What is antigravity-session-management?

Guidance for keeping work coherent across long Google Antigravity sessions, where agents may work asynchronously or across multiple chats.

Use it to review Artifacts, maintain Knowledge Items, decide whether to continue or start a fresh agent, and coordinate multi-agent work.

It helps prevent stale notes, lost decisions, and conflicting handoffs when work continues over time or moves between agents.

antigravity-session-management — Skill by navendubrajesh

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add navendubrajesh/context-management-for-agents --skill antigravity-session-management

Clone the repo

git clone --depth 1 https://github.com/navendubrajesh/context-management-for-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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-session-management/github.svg)](https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-session-management)

Your own site

<a href="https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-session-management"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-session-management/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/navendubrajesh/context-management-for-agents/antigravity-session-management"><img src="https://agentmods.dev/badge/skills/navendubrajesh/context-management-for-agents/antigravity-session-management.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 859 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.

Model	Per session	Once invoked
Fable 5.1	$0.00091	$0.00859
Opus 5.5	$0.00036	$0.00344
Sonnet 5.5	$0.00018	$0.00172
Haiku 4.5	$0.00009	$0.00086

Measured 2mo ago against content hash b8bdf355d572, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

antigravity-session-management 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 2mo 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.

skills/antigravity-session-management/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.

Antigravity Session Management

Antigravity sessions span Editor chats and Manager-orchestrated async agents. Durability comes from Artifacts and Knowledge Items, not verbatim chat. This skill covers keeping long agent-first work coherent across sessions and agent instances.

When to Activate

Activate this skill when:

Manager Surface agents produce Artifacts that need review before the next phase
Knowledge Items contain outdated facts misleading new sessions
Deciding whether to continue an async agent run or spawn a fresh one
Multi-agent workflows produce conflicting Artifacts or plans
Editor sessions lose alignment with Manager-generated plans

Do not activate this skill for adjacent work owned by other skills:

Do not activate for writing AGENTS.md or skills: antigravity-customization.
Do not activate for context pillar overview: antigravity-context-architecture.
Do not activate for CLI-style /compact workflows: copilot-session-management.
Do not activate for platform-agnostic summarization: context-compression.

Core Concepts

Artifacts as session checkpoints

Each significant agent phase should produce a reviewable Artifact (plan, task list, walkthrough). Treat approved Artifacts as checkpoints — the Manager Surface equivalent of compaction summaries, but human-reviewable and editable.

Knowledge Item hygiene

KIs persist indefinitely. Stale KIs cause confident wrong behavior. Schedule KI audits when: APIs change, architecture pivots, or Artifacts supersede earlier assumptions. Delete or update — don't accumulate contradictory KIs.

Manager Surface handoffs

When delegating end-to-end tasks:

Agent generates Artifacts for verification
Human comments on Artifact (not raw tool logs)
Agent continues with feedback incorporated
Approved Artifacts become reference for downstream agents

Fresh agent vs continue

Continue when: Artifact state is current, KIs accurate, and the next task is a logical extension.

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.

2mo ago First seen · 78 lines · 91 tokens per session scan A b8bdf355d572

Subscribe to this mod's changes

antigravity-session-management is a skill published in the GitHub repository navendubrajesh/context-management-for-agents (2 stars, last pushed 1mo ago), licensed MIT. It adds 91 tokens to every session and 859 once invoked, about $0.0004 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.

Memory and context

antigravity-session-management next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
antigravity-session-managementnavendubrajesh/context-management-for-agents	Skill	2	1mo ago	MIT	A	91	Claude Code, Codex
knowledge-ingestopenclaw/openclaw	Skill	394k	yesterday	MIT	A	80	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	68k	2d ago	Apache-2.0	A	217	Claude Code, Codex
forgetasgeirtj/system_prompts_leaks	Skill	71k	2d ago	CC0-1.0	A	74	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	yesterday	MIT	A	184	Claude Code
memoryopensquilla/opensquilla	Skill	7.1k	6d ago	Apache-2.0	A	44	Claude Code, Codex
ha-data-storesshiwenwen/hope-agent	Skill	1.9k	yesterday	MIT	A	115	Claude Code, Codex