docs: rename AI Bridge to AI Gateway and Agent Boundaries to Agent Firewall (#24094)

*Disclaimer: implemented by a Coder Agent using Claude Opus 4.6*

## Summary

Renames product references across documentation:

| Old Name | New Name |
|----------|----------|
| AI Bridge | AI Gateway |
| AI Bridge Proxy | AI Gateway Proxy |
| Agent Boundaries | Agent Firewall |

## What changed

- Prose text, headings, titles, and descriptions updated across all docs
- Directories renamed:
  - `docs/ai-coder/ai-bridge/` → `docs/ai-coder/ai-gateway/`
- `docs/ai-coder/ai-bridge/ai-bridge-proxy/` →
`docs/ai-coder/ai-gateway/ai-gateway-proxy/`
  - `docs/ai-coder/agent-boundaries/` → `docs/ai-coder/agent-firewall/`
- All internal markdown links updated to new paths
- `manifest.json` route paths updated
- Rename notice added to AI Gateway and Agent Firewall entrypoint pages

## Companion PR

URL redirects (old paths → new paths):
[coder/coder.com#700](https://github.com/coder/coder.com/pull/700)

## What is intentionally NOT changed

- **Env vars**: `CODER_AIBRIDGE_*`
- **CLI flags**: `--aibridge-*`
- **API paths**: `/api/v2/aibridge/*`
- **Config keys**: `aibridge:` YAML blocks
- **Terraform variables**: `enable_aibridge`, `boundary_version`,
`use_boundary_directly`
- **Process names**: `aibridged`, `aibridgeproxyd`
- **Prometheus metrics**: `coder_aibridged_*`, `coder_aibridgeproxyd_*`
- **SDK types**: `codersdk.AIBridge*`
- **GitHub URLs**: `github.com/coder/aibridge`
- **Image paths**: `images/aibridge/`
- **Auto-generated reference docs**: `docs/reference/cli/aibridge*.md`,
`docs/reference/api/aibridge.md`, `docs/reference/api/schemas.md`
- **Frontend code**: `site/src/` references (separate PR)

Code-level renames (env vars, configs, frontend) are planned for a
follow-up PR.

docs/install/releases/esr-2.24-2.29-upgrade.md

@@ -28,9 +28,9 @@ Coder—particularly suited for long-running background operations like bug fixe
 documentation generation, PR reviews, and testing/QA.For more information, read
 our documentation [here](https://coder.com/docs/ai-coder/tasks).
 
-### AI Bridge
+### AI Gateway
 
-AI Bridge was introduced in 2.26, and is a smart gateway that acts as an
+AI Gateway was introduced in 2.26, and is a smart gateway that acts as an
 intermediary between users' coding agents/IDEs and AI providers like OpenAI and
 Anthropic. It solves three key problems:
 
@@ -42,19 +42,19 @@ Anthropic. It solves three key problems:
 
 This is a Premium/Beta feature that intercepts AI traffic to record prompts,
 token usage, and tool invocations. For more information, read our documentation
-[here](https://coder.com/docs/ai-coder/ai-bridge).
+[here](../../ai-coder/ai-gateway/index.md).
 
-### Agent Boundaries
+### Agent Firewall
 
-Agent Boundaries was introduced in 2.27 and is currently in Early Access. Agent
-Boundaries are process-level firewalls in Coder that restrict and audit what
+Agent Firewall was introduced in 2.27 and is currently in Early Access. Agent
+Firewall is a process-level firewall in Coder that restricts and audits what
 autonomous programs (like AI agents) can access and do within a workspace. They
 provide network policy enforcement—blocking specific domains and HTTP verbs to
 prevent data exfiltration—and write logs to the workspace for auditability.
-Boundaries support any terminal-based agent, including custom ones, and can be
+Agent Firewall supports any terminal-based agent, including custom ones, and can be
 easily configured through existing Coder modules like the Claude Code module.
 For more information, read our documentation
-[here](../../ai-coder/agent-boundaries/index.md).
+[here](../../ai-coder/agent-firewall/index.md).
 
 ### Performance Enhancements
 

docs/install/releases/feature-stages.md

@@ -106,7 +106,7 @@ available in the documentation.
 |------------------------------------------------------------------------------|------------------------------------------------|------------------|
 | [MCP Server](../../ai-coder/mcp-server.md)                                   | Connect to agents Coder with a MCP server      | mainline, stable |
 | [JetBrains Toolbox](../../user-guides/workspace-access/jetbrains/toolbox.md) | Access Coder workspaces from JetBrains Toolbox | mainline, stable |
-| Agent Boundaries                                                             | Understanding Agent Boundaries in Coder Tasks  | stable           |
+| Agent Firewall                                                               | Understanding Agent Firewall in Coder Tasks    | stable           |
 | [Workspace Sharing](../../user-guides/shared-workspaces.md)                  | Sharing workspaces                             | mainline, stable |
 <!-- END: available-beta-features -->