Squire

Name: Squire
Author: reidgoodbar

by reidgoodbarversion 0.6.5i★ –iRuns on your computer

Registry nameio.github.reidgoodbar/squire

Install

Overview

Description from the maker (original English)

CLI-first remote runtimes for validation and offload tasks, exposed over MCP stdio.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: SQUIRE_TOKEN

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: SQUIRE_TOKEN, SQUIRE_API_BASE_URL

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

DockerDocker installed

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "squire": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "SQUIRE_TOKEN",
        "-e",
        "SQUIRE_API_BASE_URL",
        "ghcr.io/reidgoodbar/squire-mcp:0.6.5"
      ],
      "env": {
        "SQUIRE_TOKEN": "your-value",
        "SQUIRE_API_BASE_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add squire --env SQUIRE_TOKEN=your-value --env SQUIRE_API_BASE_URL=your-value -- docker run -i --rm -e SQUIRE_TOKEN -e SQUIRE_API_BASE_URL ghcr.io/reidgoodbar/squire-mcp:0.6.5

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "squire": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "SQUIRE_TOKEN",
        "-e",
        "SQUIRE_API_BASE_URL",
        "ghcr.io/reidgoodbar/squire-mcp:0.6.5"
      ],
      "env": {
        "SQUIRE_TOKEN": "your-value",
        "SQUIRE_API_BASE_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "squire": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "SQUIRE_TOKEN",
        "-e",
        "SQUIRE_API_BASE_URL",
        "ghcr.io/reidgoodbar/squire-mcp:0.6.5"
      ],
      "env": {
        "SQUIRE_TOKEN": "your-value",
        "SQUIRE_API_BASE_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

SQUIRE_TOKEN secret env
Optional Squire session or headless token. The public service also supports anonymous access when no token is provided.
SQUIRE_API_BASE_URL env
Optional API base URL override. Defaults to https://api.squire.run.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account reidgoodbar, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32712 servers in this category
Published to the registry more recently than 6% of the other 32712 servers in this category
Basic checks equal to or better than 100% of the other 32712 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Squire safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: SQUIRE_TOKEN

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.6.5) reached the registry 7 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Docker on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Aiterm MCP

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Squire

Squire is a transparent local execution and verification layer for coding agents. It keeps common repository reads hot and continuously maintains whether the current declared workspace state is verified.

The agent keeps using ordinary terminal commands. Before Codex starts a local read-only command, Squire checks current state and either replays a proven mmap observation or executes a small bounded operation over hash-verified current file bytes. A valid hit returns the exact stdout, stderr, and exit status. Every miss follows Codex's original native execution path.

Install

curl -fsSL https://raw.githubusercontent.com/reidgoodbar/squire/main/install.sh | bash

The installer verifies matching Squire and Squire-Codex release archives and installs the driver, Codex runtime helper, and host-native Squire runtime to ~/.local/bin. It does not change Codex authentication or configuration. Supported hosts are macOS and Linux on amd64 or arm64.

Check the installation:

squire doctor

doctor exits nonzero when any required driver, helper, runtime, or ABI component is missing.

Use

Start from any directory:

squire codex

That is the complete user path. There is no setup command, global shell shim, prompt change, MCP tool, preload injection, or VM provisioning step. If Codex moves into a repository later, Squire discovers and prepares that repository from the command's actual cwd.

squire-codex is also installed as a direct convenience command.

Inspect the current repository and runtime:

squire status

squire status --json squire explain -- git status --short

Continuous Verification

Squire Green runs declared tests, lint, typechecks, and builds natively in the background after repository edits settle. Each result is bound to the exact declared input bytes, check configuration, environment, and executable. A later relevant edit makes that result stale; unrelated edits do not.

# .squire/checks.toml

[[check]] name = "tests" command = ["go", "test", "./..."] inputs = ["**/*.go", "go.mod", "go.sum"] timeout = "10m"

Repository-provided commands never run silently on first use. Review the file and trust its exact hash once:

squire green trust

squire verify

Any config change revokes trust. squire codex then schedules trusted checks automatically; no second daemon or warm command is required. See docs/GREEN.md for configuration and proof semantics.

What It Accelerates

Production lanes are bounded but cover the common read-only command surface:

Git metadata: supported git rev-parse forms and branch discovery.
Repository reads: supported git status, git ls-files, and git diff forms, including path-scoped diffs and git diff --check, plus bounded git log -N --oneline -- history.
File and search reads: bounded cat, ordered single- or multi-range sed -n, head, tail, nl -ba, file, fixed-string grep/rg, demand-prepared bounded repository rg searches, and tight ls forms.
Environment discovery: supported version probes, which/command -v, safe printenv, whoami, id, hostname, and uname forms.
Compositions: complete read-only plans over supported sources and filters, including pipes, sequences, redirection to /dev/null, head, tail, bounded sed -n, grep -F, wc -l, and sort.

No operation is removed. Builds, tests, edits, installs, mutating Git commands, expansions, unknown shell syntax, sensitive probes, and unsupported variants immediately follow Codex's unchanged native path. A safe cold miss does the same while requesting exact preparation in the background. rg --files remains outside the bounded preparation policy and follows the native path.

Supported commands compile into typed bounded plans rather than exact command templates. Source proof and execution are separate: one proven file snapshot can serve different line selections, filters, and compositions without a cache entry for each command string. The same plan representation is implemented by the Go engine and native runtime, keeping future read operators additive while differential tests enforce parity at the ABI boundary.

Why Hits Are Current

Squire caches observations, not authority. A foreground replay either recomputes the inputs that can affect that command or reuses a cryptographic fingerprint while a complete kqueue/inotify guard reports no dependency change. The prepared epoch must still match. Proof inputs include the normalized command and cwd, Git refs/index/config and external behavior files, relevant workspace state, canonical paths, content hashes, command-specific environment proof, and executable identity. Guard failure always invalidates the resident proof.

For bounded file reads, an epoch mismatch may instead use the current-file lane: Squire retains the exact bytes read while computing the foreground SHA-256 proof and applies only its fixed byte grammar to those bytes. This requires no rewarm and does not persist the file or result. The cache may still contain stale records, but they are never replayed after a proof mismatch. Missing state, corruption, unsupported syntax, an ABI mismatch, or an unprofitable proof all become native fallback.

The invalidation suite changes file bytes without changing size or mtime, mutates the Git index and untracked set, changes same-size diffs, edits Git config, commits, renames branches, changes loose and packed object namespaces, changes environment inputs, and probes outside-workspace symlinks. Returning old bytes or an unsafe hit fails the release.

See SQUIRE_CONTRACT.md for the complete invariants.

Current Runtime Check

On July 16, 2026, a 500-command randomized production-ABI run recorded 421 exact hits, 79 safe fallbacks, 468 native comparisons, zero mismatches, and zero unsafe hits. Hit p50/p95/p99 was 0.315/0.630/0.933ms; the same commands ran natively at 8.084/27.692/51.820ms. A separate 500-query repository-search differential had 500 exact or order-equivalent hits and zero semantic mismatches. Bounded path history was 28/28 exact at 0.333ms p50 and 0.492ms p99 versus 20.060ms native p50. All 2,048 steady calls were exact with 0.433ms wall p99. Under eight-way load, CPU p99 was 0.334ms; scheduler- contended wall p99 was 3.242ms.

Fresh live gpt-5.6-luna treatments independently replayed 2/3 Express calls (66.7%), 5/5 Flask calls (100%), and 4/5 fmt calls (80%). Every treatment passed the 50% all-terminal-call gate with valid accounting and zero diagnostic mismatches. These small live samples validate coverage, not causal whole-task wall time; model trajectories diverged before seeing tool results.

A deterministic 40-pair Codex attribution test held model responses, commands, workspace, and terminal payloads fixed. Six serial calls fell from 374.876ms to 103.600ms, saving 271.277ms (72.4%, paired 95% interval 265.630-276.540ms). Two parallel batches saved 52.6%. AB and BA orders both remained positive, while interleaved A/A and B/B intervals included zero.

Full methodology and historical tables: docs/BENCHMARKS.md.

Architecture and backend notes: docs/ADVANCED.md.

Squire

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Aiterm MCP

README from the maker

Squire

Install

Use

Continuous Verification

What It Accelerates

Why Hits Are Current

Current Runtime Check