Adajoon Skill Improvement

Iterative Refinement Process

1. Capture Deviations

When reviewing code or fixing bugs, document deviations from skills:

## Deviation Log

**Date**: 2026-04-04
**Skill**: adajoon-security
**Deviation**: API key stored in code instead of environment variable
**Location**: `backend/app/services/external_api.py:15`
**Impact**: Critical - exposed in git history
**Root Cause**: Skill didn't emphasize scanning for hardcoded secrets
**Fix**: Added pre-commit hook + updated skill section on secrets detection

Template location: .cursor/skills/adajoon-skill-improvement/logs/deviations.md

2. Track Pattern Effectiveness

Document which patterns work vs fail in practice:

## Pattern Effectiveness Log

**Pattern**: "Use async/await for all database operations"
**Skill**: adajoon-conventions
**Status**: ✅ WORKING
**Evidence**: Zero sync DB calls in last 50 PRs
**Notes**: Clear examples in skill make this obvious

---

**Pattern**: "Only comment non-obvious intent"
**Skill**: adajoon-conventions
**Status**: ⚠️ NEEDS CLARITY
**Evidence**: 3 PRs this week had obvious comments flagged
**Notes**: Add more examples of what counts as "obvious"

Template location: .cursor/skills/adajoon-skill-improvement/logs/patterns.md

3. Code Review Feedback Loop

During code reviews, systematically check:

Checklist:

• Which skills were violated?
• Was the violation skill content missing or unclear?
• Could better examples prevent this?
• Is this a new pattern to document?
• Should we add a validation script?

Quick log:

# In PR comments, tag skill issues with:
[SKILL:adajoon-conventions] Use f-strings instead of .format()
[SKILL:adajoon-security] Missing input validation on user_id parameter
[SKILL:NEW] Consider documenting this React context pattern

Learning by Doing

Document Mistakes and Fixes

After fixing any bug, create a learning entry:

## Learning Entry #042

**Date**: 2026-04-04
**Category**: Database
**Mistake**: Missing database transaction caused partial updates
**What Happened**: User profile updated but related preferences failed
**Why It Happened**: Transaction not wrapped properly in async context
**The Fix**:
\`\`\`python
async with db.begin():
    await db.execute(update_user)
    await db.execute(update_preferences)
\`\`\`
**Skill Update**: Added transaction patterns to adajoon-database skill
**Prevention**: Added example of multi-table updates requiring transactions

Template location: .cursor/skills/adajoon-skill-improvement/learnings/YYYY-MM-DD-issue-number.md

Test Assumptions

Before adding new patterns to skills, validate them:

## Assumption Test

**Hypothesis**: Using SELECT FOR UPDATE improves concurrent vote handling
**Test Plan**: 
1. Add FOR UPDATE to vote queries
2. Run concurrent vote test (100 simultaneous votes)
3. Measure deadlocks, race conditions, performance

**Results**:
- Deadlocks: 0 (was 12 without FOR UPDATE)
- Race conditions: 0 (was 5 without)
- Performance: +15ms per query (acceptable trade-off)

**Conclusion**: ✅ Add to adajoon-database skill
**Added**: Section "Concurrent Updates" with SELECT FOR UPDATE pattern

Self-Review Process

Before Committing Code

Run through skill checklist:

# Create pre-commit mental checklist
echo "Running skill self-review..."

# For Python changes:
- [ ] Type hints on all functions? (adajoon-conventions)
- [ ] Using async/await? (adajoon-conventions)
- [ ] Imports organized? (adajoon-conventions)
- [ ] No secrets in code? (adajoon-security)
- [ ] Input validation? (adajoon-security)
- [ ] Database transactions? (adajoon-database)

# For JavaScript changes:
- [ ] const/let (no var)? (adajoon-conventions)
- [ ] Arrow functions? (adajoon-conventions)
- [ ] Async/await not .then()? (adajoon-conventions)
- [ ] XSS prevention? (adajoon-security)
- [ ] CSRF token included? (adajoon-security)

# For deployment:
- [ ] Environment variables set? (adajoon-deployment)
- [ ] Database migrations? (adajoon-database)
- [ ] Health checks work? (adajoon-deployment)

After Deployment

Within 48 hours of deployment, review:

## Post-Deployment Review

**Deployment**: v1.2.3 (2026-04-04)
**Changes**: Added channel health filtering

**Questions**:
1. Did it work as expected? ✅ Yes
2. Any unexpected issues? ⚠️ Slow query on large datasets
3. User feedback? ✅ Positive
4. Skills followed? ⚠️ Missing index on health_status column
5. Skill gaps discovered? Yes - need query optimization section

**Actions**:
- [ ] Add index to health_status column
- [ ] Update adajoon-database with index strategy for enum columns
- [ ] Document N+1 query prevention pattern

Weekly Pattern Review

Every Friday, review the week:

## Weekly Review: 2026-04-04

**Code Written**: 15 files changed, 847 additions
**PRs Merged**: 7

**Patterns Observed**:
- ✅ Excellent: Type hints used consistently (100%)
- ✅ Good: Async/await usage (95%)
- ⚠️ Needs work: Test coverage on edge cases (60%)
- ❌ Problem: 3 instances of missing input validation

**Skill Violations**:
- adajoon-security: 3x missing validation (channels.py, auth.py, votes.py)
- adajoon-conventions: 2x obvious comments
- adajoon-database: 1x missing transaction

**Next Week Focus**:
1. Add input validation examples to adajoon-security
2. Review all endpoint handlers for validation
3. Create validation helper functions

**Skill Updates Made**: 
- Updated adajoon-security with validation patterns
- Added comment anti-patterns to adajoon-conventions

Monthly Meta-Analysis

First of each month, analyze trends:

## Monthly Skill Audit: March 2026

**Stats**:
- Total commits: 134
- Skill violations: 18 (13% of commits)
- Bugs found: 7
- Skills updated: 4

**Which skills are most violated?**
1. adajoon-security (8 violations) - Input validation unclear
2. adajoon-conventions (6 violations) - Comment guidelines vague
3. adajoon-database (4 violations) - Transaction patterns missing

**Which skills prevent most bugs?**
1. adajoon-security (prevented 12 potential vulnerabilities)
2. adajoon-database (prevented 5 data integrity issues)
3. adajoon-conventions (prevented 3 type errors)

**Which skills need clarification?**
- adajoon-security: Add comprehensive input validation section
- adajoon-conventions: More comment anti-pattern examples

**What's missing from our skills?**
- Error handling patterns (create adajoon-error-handling skill?)
- Testing strategies (create adajoon-testing skill?)
- Performance optimization (add to existing skills?)

**Actions**:
- [ ] Expand adajoon-security validation section
- [ ] Add 10 more comment examples to adajoon-conventions
- [ ] Research need for error-handling skill

Feedback Loops

Code Review → Skill Updates

Process:

1. Reviewer spots pattern violation
2. Check if skill covers this
3. If missing: Add to skill immediately
4. If unclear: Clarify with example
5. If outdated: Update with new pattern

Example workflow:

# PR Comment
Found SQL injection vulnerability in search endpoint.

[Action]:
1. ✅ Fix the code in this PR
2. ✅ Check adajoon-security skill - has SQL injection section but no FastAPI examples
3. ✅ Add FastAPI parameterized query example
4. ✅ Update skill version to v1.3
5. ✅ Notify team of skill update

Bug Fixes → Pattern Documentation

Process:

1. Bug discovered
2. Root cause analysis
3. Fix implemented
4. Pattern documented in skill
5. Prevention mechanism added

Template:

## Bug → Skill Update

**Bug**: Race condition in concurrent vote handling
**Root Cause**: Missing database-level locking
**Fix**: Added SELECT FOR UPDATE
**Skill Updated**: adajoon-database
**Section**: "Concurrent Updates"
**Prevention**: Added to code review checklist
**Validation**: Created integration test for concurrent operations

Performance Issues → Best Practices

Process:

1. Performance issue identified
2. Profile and measure
3. Optimization implemented
4. Pattern added to skill
5. Benchmark documented

Example:

## Performance → Skill Update

**Issue**: Channel listing taking 2.5s with 10k channels
**Root Cause**: N+1 query loading categories
**Fix**: Added joinedload for eager loading
**Measurement**: Reduced to 150ms (94% improvement)
**Skill Updated**: adajoon-database v1.4
**Section**: Added "Query Optimization" with joinedload examples
**Rule Added**: Always use joinedload for known relationships

Security Incidents → Immediate Updates

Process (highest priority):

1. Incident detected
2. Immediate fix deployed
3. Skill updated within 24 hours
4. Team notified of update
5. Audit codebase for similar issues

Template:

## SECURITY INCIDENT → SKILL UPDATE

**Incident**: API key exposed in client-side code
**Severity**: CRITICAL
**Impact**: Potential unauthorized access
**Immediate Fix**: Rotated keys, moved to server-side only
**Skill Updated**: adajoon-security v2.0 (MAJOR)
**Changes**:
- Added "Never expose API keys in frontend" rule
- Added pre-commit hook to scan for common key patterns
- Added checklist item: "Verify no secrets in frontend bundle"
**Audit**: Scanned entire codebase - found 2 more instances, fixed
**Prevention**: Added .env.example with dummy values
**Team Notified**: 2026-04-04 via Slack + email

Skill Evolution

Versioning Skills

Use semantic versioning for skills:

Format: vMAJOR.MINOR.PATCH

• MAJOR: Breaking change (old pattern deprecated, incompatible)
• MINOR: New pattern added (backward compatible)
• PATCH: Clarification, typo, example improvement

Version header (add to skill file):

---