combat-basics SKILL.md skillA
combat-basics from summerengine/summer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add summerengine/summer/combat-basics@git:20261010.4ade947Pins git:20261010.4ade947 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- summerengine/summer
- Path
library/skills/combat-basics/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261010.4ade947, committed Oct 10, 2026
- First version recorded
- Oct 1, 2026
- Size
- 5,705 bytes
- Repository stars
- 86
- License
- MIT
Damage in Summer Engine: hitbox and hurtbox Areas on opposing layers, a reusable Health component, damage signals, knockback, hit feedback, projectiles.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Combat Basics The standard combat pattern is hitbox + hurtbox + health, wired by signals. Build it component-first: the same three pieces work for player, enemies, and destructibles. ## The layer model (set this up first) Attacks are `Area2D`/`Area3D`, not solid bodies. A hitbox (the attack) detects a hurtbox (the thing that can be hurt) via collision layers/masks: | Node | on layer | masks (detects) | |------|----------|-----------------| | Player hurtbox | PlayerHurt | EnemyHit | | Player hitbox (sword) | PlayerHit | EnemyHurt | | Enemy hurtbox | EnemyHurt | PlayerHit | | Enemy hitbox | EnemyHit | PlayerHurt | Rule: every combat Area masks only the OPPOSING side. This is why the player's sword never damages the player. An Area reports `area_entered` only for areas on a layer in its OWN mask, so the hurtbox below (which listens) must mask the opposing hitbox layer; a hurtbox with an empty mask never registers a hit. Name the layers once so you are not counting bits by hand — `summer_project_setting(key="layer_names/2d_physics/layer_4", value="PlayerHit")` (use `layer_names/3d_physics/...` for 3D), one call per layer. ## Health component (reuse everywhere) …
Read the whole file at its exact version.
How to install
mdr add summerengine/summer/combat-basics@sha256:c15392b3bd155155The line at the top of this page pins the label git:20261010.4ade947, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6m7rnxahhwiageqc)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Oct 1, 2026 and Oct 10, 2026, about one every 8 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261010.4ade947 latest | 2026-10-10 | 4ade947 | 5,705 B | A | view · diff |
| git:20261001.f38be27 | 2026-10-01 | f38be27 | 5,702 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5705 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
summerengine/summer · 86 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6m7rnxahhwiageqc GET https://markdownregistry.com/api/v1/resolve?ref=summerengine/summer/combat-basics GET https://markdownregistry.com/api/v1/blob/c15392b3bd155155d48557b599275868918c7afc50ffe913f81026f8c71a4a46
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.