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graph-tools

Skill0 starsChanged 3 months agoMITView on GitHub

Builds and queries directed graphs from JSON edge lists — node/edge counts, in/out degree stats, cycle detection via DFS coloring, and BFS shortest paths. Dependency chains, call graphs, state machines, and org structures are all edge lists until someone makes them queryable. Stdlib-only, deterministic.

The file

We split this skill into the rules it gives an agent

1 rule. About 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Every dependency chain is an edge list until someone makes it queryable.

    line 14

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Graph Tools

Every dependency chain is an edge list until someone makes it queryable.

Commands

python3 scripts/graph_tools.py deps.json --stats
python3 scripts/graph_tools.py deps.json --path ui database
python3 scripts/graph_tools.py deps.json --fail-on-cycle   # CI: assert DAG

Input

{"edges": [["ui", "api"], ["api", "db"], ["db", "cache"]]}

Reports

  • Node/edge counts, in/out degree per node (--stats)
  • Cycles as readable paths (a -> b -> c -> a), exit 1 when found
  • Shortest path via BFS (--path FROM TO), exit 1 when none
  • --fail-on-cycle for CI gates on pipelines, imports, migrations

Pairs with

gate-graph (module overlap via AST fingerprints — the code-level view; this is the structure-level view), json-diff (compare two graph snapshots).

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