hayba-water-crossing

hayba-water-crossing is a skill for Claude Code, Codex from zajalist/hayba. It costs 32 tokens per session (420 once invoked), scanned A, original, MIT.

An Unreal Engine workflow for creating or checking one river or lake crossing beside a playable route. It covers the water setup, banks, clearance, coverage, and basic physics checks.

In plain words
What is it for?
Use it to create or adjust a river, inspect existing water bodies and zones, validate coverage and waves, and check the crossing in the editor or during play.
Why use it?
It prevents a crossing from looking correct while lacking the required Unreal Water setup or usable route. It also stops work when the required Water plugin or classes are unavailable.

Skill for Claude CodeCodex

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

Good fit Use it to create or adjust a river, inspect existing water bodies and zones, validate coverage and waves, and check the crossing in the editor or during play.

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Install with agentmods
npx agentmods add skills/zajalist/hayba/hayba-water-crossing
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 zajalist/hayba --skill hayba-water-crossing
Clone the repo
git clone --depth 1 https://github.com/zajalist/hayba

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 hayba-water-crossing

README.md
[![agentmods](https://agentmods.dev/badge/skills/zajalist/hayba/hayba-water-crossing/github.svg)](https://agentmods.dev/skills/zajalist/hayba/hayba-water-crossing)
Your own site
<a href="https://agentmods.dev/skills/zajalist/hayba/hayba-water-crossing"><img src="https://agentmods.dev/badge/skills/zajalist/hayba/hayba-water-crossing/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 hayba-water-crossing

Your own site · 80×15
<a href="https://agentmods.dev/skills/zajalist/hayba/hayba-water-crossing"><img src="https://agentmods.dev/badge/skills/zajalist/hayba/hayba-water-crossing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 420 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.
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 $0.00032 $0.00420
Opus 5.5 $0.00013 $0.00168
Sonnet 5.5 $0.00006 $0.00084
Haiku 4.5 $0.00003 $0.00042

Measured 13d ago against content hash e576be56f466, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hayba-water-crossing 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 13d 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.

mcp-tools/hayba-mcp/addons/workflows/hayba-water-crossing/SKILL.md · 25 lines

What it actually says

Build one water crossing

When to use

Use for one crossing where water shape, bank height, bridge or ford clearance, and player route are defined. Record target width, depth impression, landscape interaction, and platform budget. Decide whether a visual-only water body is sufficient before adding waves or complex geometry.

Tool routing

  • Call water_check_plugin first. If Water is disabled or its classes are absent, stop and report the prerequisite; do not fabricate a body with a generic actor spawn. Read water_body_list and water_body_inspect for existing bodies and water_zone_inspect for coverage.
  • For a new river, use get_tool_signature and the dry-run path of water_body_river_create before spawning. Inspect its spline-applied flag and warnings; a spawned actor with unapplied spline points is not a river matching the route. Add or adjust a Water Zone with water_zone_create only when needed and verify its bounds.
  • Run water_validate for missing zones, bodies outside coverage, and wave configuration. Inspect the body again, capture the banks with editor_capture_viewport, and use scene_validate_physics for placement conflicts. A representative PIE traversal or manual playtest must confirm collision and crossing readability; water validation alone cannot.
  • After accepting a persistent water body or zone, save the exact active map with level_save, inspect saved, dirty, and verified status, then re-read water_body_inspect and water_zone_inspect. If persistence is uncertain, mark the crossing unsaved and route it to hayba-world-save-integrity.

Evidence

Report plugin status, body and zone identities, intended versus observed spline points and bounds, validation findings, crossing view, traversal observation, and warnings. Treat deferred per-point river width, depth, or velocity metadata as unresolved rather than assuming the requested values applied.

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. 13d ago First seen · 25 lines · 32 tokens per session scan A e576be56f466

Subscribe to this mod's changes

hayba-water-crossing is a skill published in the GitHub repository zajalist/hayba (13 stars, last pushed 3d ago), licensed MIT. It adds 32 tokens to every session and 420 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-04.

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