From 78dc3a9582316eeabce7bb24c61ac14e34174205 Mon Sep 17 00:00:00 2001
From: fey <fey@emesal.net>
Date: Sun, 22 Feb 2026 16:11:27 +0000
Subject: [PATCH] fix(chat): don't override chibi's model with invalid
 openrouter name
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the TUI hardcoded model to "claude-sonnet-4-5" which is not a valid
openrouter model ID (needs "anthropic/" prefix). this caused chibi-json
to fail with a 400 error before making any LLM call — the root cause of
the "no visible response" bug in autonav chat with chibi harness.

fix: only pass DEFAULT_MODEL for non-chibi harnesses. chibi uses its
own config.toml default. navigator config.harness.model is threaded
through as an explicit override when set.
---
 packages/autonav/src/cli/nav-chat.ts       | 2 ++
 packages/autonav/src/conversation/index.ts | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/packages/autonav/src/cli/nav-chat.ts b/packages/autonav/src/cli/nav-chat.ts
index ab32995..399c37b 100644
--- a/packages/autonav/src/cli/nav-chat.ts
+++ b/packages/autonav/src/cli/nav-chat.ts
@@ -133,6 +133,7 @@ export async function run(args: string[]): Promise<void> {
     instructionsPath?: string;
     relatedNavigators?: Array<{ name: string; description?: string }>;
     sandbox?: { chat?: { enabled: boolean } };
+    harness?: { type?: string; model?: string };
   };
   let configContent: string;
   try {
@@ -219,6 +220,7 @@ export async function run(args: string[]): Promise<void> {
       mcpServers: Object.keys(mcpServers).length > 0 ? mcpServers : undefined,
       sandboxEnabled: chatSandboxEnabled,
       configJson: configContent,
+      model: config.harness?.model,
     });
 
     console.log("\n👋 Conversation ended.\n");
diff --git a/packages/autonav/src/conversation/index.ts b/packages/autonav/src/conversation/index.ts
index de93580..ba6bbf4 100644
--- a/packages/autonav/src/conversation/index.ts
+++ b/packages/autonav/src/conversation/index.ts
@@ -37,6 +37,8 @@ export interface ConversationOptions {
   sandboxEnabled?: boolean;
   /** Raw config.json content for config-aware prompts */
   configJson?: string;
+  /** Model override for the harness. When undefined, the harness uses its own default. */
+  model?: string;
 }
 
 /**