diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4678dd1..5a8cc83 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,7 @@ concurrency:
 jobs:
   test:
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v5
       - uses: oven-sh/setup-bun@v2
diff --git a/bun.lockb b/bun.lockb
index 48ace75..b79cd09 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/package.json b/package.json
index 51ede25..66aee5b 100644
--- a/package.json
+++ b/package.json
@@ -25,9 +25,9 @@
   },
   "dependencies": {
     "@clack/prompts": "^1.3.0",
-    "@earendil-works/pi-agent-core": "^0.74.1",
-    "@earendil-works/pi-ai": "^0.79.7",
-    "@earendil-works/pi-coding-agent": "^0.79.7",
+    "@earendil-works/pi-agent-core": "0.84.4",
+    "@earendil-works/pi-ai": "0.84.4",
+    "@earendil-works/pi-coding-agent": "0.84.4",
     "discord.js": "^14.16.3",
     "mdast-util-from-markdown": "^2.0.3",
     "remark-gfm": "^4.0.1",
diff --git a/src/agent/installStreamingSender.ts b/src/agent/installStreamingSender.ts
index b074ef6..beced4d 100644
--- a/src/agent/installStreamingSender.ts
+++ b/src/agent/installStreamingSender.ts
@@ -83,6 +83,17 @@ export function installStreamingSender(args: {
         const stopReason = (message as { stopReason?: string }).stopReason;
         const errorMessage = (message as { errorMessage?: string }).errorMessage;
         if (stopReason === "error" && errorMessage) {
+          // Log to journal too — the channel-side "agent error" line is
+          // easy to miss (no debug-channel copy, no stderr) so operators
+          // digging into `journalctl -u …` after the fact see nothing.
+          // Include provider/model for post-mortem: 401/403s here almost
+          // always trace back to a specific provider's credential or a
+          // stale models.json format (e.g. the pi 0.79→0.84 config-value
+          // syntax change).
+          const provider = (message as { provider?: string }).provider;
+          const model = (message as { model?: string }).model;
+          const modelTag = provider || model ? ` [${provider ?? "?"}/${model ?? "?"}]` : "";
+          console.error(`[stream] agent turn errored${modelTag}: ${errorMessage}`);
           sender
             .sendError(new Error(errorMessage))
             .catch((error) => console.error("[stream] sendError failed:", error));
diff --git a/src/createAgentPool.ts b/src/createAgentPool.ts
index 679fde4..b1774a6 100644
--- a/src/createAgentPool.ts
+++ b/src/createAgentPool.ts
@@ -299,7 +299,7 @@ export function createAgentPool(args: {
     // match.
     const sessionModel =
       defaultProvider && defaultModel
-        ? services.modelRegistry?.find(defaultProvider, defaultModel) ?? undefined
+        ? services.modelRuntime?.getModel(defaultProvider, defaultModel) ?? undefined
         : undefined;
 
     const { session } = await createAgentSessionFromServices({
diff --git a/src/io/createDebugLogger.ts b/src/io/createDebugLogger.ts
index 0547c79..3084093 100644
--- a/src/io/createDebugLogger.ts
+++ b/src/io/createDebugLogger.ts
@@ -171,9 +171,51 @@ export function createDebugLogger(args: {
       const startLog = pendingCompactionStartLog;
       pendingCompactionStartLog = null;
       postCompactionEnd(event, startLog);
+      return;
+    }
+    // Surface model-turn errors (auth failures, provider 5xx, malformed
+    // responses) into the debug channel. The channel-facing `sendError`
+    // is a single terse line in the *user* channel; without a copy here,
+    // operators monitoring debug have no signal that anything went wrong.
+    if (event.type === "turn_end" && isAssistantMessageEnd(event.message)) {
+      const msg = event.message as {
+        stopReason?: string;
+        errorMessage?: string;
+        provider?: string;
+        model?: string;
+      };
+      if (msg.stopReason === "error" && msg.errorMessage) {
+        postTurnError({
+          errorMessage: msg.errorMessage,
+          provider: msg.provider,
+          model: msg.model,
+        }).catch((error) => console.error("[debugLogger] turn-error post failed:", error));
+      }
     }
   });
 
+  async function postTurnError(args: {
+    errorMessage: string;
+    provider?: string;
+    model?: string;
+  }): Promise<void> {
+    const channel = await getDebugChannel();
+    if (!channel) return;
+    const link = sourceMessageUrl ?? (await getChannelLink());
+    const head = link ? `[agent error](<${link}>)` : "agent error";
+    const modelTag =
+      args.provider || args.model ? ` · ${args.provider ?? "?"}/${args.model ?? "?"}` : "";
+    const text = `-# ⚠️ ${head}${modelTag}: ${sanitizeBackticks(args.errorMessage)}`.slice(
+      0,
+      hardCharLimit,
+    );
+    await sendDebugMessage({
+      channel,
+      content: text,
+      errorContext: "turn-error post failed",
+    });
+  }
+
   async function postCompactionStart(reason: string): Promise<string | null> {
     const channel = await getDebugChannel();
     if (!channel) return null;