diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index df63feefb..cfd11271c 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 
 ## [Unreleased]
+### Fixed
+
+- Fixed Cloud Code Assist tool schema conversion to avoid unsupported `const` fields
 
 ## [4.2.0] - 2026-01-10
 
diff --git a/packages/ai/src/providers/google-shared.ts b/packages/ai/src/providers/google-shared.ts
index 9a59f3457..b0438cf75 100644
--- a/packages/ai/src/providers/google-shared.ts
+++ b/packages/ai/src/providers/google-shared.ts
@@ -189,6 +189,38 @@ export function convertMessages<T extends GoogleApiType>(model: Model<T>, contex
 	return contents;
 }
 
+function sanitizeSchemaForGoogle(value: unknown): unknown {
+	if (Array.isArray(value)) {
+		return value.map((entry) => sanitizeSchemaForGoogle(entry));
+	}
+
+	if (!value || typeof value !== "object") {
+		return value;
+	}
+
+	const result: Record<string, unknown> = {};
+	let constValue: unknown | undefined;
+
+	for (const [key, entry] of Object.entries(value)) {
+		if (key === "const") {
+			constValue = entry;
+			continue;
+		}
+		result[key] = sanitizeSchemaForGoogle(entry);
+	}
+
+	if (constValue !== undefined) {
+		const existingEnum = Array.isArray(result.enum) ? [...result.enum] : undefined;
+		const enumValues = existingEnum ?? [];
+		if (!enumValues.some((item) => Object.is(item, constValue))) {
+			enumValues.push(constValue);
+		}
+		result.enum = enumValues;
+	}
+
+	return result;
+}
+
 /**
  * Convert tools to Gemini function declarations format.
  */
@@ -201,7 +233,7 @@ export function convertTools(
 			functionDeclarations: tools.map((tool) => ({
 				name: tool.name,
 				description: tool.description,
-				parameters: tool.parameters as Schema,
+				parameters: sanitizeSchemaForGoogle(tool.parameters) as Schema,
 			})),
 		},
 	];
diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 859a064ed..e7ba77329 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -8,6 +8,7 @@
 ### Fixed
 
 - Fixed editor border rendering glitch after canceling slash command autocomplete
+- Fixed login/logout credential path message to reference agent.db
 
 ### Removed
 
diff --git a/packages/coding-agent/src/core/agent-session.ts b/packages/coding-agent/src/core/agent-session.ts
index 5156ba5e7..042e0c5dc 100644
--- a/packages/coding-agent/src/core/agent-session.ts
+++ b/packages/coding-agent/src/core/agent-session.ts
@@ -17,7 +17,7 @@ import type { Agent, AgentEvent, AgentMessage, AgentState, AgentTool, ThinkingLe
 import type { AssistantMessage, ImageContent, Message, Model, TextContent, Usage } from "@oh-my-pi/pi-ai";
 import { isContextOverflow, modelsAreEqual, supportsXhigh } from "@oh-my-pi/pi-ai";
 import type { Rule } from "../capability/rule";
-import { getAuthPath } from "../config";
+import { getAgentDbPath } from "../config";
 import { theme } from "../modes/interactive/theme/theme";
 import { type BashResult, executeBash as executeBashCommand, executeBashWithOperations } from "./bash-executor";
 import {
@@ -761,7 +761,7 @@ export class AgentSession {
 		if (!this.model) {
 			throw new Error(
 				"No model selected.\n\n" +
-					`Use /login, set an API key environment variable, or create ${getAuthPath()}\n\n` +
+					`Use /login, set an API key environment variable, or create ${getAgentDbPath()}\n\n` +
 					"Then use /model to select a model.",
 			);
 		}
@@ -771,7 +771,7 @@ export class AgentSession {
 		if (!apiKey) {
 			throw new Error(
 				`No API key found for ${this.model.provider}.\n\n` +
-					`Use /login, set an API key environment variable, or create ${getAuthPath()}`,
+					`Use /login, set an API key environment variable, or create ${getAgentDbPath()}`,
 			);
 		}
 
diff --git a/packages/coding-agent/src/modes/interactive/controllers/selector-controller.ts b/packages/coding-agent/src/modes/interactive/controllers/selector-controller.ts
index 52785038e..bf58b654a 100644
--- a/packages/coding-agent/src/modes/interactive/controllers/selector-controller.ts
+++ b/packages/coding-agent/src/modes/interactive/controllers/selector-controller.ts
@@ -2,7 +2,7 @@ import type { ThinkingLevel } from "@oh-my-pi/pi-agent-core";
 import type { OAuthProvider } from "@oh-my-pi/pi-ai";
 import type { Component } from "@oh-my-pi/pi-tui";
 import { Input, Loader, Spacer, Text } from "@oh-my-pi/pi-tui";
-import { getAuthPath } from "../../../config";
+import { getAgentDbPath } from "../../../config";
 import { SessionManager } from "../../../core/session-manager";
 import { setPreferredImageProvider, setPreferredWebSearchProvider } from "../../../core/tools/index";
 import { disableProvider, enableProvider } from "../../../discovery";
@@ -546,7 +546,7 @@ export class SelectorController {
 								),
 							);
 							this.ctx.chatContainer.addChild(
-								new Text(theme.fg("dim", `Credentials saved to ${getAuthPath()}`), 1, 0),
+								new Text(theme.fg("dim", `Credentials saved to ${getAgentDbPath()}`), 1, 0),
 							);
 							this.ctx.ui.requestRender();
 						} catch (error: unknown) {
@@ -566,7 +566,7 @@ export class SelectorController {
 								),
 							);
 							this.ctx.chatContainer.addChild(
-								new Text(theme.fg("dim", `Credentials removed from ${getAuthPath()}`), 1, 0),
+								new Text(theme.fg("dim", `Credentials removed from ${getAgentDbPath()}`), 1, 0),
 							);
 							this.ctx.ui.requestRender();
 						} catch (error: unknown) {