pastilhasandClaude Opus 5
5bdb2474ea
A conversation is turn-based: your message, the work, the answer, repeat. The
moment you send the next message the tool calls and running commentary that
produced the last answer stop being what you are reading and start being what you
are scrolling past. So every turn but the live one collapses to three parts —
what you asked, one summary row, and what I concluded — with the summary naming
what you gave up ("5 tool calls · 2 messages · 1 failed") so you can tell whether
you want it back. Failures are counted on the summary rather than only inside,
because a red row you have to open to find is a red row you never find.
It is a pure derivation over the message list rather than state, which is what
makes a reload render identically to a live session: no wire format, no
persistence, no server change. Dividers and compaction seams split a fold instead
of disappearing into one, because "5 tool calls" hiding a /clear misreports what
happened to the conversation rather than to the work.
A turn that ends cleanly without saying anything gets a marker row. It happens
rarely and is disproportionately confusing — the composer re-enables and nothing
appears, which is indistinguishable from a turn that died. Deliberately a seam and
never prose: words in my voice that I did not write are a lie, and the next time it
happened you would not know which kind of row you were reading.
Fold-open state lives in the list, not the fold, because rows are virtualised and
state inside one would be thrown away when it scrolled past the overscan window.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>