Antigravity

Vendor: Antigravity Install name: antigravity Status: Preview Native config: ~/.gemini/GEMINI.md plus ~/.gemini/antigravity-cli/plugins/apothem/

InstallationCopy Anchor Link

apothem install --harness antigravity

The adapter renders the shared profile to ~/.gemini/GEMINI.md and installs Apothem support cohorts as an Antigravity CLI plugin.

Files written: ~/.gemini/GEMINI.md, ~/.gemini/antigravity-cli/plugins/apothem/plugin.json, ~/.gemini/antigravity-cli/plugins/apothem/skills/, ~/.gemini/antigravity-cli/plugins/apothem/rules/, converted local helper definitions inside the plugin, ~/.gemini/antigravity-cli/plugins/apothem/.apothem/support/templates/, and ~/.gemini/antigravity-cli/plugins/apothem/.apothem/support/hooks/.

The Apothem block in ~/.gemini/GEMINI.md ends with an Apothem support files section that names the absolute directory each repository-style citation resolves against: rules/<name>.md under the plugin's rules/, and templates/... and hooks/... under the plugin's .apothem/support/.

Plugin rules. Antigravity discards any file in a plugin's rules/ directory that does not open with a valid trigger (Antigravity rules documentation), so each Apothem rule is converted on install. A rule that always applies gets trigger: always_on; a rule scoped to paths gets trigger: glob with the same patterns in globs; any other rule gets trigger: model_decision. Every rule keeps its description. Five rules always apply: agnostic-posture, authority-inquiry, session-closure, context-management, and the rule index apothem-rule-index, which names every other rule and when to read it. The other rules carry trigger: glob. Antigravity shares a 20,000-token budget across always-on rules and turns the largest into on-demand pointers past it; the five rules come to about 11,000 tokens, so none is turned into a pointer.

Plugin manifest. plugin.json carries only name and description, the two keys Antigravity's plugin schema admits.

Plugin helpers. Helper definitions in the plugin's agents/ directory carry name and description. Antigravity's tools list uses its own tool names, and the docs warn that an unknown name can hang the subagent, so no tool list is emitted and helpers inherit the parent's tools. Because nothing on Antigravity enforces a read-only limit, those helpers' descriptions drop the "read-only" label.

Shared user anchor. ~/.gemini/GEMINI.md is also the user-scope anchor for Gemini-family tooling. The Antigravity adapter keeps its extra Apothem material inside the apothem plugin under ~/.gemini/antigravity-cli/plugins/ so it does not claim generic Gemini CLI project directories. Because more than one tool loads ~/.gemini/GEMINI.md, the Apothem block there is written as global guidance that names no single tool as its reader.

Profile-to-native-config mappingCopy Anchor Link

The adapter reads Apothem's shared profile and renders the instruction anchor plus support cohorts on every apothem install or apothem update run.

Compatibility notesCopy Anchor Link

Preview adapter. The GEMINI.md anchor is active instruction content; the Antigravity plugin preserves converted command skills, reusable skills, local helper definitions, rules, templates, and hook support material in a clear Apothem-owned namespace. Hook files are not registered as active Antigravity hook events until the adapter owns a schema translation layer for Antigravity hooks.json.

VerificationCopy Anchor Link

apothem verify --harness antigravity

The verify command confirms that:

1. The native context file exists at the expected path.
2. The plugin manifest plugin.json exists, is non-empty, and parses as JSON. Verify does not check the plugin name; inspect that field yourself after changing it.

UpdatingCopy Anchor Link

apothem update --harness antigravity

Re-derives the native config from the current shared profile state. Run after editing ~/.config/apothem/profile.yaml or upgrading the installed Apothem package.

UninstallingCopy Anchor Link

apothem uninstall --harness antigravity

Removes the Apothem block from ~/.gemini/GEMINI.md and keeps any other text in it. The file is deleted only when nothing else remains in it. Also removes Apothem's keys from plugin.json in the plugin folder ~/.gemini/antigravity-cli/plugins/apothem/ and keeps yours, and removes the Apothem files in that folder's skills/, rules/, agents/, and .apothem/support/ subfolders; other files there stay. Each file is backed up under ~/.apothem/backups/ before it is changed or removed. The shared profile YAML and Apothem engine are unaffected.

Conformity gateCopy Anchor Link

python -m apothem.conformity.gate --all .

TroubleshootingCopy Anchor Link

Configuration knobsCopy Anchor Link

See alsoCopy Anchor Link

• All harnesses — the full catalog of supported tools
• Install guide — install Apothem into this harness
• apothem harnesses reference — list and inspect adapters from the CLI