hezaohezao/github-code-review
Review PRs: diffs, inline comments via gh or REST.
npx skills add https://github.com/HezaoHezao/poirot --skill github-code-review
Perform code reviews on local changes before pushing, or review open PRs on
GitHub. Most of this skill uses plain git — the gh/curl split only
matters for PR-level interactions.
GITHUB_TOKEN env var or gh auth login)if command -v gh &>/dev/null && gh auth status &>/dev/null; then
AUTH="gh"
else
AUTH="git"
fi
REMOTE_URL=$(git remote get-url origin)
OWNER_REPO=$(echo "$REMOTE_URL" | sed -E 's|.*github\.com[:/]||; s|\.git$||')
OWNER=$(echo "$OWNER_REPO" | cut -d/ -f1)
REPO=$(echo "$OWNER_REPO" | cut -d/ -f2)
This is pure git — works everywhere, no API needed.
# Staged changes (what would be committed)
git diff --staged
# All changes vs main (what a PR would contain)
git diff main...HEAD
# File names only
git diff main...HEAD --name-only
# Stat summary (insertions/deletions per file)
git diff main...HEAD --stat
git diff main...HEAD --stat
git log main..HEAD --oneline
read_file on changed files for full context:git diff main...HEAD -- src/auth/login.py
# Debug statements, TODOs, console.logs left behind
git diff main...HEAD | grep -n "print(\|console\.log\|TODO\|FIXME\|HACK\|XXX\|debugger"
# Large files accidentally staged
git diff main...HEAD --stat | sort -t'|' -k2 -rn | head -10
# Secrets or credential patterns
git diff main...HEAD | grep -in "password\|secret\|api_key\|token.*=\|private_key"
# Merge conflict markers
git diff main...HEAD | grep -n "<<<<<<\|>>>>>>\|======="
## Code Review Summary
### Critical
- **src/auth.py:45** — SQL injection: user input passed directly to query.
Suggestion: Use parameterized queries.
### Warnings
- **src/models/user.py:23** — Password stored in plaintext. Use bcrypt or argon2.
- **src/api/routes.py:112** — No rate limiting on login endpoint.
### Suggestions
- **src/utils/helpers.py:8** — Duplicates logic in `src/core/utils.py:34`. Consolidate.
- **tests/test_auth.py** — Missing edge case: expired token test.
### Looks Good
- Clean separation of concerns in the middleware layer
- Good test coverage for the happy path
With gh:
gh pr view 123
gh pr diff 123
gh pr diff 123 --name-only
With git + curl:
PR_NUMBER=123
# Get PR details
curl -s \
-H "Authorization: token $GITHUB_TOKEN" \
https://api.github.com/repos/$OWNER/$REPO/pulls/$PR_NUMBER \
| python3 -c "
import sys, json
pr = json.load(sys.stdin)
print(f\"Title: {pr['title']}\")
print(f\"Author: {pr['user']['login']}\")
print(f\"Branch: {pr['head']['ref']} -> {pr['base']['ref']}\")
print(f\"State: {pr['state']}\")"
# List changed files
curl -s \
-H "Authorization: token $GITHUB_TOKEN" \
https://api.github.com/repos/$OWNER/$REPO/pulls/$PR_NUMBER/files \
| python3 -c "
import sys, json
for f in json.load(sys.stdin):
print(f\"{f['status']:10} +{f['additions']:-4} -{f['deletions']:-4} {f['filename']}\")"
This works with plain git — no gh needed:
# Fetch the PR branch and check it out
git fetch origin pull/123/head:pr-123
git checkout pr-123
# Now you can use read_file, bash grep, run tests, etc.
git diff main...pr-123
General PR comment — with gh:
gh pr comment 123 --body "Overall looks good, a few suggestions below."
General PR comment — with curl:
curl -s -X POST \
-H "Authorization: token $GITHUB_TOKEN" \
https://api.github.com/repos/$OWNER/$REPO/issues/$PR_NUMBER/comments \
-d '{"body": "Overall looks good, a few suggestions below."}'
Single inline comment — with gh (via API):
HEAD_SHA=$(gh pr view 123 --json headRefOid --jq '.headRefOid')
gh api repos/$OWNER/$REPO/pulls/123/comments \
--method POST \
-f body="This could be simplified with a list comprehension." \
-f path="src/auth/login.py" \
-f commit_id="$HEAD_SHA" \
-f line=45 \
-f side="RIGHT"
With gh:
gh pr review 123 --approve --body "LGTM!"
gh pr review 123 --request-changes --body "See inline comments."
gh pr review 123 --comment --body "Some suggestions, nothing blocking."
With curl — multi-comment review submitted atomically:
HEAD_SHA=$(curl -s \
-H "Authorization: token $GITHUB_TOKEN" \
https://api.github.com/repos/$OWNER/$REPO/pulls/$PR_NUMBER \
| python3 -c "import sys,json; print(json.load(sys.stdin)['head']['sha'])")
curl -s -X POST \
-H "Authorization: token $GITHUB_TOKEN" \
https://api.github.com/repos/$OWNER/$REPO/pulls/$PR_NUMBER/reviews \
-d "{
\"commit_id\": \"$HEAD_SHA\",
\"event\": \"COMMENT\",
\"body\": \"Code review\",
\"comments\": [
{\"path\": \"src/auth.py\", \"line\": 45, \"body\": \"Use parameterized queries to prevent SQL injection.\"},
{\"path\": \"src/models/user.py\", \"line\": 23, \"body\": \"Hash passwords with bcrypt before storing.\"}
]
}"
Event values: "APPROVE", "REQUEST_CHANGES", "COMMENT"
The line field refers to the line number in the *new* version of the file.
For deleted lines, use "side": "LEFT".
When performing a code review (local or PR), systematically check:
When the user asks you to "review the code" or "check before pushing":
git diff main...HEAD --stat — see scope of changesgit diff main...HEAD — read the full diffread_file if you need more contextTake hezaohezao/github-code-review from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.