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Claude Code

The Complete Field Guide to Claude Code, AGENTS.md, and Agent Execution Loops

Claude Code represents Anthropic's terminal-native agent paradigm. Unlike traditional chat assistants, Claude Code executes filesystem operations, runs terminal commands, and resolves complex coding problems in loops. Building reliable workflows with Claude Code requires mastering context management, AGENTS.md instruction formatting, and token cost governance.

Core Engineering Pillars

Instruction Architecture & AGENTS.md

Structuring project memory and rules without prompt bloat. Preventing instruction drift across long subagent execution loops.

Context Window & Cost Governance

Strategies for pruning history, managing 200K+ token sessions, and leveraging caching proxies (like pxpipe) to slash API overhead.

Tool Use, MCP & Subagents

Equipping Claude Code with specialized Model Context Protocol tools, custom slash commands, and multi-agent coordination.

  1. 1. Standardize Project Rules

    Set up AGENTS.md / CLAUDE.md guidelines that prevent hallucinations and align coding style.

  2. 2. Master Session Hygiene

    Know when to commit, restart sessions, and prune context before token cost compounds.

  3. 3. Integrate Custom MCP & Skills

    Extend Claude Code beyond basic bash commands with domain-specific tools and external APIs.

Frequently Asked Questions

Why does AGENTS.md compatibility matter for Claude Code?

AGENTS.md has become the de facto open standard across multiple coding agents (Codex, Cursor, OpenCode). Maintaining cross-compatibility ensures your codebase rules work universally without proprietary lock-in.

How do you prevent Claude Code from wasting tokens on large repos?

Use targeted file referencing, modular task splitting, and clear stop conditions rather than asking the agent to inspect the entire workspace unconditionally.

Field Reports & Case Studies

Claude Code Articles (7)