31 - Levels 9 to 10 and Beyond (Expert Architecture Mastery)

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This guide is where you transition from strong builder to expert system designer.

Objective

Operate at expert level across architecture, reliability, performance, and tradeoff clarity.

Required docs

• 21_FULL_STACK_MASTERY_PATH.md
• 22_SPECIALIZATION_TRACKS.md
• 24_MASTERY_SCORING_AND_GATES.md
• 25_INFINITY_MASTERY_LOOP.md
• projects/level-9/README.md
• projects/level-10/README.md

Expert execution run pattern

cd <repo-root>/projects/level-9/01-architecture-decision-log
python project.py --input data/sample_input.txt --output data/output_summary.json
pytest -q
ruff check .
black --check .

Expected output:

... output_summary.json written ...
2 passed
All checks passed!
would reformat 0 files

Architecture decision log pattern (copy/paste)

Use this template for every major design choice:

## ADR-YYYYMMDD-<short-title>
- Context:
- Decision:
- Alternatives considered:
- Tradeoffs accepted:
- Failure modes introduced:
- Mitigations:
- Validation evidence:

Quarterly expert cycle

1. Pick one existing system.
2. Identify one architecture weakness.
3. Redesign with explicit alternatives.
4. Add failure simulation proof.
5. Publish ADR + before/after evidence.

Expert gate (must be true)

1. You can explain multiple valid designs and choose one clearly.
2. You can predict failure points before runtime issues occur.
3. You can maintain system quality while complexity grows.
4. You can justify business and technical tradeoffs in plain language.

Primary Sources

• Python docs
• FastAPI tutorial
• SQLAlchemy tutorial
• Dash tutorial

Optional Resources

• Real Python
• Exercism Python

Next

Next: 32_DAILY_SESSION_SCRIPT.md →