Gstack Learn

---
name: learn
description: "Manage project learnings. Review, search, prune, and export what gstack has learned across sessions. Use when asked to \"what have we learned\", \"show learnings\", \"prune stale learnings\", or \"export learnings\". Proactively suggest when the user asks about past patterns or wonders \"didn't we fix this before?\"."
allowed-tools: Read, Glob, Grep
---

## Skill routing

When the user's request matches an available skill, invoke it via the Skill tool. When in doubt, invoke the skill.

Key routing rules:
- Product ideas/brainstorming → invoke /office-hours
- Strategy/scope → invoke /plan-ceo-review
- Architecture → invoke /plan-eng-review
- Design system/plan review → invoke /design-consultation or /plan-design-review
- Full review pipeline → invoke /autoplan
- Bugs/errors → invoke /investigate
- QA/testing site behavior → invoke /qa or /qa-only
- Code review/diff check → invoke /review
- Visual polish → invoke /design-review
- Ship/deploy/PR → invoke /ship or /land-and-deploy
- Save progress → invoke /context-save
- Resume context → invoke /context-restore
```

Then commit the change: `git add CLAUDE.md && git commit -m "chore: add gstack skill routing rules to CLAUDE.md"`

If B: run `~/.claude/skills/gstack/bin/gstack-config set routing_declined true` and say they can re-enable with `gstack-config set routing_declined false`.

This only happens once per project. Skip if `HAS_ROUTING` is `yes` or `ROUTING_DECLINED` is `true`.

If `VENDORED_GSTACK` is `yes`, warn once via AskUserQuestion unless `~/.gstack/.vendoring-warned-$SLUG` exists:

> This project has gstack vendored in `.claude/skills/gstack/`. Vendoring is deprecated.
> Migrate to team mode?

Options:
- A) Yes, migrate to team mode now
- B) No, I'll handle it myself

If A:
1. Run `git rm -r .claude/skills/gstack/`
2. Run `echo '.claude/skills/gstack/' >> .gitignore`
3. Run `~/.claude/skills/gstack/bin/gstack-team-init required` (or `optional`)
4. Run `git add .claude/ .gitignore CLAUDE.md && git commit -m "chore: migrate gstack from vendored to team mode"`
5. Tell the user: "Done. Each developer now runs: `cd ~/.claude/skills/gstack && ./setup --team`"

If B: say "OK, you're on your own to keep the vendored copy up to date."

Always run (regardless of choice):
```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)" 2>/dev/null || true
touch ~/.gstack/.vendoring-warned-${SLUG:-unknown}
```

If marker exists, skip.

If `SPAWNED_SESSION` is `"true"`, you are running inside a session spawned by an
AI orchestrator (e.g., OpenClaw). In spawned sessions:
- Do NOT use AskUserQuestion for interactive prompts. Auto-choose the recommended option.
- Do NOT run upgrade checks, telemetry prompts, routing injection, or lake intro.
- Focus on completing the task and reporting results via prose output.
- End with a completion report: what shipped, decisions made, anything uncertain.

## Detect command

Parse the user's input to determine which command to run:

- `/learn` (no arguments) → **Show recent**
- `/learn search <query>` → **Search**
- `/learn prune` → **Prune**
- `/learn export` → **Export**
- `/learn stats` → **Stats**
- `/learn add` → **Manual add**

---

## Show recent (default)

Show the most recent 20 learnings, grouped by type.

```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
~/.claude/skills/gstack/bin/gstack-learnings-search --limit 20 2>/dev/null || echo "No learnings yet."
```

Present the output in a readable format. If no learnings exist, tell the user:
"No learnings recorded yet. As you use /review, /ship, /investigate, and other skills,
gstack will automatically capture patterns, pitfalls, and insights it discovers."

---

## Search

```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
~/.claude/skills/gstack/bin/gstack-learnings-search --query "USER_QUERY" --limit 20 2>/dev/null || echo "No matches."
```

Replace USER_QUERY with the user's search terms. Present results clearly.

---

## Prune

Check learnings for staleness and contradictions.

```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
~/.claude/skills/gstack/bin/gstack-learnings-search --limit 100 2>/dev/null
```

For each learning in the output:

1. **File existence check:** If the learning has a `files` field, check whether those
   files still exist in the repo using Glob. If any referenced files are deleted, flag:
   "STALE: [key] references deleted file [path]"

2. **Contradiction check:** Look for learnings with the same `key` but different or
   opposite `insight` values. Flag: "CONFLICT: [key] has contradicting entries —
   [insight A] vs [insight B]"

Present each flagged entry via AskUserQuestion:
- A) Remove this learning
- B) Keep it
- C) Update it (I'll tell you what to change)

For removals, read the learnings.jsonl file and remove the matching line, then write
back. For updates, append a new entry with the corrected insight (append-only, the
latest entry wins).

---

## Export

Export learnings as markdown suitable for adding to CLAUDE.md or project documentation.

```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
~/.claude/skills/gstack/bin/gstack-learnings-search --limit 50 2>/dev/null
```

Format the output as a markdown section:

```markdown
## Project Learnings

### Patterns
- **[key]**: [insight] (confidence: N/10)

### Pitfalls
- **[key]**: [insight] (confidence: N/10)

### Preferences
- **[key]**: [insight]

### Architecture
- **[key]**: [insight] (confidence: N/10)
```

Present the formatted output to the user. Ask if they want to append it to CLAUDE.md
or save it as a separate file.

---

## Stats

Show summary statistics about the project's learnings.

```bash
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
eval "$(~/.claude/skills/gstack/bin/gstack-paths)"
LEARN_FILE="$GSTACK_STATE_ROOT/projects/$SLUG/learnings.jsonl"
if [ -f "$LEARN_FILE" ]; then
  TOTAL=$(wc -l < "$LEARN_FILE" | tr -d ' ')
  echo "TOTAL: $TOTAL entries"
  # Count by type (after dedup)
  cat "$LEARN_FILE" | bun -e "
    const lines = (await Bun.stdin.text()).trim().split('\n').filter(Boolean);
    const seen = new Map();
    for (const line of lines) {
      try {
        const e = JSON.parse(line);
        const dk = (e.key||'') + '|' + (e.type||'');
        const existing = seen.get(dk);
        if (!existing || new Date(e.ts) > new Date(existing.ts)) seen.set(dk, e);
      } catch {}
    }
    const byType = {};
    const bySource = {};
    let totalConf = 0;
    for (const e of seen.values()) {
      byType[e.type] = (byType[e.type]||0) + 1;
      bySource[e.source] = (bySource[e.source]||0) + 1;
      totalConf += e.confidence || 0;
    }
    console.log('UNIQUE: ' + seen.size + ' (after dedup)');
    console.log('RAW_ENTRIES: ' + lines.length);
    console.log('BY_TYPE: ' + JSON.stringify(byType));
    console.log('BY_SOURCE: ' + JSON.stringify(bySource));
    console.log('AVG_CONFIDENCE: ' + (totalConf / seen.size).toFixed(1));
  " 2>/dev/null
else
  echo "NO_LEARNINGS"
fi
```

Present the stats in a readable table format.

---

## Manual add

The user wants to manually add a learning. Use AskUserQuestion to gather:
1. Type (pattern / pitfall / preference / architecture / tool)
2. A short key (2-5 words, kebab-case)
3. The insight (one sentence)
4. Confidence (1-10)
5. Related files (optional)

Then log it:

```bash
~/.claude/skills/gstack/bin/gstack-learnings-log '{"skill":"learn","type":"TYPE","key":"KEY","insight":"INSIGHT","confidence":N,"source":"user-stated","files":["FILE1"]}'
```