review-delta

name	review-delta
description	Quick review of only changes since last commit using blast-radius detection. Token-efficient delta review. Use for fast iteration reviews during development, checking if recent edits broke anything, or reviewing a single commit.

Review Delta

Execution context: Cross-skill script paths use ../ relative references.

Focused, token-efficient review of the most recent changes and their impact.

When to use this skill

User request → Which review skill?
├─ "check my changes" / "did I break anything?" → review-delta (this skill)
├─ "quick review" / single commit → review-delta
├─ Risk is LOW/MEDIUM (from code-review workflow) → review-delta
├─ Risk is HIGH → escalate to review-pr or /code-review workflow
├─ "review this PR" / merge readiness → review-pr
└─ Multiple commits against base branch → review-pr

• Quick review during active development (after each commit)
• Checking if recent edits introduced bugs
• Want a lighter review than full PR review
• Reviewing a single commit (not multi-commit PR)

For full PR reviews (multiple commits, merge readiness) → use [review-pr] instead.

How to use it

1. Get recent changes (auto-detect)

bash ../code-graph/scripts/blast-radius.sh
# No args = auto-detects from git diff HEAD~1..HEAD

2. Read the risk level and follow escalation

• LOW: Skim changed files only. Check for obvious issues. Done.
• MEDIUM: Read changed files + direct callers. Check test gaps.
• HIGH: Escalate — recommend using /code-review workflow instead.

3. Focus review on blast-radius output

For each changed file:

• Correctness: does the code do what it should?
• Style: follows project conventions?
• Callers: do upstream consumers need updates?
• Tests: does changed behavior have test coverage?

4. Report findings

## Delta Review

- **Summary**: <one line>
- **Risk level**: <from blast-radius>
- **Issues**: <list with file:line>
- **Test gaps**: <untested changed functions>
- **Blast radius**: <N files impacted>

Advantages over full PR review

• Examines only changed + impacted code (5-10x fewer tokens)
• Auto-detects changes from git diff (no args needed)
• Fast iteration: run after each commit during development
• Naturally escalates to full review when risk is HIGH