Geometer 0.1.0-alpha.2

Geometer 0.1.0-alpha.2

Released 30 October 2026. The second public alpha. Free to download, no account, no telemetry.

What's new since 0.1.0-alpha.1

• More agents it can check. Geometer now watches the tools of agents written with the
  OpenAI Agents SDK, Mastra, LangGraph and LangChain, Pydantic AI, CrewAI, Strands Agents,
  Google ADK, LlamaIndex, smolagents, Agno, Microsoft Agent Framework, Microsoft AutoGen,
  Haystack, the Vercel AI SDK, Temporal and the Claude Agent SDK (TypeScript and Python), in
  Python and in Node. The Works with page says, for each
  one, whether it is Supported, Supported with limits, Partial or Not yet, and what is missing.
  Java, .NET and Go frameworks are Not yet. The stand-in for your agent's model now also speaks
  Claude's and Amazon Bedrock's formats; Google Gemini is Partial.
• Put Geometer in front of your MCP servers. geo mcp wrap shows a preview and then adds
  a small relay in front of each server in your MCP configuration; geo mcp unwrap puts the
  file back exactly. geo mcp try runs your own agent against a simulated service with a lost
  reply or a crash and says which rules held. A try can be kept as a check that geo ci
  replays. Or run npx @geometer/init in your project folder: it finds or installs geo,
  offers Docker set-up, shows the wrap and asks before writing.
• Simulated services for more kinds of work. Ready-made stand-ins for Stripe and Adyen
  (payments), Shopify, Zendesk and Intercom (commerce and support), and Salesforce, HubSpot and
  NetSuite (CRM and ERP). They are simulations modelled on each provider's public documentation,
  never the real services, and they cover only part of what each provider offers.
• Learn a stand-in from your own service. geo mcp record keeps a redacted record of a
  session on your computer, after it asks, and geo mcp twin turns it into a simulated copy
  that geo mcp try and geo check can use. A call the recording never showed is answered
  "not simulated", and the check says it could not tell.
• Use it from your coding assistant. geo mcp serve lets Claude Code or Cursor run a
  check, explain a problem and check your fix. Keeping the check always needs your OK in
  Geometer.
• Docker set up where you are. If Docker is missing or stopped, the terminal, the
  installer and the workspace's Docker card show the exact commands and ask first, and your
  coding assistant passes on a link to that card.
  geo doctor --fix does it without running a check. Scripts and CI are never asked: they get
  one message and exit code 3.
• Honest results. A check whose agent fails at start, or never calls a tool, now says
  "Couldn't run" or "Couldn't tell" (exit code 3, no certificate) instead of a clean result,
  and a project's own test command that cannot run in the sandbox is not counted as a problem.
• A calmer workspace. The board brings the old Overview, Explore and Authority screens
  together next to Guard and Prove, in plainer words; "Check my fix" works after you edit the
  code in place; geo practice sets up a practice project (with a games version), and there is an agent
  checklist page. The Mac app now carries the geo command and offers to add it to your
  terminal (it asks first and uses no sudo).
• Guard and rules. A rule can bound a number in a call, such as a refund amount: Geometer
  checks it and Guard enforces it. Guard records one entry for each MCP tool call it handles.
• Geometer agents. Fourteen small open agents under Apache-2.0, eight of them each built
  on a different framework, to try Geometer on or take as a starting point:
  https://github.com/GeometerLabs/agents. They span games and live worlds, commerce and
  support, money movement and operations.

Everything from 0.1.0-alpha.1 is still here: finding where your agent breaks a rule, replaying
the problem, checking your fix, kept checks in CI, the trust file, Guard in front of a tool,
signed certificates and Under the hood.

Downloads

File	For
Geometer-0.1.0-alpha.2-macos-arm64.dmg	The macOS app (Apple silicon)
geo-0.1.0-alpha.2-macos-arm64.tar.gz	The terminal, macOS (Apple silicon)
geo-0.1.0-alpha.2-linux-x86_64.tar.gz	The terminal, Linux x86_64
geo-0.1.0-alpha.2-linux-aarch64.tar.gz	The terminal, Linux arm64
SHA256SUMS, release.json	Digests and the list of files
ghcr.io/geometerlabs/geo:0.1.0-alpha.2	geo ci on Linux CI

Install

• Mac app: download the .dmg, drag Geometer to Applications, then allow it once in System Settings →
  Privacy & Security → Open Anyway (the alpha is not signed by Apple yet). This is needed again for each version.
• Terminal, macOS or Linux: curl -fsSL https://geometer.dev/install.sh | sh (checks the digest and installs
  for your user, without administrator rights). Running it again upgrades; --rollback goes back.
• Linux CI: ghcr.io/geometerlabs/geo:0.1.0-alpha.2 (see the README).

Step-by-step instructions: https://geometer.dev/docs/install

Check your download

Download SHA256SUMS into the same folder as the file, then:

shasum -a 256 -c SHA256SUMS --ignore-missing     # macOS
sha256sum -c SHA256SUMS --ignore-missing         # Linux

Each line should end in OK. release.json lists every file with its platform, size and digest, and says that
nothing in this release is signed or notarized.

Known limits

The full list is on the Alpha limits page. The main ones:

• Not signed by Apple. macOS asks you to allow the app once for each version.
• Apple silicon only on macOS; no Intel Macs, no Windows, no Linux desktop app (on
  Linux, geo open opens the workspace in your browser).
• Agents Geometer can run are those whose tools it can find and simulate. When it
  cannot, it says what is missing instead of reporting a clean result. Supported means a real
  agent of that kind was checked from start to finish, not that every agent of that kind works.
• Outside services and models are simulated. A check shows how your agent behaves against
  those stand-ins, not against the real services or a real model. The service packs cover only
  part of what each provider offers.
• Guard is for trying in development and staging. It has not been qualified for
  production traffic. Wait a few seconds between geo guard stop and geo guard start: a
  start while Guard is still finishing can leave it stopped (check with geo guard status).
• Certificates are signed with a key made on your computer, so they show integrity,
  not who issued them. Certificate links are built but not switched on.
• Several parts have been tested only in part: starting Docker for you on a computer that
  lacks it, the geo command inside the Mac app, and the Cursor setting. Each is named on the
  Alpha limits page.
• Geometer has been used by its own team only. Your reports decide what we fix first.

Geometer 0.1.0-alpha.1

Geometer 0.1.0-alpha.1

Released 24 October 2026. The first public alpha. Free to download, no account, no telemetry.

What you can do

• Find where your agent breaks a rule. Geometer reads your project, works out what
  your agent can do and which business rules apply, and runs it in containers with things
  going wrong on purpose: a lost reply, a request cut short, part of a call applied, a lost
  acknowledgement, a crash. Outside services are simulated.
• Understand it. Each problem reads consequence first, with the run played step by
  step and what the runs where the rule broke had in common.
• Replay it, check your fix, keep the check. The same run, exactly; your change
  checked against it; and a kept check that geo ci runs from then on.
• Earn authority, action by action. The trust file shows what each action of your
  agent may do now and what evidence would make it ready for more. A person grants a level
  (with a limit, an owner and a review date), Guard enforces it, and a breach steps it down.
• Watch, then stop. Guard sits in front of a tool and first only records what it would
  have stopped; approving and denying held calls happens in the Live room.
• Share a certificate. A signed, self-contained report of what was checked, what held,
  what broke and what was not checked, with a dated audit export.
• See everything it does. Under the hood shows Geometer's processes, containers, CPU
  in cores and the network activity it can see.

Downloads

File	For
Geometer-0.1.0-alpha.1-macos-arm64.dmg	The macOS app (Apple silicon)
geo-0.1.0-alpha.1-macos-arm64.tar.gz	The terminal, macOS (Apple silicon)
geo-0.1.0-alpha.1-linux-x86_64.tar.gz	The terminal, Linux x86_64
geo-0.1.0-alpha.1-linux-aarch64.tar.gz	The terminal, Linux arm64
SHA256SUMS, release.json	Digests and the list of files
ghcr.io/geometerlabs/geo:0.1.0-alpha.1	geo ci on Linux CI

Install

• Mac app: download the .dmg, drag Geometer to Applications, then allow it once in System Settings →
  Privacy & Security → Open Anyway (the alpha is not signed by Apple yet).
• Terminal, macOS or Linux: curl -fsSL https://geometer.dev/install.sh | sh (checks the digest and installs
  for your user, without administrator rights).
• Linux CI: ghcr.io/geometerlabs/geo:0.1.0-alpha.1 (see the README).

Step-by-step instructions: https://geometer.dev/docs/install

Check your download

Download SHA256SUMS into the same folder as the file, then:

shasum -a 256 -c SHA256SUMS --ignore-missing     # macOS
sha256sum -c SHA256SUMS --ignore-missing         # Linux

Each line should end in OK. release.json lists every file with its platform, size and digest, and says that
nothing in this release is signed or notarized.

Known limits

• Not signed by Apple. macOS asks you to allow the app once (see the README).
• Apple silicon only on macOS; no Intel Macs, no Windows, no Linux desktop app (on
  Linux, geo open opens the workspace in your browser).
• Agents Geometer can run are those whose tools it can find and simulate. When it
  cannot, it says what is missing instead of reporting a clean result.
• Guard is for trying in development and staging. It has not been qualified for
  production traffic.
• Certificates are signed with a key made on your computer, so they show integrity,
  not who issued them.
• Geometer has been used by its own team only. Your reports decide what we fix first.