feat: rebrand remaining T3 Code references to Haven Code

Replace all user-facing T3/t3code references with Haven Code/havenCode:
- CLI command: t3 → haven-code, npm package: t3 → haven-code
- Branch prefixes: t3code/ → havenCode/ (worktrees and PR branches)
- Build artifact name: t3-code-desktop → haven-code-desktop
- GitHub release name, docs, error messages
- Effect service identifiers: t3/ → haven-code/ (required by linter)

Intentionally preserved for backward compatibility:
- T3CODE_* env vars, t3code: localStorage keys, refs/t3/ git refs
- t3:// desktop scheme, legacy data dir names, @t3tools/* packages

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dafzthomas

.docs/architecture.md

@@ -1,6 +1,6 @@
 # Architecture
 
-T3 Code runs as a **Node.js WebSocket server** that wraps `codex app-server` (JSON-RPC over stdio) and serves a React web app.
+Haven Code runs as a **Node.js WebSocket server** that wraps `codex app-server` (JSON-RPC over stdio) and serves a React web app.
 
 ```
 ┌─────────────────────────────────┐

.docs/codex-prerequisites.md

@@ -1,5 +1,5 @@
 # Codex prerequisites
 
 - Install Codex CLI so `codex` is on your PATH.
-- Authenticate Codex before running T3 Code (for example via API key or ChatGPT auth supported by Codex).
-- T3 Code starts the server via `codex app-server` per session.
+- Authenticate Codex before running Haven Code (for example via API key or ChatGPT auth supported by Codex).
+- Haven Code starts the server via `codex app-server` per session.

.docs/encyclopedia.md

@@ -1,6 +1,6 @@
 # Encyclopedia
 
-This is a living glossary for T3 Code. It explains what common terms mean in this codebase.
+This is a living glossary for Haven Code. It explains what common terms mean in this codebase.
 
 ## Table of contents
 

.docs/runtime-modes.md

@@ -1,6 +1,6 @@
 # Runtime modes
 
-T3 Code has a global runtime mode switch in the chat toolbar:
+Haven Code has a global runtime mode switch in the chat toolbar:
 
 - **Full access** (default): starts sessions with `approvalPolicy: never` and `sandboxMode: danger-full-access`.
 - **Supervised**: starts sessions with `approvalPolicy: on-request` and `sandboxMode: workspace-write`, then prompts in-app for command/file approvals.

.github/workflows/release.yml

@@ -257,7 +257,7 @@ jobs:
         with:
           tag_name: ${{ needs.preflight.outputs.tag }}
           target_commitish: ${{ needs.preflight.outputs.ref }}
-          name: T3 Code v${{ needs.preflight.outputs.version }}
+          name: Haven Code v${{ needs.preflight.outputs.version }}
           generate_release_notes: true
           prerelease: ${{ needs.preflight.outputs.is_prerelease }}
           make_latest: ${{ needs.preflight.outputs.make_latest }}

AGENTS.md

@@ -7,7 +7,7 @@
 
 ## Project Snapshot
 
-T3 Code is a minimal web GUI for using coding agents like Codex and Claude.
+Haven Code is a minimal web GUI for using coding agents like Codex and Claude.
 
 This repository is a VERY EARLY WIP. Proposing sweeping changes that improve long-term maintainability is encouraged.
 
@@ -32,7 +32,7 @@ Long term maintainability is a core priority. If you add new functionality, firs
 
 ## Codex App Server (Important)
 
-T3 Code is currently Codex-first. The server starts `codex app-server` (JSON-RPC over stdio) per provider session, then streams structured events to the browser through WebSocket push messages.
+Haven Code is currently Codex-first. The server starts `codex app-server` (JSON-RPC over stdio) per provider session, then streams structured events to the browser through WebSocket push messages.
 
 How we use it in this codebase:
 

KEYBINDINGS.md

@@ -1,6 +1,6 @@
 # Keybindings
 
-T3 Code reads keybindings from:
+Haven Code reads keybindings from:
 
 - `~/.t3/keybindings.json`
 

README.md

@@ -1,14 +1,14 @@
-# T3 Code
+# Haven Code
 
-T3 Code is a minimal web GUI for coding agents (currently Codex and Claude, more coming soon).
+Haven Code is a minimal web GUI for coding agents (currently Codex and Claude, more coming soon).
 
 ## How to use
 
 > [!WARNING]
-> You need to have [Codex CLI](https://github.com/openai/codex) installed and authorized for T3 Code to work.
+> You need to have [Codex CLI](https://github.com/openai/codex) installed and authorized for Haven Code to work.
 
 ```bash
-npx t3
+npx haven-code
 ```
 
 You can also just install the desktop app. It's cooler.

REMOTE.md

@@ -1,10 +1,10 @@
 # Remote Access Setup
 
-Use this when you want to open T3 Code from another device (phone, tablet, another laptop).
+Use this when you want to open Haven Code from another device (phone, tablet, another laptop).
 
 ## CLI ↔ Env option map
 
-The T3 Code CLI accepts the following configuration options, available either as CLI flags or environment variables:
+The Haven Code CLI accepts the following configuration options, available either as CLI flags or environment variables:
 
 | CLI flag                | Env var               | Notes                              |
 | ----------------------- | --------------------- | ---------------------------------- |

apps/server/package.json

@@ -1,13 +1,13 @@
 {
-  "name": "t3",
+  "name": "haven-code",
   "version": "0.0.10",
   "repository": {
     "type": "git",
     "url": "https://github.com/pingdotgg/t3code",
     "directory": "apps/server"
   },
   "bin": {
-    "t3": "./dist/index.mjs"
+    "haven-code": "./dist/index.mjs"
   },
   "files": [
     "dist"