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9869f24319
Inverts the previous design. buzz-agent no longer calls
goose::agents::Agent::reply -- it drives its own round loop and calls
goose for the four heavy components:
model call Provider::stream (via Agent::provider)
tool surface Agent::list_tools
tool execution Agent::dispatch_tool_call
system prompt PromptManager (our own instance)
compaction context_mgmt::{check_if_compaction_needed, compact_messages}
Under Agent::reply every buzz-specific behaviour had to be smuggled in
around goose's turn policy: the _Stop veto needed an outer loop purely to
re-enter reply(), and [Reflect] had to be delivered as a *steer* because
the tool result itself was out of reach. Owning the loop removes the
smuggling -- the veto is a branch, and [Reflect] goes back on the tool
result where buzz-agent originally put it and where the model reads it in
context.
New modules:
loop_drive.rs the round loop: inference, tools, compaction, _Stop veto,
steer drain, cancellation, max-rounds bound
tools.rs parallel dispatch, announce->terminal wire invariant,
[Reflect] on failure
prompt.rs our PromptManager (goose's is pub(super) to Agent::reply)
steer.rs our steer queue (goose's drain is pub(crate) to reply)
agent.rs shrinks to what goose knows nothing about: ACP session/update
emission and the keepalive ticker. Tool lifecycle now emits from tools.rs,
which is the only place that knows when a call starts and ends -- emitting
from streamed content as well would double-announce every tool.
Behaviour preserved and covered by the existing suite: Fizz persona,
_Stop veto (cap 3), [Reflect] (cap 8), _PostCompact re-injection,
steering without cancellation, cancel leaving no unresolved tool call,
usage accounting, and the model catalog.
81 unit + 21 integration tests pass; clippy clean (the one hints.rs
warning predates this branch).
Co-authored-by: Michael Neale <michael.neale@gmail.com>
Signed-off-by: Michael Neale <michael.neale@gmail.com>