graphjin: Skill for Claude Code

GraphJin environment workflows (in this repo)

For working on GraphJin. Someone using a published environment wants the graphjin-env skill instead, and the public documentation is at https://graphjin.com/environment/.

Which loop are you in

Goal	Entry point
Measure: does the agent still work	graphjin eval create → eval run / eval baseline
Collect: build a training corpus	graphjin eval sample → eval export
Serve: give a training loop an environment	graphjin env serve
Mint: get a world that is not the demo	graphjin env new-world / env clone

They share one engine. A change to scoring, task semantics or provenance affects all four.

Gates

Run the ones your change touches, not just the fast one.

go build -o /dev/null ./cmd/ && go vet ./cmd/
go test ./cmd/ ./agent/... -count=1          # ~2 minutes
cd website && npm run build && npm run check  # required for any website/** change
make env-image-smoke                          # skips cleanly without docker or ko

npm run check is the gate, not hugo. It validates every internal link and anchor, pins load-bearing copy, and derives several assertions from Go source — so a docs change can fail on a code file and vice versa.

Never hand-edit

• eval/suite.yml, eval/suite.split.json, eval/authored.yml — use eval add / eval rm, which go through the validated writer. Task ids are content hashes; editing a prompt detaches the task from every stored episode.
• website/data/benchmarks/<slug>.yaml and website/content/benchmarks/<slug>/runs/ — graphjin eval publish is the only sanctioned writer.
• Anything under .graphjin-evals/.

Contracts that move fingerprints

Know before you edit, because these invalidate comparisons rather than break builds:

• agent/skills.go — any string moves PromptRegistryHash(), which is recorded in run provenance. Every baseline comparison across that edit is invalid whether or not behaviour changed.
• Skill payload budgets are test literals in agent/skills_test.go, and they ratchet both ways. A guide gated behind a gj_* root costs an ordinary caller nothing; universal guidance costs every caller. Bump a budget visibly in the diff rather than routing prose through an uncounted channel.
• eval.GeneratorVersion — bump when generated task semantics change, and append the previous literal to SupportedGeneratorVersions.
• RewardVersion — bump on any scoring change. Runs either side are not comparable.
• suiteIdentityProjection — a new field changes every existing run's identity unless it is omitempty at its zero value.