SWMM Anywhere
Synthesizes a runnable SWMM stormwater network from OSM+DEM when you have no real pipe data.
Test report
- Verdict
- Tested · Works
- Score
- Tested
- Jul 15, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Jul 18, 2026 · b99246f
Actually ran it end-to-end on a real 1x1km London Greenwich bbox: it downloaded live OSM/DEM data and produced a real SWMM .inp with exactly 33 outfalls -- matching the SKILL.md's documented spike-test number to the digit -- and independently confirmed the doc's claimed Apple-Silicon pyswmm SIGKILL bug (exit code 137 on direct import) while the skill's own stub avoided it.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 5/5
- Triggers reliably 5/5
- Output vs. baseline 10/10
- Docs & honesty 5/5
What SWMM Anywhere does
Given only a bounding box, downloads public OpenStreetMap streets and DEM elevation data and runs the upstream SWMManywhere graph pipeline to infer a plausible SWMM 5.2 drainage network (manholes, pipes, outfalls), with a SHA-256-verified raw-data snapshot for auditability. Triggers only when the user has no real pipe shapefile/CAD/GIS data yet, or wants a baseline model before survey data arrives; explicitly defers to swmm-network/swmm-gis when real pipe data exists.
How to install SWMM Anywhere
git clone https://github.com/Zhonghao1995/agentic-swmm-workflow
mkdir -p ~/.claude/skills
cp -r agentic-swmm-workflow/skills/swmm-anywhere ~/.claude/skills/swmm-anywhere
pip install aiswmm[anywhere]
Skills live in ~/.claude/skills/ (global) or .claude/skills/
(per-project). Restart Claude Code after installing.
Commands — how to trigger SWMM Anywhere
-
/swmm-anywhereSynthesizes a runnable SWMM stormwater network from OSM+DEM when you have no real pipe data.
It also activates on plain-language prompts like these:
-
I have no pipe data yet, build me a baseline SWMM model from OSM data -
Generate a stormwater drainage network for this bounding box from DEM -
Create a plausible manhole and pipe layout before our survey data arrives
Frequently asked questions
- Is the SWMM Anywhere skill free?
- Yes. The skill itself is free from Zhonghao1995/agentic-swmm-workflow. SkillProof publishes the install command and an independent test verdict at no cost.
- Does SWMM Anywhere work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 15, 2026. Verdict: Tested · Works. Actually ran it end-to-end on a real 1x1km London Greenwich bbox: it downloaded live OSM/DEM data and produced a real SWMM .inp with exactly 33 outfalls -- matching the SKILL.md's documented spike-test number to the digit -- and independently confirmed the doc's claimed Apple-Silicon pyswmm SIGKILL bug (exit code 137 on direct import) while the skill's own stub avoided it.
- What is the SWMM Anywhere SkillProof Score?
- 10.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 10/10, docs & honesty 5/5.
- How do I install SWMM Anywhere?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use SWMM Anywhere with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.