What the fast path calls unknown is judged by an independent model call
on the item's classifier role (L4), before it runs.
- nisse_dev.loop.classifier: it sees the action and the agreed scope
(project, repository, issue number, the restatement the operator said
go to), built in code; never the transcript, the issue's text, tool
output or the driver's reasoning. Its verdict is a tool call: safe
runs; in_scope runs and is reported in the thread; needs_discussion
asks, as a dangerous action does. An error, no verdict or an unknown
one fails closed. Verdicts are cached per item, agreed revision and
action. A helper is refused what needs discussion.
- action_verdict gains source, model and the classifier's exact input;
details shows the source. An allow after the classifier asked is an
override. scripts/classifier-evals.py exports the judgements from a
store, read-only; tests/integration/classifier_cases.yaml is the seed
set, run per model with --capability-models.
- The fast path's delete rule: deleting on the build VM is contained;
only what breaks the host (system and home directories) stays
dangerous, since in tests the build VM is the test machine.
- The classifier role is the local model in the example config.
- The property walk gains a classifier answering at random, junk and
failures included; dangerous_only_when_allowed now covers its
verdicts (checked against a mutant that runs them all).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE
Every execution tool call, the driver's and a helper's, gets a verdict
from code before it runs (P3, P4, D6).
- nisse_core.actions, nisse-core's first code: Action and Verdict, and
reading shell commands statically, segment by segment (cd, wrappers,
sh -c). What can't be read that way is unknown; a line is as bad as
its worst command.
- nisse_dev.loop.actions, the rule table: reading, checks and tests are
harmless; workspace edits, local git and installs on the build VM are
contained; pushing, other hosts, uploads, publishing, the forge's own
tools, deleting outside the workspace and wrecking the VM are
dangerous; changing branches by hand is refused (the harness owns
branches) with a pointer to the milestone tools.
- A dangerous call isn't run. The item waits on the operator with a
question rendered from the action, and `allow` lets exactly that
action run once. A helper can't ask, so it is refused and told to
hand back. Unknown actions run, logged, until the classifier (M3.2).
- Every verdict is an action_verdict event, which no model sees, and an
oplog line; `details` shows the counts and every action not simply
run.
- The property walk gains dangerous_only_when_allowed (checked against
a mutant that doesn't use the allow up); the slice e2e checks every
call was judged and none needed an allow.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE
dongarandClaude Opus 5.5