Stand up executus/tools — the generic, host-agnostic tool library — and prove
the full pattern end to end:
- tools/tools.go: Register(reg) adds the always-available zero-dependency tools
(currently `think`). A light host calls it and is immediately useful; backed
tools (web/store/meta groups) will register via grouped registrars with
nil-safe Deps as they land.
- tools/think.go: the `think` tool moved from mort (imports only executus/tool).
- tools/integration_test.go: end-to-end proof that the executor runs an agent
which CALLS a registered tool — the fake model emits a `think` tool call, the
executor dispatches it through the registry, the model finalises, and the step
instrumentation captures the `think` step. Exercises the full tool-dispatch
loop through run.Executor.
Stacked on phase-2-run-kernel (P3 needs run.Executor). Remaining P3: the
meta/web/net/store/compose groups + their Deps + default backends (splitting
mort's default.go grab-bag).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
