Detached HEAD state - identify the detached HEAD commit
Tests ability to identify a detached HEAD commit using reflog. Evaluates detached-HEAD diagnosis and recovery.
Baseline Repository
These commands set up the repo before the model sees the prompt. They define the starting file structure, staged changes, and Git history.
- 01
git init - 02
git config user.email 'test@test.com' - 03
git config user.name 'Test User' - 04
echo 'line1' > data.txt - 05
git add data.txt - 06
git commit -m 'First commit' - 07
echo 'line2' >> data.txt - 08
git add data.txt - 09
git commit -m 'Second commit' - 10
echo 'line3' >> data.txt - 11
git add data.txt - 12
git commit -m 'Third commit - WIP experimental' - 13
git checkout HEAD~1
Prompt
You are in detached HEAD state at HEAD~1. You made some experimental changes and committed them in a detached HEAD state. The commit 'Third commit - WIP experimental' was made on a detached HEAD. Use git reflog to find the commit hash of that experimental commit so you can return to it.
Expected
Third commit - WIP experimental
Campaign Evidence
Loading campaign evidence…
Model Outputs (14)
The commit hash for the experimental commit "Third commit - WIP experimental" is **fd2b9f116bb054eaaf9e31ea408b420d1e60e89f**. You can return to it using:
```bash
git checkout fd2b9f116bb054eaaf9e31ea408b420d1e60e89f
```
Based on the Git reflog you provided, the commit hash for the experimental commit made in detached HEAD state is:
**`b7fbdbbf4afab41ad3d974f92e58261bfaed9f0e`**
This is the commit labeled `HEAD@{1}: commit: Third commit - WIP experimental`.
To return to this commit, you can use either of these commands:
```bash
git checkout b7fbdbbf4afab41ad3d974f92e58261bfaed9f0e
```
Or if you want to create a branch at this point to preserve your work:
```bash
git checkout -b experimental-branch b7fbdbbf4afab41ad3d974f92e58261bfaed9f0e
```
The second option is generally recommended because it creates a named branch, making it easier to track and manage your experimental changes going forward.
c52eeb11d25dff337b2590101740b4fb05170669
JSON Schema
Structured Output
(raw) {"ref": "c52eeb11d25dff337b2590101740b4fb05170669"}
Based on the `git reflog` output, the commit hash for the experimental commit "Third commit - WIP experimental" is:
```
6abbb4ea339fa88f381e083b797b627ef5a0567e
```
You can return to this commit by running:
```bash
git checkout 6abbb4ea339fa88f381e083b797b627ef5a0567e
```
Or if you want to create a new branch at this commit to preserve it:
```bash
git checkout -b experimental-branch 6abbb4ea339fa88f381e083b797b627ef5a0567e
```
ad48f366f707ba74b269265a402412eb352607ca
JSON Schema
Structured Output
(raw) {"ref": "ad48f366f707ba74b269265a402412eb352607ca"}
The commit you're looking for is recorded in the reflog entry **HEAD@{1}** with the message:
```
Third commit - WIP experimental
```
Its SHA‑1 hash is:
```
9f3ef49ce2f3ee57c3ba97e74e905e970003e68f
```
You can return to that exact commit by checking it out:
```bash
git checkout 9f3ef49ce2f3ee57c3ba97e74e905e970003e68f
```
*(You can also use the short prefix `9f3ef49c` if Git can disambiguate it, or just type the first 7 characters `9f3ef49`.)*
f5e0d7250ad4659342ac3aac0bc76f5d9b8d2474
JSON Schema
Structured Output
(raw) {
"ref": "f5e0d7250ad4659342ac3aac0bc76f5d9b8d2474"
}
The commit hash for the experimental commit **"Third commit - WIP experimental"** is explicitly listed in the `git reflog` output:
```
ab7a4efa47523f5e500cb5f18305adb12d8cdb81 HEAD@{1}: commit: Third commit - WIP experimental
```
### Why?
- Git reflog shows the history of HEAD changes. The `HEAD@{N}` notation refers to the state of HEAD at a specific point in time.
- `HEAD@{1}` (the most recent reference before the current state) corresponds to the commit message **"Third commit - WIP experimental"**.
- The hash `ab7a4efa47523f5e500cb5f18305adb12d8cdb81` is the unique identifier for that commit.
### How to return to it?
To move back to this specific commit:
```bash
git checkout ab7a4efa47523f5e500cb5f18305adb12d8cdb81
```
### Key Takeaway:
- The reflog entry `HEAD@{1}` directly points to the commit hash you need (`ab7a4efa47523f5e500cb5f18305adb12d8cdb81`).
- You don’t need to parse or derive it—this hash is explicitly provided in the reflog.
> 💡 **Note**: If you run `git checkout ab7a4efa47523f5e500cb5f18305adb12d8cdb81`, you’ll be back at the detached HEAD state of that commit. To make it a named branch later, create a branch first (e.g., `git checkout -b temp ab7a...`), then switch to it. But for now, just use the hash to return to the commit.
Based on the git reflog you provided, I can see the commit hash for your experimental commit.
The commit **"Third commit - WIP experimental"** has the hash:
**`a87495c543232eb68516ae8b0ee1ef57d600bab5`**
You can see this at `HEAD@{1}` in your reflog output.
To return to this experimental commit, you can run:
```bash
git checkout a87495c543232eb68516ae8b0ee1ef57d600bab5
```
Or simply use the reflog reference:
```bash
git checkout HEAD@{1}
```
This will put you back at that experimental commit where you made your WIP changes.
3f8fbe38a81bc83da7fc7f4ce7f09e47797ff422
JSON Schema
Structured Output
(raw) {"ref": "3f8fbe38a81bc83da7fc7f4ce7f09e47797ff422"}
I can see from the git reflog that you're looking for the commit "Third commit - WIP experimental" which was made in a detached HEAD state.
Looking at the reflog output, the commit hash you need is **1c12f8993e01aebd97a72bf04f895dd778820247**.
This corresponds to:
- `HEAD@{1}: commit: Third commit - WIP experimental`
To return to this experimental commit, you can use:
```bash
git checkout 1c12f8993e01aebd97a72bf04f895dd778820247
```
This will put you back in detached HEAD state at your experimental commit, allowing you to continue working with those changes.
ead70ee3f70354be3a3c74c15a331a90f4e9ee65
JSON Schema
Structured Output
(raw) {"ref": "ead70ee3f70354be3a3c74c15a331a90f4e9ee65"}
Invalid JSON. Output: Thecommit hash for `Third commit - WIP experimental` is **fe4ccd891a816a1c3f4d54cd5efbe4f231c89357**.
To return to it, run:
```bash
git checkout fe4ccd891a816a1c3f4d54cd5efbe4f231c89357
```
or (with newer Git):
```bash
git switch --detach fe4ccd891a816a1c3f4d54cd5efbe4f231c89357
```
JSON Schema
Structured Output
Structured Output Error
Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)
Failure: Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)
REF-DETACHED-HEAD-AT-HEAD~1
JSON Schema
Structured Output
(raw) {
"ref": "REF-DETACHED-HEAD-AT-HEAD~1"
}
Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Third commit - WIP experimental'