Open source platform for automating sandboxed coding agents

Automate engineering workflows. Credential brokering gives agents tool access without exposing secrets.

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Mistle session workspace showing an agent plan, pull request summary, and code diff

Features

Core product features

Connect the tools your team already uses

Start with GitHub, Slack, OpenAI, and a growing set of integrations.

Configure agent sandboxes

Choose the agent harness, repositories and tools each session starts with. Configure the setup script that is used to create and refresh snapshots.

Integration

Resources & tools

OpenAI Codex

GitHub 2 repos, github-cli

Linear linear-mcp

Attribute agent work to the right person

Link GitHub and Slack accounts so work maps back to the human who started it.

Linked accounts

GitHub jlowhy

Slack jonathan

Scheduled snapshots

Start sessions quickly from snapshots, with scheduled refreshes to keep tools and dependencies up to date.

Automatic refresh

Cron expression

0 9 * * 1

Jump into any agent session

Open a linked session to inspect, steer, or review agent work.

Mistlebot says

I'll audit the Dependabot PRs and run the relevant checks. (View session)

Automate work from events or schedules

Respond to webhooks, app mentions, or cron schedules to automate engineering workflows.

Events

github.pull_request.opened

slack.app_mention

Schedules

0 9 * * 1-5

daily at 9:00

Security model

Credentials stay outside the sandbox

Agent calls to external tools leave the sandbox without credentials. A proxy applies policy, resolves the right credential, and injects authorization for each call.

Read the architecture docs

Sandbox

credentialless request

Proxy

policy + credentials

Upstream

authorized request

Use cases

Automate workflows from the tools you use

Turn issues into verified PRs

@mistle build the invite flow from this ticket

GitHub

Linear

OpenAI

Investigate production bugs

@mistle investigate checkout timeout

Slack

SigNoz

AWS

Review PRs automatically

@mistle review diff, run tests, and harden coverage

GitHub

Run scheduled maintenance

@mistle review and merge dependabot PRs

GitHub

Availability

Mistle is available to self-host

Hosted cloud is in development. For larger teams or custom requirements, talk to us directly.

Open source

Self-host Mistle

For teams that want infrastructure control.

View GitHub

Hosted Cloud

Mistle Cloud

For teams that prefer a managed cloud option.

Join Waitlist

Custom

Enterprise

For teams with security, compliance, or deployment requirements.

Book a call

Talk to our team

Exploring Mistle for a team or production rollout? Talk to us about early access and deployment requirements.

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