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antigravity-agents: Skill for Claude Code

.agents/skills/semantic-graphing/SKILL.md

semantic-graphing is a skill for Claude Code, Codex from rafaelghif/antigravity-agents. It costs 36 tokens per session (932 once invoked), scanned A, original, MIT.

A repository-analysis skill that maps classes, functions, files, and their dependencies in a large codebase. It can show which code may be affected by a change and trace connections between modules.

In plain words
What is it for?
Use it to scan a repository's structure, calculate the impact of changing a symbol or file, trace dependency paths, and export the resulting graph as JSON.
Why use it?
It reduces blind file searching and helps reveal the impact of changing shared code. This is useful before refactoring core functions or data structures.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is rafaelghif/antigravity-agents's own configuration. It tells Claude Code and Codex how to work on antigravity-agents itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything antigravity-agents configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 scripts/semantic_grapher.py . --pagerank --top-central 5.

not rated 5repo changed 1mo ago A scan 36 tokens original MIT
View source ↗ rafaelghif/antigravity-agents
Reuse

Borrowing it

Nothing to install: this file belongs to rafaelghif/antigravity-agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/rafaelghif/antigravity-agents/main/.agents/skills/semantic-graphing/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/rafaelghif/antigravity-agents

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 semantic-graphing

README.md
[![agentmods](https://agentmods.dev/badge/skills/rafaelghif/antigravity-agents/semantic-graphing/github.svg)](https://agentmods.dev/skills/rafaelghif/antigravity-agents/semantic-graphing)
Your own site
<a href="https://agentmods.dev/skills/rafaelghif/antigravity-agents/semantic-graphing"><img src="https://agentmods.dev/badge/skills/rafaelghif/antigravity-agents/semantic-graphing/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 semantic-graphing

Your own site · 80×15
<a href="https://agentmods.dev/skills/rafaelghif/antigravity-agents/semantic-graphing"><img src="https://agentmods.dev/badge/skills/rafaelghif/antigravity-agents/semantic-graphing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 932 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 $0.00036 $0.00932
Opus 5.5 $0.00014 $0.00373
Sonnet 5.5 $0.00007 $0.00186
Haiku 4.5 $0.00004 $0.00093

Measured 1mo ago against content hash 7a113e53c014, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

semantic-graphing 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 1mo 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.

.agents/skills/semantic-graphing/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Semantic Codebase Graphing & Blast Radius Protocol

Role: Principal Code Intelligence & AST Architecture Specialist.

Overview & Trigger Conditions

Activate this skill when exploring new codebases, planning non-trivial refactors, identifying high-risk Architectural God Nodes, mapping symbol caller graphs, or evaluating the blast radius of API/schema modifications.

Trigger Scenarios & Keywords:

  • Codebase reconnaissance, blast radius calculation, caller dependency trees, God Node identification, AST symbol scanning.
  • Keywords: semantic graph, knowledge graph, blast radius, call graph, dependency tree, ast scan, pagerank.

Core Standards & Invariants

  1. Epistemic Exploration over Blind Grepping:

    • Never blindly inspect large files or dump directories when understanding architecture.
    • Extract the AST symbol dependency graph to identify module boundaries, central hubs, and interface contracts.

  2. Mandatory Blast Radius Calculation:

    • Before modifying or deprecating any shared function, utility, base class, or model, calculate the transitive blast radius: Identify ALL upstream callers that could break.
    • Refactorings with a large blast radius (> 10 dependent files) require an Architecture Decision Record (ADR) and phased rollout.

  3. Architectural God Node & Hub Awareness:

    • Use PageRank centrality to identify core system hubs.
    • High-centrality hub nodes require strict backward compatibility, zero breaking changes, and 100% test coverage.

  4. Targeted Reading & Context Economy:

    • Only read the specific line ranges identified in the semantic graph using view_file slice notation (StartLine / EndLine). Avoid reading irrelevant lines.

Graph Engine Commands (scripts/semantic_grapher.py)

  • Full Codebase AST Scan & Hub Identification: python3 scripts/semantic_grapher.py <dir>
  • Transitive Blast Radius Resolution: python3 scripts/semantic_grapher.py <dir> --blast-radius <Symbol> Performs transitive BFS to detect all direct and indirect upstream dependents of a symbol.
  • PageRank Centrality Ranking: python3 scripts/semantic_grapher.py <dir> --pagerank --top-central 10 Ranks top 10 architectural hub symbols in the repository.
  • BFS Shortest-Path Dependency Tracer: python3 scripts/semantic_grapher.py <dir> --path-find <StartSymbol> <EndSymbol> Traces end-to-end invocation flow between two disparate components.
  • GraphRAG Knowledge Graph Export: python3 scripts/semantic_grapher.py <dir> --json Exports structured JSON graph (nodes and edges) for ingestion.

Read the full file on GitHub · 78 lines

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. 1mo ago Changed 7a113e53c014
  2. 2mo ago Changed 9f9c2381f97b
  3. 2mo ago Changed · +48 lines · +6 tokens per session d044e6f2e04b
  4. 2mo ago Changed · +1 lines 76d05bcfd60e
  5. 2mo ago First seen · 29 lines · 30 tokens per session scan A e0aa158adaa4

Subscribe to this mod's changes

semantic-graphing is a skill published in the GitHub repository rafaelghif/antigravity-agents (5 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 932 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 2026-08-31.

CI and CDDebuggingagentic-workflowai-agentsantigravitymcpmulti-agent-systems
Related

semantic-graphing compared with skills from other repositories

semantic-graphing next to 6 skills from other repositories
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semantic-graphingrafaelghif/antigravity-agentsSkill51mo agoMITA36Claude Code, Codex
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systematic-debuggingmnzralee/claude-multi-agent-architectureSkill81mo agoMITA23Claude Code