Integrations

EGC for Antigravity

Give Antigravity the same persistent memory, guardrails and context as 18 other AI coding tools. One local install, encrypted on your machine, nothing sent to a cloud.

Core-supported

The maintainer or an area steward runs it daily; a regression caused by a vendor change is fixed before the next release. How support levels work.

Install

One command sets up the engine for Antigravity and every other tool it detects. Then run egc init once in each project you want EGC to manage.

npm install -g @egchq/egc && egc install
cd your-project && egc init

The prompt library (agents, skills, commands and rules) is optional and off by default. Add it to every detected tool with egc install --prompt-library, or to Antigravity alone with egc install --target antigravity --profile full.

What Antigravity gets

Memory

Decisions, session context, working memory and lessons captured in Antigravity are available in every other tool you open, and the other way around. Encrypted at rest, kept per project and branch, never committed.

Session Mesh

Open sessions announce themselves, claim the files they edit and exchange events on a local bus. Hooks at .agents/hooks.json (project) and ~/.gemini/antigravity-cli/hooks.json (global).

Guardian

Command validation and write gating by egc-guardian: through its MCP tools where they are registered, and through the tool's own hooks where it has them. Guardian hooks (GateGuard) registered per project.

Token Crusher

Shell output is compressed before it reaches the model, with every error and warning kept and a local ledger of what it saved. Where the tool has no hook that rewrites commands, the PATH-level shim (egc crusher-shim) covers git, npm, gh and the rest.

Where EGC installs

Target id	antigravity
Files	Skills, agents, rules and commands under .agents/ in each project; the home install under ~/.gemini through the egc target.
MCP servers	Registered by egc init and the installers.

The full map of how each tool integrates lives in the integration tiers spec.