Add bench/ — a 4-category × easy/medium/hard task matrix (shell, code, git,
multi) and a runner that drives the live TUI over tmux and grades each task by
a `podman exec` verify snippet (exit 0 == PASS), never by the model's
self-reported summary (which the weak CPU model fabricates). Tasks run in the
agent's real cwd with bare filenames so the suite measures task completion, not
the model's absolute-path discipline. Completion is detected off the viewport-
independent `is thinking…` footer (the TUI is full-screen, so capture-pane
scrollback is not chat history).
First baseline (qwen2.5:3b): 2/12 PASS, high variance. Surfaces the next
harness-addressable improvements — `<native>` tag leakage and bare
tool-call-as-text — now measurable against this suite. Findings doc updated.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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