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Harness engineering
← Track overview
Phase 00 — Setup & tooling
Phase 01 — LLM I/O foundations
Phase 02 — The agent loop
Phase 03 — Tool engineering
Phase 04 — Context engineering
Phase 05 — Prompt & instruction architecture
Anatomy of a system prompt
Memory files (CLAUDE.md / AGENTS.md)
Steering: tone, refusals & guardrail text
Output styles & response contracts
Few-shot & in-context examples that scale
Prompt versioning & A/B in the harness
Phase 06 — File & code operations
Phase 07 — Shell & sandbox execution
Phase 08 — Permissions & safety gating
Phase 09 — Memory & persistence
Phase 10 — Subagents & orchestration
Phase 11 — Planning & task management
Phase 12 — MCP & extensibility
Phase 13 — Retrieval & codebase understanding
Phase 14 — Reliability engineering
Phase 15 — Evals & testing the harness
Phase 16 — Observability & cost
Phase 17 — Security & alignment
Phase 18 — Production & deployment
Phase 19 — Capstone: build your own coding agent
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Memory files (CLAUDE.md / AGENTS.md)
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Output styles & response contracts
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