shoney.arickathil 5521d21a84 docs: pending iterations renumbered by dependency + priority

- developer directive: pending iteration IDs now ARE the priority order;
  LANDED iterations keep historical numbers (code comments and commit
  history cite them — records, not a queue); 8/11 (the half-landed
  arc), 17 (parked, artifacts on a branch), 18 (next, artifacts named)
  also frozen
- mapping (recorded in 00-story): 19<-20 Float+Bytes, 20<-9c attach,
  21<-9d keypair, 22<-9e benchmarks, 23<-9f io_uring WAL, 24<-19 chat,
  25<-10 services, 26<-12 blue-green, 27<-9g query corpus,
  28<-14 skillhost, 29<-13 metaprogramming
- 11 story files renamed; every doc reference re-numbered (word-boundary
  sweep for the lettered 9x ids, phrase-level for numeric ones); the
  iterations table rewritten with Seq == priority and "(was N)" notes;
  story-scoped link check: zero broken
- merge-recovery folded in: the partial master merge had dropped the
  chat story, the fibers exploration note, the arc spec+plan, the
  framework-v2 plan, and the iteration-17 spec+plan — all restored from
  their branches and renumbered consistently

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2026-08-20 14:31:09 +02:00

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Iteration 24 — chat: the WebSocket pub/sub driving workload

Format: product/story-iteration-template. Part of Story — one language, one runtime, one database, one binary.

Inserted 2026-08-20 (concurrency-chain refinement): the 8+11 arc's driving workload, the role log-watcher played for iterations 3–7. Needs its spec AFTER the arc's — it lands at the arc's end and proves it.

Why this iteration exists

Everything the framework ledger parks behind concurrency — WebSockets, pub/sub, streaming, per-request cancellation, the keep-alive parking retirement — needs a workload that actually exercises long-lived connections and cross-shard broadcast, or the arc ships mechanism without proof. Chat is the smallest honest such workload: rooms, N concurrent clients, fan-out on every message, presence on connect/disconnect — one binary, no broker.

Goals

docs/examples/chat: rooms + broadcast + presence over WebSocket, served by the framework through [deps] exactly as the web-app is.
Framework grows the WS mechanism in pure .wo: the HTTP/1.1 upgrade handshake (Sec-WebSocket-Accept needs SHA-1/base64 — the crypto-builtin fork's first real consumer), frame parse/serialize (text, close, ping), fiber-per-connection serving (iteration 11), and in-memory channels whose delivery is cross-shard message send (iteration 8).
The arc's acceptance teeth: 1k concurrent clients across shards, broadcast latency measured, starvation-free under one hot room, SIGTERM drains every connection cleanly.

Acceptance Criteria (draft — the spec after the arc refines)

Given two clients in one room on DIFFERENT shards, when one sends, then the other receives the frame (cross-shard ownership-move delivery), and a third client in another room receives nothing.
Given 1k connected clients with one hot sender, when the reduction budget preempts, then every room keeps making progress (no starvation) on one OS thread per core, verified by TID.
Given SIGTERM with clients connected, when the server drains, then every connection gets a close frame, every fiber unwinds its drop maps (ASan zero leaks), and the process exits 0.
Given the web-app running beside chat features, when the standing gates run, then nothing regresses — HTTP and WS share the serve loop honestly.

Out Of Scope

Message persistence/history (a @table an app adds if it wants — not the workload's point); auth beyond the existing bearer mechanism; permessage compression; binary frames beyond echo coverage; wss (TLS stays at the proxy — the proxy story extends to WS pass-through, documented).

Info

Dependencies: the 8+11 arc (fibers + cross-shard send), the crypto builtins fork (SHA-1 for the upgrade handshake — note: the ledger's crypto slice lists SHA-256/512; the WS handshake specifically needs SHA-1, so the builtin set must include it), and the framework's parse seam (upgrade is an HTTP request until it isn't).
Unparks on landing: the framework ledger's WebSocket/pub-sub rows and the iteration-18 rejection note ("pub/sub REJECTED until 8/11").

Proposed Solution

Brainstorm → spec → plan after the arc's spec exists; the arc's plan and this iteration's are written against each other (the arc names chat as its acceptance, chat names the arc as its substrate).

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