- Rename 'chat' to 'log': returns last 64KB sliding window (static read).
Tail still works via Qid.Vers. Full history persisted to disk per turn.
- Add 'chat' streaming file: blocking read that delivers new output as
the agent produces it. Per-fid offset tracked via waitBase. Blocks
indefinitely between turns (no EOF). EOF only on kill/session death.
- Add LongBlock interface to File: streaming files bypass the 5s read
timeout. Server returns content directly (ignores Tread offset for
streaming files since waitBase tracks position).
- Add 'kill'/'.'' ctl aliases with FIXME: currently kills entire session.
When multi-agent-per-session lands, kill should kill agent only.
- Rewrite acme frontend (cmd/Ollie) to use 9P client directly instead
of FUSE mount. streamChat() is a blocking read loop — no polling.
All file operations (read, write, ls) go through plan9/client.
- Add 9P streaming prototype in experiments/9p-stream demonstrating
the blocking-read pattern for token delivery.
The key insight: 9P's request-response model gives natural streaming.
Server holds the Tread until data arrives, client blocks on Read().
No polling, no signals, no offset tracking needed.
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