ras-commander: Skill for Claude Code

.claude/skills/dss_read_boundary-data/SKILL.md

dss_read_boundary-data is a skill for Claude Code from gpt-cmdr/ras-commander. It costs 156 tokens per session (2,460 once invoked), scanned A, original, MIT.

A reader for HEC-DSS files, a data format used by U.S. Army Corps of Engineers water-software tools to store time series and other engineering data. It extracts boundary-condition data, such as flows or water levels, for use with HEC-RAS models.

In plain words
What is it for?
Use it to inspect DSS catalogs, extract individual time series, or collect all boundary time series for an HEC-RAS project.
Why use it?
It avoids manually searching DSS catalogs and copying time-series values. It also handles the Java setup and supporting HEC software needed to read these files.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions AGENTS.md.

This is gpt-cmdr/ras-commander's own configuration. It tells Claude Code how to work on ras-commander itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ras-commander configures →

Reuse

Borrowing it

Nothing to install: this file belongs to gpt-cmdr/ras-commander. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/gpt-cmdr/ras-commander/main/.claude/skills/dss_read_boundary-data/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/gpt-cmdr/ras-commander

Made for: Claude Code.

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 dss_read_boundary-data

README.md
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Your own site
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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 dss_read_boundary-data

Your own site · 80×15
<a href="https://agentmods.dev/skills/gpt-cmdr/ras-commander/dss_read_boundary-data"><img src="https://agentmods.dev/badge/skills/gpt-cmdr/ras-commander/dss_read_boundary-data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 156 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,460 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 $0.00156 $0.02460
Opus 5 $0.00078 $0.01230
Sonnet 5 $0.00031 $0.00492
Haiku 4.5 $0.00016 $0.00246

Measured 9d ago against content hash 8596f420dc8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

dss_read_boundary-data 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 9d ago.

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.

.claude/skills/dss_read_boundary-data/SKILL.md · 316 lines

How it starts

The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reading DSS Boundary Data

Primary Source Navigator -- Use this skill as a concise entry point to DSS file operations. Read authoritative sources for complete documentation.

Quick Reference

from ras_commander import init_ras_project, RasDss

# Initialize project
ras = init_ras_project("path/to/project", "7.0")

# Read DSS catalog
catalog = RasDss.get_catalog("file.dss")

# Extract single time series
df = RasDss.read_timeseries("file.dss", pathname)

# Extract ALL boundary DSS data (recommended)
enhanced = RasDss.extract_boundary_timeseries(
    ras.boundaries_df,
    ras_object=ras
)

Primary Sources (Read These First)

1. Module Architecture & Developer Guidance

Location: ras_commander/dss/AGENTS.md

Read this for:

  • Lazy loading architecture (no overhead until first use)
  • Three-level lazy loading (package → subpackage → method)
  • Public API reference table
  • DataFrame metadata structure (df.attrs)
  • Dependencies (pyjnius, Java, HEC Monolith)
  • Adding new DSS methods
  • Testing DSS operations
  • Common issues and troubleshooting

Why authoritative: Written by maintainers, updated with code changes, read by developers working on the module.

2. Complete Workflow Example

Location: examples/310_dss_boundary_extraction.ipynb

Read this for:

  • Step-by-step extraction workflow
  • Real project (BaldEagleCrkMulti2D)
  • Catalog reading examples
  • Single time series extraction
  • Batch extraction with extract_boundary_timeseries()
  • Plotting DSS boundary data
  • Exporting results to CSV
  • Accessing extracted DataFrames

Why this is authoritative: Tested with real HEC-RAS projects, serves as functional test, maintained alongside library.

3. Source Code & Docstrings

Location: ras_commander/dss/RasDss.py

Read this for:

  • Complete method signatures
  • Parameter types and defaults
  • Return value structures
  • Error handling patterns
  • Implementation details

Why this is authoritative: Source code is always correct, docstrings updated with each release.

Read the full file on GitHub · 316 lines

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. 9d ago First seen · 316 lines · 156 tokens per session scan A 8596f420dc8d

Subscribe to this mod's changes

dss_read_boundary-data is a skill published in the GitHub repository gpt-cmdr/ras-commander (79 stars, last pushed today), licensed MIT. It adds 156 tokens to every session and 2,460 once invoked, about $0.0008 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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