Updates

network-stack/hyper-p2p-congestion-signal/CHANGELOG.md

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+# Changelog
+
+<!-- legacy: v0.1.0 -->
+
+- Initial release: Gossip RTT/loss samples and recommended send rates.
+<!-- legacy: v0.3.0 -->
+
+- Wave 6: presence-tier API tables, architecture wire section, validation test.
+
+<!-- legacy: v0.3.1 -->
+
+- Wave 7: correct protocol in docs, getStats(), wire tables, category README.
+## [0.3.2] - 2026-05-21
+
+### Changed
+- Exhaustive documentation pass (api, architecture, README) per DOC_STANDARDS.md.

network-stack/hyper-p2p-congestion-signal/README.md

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+# hyper-p2p-congestion-signal
+
+Production network stack module: Hyperswarm discovery + Protomux when `topic` is set.
+
+**Category:** Network stack
+
+**Composes with:** `hyper-p2p-protocol-handshake`, `hyper-p2p-connection-pool`, `hyper-p2p-overlay-topology`
+
+**Protocol:** `congestion-signal/v1`
+
+## When to use
+
+Multi-peer apps that need network stack over a shared Hyperswarm topic.
+
+## When not to use
+
+Single-process tools with no P2P topic (use local APIs only or skip `ready()`).
+
+## Quick start
+
+```js
+const { HyperP2PCongestionSignal } = require('hyper-p2p-congestion-signal')
+const topic = process.argv[2] // 64-char hex or string
+const mod = new HyperP2PCongestionSignal({ topic, enableBackgroundTimers: false })
+await mod.ready()   // joins swarm when topic set
+// ... application logic ...
+await mod.close()
+```
+
+## Docs
+
+- [docs/api.md](docs/api.md) — constructor, methods, events, errors
+- [docs/architecture.md](docs/architecture.md) — wire types, state, composition
+- [../_shared/PRODUCTION.md](../../_shared/PRODUCTION.md) — production checklist
+- [../_shared/DOC_STANDARDS.md](../../_shared/DOC_STANDARDS.md) — documentation standards
+
+- Integration: [`../../real_tests/integration/`](../../../real_tests/integration/) — `congestion-signal-two-node.js`
+
+## Test
+
+```bash
+npm install && npm test
+```

network-stack/hyper-p2p-congestion-signal/docs/api.md

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+# API: hyper-p2p-congestion-signal
+
+**Protocol:** `congestion-signal/v1`
+
+**Export:** `HyperP2PCongestionSignal`
+
+## Overview
+
+Production network stack module: Hyperswarm discovery + Protomux when `topic` is set.
+
+## Constructor
+
+```js
+const mod = new HyperP2PCongestionSignal(opts)
+```
+
+| Option | Type | Default | Description |
+|--------|------|---------|-------------|
+| `topic` | varies | null | topic |
+| `keyPair` | KeyPair | random Ed25519 | keyPair |
+| `baseRateBps` | number | 1_000_000 | baseRateBps |
+
+## Methods
+
+### `reportSample(peerId, rttMs, loss = 0)`
+
+- **Returns:** `value`
+- **Throws:**
+  - `Error: invalid rtt or loss`
+  - `Error: peerId required`
+
+### `getHint(peerId)`
+
+- **Returns:** `value`
+- **Throws:** — (none documented in method body)
+
+### `shouldThrottle(peerId)`
+
+- **Returns:** `value`
+- **Throws:** — (none documented in method body)
+
+### `getStats(—)`
+
+- **Returns:** `object`
+- **Throws:** — (none documented in method body)
+
+### `ready(—)`
+
+- **Returns:** `Promise`
+- **Throws:** — (none documented in method body)
+
+### `close(—)`
+
+- **Returns:** `Promise<void>`
+- **Throws:** — (none documented in method body)
+
+## Events
+
+| Event | Payload |
+|-------|---------|
+| `closed` | no payload |
+| `sample` | s |
+
+## getStats()
+
+Returns `{ ...this._stats }` — typically `ops`, `errors`, and module-specific counters (`created`, `relays`, `open`, `peers`, etc.).
+Library-only modules may include `mode: 'local'`.
+
+## Errors
+
+Stable message substrings: see [`../_shared/ERROR_CODES.md`](../../_shared/ERROR_CODES.md).
+
+## P2P
+
+When `topic` is set, `ready()` joins Hyperswarm and opens Protomux `congestion-signal/v1`.
+
+## Testing
+
+```bash
+npm install && npm test
+```
+
+Integration: [`../../real_tests/integration/congestion-signal-two-node.js`](../../../real_tests/integration/congestion-signal-two-node.js)

network-stack/hyper-p2p-congestion-signal/docs/architecture.md

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+# Architecture: hyper-p2p-congestion-signal
+
+**Category:** Network stack
+
+```mermaid
+flowchart LR
+  App[Application] --> Mod[HyperP2PCongestionSignal]
+  Mod --> Mux[Protomux congestion-signal/v1]
+  Mux --> Swarm[Hyperswarm]
+```
+
+## Sequence (P2P)
+
+```mermaid
+sequenceDiagram
+  participant App
+  participant Mod as Module
+  participant SW as Hyperswarm
+  participant Peer
+  App->>Mod: ready(topic)
+  Mod->>SW: join(topic)
+  SW->>Peer: connection
+  Mod->>Peer: gossip / Protomux
+  Peer-->>Mod: onmessage
+  Mod-->>App: emit(event)
+```
+
+## Wire messages
+
+| type | fields | direction | behavior |
+|------|--------|-----------|----------|
+| `congestion-sample` | sample | gossip | Handled in onmessage / gossipSend |
+
+## State model
+
+- In-memory `Map` / `Set` structures for hot path
+- Optional Hyperbee/Hypercore persistence when `storageDir` or `memoryOnly` is configured
+- `close()` tears down swarm, timers, and clears ephemeral state
+
+## Composition
+
+Composes with: `hyper-p2p-protocol-handshake`, `hyper-p2p-connection-pool`, `hyper-p2p-overlay-topology`.
+
+See [`../_shared/WAVE6_NETWORK_STACK.md`](../../_shared/WAVE6_NETWORK_STACK.md) for layer ordering.
+

network-stack/hyper-p2p-congestion-signal/examples/basic.js

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+require('bare-process/global')
+const { HyperP2PCongestionSignal } = require('..')
+
+async function main () {
+  const m = new HyperP2PCongestionSignal()
+  m.reportSample('peer', 30, 0)
+  console.log('ok', m.getStats())
+  await m.close()
+}
+
+main().catch(console.error)

network-stack/hyper-p2p-congestion-signal/index.js

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+require('bare-process/global')
+const EventEmitter = require('bare-events')
+const { initModuleSwarm, gossipSend } = require('../../_shared/p2p-bare.js')
+const PROTOCOL = 'congestion-signal/v1'
+
+class HyperP2PCongestionSignal extends EventEmitter {
+  constructor (opts = {}) {
+    super()
+    this.topic = opts.topic || null
+    this.keyPair = opts.keyPair || require('hypercore-crypto').keyPair()
+    this.baseRateBps = opts.baseRateBps || 1_000_000
+    this._samples = new Map()
+    this._stats = { samples: 0 }
+    this.swarm = null
+    this._peerMsgs = null
+  }
+
+  reportSample (peerId, rttMs, loss = 0) {
+    if (!peerId) throw new Error('peerId required')
+    if (rttMs < 0 || loss < 0 || loss > 1) throw new Error('invalid rtt or loss')
+    const s = { peerId, rttMs, loss, at: Date.now() }
+    this._samples.set(peerId, s)
+    this._stats.samples++
+    if (this._peerMsgs) gossipSend(this, { type: 'congestion-sample', sample: s })
+    this.emit('sample', s)
+    return s
+  }
+
+  getHint (peerId) {
+    const s = this._samples.get(peerId)
+    if (!s) return { sendRateBps: this.baseRateBps }
+    const factor = Math.max(0.1, 1 - s.loss - (s.rttMs / 1000) * 0.1)
+    return { sendRateBps: Math.floor(this.baseRateBps * factor), rttMs: s.rttMs, loss: s.loss }
+  }
+
+  shouldThrottle (peerId) {
+    const h = this.getHint(peerId)
+    return h.sendRateBps < this.baseRateBps * 0.5
+  }
+
+  getStats () { return { ...this._stats, peers: this._samples.size } }
+
+  async ready () {
+    if (this.swarm || !this.topic) return this
+    await initModuleSwarm(this, {
+      keyPair: this.keyPair, topic: this.topic, protocol: PROTOCOL,
+      onmessage: (data) => {
+        if (data?.type === 'congestion-sample' && data.sample) {
+          const cur = this._samples.get(data.sample.peerId)
+          if (!cur || data.sample.at >= cur.at) this._samples.set(data.sample.peerId, data.sample)
+        }
+      }
+    })
+    return this
+  }
+
+  async close () {
+    if (this.swarm) await this.swarm.destroy().catch(() => {})
+    this.swarm = null
+    this._samples.clear()
+    this.emit('closed')
+  }
+}
+module.exports = { HyperP2PCongestionSignal, PROTOCOL }

network-stack/hyper-p2p-congestion-signal/package.json

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+{
+  "name": "hyper-p2p-congestion-signal",
+  "version": "0.3.1",
+  "description": "Gossip RTT/loss samples and recommended send rates.",
+  "main": "index.js",
+  "type": "commonjs",
+  "license": "Apache-2.0",
+  "scripts": { "test": "brittle-bare test/test.js" },
+  "dependencies": {
+    "bare-events": "^2.8.0",
+    "bare-process": "^4.4.0",
+    "bare-timers": "^2.0.0",
+    "b4a": "^1.6.7",
+    "hypercore-crypto": "^3.0.0",
+    "protomux": "^3.0.0",
+    "compact-encoding": "^2.0.0"
+  },
+  "peerDependencies": { "hyperswarm": "^4.0.0", "bare": ">=1.0.0" },
+  "devDependencies": { "brittle": "^3.0.0" },
+  "imports": {
+    "process": { "bare": "bare-process", "default": "process" },
+    "events": { "bare": "bare-events", "default": "events" },
+    "timers": { "bare": "bare-timers", "default": "timers" }
+  }
+}

network-stack/hyper-p2p-congestion-signal/test/test.js

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+require('bare-process/global')
+const test = require('brittle')
+const { HyperP2PCongestionSignal } = require('../index.js')
+
+test('hyper-p2p-congestion-signal: basic operation', async (t) => {
+  const m = new HyperP2PCongestionSignal()
+  m.reportSample('p1', 50, 0.1)
+  t.ok(m.getHint('p1').sendRateBps > 0)
+  await m.close()
+})
+
+test('hyper-p2p-congestion-signal: validation', async (t) => {
+  const m = new HyperP2PCongestionSignal()
+  try {
+    m.reportSample(null, -1, 0)
+    t.fail('expected throw')
+  } catch (e) {
+    t.ok(e instanceof Error)
+  }
+  await m.close()
+})
+
+test('hyper-p2p-congestion-signal: getStats', async (t) => {
+  const m = new HyperP2PCongestionSignal()
+  const s = m.getStats()
+  t.ok(s)
+  await m.close()
+})
+
+test('hyper-p2p-congestion-signal: close idempotent', async (t) => {
+  const m = new HyperP2PCongestionSignal()
+  await m.close()
+  await m.close()
+  t.pass()
+})