fix(coding-agent): remove global fetch override closes #4619

packages/coding-agent/CHANGELOG.md

@@ -2,9 +2,15 @@
 
 ## [Unreleased]
 
+### Breaking Changes
+
+- Raised the minimum supported Node.js version to 22.19.0.
+
 ### Fixed
 
 - Fixed user-scoped npm pi packages to install under `~/.pi/agent/npm/` instead of npm's global package root, avoiding permission errors with system-managed Node installs ([#4587](https://github.com/earendil-works/pi/issues/4587)).
+- Fixed Mistral requests failing after the global fetch proxy/timeout workaround by removing the custom fetch override and using undici 8 dispatcher support instead ([#4619](https://github.com/earendil-works/pi/issues/4619)).
+- Fixed default output token requests for models whose advertised output limit is effectively their full context window, avoiding impossible provider requests inherited from `@earendil-works/pi-ai` ([#4614](https://github.com/earendil-works/pi/issues/4614)).
 
 ## [0.74.1] - 2026-05-16
 

packages/coding-agent/package.json

@@ -52,7 +52,7 @@
 		"minimatch": "^10.2.3",
 		"proper-lockfile": "^4.1.2",
 		"typebox": "^1.1.24",
-		"undici": "^7.19.1",
+		"undici": "^8.3.0",
 		"yaml": "^2.8.2"
 	},
 	"overrides": {
@@ -90,6 +90,6 @@
 		"directory": "packages/coding-agent"
 	},
 	"engines": {
-		"node": ">=20.6.0"
+		"node": ">=22.19.0"
 	}
 }

packages/coding-agent/src/cli.ts

@@ -5,7 +5,7 @@
  *
  * Test with: npx tsx src/cli-new.ts [args...]
  */
-import { EnvHttpProxyAgent, setGlobalDispatcher, fetch as undiciFetch } from "undici";
+import { EnvHttpProxyAgent, setGlobalDispatcher } from "undici";
 import { APP_NAME } from "./config.js";
 import { main } from "./main.js";
 
@@ -17,15 +17,6 @@ process.emitWarning = (() => {}) as typeof process.emitWarning;
 // (e.g. vLLM buffering a large tool call) exceed that and abort the SSE stream
 // with UND_ERR_BODY_TIMEOUT. Disable both — provider SDKs enforce their own
 // AbortController-based deadlines via retry.provider.timeoutMs.
-// Node 26 uses an internal undici for globalThis.fetch that does not honor npm
-// undici's global dispatcher, so route global fetch through npm undici as well.
-const dispatcher = new EnvHttpProxyAgent({ bodyTimeout: 0, headersTimeout: 0 });
-setGlobalDispatcher(dispatcher);
-const fetchWithDispatcher = undiciFetch as unknown as typeof fetch;
-globalThis.fetch = (input, init) =>
-	fetchWithDispatcher(input, {
-		...init,
-		dispatcher,
-	} as unknown as RequestInit);
+setGlobalDispatcher(new EnvHttpProxyAgent({ bodyTimeout: 0, headersTimeout: 0 }));
 
 main(process.argv.slice(2));