[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12},"actionData","errors","root",{"_228":-5,"_231":232,"_233":234},"routes/shell",{"_40":41,"_227":-5,"_228":-5,"_229":230},"routes/repo",{"_33":-7,"_34":35,"_36":37,"_38":39,"_40":41,"_42":31,"_43":31,"_44":31,"_45":31,"_46":31,"_47":31,"_48":49,"_50":49,"_51":31,"_52":-7,"_53":-7,"_54":55,"_56":57,"_58":59,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68},"routes/repo.blob",{"_13":14,"_15":16,"_17":18,"_19":20,"_21":14,"_22":23,"_24":-5,"_25":26,"_27":28,"_28":29,"_30":31,"_32":14},"ref","8b4a1ea2ab6793027ca866e2ddd02828317d8d88","path","apps/server/src/chat/service.ts","oid","7c03be843df954dc6af471ab79f0b6f139f623f0","size",22870,"commit","mounts",[],"source","plain",{"_13":14,"_15":16},"kind","text","/**\n * The conversation.\n *\n * One transcript per room, shared by everyone in it, and one turn at a time.\n * Messages that address the agent are queued rather than refused while it is\n * working: the plan belongs to the agent for the length of a turn, but the\n * conversation does not, and silencing somebody because a colleague prompted\n * first is a poor way to run a room with two people in it.\n *\n * Messages that do not address it are ordinary conversation. They are carried\n * into the next turn as context rather than starting one, so people can decide\n * something between themselves and the agent turns up already knowing.\n *\n * Every message reaching the model is prefixed with its author's handle. The\n * agent is planning with a group, and \"Alice prefers X, but Bob raised Y\" is\n * the kind of thing it has to be able to say back.\n */\n\nimport { ulid } from \"@chopin/dialect\";\n\nimport * as Agent from \"../agent/client\";\nimport { toolbox } from \"../agent/tools\";\nimport * as Service from \"../plan/service\";\nimport { addressed, instruction } from \"@chopin/protocol/address\";\n\nimport { compose, remember } from \"./address\";\nimport { broadcast, tell } from \"../wire\";\n\nimport type { Server } from \"bun\";\nimport type { SessionEvent } from \"@github/copilot-sdk\";\nimport type { Chat as Wire, Request } from \"@chopin/protocol\";\nimport type { Config } from \"../config\";\nimport type { Plan } from \"../plan/service\";\nimport type { Said } from \"./address\";\nimport type { Socket, SocketData } from \"../wire\";\n\n/** Beyond this the queue is a backlog nobody is going to read. */\nconst MAX_QUEUE = 20;\n\n/** How long the agent's cursor stays where it finished, after a turn ends. */\nconst LINGER_MS = 5_000;\n\n/**\n * A queued message, with what the queue needs and clients do not.\n *\n * `spent` is asked, just before the turn would run, whether somebody else has\n * already done the work. It is a function rather than a flag because the answer\n * is only knowable at that moment — and `JSON.stringify` drops it, so the wire\n * shape stays exactly `Wire.Waiting`.\n */\ntype Waiting = Wire.Waiting & {\n\tspent?: () => boolean;\n\t/** True when this came from the composer rather than another instruction. */\n\tmessage?: boolean;\n\t/** The comment thread this turn was started to act on, if one was. */\n\tthread?: string;\n};\n\n/** What a turn other than a message needs to say about itself. */\nexport type Instruction = {\n\tspent?: () => boolean;\n\tthread?: string;\n};\n\nexport type Chat = {\n\tentries: Wire.Entry[];\n\twaiting: Waiting[];\n\t/** The Copilot session, once somebody has prompted. */\n\tagent?: Agent.Agent;\n\t/** In flight while the session is being opened, so a second prompt waits. */\n\topening?: Promise;\n\tbusy: boolean;\n\t/** The transient lifecycle of the running Planner turn. */\n\tturn?: Wire.Turn;\n\t/**\n\t * The comment thread the running turn is acting on.\n\t *\n\t * Read by `edit_plan`, so the prose a turn writes can be recorded as what\n\t * that decision produced even when the agent forgets to say so itself.\n\t */\n\tacting?: string;\n\t/** The entry the agent is currently writing into. */\n\twriting?: string;\n\t/** The dedicated entry collecting tool calls for this turn. */\n\ttooling?: string;\n\t/** Detaches the event handler when a turn ends. */\n\trelease?: () => void;\n\t/** Pending removal of the agent's cursor, cancelled if it edits again. */\n\tlingering?: ReturnType;\n\t/** When each running tool call started, for its duration. */\n\ttimings: Map;\n\t/** Session id, persisted so a restart resumes the conversation. */\n\tresume?: string;\n\t/**\n\t * What the room has said since the agent last ran.\n\t *\n\t * Deliberately not persisted: a conversation the agent never saw has no\n\t * claim on surviving a restart, and replaying it later would be stranger\n\t * than losing it.\n\t */\n\tbackscroll: Said[];\n};\n\nexport function create(): Chat {\n\treturn { entries: [], waiting: [], busy: false, timings: new Map(), backscroll: [] };\n}\n\n/**\n * Come back with what was said before.\n *\n * An entry that was still streaming when the process went away never finished,\n * so the flag is cleared: it is as complete as it is ever going to be, and\n * leaving it set would show a spinner nothing will ever stop.\n */\nexport function restore(entries: Wire.Entry[], resume?: string): Chat {\n\treturn {\n\t\tentries: entries.map(entry => {\n\t\t\tlet { streaming: _streaming, ...rest } = entry;\n\t\t\treturn rest;\n\t\t}),\n\t\twaiting: [],\n\t\tbusy: false,\n\t\ttimings: new Map(),\n\t\tbackscroll: [],\n\t\t...(resume ? { resume } : {}),\n\t};\n}\n\nfunction now(): number {\n\treturn Math.floor(Date.now() / 1000);\n}\n\nfunction state(chat: Chat, server: Server, room: string): void {\n\tbroadcast(server, room, {\n\t\tkind: \"chat:state\",\n\t\tts: 0,\n\t\tbusy: chat.busy,\n\t\t...(chat.turn ? { turn: chat.turn } : {}),\n\t});\n}\n\n/** Only visible Planner prose ends the working projection. */\nfunction responded(chat: Chat, server: Server, room: string, text: string): void {\n\tif (!chat.turn || chat.turn.responded || !text.trim()) return;\n\tchat.turn.responded = true;\n\tstate(chat, server, room);\n}\n\n/**\n * The queue as clients see it.\n *\n * `spent` is a function and disappears on its own; `thread` is a string and\n * would not. Both are how the queue decides what to do, not anything a reader\n * of the transcript has business knowing.\n */\nfunction visible(chat: Chat): Wire.Waiting[] {\n\treturn chat.waiting.map(({ handle, id, text }) => ({ handle, id, text }));\n}\n\nfunction queued(chat: Chat, server: Server, room: string): void {\n\tbroadcast(server, room, { kind: \"chat:queue\", ts: 0, waiting: visible(chat) });\n}\n\nfunction say(\n\tchat: Chat,\n\tserver: Server,\n\troom: string,\n\tentry: Wire.Entry,\n): Wire.Entry {\n\tchat.entries.push(entry);\n\tannounce(server, room, entry);\n\treturn entry;\n}\n\nfunction announce(server: Server, room: string, entry: Wire.Entry): void {\n\tbroadcast(server, room, { kind: \"chat:message\", ts: 0, entry });\n}\n\n/** Everything said so far, for somebody who has just arrived. */\nexport function greet(chat: Chat, ws: Socket): void {\n\ttell(ws, {\n\t\tkind: \"chat:history\",\n\t\tts: 0,\n\t\tentries: chat.entries,\n\t\tbusy: chat.busy,\n\t\t...(chat.turn ? { turn: chat.turn } : {}),\n\t\tqueued: visible(chat),\n\t});\n}\n\nexport type Room = {\n\tchat: Chat;\n\tplan: Plan;\n\tserver: Server;\n\troom: string;\n\tconfig: Config;\n};\n\n/**\n * Take a message.\n *\n * A room message appears immediately. A planner message queued behind another\n * turn stays visibly queued until that turn actually begins, then moves into\n * the transcript exactly once. The destination, rather than its prose, decides\n * which lifecycle it takes.\n */\nexport function send(context: Room, ws: Socket, msg: Request): void {\n\tlet text = msg.text.trim();\n\tif (!text) return;\n\n\tlet { chat, room, server } = context;\n\tlet handle = ws.data.handle;\n\t// The explicit destination is authoritative. Falling back to the typing\n\t// shortcut keeps an older client predictable while rooms reconnect.\n\tlet destination = msg.to;\n\tif (destination === undefined) destination = addressed(text) ? \"planner\" : \"room\";\n\telse if (destination !== \"room\" && destination !== \"planner\") return;\n\tlet visible = destination === \"planner\" ? instruction(text) : text;\n\n\tif (destination === \"room\") {\n\t\tsay(chat, server, room, {\n\t\t\tid: ulid(),\n\t\t\tauthor: { kind: \"member\", handle },\n\t\t\ttext: visible,\n\t\t\tts: now(),\n\t\t});\n\t\tchat.backscroll = remember(chat.backscroll, { handle, text: visible });\n\t\treturn;\n\t}\n\tif (!context.config.agent) {\n\t\tsay(chat, server, room, {\n\t\t\tid: ulid(),\n\t\t\tauthor: { kind: \"member\", handle },\n\t\t\ttext: visible,\n\t\t\tts: now(),\n\t\t});\n\t\treturn void say(chat, server, room, {\n\t\t\tid: ulid(),\n\t\t\tauthor: { kind: \"system\" },\n\t\t\ttext: \"The agent is not running, so the plan has not been revised.\",\n\t\t\tts: now(),\n\t\t});\n\t}\n\n\tif (chat.busy) {\n\t\tif (chat.waiting.length >= MAX_QUEUE) {\n\t\t\treturn void say(chat, server, room, {\n\t\t\t\tid: ulid(),\n\t\t\t\tauthor: { kind: \"system\" },\n\t\t\t\ttext: \"The queue is full. Wait for the current turn to finish.\",\n\t\t\t\tts: now(),\n\t\t\t});\n\t\t}\n\t\tchat.waiting.push({ id: ulid(), handle, text: visible, message: true });\n\t\treturn queued(chat, server, room);\n\t}\n\n\tsay(chat, server, room, {\n\t\tid: ulid(),\n\t\tauthor: { kind: \"member\", handle },\n\t\ttext: visible,\n\t\tts: now(),\n\t});\n\tvoid run(context, handle, visible);\n}\n\n/** Say something in the transcript without asking the agent for anything. */\nexport function notice(context: Room, text: string): void {\n\tlet { chat, room, server } = context;\n\tsay(chat, server, room, { id: ulid(), author: { kind: \"system\" }, text, ts: now() });\n}\n\n/**\n * Start a turn from something other than a message.\n *\n * Accepting a comment is an instruction in a way prose is not — the `@ai` rule\n * exists to separate conversation from instruction, and a button press is\n * already the latter. What it is not is a thing anybody said, so the transcript\n * gets a system entry explaining why the agent started moving; an agent that\n * begins editing for no visible reason is worse than a noisy log.\n */\nexport function instruct(\n\tcontext: Room,\n\thandle: string,\n\ttext: string,\n\tsaid: string,\n\tabout: Instruction = {},\n): void {\n\tlet { chat, config, room, server } = context;\n\tnotice(context, said);\n\n\t// `AGENT=off` runs the room without one. The decision that got here is\n\t// still a decision and is already recorded; only the turn is impossible,\n\t// and saying so beats a session failing to open.\n\tif (!config.agent) {\n\t\treturn void say(chat, server, room, {\n\t\t\tid: ulid(),\n\t\t\tauthor: { kind: \"system\" },\n\t\t\ttext: \"The agent is not running, so the plan has not been revised.\",\n\t\t\tts: now(),\n\t\t});\n\t}\n\n\tif (chat.busy) {\n\t\tif (chat.waiting.length >= MAX_QUEUE) {\n\t\t\treturn void say(chat, server, room, {\n\t\t\t\tid: ulid(),\n\t\t\t\tauthor: { kind: \"system\" },\n\t\t\t\ttext: \"The queue is full. Wait for the current turn to finish.\",\n\t\t\t\tts: now(),\n\t\t\t});\n\t\t}\n\t\tchat.waiting.push({ id: ulid(), handle, text, ...about });\n\t\treturn queued(chat, server, room);\n\t}\n\n\tvoid run(context, handle, text, about.thread);\n}\n\n/** Withdraw a queued message. Only whoever wrote it may. */\nexport function unqueue(context: Room, ws: Socket, msg: Request): void {\n\tlet { chat, room, server } = context;\n\tlet found = chat.waiting.find(item => item.id === msg.id);\n\tif (!found || found.handle !== ws.data.handle) return;\n\tchat.waiting = chat.waiting.filter(item => item.id !== msg.id);\n\tqueued(chat, server, room);\n}\n\n/** Stop the running turn. Anyone may, and the transcript says who did. */\nexport async function abort(context: Room, ws: Socket): Promise {\n\tlet { chat, room, server } = context;\n\tif (!chat.busy || !chat.agent) return;\n\n\tawait chat.agent.session.abort().catch(() => {});\n\tsay(chat, server, room, {\n\t\tid: ulid(),\n\t\tauthor: { kind: \"system\" },\n\t\ttext: `@${ws.data.handle} stopped the turn.`,\n\t\tts: now(),\n\t});\n}\n\nasync function session(context: Room): Promise {\n\tlet { chat, config, plan, room, server } = context;\n\tif (chat.agent) return chat.agent;\n\n\t// Captured before it is overwritten: the question is whether there *was* a\n\t// conversation to resume, not whether there is one now.\n\tlet previous = chat.resume;\n\n\treturn chat.opening ??= (async () => {\n\t\tlet tools = toolbox({\n\t\t\tplan,\n\t\t\tserver,\n\t\t\troom,\n\t\t\tpublish: mutation => Service.publish(plan, server, room, mutation),\n\t\t\tanchors: () => Service.anchors(plan, server, room),\n\t\t\tchanges: found => Service.changes(plan, server, room, found),\n\t\t});\n\n\t\tlet { agent, resumed } = await Agent.open(config, { tools }, chat.resume);\n\t\tchat.agent = agent;\n\t\tchat.resume = agent.id;\n\t\tchat.opening = undefined;\n\t\tplan.sink.touch();\n\n\t\t// A transcript that survived while the conversation did not would\n\t\t// silently overstate what the agent remembers.\n\t\tif (previous && !resumed) {\n\t\t\tsay(chat, server, room, {\n\t\t\t\tid: ulid(),\n\t\t\t\tauthor: { kind: \"system\" },\n\t\t\t\ttext: \"The previous conversation could not be resumed; the agent does not \"\n\t\t\t\t\t+ \"remember what is above this line.\",\n\t\t\t\tts: now(),\n\t\t\t});\n\t\t}\n\n\t\treturn agent;\n\t})().catch(err => {\n\t\tchat.opening = undefined;\n\t\tthrow err;\n\t});\n}\n\n/**\n * Finish anything left mid-sentence.\n *\n * A message is normally completed by `assistant.message`, which arrives at the\n * end of a stream. An aborted or failed turn never sends one, so without this\n * the entry keeps its streaming flag and every client goes on drawing a caret\n * after a message that will never be added to.\n */\nfunction settle(chat: Chat, server: Server, room: string): void {\n\tfor (let entry of chat.entries) {\n\t\tif (!entry.streaming) continue;\n\t\tdelete entry.streaming;\n\t\tbroadcast(server, room, { kind: \"chat:message\", ts: 0, entry });\n\t}\n}\n\n/** Run one turn, then drain whatever queued up behind it. */\nasync function run(context: Room, handle: string, text: string, thread?: string): Promise {\n\tlet { chat, plan, room, server } = context;\n\n\tchat.busy = true;\n\tchat.turn = { id: ulid(), handle, started: now(), responded: false };\n\tchat.acting = thread;\n\tstate(chat, server, room);\n\n\ttry {\n\t\tlet agent = await session(context);\n\n\t\t/*\n\t\t * `send` resolves when the message is accepted, not when the turn is\n\t\t * over — the work happens afterwards, over events. Waiting on `send`\n\t\t * alone tears the handler down before the agent has said anything.\n\t\t *\n\t\t * `session.idle` is the turn actually ending. `session.error` resolves\n\t\t * it too: a turn that has failed is not going to reach idle, and\n\t\t * leaving the room busy forever is worse than ending early.\n\t\t */\n\t\tlet finished = Promise.withResolvers();\n\t\tchat.release = agent.session.on(event => {\n\t\t\ttranslate(context, event);\n\t\t\tif (event.type === \"session.idle\" || event.type === \"session.error\") {\n\t\t\t\tfinished.resolve();\n\t\t\t}\n\t\t});\n\n\t\t// Drained rather than copied: what the agent has been told once should\n\t\t// not arrive again on the next turn.\n\t\tlet prompt = compose(chat.backscroll, handle, text);\n\t\tchat.backscroll = [];\n\n\t\t// The handle travels to the model, because a position belongs to\n\t\t// whoever holds it.\n\t\tawait agent.session.send({ prompt });\n\t\tawait finished.promise;\n\t} catch (err) {\n\t\tconsole.error(\"[chat] turn failed:\", err);\n\t\tsay(chat, server, room, {\n\t\t\tid: ulid(),\n\t\t\tauthor: { kind: \"system\" },\n\t\t\ttext: err instanceof Error ? err.message : \"The agent could not be reached.\",\n\t\t\tts: now(),\n\t\t});\n\t} finally {\n\t\tchat.release?.();\n\t\tchat.release = undefined;\n\t\tchat.writing = undefined;\n\t\tchat.tooling = undefined;\n\t\tsettle(chat, server, room);\n\t\tchat.busy = false;\n\t\tchat.turn = undefined;\n\t\tchat.acting = undefined;\n\t\tstate(chat, server, room);\n\n\t\t/*\n\t\t * The agent's cursor outlives the turn by a moment.\n\t\t *\n\t\t * Somebody who looks over just as it finishes should still see where it\n\t\t * got to, and a caret that vanished on the same tick as the last token\n\t\t * would deny them that. Restarted rather than stacked: a queued turn\n\t\t * starting inside the linger must cancel this, or it would take down a\n\t\t * cursor the next turn had just placed.\n\t\t */\n\t\tclearTimeout(chat.lingering);\n\t\tchat.lingering = setTimeout(() => {\n\t\t\tchat.lingering = undefined;\n\t\t\tService.release(plan, server, room);\n\t\t}, LINGER_MS);\n\t}\n\n\tlet next = pending(chat);\n\tif (next) {\n\t\tqueued(chat, server, room);\n\t\tlet entry = next.message ? chat.entries.find(item => item.id === next.id) : undefined;\n\t\tif (entry) announce(server, room, entry);\n\t\tawait run(context, next.handle, next.text, next.thread);\n\t}\n}\n\n/**\n * The next queued turn worth running.\n *\n * A turn whose work is already done is dropped rather than run: four accepted\n * comments should not cost four passes over the plan when the agent dealt with\n * all of them in the first. Only something that queued behind a turn can be\n * spent, which is why the question is asked here and not when it was accepted.\n */\nexport function pending(chat: Chat): Waiting | undefined {\n\tlet next = chat.waiting.shift();\n\twhile (next?.spent?.()) next = chat.waiting.shift();\n\tif (next?.message) {\n\t\tchat.entries.push({\n\t\t\tid: next.id,\n\t\t\tauthor: { kind: \"member\", handle: next.handle },\n\t\t\ttext: next.text,\n\t\t\tts: now(),\n\t\t});\n\t}\n\treturn next;\n}\n\n/**\n * Turn what the SDK reports into what the room sees.\n *\n * Only the events a reader needs: what the agent said, what it is doing, and\n * when something failed. The rest is diagnostic noise that belongs in a log.\n *\n * Exported so it can be driven with synthetic events. Every field it reads\n * lives under `event.data` and several are near-homonyms of fields on the\n * envelope, which is the kind of mistake that produces plausible-looking\n * output rather than an error.\n */\nexport function translate(context: Room, event: SessionEvent): void {\n\tlet { chat, room, server } = context;\n\n\tswitch (event.type) {\n\t\tcase \"session.idle\":\n\t\t\tchat.tooling = undefined;\n\t\t\treturn;\n\n\t\t// One entry per assistant message, identified by the id the deltas\n\t\t// carry, so two messages in a turn do not run together.\n\t\tcase \"assistant.message_delta\": {\n\t\t\tlet { deltaContent, messageId } = event.data;\n\t\t\tlet entry = chat.entries.find(item => item.id === messageId);\n\t\t\tif (!entry) {\n\t\t\t\tchat.writing = messageId;\n\t\t\t\tsay(chat, server, room, {\n\t\t\t\t\tid: messageId,\n\t\t\t\t\tauthor: { kind: \"agent\" },\n\t\t\t\t\ttext: deltaContent,\n\t\t\t\t\tts: now(),\n\t\t\t\t\tstreaming: true,\n\t\t\t\t});\n\t\t\t\tresponded(chat, server, room, deltaContent);\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tentry.text += deltaContent;\n\t\t\tbroadcast(server, room, { kind: \"chat:delta\", ts: 0, id: messageId, text: deltaContent });\n\t\t\tresponded(chat, server, room, deltaContent);\n\t\t\treturn;\n\t\t}\n\n\t\tcase \"assistant.message\": {\n\t\t\t// `data.messageId`, not `event.id`. The envelope's id belongs to the\n\t\t\t// event; the message has its own, and it is the one the deltas were\n\t\t\t// keyed by. Looking up the wrong one finds nothing, appends a second\n\t\t\t// copy of the message, and leaves the first one streaming forever.\n\t\t\tlet { content, messageId } = event.data;\n\t\t\tlet entry = chat.entries.find(item => item.id === messageId);\n\n\t\t\tif (entry) {\n\t\t\t\tentry.text = content || entry.text;\n\t\t\t\tdelete entry.streaming;\n\t\t\t\tbroadcast(server, room, { kind: \"chat:message\", ts: 0, entry });\n\t\t\t\tresponded(chat, server, room, content);\n\t\t\t} else if (content.trim()) {\n\t\t\t\t// No deltas arrived — a short reply the model did not stream.\n\t\t\t\tsay(chat, server, room, {\n\t\t\t\t\tid: messageId,\n\t\t\t\t\tauthor: { kind: \"agent\" },\n\t\t\t\t\ttext: content,\n\t\t\t\t\tts: now(),\n\t\t\t\t});\n\t\t\t\tresponded(chat, server, room, content);\n\t\t\t}\n\n\t\t\tchat.writing = undefined;\n\t\t\treturn;\n\t\t}\n\n\t\tcase \"tool.execution_start\": {\n\t\t\tlet { arguments: args, toolCallId, toolName } = event.data;\n\t\t\tchat.timings.set(toolCallId, Date.now());\n\t\t\tlet activity: Wire.Activity = {\n\t\t\t\tid: toolCallId,\n\t\t\t\tname: toolName,\n\t\t\t\tstatus: \"running\",\n\t\t\t\t...(args ? { args: JSON.stringify(args, null, 2) } : {}),\n\t\t\t};\n\t\t\tbroadcast(server, room, {\n\t\t\t\tkind: \"chat:tool\",\n\t\t\t\tts: 0,\n\t\t\t\tentry: attach(context, activity),\n\t\t\t\tactivity,\n\t\t\t});\n\t\t\treturn;\n\t\t}\n\n\t\tcase \"tool.execution_complete\": {\n\t\t\tlet { error, result, success, toolCallId } = event.data;\n\t\t\tlet started = chat.timings.get(toolCallId);\n\t\t\tchat.timings.delete(toolCallId);\n\n\t\t\tlet detail = result?.content ?? (error ? JSON.stringify(error) : undefined);\n\t\t\t// The completion does not repeat the tool's name; the start did, and\n\t\t\t// the entry it was filed under still has it.\n\t\t\tlet activity: Wire.Activity = {\n\t\t\t\tid: toolCallId,\n\t\t\t\tname: named(chat, toolCallId),\n\t\t\t\tstatus: success ? \"done\" : \"failed\",\n\t\t\t\t...(started ? { took: Date.now() - started } : {}),\n\t\t\t\t// Bounded: a `grep` across a repository is not a thing anybody\n\t\t\t\t// wants delivered to every browser in the room.\n\t\t\t\t...(detail ? { result: detail.slice(0, 4_000) } : {}),\n\t\t\t};\n\t\t\tbroadcast(server, room, {\n\t\t\t\tkind: \"chat:tool\",\n\t\t\t\tts: 0,\n\t\t\t\tentry: attach(context, activity),\n\t\t\t\tactivity,\n\t\t\t});\n\t\t\treturn;\n\t\t}\n\n\t\t/*\n\t\t * A refused tool never executes, so it produces no start and no\n\t\t * completion — without this it leaves no trace at all, and the agent\n\t\t * quietly works around a boundary nobody can see it hitting. Which is\n\t\t * indistinguishable, from the outside, from a tool it never had.\n\t\t */\n\t\tcase \"permission.completed\": {\n\t\t\tlet { result, toolCallId } = event.data;\n\t\t\tif (!toolCallId || !result.kind.startsWith(\"denied\")) return;\n\n\t\t\tlet feedback = \"feedback\" in result && typeof result.feedback === \"string\"\n\t\t\t\t? result.feedback\n\t\t\t\t: undefined;\n\n\t\t\tlet activity: Wire.Activity = {\n\t\t\t\tid: toolCallId,\n\t\t\t\tname: named(chat, toolCallId),\n\t\t\t\tstatus: \"failed\",\n\t\t\t\tresult: feedback ?? \"Refused.\",\n\t\t\t};\n\t\t\tbroadcast(server, room, {\n\t\t\t\tkind: \"chat:tool\",\n\t\t\t\tts: 0,\n\t\t\t\tentry: attach(context, activity),\n\t\t\t\tactivity,\n\t\t\t});\n\t\t\treturn;\n\t\t}\n\n\t\tcase \"session.error\": {\n\t\t\tchat.tooling = undefined;\n\t\t\tsay(chat, server, room, {\n\t\t\t\tid: ulid(),\n\t\t\t\tauthor: { kind: \"system\" },\n\t\t\t\ttext: event.data.message || \"The agent stopped unexpectedly.\",\n\t\t\t\tts: now(),\n\t\t\t});\n\t\t\treturn;\n\t\t}\n\t}\n}\n\n/** What a running tool call was called, from where it was filed. */\nfunction named(chat: Chat, id: string): string {\n\tfor (let entry of chat.entries) {\n\t\tlet found = entry.tools?.find(activity => activity.id === id);\n\t\tif (found) return found.name;\n\t}\n\treturn \"tool\";\n}\n\n/**\n * File a tool call under the message that made it, and say which that was.\n *\n * A tool call that arrives before the agent has said anything — which is most\n * of them, since reading precedes writing — has no message to attach to yet.\n * It gets an entry of its own so the work is visible while it happens rather\n * than appearing retrospectively once the agent finishes talking.\n */\nfunction attach(context: Room, activity: Wire.Activity): string {\n\tlet { chat, room, server } = context;\n\t// Completion can arrive after idle; find its original activity by call id.\n\tlet entry = chat.entries.find(item => item.tools?.some(tool => tool.id === activity.id))\n\t\t?? chat.entries.find(item => item.id === chat.tooling)\n\t\t?? chat.entries.find(item => item.id === chat.writing);\n\tif (entry && !entry.tools?.some(tool => tool.id === activity.id)) chat.tooling = entry.id;\n\n\tif (!entry) {\n\t\tentry = { id: ulid(), author: { kind: \"agent\" }, text: \"\", ts: now(), tools: [] };\n\t\tchat.tooling = entry.id;\n\t\tsay(chat, server, room, entry);\n\t}\n\n\tentry.tools ??= [];\n\tlet existing = entry.tools.findIndex(item => item.id === activity.id);\n\tif (existing >= 0) entry.tools[existing] = { ...entry.tools[existing], ...activity };\n\telse entry.tools.push(activity);\n\treturn entry.id;\n}\n\n/** Let go of the session. 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