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lorenliu13lorenliu13/claude-code-for-hydrology/CLAUDE.md

claude-code-for-hydrology

CLAUDE.md67 starsChanged 6 months agoMITView on GitHub

Structured exercises for learning Claude Code best practices, using hydrology-themed Python code. Each numbered folder is a self-contained exercise. Read the folder's README.md before starting. Use python3 on systems where python defaults to Python 2.

The file

We split this CLAUDE.md into the rules it gives an agent

3 rules. About 0 are common, 2 are distinctive, and 1 is very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈2

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 1

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Use python3 on systems where python defaults to Python 2.

    line 12
  2. Distinctive:

    Read the README.md in the exercise folder

    line 30
  3. Distinctive:

    All exercises use hydrology/water science Python code (streamflow, drought indices, model metrics)

    line 37

≈ “Common” is an estimate: at least 1 in 5 of the 26,980 CLAUDE.md files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
CLAUDE.md

Claude Code Best Practices — Learning Project

Structured exercises for learning Claude Code best practices, using hydrology-themed Python code. Each numbered folder is a self-contained exercise. Read the folder's README.md before starting.

Python Environment

python -m pytest <exercise_folder>/ -v

Use python3 on systems where python defaults to Python 2.

Exercise Index

FolderBest Practice
01_explore_plan_code/Explore → Plan → Code with plan mode
02_specific_context/Reference specific files and symptoms in prompts
03_verify_your_work/Give Claude tests so it can verify its own output
04_init_claude_md/Use /init to create CLAUDE.md for persistent project context
05_skills/Create and use skills for domain knowledge (/hydro-context) and repeatable workflows (/flow-report)
06_subagent_review/Orchestrate coder and reviewer subagents in sequence; parent controls context isolation and loops until review passes
07_aws_cli_workflow/Use AWS CLI with Claude to download public hydrological datasets
08_mcp_usgs_gauge/Use MCP fetch server to query the USGS NWIS API and implement correct parsing code
09_parallel_fanout/Spawn subagents in parallel for multi-configuration analysis; aggregate with a reporter subagent

Workflow for Each Exercise

  1. Read the README.md in the exercise folder
  2. Try the "before" prompt — observe what Claude produces
  3. Clear context with /clear
  4. Try the "after" prompt — compare the results

Notes

  • All exercises use hydrology/water science Python code (streamflow, drought indices, model metrics)
  • The .claude/ folder contains a pre-built skill (/run-tests) and a subagent (code-reviewer) to examine as examples

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