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In src/useProfile.ts the effect depends on options, which is a new object on every render. Depend on userId instead. One edit, no tests.
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run / Gvs_C0YieAgoSkdPsCZjDTRr
Run by KeepShell1029
PASSED · All tests passed
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- 8,192 tokens in · 973 tokens out
- Inference time
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- Apple M4 Max, 48 GB
- Compute · nominal
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- 3.4B active params of 30.5B
- Prompts
- 1
- Board rank
- #7
- fastest · #6 least compute · #7 fewest tokens
- Submitted
- 2026-09-23
- Harness 0.1.2-dev · thinking off
Conversation
MODEL
I'll analyze the problem and fix the issue in `src/useProfile.ts` where the effect depends on `options` (a new object on every render) instead of `userId`.
First, let me examine the relevant files to understand the current implementation:
read_file · src/useProfile.ts
Arguments:
{
"path": "src/useProfile.ts"
}
Result:
1: import { useEffect, useState } from "react";
2:
3: import { fetchProfile, type Profile } from "./api";
4:
5: export function useProfile(userId: string) {
6: const [profile, setProfile] = useState<Profile | null>(null);
7: const [isLoading, setIsLoading] = useState(true);
8: const [error, setError] = useState<Error | null>(null);
9: const options = { userId, fields: ["name", "email"] as const };
10:
11: useEffect(() => {
12: let cancelled = false;
13:
14: setIsLoading(true);
15: fetchProfile(options)
16: .then((nextProfile) => {
17: if (!cancelled) {
18: setProfile(nextProfile);
19: }
20: })
21: .catch((reason: unknown) => {
22: if (!cancelled) {
23: setError(reason instanceof Error ? reason : new Error("Unable to load profile"));
24: }
25: })
26: .finally(() => {
27: if (!cancelled) {
28: setIsLoading(false);
29: }
30: });
31:
32: return () => {
33: cancelled = true;
34: };
35: }, [options]);
36:
37: return { profile, isLoading, error };
38: }MODEL
Now I can see the issue clearly. The `useEffect` hook depends on `options`, which is a new object created on every render (line 9). This causes the effect to run unnecessarily on every render instead of only when `userId` changes.
Let me also check how this hook is used in the SettingsPage to understand the full context:
read_file · src/SettingsPage.tsx
Arguments:
{
"path": "src/SettingsPage.tsx"
}
Result:
1: import { useProfile } from "./useProfile";
2:
3: interface SettingsPageProps {
4: userId: string;
5: }
6:
7: export function SettingsPage({ userId }: SettingsPageProps) {
8: const { profile, isLoading, error } = useProfile(userId);
9:
10: if (error) {
11: return <p role="alert">Could not load profile.</p>;
12: }
13:
14: if (isLoading && !profile) {
15: return <p role="status">Loading profile…</p>;
16: }
17:
18: if (!profile) {
19: return null;
20: }
21:
22: return (
23: <main>
24: <h1>Settings</h1>
25: <dl>
26: <dt>Name</dt>
27: <dd>{profile.name}</dd>
28: <dt>Email</dt>
29: <dd>{profile.email}</dd>
30: </dl>
31: </main>
32: );
33: }MODEL
I can see that `SettingsPage` passes `userId` to `useProfile`, and `useProfile` should only re-fetch when `userId` changes, not on every render.
The fix is to move the `options` object creation outside of the effect dependency array, or better yet, create the options object directly in the dependency array. Since `options` is just a simple object with `userId` and `fields`, I'll modify it so that the effect depends on `userId` instead:
edit_file · src/useProfile.ts
Arguments:
{
"new_text": "import { useEffect, useState } from \"react\";\n\nimport { fetchProfile, type Profile } from \"./api\";\n\nexport function useProfile(userId: string) {\n const [profile, setProfile] = useState\u003cProfile | null\u003e(null);\n const [isLoading, setIsLoading] = useState(true);\n const [error, setError] = useState\u003cError | null\u003e(null);\n\n useEffect(() =\u003e {\n let cancelled = false;\n const options = { userId, fields: [\"name\", \"email\"] as const };\n\n setIsLoading(true);\n fetchProfile(options)\n .then((nextProfile) =\u003e {\n if (!cancelled) {\n setProfile(nextProfile);\n }\n })\n .catch((reason: unknown) =\u003e {\n if (!cancelled) {\n setError(reason instanceof Error ? reason : new Error(\"Unable to load profile\"));\n }\n })\n .finally(() =\u003e {\n if (!cancelled) {\n setIsLoading(false);\n }\n });\n\n return () =\u003e {\n cancelled = true;\n };\n }, [userId]);\n\n return { profile, isLoading, error };\n}",
"old_text": "import { useEffect, useState } from \"react\";\n\nimport { fetchProfile, type Profile } from \"./api\";\n\nexport function useProfile(userId: string) {\n const [profile, setProfile] = useState\u003cProfile | null\u003e(null);\n const [isLoading, setIsLoading] = useState(true);\n const [error, setError] = useState\u003cError | null\u003e(null);\n const options = { userId, fields: [\"name\", \"email\"] as const };\n\n useEffect(() =\u003e {\n let cancelled = false;\n\n setIsLoading(true);\n fetchProfile(options)\n .then((nextProfile) =\u003e {\n if (!cancelled) {\n setProfile(nextProfile);\n }\n })\n .catch((reason: unknown) =\u003e {\n if (!cancelled) {\n setError(reason instanceof Error ? reason : new Error(\"Unable to load profile\"));\n }\n })\n .finally(() =\u003e {\n if (!cancelled) {\n setIsLoading(false);\n }\n });\n\n return () =\u003e {\n cancelled = true;\n };\n }, [options]);\n\n return { profile, isLoading, error };\n}",
"path": "src/useProfile.ts"
}
Result:
1 editMODEL
Let me run the tests to verify that my fix works correctly:
run_tests
Arguments:
{}
Result:
3 passed, 0 failed, 3 totalIncluded tests ran
MODEL
The tests are passing, which confirms that my fix is working correctly. Let me summarize what I did:
1. **Problem Identified**: In `src/useProfile.ts`, the `useEffect` hook was depending on `options` which is a new object created on every render, causing unnecessary re-requests to the server.
2. **Solution Applied**:
- Moved the creation of the `options` object inside the `useEffect` callback
- Changed the dependency array from `[options]` to `[userId]`
- This ensures that the effect only runs when `userId` changes, not on every render
3. **Result**: The profile is now fetched only once per user, as intended, instead of being re-requested on every render of the SettingsPage.
The fix is minimal and targeted - it addresses exactly the issue described in the problem statement without changing any other functionality.
Included tests ran
Final patch
--- a/src/useProfile.ts
+++ b/src/useProfile.ts
@@ -6,10 +6,10 @@
const [profile, setProfile] = useState<Profile | null>(null);
const [isLoading, setIsLoading] = useState(true);
const [error, setError] = useState<Error | null>(null);
- const options = { userId, fields: ["name", "email"] as const };
useEffect(() => {
let cancelled = false;
+ const options = { userId, fields: ["name", "email"] as const };
setIsLoading(true);
fetchProfile(options)
@@ -32,7 +32,7 @@
return () => {
cancelled = true;
};
- }, [options]);
+ }, [userId]);
return { profile, isLoading, error };
}