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spawn-names-model

Off by default: once a workspace turns it on, it reports a main thread spawning a subagent without naming the model it runs on.

What it catches

A main thread spawning a subagent without naming the model it runs on.

Why

A spawn that names no model runs the child on the session's own, usually the costliest it uses. At standard it advises once; at strict it refuses, and also refuses a spawn whose job row records a model tier when the spawn's model is not at that tier. The model resolves to a tier through the host's aliases in the workspace's model-tier declaration, and the two compare by rank; a host the declaration maps no model for is refused naming the hosts entry to add. The refusal names the row's tier, rank, alias, the source that chose it, its reason and the declaration's site. A spawn bound to no row, or to a row forked with no tiers declared, is judged on the missing model alone.

Default and override

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

magus\guard.builtins({"spawn-names-model": "deny"})

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:

advise [spawn-names-model]: ...

A workspace that sets this rule to deny sees deny [spawn-names-model]: ... instead.

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

See also

guardrulesspawn-names-modeloff
Last updated (29d8b3de)
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.

Job

The unit of delegated work, and one row of the job store: what an orchestrating agent handed out, with its goal, the checkpoint it was cut against, the paths it may write or must not touch, and the one check it runs. A job's holder is either a session, for work an orchestrator handed out, or the daemon, for its own maintenance. The store records; the agent guard is what reads those facts back when grading a write. Job 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.

Conventions

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