Header (logo + tagline) is the only fixed region. Footer removed.
Everything else — tab bar, transcript, prompt — now lives inside one
.repl-stream scroller. A fresh session shows the prompt right under
the tabs near the top; as entries arrive the prompt drifts down with
them. Tabs use a dashed bottom rule instead of a heavy bar so they
read as the start of the stream rather than a separate chrome strip.
Reads as one continuous stream now. Each entry is just:
λ> <input>
<output> ; tier · NNms
No left border, no boxed cards, no side-column tier label. Output
indents under the prompt (3ch) using monospace ch units. Tier+time
render as a Lisp-comment-style suffix in muted color.
Prompt bar: borderless textarea on the code-bg surface so the input
visually joins the transcript above. Placeholder cut to "(+ 1 2)" —
the surrounding text already explains the semantics.
Multi-line inputs keep prompt continuation marks ("..").
Interactive REPL at lumbda.com/repl with:
- multi-tab sessions (click + to add, × to close, double-click to rename)
- per-tab tier selector (python/c/asm/all-three race)
- persistent transcripts encrypted in localStorage via Web Crypto
(PBKDF2 + AES-GCM, vault id = SHA-256(password || device-salt) —
same pattern as unsandbox's vault-encryption-design.md, native
crypto.subtle API instead of CryptoJS)
- ephemeral mode (skip vault, transcripts vanish on reload)
- one worker per (tab × tier) — state persists across evals in a tab
- reboot tier button (terminate this tab's worker, fresh state next eval)
- cancel button (kills the running worker in active tab)
Home page now links to both /playground/ and /repl/.
Tier state itself does NOT persist across reloads — the transcript does,
but defines/set!/hash-tables vanish with the worker. Portal save/resume
in WAT (deferred) will let a tier session survive close+reopen.
