From 709b8d69e2928d33b879de533f43bdaa26c008e2 Mon Sep 17 00:00:00 2001 From: Yilin Jing Date: Thu, 17 Sep 2026 12:45:02 -0400 Subject: [PATCH 01/59] canvas: run Claude Code from the dev server, with its output kept per run Three routes under /__sp/agent/run: POST starts one `claude -p` in the user's project and answers 202 with a run id; GET :id/events?after=N is a server-sent event stream of everything after N, replayed from what the server kept and then live; POST :id/cancel stops it. Two steps rather than one streaming response because a board the agent writes reloads the page through the watcher, and a stream bound to the starting fetch would die exactly when the run succeeds. claudeStream.ts reduces the CLI's stream-json frames to text, a thinking marker, tool calls with their results, and the end; its tests run against recordings of Claude Code 2.1.274 with the flags the server spawns. agentRun.ts is the per-run event log and its attach/replay, node-free so vitest covers it. The agent's cwd is the user's project, which the server learns from PROTOTYPING_PROJECT_DIR; sp-canvas start sets it to the directory it is started from, and without it the routes answer 503 by name. Co-Authored-By: Claude Opus 5 --- canvas/src/agentRun.test.ts | 42 +++++ canvas/src/agentRun.ts | 50 ++++++ canvas/src/claudeStream.test.ts | 41 +++++ canvas/src/claudeStream.ts | 94 ++++++++++ .../src/fixtures/claude-2.1.274-say-hi.jsonl | 24 +++ .../fixtures/claude-2.1.274-write-file.jsonl | 70 ++++++++ canvas/vite.config.ts | 168 ++++++++++++++++++ tools/sp_canvas.py | 8 +- 8 files changed, 496 insertions(+), 1 deletion(-) create mode 100644 canvas/src/agentRun.test.ts create mode 100644 canvas/src/agentRun.ts create mode 100644 canvas/src/claudeStream.test.ts create mode 100644 canvas/src/claudeStream.ts create mode 100644 canvas/src/fixtures/claude-2.1.274-say-hi.jsonl create mode 100644 canvas/src/fixtures/claude-2.1.274-write-file.jsonl diff --git a/canvas/src/agentRun.test.ts b/canvas/src/agentRun.test.ts new file mode 100644 index 00000000..c75b3edc --- /dev/null +++ b/canvas/src/agentRun.test.ts @@ -0,0 +1,42 @@ +import { describe, expect, it } from 'vitest' +import { attach, emit, ended, newRun, sseFrame } from './agentRun' + +describe('attach', () => { + it('replays from the cursor, then follows, until detached', () => { + const run = newRun('r1') + emit(run, 'text', { text: 'a' }) + emit(run, 'text', { text: 'b' }) + const seen: number[] = [] + const detach = attach(run, 1, (e) => seen.push(e.id)) + expect(seen).toEqual([2]) + emit(run, 'text', { text: 'c' }) + expect(seen).toEqual([2, 3]) + detach() + emit(run, 'end', { ok: true }) + expect(seen).toEqual([2, 3]) + expect(ended(run)).toBe(true) + }) + + it('gives a fresh page the whole run from zero', () => { + const run = newRun('r2') + emit(run, 'text', { text: 'a' }) + emit(run, 'end', { ok: true }) + const seen: string[] = [] + attach(run, 0, (e) => seen.push(e.event)) + expect(seen).toEqual(['text', 'end']) + }) + + it('refuses an event after the end', () => { + const run = newRun('r3') + emit(run, 'end', { ok: false, message: 'stopped' }) + expect(() => emit(run, 'text', { text: 'late' })).toThrow(/has ended/) + }) +}) + +describe('sseFrame', () => { + it('writes id, event and json data', () => { + expect(sseFrame({ id: 7, event: 'text', data: { text: 'hi\n' } })).toBe( + 'id: 7\nevent: text\ndata: {"text":"hi\\n"}\n\n', + ) + }) +}) diff --git a/canvas/src/agentRun.ts b/canvas/src/agentRun.ts new file mode 100644 index 00000000..cc81e3b1 --- /dev/null +++ b/canvas/src/agentRun.ts @@ -0,0 +1,50 @@ +/** + * A run of the agent as the dev server keeps it: everything the process has said, numbered from + * one, and the open event streams to say the next thing down. + * + * The events are kept whole rather than windowed, because the page that asks for them may be a + * fresh one. The agent's work is a board written to disk, and the watcher answers that with a full + * reload; the panel that comes back has nothing but the run's id, and rebuilds its transcript by + * reading from event zero. A stream that reconnects mid-run asks from the last id it saw instead. + * Either way the answer is a slice of the same array, which is why an id is just a position. + * + * A turn is some kilobytes of text and the server forgets old runs, so nothing here bounds one. + * Kept free of node APIs so it can be tested without a dev server, the way boardStatusEdit.ts is; + * the process itself lives in vite.config.ts. + */ +export interface RunEvent { + id: number; + event: string; + data: unknown; +} + +export interface Run { + id: string; + events: RunEvent[]; + clients: Set<(e: RunEvent) => void>; +} + +export const newRun = (id: string): Run => ({ id, events: [], clients: new Set() }); + +/** `end` is the one terminal event: a run whose last event it is has nothing more to say. */ +export const ended = (run: Run) => run.events.at(-1)?.event === "end"; + +/** Records an event and hands it to every open stream. */ +export function emit(run: Run, event: string, data: unknown): RunEvent { + if (ended(run)) throw new Error(`run ${run.id} has ended; got a ${event} event after its end`); + const e = { id: run.events.length + 1, event, data }; + run.events.push(e); + for (const client of run.clients) client(e); + return e; +} + +/** Replays every event after `cursor` into `sink`, then every event to come, until detached. */ +export function attach(run: Run, cursor: number, sink: (e: RunEvent) => void): () => void { + for (const e of run.events.slice(cursor)) sink(e); + run.clients.add(sink); + return () => run.clients.delete(sink); +} + +/** One event in the text/event-stream wire format; chatTransport.ts reads it back. */ +export const sseFrame = (e: RunEvent) => + `id: ${e.id}\nevent: ${e.event}\ndata: ${JSON.stringify(e.data)}\n\n`; diff --git a/canvas/src/claudeStream.test.ts b/canvas/src/claudeStream.test.ts new file mode 100644 index 00000000..20f553c2 --- /dev/null +++ b/canvas/src/claudeStream.test.ts @@ -0,0 +1,41 @@ +import { describe, expect, it } from 'vitest' +import { chatEventsFromLine } from './claudeStream' +import sayHi from './fixtures/claude-2.1.274-say-hi.jsonl?raw' +import writeFile from './fixtures/claude-2.1.274-write-file.jsonl?raw' + +// Both fixtures are recordings of `claude -p --input-format stream-json --output-format stream-json +// --verbose --include-partial-messages`, the shape vite.config.ts spawns, on Claude Code 2.1.274. +// The hook and init frames had their machine-local payloads cut down and the working directory +// was renamed; every frame is still there, in its recorded order. +const events = (jsonl: string) => jsonl.trim().split('\n').flatMap(chatEventsFromLine) + +describe('chatEventsFromLine', () => { + it('streams the text once and ends on the result frame', () => { + const got = events(sayHi) + const text = got.flatMap((e) => (e.kind === 'text' ? [e.text] : [])).join('') + expect(text).toBe('Hi! πŸ‘‹\n\nWhat are we working on?') + expect(got.at(-1)).toEqual({ kind: 'end', ok: true }) + }) + + it('reports a tool call with its target, then its result', () => { + const got = events(writeFile) + expect(got.map((e) => e.kind)).toEqual(['thinking', 'tool', 'tool_done', 'text', 'end']) + const [, tool, done, text] = got + expect(tool).toEqual({ + kind: 'tool', + id: expect.stringMatching(/^toolu_/), + name: 'Write', + detail: '/home/user/project/hi.txt', + }) + expect(done).toEqual({ kind: 'tool_done', id: (tool as { id: string }).id, ok: true }) + expect(text).toEqual({ kind: 'text', text: 'done' }) + }) + + it('skips a sub-agent frame and says why a run failed', () => { + const subagent = + '{"type":"assistant","parent_tool_use_id":"toolu_1","message":{"content":[{"type":"tool_use","id":"x","name":"Read","input":{}}]}}' + expect(chatEventsFromLine(subagent)).toEqual([]) + const failed = '{"type":"result","subtype":"error_during_execution","is_error":true,"result":"boom"}' + expect(chatEventsFromLine(failed)).toEqual([{ kind: 'end', ok: false, message: 'boom' }]) + }) +}) diff --git a/canvas/src/claudeStream.ts b/canvas/src/claudeStream.ts new file mode 100644 index 00000000..6740482e --- /dev/null +++ b/canvas/src/claudeStream.ts @@ -0,0 +1,94 @@ +/** + * Claude Code's stream-json output, reduced to what the chat panel draws. + * + * `claude -p --output-format stream-json --include-partial-messages` writes one JSON frame per + * line. The panel wants five things out of them: text as it arrives, that the model is thinking, + * each tool call as it starts and when it finishes, and the end of the run. Everything else β€” the + * init frame, hook frames, rate-limit notices, token counts β€” is dropped here. + * + * Text comes only from `stream_event` deltas, never from the `assistant` frame that repeats each + * finished message in full: taking both would print every paragraph twice. Tool calls come only + * from the `assistant` frame, because that is where `input` is complete β€” the deltas carry it as + * JSON fragments. Tool results come from the `user` frame that carries them back. Frames with a + * `parent_tool_use_id` belong to a sub-agent and are skipped whole. + * + * Thinking is a marker, not text: on 2.1.274 every thinking delta arrives with an empty string + * and a token estimate, so there is nothing to show but that it happened. + * + * A run has one terminal frame, `result`, on every build of Claude Code, so it is the only thing + * that ends a turn here. The CLI also reports a `stop_reason`, on a frame that has moved between + * releases; a host that keeps stdin open for further turns has to read it to know when to write + * again. This host closes stdin after the one message, so it does not. + * + * Kept free of node and DOM APIs so the dev server and vitest both import it, and the recorded + * fixtures next to the test are the whole contract. + */ +export type ChatEvent = + | { kind: "text"; text: string } + | { kind: "thinking" } + | { kind: "tool"; id: string; name: string; detail: string } + | { kind: "tool_done"; id: string; ok: boolean } + | { kind: "end"; ok: boolean; message?: string }; + +/** The parts of a frame this reads; the rest of Claude Code's schema stays untyped. */ +interface Frame { + type: string; + subtype?: string; + parent_tool_use_id?: string | null; + event?: { + type: string; + content_block?: { type: string }; + delta?: { type: string; text?: string }; + }; + message?: { content: string | Block[] }; + is_error?: boolean; + result?: string; +} + +type Block = + | { type: "tool_use"; id: string; name: string; input: Record } + | { type: "tool_result"; tool_use_id: string; is_error?: boolean } + | { type: "text" | "thinking" }; + +// ponytail: one line per call from whichever argument names its target; the panel truncates it. +const toolDetail = (input: Record) => + String( + input.file_path ?? input.path ?? input.command ?? input.pattern ?? input.url ?? + input.description ?? input.skill ?? "", + ); + +export function chatEventsFromLine(line: string): ChatEvent[] { + const frame: Frame = JSON.parse(line); + if (frame.parent_tool_use_id) return []; + const blocks = Array.isArray(frame.message?.content) ? frame.message.content : []; + switch (frame.type) { + case "stream_event": { + const e = frame.event!; + if (e.type === "content_block_start" && e.content_block!.type === "thinking") { + return [{ kind: "thinking" }]; + } + if (e.type === "content_block_delta" && e.delta!.type === "text_delta") { + return [{ kind: "text", text: e.delta!.text! }]; + } + return []; + } + case "assistant": + return blocks.flatMap((b) => + b.type === "tool_use" + ? [{ kind: "tool" as const, id: b.id, name: b.name, detail: toolDetail(b.input) }] + : [], + ); + case "user": + return blocks.flatMap((b) => + b.type === "tool_result" + ? [{ kind: "tool_done" as const, id: b.tool_use_id, ok: !b.is_error }] + : [], + ); + case "result": { + const ok = frame.subtype === "success" && !frame.is_error; + return [ok ? { kind: "end", ok } : { kind: "end", ok, message: frame.result || frame.subtype }]; + } + default: + return []; + } +} diff --git a/canvas/src/fixtures/claude-2.1.274-say-hi.jsonl b/canvas/src/fixtures/claude-2.1.274-say-hi.jsonl new file mode 100644 index 00000000..5856e498 --- /dev/null +++ b/canvas/src/fixtures/claude-2.1.274-say-hi.jsonl @@ -0,0 +1,24 @@ +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"b41e3376-ff8f-455c-9036-d8d44d54a9e1"} +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"b41e3376-ff8f-455c-9036-d8d44d54a9e1"} +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"b41e3376-ff8f-455c-9036-d8d44d54a9e1"} 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πŸ‘‹\n\nWhat are we working on?","ttft_ms":2596,"type":"result","duration_ms":4255,"uuid":"11cded5d-80a9-4f2c-a40b-9ed61931f9c1","ttft_stream_ms":1939,"time_to_request_ms":82,"first_content_frame_ms":1940,"queued_turn_count":0,"result_index":0} diff --git a/canvas/src/fixtures/claude-2.1.274-write-file.jsonl b/canvas/src/fixtures/claude-2.1.274-write-file.jsonl new file mode 100644 index 00000000..5536156e --- /dev/null +++ b/canvas/src/fixtures/claude-2.1.274-write-file.jsonl @@ -0,0 +1,70 @@ +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"bc64bfd1-d1ec-4650-ab38-cb4819cd7507"} +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"bc64bfd1-d1ec-4650-ab38-cb4819cd7507"} +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"bc64bfd1-d1ec-4650-ab38-cb4819cd7507"} +{"type":"system","subtype":"hook_started","hook_event":"SessionStart","session_id":"bc64bfd1-d1ec-4650-ab38-cb4819cd7507"} 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diff --git a/canvas/vite.config.ts b/canvas/vite.config.ts index 97f154f8..61763fbe 100644 --- a/canvas/vite.config.ts +++ b/canvas/vite.config.ts @@ -1,3 +1,5 @@ +import { spawn, type ChildProcess } from "node:child_process"; +import { randomUUID } from "node:crypto"; import fs from "node:fs"; import path from "node:path"; import { fileURLToPath } from "node:url"; @@ -14,6 +16,8 @@ import { withCanvasName, } from "./src/boardStatusEdit.ts"; import { boardChangeKind, boardSetSignature, boardSlug } from "./src/boardWatch.ts"; +import { attach, emit, ended, newRun, sseFrame, type Run } from "./src/agentRun.ts"; +import { chatEventsFromLine } from "./src/claudeStream.ts"; /** * Repo root β€” vite.config.ts sits in canvas/, one level below it. It is published into the page @@ -38,6 +42,17 @@ const canvasesDir = path.resolve( process.env.PROTOTYPING_CANVASES_DIR || defaultCanvasesDir, ); +/** + * The user's project, for the agent behind the chat panel to run in. It is their project the + * agent works on β€” the boards are one folder inside it, and a prompt about a screen reaches for + * the code around it β€” so neither the boards directory nor this checkout would do as its cwd. + * `sp-canvas start` sets it to the directory it is started from, the same one the boards default + * under. Unset, the agent endpoints answer 503 by name and the rest of the server is unaffected. + */ +const projectDir = process.env.PROTOTYPING_PROJECT_DIR + ? path.resolve(process.env.PROTOTYPING_PROJECT_DIR) + : null; + /** * Suffix for the tldraw persistence key, so two projects do not share one document. * @@ -694,6 +709,159 @@ function canvasesSource(): Plugin { }); }); + // The agent behind the chat panel: one Claude Code process per message, run in the user's + // project, its output kept here and streamed to the page. Dev server only, like the + // endpoints above and more so, since the process writes files. + // + // Two steps rather than one streaming response: the agent's work is a board written to + // disk, and the watcher below answers that with a full reload, so a stream bound to the + // fetch that started the run would die exactly when the run succeeds. The page comes back + // with the run's id and reads its events from wherever it left off (agentRun.ts). + // + // No reload broadcast from here: a board the agent writes reaches the page through the + // watcher like anyone else's, and anything else it writes is not the canvas's business. + const runs = new Map(); + server.middlewares.use("/__sp/agent/run", (req, res, next) => { + const send = (code: number, message: string) => { + res.statusCode = code; + res.end(message); + }; + const project = projectDir; + if (!project) { + return send( + 503, + "PROTOTYPING_PROJECT_DIR is not set, so there is no project for the agent to work in. " + + "`sp-canvas start` sets it to the directory it is started from.", + ); + } + // Mounted under the prefix, so req.url is "/", "//events?after=N" or "//cancel". + const url = new URL(req.url ?? "/", "http://sp"); + if (req.method === "POST" && url.pathname === "/") { + let body = ""; + req.on("data", (chunk) => (body += chunk)); + req.on("end", () => { + try { + const { message, canvas } = JSON.parse(body || "{}"); + if (typeof message !== "string" || !message.trim()) return send(400, "empty message"); + // The slug lands in a path in the prompt, so it is checked like the others. + if (canvas !== undefined && !SAFE_NAME.test(canvas)) return send(400, "bad canvas name"); + const preamble = [ + `You are working in the user's project at ${project}, from the chat panel of the ` + + "super-prototyping canvas they have open.", + `Their boards are the folders under ${canvasesDir}, one per canvas page.`, + canvas && + `They are looking at the canvas "${canvas}", whose folder is ${path.join(canvasesDir, canvas)}.`, + `Before touching a board folder, read ${repoRoot}/skills/prototype-canvas/SKILL.md, ` + + "the prototype-canvas skill of the super-prototyping plugin: one folder is one canvas " + + "page, one .html file in it is one board, layout.json places them, and the open canvas " + + "reloads by itself when a board is rewritten.", + ] + .filter(Boolean) + .join("\n"); + const run = Object.assign(newRun(randomUUID()), { + child: spawn( + "claude", + [ + "-p", + "--input-format", "stream-json", + "--output-format", "stream-json", + "--verbose", + "--include-partial-messages", + // The same trust as running claude in a terminal of the project, which is + // what the panel replaces; the panel says so before the first message. + "--permission-mode", "bypassPermissions", + "--append-system-prompt", preamble, + ], + { cwd: project, env: process.env }, + ), + }); + runs.set(run.id, run); + // ponytail: the newest 20 runs are kept whatever their age; a tab that reattaches + // to an older one gets a 404 and shows it. + for (const [id, old] of runs) { + if (runs.size <= 20) break; + if (ended(old)) runs.delete(id); + } + const finish = (message: string) => { + if (!ended(run)) emit(run, "end", { kind: "end", ok: false, message }); + }; + let stderr = ""; + run.child.stderr.setEncoding("utf8").on("data", (chunk: string) => (stderr += chunk)); + let pending = ""; + const feed = (chunk: string) => { + const lines = (pending + chunk).split("\n"); + pending = lines.pop()!; + try { + for (const line of lines) { + if (line.trim()) for (const e of chatEventsFromLine(line)) emit(run, e.kind, e); + } + } catch (error) { + run.child.kill(); + finish(`unreadable output from claude: ${error}`); + } + }; + run.child.stdout.setEncoding("utf8").on("data", feed).on("end", () => feed("\n")); + // A CLI that exits at once β€” an older one refusing a flag β€” closes the pipe before + // the prompt is written; the exit below reports that, and the write error is noise. + run.child.stdin.on("error", () => {}); + run.child.stdin.end( + JSON.stringify({ type: "user", message: { role: "user", content: message } }) + "\n", + ); + run.child.on("error", (error: NodeJS.ErrnoException) => + finish( + error.code === "ENOENT" + ? "claude is not on PATH. Install Claude Code, or start sp-canvas from a shell where `claude` runs." + : String(error), + ), + ); + run.child.on("close", (code, signal) => { + if (ended(run)) return; + const tail = stderr.trim().split("\n").slice(-5).join("\n"); + // `claude` is a launcher around the real process: a SIGTERM to it comes back as + // exit 143, not as a signal. + finish( + signal || code === 143 + ? "stopped" + : `claude exited with code ${code}` + + (tail ? `\n${tail}` : "") + + (/unknown option/i.test(stderr) ? "\nThe panel needs Claude Code 2.1.274 or newer." : ""), + ); + }); + res.setHeader("content-type", "application/json"); + send(202, JSON.stringify({ runId: run.id })); + } catch (error) { + send(500, String(error)); + } + }); + return; + } + const match = /^\/([\w-]+)\/(events|cancel)$/.exec(url.pathname); + if (!match) return next(); + const run = runs.get(match[1]); + if (!run) return send(404, "no such run"); + if (match[2] === "events" && req.method === "GET") { + const after = Number(url.searchParams.get("after") ?? 0); + if (!Number.isInteger(after) || after < 0) return send(400, "bad cursor"); + res.writeHead(200, { "content-type": "text/event-stream", "cache-control": "no-store" }); + res.flushHeaders(); + const detach = attach(run, after, (e) => { + res.write(sseFrame(e)); + if (e.event === "end") res.end(); + }); + const keepalive = setInterval(() => res.write(": keepalive\n\n"), 25_000); + res.on("close", () => { + detach(); + clearInterval(keepalive); + }); + return; + } + if (match[2] === "cancel" && req.method === "POST") { + run.child.kill(); + return send(200, ""); + } + next(); + }); + // Every module Vite transformed from this file, dropped, so the next request for it reads // the file again. The same call the status endpoint above makes, and it is effective for a // board exactly as it is for a layout.json. diff --git a/tools/sp_canvas.py b/tools/sp_canvas.py index 8e5c7e79..7ced841d 100644 --- a/tools/sp_canvas.py +++ b/tools/sp_canvas.py @@ -268,7 +268,11 @@ def cmd_start(a): f"`sp-canvas stop` if it is this one." ) - env = dict(os.environ, PROTOTYPING_CANVASES_DIR=str(boards)) + # The project is the directory this is run from β€” the same one the boards default under. + # The canvas's chat panel runs Claude Code in it; without it the panel's endpoints answer 503. + project = Path.cwd().resolve() + env = dict(os.environ, PROTOTYPING_CANVASES_DIR=str(boards), + PROTOTYPING_PROJECT_DIR=str(project)) # --host 127.0.0.1 because Vite otherwise binds localhost only, which can # resolve to ::1 and make every 127.0.0.1 request fail with a bare # connection error. Loopback either way: this is a design tool, not a service. @@ -292,6 +296,7 @@ def cmd_start(a): inline = " ".join([ "env", f"PROTOTYPING_CANVASES_DIR={shlex.quote(str(boards))}", + f"PROTOTYPING_PROJECT_DIR={shlex.quote(str(project))}", f"PATH={shlex.quote(os.environ.get('PATH', ''))}", shlex.join(cmd), ]) @@ -318,6 +323,7 @@ def cmd_start(a): print(f"canvas http://127.0.0.1:{a.port}/") print(f"boards {boards}") + print(f"project {project}") print(f"app {app}") print(f"running {how}") From 77386285080b3c0b9bab8a52b6aa003eadc0725c Mon Sep 17 00:00:00 2001 From: Yilin Jing Date: Thu, 17 Sep 2026 12:45:02 -0400 Subject: [PATCH 02/59] canvas: a chat panel on the left, following its runs across reloads MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ChatPanel.tsx is the inspector's mirror as a flex sibling before the editor: 360px, so tldraw's viewport shrinks by it and every screen-space calculation stays right. Floating was rejected β€” tldraw 5 has a scalar inset and symmetric padding, no asymmetric expression β€” and the comment in index.css now says so. The panel keeps its run ids in sessionStorage and reads each run again from event zero after the reload a board write causes; chatTransport.ts holds the SSE decoding, the reconnect-with-cursor loop and the fold from events into a turn, with tests. One run at a time, Send becomes Stop while it goes, and the empty state says permission prompts are off. Dev server only: App.tsx mounts it under import.meta.env.DEV. Co-Authored-By: Claude Opus 5 --- canvas/src/App.tsx | 3 + canvas/src/ChatPanel.tsx | 162 +++++++++++++++++++++++++++++++ canvas/src/chatTransport.test.ts | 67 +++++++++++++ canvas/src/chatTransport.ts | 124 +++++++++++++++++++++++ canvas/src/index.css | 107 +++++++++++++++++++- 5 files changed, 461 insertions(+), 2 deletions(-) create mode 100644 canvas/src/ChatPanel.tsx create mode 100644 canvas/src/chatTransport.test.ts create mode 100644 canvas/src/chatTransport.ts diff --git a/canvas/src/App.tsx b/canvas/src/App.tsx index dd8e44d1..294ea399 100644 --- a/canvas/src/App.tsx +++ b/canvas/src/App.tsx @@ -47,6 +47,7 @@ import { InspectorPanel, type CanvasImagePick, } from "./InspectorPanel"; +import { ChatPanel } from "./ChatPanel"; import type { InspectorTarget } from "./inspectorClicks"; import { CANVAS_STATUS_BANNER_GAP, @@ -1364,6 +1365,8 @@ export default function App() { }} >
+ {/* Dev server only: the panel talks to /__sp/agent, which a hosted build has no process behind. */} + {import.meta.env.DEV && }
editor?.getCurrentPage().meta.canvasSlug as string | undefined, + [editor], + ); + // The welcome page is drawn by the app and has no folder, so it is no canvas to the agent. + const canvas = slug && slug !== WELCOME_PAGE_SLUG ? slug : undefined; + const [turns, setTurns] = useState(() => { + const saved: Pick[] = JSON.parse( + sessionStorage.getItem(STORAGE_KEY) ?? "[]", + ); + return saved.map((t) => ({ ...t, blocks: [] })); + }); + const [draft, setDraft] = useState(""); + const [sendError, setSendError] = useState(null); + const abort = useRef(new AbortController()); + const log = useRef(null); + + const follow = (runId: string) => { + const { signal } = abort.current; + const update = (patch: (t: Turn) => Turn) => + setTurns((ts) => ts.map((t) => (t.runId === runId ? patch(t) : t))); + followRun(runId, 0, (frame) => update((t) => applyFrame(t, frame)), signal).catch((error) => { + if (!signal.aborted) update((t) => ({ ...t, end: { ok: false, message: String(error) } })); + }); + }; + + useEffect(() => { + abort.current = new AbortController(); + for (const t of turns) follow(t.runId); + return () => abort.current.abort(); + // Mount only: the turns to pick up again are the ones the page came back with. + // oxlint-disable-next-line react-hooks/exhaustive-deps + }, []); + + useEffect(() => { + sessionStorage.setItem( + STORAGE_KEY, + JSON.stringify(turns.map(({ runId, prompt }) => ({ runId, prompt }))), + ); + log.current?.scrollTo(0, log.current.scrollHeight); + }, [turns]); + + const running = turns.find((t) => !t.end); + + const send = async () => { + const message = draft.trim(); + if (!message || running) return; + setDraft(""); + setSendError(null); + const res = await fetch("/__sp/agent/run", { + method: "POST", + headers: { "content-type": "application/json" }, + body: JSON.stringify({ message, canvas }), + }); + if (!res.ok) { + setDraft(message); + return setSendError(await res.text()); + } + const { runId } = await res.json(); + setTurns((ts) => [...ts, { runId, prompt: message, blocks: [] }]); + follow(runId); + }; + + return ( +