diff --git a/website/blog/quantum_pd.mdx b/website/blog/quantum_pd.mdx index c891f5e55..0ab5ae163 100644 --- a/website/blog/quantum_pd.mdx +++ b/website/blog/quantum_pd.mdx @@ -9,37 +9,37 @@ description: An example where the quantum prisoner's dilemma hands you a ready-m import QuantumPDCircuit from "../components/blog/QuantumPDCircuit"; -Over the last year, I really enjoyed diving a bit deeper into the prisoner's dilemma. Working through its quantum version, I stumbled onto something that has made me curious: the quantum construction hands you a full-blown *institution* — the kind of enforcement mechanism economists usually have to invent by hand. -That made me wonder whether quantum game theory might be a way to *generate* institutions: to find the enforcement rules that turn a cooperation problem around. +Over the last year, I really enjoyed diving a bit deeper into the prisoner's dilemma. Working through its quantum version, I stumbled onto something that has made me curious: the quantum construction hands you a full-blown _institution_ — the kind of enforcement mechanism economists usually have to invent by hand. +That made me wonder whether quantum game theory might be a way to _generate_ institutions: to find the enforcement rules that turn a cooperation problem around. What follows is the one clean example that got me thinking this way. Spoiler alert: It only motivates the question. It does not answer it in any way. ## The basics of the prisoner's dilemma -I already wrote a full post on the [prisoner's dilemma](/blog/13/) with Walter White and Jesse Pinkman, so here is a quick summary with the essential information that matters for this post. +I already wrote a full post on the [prisoner's dilemma](/blog/13/) with Walter White and Jesse Pinkman, so here is a quick summary with the essential information that matters for this post. Jesse and Walter have been arrested and are interrogated separately, each offered the same deal: betray your partner and testify for immunity, or stay loyal and say nothing. The sentences follow from both choices: -- Both stay loyal: 3 years each. -- Both betray: 5 years each. +- Both stay loyal: 3 years each. +- Both betray: 5 years each. - But if one betrays while the other stays loyal, the betrayer walks free while the loyal partner takes 15 years. -That last outcome is the crux of the dilemma. Whatever your partner does, betraying looks better — so both betray, and both end up worse off than if they had trusted each other. +That last outcome is the crux of the dilemma. Whatever your partner does, betraying looks better — so both betray, and both end up worse off than if they had trusted each other. -This leaves the question: what would it take to make loyalty the rational choice? +This leaves the question: what would it take to make loyalty the rational choice? ## What an institution could look like here -The economics literature keeps returning to the same answer: an **institution** the players route their decisions through instead of acting in isolation. +The economics literature keeps returning to the same answer: an **institution** the players route their decisions through instead of acting in isolation. This institution is the thing we will get directly from quantum physics later. The institution does two things, and both are essential: -- First, it couples Jesse's and Walter's choices: rather than chatting freely, each player submits a single move, and the institution links the two by a rule fixed in advance. -- Second, it enforces that rule — whatever it dictates becomes the sentence, with no appeal. +- First, it couples Jesse's and Walter's choices: rather than chatting freely, each player submits a single move, and the institution links the two by a rule fixed in advance. +- Second, it enforces that rule — whatever it dictates becomes the sentence, with no appeal. -In our version of the prisoner's dilemma we can give this institution a face: **Saul Goodman**, the dirty lawyer both Walter and Jesse hire. A client who testifies brings the whole operation down, Saul included — so he has every reason to make loyalty each man's best move. And here is how he gets Jesse and Walter to cooperate. +In our version of the prisoner's dilemma we can give this institution a face: **Saul Goodman**, the dirty lawyer both Walter and Jesse hire. A client who testifies brings the whole operation down, Saul included — so he has every reason to make loyalty each man's best move. And here is how he gets Jesse and Walter to cooperate. -Being the thorough lawyer he is, Saul drafts *two* sworn statements for each client well before the interrogations: one that denies everything, and one that blames the other man. Each client's statements sit in the defense file as a small stack — the denial on top to start — and only the top statement gets filed. +Being the thorough lawyer he is, Saul drafts _two_ sworn statements for each client well before the interrogations: one that denies everything, and one that blames the other man. Each client's statements sit in the defense file as a small stack — the denial on top to start — and only the top statement gets filed. Each client privately leaves Saul one standing instruction for what to do with his stack; Saul carries it out, files whatever ends up on top, and the court hands down the sentences by the original deal. The two men never speak — everything routes through Saul. Saul gives Jesse and Walter a choice of three instructions for what to do with the stacks: @@ -53,9 +53,9 @@ That "flip both" instruction is the whole trick, and it is worth playing with. B -The logic of **Flip both** is worth tracing. If you flip both and your partner betrays, your instruction undoes their flip and lands on your own stack instead — the filed statements show *you* testifying and *them* denying everything, so you take the immunity and walk while they take the 15 years. If you both flip both, every stack is flipped twice and the file stays at mutual denial: three years each. +The logic of **Flip both** is worth tracing. If you flip both and your partner betrays, your instruction undoes their flip and lands on your own stack instead — the filed statements show _you_ testifying and _them_ denying everything, so you take the immunity and walk while they take the 15 years. If you both flip both, every stack is flipped twice and the file stays at mutual denial: three years each. -Now look at what happened to the trap. Against a partner who flips both, betraying is punished automatically — you jump straight to 15 years. So neither player wants to deviate from *both flipping both*: that gives each of them just 3 years, while going loyal drops you to the 5-year mutual-betrayal outcome and betraying costs you 15. Mutual loyalty has become the stable, self-interested choice. +Now look at what happened to the trap. Against a partner who flips both, betraying is punished automatically — you jump straight to 15 years. So neither player wants to deviate from _both flipping both_: that gives each of them just 3 years, while going loyal drops you to the 5-year mutual-betrayal outcome and betraying costs you 15. Mutual loyalty has become the stable, self-interested choice. So we have, by hand, designed an institution — Saul's file, the "flip both" option, and the enforcement that comes with it — that turns the dilemma around. Hold onto that construction; the next section shows you where I got the idea for this institution. @@ -64,16 +64,16 @@ So we have, by hand, designed an institution — Saul's file, the "flip both" op At this stage you can make a connection that still strikes me as fairly surprising. The exact game we just described is also known, in a completely different language, to the quantum-physics community as the [Eisert–Wilkens–Lewenstein](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.83.3077) prisoner's dilemma. In this case, the picture above is just a **quantum circuit**. The two lines are two qubits. The mediator's bracket is the entangling operations $\hat{J}$ (before) and $\hat{J}^\dagger$ (after). The three moves are single-qubit gates: staying loyal is doing nothing, Betray is a bit-flip of your own qubit — and **Flip both, remarkably, is a phase-flip of your own qubit alone** — in quantum language it is named $\hat{Q}$: entanglement carries the local action onto both. -[Van Enk & Pike, *Physical Review A*, 2002](https://journals.aps.org/pra/abstract/10.1103/PhysRevA.66.024306) pointed out that, once you restrict to these three moves, the quantum game carries no more than the classical mediated game does — a slightly disappointing observation for physics, but exactly the bridge I want: it says the quantum construction and Saul's institution are the same object. +[Van Enk & Pike, _Physical Review A_, 2002](https://journals.aps.org/pra/abstract/10.1103/PhysRevA.66.024306) pointed out that, once you restrict to these three moves, the quantum game carries no more than the classical mediated game does — a slightly disappointing observation for physics, but exactly the bridge I want: it says the quantum construction and Saul's institution are the same object. -And here is the part I find genuinely striking. We had to *design* Saul's institution — the two-statement file, the "flip both" move, the enforcement — by hand and with some care. In the quantum version almost none of that is extra work: once you write down the standard entangling operation and the natural set of one-qubit moves, the whole enforced game — Saul's institution and all — is already implicit. The physicists still made choices, of course (which entangling operation, which moves to allow), but nobody had to invent Saul as external enforcement; it comes with the machinery. The entanglement plays the role of Saul's sealed file: it correlates the two moves and carries the punishment. +And here is the part I find genuinely striking. We had to _design_ Saul's institution — the two-statement file, the "flip both" move, the enforcement — by hand and with some care. In the quantum version almost none of that is extra work: once you write down the standard entangling operation and the natural set of one-qubit moves, the whole enforced game — Saul's institution and all — is already implicit. The physicists still made choices, of course (which entangling operation, which moves to allow), but nobody had to invent Saul as external enforcement; it comes with the machinery. The entanglement plays the role of Saul's sealed file: it correlates the two moves and carries the punishment. ## Connecting the dots and outlook -Let me put this curiosity into perspective. What we have is *one* worked-out example. And in this two-player case it is, frankly, not all that new: the quantum approach did not buy anything completely unknown — Saul got there first, with a folder and a filing deadline. -Here the institution was easy enough to design by hand, so watching physics regenerate it is a nice check but no great help. The prize would be a problem where the institution is *hard* to find — and where you could roll out the quantum formulation and have a candidate mechanism fall out. -That is the real question I like: **Is quantum game theory a way to *generate* institutions, especially for cooperation problems where we don't already know the answer?** +Let me put this curiosity into perspective. What we have is _one_ worked-out example. And in this two-player case it is, frankly, not all that new: the quantum approach did not buy anything completely unknown — Saul got there first, with a folder and a filing deadline. +Here the institution was easy enough to design by hand, so watching physics regenerate it is a nice check but no great help. The prize would be a problem where the institution is _hard_ to find — and where you could roll out the quantum formulation and have a candidate mechanism fall out. +That is the real question I like: **Is quantum game theory a way to _generate_ institutions, especially for cooperation problems where we don't already know the answer?** -An obvious next step is the tragedy of the commons — the many-player version I explored in [an earlier post](/blog/14/). It is tempting, but much harder. With many players and several options each, every move interacts with many others at once — the tidy two-wire picture becomes a whole grid of coupled pieces with no clean "flip both", something more like a lattice of interacting spins — and I have no idea whether the elegant result here carries over; I could not find literature that settles it. +An obvious next step is the tragedy of the commons — the many-player version I explored in [an earlier post](/blog/14/). It is tempting, but much harder. With many players and several options each, every move interacts with many others at once — the tidy two-wire picture becomes a whole grid of coupled pieces with no clean "flip both", something more like a lattice of interacting spins — and I have no idea whether the elegant result here carries over; I could not find literature that settles it. -If you have thought about this — whether the quantum formalism can actually *produce* institutions for hard cooperation problems, or whether the two-player tidiness is where it ends — I would genuinely love to hear from you. +If you have thought about this — whether the quantum formalism can actually _produce_ institutions for hard cooperation problems, or whether the two-player tidiness is where it ends — I would genuinely love to hear from you. diff --git a/website/components/AgentChecker.tsx b/website/components/AgentChecker.tsx new file mode 100644 index 000000000..630f2ad1d --- /dev/null +++ b/website/components/AgentChecker.tsx @@ -0,0 +1,129 @@ +/** + * AgentChecker — a diagnostic for the "Build Your Own Agent" page. + * + * Paste an endpoint URL → runs the exact llm/v1 compatibility checks the assistant applies + * (via `checkLlmV1Agent`) and shows every step's pass/fail/warn with a fix hint. Purely + * diagnostic: no wallet, no payment, no "use this agent" — unlike the payment-focused + * AgentSelector used in the chat sidebar. + */ +import React, { useState } from "react"; +import { css } from "../styled-system/css"; +import { checkLlmV1Agent, type CheckReport, type CheckStatus } from "../hooks/x402Discovery"; + +const ICON: Record = { pass: "✅", fail: "❌", warn: "⚠️" }; +const COLOR: Record = { pass: "green.700", fail: "red.600", warn: "amber.700" }; + +const inputStyle = css({ + flex: "1", + minWidth: "0", + fontSize: "sm", + px: "3", + py: "2", + border: "1px solid", + borderColor: "gray.300", + borderRadius: "md", + _focus: { outline: "none", borderColor: "brand" }, +}); + +const buttonStyle = css({ + px: "4", + py: "2", + fontSize: "sm", + fontWeight: "medium", + bg: "brand", + color: "white", + borderRadius: "md", + cursor: "pointer", + _hover: { bg: "blue.700" }, + _disabled: { opacity: 0.5, cursor: "not-allowed" }, +}); + +export function AgentChecker() { + const [url, setUrl] = useState(""); + const [checking, setChecking] = useState(false); + const [report, setReport] = useState(null); + + const run = async () => { + const trimmed = url.trim(); + if (!trimmed || checking) return; + setChecking(true); + setReport(null); + try { + setReport(await checkLlmV1Agent(trimmed)); + } finally { + setChecking(false); + } + }; + + return ( +
+
+ setUrl(e.target.value)} + onKeyDown={(e) => { + if (e.key === "Enter") { + e.preventDefault(); + void run(); + } + }} + disabled={checking} + className={inputStyle} + /> + +
+ + {report && ( +
+
+ {report.ok + ? "✅ Compatible — the assistant could use this endpoint." + : "❌ Not yet compatible — see below."} +
+
    + {report.steps.map((step) => ( +
  • + + {ICON[step.status]} + + + {step.label} + + {step.detail} + + +
    • + ))} +
+

+ The checks run from your browser, so a failure can also mean CORS: your endpoint must send{" "} + Access-Control-Allow-Origin and expose the{" "} + Payment-Required header. +

+
+ )} +
+ ); +} + +export default AgentChecker; diff --git a/website/components/AgentSelector.tsx b/website/components/AgentSelector.tsx index 925bd3c41..85fc6330c 100644 --- a/website/components/AgentSelector.tsx +++ b/website/components/AgentSelector.tsx @@ -26,6 +26,13 @@ export interface AgentSelectorProps { const rowStyle = css({ display: "flex", gap: "2", flexWrap: "wrap", alignItems: "center", mt: "2" }); const monoStyle = css({ fontFamily: "mono", fontSize: "xs", color: "gray.600", wordBreak: "break-all" }); const errorStyle = css({ fontSize: "xs", color: "red.600", mt: "1" }); +const hintStyle = css({ mt: "2" }); +const hintLinkStyle = css({ + fontSize: "xs", + color: "brand", + textDecoration: "none", + _hover: { textDecoration: "underline" }, +}); const inputStyle = css({ width: "100%", fontSize: "xs", @@ -96,6 +103,12 @@ export function AgentSelector({ {checkState === "error" && checkError &&
{checkError}
} + {/* This box is exactly where someone wonders how to get their own agent here. */} +
+ + How to bring your own agent → + +
)} diff --git a/website/components/AssistantChat.tsx b/website/components/AssistantChat.tsx index 97c1e7a6b..822238ce9 100644 --- a/website/components/AssistantChat.tsx +++ b/website/components/AssistantChat.tsx @@ -7,6 +7,7 @@ import React, { useState, useMemo, useEffect } from "react"; import { AgentInfoPanel } from "./AgentInfoPanel"; +import { AgentSelector } from "./AgentSelector"; import * as styles from "../layouts/styles"; import { useLocale } from "../hooks/useLocale"; import { useUmami } from "../hooks/useUmami"; @@ -14,14 +15,13 @@ import { css } from "../styled-system/css"; import { useWalletConnection } from "../hooks/useWalletConnection"; import { useAutoNetwork } from "../hooks/useAutoNetwork"; import { useX402Chat, DEFAULT_LLM_AGENT_URL } from "../hooks/useX402Chat"; -import { fetchAgentCard, type AgentCard } from "../hooks/x402Discovery"; +import { fetchAgentCard, precheckLlmV1Agent, type AgentCard } from "../hooks/x402Discovery"; import { getViemChain } from "@fretchen/chain-utils"; -// The multi-agent picker / custom-URL escape hatch (AgentSelector) is intentionally NOT -// rendered yet — see open_agent_platform_plan.md. Today the only llm/v1-compatible agent is -// ours, so a "use a different agent" box would point at an empty room. AgentSelector.tsx, -// x402Discovery's precheckLlmV1Agent, and useX402Chat's agentUrl param are kept ready for -// when llm/v2 (OpenAI chat shape) makes third-party agents actually compatible. +// The custom-URL escape hatch (AgentSelector) lets the chat pay any llm/v1 agent. It is also +// the only ready-made batch-settlement client there is, so it doubles as the end-to-end test +// for anyone following the build guide at /agent-onboarding. A curated picker (rather than a +// URL box) waits until there are enough compatible agents to be worth listing. interface ChatMessage { role: "user" | "assistant"; @@ -80,7 +80,15 @@ export function AssistantChat() { const { isConnected, connectWallet } = useWalletConnection(); const { network, switchIfNeeded, switchError } = useAutoNetwork(CHAT_NETWORKS); - const { sendMessage: payAndSend, paymentReceipt } = useX402Chat(network); + // A custom agent, once one has been pre-checked and accepted. Null = the default agent. + const [customUrl, setCustomUrl] = useState(null); + const [customCard, setCustomCard] = useState(null); + const [customUrlInput, setCustomUrlInput] = useState(""); + const [checkState, setCheckState] = useState<"idle" | "checking" | "error">("idle"); + const [checkError, setCheckError] = useState(null); + + const agentUrl = customUrl ?? DEFAULT_LLM_AGENT_URL; + const { sendMessage: payAndSend, paymentReceipt } = useX402Chat(network, agentUrl); // Provenance of the agent actually serving this chat (operator + payTo + origin), read // live from its own /openapi.json + 402 so the sidebar can honestly show who the user pays. @@ -95,6 +103,36 @@ export function AssistantChat() { }; }, []); + // The card shown (and paid) is the custom agent's whenever one is selected. + const activeCard = customCard ?? agentCard; + + const tryCustomAgent = async () => { + const url = customUrlInput.trim(); + if (!url) return; + setCheckState("checking"); + setCheckError(null); + const result = await precheckLlmV1Agent(url); + if (!result.ok) { + setCheckState("error"); + setCheckError(result.reason ?? "This agent is not compatible."); + return; + } + setCheckState("idle"); + setCustomUrl(url); + setCustomCard(result.card ?? null); + setMessages([]); + trackEvent("assistant-v2-custom-agent-selected"); + }; + + const useDefaultAgent = () => { + setCustomUrl(null); + setCustomCard(null); + setCustomUrlInput(""); + setCheckState("idle"); + setCheckError(null); + setMessages([]); + }; + const buttonState = useMemo(() => { if (!isConnected) return "connect"; if (isLoading) return "loading"; @@ -207,7 +245,16 @@ export function AssistantChat() { {/* Agent Info Section */}

Agent

- + + void tryCustomAgent()} + onUseDefaultAgent={useDefaultAgent} + />
)} @@ -291,7 +338,20 @@ export function AssistantChat() { {/* Agent Info - Mobile Footer */} - {isMobile && } + {isMobile && ( + <> + + void tryCustomAgent()} + onUseDefaultAgent={useDefaultAgent} + /> + + )} diff --git a/website/components/CodeBlock.tsx b/website/components/CodeBlock.tsx new file mode 100644 index 000000000..2ae60c496 --- /dev/null +++ b/website/components/CodeBlock.tsx @@ -0,0 +1,122 @@ +/** + * CodeBlock — the shared docs code block: syntax-highlighted, copyable. + * + * Highlighting runs through highlight.js's *core* build with only the three languages we + * actually use registered. The full `highlight.js` bundle registers ~190 grammars and would + * push a client chunk past the 700 kB ceiling enforced by utils/checkChunkSizes.ts — never + * import the default entry point here. + * + * Highlighting is synchronous, so it also runs during SSR: the server-rendered HTML already + * carries the .hljs-* markup. That avoids both a flash of unhighlighted code and a hydration + * mismatch, which is why this is preferred over an async highlighter for these pages. + * + * Visual treatment matches the dark blocks on pages/x402 (#1e1e1e / sm type), so that page + * can adopt this component later without any visual change. + */ +import React, { useCallback, useEffect, useRef, useState, useSyncExternalStore } from "react"; +import hljs from "highlight.js/lib/core"; +import typescript from "highlight.js/lib/languages/typescript"; +import json from "highlight.js/lib/languages/json"; +import bash from "highlight.js/lib/languages/bash"; +import "highlight.js/styles/vs2015.css"; +import { css } from "../styled-system/css"; + +hljs.registerLanguage("typescript", typescript); +hljs.registerLanguage("json", json); +hljs.registerLanguage("bash", bash); + +/** `plaintext` opts out of highlighting — use it for terminal transcripts and annotated output. */ +export type CodeLang = "typescript" | "json" | "bash" | "plaintext"; + +const wrapper = css({ position: "relative", mt: "1", mb: "2" }); + +const block = css({ + bg: "#1e1e1e", + color: "#d4d4d4", + p: "4", + borderRadius: "8px", + overflowX: "auto", + fontSize: "sm", + lineHeight: "1.5", + whiteSpace: "pre", + // The global `pre` rule in layouts/panda.css sets a light background; win over it here. + "& code": { bg: "transparent", p: "0", fontSize: "inherit", color: "inherit" }, +}); + +const copyButton = css({ + position: "absolute", + top: "2", + right: "2", + px: "2", + py: "1", + fontSize: "xs", + fontFamily: "sans", + color: "#d4d4d4", + bg: "rgba(255,255,255,0.1)", + border: "1px solid rgba(255,255,255,0.2)", + borderRadius: "sm", + cursor: "pointer", + opacity: 0.7, + transition: "opacity 0.15s ease, background 0.15s ease", + _hover: { opacity: 1, bg: "rgba(255,255,255,0.18)" }, + _focusVisible: { opacity: 1, outline: "2px solid", outlineColor: "brand", outlineOffset: "1px" }, +}); + +export interface CodeBlockProps { + children: string; + lang?: CodeLang; +} + +/** + * Clipboard availability, read the hydration-safe way: the server snapshot is always false + * (no navigator there), so the SSR markup and the first client render agree, and React + * re-renders with the real value straight after hydration. + */ +const subscribeNoop = () => () => {}; +const clipboardAvailable = () => typeof navigator !== "undefined" && !!navigator.clipboard; +const clipboardUnavailableOnServer = () => false; + +export function CodeBlock({ children, lang = "typescript" }: CodeBlockProps) { + const [copied, setCopied] = useState(false); + const canCopy = useSyncExternalStore(subscribeNoop, clipboardAvailable, clipboardUnavailableOnServer); + const timer = useRef | null>(null); + + useEffect( + () => () => { + if (timer.current) clearTimeout(timer.current); + }, + [], + ); + + const copy = useCallback(() => { + void navigator.clipboard.writeText(children).then( + () => { + setCopied(true); + if (timer.current) clearTimeout(timer.current); + timer.current = setTimeout(() => setCopied(false), 2000); + }, + (err) => console.error("Copy failed", err), + ); + }, [children]); + + const highlighted = lang === "plaintext" ? null : hljs.highlight(children, { language: lang }).value; + + return ( +
+ 
+        {highlighted === null ? (
+          {children}
+        ) : (
+          
+        )}
+
+ {canCopy && ( + + )} +
+ ); +} + +export default CodeBlock; diff --git a/website/components/Foldable.tsx b/website/components/Foldable.tsx new file mode 100644 index 000000000..8a160ca3f --- /dev/null +++ b/website/components/Foldable.tsx @@ -0,0 +1,50 @@ +/** + * Foldable — a plain
/ disclosure. + * + * Used on documentation pages so a long build guide skims as a checklist but expands into + * full code snippets. No JS state: native
keeps it accessible and SSR-safe. + */ +import React from "react"; +import { css } from "../styled-system/css"; + +const wrapper = css({ + mb: "3", + border: "1px solid token(colors.border, #e5e7eb)", + borderRadius: "md", + overflow: "hidden", +}); + +// The closed state is the one that has to read as a control, so tint the summary rather than +// the whole wrapper — an expanded snippet then sits on the page ground, not in a second box. +const summary = css({ + px: "3", + py: "2", + fontSize: "sm", + fontWeight: "medium", + color: "brand", + bg: "gray.50", + cursor: "pointer", + userSelect: "none", + _hover: { bg: "gray.100" }, +}); + +const body = css({ px: "3", pb: "3", pt: "1" }); + +export interface FoldableProps { + /** Summary line, e.g. "Show the code". */ + label: string; + /** Open on first render (use sparingly — the point is a skimmable page). */ + defaultOpen?: boolean; + children: React.ReactNode; +} + +export function Foldable({ label, defaultOpen = false, children }: FoldableProps) { + return ( +
+ {label} +
{children}
+
+ ); +} + +export default Foldable; diff --git a/website/components/MermaidDiagram.tsx b/website/components/MermaidDiagram.tsx index c69546f3e..e91d74c86 100644 --- a/website/components/MermaidDiagram.tsx +++ b/website/components/MermaidDiagram.tsx @@ -1,6 +1,13 @@ -import React, { useRef, useEffect } from "react"; +import React, { useRef, useEffect, useMemo } from "react"; import { css } from "../styled-system/css"; +/** + * Sequence-diagram defaults. `mirrorActors` defaults to true in mermaid, which redraws the + * entire participant row again at the bottom of the diagram — on these pages that is ~75px + * of dead whitespace, since the labels are already visible at the top. + */ +const SEQUENCE_DEFAULTS = { mirrorActors: false }; + interface MermaidDiagramProps { /** The mermaid diagram definition string */ definition: string; @@ -12,9 +19,36 @@ interface MermaidDiagramProps { config?: Record; } -const MermaidDiagram: React.FC = ({ definition, title, className, config = {} }) => { +const MermaidDiagram: React.FC = ({ definition, title, className, config }) => { const mermaidRef = useRef(null); + // Callers pass `config` as an inline object literal, which is a fresh reference on every + // render — depending on it directly would re-render the diagram on every parent render. + // Key the effect on its serialized form instead. + const configKey = config ? JSON.stringify(config) : ""; + + const resolvedConfig = useMemo(() => { + const caller = (configKey ? (JSON.parse(configKey) as unknown) : {}) as Record; + return { + startOnLoad: false, + theme: "default" as const, + // "strict" (mermaid's own default), NOT "sandbox". Under "sandbox" mermaid returns an + //