diff --git a/pi/files/agent/extensions/custom-provider-anthropic/.gitignore b/pi/files/agent/extensions/custom-provider-anthropic/.gitignore
deleted file mode 100644
index c2658d7..0000000
--- a/pi/files/agent/extensions/custom-provider-anthropic/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-node_modules/
diff --git a/pi/files/agent/extensions/custom-provider-anthropic/index.ts b/pi/files/agent/extensions/custom-provider-anthropic/index.ts
deleted file mode 100644
index c122732..0000000
--- a/pi/files/agent/extensions/custom-provider-anthropic/index.ts
+++ /dev/null
@@ -1,604 +0,0 @@
-/**
- * Custom Provider Example
- *
- * Demonstrates registering a custom provider with:
- * - Custom API identifier ("custom-anthropic-api")
- * - Custom streamSimple implementation
- * - OAuth support for /login
- * - API key support via environment variable
- * - Two model definitions
- *
- * Usage:
- *   # First install dependencies
- *   cd packages/coding-agent/examples/extensions/custom-provider && npm install
- *
- *   # With OAuth (run /login custom-anthropic first)
- *   pi -e ./packages/coding-agent/examples/extensions/custom-provider
- *
- *   # With API key
- *   CUSTOM_ANTHROPIC_API_KEY=sk-ant-... pi -e ./packages/coding-agent/examples/extensions/custom-provider
- *
- * Then use /model to select custom-anthropic/claude-sonnet-4-5
- */
-
-import Anthropic from "@anthropic-ai/sdk";
-import type { ContentBlockParam, MessageCreateParamsStreaming } from "@anthropic-ai/sdk/resources/messages.js";
-import {
-	type Api,
-	type AssistantMessage,
-	type AssistantMessageEventStream,
-	type Context,
-	calculateCost,
-	createAssistantMessageEventStream,
-	type ImageContent,
-	type Message,
-	type Model,
-	type OAuthCredentials,
-	type OAuthLoginCallbacks,
-	type SimpleStreamOptions,
-	type StopReason,
-	type TextContent,
-	type ThinkingContent,
-	type Tool,
-	type ToolCall,
-	type ToolResultMessage,
-} from "@mariozechner/pi-ai";
-import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
-
-// =============================================================================
-// OAuth Implementation (copied from packages/ai/src/utils/oauth/anthropic.ts)
-// =============================================================================
-
-const decode = (s: string) => atob(s);
-const CLIENT_ID = decode("OWQxYzI1MGEtZTYxYi00NGQ5LTg4ZWQtNTk0NGQxOTYyZjVl");
-const AUTHORIZE_URL = "https://claude.ai/oauth/authorize";
-const TOKEN_URL = "https://console.anthropic.com/v1/oauth/token";
-const REDIRECT_URI = "https://console.anthropic.com/oauth/code/callback";
-const SCOPES = "org:create_api_key user:profile user:inference";
-
-async function generatePKCE(): Promise<{ verifier: string; challenge: string }> {
-	const array = new Uint8Array(32);
-	crypto.getRandomValues(array);
-	const verifier = btoa(String.fromCharCode(...array))
-		.replace(/\+/g, "-")
-		.replace(/\//g, "_")
-		.replace(/=+$/, "");
-
-	const encoder = new TextEncoder();
-	const data = encoder.encode(verifier);
-	const hash = await crypto.subtle.digest("SHA-256", data);
-	const challenge = btoa(String.fromCharCode(...new Uint8Array(hash)))
-		.replace(/\+/g, "-")
-		.replace(/\//g, "_")
-		.replace(/=+$/, "");
-
-	return { verifier, challenge };
-}
-
-async function loginAnthropic(callbacks: OAuthLoginCallbacks): Promise<OAuthCredentials> {
-	const { verifier, challenge } = await generatePKCE();
-
-	const authParams = new URLSearchParams({
-		code: "true",
-		client_id: CLIENT_ID,
-		response_type: "code",
-		redirect_uri: REDIRECT_URI,
-		scope: SCOPES,
-		code_challenge: challenge,
-		code_challenge_method: "S256",
-		state: verifier,
-	});
-
-	callbacks.onAuth({ url: `${AUTHORIZE_URL}?${authParams.toString()}` });
-
-	const authCode = await callbacks.onPrompt({ message: "Paste the authorization code:" });
-	const [code, state] = authCode.split("#");
-
-	const tokenResponse = await fetch(TOKEN_URL, {
-		method: "POST",
-		headers: { "Content-Type": "application/json" },
-		body: JSON.stringify({
-			grant_type: "authorization_code",
-			client_id: CLIENT_ID,
-			code,
-			state,
-			redirect_uri: REDIRECT_URI,
-			code_verifier: verifier,
-		}),
-	});
-
-	if (!tokenResponse.ok) {
-		throw new Error(`Token exchange failed: ${await tokenResponse.text()}`);
-	}
-
-	const data = (await tokenResponse.json()) as {
-		access_token: string;
-		refresh_token: string;
-		expires_in: number;
-	};
-
-	return {
-		refresh: data.refresh_token,
-		access: data.access_token,
-		expires: Date.now() + data.expires_in * 1000 - 5 * 60 * 1000,
-	};
-}
-
-async function refreshAnthropicToken(credentials: OAuthCredentials): Promise<OAuthCredentials> {
-	const response = await fetch(TOKEN_URL, {
-		method: "POST",
-		headers: { "Content-Type": "application/json" },
-		body: JSON.stringify({
-			grant_type: "refresh_token",
-			client_id: CLIENT_ID,
-			refresh_token: credentials.refresh,
-		}),
-	});
-
-	if (!response.ok) {
-		throw new Error(`Token refresh failed: ${await response.text()}`);
-	}
-
-	const data = (await response.json()) as {
-		access_token: string;
-		refresh_token: string;
-		expires_in: number;
-	};
-
-	return {
-		refresh: data.refresh_token,
-		access: data.access_token,
-		expires: Date.now() + data.expires_in * 1000 - 5 * 60 * 1000,
-	};
-}
-
-// =============================================================================
-// Streaming Implementation (simplified from packages/ai/src/providers/anthropic.ts)
-// =============================================================================
-
-// Claude Code tool names for OAuth stealth mode
-const claudeCodeTools = [
-	"Read",
-	"Write",
-	"Edit",
-	"Bash",
-	"Grep",
-	"Glob",
-	"AskUserQuestion",
-	"TodoWrite",
-	"WebFetch",
-	"WebSearch",
-];
-const ccToolLookup = new Map(claudeCodeTools.map((t) => [t.toLowerCase(), t]));
-const toClaudeCodeName = (name: string) => ccToolLookup.get(name.toLowerCase()) ?? name;
-const fromClaudeCodeName = (name: string, tools?: Tool[]) => {
-	const lowerName = name.toLowerCase();
-	const matched = tools?.find((t) => t.name.toLowerCase() === lowerName);
-	return matched?.name ?? name;
-};
-
-function isOAuthToken(apiKey: string): boolean {
-	return apiKey.includes("sk-ant-oat");
-}
-
-function sanitizeSurrogates(text: string): string {
-	return text.replace(/[\uD800-\uDFFF]/g, "\uFFFD");
-}
-
-function convertContentBlocks(
-	content: (TextContent | ImageContent)[],
-): string | Array<{ type: "text"; text: string } | { type: "image"; source: any }> {
-	const hasImages = content.some((c) => c.type === "image");
-	if (!hasImages) {
-		return sanitizeSurrogates(content.map((c) => (c as TextContent).text).join("\n"));
-	}
-
-	const blocks = content.map((block) => {
-		if (block.type === "text") {
-			return { type: "text" as const, text: sanitizeSurrogates(block.text) };
-		}
-		return {
-			type: "image" as const,
-			source: {
-				type: "base64" as const,
-				media_type: block.mimeType,
-				data: block.data,
-			},
-		};
-	});
-
-	if (!blocks.some((b) => b.type === "text")) {
-		blocks.unshift({ type: "text" as const, text: "(see attached image)" });
-	}
-
-	return blocks;
-}
-
-function convertMessages(messages: Message[], isOAuth: boolean, _tools?: Tool[]): any[] {
-	const params: any[] = [];
-
-	for (let i = 0; i < messages.length; i++) {
-		const msg = messages[i];
-
-		if (msg.role === "user") {
-			if (typeof msg.content === "string") {
-				if (msg.content.trim()) {
-					params.push({ role: "user", content: sanitizeSurrogates(msg.content) });
-				}
-			} else {
-				const blocks: ContentBlockParam[] = msg.content.map((item) =>
-					item.type === "text"
-						? { type: "text" as const, text: sanitizeSurrogates(item.text) }
-						: {
-								type: "image" as const,
-								source: { type: "base64" as const, media_type: item.mimeType as any, data: item.data },
-							},
-				);
-				if (blocks.length > 0) {
-					params.push({ role: "user", content: blocks });
-				}
-			}
-		} else if (msg.role === "assistant") {
-			const blocks: ContentBlockParam[] = [];
-			for (const block of msg.content) {
-				if (block.type === "text" && block.text.trim()) {
-					blocks.push({ type: "text", text: sanitizeSurrogates(block.text) });
-				} else if (block.type === "thinking" && block.thinking.trim()) {
-					if ((block as ThinkingContent).thinkingSignature) {
-						blocks.push({
-							type: "thinking" as any,
-							thinking: sanitizeSurrogates(block.thinking),
-							signature: (block as ThinkingContent).thinkingSignature!,
-						});
-					} else {
-						blocks.push({ type: "text", text: sanitizeSurrogates(block.thinking) });
-					}
-				} else if (block.type === "toolCall") {
-					blocks.push({
-						type: "tool_use",
-						id: block.id,
-						name: isOAuth ? toClaudeCodeName(block.name) : block.name,
-						input: block.arguments,
-					});
-				}
-			}
-			if (blocks.length > 0) {
-				params.push({ role: "assistant", content: blocks });
-			}
-		} else if (msg.role === "toolResult") {
-			const toolResults: any[] = [];
-			toolResults.push({
-				type: "tool_result",
-				tool_use_id: msg.toolCallId,
-				content: convertContentBlocks(msg.content),
-				is_error: msg.isError,
-			});
-
-			let j = i + 1;
-			while (j < messages.length && messages[j].role === "toolResult") {
-				const nextMsg = messages[j] as ToolResultMessage;
-				toolResults.push({
-					type: "tool_result",
-					tool_use_id: nextMsg.toolCallId,
-					content: convertContentBlocks(nextMsg.content),
-					is_error: nextMsg.isError,
-				});
-				j++;
-			}
-			i = j - 1;
-			params.push({ role: "user", content: toolResults });
-		}
-	}
-
-	// Add cache control to last user message
-	if (params.length > 0) {
-		const last = params[params.length - 1];
-		if (last.role === "user" && Array.isArray(last.content)) {
-			const lastBlock = last.content[last.content.length - 1];
-			if (lastBlock) {
-				lastBlock.cache_control = { type: "ephemeral" };
-			}
-		}
-	}
-
-	return params;
-}
-
-function convertTools(tools: Tool[], isOAuth: boolean): any[] {
-	return tools.map((tool) => ({
-		name: isOAuth ? toClaudeCodeName(tool.name) : tool.name,
-		description: tool.description,
-		input_schema: {
-			type: "object",
-			properties: (tool.parameters as any).properties || {},
-			required: (tool.parameters as any).required || [],
-		},
-	}));
-}
-
-function mapStopReason(reason: string): StopReason {
-	switch (reason) {
-		case "end_turn":
-		case "pause_turn":
-		case "stop_sequence":
-			return "stop";
-		case "max_tokens":
-			return "length";
-		case "tool_use":
-			return "toolUse";
-		default:
-			return "error";
-	}
-}
-
-function streamCustomAnthropic(
-	model: Model<Api>,
-	context: Context,
-	options?: SimpleStreamOptions,
-): AssistantMessageEventStream {
-	const stream = createAssistantMessageEventStream();
-
-	(async () => {
-		const output: AssistantMessage = {
-			role: "assistant",
-			content: [],
-			api: model.api,
-			provider: model.provider,
-			model: model.id,
-			usage: {
-				input: 0,
-				output: 0,
-				cacheRead: 0,
-				cacheWrite: 0,
-				totalTokens: 0,
-				cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
-			},
-			stopReason: "stop",
-			timestamp: Date.now(),
-		};
-
-		try {
-			const apiKey = options?.apiKey ?? "";
-			const isOAuth = isOAuthToken(apiKey);
-
-			// Configure client based on auth type
-			const betaFeatures = ["fine-grained-tool-streaming-2025-05-14", "interleaved-thinking-2025-05-14"];
-			const clientOptions: any = {
-				baseURL: model.baseUrl,
-				dangerouslyAllowBrowser: true,
-			};
-
-			if (isOAuth) {
-				clientOptions.apiKey = null;
-				clientOptions.authToken = apiKey;
-				clientOptions.defaultHeaders = {
-					accept: "application/json",
-					"anthropic-dangerous-direct-browser-access": "true",
-					"anthropic-beta": `claude-code-20250219,oauth-2025-04-20,${betaFeatures.join(",")}`,
-					"user-agent": "claude-cli/2.1.2 (external, cli)",
-					"x-app": "cli",
-				};
-			} else {
-				clientOptions.apiKey = apiKey;
-				clientOptions.defaultHeaders = {
-					accept: "application/json",
-					"anthropic-dangerous-direct-browser-access": "true",
-					"anthropic-beta": betaFeatures.join(","),
-				};
-			}
-
-			const client = new Anthropic(clientOptions);
-
-			// Build request params
-			const params: MessageCreateParamsStreaming = {
-				model: model.id,
-				messages: convertMessages(context.messages, isOAuth, context.tools),
-				max_tokens: options?.maxTokens || Math.floor(model.maxTokens / 3),
-				stream: true,
-			};
-
-			// System prompt with Claude Code identity for OAuth
-			if (isOAuth) {
-				params.system = [
-					{
-						type: "text",
-						text: "You are Claude Code, Anthropic's official CLI for Claude.",
-						cache_control: { type: "ephemeral" },
-					},
-				];
-				if (context.systemPrompt) {
-					params.system.push({
-						type: "text",
-						text: sanitizeSurrogates(context.systemPrompt),
-						cache_control: { type: "ephemeral" },
-					});
-				}
-			} else if (context.systemPrompt) {
-				params.system = [
-					{
-						type: "text",
-						text: sanitizeSurrogates(context.systemPrompt),
-						cache_control: { type: "ephemeral" },
-					},
-				];
-			}
-
-			if (context.tools) {
-				params.tools = convertTools(context.tools, isOAuth);
-			}
-
-			// Handle thinking/reasoning
-			if (options?.reasoning && model.reasoning) {
-				const defaultBudgets: Record<string, number> = {
-					minimal: 1024,
-					low: 4096,
-					medium: 10240,
-					high: 20480,
-				};
-				const customBudget = options.thinkingBudgets?.[options.reasoning as keyof typeof options.thinkingBudgets];
-				params.thinking = {
-					type: "enabled",
-					budget_tokens: customBudget ?? defaultBudgets[options.reasoning] ?? 10240,
-				};
-			}
-
-			const anthropicStream = client.messages.stream({ ...params }, { signal: options?.signal });
-			stream.push({ type: "start", partial: output });
-
-			type Block = (ThinkingContent | TextContent | (ToolCall & { partialJson: string })) & { index: number };
-			const blocks = output.content as Block[];
-
-			for await (const event of anthropicStream) {
-				if (event.type === "message_start") {
-					output.usage.input = event.message.usage.input_tokens || 0;
-					output.usage.output = event.message.usage.output_tokens || 0;
-					output.usage.cacheRead = (event.message.usage as any).cache_read_input_tokens || 0;
-					output.usage.cacheWrite = (event.message.usage as any).cache_creation_input_tokens || 0;
-					output.usage.totalTokens =
-						output.usage.input + output.usage.output + output.usage.cacheRead + output.usage.cacheWrite;
-					calculateCost(model, output.usage);
-				} else if (event.type === "content_block_start") {
-					if (event.content_block.type === "text") {
-						output.content.push({ type: "text", text: "", index: event.index } as any);
-						stream.push({ type: "text_start", contentIndex: output.content.length - 1, partial: output });
-					} else if (event.content_block.type === "thinking") {
-						output.content.push({
-							type: "thinking",
-							thinking: "",
-							thinkingSignature: "",
-							index: event.index,
-						} as any);
-						stream.push({ type: "thinking_start", contentIndex: output.content.length - 1, partial: output });
-					} else if (event.content_block.type === "tool_use") {
-						output.content.push({
-							type: "toolCall",
-							id: event.content_block.id,
-							name: isOAuth
-								? fromClaudeCodeName(event.content_block.name, context.tools)
-								: event.content_block.name,
-							arguments: {},
-							partialJson: "",
-							index: event.index,
-						} as any);
-						stream.push({ type: "toolcall_start", contentIndex: output.content.length - 1, partial: output });
-					}
-				} else if (event.type === "content_block_delta") {
-					const index = blocks.findIndex((b) => b.index === event.index);
-					const block = blocks[index];
-					if (!block) continue;
-
-					if (event.delta.type === "text_delta" && block.type === "text") {
-						block.text += event.delta.text;
-						stream.push({ type: "text_delta", contentIndex: index, delta: event.delta.text, partial: output });
-					} else if (event.delta.type === "thinking_delta" && block.type === "thinking") {
-						block.thinking += event.delta.thinking;
-						stream.push({
-							type: "thinking_delta",
-							contentIndex: index,
-							delta: event.delta.thinking,
-							partial: output,
-						});
-					} else if (event.delta.type === "input_json_delta" && block.type === "toolCall") {
-						(block as any).partialJson += event.delta.partial_json;
-						try {
-							block.arguments = JSON.parse((block as any).partialJson);
-						} catch {}
-						stream.push({
-							type: "toolcall_delta",
-							contentIndex: index,
-							delta: event.delta.partial_json,
-							partial: output,
-						});
-					} else if (event.delta.type === "signature_delta" && block.type === "thinking") {
-						block.thinkingSignature = (block.thinkingSignature || "") + (event.delta as any).signature;
-					}
-				} else if (event.type === "content_block_stop") {
-					const index = blocks.findIndex((b) => b.index === event.index);
-					const block = blocks[index];
-					if (!block) continue;
-
-					delete (block as any).index;
-					if (block.type === "text") {
-						stream.push({ type: "text_end", contentIndex: index, content: block.text, partial: output });
-					} else if (block.type === "thinking") {
-						stream.push({ type: "thinking_end", contentIndex: index, content: block.thinking, partial: output });
-					} else if (block.type === "toolCall") {
-						try {
-							block.arguments = JSON.parse((block as any).partialJson);
-						} catch {}
-						delete (block as any).partialJson;
-						stream.push({ type: "toolcall_end", contentIndex: index, toolCall: block, partial: output });
-					}
-				} else if (event.type === "message_delta") {
-					if ((event.delta as any).stop_reason) {
-						output.stopReason = mapStopReason((event.delta as any).stop_reason);
-					}
-					output.usage.input = (event.usage as any).input_tokens || 0;
-					output.usage.output = (event.usage as any).output_tokens || 0;
-					output.usage.cacheRead = (event.usage as any).cache_read_input_tokens || 0;
-					output.usage.cacheWrite = (event.usage as any).cache_creation_input_tokens || 0;
-					output.usage.totalTokens =
-						output.usage.input + output.usage.output + output.usage.cacheRead + output.usage.cacheWrite;
-					calculateCost(model, output.usage);
-				}
-			}
-
-			if (options?.signal?.aborted) {
-				throw new Error("Request was aborted");
-			}
-
-			stream.push({ type: "done", reason: output.stopReason as "stop" | "length" | "toolUse", message: output });
-			stream.end();
-		} catch (error) {
-			for (const block of output.content) delete (block as any).index;
-			output.stopReason = options?.signal?.aborted ? "aborted" : "error";
-			output.errorMessage = error instanceof Error ? error.message : JSON.stringify(error);
-			stream.push({ type: "error", reason: output.stopReason, error: output });
-			stream.end();
-		}
-	})();
-
-	return stream;
-}
-
-// =============================================================================
-// Extension Entry Point
-// =============================================================================
-
-export default function (pi: ExtensionAPI) {
-	pi.registerProvider("custom-anthropic", {
-		baseUrl: "https://api.anthropic.com",
-		apiKey: "CUSTOM_ANTHROPIC_API_KEY",
-		api: "custom-anthropic-api",
-
-		models: [
-			{
-				id: "claude-opus-4-5",
-				name: "Claude Opus 4.5 (Custom)",
-				reasoning: true,
-				input: ["text", "image"],
-				cost: { input: 5, output: 25, cacheRead: 0.5, cacheWrite: 6.25 },
-				contextWindow: 200000,
-				maxTokens: 64000,
-			},
-			{
-				id: "claude-sonnet-4-5",
-				name: "Claude Sonnet 4.5 (Custom)",
-				reasoning: true,
-				input: ["text", "image"],
-				cost: { input: 3, output: 15, cacheRead: 0.3, cacheWrite: 3.75 },
-				contextWindow: 200000,
-				maxTokens: 64000,
-			},
-		],
-
-		oauth: {
-			name: "Custom Anthropic (Claude Pro/Max)",
-			login: loginAnthropic,
-			refreshToken: refreshAnthropicToken,
-			getApiKey: (cred) => cred.access,
-		},
-
-		streamSimple: streamCustomAnthropic,
-	});
-}
diff --git a/pi/files/agent/keybindings.json b/pi/files/agent/keybindings.json
index d22eb76..7283e43 100644
--- a/pi/files/agent/keybindings.json
+++ b/pi/files/agent/keybindings.json
@@ -1,3 +1,5 @@
 {
-  "app.model.select": "ctrl+space"
+  "app.model.select": "ctrl+space",
+  "tui.input.newLine": ["shift+enter"],
+  "tui.input.submit": ["enter"]
 }
diff --git a/scripts/files/zellij-replace-tab-layout.sh b/scripts/files/zellij-replace-tab-layout.sh
new file mode 100755
index 0000000..c26671a
--- /dev/null
+++ b/scripts/files/zellij-replace-tab-layout.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Replace the current zellij tab by opening a layout in a new tab
+# and closing the original tab.
+#
+# Usage:
+#   zellij-replace-tab-layout.sh            # uses "dev"
+#   zellij-replace-tab-layout.sh dev
+#   zellij-replace-tab-layout.sh my-layout
+
+layout="${1:-dev}"
+
+case "${layout}" in
+  -h|--help)
+    cat <<'EOF'
+zellij-replace-tab-layout.sh
+
+Replace the current zellij tab with a new tab created from a layout.
+This avoids `zellij action override-layout` glitches.
+
+Usage:
+  zellij-replace-tab-layout.sh [layout]
+
+Examples:
+  zellij-replace-tab-layout.sh
+  zellij-replace-tab-layout.sh dev
+  zellij-replace-tab-layout.sh dotfiles
+EOF
+    exit 0
+    ;;
+esac
+
+if ! command -v zellij >/dev/null 2>&1; then
+  echo "zellij not found in PATH" >&2
+  exit 1
+fi
+
+if [ -z "${ZELLIJ:-}" ]; then
+  echo "Not inside a zellij session (ZELLIJ is not set)" >&2
+  exit 1
+fi
+
+current_tab_id="$(zellij action current-tab-info | awk '/^id:/ { print $2 }')"
+
+if [ -z "$current_tab_id" ]; then
+  echo "Failed to detect current tab id" >&2
+  exit 1
+fi
+
+zellij action new-tab --layout "$layout" >/dev/null
+zellij action close-tab --tab-id "$current_tab_id"