fix: address adversarial review findings for #3576

- Use `git reset --hard <sha>` for rollback instead of `git branch -f`
  which fails on checked-out branches and worktrees
- Clear pendingProviderRegistrations after preflush to prevent duplicate
  registration when bindCore() runs
- Process Ollama stream content on terminal `done:true` chunks to avoid
  truncating trailing assistant text

packages/pi-coding-agent/src/core/sdk.ts

@@ -221,9 +221,8 @@ export async function createAgentSession(options: CreateAgentSessionOptions = {}
 	for (const { name, config } of extensionsForModelResolution.runtime.pendingProviderRegistrations) {
 		modelRegistry.registerProvider(name, config);
 	}
-	// Note: we do NOT clear pendingProviderRegistrations here — bindCore() will iterate
-	// an empty array harmlessly, and clearing here would require the runtime to track
-	// whether the flush already happened.
+	// Clear the queue so bindCore() doesn't re-register the same providers.
+	extensionsForModelResolution.runtime.pendingProviderRegistrations = [];
 
 	// If still no model, use findInitialModel (checks settings default, then provider defaults)
 	if (!model) {

src/resources/extensions/gsd/safety/git-checkpoint.ts

@@ -72,20 +72,10 @@ export function rollbackToCheckpoint(
       return false;
     }
 
-    // Reset working tree
-    execFileSync("git", ["reset", "--hard"], {
-      cwd: basePath,
-      stdio: ["ignore", "pipe", "pipe"],
-    });
-
-    // Move branch pointer back to checkpoint
-    execFileSync("git", ["branch", "-f", branch, sha], {
-      cwd: basePath,
-      stdio: ["ignore", "pipe", "pipe"],
-    });
-
-    // Sync working tree with moved branch
-    execFileSync("git", ["reset", "--hard"], {
+    // Reset branch pointer and working tree to checkpoint SHA in one step.
+    // Using `git reset --hard <sha>` works on the currently checked-out branch
+    // (unlike `git branch -f` which is rejected for checked-out branches).
+    execFileSync("git", ["reset", "--hard", sha], {
       cwd: basePath,
       stdio: ["ignore", "pipe", "pipe"],
     });

src/resources/extensions/ollama/ollama-chat-provider.ts

@@ -149,7 +149,7 @@ export function streamOllamaChat(
 				// Handle text content — process independently of tool_calls
 				// (a chunk may contain both content and tool_calls)
 				const content = chunk.message?.content ?? "";
-				if (content && !chunk.done) {
+				if (content) {
 					if (thinkParser) {
 						processChunks(thinkParser.push(content));
 					} else {