Oops - Mistake Learning System

You are an expert at extracting lessons learned from debugging sessions and storing them for future reference.

When To Use

•User says /oops or "oops"
•User says "save this mistake" or "remember this"
•User says "that was a lesson" or "don't let me do that again"
•After successfully fixing a bug (offer to save)

Inputs

•Recent conversation context (you have full access)
•The mistake that was made
•How it was fixed

Outputs

•Lesson stored in global beads (~/.claude/.beads/)
•Confirmation message with lesson summary

Workflow

1. Analyze Recent Conversation

Look back through the conversation to identify:

•What we were trying to do (the goal)
•What went wrong (the symptom)
•Root cause (why it failed)
•How we fixed it (the solution)
•Tags (technology areas: docker, git, python, networking, etc.)

2. Extract Lesson

Format the lesson as:

code

Title: [Concise description of the mistake and fix]
Tags: [Relevant technology tags]
Description:
- Root cause: [Why it happened]
- Fix: [What solved it]
- Prevention: [How to avoid next time]

3. Create Bead

bash

cd ~/.claude && bd create "Lesson: [title]" \
  -t chore \
  -l lesson,[tag1],[tag2] \
  --description "Root cause: [root cause]

Fix: [fix]

Prevention: [prevention]

Project: [current project name]"

4. Confirm to User

code

Saved lesson: "[title]"
Tags: [tags]

You can query lessons with:
  /lessons [tag]    - Search by tag
  /lessons          - Show recent lessons

Query Lessons (/lessons)

When user says /lessons or /lessons [query]:

bash

# List all lessons
cd ~/.claude && bd list -l lesson --json

# Search by tag
cd ~/.claude && bd list -l lesson,[tag] --json

# Show recent 5
cd ~/.claude && bd list -l lesson --json | jq '.[:5]'

Format output as:

code

Found [N] lessons:
  [id] [date] [title] - Tags: [tags]
  [id] [date] [title] - Tags: [tags]

Examples

Example 1: Docker Networking

code

User: /oops

[Context: We just spent 20 minutes debugging why a container couldn't reach
localhost:8080, and fixed it by using host.docker.internal]

Claude: Analyzing recent conversation...

Extracted lesson:
- Mistake: Used localhost to reach host from Docker container
- Root cause: Container's localhost is its own loopback, not the host
- Fix: Use host.docker.internal (Mac/Windows) or 172.17.0.1 (Linux)

Creating bead...

Saved lesson: "Docker localhost isolation - use host.docker.internal"
Tags: docker, networking, containers

Example 2: Git Workflow

code

User: remember this for next time

[Context: We accidentally committed to main instead of a feature branch]

Claude: Analyzing recent conversation...

Extracted lesson:
- Mistake: Committed directly to main branch
- Root cause: Forgot to create feature branch before starting work
- Fix: git reset HEAD~1, git checkout -b feature/x, git commit
- Prevention: Always run 'git branch' before starting work

Creating bead...

Saved lesson: "Git - always create feature branch before committing"
Tags: git, workflow

Storage Details

•Location: ~/.claude/.beads/ (global, cross-project)
•Format: Beads with label "lesson"
•Type: chore (beads doesn't have a "lesson" type)
•Query: bd list -l lesson in ~/.claude directory

Integration with Other Skills

•Debugger: After fixing a bug, debugger can suggest running /oops
•SessionStart hook: Loads recent lessons into context
•Resume handoff: Includes relevant lessons in context restoration

Keywords

oops, save this mistake, remember this, lesson learned, don't do that again, lessons