learn
Extract cross-session patterns from git history, PRs, and handoffs, then recommend artifacts (skill/rule/hook/agent) based on frequency thresholds. Use when consolidating recurring patterns into durable artifacts. For single-session reflection, use `reflect` instead.
What this skill does
# Learn
Extract patterns from git history, PRs, and handoffs to create durable artifacts (skills, rules, hooks).
**For single-session reflection, use `Skill("reflect")` instead.**
**Methodology:** Use `compound-learnings` skill for frequency thresholds and artifact categorization logic.
## Data Sources
| Source | Command | What to Extract |
|--------|---------|-----------------|
| Git commits | `git log --oneline -100` | Repeated fix types, patterns |
| PR descriptions | `gh pr list --state merged -L 20 --json title,body` | Lessons, decisions |
| Handoffs | `.agents/handoffs/*.md` (main worktree) | Patterns, What Worked/Failed |
| Existing learnings | `CLAUDE.md` Key Learnings section | Already encoded patterns |
## Process
### Step 1: Locate Main Worktree
```bash
MAIN_WORKTREE=$(git worktree list --porcelain | grep "^worktree" | head -1 | cut -d' ' -f2)
HANDOFF_DIR="$MAIN_WORKTREE/.agents/handoffs"
```
### Step 2: Gather Patterns
**Git history:**
```bash
git log --oneline -100 | cut -d' ' -f2-
```
**Merged PRs (if gh available):**
```bash
gh pr list --state merged -L 20 --json title,body 2>/dev/null
```
**Handoff files:**
```bash
ls "$HANDOFF_DIR"/*.md 2>/dev/null && cat "$HANDOFF_DIR"/*.md
```
**Existing Key Learnings:**
```bash
grep -A 50 "Key Learnings" CLAUDE.md 2>/dev/null
```
### Step 3: Analyze Patterns
Apply `compound-learnings` skill methodology:
1. Consolidate similar patterns by semantic meaning
2. Apply frequency thresholds (skip 1x, note 2x, recommend 3+, strong recommend 4+)
3. Categorize into artifact types using the decision tree
### Step 4: Present Findings
```markdown
## Compound Learnings Analysis
**Sources scanned:**
- Git commits: X
- PRs: Y
- Handoffs: Z
### Strong Signal (4+ occurrences)
| Pattern | Count | Artifact | Rationale |
|---------|-------|----------|-----------|
| ... | ... | ... | ... |
### Emerging Patterns (2-3 occurrences)
| Pattern | Count | Potential | Notes |
|---------|-------|-----------|-------|
| ... | ... | ... | ... |
### Recommended Actions
1. **[Artifact Type]**: `name`
- Draft content: ...
```
### Step 5: Create Artifacts
Use `AskUserQuestion` to confirm each recommendation:
- "Create these artifacts?"
If approved, create using appropriate tools:
- **Rules** → Edit CLAUDE.md or create lesson in .agents/lessons/
- **Skills** → Create in appropriate plugin's skills directory
- **Hooks** → Create in .claude/hooks/
- **Commands** → Create in appropriate plugin's commands directory
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