- type
- Cloud build agent
- interface
- Cloud (Web UI, GitHub App) + open-source local runtime
- openSource
- Partial (Apache-2.0 runtime; cloud control plane proprietary)
- lineage
- Policy pinned by digest for the whole session, isolated execution machine, credentials kept out of the agent process, hard token caps metered by the user's own provider, encrypted evidence storage; delivers all work exclusively as a pull request on an isolated branch (or a labelled failure), never auto-merges; the open-source Apache-2.0 runtime is described as the same agent that runs in the hosted cloud, runnable on your own laptop
- note
- Surfaced via Show HN 2026-09-03 ('Jern Cloud, a coding agent bound by a policy file in your repository'). Distinct from other tracked cloud build agents (Hoplite: Slack/Linear/Sentry dispatch; Blacksmith codesmith: CI-failure autofix) via its governance-first pitch: a team approves a pinned policy once, then every subsequent session is bound to it, with hard token-cap enforcement and PR-only, never-auto-merge delivery as the core product claim. The Apache-2.0 local runtime is confirmed as real, populated source code (github.com/jern-ai/jern: F# host and CLI, sample agents, an xUnit test suite, 119 commits), not just a marketing claim; that the hosted cloud service runs the identical agent is a vendor assertion that cannot be independently verified from outside.
- iconUrl
- /research/harness-icons/jern.png
