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Grasscutters/Grasscutter

A server software reimplementation for a certain anime game.

Mixed

Slowing — last commit 6mo ago

ConcernsDependency

copyleft license (AGPL-3.0) — review compatibility; dependency CVE scan unavailable

HealthyFork & modify

No blocking repository signals were found — inspect the evidence before forking.

HealthyLearn from

Documented and popular — useful reference codebase to read through.

MixedDeploy as-is

Scorecard "Branch-Protection" is 0/10; dependency CVE scan unavailable

  • ⚠Slowing — last commit 6mo ago
  • ⚠AGPL-3.0 is copyleft — check downstream compatibility
  • ⚠Scorecard: default branch unprotected (0/10)
  • ✓Last commit 6mo ago
  • ✓23+ active contributors
  • ✓Distributed ownership (top contributor 30% of recent commits)
  • ✓AGPL-3.0 licensed
  • ✓CI configured
  • ✓Tests present

What would improve this?

  • •Use as dependency Concerns to Mixed if: relicense under MIT/Apache-2.0 (rare for established libs)

Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against OpenSSF Scorecard

Informational only. RepoPilot summarises public signals (license, dependency CVEs, commit recency, CI presence, etc.) at the time of analysis. Signals can be incomplete or stale. Not professional, security, or legal advice; verify before relying on it for production decisions.

Repository brief

Repo brief: Grasscutters/Grasscutter

Generated by RepoPilot · document generated 2026-09-16 · concise human review Evidence snapshot · analyzed 2026-09-16T08:53:15.522Z · commit f373827a83d3

Verdict

Mixed — Slowing — last commit 6mo ago

  • Last commit 6mo ago
  • 23+ active contributors
  • Distributed ownership (top contributor 30% of recent commits)
  • AGPL-3.0 licensed
  • 2 more receipts on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against OpenSSF Scorecard

What it is

Grasscutter is a server-side reimplementation for a specific anime game (Genshin Impact) written in Java. It replaces the official game server, enabling players to run private servers with features like combat, gacha, co-op gameplay, inventory management, and character progression. The project uses Protocol Buffers (evidenced by 1000+ generated proto classes in src/generated/main/java/emu/grasscutter/net/proto/) for network communication. Monolithic Java application with generated Protocol Buffer classes under src/generated/main/java/emu/grasscutter/net/proto/ (1000+ auto-generated message classes like ACCKLIOPBHNOuterClass.java). Source code follows package structure…

Start here

Open these first:

  • src/generated/main/java/emu/grasscutter/net/proto — Protocol buffer generated message classes that define all network communication contracts between client and server.
  • lib/kcp-1.5.1.jar — KCP protocol implementation JAR providing UDP-based reliable transport layer for game networking.
  • lib/bcrypt-0.8.0.jar — Password hashing library critical for secure credential storage and authentication.
  • lib/bytes-1.3.0.jar — Byte manipulation utility library used throughout network packet serialization and deserialization.

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

No Gradle or Maven manifest (pom.xml, build.gradle) visible in the provided file list. Clone with: git clone https://github.com/Grasscutters/Grasscutter.git. Based on the README, prerequisites are Java 17 and MongoDB…

Daily commands:

Cannot be determined from provided data. No Makefile, no gradle/maven manifest, and README setup section is incomplete (ends with 'Dependencies/Config snippet:'). Verify build.yml in .github/workflows/ or README.md dire…

…shortened for this brief.

Key cautions & unknowns

  • Slowing — last commit 6mo ago
  • AGPL-3.0 is copyleft — check downstream compatibility
  • Scorecard: default branch unprotected (0/10)
  • MongoDB must be running separately (not embedded)—the README mentions MongoDB Community Server as a prerequisite but provides no connection configuration details visible here. Java 17 is explicitly required (not 11 or…
  • Published-advisory coverage was unavailable for the captured dependencies.
  • Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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