host-bin: external-extension loader + claude credential wiring

Add loadExternalExtensions(): fault-isolated dynamic import of out-of-repo
extensions declared via DISPATCH_EXTERNAL_EXTENSIONS. main.ts assembles the
credential-store in boot() so a 'claude' credential is registered when an
external anthropic provider is loaded; config.ts surfaces the anthropic model /
credential-key settings those extensions read.

1 files changed, 11 insertions, 0 deletions

diff --git a/packages/host-bin/src/config.ts b/packages/host-bin/src/config.ts
index cf6b0ce..f79ef4b 100644
--- a/packages/host-bin/src/config.ts
+++ b/packages/host-bin/src/config.ts
@@ -20,6 +20,17 @@ export function envToConfigMap(
 		map["provider.openai-compat.model"] = model;
 	}
 
+	// Optional settings consumed by external extensions (e.g. the Claude provider).
+	const anthropicModel = env.DISPATCH_ANTHROPIC_MODEL;
+	if (anthropicModel !== undefined) {
+		map["provider.anthropic.model"] = anthropicModel;
+	}
+
+	const claudeCredentialKey = env.DISPATCH_CLAUDE_CREDENTIAL_KEY;
+	if (claudeCredentialKey !== undefined) {
+		map["claude.credentialKey"] = claudeCredentialKey;
+	}
+
 	const httpPort = env.BACKEND_PORT ?? env.PORT;
 	if (httpPort !== undefined) {
 		const n = Number(httpPort);