01
Inference, routed
Choose the right model per task. Route through infrastructure you control instead of hard-wiring your workflow to one provider.
Private preview
Your agent.
Your machine.
Your rules.
Jeden is a private coding-agent harness built for teams that need more than a chat window. Local policy, controlled tools, durable sessions, and model freedom—without giving up the terminal.
❯ jeden "trace the billing regression"▋
Reading project context and active policy…
01 Located 4 affected callsites
02 Reproduced stale entitlement state
03 Applying guarded patch
− cache.get(accountId)
+ await cache.refresh(accountId)
WRITE Approve changes to 2 files? [y/N]
01 Observe
02 Decide
03 Act
LOCAL-FIRSTEXPLICIT POLICYMODEL AGNOSTICDURABLE SESSIONSGUARDED MUTATIONS
01 Design contract
Powerful agents need
hard boundaries.
Jeden separates inference, policy, tools, and the run loop. Each part stays visible, inspectable, and under your control.
The model can reason freely. The harness decides what may actually happen.
02
Policy, explicit
Approvals, path jails, hooks, and tool permissions are local contracts—not hidden behavior inside a hosted agent.
03
Execution, accountable
Every read, command, edit, artifact, and approval remains attached to a durable session you can inspect and resume.
02 Built for real repositories
One harness.
The whole loop.
From the first file read to the final verification, Jeden keeps the work inside one controlled, resumable system.
Terminal-native
Interactive and one-shot modes, searchable views, native diffs, and approvals that stay where engineers already work.
Controlled tools
Jailed filesystem access, guarded writes, process control, search, browser, MCP, delegation, and custom JavaScript tools.
Durable context
Transcripts, artifacts, memory, todos, modes, and project context survive beyond a single prompt or terminal window.
Open by design
Lifecycle hooks, extensions, plugins, commands, MCP servers, and project-local configuration make the harness yours.
03 A session, not a prompt
Leave. Return.
Keep going.
Jeden records the work behind the answer—tool results, artifacts, decisions, and state—so a serious task can outlive a single interaction.
❯ jeden sessions
❯ jeden show ses_7fa2
❯ jeden resume ses_7fa2 "continue"
SESSIONses_7fa2 · active
TRANSCRIPT42 events
ARTIFACTS5 persisted
MEMORYproject scoped
04 Security model
Trust is not
a toggle.
Jeden makes authority narrow, visible, and revocable.
Approve the effect
Writes and commands require explicit approval unless policy grants them.
Constrain the surface
Path jails and allowlisted tools bound what the agent can reach.
Guard every mutation
Snapshot-tagged edits reject stale state instead of overwriting it.
Retain the evidence
Session ledgers preserve the chain from request to verified result.
Private preview
Build with an agent
you can actually own.
Jeden is being developed with a small group of engineering teams. Tell us what you want your agent to do—and what it must never do.
Request private access ↗