On the API key runtime the classifier now hands claude its prompt as one
stream-json user message (`--input-format stream-json`) with two text
blocks: the PR's shared context, carrying `cache_control: ephemeral`, and
the classification's question.
As plain stdin text the whole prompt was one block, and claude puts its
only message breakpoint on the last block, after the question. The cache
writes an entry only where a breakpoint is, so no entry ended at the
shared-context/question boundary. Every classification wrote the whole
prompt and none read it (production: cacheRead ~0, cacheCreation ~input).
The system-prompt prefix (~270 tokens) is under the minimum cacheable
length. Captures against a local listener with a dummy key (claude
2.1.223) show the client breakpoint survives on the shared block, and that
claude adds none there on its own.
The PR stays in the user role: moving it into the system prompt would give
untrusted PR text the system prompt's authority.
`Model::ask` takes a `Prompt { shared, question }`. The ACP runtime joins
it back into the same text it sent before.
Refs #5245
An answer whose reason ran past 500 characters was rejected whole, so the
verdict was lost and the one error row turned the review into no_verdict.
The reason is cut to the cap, ending in an ellipsis; verdict and certainty
are kept.
The leaf's key was copied by a host unit into the container's root on
host disk. nspawn now reads the cert, key and store CA as root at
container start (--load-credential) and passes them in as system
credentials; the daemon's unit loads them by bare id, as an agent's
container does with its own leaf (nix/agent-modules/bao.nix). The copy
unit is gone. Where this host mints the leaf, the container starts after
swarm-bao-pki, since nspawn refuses a missing credential source. An
assertion refuses identity paths with whitespace, which nixos-container's
unquoted extra flags would split.
A new service crate. It reads its queue client secret from the store at
start, takes try-outs on the review classifier subject in its queue
group, and for each run reads the Anthropic API key from the store,
builds the shared context (commits with full messages, diff with
lockfiles collapsed), runs one claude --print per classification with no
session, no tools, no MCP server and the key in the child's environment
only, validates the JSON answer and aggregates the rows. A missing key or
a run where no classification got an answer fails the run; one failed
classification is an excluded row with its error. One journal line per
run names the operator, repo, PR, head SHA, rows and overall verdict.
swarm-secret-client gains the two paths the service reads.
