refactor(windows): re-apply guidance with minimal formatting changes

Addresses feedback about formatting noise by reverting system-prompt.ts and re-applying logic minimally. PR template removed (moved to separate PR).

src/agents/pi-embedded-helpers.isfailovererrormessage.test.ts

@@ -14,6 +14,8 @@ describe("isFailoverErrorMessage", () => {
     const samples = [
       "invalid api key",
       "429 rate limit exceeded",
+      "No available auth profile for openai-codex (all in cooldown or unavailable).",
+      "Provider openai-codex is in cooldown (all profiles unavailable)",
       "Your credit balance is too low",
       "request timed out",
       "invalid request format",

src/agents/pi-embedded-helpers/errors.ts

@@ -362,6 +362,10 @@ const ERROR_PATTERNS = {
     "quota exceeded",
     "resource_exhausted",
     "usage limit",
+    // Auth-profile selection can fail due to provider-wide cooldown after repeated rate limits.
+    // Treat as rate_limit so model fallback can engage even before a request is sent.
+    /all in cooldown/i,
+    /in cooldown \(all profiles unavailable\)/i,
   ],
   overloaded: [/overloaded_error|"type"\s*:\s*"overloaded_error"/i, "overloaded"],
   timeout: ["timeout", "timed out", "deadline exceeded", "context deadline exceeded"],
@@ -388,6 +392,8 @@ const ERROR_PATTERNS = {
     /\b403\b/,
     "no credentials found",
     "no api key found",
+    // Agent can fail before request if no usable auth profile exists.
+    /no available auth profile/i,
   ],
   format: [
     "string should match pattern",

src/agents/system-prompt.ts

@@ -399,6 +399,17 @@ export function buildAgentSystemPrompt(params: {
     "Treat this directory as the single global workspace for file operations unless explicitly instructed otherwise.",
     ...workspaceNotes,
     "",
+    ...(runtimeInfo?.os?.toLowerCase().includes("windows")
+      ? [
+        "## Windows Shell Guidance",
+        "You are running on Windows (PowerShell).",
+        "- Use PowerShell syntax (e.g. `$env:VAR` instead of `%VAR%` or `$VAR`).",
+        "- Do NOT use Unix commands like `grep`, `sed`, `awk`, `head`, `tail` in exec/shell (PowerShell) commands unless you are sure they are installed. Pi's built-in tools named `grep`, `find`, and `ls` are safe to use.",
+        "- Use `findstr` or `Select-String` instead of `grep`.",
+        "- Use `Get-ChildItem` (dir/ls) with `-Recurse` instead of `find`.",
+        "",
+      ]
+      : []),
     ...docsSection,
     params.sandboxInfo?.enabled ? "## Sandbox" : "",
     params.sandboxInfo?.enabled
@@ -410,8 +421,7 @@ export function buildAgentSystemPrompt(params: {
           ? `Sandbox workspace: ${params.sandboxInfo.workspaceDir}`
           : "",
         params.sandboxInfo.workspaceAccess
-            ? `Agent workspace access: ${params.sandboxInfo.workspaceAccess}${
+          ? `Agent workspace access: ${params.sandboxInfo.workspaceAccess}${params.sandboxInfo.agentWorkspaceMount
-                params.sandboxInfo.agentWorkspaceMount
             ? ` (mounted at ${params.sandboxInfo.agentWorkspaceMount})`
             : ""
           }`