feat(board): live-stream stdout/stderr in the logs pane during a press#149
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Before: pressing a button from the board executed it silently — the logs pane only showed PAST run summaries, not the current press's output as it happened. Now: when a press fires, the board 1. creates a LineSink channel and passes it into engine.Execute 2. auto-opens the logs pane so the live feed is visible 3. reads lines via a readFromSink tea.Cmd pub/sub loop 4. renders the last ~8 lines in the pane with stderr in red, stdout in primary, timestamps muted, a "● live" badge in the header flipping to "· done" when the stream closes Lines are capped at 200 per button so runaway scripts don't OOM the TUI; the tail is always freshest. The live buffer survives past press completion so the user can see what just ran — it's reset to empty only on the next press of that same button. runPress now accepts (and closes) the sink channel. Execute's existing LineSink interface did all the heavy lifting — this is a consumer, not a new engine feature. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This was referenced Apr 20, 2026
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Answers "how do I press a button and follow the logs at the same time" inside the board — the natural home.
Before: pressing a button from the board ran silently. The logs pane only showed past run summaries. No way to watch output as it happened.
Now:
How it works
runPress now passes a LineSink channel into engine.Execute (the existing streaming hook). A Bubble Tea pub/sub loop (`readFromSink` Cmd) emits one liveLineMsg per line; the Update handler appends to m.liveLines and re-schedules. The channel is closed by runPress after Execute returns, which terminates the loop via liveStreamDoneMsg.
No engine changes — LineSink was already there for this exact purpose.
Test plan
🤖 Generated with Claude Code