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lease-checkout

A deny rule by default: it refuses a worker holding a checkout running magus outside it, and names what to run instead.

What it catches

A worker holding a checkout running magus outside it.

Why

A host shell can start a subagent in its parent directory, and a cd never persists between calls, so the guard places each magus call by its line and judges it there. The holder of a row with a standing checkout runs magus in that checkout: name it on the line with -C <root> or a cd before the call, and the refusal quotes that line. A call whose directory cannot be read is placed where the host started. A plan, a dry run, a graph or help runs nothing and passes, and so does a caller with no lease, a row with no checkout and the root session.

Default and override

By default this rule takes the decision deny. A workspace sets it by name, in its root magusfile, to deny, advise or off:

magus\guard.builtins({"lease-checkout": "advise"})

A loosening takes effect once it is committed; a tightening applies at once.

Seeing it

A verdict names its rule in brackets, which is how you got here:

deny [lease-checkout]: ...

A workspace that sets this rule to advise sees advise [lease-checkout]: ... instead.

magus describe rule lease-checkout prints the same entry at a terminal, and magus describe rules lists every rule this workspace enforces.

See also

guardruleslease-checkoutdeny
Last updated (580de406)
Glossary

Workspace

The magus root directory that owns a set of projects and shared config; the unit magus operates over. Workspace in full.

Magusfile

The magusfile.buzz that declares a project's targets (as export funs) and binds its spells. Magusfile in full.

Buzz

The language magusfiles are written in (the .buzz engine). Buzz in full.

CI

An ordinary target you compose yourself with ctx.needs; magus does not hardcode its stages. It is the anchor magus affected ci keys off, and ci strips the rw charm. CI in full.

Agent

A model working through an agent host such as Claude Code, Codex, Cursor or OpenCode. magus treats an agent as one more caller of its CLI, MCP tools and console, held to the same checks as a person. Agent in full.

Session

An agent host's conversation, by the id the host delivers to its hooks. magus never mints one: a record with no session is unattributed, and the OS user it carries says whose account ran it. Session in full.

Run

One target executing under one magus invocation, such as magus run test web or magus affected ci. A run keeps its captured output behind an output reference. Every magus run is a run whether or not any job asked for it; see Job for how the two relate. Run in full.

Lease

The grant a holder takes on a job: the write and read paths that job declared, enforced in the checkout that took it with magus job exec. A job is the piece of work; a lease is permission over it. Lease in full.

Conventions

Placeholders

Angle brackets mark a value you replace with your own; never type the brackets:

magus run <target>
magus completion <shell>    # e.g. bash, zsh, fish

<target>, <path>, <shell>, <name> and the like are stand-ins, not literal text.