('fill', { selector: '#input' })).toBe('Fill #input');
+    });
+
+    it('should use fallback for unknown actions', () => {
+      const desc = describeAction('scroll', {});
+      expect(desc).toContain('scroll');
+    });
+  });
+});
diff --git a/src/action-policy.ts b/src/action-policy.ts
new file mode 100644
index 0000000..b9847d2
--- /dev/null
+++ b/src/action-policy.ts
@@ -0,0 +1,297 @@
+import { readFileSync, statSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+export interface ActionPolicy {
+  default: 'allow' | 'deny';
+  allow?: string[];
+  deny?: string[];
+}
+
+export type PolicyDecision = 'allow' | 'deny' | 'confirm';
+
+const ACTION_CATEGORIES: Record<string, string> = {
+  navigate: 'navigate',
+  back: 'navigate',
+  forward: 'navigate',
+  reload: 'navigate',
+  tab_new: 'navigate',
+
+  click: 'click',
+  dblclick: 'click',
+  tap: 'click',
+
+  fill: 'fill',
+  type: 'fill',
+  // The `keyboard` action is a compound command that dispatches to sub-actions
+  // (type, inserttext, press, down, up). Its primary use is text input, so it
+  // maps to 'fill'. The interact-like sub-actions (press, down, up) are less
+  // common and don't have separate top-level action names in the protocol.
+  keyboard: 'fill',
+  inserttext: 'fill',
+  select: 'fill',
+  multiselect: 'fill',
+  check: 'fill',
+  uncheck: 'fill',
+  clear: 'fill',
+  selectall: 'fill',
+  setvalue: 'fill',
+
+  download: 'download',
+  waitfordownload: 'download',
+
+  upload: 'upload',
+
+  evaluate: 'eval',
+  evalhandle: 'eval',
+  addscript: 'eval',
+  addinitscript: 'eval',
+
+  snapshot: 'snapshot',
+  screenshot: 'snapshot',
+  pdf: 'snapshot',
+  diff_snapshot: 'snapshot',
+  diff_screenshot: 'snapshot',
+  diff_url: 'snapshot',
+
+  scroll: 'scroll',
+  scrollintoview: 'scroll',
+
+  wait: 'wait',
+  waitforurl: 'wait',
+  waitforloadstate: 'wait',
+  waitforfunction: 'wait',
+
+  gettext: 'get',
+  content: 'get',
+  innerhtml: 'get',
+  innertext: 'get',
+  inputvalue: 'get',
+  url: 'get',
+  title: 'get',
+  getattribute: 'get',
+  count: 'get',
+  boundingbox: 'get',
+  styles: 'get',
+  isvisible: 'get',
+  isenabled: 'get',
+  ischecked: 'get',
+  responsebody: 'get',
+
+  route: 'network',
+  unroute: 'network',
+  requests: 'network',
+
+  state_save: 'state',
+  state_load: 'state',
+  cookies_set: 'state',
+  storage_set: 'state',
+  credentials: 'state',
+
+  hover: 'interact',
+  focus: 'interact',
+  drag: 'interact',
+  press: 'interact',
+  keydown: 'interact',
+  keyup: 'interact',
+  mousemove: 'interact',
+  mousedown: 'interact',
+  mouseup: 'interact',
+  wheel: 'interact',
+  dispatch: 'interact',
+
+  // These are always allowed (internal/meta operations)
+  launch: '_internal',
+  close: '_internal',
+  tab_list: '_internal',
+  tab_switch: '_internal',
+  tab_close: '_internal',
+  window_new: '_internal',
+  frame: '_internal',
+  mainframe: '_internal',
+  dialog: '_internal',
+  session: '_internal',
+  console: '_internal',
+  errors: '_internal',
+  cookies_get: '_internal',
+  cookies_clear: '_internal',
+  storage_get: '_internal',
+  storage_clear: '_internal',
+  state_list: '_internal',
+  state_show: '_internal',
+  state_clear: '_internal',
+  state_clean: '_internal',
+  state_rename: '_internal',
+  highlight: '_internal',
+  bringtofront: '_internal',
+  trace_start: '_internal',
+  trace_stop: '_internal',
+  har_start: '_internal',
+  har_stop: '_internal',
+  video_start: '_internal',
+  video_stop: '_internal',
+  recording_start: '_internal',
+  recording_stop: '_internal',
+  recording_restart: '_internal',
+  profiler_start: '_internal',
+  profiler_stop: '_internal',
+  clipboard: '_internal',
+  viewport: '_internal',
+  useragent: '_internal',
+  device: '_internal',
+  geolocation: '_internal',
+  permissions: '_internal',
+  emulatemedia: '_internal',
+  offline: '_internal',
+  headers: '_internal',
+  addstyle: 'eval',
+  expose: 'eval',
+  timezone: '_internal',
+  locale: '_internal',
+  pause: '_internal',
+  setcontent: 'eval',
+  screencast_start: '_internal',
+  screencast_stop: '_internal',
+  input_mouse: '_internal',
+  input_keyboard: '_internal',
+  input_touch: '_internal',
+
+  auth_save: '_internal',
+  auth_login: '_internal',
+  auth_list: '_internal',
+  auth_delete: '_internal',
+  auth_show: '_internal',
+  confirm: '_internal',
+  deny: '_internal',
+
+  // Find/semantic locator actions (read-only element resolution)
+  getbyrole: 'get',
+  getbytext: 'get',
+  getbylabel: 'get',
+  getbyplaceholder: 'get',
+  getbyalttext: 'get',
+  getbytitle: 'get',
+  getbytestid: 'get',
+  nth: 'get',
+};
+
+// User-facing categories used in policy files. '_internal' is excluded because
+// internal actions always bypass policy. 'unknown' is intentionally not a value
+// in ACTION_CATEGORIES -- it is only the fallback return of getActionCategory()
+// for unrecognized actions. If a user puts "unknown" in a policy file,
+// loadPolicyFile will warn about it as unrecognized, which is correct.
+export const KNOWN_CATEGORIES = new Set(
+  Object.values(ACTION_CATEGORIES).filter((c) => c !== '_internal')
+);
+
+export function getActionCategory(action: string): string {
+  return ACTION_CATEGORIES[action] ?? 'unknown';
+}
+
+export function loadPolicyFile(policyPath: string): ActionPolicy {
+  const resolved = resolve(policyPath);
+  const content = readFileSync(resolved, 'utf-8');
+  const policy = JSON.parse(content) as ActionPolicy;
+
+  if (policy.default !== 'allow' && policy.default !== 'deny') {
+    throw new Error(
+      `Invalid action policy: "default" must be "allow" or "deny", got "${policy.default}"`
+    );
+  }
+
+  for (const list of [policy.allow, policy.deny]) {
+    if (!list) continue;
+    for (const category of list) {
+      if (!KNOWN_CATEGORIES.has(category)) {
+        console.warn(
+          `[agent-browser] Warning: unrecognized action category "${category}" in policy file. ` +
+            `Known categories: ${[...KNOWN_CATEGORIES].sort().join(', ')}`
+        );
+      }
+    }
+  }
+
+  return policy;
+}
+
+let cachedPolicyPath: string | null = null;
+let cachedPolicyMtimeMs = 0;
+let cachedPolicy: ActionPolicy | null = null;
+const RELOAD_CHECK_INTERVAL_MS = 5_000;
+let lastCheckMs = 0;
+
+export function initPolicyReloader(policyPath: string, policy: ActionPolicy): void {
+  cachedPolicyPath = resolve(policyPath);
+  cachedPolicyMtimeMs = statSync(cachedPolicyPath).mtimeMs;
+  cachedPolicy = policy;
+}
+
+export function reloadPolicyIfChanged(): ActionPolicy | null {
+  if (!cachedPolicyPath) return cachedPolicy;
+
+  const now = Date.now();
+  if (now - lastCheckMs < RELOAD_CHECK_INTERVAL_MS) return cachedPolicy;
+  lastCheckMs = now;
+
+  try {
+    const currentMtime = statSync(cachedPolicyPath).mtimeMs;
+    if (currentMtime !== cachedPolicyMtimeMs) {
+      cachedPolicy = loadPolicyFile(cachedPolicyPath);
+      cachedPolicyMtimeMs = currentMtime;
+    }
+  } catch {
+    // File may have been removed; keep using cached policy
+  }
+
+  return cachedPolicy;
+}
+
+export function checkPolicy(
+  action: string,
+  policy: ActionPolicy | null,
+  confirmCategories: Set<string>
+): PolicyDecision {
+  const category = getActionCategory(action);
+
+  // Internal actions are always allowed
+  if (category === '_internal') return 'allow';
+
+  // Explicit deny takes precedence over confirmation
+  if (policy?.deny?.includes(category)) return 'deny';
+
+  // Check if this category requires confirmation
+  if (confirmCategories.has(category)) return 'confirm';
+
+  if (!policy) return 'allow';
+
+  // Explicit allow list
+  if (policy.allow?.includes(category)) return 'allow';
+
+  return policy.default;
+}
+
+export function describeAction(action: string, command: Record<string, unknown>): string {
+  const category = getActionCategory(action);
+  switch (action) {
+    case 'navigate':
+      return `Navigate to ${command.url}`;
+    case 'evaluate':
+    case 'evalhandle':
+      return `Evaluate JavaScript: ${String(command.script ?? '').slice(0, 80)}`;
+    case 'fill':
+      return `Fill ${command.selector}`;
+    case 'type':
+      return `Type into ${command.selector}`;
+    case 'click':
+      return `Click ${command.selector}`;
+    case 'dblclick':
+      return `Double-click ${command.selector}`;
+    case 'tap':
+      return `Tap ${command.selector}`;
+    case 'download':
+      return `Download via ${command.selector} to ${command.path}`;
+    case 'upload':
+      return `Upload files to ${command.selector}`;
+    default:
+      return `${category}: ${action}`;
+  }
+}
diff --git a/src/auth-cli.ts b/src/auth-cli.ts
new file mode 100644
index 0000000..61f3df0
--- /dev/null
+++ b/src/auth-cli.ts
@@ -0,0 +1,120 @@
+/**
+ * Standalone CLI entry point for auth vault operations that don't need a browser.
+ * Invoked directly by the Rust CLI to avoid sending passwords through the daemon channel.
+ *
+ * Usage: node auth-cli.js <json-command>
+ * Prints a JSON response to stdout and exits.
+ */
+import {
+  saveAuthProfile,
+  getAuthProfileMeta,
+  listAuthProfiles,
+  deleteAuthProfile,
+} from './auth-vault.js';
+
+interface AuthCommand {
+  id: string;
+  action: string;
+  name?: string;
+  url?: string;
+  username?: string;
+  password?: string;
+  usernameSelector?: string;
+  passwordSelector?: string;
+  submitSelector?: string;
+}
+
+function success(id: string, data: Record<string, unknown>): string {
+  return JSON.stringify({ success: true, id, data });
+}
+
+function error(id: string, message: string): string {
+  return JSON.stringify({ success: false, id, error: message });
+}
+
+function run(): void {
+  const input = process.argv[2];
+  if (!input) {
+    process.stderr.write('Usage: node auth-cli.js <json-command>\n');
+    process.exit(1);
+  }
+
+  let cmd: AuthCommand;
+  try {
+    cmd = JSON.parse(input);
+  } catch {
+    console.log(error('', 'Invalid JSON input'));
+    process.exit(1);
+    return;
+  }
+
+  const id = cmd.id || '';
+
+  try {
+    switch (cmd.action) {
+      case 'auth_save': {
+        if (!cmd.name || !cmd.url || !cmd.username || !cmd.password) {
+          console.log(error(id, 'Missing required fields: name, url, username, password'));
+          return;
+        }
+        const meta = saveAuthProfile({
+          name: cmd.name,
+          url: cmd.url,
+          username: cmd.username,
+          password: cmd.password,
+          usernameSelector: cmd.usernameSelector,
+          passwordSelector: cmd.passwordSelector,
+          submitSelector: cmd.submitSelector,
+        });
+        console.log(
+          success(id, {
+            saved: !meta.updated,
+            updated: meta.updated,
+            name: meta.name,
+            url: meta.url,
+            username: meta.username,
+          })
+        );
+        return;
+      }
+      case 'auth_list': {
+        const profiles = listAuthProfiles();
+        console.log(success(id, { profiles }));
+        return;
+      }
+      case 'auth_show': {
+        if (!cmd.name) {
+          console.log(error(id, 'Missing required field: name'));
+          return;
+        }
+        const meta = getAuthProfileMeta(cmd.name);
+        if (!meta) {
+          console.log(error(id, `Auth profile '${cmd.name}' not found`));
+          return;
+        }
+        console.log(success(id, { profile: meta }));
+        return;
+      }
+      case 'auth_delete': {
+        if (!cmd.name) {
+          console.log(error(id, 'Missing required field: name'));
+          return;
+        }
+        const deleted = deleteAuthProfile(cmd.name);
+        if (!deleted) {
+          console.log(error(id, `Auth profile '${cmd.name}' not found`));
+          return;
+        }
+        console.log(success(id, { deleted: true, name: cmd.name }));
+        return;
+      }
+      default:
+        console.log(error(id, `Unknown auth action: ${cmd.action}`));
+    }
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : 'Operation failed';
+    console.log(error(id, msg));
+  }
+}
+
+run();
diff --git a/src/auth-vault.test.ts b/src/auth-vault.test.ts
new file mode 100644
index 0000000..5e298fe
--- /dev/null
+++ b/src/auth-vault.test.ts
@@ -0,0 +1,278 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+
+let tempHome: string;
+
+vi.mock('node:os', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('os')>();
+  return {
+    ...actual,
+    default: {
+      ...actual,
+      homedir: () => tempHome,
+    },
+    homedir: () => tempHome,
+  };
+});
+
+import {
+  saveAuthProfile,
+  getAuthProfile,
+  getAuthProfileMeta,
+  listAuthProfiles,
+  deleteAuthProfile,
+  updateLastLogin,
+} from './auth-vault.js';
+
+describe('auth-vault', () => {
+  beforeEach(() => {
+    tempHome = fs.mkdtempSync(path.join(os.tmpdir(), 'agent-browser-auth-test-'));
+    delete process.env.AGENT_BROWSER_ENCRYPTION_KEY;
+  });
+
+  afterEach(() => {
+    try {
+      fs.rmSync(tempHome, { recursive: true, force: true });
+    } catch {
+      // ignore cleanup errors
+    }
+  });
+
+  function cleanAuthDir() {
+    const authDir = path.join(tempHome, '.agent-browser', 'auth');
+    if (fs.existsSync(authDir)) {
+      for (const f of fs.readdirSync(authDir)) {
+        fs.unlinkSync(path.join(authDir, f));
+      }
+    }
+  }
+
+  describe('saveAuthProfile', () => {
+    it('should save a new profile', () => {
+      const result = saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user',
+        password: 'pass',
+      });
+
+      expect(result.name).toBe('github');
+      expect(result.url).toBe('https://github.com/login');
+      expect(result.username).toBe('user');
+      expect(result.updated).toBe(false);
+      expect(result.createdAt).toBeTruthy();
+    });
+
+    it('should mark as updated when overwriting', () => {
+      saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user1',
+        password: 'pass1',
+      });
+
+      const result = saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user2',
+        password: 'pass2',
+      });
+
+      expect(result.updated).toBe(true);
+      expect(result.username).toBe('user2');
+    });
+
+    it('should preserve createdAt on update', () => {
+      const first = saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user',
+        password: 'pass',
+      });
+
+      const second = saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user2',
+        password: 'pass2',
+      });
+
+      expect(second.createdAt).toBe(first.createdAt);
+    });
+
+    it('should save with custom selectors', () => {
+      saveAuthProfile({
+        name: 'myapp',
+        url: 'https://example.com/login',
+        username: 'user',
+        password: 'pass',
+        usernameSelector: '#email',
+        passwordSelector: '#password',
+        submitSelector: 'button.login',
+      });
+
+      const profile = getAuthProfile('myapp');
+      expect(profile).not.toBeNull();
+      expect(profile!.usernameSelector).toBe('#email');
+      expect(profile!.passwordSelector).toBe('#password');
+      expect(profile!.submitSelector).toBe('button.login');
+    });
+
+    it('should reject invalid profile names', () => {
+      expect(() =>
+        saveAuthProfile({
+          name: '../escape',
+          url: 'https://example.com',
+          username: 'user',
+          password: 'pass',
+        })
+      ).toThrow('only alphanumeric');
+    });
+  });
+
+  describe('getAuthProfile', () => {
+    it('should return null for non-existent profile', () => {
+      expect(getAuthProfile('nonexistent')).toBeNull();
+    });
+
+    it('should return full profile with password', () => {
+      saveAuthProfile({
+        name: 'test',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'secret',
+      });
+
+      const profile = getAuthProfile('test');
+      expect(profile).not.toBeNull();
+      expect(profile!.password).toBe('secret');
+    });
+  });
+
+  describe('getAuthProfileMeta', () => {
+    it('should return metadata without password', () => {
+      saveAuthProfile({
+        name: 'test',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'secret',
+      });
+
+      const meta = getAuthProfileMeta('test');
+      expect(meta).not.toBeNull();
+      expect(meta!.name).toBe('test');
+      expect(meta!.username).toBe('user');
+      expect((meta as Record<string, unknown>).password).toBeUndefined();
+    });
+
+    it('should return null for non-existent profile', () => {
+      expect(getAuthProfileMeta('nonexistent')).toBeNull();
+    });
+  });
+
+  describe('listAuthProfiles', () => {
+    it('should return empty array when no profiles', () => {
+      cleanAuthDir();
+      expect(listAuthProfiles()).toEqual([]);
+    });
+
+    it('should list all saved profiles', () => {
+      cleanAuthDir();
+      saveAuthProfile({
+        name: 'github',
+        url: 'https://github.com/login',
+        username: 'user1',
+        password: 'pass1',
+      });
+      saveAuthProfile({
+        name: 'gitlab',
+        url: 'https://gitlab.com/login',
+        username: 'user2',
+        password: 'pass2',
+      });
+
+      const profiles = listAuthProfiles();
+      expect(profiles).toHaveLength(2);
+      const names = profiles.map((p) => p.name).sort();
+      expect(names).toEqual(['github', 'gitlab']);
+    });
+  });
+
+  describe('deleteAuthProfile', () => {
+    it('should delete an existing profile', () => {
+      saveAuthProfile({
+        name: 'test',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'pass',
+      });
+
+      expect(deleteAuthProfile('test')).toBe(true);
+      expect(getAuthProfile('test')).toBeNull();
+    });
+
+    it('should return false for non-existent profile', () => {
+      expect(deleteAuthProfile('nonexistent')).toBe(false);
+    });
+  });
+
+  describe('updateLastLogin', () => {
+    it('should update lastLoginAt timestamp', () => {
+      saveAuthProfile({
+        name: 'test',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'pass',
+      });
+
+      const metaBefore = getAuthProfileMeta('test');
+      expect(metaBefore!.lastLoginAt).toBeUndefined();
+
+      updateLastLogin('test');
+
+      const metaAfter = getAuthProfileMeta('test');
+      expect(metaAfter!.lastLoginAt).toBeTruthy();
+    });
+  });
+
+  describe('auto-generated encryption key', () => {
+    it('should auto-create key file and encrypt profile when no env var is set', () => {
+      delete process.env.AGENT_BROWSER_ENCRYPTION_KEY;
+
+      saveAuthProfile({
+        name: 'autokey',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'secret',
+      });
+
+      const keyFilePath = path.join(tempHome, '.agent-browser', '.encryption-key');
+      expect(fs.existsSync(keyFilePath)).toBe(true);
+
+      const keyHex = fs.readFileSync(keyFilePath, 'utf-8').trim();
+      expect(keyHex).toMatch(/^[a-f0-9]{64}$/);
+
+      const profilePath = path.join(tempHome, '.agent-browser', 'auth', 'autokey.json');
+      const raw = JSON.parse(fs.readFileSync(profilePath, 'utf-8'));
+      expect(raw.encrypted).toBe(true);
+      expect(raw.iv).toBeTruthy();
+    });
+
+    it('should read back profile using auto-generated key', () => {
+      delete process.env.AGENT_BROWSER_ENCRYPTION_KEY;
+
+      saveAuthProfile({
+        name: 'readback',
+        url: 'https://example.com',
+        username: 'user',
+        password: 'secret123',
+      });
+
+      const profile = getAuthProfile('readback');
+      expect(profile).not.toBeNull();
+      expect(profile!.password).toBe('secret123');
+    });
+  });
+});
diff --git a/src/auth-vault.ts b/src/auth-vault.ts
new file mode 100644
index 0000000..577b4fd
--- /dev/null
+++ b/src/auth-vault.ts
@@ -0,0 +1,189 @@
+import {
+  existsSync,
+  mkdirSync,
+  readFileSync,
+  writeFileSync,
+  readdirSync,
+  unlinkSync,
+} from 'node:fs';
+import path from 'node:path';
+import os from 'node:os';
+import {
+  getEncryptionKey,
+  ensureEncryptionKey,
+  encryptData,
+  decryptData,
+  isEncryptedPayload,
+  getKeyFilePath,
+  restrictFilePermissions,
+  restrictDirPermissions,
+  type EncryptedPayload,
+} from './encryption.js';
+
+const AUTH_DIR = 'auth';
+
+interface AuthProfile {
+  name: string;
+  url: string;
+  username: string;
+  password: string;
+  usernameSelector?: string;
+  passwordSelector?: string;
+  submitSelector?: string;
+  createdAt: string;
+  lastLoginAt?: string;
+}
+
+export interface AuthProfileMeta {
+  name: string;
+  url: string;
+  username: string;
+  createdAt: string;
+  lastLoginAt?: string;
+}
+
+function getAuthDir(): string {
+  const dir = path.join(os.homedir(), '.agent-browser', AUTH_DIR);
+  if (!existsSync(dir)) {
+    mkdirSync(dir, { recursive: true, mode: 0o700 });
+    restrictDirPermissions(dir);
+  }
+  return dir;
+}
+
+const SAFE_NAME_RE = /^[a-zA-Z0-9_-]+$/;
+
+function validateProfileName(name: string): void {
+  if (!SAFE_NAME_RE.test(name)) {
+    throw new Error(
+      `Invalid auth profile name '${name}': only alphanumeric characters, hyphens, and underscores are allowed`
+    );
+  }
+}
+
+function profilePath(name: string): string {
+  validateProfileName(name);
+  return path.join(getAuthDir(), `${name}.json`);
+}
+
+function readProfile(name: string): AuthProfile | null {
+  const p = profilePath(name);
+  if (!existsSync(p)) return null;
+
+  const raw = readFileSync(p, 'utf-8');
+  const parsed = JSON.parse(raw);
+
+  if (isEncryptedPayload(parsed)) {
+    const key = getEncryptionKey();
+    if (!key) {
+      throw new Error(
+        `Encryption key required to read encrypted auth profiles. ` +
+          `Set AGENT_BROWSER_ENCRYPTION_KEY or ensure ${getKeyFilePath()} exists.`
+      );
+    }
+    const decrypted = decryptData(parsed as EncryptedPayload, key);
+    return JSON.parse(decrypted) as AuthProfile;
+  }
+
+  return parsed as AuthProfile;
+}
+
+function writeProfile(profile: AuthProfile): void {
+  const key = ensureEncryptionKey();
+  const serialized = JSON.stringify(profile, null, 2);
+  const encrypted = encryptData(serialized, key);
+  const filePath = profilePath(profile.name);
+  writeFileSync(filePath, JSON.stringify(encrypted, null, 2), {
+    mode: 0o600,
+  });
+  restrictFilePermissions(filePath);
+}
+
+export function saveAuthProfile(opts: {
+  name: string;
+  url: string;
+  username: string;
+  password: string;
+  usernameSelector?: string;
+  passwordSelector?: string;
+  submitSelector?: string;
+}): AuthProfileMeta & { updated: boolean } {
+  const existing = readProfile(opts.name);
+
+  const profile: AuthProfile = {
+    name: opts.name,
+    url: opts.url,
+    username: opts.username,
+    password: opts.password,
+    usernameSelector: opts.usernameSelector,
+    passwordSelector: opts.passwordSelector,
+    submitSelector: opts.submitSelector,
+    createdAt: existing?.createdAt ?? new Date().toISOString(),
+    lastLoginAt: existing?.lastLoginAt,
+  };
+
+  writeProfile(profile);
+
+  return {
+    name: profile.name,
+    url: profile.url,
+    username: profile.username,
+    createdAt: profile.createdAt,
+    lastLoginAt: profile.lastLoginAt,
+    updated: existing !== null,
+  };
+}
+
+export function getAuthProfile(name: string): AuthProfile | null {
+  return readProfile(name);
+}
+
+export function getAuthProfileMeta(name: string): AuthProfileMeta | null {
+  const profile = readProfile(name);
+  if (!profile) return null;
+  return {
+    name: profile.name,
+    url: profile.url,
+    username: profile.username,
+    createdAt: profile.createdAt,
+    lastLoginAt: profile.lastLoginAt,
+  };
+}
+
+export function listAuthProfiles(): AuthProfileMeta[] {
+  const dir = getAuthDir();
+  const files = readdirSync(dir).filter((f) => f.endsWith('.json'));
+  const profiles: AuthProfileMeta[] = [];
+
+  for (const file of files) {
+    const name = file.replace(/\.json$/, '');
+    try {
+      const meta = getAuthProfileMeta(name);
+      if (meta) profiles.push(meta);
+    } catch {
+      profiles.push({
+        name,
+        url: '(encrypted)',
+        username: '(encrypted)',
+        createdAt: '(unknown)',
+      });
+    }
+  }
+
+  return profiles;
+}
+
+export function deleteAuthProfile(name: string): boolean {
+  const p = profilePath(name);
+  if (!existsSync(p)) return false;
+  unlinkSync(p);
+  return true;
+}
+
+export function updateLastLogin(name: string): void {
+  const profile = readProfile(name);
+  if (profile) {
+    profile.lastLoginAt = new Date().toISOString();
+    writeProfile(profile);
+  }
+}
diff --git a/src/browser.ts b/src/browser.ts
index e6f3e89..933398a 100644
--- a/src/browser.ts
+++ b/src/browser.ts
@@ -21,6 +21,7 @@ import { writeFile, mkdir } from 'node:fs/promises';
 import type { LaunchCommand, TraceEvent } from './types.js';
 import { type RefMap, type EnhancedSnapshot, getEnhancedSnapshot, parseRef } from './snapshot.js';
 import { safeHeaderMerge } from './state-utils.js';
+import { isDomainAllowed, installDomainFilter, parseDomainList } from './domain-filter.js';
 import {
   getEncryptionKey,
   isEncryptedPayload,
@@ -161,6 +162,7 @@ export class BrowserManager {
   private contextHeaders: Record<string, string> | undefined = undefined;
   private contextUserAgent: string | undefined = undefined;
   private downloadPath: string | null = null;
+  private allowedDomains: string[] = [];
 
   /**
    * Set the persistent color scheme preference.
@@ -573,6 +575,61 @@ export class BrowserManager {
     return parseRef(selector) !== null;
   }
 
+  /**
+   * Install the domain filter on a context if an allowlist is configured.
+   * Should be called before any pages navigate on the context.
+   */
+  private async ensureDomainFilter(context: BrowserContext): Promise<void> {
+    if (this.allowedDomains.length > 0) {
+      await installDomainFilter(context, this.allowedDomains);
+    }
+  }
+
+  /**
+   * After installing the domain filter, verify existing pages are on allowed
+   * domains. Pages that pre-date the filter (e.g. CDP/cloud connect) may have
+   * already navigated to disallowed domains. Navigate them to about:blank.
+   */
+  private async sanitizeExistingPages(pages: Page[]): Promise<void> {
+    if (this.allowedDomains.length === 0) return;
+    for (const page of pages) {
+      const url = page.url();
+      if (!url || url === 'about:blank') continue;
+      try {
+        const hostname = new URL(url).hostname.toLowerCase();
+        if (!isDomainAllowed(hostname, this.allowedDomains)) {
+          await page.goto('about:blank');
+        }
+      } catch {
+        await page.goto('about:blank').catch(() => {});
+      }
+    }
+  }
+
+  /**
+   * Check if a URL is allowed by the domain allowlist.
+   * Throws if the URL's domain is blocked. No-op if no allowlist is set.
+   * Blocks non-http(s) schemes and unparseable URLs by default.
+   */
+  checkDomainAllowed(url: string): void {
+    if (this.allowedDomains.length === 0) return;
+
+    if (!url.startsWith('http://') && !url.startsWith('https://')) {
+      throw new Error(`Navigation blocked: non-http(s) scheme in URL "${url}"`);
+    }
+
+    let hostname: string;
+    try {
+      hostname = new URL(url).hostname.toLowerCase();
+    } catch {
+      throw new Error(`Navigation blocked: unable to parse URL "${url}"`);
+    }
+
+    if (!isDomainAllowed(hostname, this.allowedDomains)) {
+      throw new Error(`Navigation blocked: ${hostname} is not in the allowed domains list`);
+    }
+  }
+
   /**
    * Get locator - supports both refs and regular selectors
    */
@@ -645,6 +702,7 @@ export class BrowserManager {
       context.setDefaultTimeout(getDefaultTimeout());
       this.contexts.push(context);
       this.setupContextTracking(context);
+      await this.ensureDomainFilter(context);
     } else {
       return;
     }
@@ -1278,6 +1336,8 @@ export class BrowserManager {
       context.setDefaultTimeout(10000);
       this.contexts.push(context);
       this.setupContextTracking(context);
+      await this.ensureDomainFilter(context);
+      await this.sanitizeExistingPages([page]);
       this.pages.push(page);
       this.activePageIndex = 0;
       this.setupPageTracking(page);
@@ -1421,10 +1481,12 @@ export class BrowserManager {
       this.browser = browser;
       context.setDefaultTimeout(getDefaultTimeout());
       this.contexts.push(context);
+      this.setupContextTracking(context);
+      await this.ensureDomainFilter(context);
+      await this.sanitizeExistingPages([page]);
       this.pages.push(page);
       this.activePageIndex = 0;
       this.setupPageTracking(page);
-      this.setupContextTracking(context);
     } catch (error) {
       await this.closeKernelSession(session.session_id, kernelApiKey).catch((sessionError) => {
         console.error('Failed to close Kernel session during cleanup:', sessionError);
@@ -1497,10 +1559,12 @@ export class BrowserManager {
       this.browser = browser;
       context.setDefaultTimeout(getDefaultTimeout());
       this.contexts.push(context);
+      this.setupContextTracking(context);
+      await this.ensureDomainFilter(context);
+      await this.sanitizeExistingPages([page]);
       this.pages.push(page);
       this.activePageIndex = 0;
       this.setupPageTracking(page);
-      this.setupContextTracking(context);
     } catch (error) {
       await this.closeBrowserUseSession(session.id, browserUseApiKey).catch((sessionError) => {
         console.error('Failed to close Browser Use session during cleanup:', sessionError);
@@ -1572,6 +1636,15 @@ export class BrowserManager {
       this.downloadPath = options.downloadPath;
     }
 
+    if (options.allowedDomains && options.allowedDomains.length > 0) {
+      this.allowedDomains = options.allowedDomains.map((d: string) => d.toLowerCase());
+    } else {
+      const envDomains = process.env.AGENT_BROWSER_ALLOWED_DOMAINS;
+      if (envDomains) {
+        this.allowedDomains = parseDomainList(envDomains);
+      }
+    }
+
     if (this.downloadPath && (cdpEndpoint || options.autoConnect)) {
       const warning =
         "--download-path is ignored when connecting via CDP or auto-connect (downloads use the remote browser's configuration)";
@@ -1832,8 +1905,10 @@ export class BrowserManager {
     context.setDefaultTimeout(getDefaultTimeout());
     this.contexts.push(context);
     this.setupContextTracking(context);
+    await this.ensureDomainFilter(context);
 
     const page = context.pages()[0] ?? (await context.newPage());
+    await this.sanitizeExistingPages([page]);
     // Only add if not already tracked (setupContextTracking may have already added it via 'page' event)
     if (!this.pages.includes(page)) {
       this.pages.push(page);
@@ -1930,8 +2005,11 @@ export class BrowserManager {
         context.setDefaultTimeout(10000);
         this.contexts.push(context);
         this.setupContextTracking(context);
+        await this.ensureDomainFilter(context);
       }
 
+      await this.sanitizeExistingPages(allPages);
+
       for (const page of allPages) {
         this.pages.push(page);
         this.setupPageTracking(page);
@@ -2200,6 +2278,7 @@ export class BrowserManager {
     context.setDefaultTimeout(getDefaultTimeout());
     this.contexts.push(context);
     this.setupContextTracking(context);
+    await this.ensureDomainFilter(context);
 
     const page = await context.newPage();
     // Only add if not already tracked (setupContextTracking may have already added it via 'page' event)
diff --git a/src/confirmation.test.ts b/src/confirmation.test.ts
new file mode 100644
index 0000000..f2553ab
--- /dev/null
+++ b/src/confirmation.test.ts
@@ -0,0 +1,67 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { requestConfirmation, getAndRemovePending } from './confirmation.js';
+
+describe('confirmation', () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  describe('requestConfirmation', () => {
+    it('should return a confirmation ID', () => {
+      const result = requestConfirmation('evaluate', 'eval', 'Evaluate JS', { script: 'test' });
+      expect(result.confirmationId).toBeTruthy();
+      expect(result.confirmationId).toMatch(/^c_[0-9a-f]{16}$/);
+    });
+
+    it('should generate unique IDs', () => {
+      const r1 = requestConfirmation('evaluate', 'eval', 'desc', {});
+      const r2 = requestConfirmation('click', 'click', 'desc', {});
+      expect(r1.confirmationId).not.toBe(r2.confirmationId);
+    });
+  });
+
+  describe('getAndRemovePending', () => {
+    it('should retrieve and remove a pending confirmation', () => {
+      const { confirmationId } = requestConfirmation('evaluate', 'eval', 'desc', {
+        action: 'evaluate',
+        script: 'test',
+      });
+
+      const entry = getAndRemovePending(confirmationId);
+      expect(entry).not.toBeNull();
+      expect(entry!.action).toBe('evaluate');
+      expect(entry!.command).toEqual({ action: 'evaluate', script: 'test' });
+    });
+
+    it('should return null on second retrieval (already removed)', () => {
+      const { confirmationId } = requestConfirmation('evaluate', 'eval', 'desc', {});
+      getAndRemovePending(confirmationId);
+      expect(getAndRemovePending(confirmationId)).toBeNull();
+    });
+
+    it('should return null for non-existent ID', () => {
+      expect(getAndRemovePending('c_nonexistent')).toBeNull();
+    });
+
+    it('should auto-deny after 60 seconds', () => {
+      const { confirmationId } = requestConfirmation('evaluate', 'eval', 'desc', {});
+
+      vi.advanceTimersByTime(60_000);
+
+      expect(getAndRemovePending(confirmationId)).toBeNull();
+    });
+
+    it('should still be retrievable before 60 second timeout', () => {
+      const { confirmationId } = requestConfirmation('evaluate', 'eval', 'desc', {});
+
+      vi.advanceTimersByTime(59_999);
+
+      const entry = getAndRemovePending(confirmationId);
+      expect(entry).not.toBeNull();
+    });
+  });
+});
diff --git a/src/confirmation.ts b/src/confirmation.ts
new file mode 100644
index 0000000..04b00cf
--- /dev/null
+++ b/src/confirmation.ts
@@ -0,0 +1,53 @@
+import { randomBytes } from 'node:crypto';
+
+interface PendingConfirmation {
+  id: string;
+  action: string;
+  category: string;
+  description: string;
+  command: Record<string, unknown>;
+  timer: ReturnType<typeof setTimeout>;
+}
+
+const AUTO_DENY_TIMEOUT_MS = 60_000;
+
+const pending = new Map<string, PendingConfirmation>();
+
+function generateId(): string {
+  return `c_${randomBytes(8).toString('hex')}`;
+}
+
+export function requestConfirmation(
+  action: string,
+  category: string,
+  description: string,
+  command: Record<string, unknown>
+): { confirmationId: string } {
+  const id = generateId();
+
+  const timer = setTimeout(() => {
+    pending.delete(id);
+  }, AUTO_DENY_TIMEOUT_MS);
+
+  pending.set(id, {
+    id,
+    action,
+    category,
+    description,
+    command,
+    timer,
+  });
+
+  return { confirmationId: id };
+}
+
+export function getAndRemovePending(
+  id: string
+): { command: Record<string, unknown>; action: string } | null {
+  const entry = pending.get(id);
+  if (!entry) return null;
+
+  clearTimeout(entry.timer);
+  pending.delete(id);
+  return { command: entry.command, action: entry.action };
+}
diff --git a/src/daemon.ts b/src/daemon.ts
index 81243b0..ee2bf6f 100644
--- a/src/daemon.ts
+++ b/src/daemon.ts
@@ -5,7 +5,7 @@ import * as os from 'os';
 import { BrowserManager } from './browser.js';
 import { IOSManager } from './ios-manager.js';
 import { parseCommand, serializeResponse, errorResponse } from './protocol.js';
-import { executeCommand } from './actions.js';
+import { executeCommand, initActionPolicy } from './actions.js';
 import { executeIOSCommand } from './ios-actions.js';
 import { StreamServer } from './stream-server.js';
 import {
@@ -333,6 +333,9 @@ export async function startDaemon(options?: {
   // Clean up expired state files on startup
   runCleanupExpiredStates();
 
+  // Initialize action policy enforcement
+  initActionPolicy();
+
   // Determine provider from options or environment
   const provider = options?.provider ?? process.env.AGENT_BROWSER_PROVIDER;
   const isIOS = provider === 'ios';
@@ -630,9 +633,13 @@ export async function startDaemon(options?: {
       processQueue().catch((err) => {
         // Socket write failures during queue processing are non-fatal;
         // the client has likely disconnected.
-        console.warn('[warn] processQueue error:', err?.message ?? err);
+        // Only log err.message to avoid leaking sensitive fields (e.g. passwords) from command objects.
+        console.warn('[warn] processQueue error:', err?.message ?? String(err));
         if (process.env.AGENT_BROWSER_DEBUG === '1') {
-          console.error('[DEBUG] processQueue error (full):', err);
+          console.error(
+            '[DEBUG] processQueue error stack:',
+            err?.stack ?? err?.message ?? String(err)
+          );
         }
       });
     });
diff --git a/src/domain-filter.test.ts b/src/domain-filter.test.ts
new file mode 100644
index 0000000..36d327f
--- /dev/null
+++ b/src/domain-filter.test.ts
@@ -0,0 +1,106 @@
+import { describe, it, expect } from 'vitest';
+import { isDomainAllowed, parseDomainList, buildWebSocketFilterScript } from './domain-filter.js';
+
+describe('domain-filter', () => {
+  describe('isDomainAllowed', () => {
+    it('should match exact domains', () => {
+      expect(isDomainAllowed('example.com', ['example.com'])).toBe(true);
+      expect(isDomainAllowed('github.com', ['github.com'])).toBe(true);
+    });
+
+    it('should reject non-matching domains', () => {
+      expect(isDomainAllowed('evil.com', ['example.com'])).toBe(false);
+      expect(isDomainAllowed('notexample.com', ['example.com'])).toBe(false);
+    });
+
+    it('should match wildcard patterns', () => {
+      expect(isDomainAllowed('sub.example.com', ['*.example.com'])).toBe(true);
+      expect(isDomainAllowed('deep.sub.example.com', ['*.example.com'])).toBe(true);
+    });
+
+    it('should match bare domain against wildcard pattern', () => {
+      expect(isDomainAllowed('example.com', ['*.example.com'])).toBe(true);
+    });
+
+    it('should reject non-matching wildcard patterns', () => {
+      expect(isDomainAllowed('example.org', ['*.example.com'])).toBe(false);
+      expect(isDomainAllowed('evil.com', ['*.example.com'])).toBe(false);
+    });
+
+    it('should return false for empty allowlist', () => {
+      expect(isDomainAllowed('example.com', [])).toBe(false);
+    });
+
+    it('should match against multiple patterns', () => {
+      const patterns = ['example.com', '*.github.com', 'vercel.app'];
+      expect(isDomainAllowed('example.com', patterns)).toBe(true);
+      expect(isDomainAllowed('api.github.com', patterns)).toBe(true);
+      expect(isDomainAllowed('vercel.app', patterns)).toBe(true);
+      expect(isDomainAllowed('evil.com', patterns)).toBe(false);
+    });
+
+    it('should not partially match domain suffixes without wildcard', () => {
+      expect(isDomainAllowed('sub.example.com', ['example.com'])).toBe(false);
+    });
+  });
+
+  describe('parseDomainList', () => {
+    it('should split comma-separated domains', () => {
+      expect(parseDomainList('a.com,b.com')).toEqual(['a.com', 'b.com']);
+    });
+
+    it('should trim whitespace', () => {
+      expect(parseDomainList(' a.com , b.com ')).toEqual(['a.com', 'b.com']);
+    });
+
+    it('should lowercase domains', () => {
+      expect(parseDomainList('Example.COM,GitHub.Com')).toEqual(['example.com', 'github.com']);
+    });
+
+    it('should filter empty entries', () => {
+      expect(parseDomainList('a.com,,b.com,')).toEqual(['a.com', 'b.com']);
+    });
+
+    it('should handle empty string', () => {
+      expect(parseDomainList('')).toEqual([]);
+    });
+
+    it('should preserve wildcard prefixes', () => {
+      expect(parseDomainList('*.example.com')).toEqual(['*.example.com']);
+    });
+  });
+
+  describe('buildWebSocketFilterScript', () => {
+    it('should produce a valid JavaScript IIFE', () => {
+      const script = buildWebSocketFilterScript(['example.com', '*.github.com']);
+      expect(script).toContain('_allowedDomains');
+      expect(script).toContain('"example.com"');
+      expect(script).toContain('"*.github.com"');
+    });
+
+    it('should embed the domain list as JSON', () => {
+      const script = buildWebSocketFilterScript(['a.com']);
+      expect(script).toContain('["a.com"]');
+    });
+
+    it('should include WebSocket, EventSource, and sendBeacon patches', () => {
+      const script = buildWebSocketFilterScript(['a.com']);
+      expect(script).toContain('WebSocket');
+      expect(script).toContain('EventSource');
+      expect(script).toContain('SecurityError');
+      expect(script).toContain('sendBeacon');
+    });
+
+    it('should handle empty allowlist', () => {
+      const script = buildWebSocketFilterScript([]);
+      expect(script).toContain('[]');
+    });
+
+    it('should include domain matching logic consistent with isDomainAllowed', () => {
+      const script = buildWebSocketFilterScript(['*.example.com']);
+      expect(script).toContain('_isDomainAllowed');
+      expect(script).toContain('slice(1)');
+      expect(script).toContain('slice(2)');
+    });
+  });
+});
diff --git a/src/domain-filter.ts b/src/domain-filter.ts
new file mode 100644
index 0000000..19dbff8
--- /dev/null
+++ b/src/domain-filter.ts
@@ -0,0 +1,156 @@
+import type { BrowserContext, Route } from 'playwright-core';
+
+/**
+ * Checks whether a hostname matches one of the allowed domain patterns.
+ * Patterns support exact match ("example.com") and wildcard prefix ("*.example.com").
+ */
+export function isDomainAllowed(hostname: string, allowedDomains: string[]): boolean {
+  for (const pattern of allowedDomains) {
+    if (pattern.startsWith('*.')) {
+      const suffix = pattern.slice(1); // ".example.com"
+      if (hostname === pattern.slice(2) || hostname.endsWith(suffix)) {
+        return true;
+      }
+    } else if (hostname === pattern) {
+      return true;
+    }
+  }
+  return false;
+}
+
+export function parseDomainList(raw: string): string[] {
+  return raw
+    .split(',')
+    .map((d) => d.trim().toLowerCase())
+    .filter((d) => d.length > 0);
+}
+
+/**
+ * Build the init script source that monkey-patches WebSocket, EventSource,
+ * and navigator.sendBeacon to block connections to non-allowed domains.
+ * Exported for testing.
+ */
+export function buildWebSocketFilterScript(allowedDomains: string[]): string {
+  const serialized = JSON.stringify(allowedDomains);
+  return `(function() {
+  var _allowedDomains = ${serialized};
+  function _isDomainAllowed(hostname) {
+    hostname = hostname.toLowerCase();
+    for (var i = 0; i < _allowedDomains.length; i++) {
+      var pattern = _allowedDomains[i];
+      if (pattern.indexOf('*.') === 0) {
+        var suffix = pattern.slice(1);
+        if (hostname === pattern.slice(2) || hostname.slice(-suffix.length) === suffix) {
+          return true;
+        }
+      } else if (hostname === pattern) {
+        return true;
+      }
+    }
+    return false;
+  }
+  function _checkUrl(url) {
+    try {
+      var parsed = new URL(url);
+      return _isDomainAllowed(parsed.hostname);
+    } catch(e) {
+      return false;
+    }
+  }
+  if (typeof WebSocket !== 'undefined') {
+    var _OrigWS = WebSocket;
+    WebSocket = function(url, protocols) {
+      if (!_checkUrl(url)) {
+        throw new DOMException(
+          'WebSocket connection to ' + url + ' blocked by domain allowlist',
+          'SecurityError'
+        );
+      }
+      if (protocols !== undefined) {
+        return new _OrigWS(url, protocols);
+      }
+      return new _OrigWS(url);
+    };
+    WebSocket.prototype = _OrigWS.prototype;
+    WebSocket.CONNECTING = _OrigWS.CONNECTING;
+    WebSocket.OPEN = _OrigWS.OPEN;
+    WebSocket.CLOSING = _OrigWS.CLOSING;
+    WebSocket.CLOSED = _OrigWS.CLOSED;
+  }
+  if (typeof EventSource !== 'undefined') {
+    var _OrigES = EventSource;
+    EventSource = function(url, opts) {
+      if (!_checkUrl(url)) {
+        throw new DOMException(
+          'EventSource connection to ' + url + ' blocked by domain allowlist',
+          'SecurityError'
+        );
+      }
+      return new _OrigES(url, opts);
+    };
+    EventSource.prototype = _OrigES.prototype;
+    EventSource.CONNECTING = _OrigES.CONNECTING;
+    EventSource.OPEN = _OrigES.OPEN;
+    EventSource.CLOSED = _OrigES.CLOSED;
+  }
+  if (typeof navigator !== 'undefined' && typeof navigator.sendBeacon === 'function') {
+    var _origSendBeacon = navigator.sendBeacon.bind(navigator);
+    navigator.sendBeacon = function(url, data) {
+      if (!_checkUrl(url)) {
+        return false;
+      }
+      return _origSendBeacon(url, data);
+    };
+  }
+})();`;
+}
+
+/**
+ * Installs a context-level route that enforces the domain allowlist.
+ * Both document navigations and sub-resource requests (scripts, images, fetch, etc.)
+ * to non-allowed domains are blocked, preventing data exfiltration.
+ * Non-http(s) schemes (data:, blob:, etc.) are allowed for sub-resources
+ * but blocked for document navigations.
+ *
+ * Also installs an init script that patches WebSocket, EventSource, and
+ * navigator.sendBeacon to block connections to non-allowed domains. This is
+ * a best-effort defense: if eval is permitted by action policy, page scripts
+ * could theoretically restore the originals. Denying the eval action
+ * category closes that loophole.
+ */
+export async function installDomainFilter(
+  context: BrowserContext,
+  allowedDomains: string[]
+): Promise<void> {
+  if (allowedDomains.length === 0) return;
+
+  await context.addInitScript(buildWebSocketFilterScript(allowedDomains));
+
+  await context.route('**/*', async (route: Route) => {
+    const request = route.request();
+    const urlStr = request.url();
+
+    if (!urlStr.startsWith('http://') && !urlStr.startsWith('https://')) {
+      if (request.resourceType() === 'document') {
+        await route.abort('blockedbyclient');
+      } else {
+        await route.continue();
+      }
+      return;
+    }
+
+    let hostname: string;
+    try {
+      hostname = new URL(urlStr).hostname.toLowerCase();
+    } catch {
+      await route.abort('blockedbyclient');
+      return;
+    }
+
+    if (isDomainAllowed(hostname, allowedDomains)) {
+      await route.continue();
+    } else {
+      await route.abort('blockedbyclient');
+    }
+  });
+}
diff --git a/src/encryption.ts b/src/encryption.ts
index 577ee15..3b366a0 100644
--- a/src/encryption.ts
+++ b/src/encryption.ts
@@ -3,6 +3,10 @@
  */
 
 import * as crypto from 'crypto';
+import { execSync } from 'node:child_process';
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import os from 'node:os';
 
 // ============================================
 // Constants
@@ -10,6 +14,7 @@ import * as crypto from 'crypto';
 export const ENCRYPTION_ALGORITHM = 'aes-256-gcm';
 export const ENCRYPTION_KEY_ENV = 'AGENT_BROWSER_ENCRYPTION_KEY';
 export const IV_LENGTH = 12; // 96 bits for GCM
+const KEY_FILE_NAME = '.encryption-key';
 
 /**
  * Encrypted payload structure.
@@ -22,27 +27,114 @@ export interface EncryptedPayload {
   data: string; // Base64 encoded ciphertext
 }
 
+export function getKeyFilePath(): string {
+  return join(os.homedir(), '.agent-browser', KEY_FILE_NAME);
+}
+
 /**
- * Get encryption key from environment variable.
+ * Restrict file permissions to the current user only.
+ * On Unix, the caller should use `mode: 0o600` when writing. This function
+ * handles Windows where Node's mode parameter is ignored.
+ */
+export function restrictFilePermissions(filePath: string): void {
+  if (os.platform() !== 'win32') return;
+  try {
+    execSync(`icacls "${filePath}" /inheritance:r /grant:r "%USERNAME%:F"`, {
+      stdio: 'ignore',
+      windowsHide: true,
+    });
+  } catch {
+    // Best-effort; may fail in some environments (containers, restricted shells)
+  }
+}
+
+/**
+ * Restrict directory permissions to the current user only.
+ * On Unix, the caller should use `mode: 0o700` when creating. This function
+ * handles Windows where Node's mode parameter is ignored.
+ */
+export function restrictDirPermissions(dirPath: string): void {
+  if (os.platform() !== 'win32') return;
+  try {
+    execSync(`icacls "${dirPath}" /inheritance:r /grant:r "%USERNAME%:(OI)(CI)F"`, {
+      stdio: 'ignore',
+      windowsHide: true,
+    });
+  } catch {
+    // Best-effort
+  }
+}
+
+function parseKeyHex(keyHex: string): Buffer | null {
+  if (!/^[a-fA-F0-9]{64}$/.test(keyHex.trim())) return null;
+  return Buffer.from(keyHex.trim(), 'hex');
+}
+
+/**
+ * Get encryption key from environment variable or key file.
  * The key should be a 32-byte (256-bit) hex-encoded string (64 characters).
  * Generate with: openssl rand -hex 32
  *
- * @returns Buffer containing the key, or null if not set/invalid
+ * Checks (in order):
+ * 1. AGENT_BROWSER_ENCRYPTION_KEY env var
+ * 2. ~/.agent-browser/.encryption-key file
+ *
+ * @returns Buffer containing the key, or null if not available
  */
 export function getEncryptionKey(): Buffer | null {
   const keyHex = process.env[ENCRYPTION_KEY_ENV];
-  if (!keyHex) return null;
-
-  // Key should be 64 hex chars = 32 bytes = 256 bits
-  if (!/^[a-fA-F0-9]{64}$/.test(keyHex)) {
-    console.warn(
-      `Warning: ${ENCRYPTION_KEY_ENV} should be a 64-character hex string (256 bits). ` +
-        `Generate one with: openssl rand -hex 32`
-    );
-    return null;
+  if (keyHex) {
+    const key = parseKeyHex(keyHex);
+    if (!key) {
+      console.warn(
+        `Warning: ${ENCRYPTION_KEY_ENV} should be a 64-character hex string (256 bits). ` +
+          `Generate one with: openssl rand -hex 32`
+      );
+      return null;
+    }
+    return key;
   }
 
-  return Buffer.from(keyHex, 'hex');
+  const keyFilePath = getKeyFilePath();
+  if (existsSync(keyFilePath)) {
+    try {
+      const fileHex = readFileSync(keyFilePath, 'utf-8');
+      return parseKeyHex(fileHex);
+    } catch {
+      return null;
+    }
+  }
+
+  return null;
+}
+
+/**
+ * Ensure an encryption key is available, auto-generating one if needed.
+ * On first call without an existing key, generates a random 256-bit key
+ * and writes it to ~/.agent-browser/.encryption-key (mode 0600).
+ */
+export function ensureEncryptionKey(): Buffer {
+  const existing = getEncryptionKey();
+  if (existing) return existing;
+
+  const key = crypto.randomBytes(32);
+  const keyHex = key.toString('hex');
+
+  const dir = join(os.homedir(), '.agent-browser');
+  if (!existsSync(dir)) {
+    mkdirSync(dir, { recursive: true, mode: 0o700 });
+    restrictDirPermissions(dir);
+  }
+
+  const keyFilePath = getKeyFilePath();
+  writeFileSync(keyFilePath, keyHex + '\n', { mode: 0o600 });
+  restrictFilePermissions(keyFilePath);
+
+  console.error(
+    `[agent-browser] Auto-generated encryption key at ${keyFilePath} -- back up this file or set ${ENCRYPTION_KEY_ENV}`
+  );
+
+  return key;
 }
 
 /**
diff --git a/src/protocol.ts b/src/protocol.ts
index 3aa2f35..0eb9cf0 100644
--- a/src/protocol.ts
+++ b/src/protocol.ts
@@ -52,6 +52,9 @@ const launchSchema = baseCommandSchema.extend({
   colorScheme: z.enum(['light', 'dark', 'no-preference']).optional(),
   downloadPath: z.string().optional(),
   storageState: z.string().optional(),
+  allowedDomains: z.array(z.string()).optional(),
+  actionPolicy: z.string().optional(),
+  confirmActions: z.array(z.string()).optional(),
 });
 
 const navigateSchema = baseCommandSchema.extend({
@@ -874,6 +877,53 @@ const windowNewSchema = baseCommandSchema.extend({
     .optional(),
 });
 
+const authProfileName = z
+  .string()
+  .min(1)
+  .regex(/^[a-zA-Z0-9_-]+$/, {
+    message: 'Profile name must contain only alphanumeric characters, hyphens, and underscores',
+  });
+
+const authSaveSchema = baseCommandSchema.extend({
+  action: z.literal('auth_save'),
+  name: authProfileName,
+  url: z.string().min(1),
+  username: z.string().min(1),
+  password: z.string().min(1),
+  usernameSelector: z.string().optional(),
+  passwordSelector: z.string().optional(),
+  submitSelector: z.string().optional(),
+});
+
+const authLoginSchema = baseCommandSchema.extend({
+  action: z.literal('auth_login'),
+  name: authProfileName,
+});
+
+const authListSchema = baseCommandSchema.extend({
+  action: z.literal('auth_list'),
+});
+
+const authDeleteSchema = baseCommandSchema.extend({
+  action: z.literal('auth_delete'),
+  name: authProfileName,
+});
+
+const authShowSchema = baseCommandSchema.extend({
+  action: z.literal('auth_show'),
+  name: authProfileName,
+});
+
+const confirmSchema = baseCommandSchema.extend({
+  action: z.literal('confirm'),
+  confirmationId: z.string().min(1),
+});
+
+const denySchema = baseCommandSchema.extend({
+  action: z.literal('deny'),
+  confirmationId: z.string().min(1),
+});
+
 // Union schema for all commands
 const commandSchema = z.discriminatedUnion('action', [
   launchSchema,
@@ -1011,6 +1061,13 @@ const commandSchema = z.discriminatedUnion('action', [
   diffSnapshotSchema,
   diffScreenshotSchema,
   diffUrlSchema,
+  confirmSchema,
+  denySchema,
+  authSaveSchema,
+  authLoginSchema,
+  authListSchema,
+  authDeleteSchema,
+  authShowSchema,
 ]);
 
 // Parse result type
diff --git a/src/types.ts b/src/types.ts
index 620ffb4..19d27b2 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -41,6 +41,9 @@ export interface LaunchCommand extends BaseCommand {
   allowFileAccess?: boolean; // Enable file:// URL access and cross-origin file requests
   colorScheme?: 'light' | 'dark' | 'no-preference'; // Persistent color scheme override
   downloadPath?: string; // Directory for browser downloads (Playwright's downloadsPath)
+  allowedDomains?: string[];
+  actionPolicy?: string;
+  confirmActions?: string[];
   // Auto-load state file for session persistence
   autoStateFilePath?: string;
 }
@@ -1033,7 +1036,54 @@ export type Command =
   | DeviceListCommand
   | DiffSnapshotCommand
   | DiffScreenshotCommand
-  | DiffUrlCommand;
+  | DiffUrlCommand
+  | AuthSaveCommand
+  | AuthLoginCommand
+  | AuthListCommand
+  | AuthDeleteCommand
+  | AuthShowCommand
+  | ConfirmCommand
+  | DenyCommand;
+
+export interface AuthSaveCommand extends BaseCommand {
+  action: 'auth_save';
+  name: string;
+  url: string;
+  username: string;
+  password: string;
+  usernameSelector?: string;
+  passwordSelector?: string;
+  submitSelector?: string;
+}
+
+export interface AuthLoginCommand extends BaseCommand {
+  action: 'auth_login';
+  name: string;
+}
+
+export interface AuthListCommand extends BaseCommand {
+  action: 'auth_list';
+}
+
+export interface AuthDeleteCommand extends BaseCommand {
+  action: 'auth_delete';
+  name: string;
+}
+
+export interface AuthShowCommand extends BaseCommand {
+  action: 'auth_show';
+  name: string;
+}
+
+export interface ConfirmCommand extends BaseCommand {
+  action: 'confirm';
+  confirmationId: string;
+}
+
+export interface DenyCommand extends BaseCommand {
+  action: 'deny';
+  confirmationId: string;
+}
 
 // Diff commands
 export interface DiffSnapshotCommand extends BaseCommand {
@@ -1105,14 +1155,39 @@ export interface ScreenshotData {
 
 export interface SnapshotData {
   snapshot: string;
+  refs?: Record<string, { role: string; name?: string }>;
+  origin?: string;
 }
 
 export interface EvaluateData {
   result: unknown;
+  origin?: string;
 }
 
 export interface ContentData {
   html: string;
+  origin?: string;
+}
+
+export interface TextData {
+  text: string | null;
+  origin?: string;
+}
+
+export interface AttributeData {
+  attribute: string;
+  value: string | null;
+  origin?: string;
+}
+
+export interface ValueData {
+  value: string;
+  origin?: string;
+}
+
+export interface ConsoleData {
+  messages: Array<{ type: string; text: string }>;
+  origin?: string;
 }
 
 export interface TabInfo {