swmm-climate

swmm-climate is a skill for Claude Code, Codex from Zhonghao1995/agentic-swmm-workflow. It costs 48 tokens per session (2,026 once invoked), scanned A, original, MIT.

A rainfall-data formatter for EPA SWMM, a program that models stormwater systems. It converts timestamped rainfall CSV files into SWMM input text and an audit record.

In plain words
What is it for?
Use it to turn rainfall measurements into SWMM [TIMESERIES] and [RAINGAGES] sections, handle multiple stations, process batches, and document the conversion.
Why use it?
It removes manual conversion work and makes rainfall inputs consistent, including supported unit conversions and selected time windows.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to turn rainfall measurements into SWMM [TIMESERIES] and [RAINGAGES] sections, handle multiple stations, process batches, and document the conversion.

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Install with agentmods
npx agentmods add skills/zhonghao1995/agentic-swmm-workflow/swmm-climate
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Zhonghao1995/agentic-swmm-workflow --skill swmm-climate
Clone the repo
git clone --depth 1 https://github.com/Zhonghao1995/agentic-swmm-workflow

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for swmm-climate

README.md
[![agentmods](https://agentmods.dev/badge/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate/github.svg)](https://agentmods.dev/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate)
Your own site
<a href="https://agentmods.dev/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate"><img src="https://agentmods.dev/badge/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for swmm-climate

Your own site · 80×15
<a href="https://agentmods.dev/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate"><img src="https://agentmods.dev/badge/skills/zhonghao1995/agentic-swmm-workflow/swmm-climate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,026 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.02026
Opus 5 $0.00024 $0.01013
Sonnet 5 $0.00010 $0.00405
Haiku 4.5 $0.00005 $0.00203

Measured 11d ago against content hash 83055a5867d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

swmm-climate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/build_raingage_section.py, scripts/design_storm.py, scripts/format_rainfall.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/swmm-climate/SKILL.md · 197 lines

How it starts

The opening of the file, as written. The whole thing — 197 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SWMM Climate (MVP rainfall layer)

Part of Agentic SWMM — install the project first for the executable toolchain (aiswmm CLI, SWMM solver, MCP servers).

What this skill provides

  • Deterministic conversion from simple rainfall CSV to:
    • SWMM [TIMESERIES] text lines
    • structured JSON manifest for audit/provenance
  • Deterministic helper generation for SWMM [RAINGAGES] section.
  • MCP wrapper for agentic use.

Input CSV contract

format_rainfall.py expects a header row and at minimum:

  • timestamp: date-time string, default format %Y-%m-%d %H:%M
  • rainfall_mm_per_hr: rainfall intensity in mm/hr

Optional extensions:

  • station_id (or another column via --station-column) to carry multiple stations in one file.
  • Batch mode by repeating --input and/or using --input-glob.
  • Event window slicing via --window-start and --window-end (inclusive).

Accepted rainfall units (--value-units):

  • mm_per_hr (aliases: mm/hr, mm/h)
  • in_per_hr (aliases: in/hr, in/h)

Unit policy (--unit-policy):

  • strict: only mm_per_hr accepted.
  • convert_to_mm_per_hr: supported units are converted to mm_per_hr.

SWMM .dat input contract

For SWMM-native rainfall .dat files (e.g. <series> YYYY M D HH MM value), use --input-dat <path> and declare row units via --dat-value-units:

  • mm_per_hr, in_per_hr (intensities)
  • mm_per_day, in_per_day (24h volumes; divided by 24 to mm/hr)

In .dat mode the --window-start / --window-end filters expect %Y-%m-%d. Use --default-station-id to override the series token taken from the .dat row. --input-dat may be repeated to batch multiple .dat files but cannot be mixed with --input / --input-glob.

Via the MCP tool, pass inputDatPaths: [<path>] and datValueUnits: "mm_per_day" (or another supported unit) instead of inputCsvPath.

Temporal validation:

  • duplicate timestamps are rejected per station/series.
  • timestamp monotonicity is checked per station (--timestamp-policy strict default; optional sort).

Read the full file on GitHub · 197 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 197 lines · 48 tokens per session scan A 83055a5867d4

Subscribe to this mod's changes

swmm-climate is a skill published in the GitHub repository Zhonghao1995/agentic-swmm-workflow (27 stars, last pushed 4d ago), licensed MIT. It adds 48 tokens to every session and 2,026 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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