Your Antigravity commit assistant is suddenly not producing commit messages. The tool runs but leaves the message empty or stalls with no output.

Antigravity not generating commit messages in Git

Users report that Antigravity stops writing commit messages when creating commits, leaving an empty editor or failing silently. Some setups also show transient errors like 401 unauthorized, 404 model not found, or 429 quota exceeded. If you are seeing quota or rate limit messages, check our quick notes on limits and retries here: quota errors in Antigravity.

Solution Overview

Aspect	Detail
Root Cause	Missing or expired API credentials, outdated Antigravity version, or a broken Git hook that never invokes the generator
Primary Fix	Re authenticate, update Antigravity, reinstall the prepare commit hook, and set a valid model
Complexity	Easy
Estimated Time	10 to 20 minutes

Fix Antigravity commit message generation

Step-by-Step Solution

Step 1 Confirm your environment and version

• Verify the CLI is available and record the version.

antigravity --version
which antigravity

If the command is not found or the version is older than your team baseline, update it. Step 2 Update Antigravity to the latest release

• Python install

python3 -m pip install --upgrade antigravity

• Node install

npm i -g antigravity

Use the same installer your team originally used to avoid path conflicts. If you run into version mismatch issues, see the focused checklist here: version mismatch fixes. Step 3 Re authenticate and set the API key Most generation failures come from expired tokens or missing keys.

• If Antigravity supports interactive auth:

antigravity auth login
antigravity auth status

• If it uses an environment key:

export ANTIGRAVITY_API_KEY="paste-your-key-here"
Optional for shells that persist
echo 'export ANTIGRAVITY_API_KEY="paste-your-key-here"' >> ~/.bashrc
source ~/.bashrc

• Verify authentication

antigravity doctor

Look for a green check that credentials are valid. If the tool reports model not found or models missing after login, review account and model access here: account and model availability issues. Step 4 Select a valid model and region Pick an available model that your account can call. Example using Gemini models.

antigravity config set model gemini-1.5-pro
antigravity config set region us
antigravity config get

• If the model is deprecated, switch to a supported one such as gemini-1.5-pro or gemini-1.0-pro. See current availability in Google AI model docs: https://ai.google.dev/models

Step 5 Reinstall the Git hook that generates messages Antigravity usually integrates via the prepare commit msg or commit msg hook.

• Automatic installer

antigravity hook install
antigravity hook status

• Manual prepare commit msg example

Create or replace .git/hooks/prepare-commit-msg with execute permission.

cat > .git/hooks/prepare-commit-msg <<'SH'
#!/usr/bin/env bash
Skip if message already provided
case "$2" in
 commit|merge|squash) exit 0 ;;
esac

Generate commit message with Antigravity using staged diff
MSG="$(git diff --cached | antigravity commit generate --stdin)"
if [ -n "$MSG" ]; then
 printf "%s\n" "$MSG" > "$1"
fi
SH
chmod +x .git/hooks/prepare-commit-msg

See the Git hooks reference for when each hook runs: https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks Step 6 Test the flow end to end

git checkout -b ag-fix-test
echo "test" > ag-check.txt
git add ag-check.txt
git commit

You should see a generated subject and body. If the editor opens empty, run with verbose logs.

ANTIGRAVITY_DEBUG=1 git commit

Step 7 Handle quota and transient failures If the hook shows 429 or rate limit.

antigravity config set retry.max_attempts 3
antigravity config set retry.backoff_ms 800

Run a quick explicit generation test outside the hook to confirm the model responds.

git diff --cached | antigravity commit generate --stdin --model gemini-1.5-pro

Alternative Fixes & Workarounds

Use a direct CLI call instead of the hook Run the generator and pipe into git commit.

git diff --cached | antigravity commit generate --stdin > .git/AG_MSG.txt
git commit -F .git/AG_MSG.txt

Fallback to a local model or a lighter remote model If outages persist, switch temporarily.

antigravity config set model gemini-1.5-flash

Pin a known good version If a recent upgrade broke hooks, pin the last working build.

• Python

python3 -m pip install "antigravity==X.Y.Z"

• Node

npm i -g "antigravity@X.Y.Z"

Troubleshooting Tips

• Confirm the hook file is executable and not blocked by core hooksPath.

git config --get core.hooksPath
ls -l .git/hooks/prepare-commit-msg

• Check proxy or firewall rules that might block outbound requests. Try a curl to the model endpoint you use.
• If the tool outputs 401 or invalid key, reissue the API key and export it again.
• For 404 model not found, verify the exact model id and region pairing in your config.
• For editor still empty, dump hook logs to a file and inspect.

ANTIGRAVITY_DEBUG=1 git commit 2> .git/antigravity.debug.log

If you repeatedly see limit messages, our short guide covers cleanup and retry strategy: quota errors in Antigravity.

Best Practices

• Keep Antigravity and its dependencies current. Schedule a monthly update window and validate with a smoke test branch.
• Store API keys in a secure secrets manager and source them in your shell profile. Rotate keys regularly.
• Pin a specific model in your repo config to avoid silent changes when defaults update.
• Commit the hook via a managed hooksPath so the whole team uses the same script.
• Track quota and set conservative retry with exponential backoff.

Final Thought

Most non generating commit issues come from credentials, model configuration, or a broken hook. With a quick update, re authentication, a clean hook, and a supported model, Antigravity will reliably write your commit messages again.