Building an ACP-Compatible Agent Live — Bennet Fenner, Zed

What was stored

cues

225

whisperx 225

chunks

32

from 225 cues

keyframes

24

kept of 48 captured

frames with text

24

1,310 lines read

chapters

0

from the source metadata

keyframe bytes

6.2 MB

word timings on 225 cues

Provenance

Frames, and what the machine read

• 

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  shot 0·sharpness 667.2

  1. AlEngineer0.97
  2. EUROPE1.00
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  0:08 #1 done2 line(s)

  shot 1·sharpness 823.9

  1. PRESENTINGSPONSOR1.00
  2. Google DeepMind1.00
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  0:13 #2 done3 line(s)

  shot 2·sharpness 938.7

  1. PLATINUM SPONSORS0.98
  2. # Braintrust0.96
  3. WorkOS OpenAI0.96
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  0:24 #3 done5 line(s)

  shot 3·sharpness 275.8

  1. Building an ACP1.00
  2. compatible agent1.00
  3. Bennet Fenner - April 10, 20260.97
  4. AlEngineer0.98
  5. EUROPE1.00
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  1:01 #4 done6 line(s)

  shot 4·sharpness 1492.5

  1. CCS0.67
  2. Agent/Client1.00
  3. AIE1.00
  4. ★1.00
  5. Protocol1.00
  6. Engineering the future of Al0.98
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  shot 5·duplicate of #4

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  1:56 #6 done22 line(s)

  shot 6·sharpness 1181.7

  1. 圆0.53
  2. JETBRAINS1.00
  3. SIDEQUERY1.00
  4. In Progcess0.96
  5. marimo1.00
  6. ★1.00
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  8. AIE1.00
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  14. Nneovim1.00
  15. a0.76
  16. Obsidian1.00
  17. ALZEN0.79
  18. DEDPOHAT0.89
  19. MEB BRONSER0.81
  20. 40+ Clients1.00
  21. AlEngineer0.98
  22. EUROPE1.00
• 

  2:05 #7 done69 line(s)

  shot 7·sharpness 2508.5

  1. acp-demo main0.96
  2. acp-demo-agent - Current Worktree (main)0.95
  3. ACP: acp-demo-agent0.99
  4. agent.ts0.96
  5. helpers.ts1.00
  6. coding-agent.ts1.00
  7. + .0.73
  8. src/agent.ts1.00
  9. QIS0.60
  10. 11.00
  11. import * as acp from "@agentclientprotocol/sdk";1.00
  12. 21.00
  13. import { Readable, Writable } from "node:stream";1.00
  14. 31.00
  15. import { CodingAgent, ToolResult } from "./coding-agent.js";0.99
  16. 'ToolResult' is declared0.98
  17. 41.00
  18. import { extractText } from "./helpers.js";0.99
  19. 'extractText' is declared but its value is0.99
  20. 51.00
  21. 61.00
  22. class AcpAgent implements acp.Agent {1.00
  23. 71.00
  24. connection: acp.AgentSideConnection;1.00
  25. 81.00
  26. sessions: Map<acp.SessionId, CodingAgent>;1.00
  27. ★1.00
  28. ★1.00
  29. AIE1.00
  30. ★1.00
  31. ★1.00
  32. 101.00
  33. 91.00
  34. constructor(connection: acp.AgentSideConnection) {1.00
  35. ★1.00
  36. ★1.00
  37. 111.00
  38. this.connection = connection;1.00
  39. ★1.00
  40. ★1.00
  41. ★1.00
  42. 121.00
  43. this.sessions = new Map();1.00
  44. 131.00
  45. 141.00
  46. 151.00
  47. async initialize(1.00
  48. 161.00
  49. _params: acp.InitializeRequest,1.00
  50. 171.00
  51. ): Promise<acp.InitializeResponse> {1.00
  52. 181.00
  53. throw new Error(message: "Not implemented");0.99
  54. 191.00
  55. 201.00
  56. 211.00
  57. async authenticate(1.00
  58. 221.00
  59. _params: acp.AuthenticateRequest,0.99
  60. Failed to Launch0.96
  61. Intemal error:0.91
  62. 231.00
  63. ): Promise<acp.AuthenticateResponse | void> {0.99
  64. "details": "Not implemented"0.91
  65. 241.00
  66. throw new Error(message: "Not implemented");0.99
  67. 5:1 Typo5crot 2= E= 8 P0.75
  68. AlEngineer0.95
  69. EUROPE1.00
• 

  2:49 #8 done64 line(s)

  shot 8·sharpness 2286.4

  1. acp-demo main0.95
  2. acp-demo-agent Current Worktree (main)0.97
  3. ACP: acp-demo-agent0.98
  4. agent.ts1.00
  5. helpers.ts1.00
  6. coding-agent.ts1.00
  7. src/coding-agent.ts, const TOOLS, input_schema, properties0.95
  8. 431.00
  9. 441.00
  10. export type StopReason = "end_turn" | "max_tokens" | "cancelled";0.98
  11. 451.00
  12. 461.00
  13. export class CodingAgent {1.00
  14. 470.97
  15. private anthropic = new Anthropic();1.00
  16. 481.00
  17. private messages: Anthropic.MessageParam[] = [];0.99
  18. 491.00
  19. private abort: AbortController | null = null;0.99
  20. 501.00
  21. ★1.00
  22. ★1.00
  23. 511.00
  24. constructor(p1.00
  25. ★1.00
  26. AIE1.00
  27. ★1.00
  28. 521.00
  29. (parameter) userText: string0.99
  30. ★1.00
  31. ★1.00
  32. 531.00
  33. async prompt(userText: string): Promise<StopReason> {1.00
  34. ★1.00
  35. ★1.00
  36. ★1.00
  37. 541.00
  38. this.abort = new AbortController();0.99
  39. 551.00
  40. this.messages.push(...items: { role: "user", content: userText });0.99
  41. 561.00
  42. 571.00
  43. try {1.00
  44. 581.00
  45. return await this.agentLoop();0.98
  46. 591.00
  47. } catch (err) {0.97
  48. 601.00
  49. if (this.abort.signal.aborted) return "cancelled";1.00
  50. 611.00
  51. throw err;0.99
  52. 621.00
  53. }finally {0.99
  54. 631.00
  55. this.abort = null;0.97
  56. 641.00
  57. }0.80
  58. Failed to Launch0.98
  59. Internal error: {0.94
  60. 651.00
  61. "details": "Not implemented"0.92
  62. 661.00
  63. 28:11 Type5cript 2+ E 80.81
  64. Engineering the future of Al1.00
• 

  3:10 #9 skipped

  shot 9·duplicate of #8

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  3:30 #10 skipped

  shot 10·duplicate of #8

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  4:02 #11 done79 line(s)

  shot 11·sharpness 3082.5

  1. acp-demo main0.94
  2. acp-demo-agent Current Worktree (main)0.96
  3. ACP: acp-demo-agent0.98
  4. agent.ts1.00
  5. helpers.ts1.00
  6. coding-agent.ts0.98
  7. +0.80
  8. src/coding-agent.ts, class CodingAgent, private async handleToolCcall()0.96
  9. 0 IS0.58
  10. 1341.00
  11. private async handleReadFile(1.00
  12. 1351.00
  13. toolCallId: string,1.00
  14. 'toolCallId' is declared but its value is never read.0.99
  15. 1361.00
  16. input: Record<string, unknown>,0.99
  17. 1371.00
  18. ): Promise<ToolResult> {0.98
  19. 1381.00
  20. const path = input.path as string;1.00
  21. 1391.00
  22. 1401.00
  23. let isError : boolean = false;0.98
  24. 1411.00
  25. let content;1.00
  26. AIE1.00
  27. ★1.00
  28. ★0.99
  29. 1421.00
  30. 1431.00
  31. try {1.00
  32. const fs : { default: typeof import("fs/promises"); access(path: PathLike, mode?:0.99
  33. ★1.00
  34. 1441.00
  35. content = await fs.readFile(path: path, options: "utf-8");1.00
  36. ★1.00
  37. ★1.00
  38. ★1.00
  39. 1451.00
  40. } catch (err: unknown0.98
  41. function readFile(path: PathLike | FileHandle,0.98
  42. 1461.00
  43. isError = true;0.99
  44. options: ({0.98
  45. 1471.00
  46. content = err insta1.00
  47. encoding: BufferEncoding;1.00
  48. 1481.00
  49. }0.68
  50. flag?: OpenMode | undefined;0.98
  51. 1491.00
  52. } & EventEmitter<T extends EventMap<T> =0.98
  53. 1501.00
  54. return { isError: isE1.00
  55. DefaultEventMap>.Abortable) | BufferEncoding):0.98
  56. 1511.00
  57. }0.50
  58. Promise<string> (+2 overloads)1.00
  59. 1521.00
  60. 1531.00
  61. private async handleEdi Asynchronously reads the entire contents of a file.0.99
  62. 1541.00
  63. toolCallId: string,0.98
  64. @param path0.98
  65. read.1.00
  66. 1551.00
  67. input: Record<string,0.99
  68. A path to a file. If a URL is provided, it must use the file:0.99
  69. Failed to Launch0.96
  70. Interal error: {0.94
  71. 1561.00
  72. ): Promise<ToolResult>1.00
  73. protocol. If a FileHandle is provided, the underlying file will1.00
  74. "details": "Not implemented"0.92
  75. 1571.00
  76. const path = input.path as string;1.00
  77. 117:36 Type5crpt 8+8P は0.75
  78. AlEngineer0.96
  79. EUROPE1.00
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  shot 12·duplicate of #11

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  shot 13·duplicate of #8

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  shot 18·duplicate of #8

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  shot 19·duplicate of #8

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  7:17 #20 done106 line(s)

  shot 20·sharpness 3036.6

  1. acp-demo main0.95
  2. Settings0.97
  3. ACP: acp-demo-agent0.98
  4. agent.ts0.98
  5. types,gen.d.ts0.91
  6. helpers.ts0.97
  7. coding-agent.ts1.00
  8. External Agents1.00
  9. All agents conected through the Agent Clie0.96
  10. acp-demo-agent0.96
  11. Extemal Agents0.97
  12. Claudo Agent0.91
  13. × Zed Agent0.94
  14. acp-demo-nt0.96
  15. pent0.65
  16. src/agent.ts- class AcpAgent- async cancel()0.96
  17. 391.00
  18. async prompt(params: acp.PromptRequest): Promise<acp.PromptResponse> {0.99
  19. 0 IS0.58
  20. claude-dev0.98
  21. Claude Agent0.97
  22. Codex CLI0.99
  23. codex-dev0.95
  24. claude-dev0.97
  25. 00.63
  26. 411.00
  27. 401.00
  28. const agent : CodingAgent | undefined = this.sessions.get(key: params.sessionId);0.98
  29. if (!agent) {0.92
  30. @ Codex CLI0.93
  31. @ Factory Droid0.93
  32. Cursor1.00
  33. 420.82
  34. throw new Error(message: 'Session not found: ${params.sessionId}');0.99
  35. codex-dev0.92
  36. Kimi CLI0.95
  37. GitHub Copilot0.99
  38. 431.00
  39. AIE1.00
  40. ★1.00
  41. ★1.00
  42. ★1.00
  43. Kimi CLI0.91
  44. M Mistral Vibe0.97
  45. Cursor1.00
  46. GitHub Copilot0.95
  47. @ Factory Droid0.95
  48. M Mistral Vibe0.98
  49. OpenCode0.99
  50. + Add More Agents0.97
  51. 00.96
  52. 00.96
  53. 00.95
  54. 441.00
  55. 451.00
  56. 461.00
  57. 471.00
  58. 481.00
  59. const stopReason : StopReason = await agent.prompt(userText: text);1.00
  60. return {0.99
  61. };0.80
  62. const text : string = extractText(prompt: params.prompt);0.99
  63. stopReason,1.00
  64. ★1.00
  65. ★1.00
  66. ★1.00
  67. OpenCode0.95
  68. 00.99
  69. 491.00
  70. 501.00
  71. Model Context Protocol (MCP) Servers1.00
  72. + Add Server0.93
  73. 511.00
  74. async cancel(params: acp.CancelNotification): Promise<void> {1.00
  75. All MCP servers connected directly or via a Zed extension.0.99
  76. Postgres0.94
  77. 521.00
  78. const agent : CodingAgent | undefined = this.sessions.get(key: params.sessionId);0.99
  79. C. Context7 3 2 sools0.88
  80. 531.00
  81. if (!agent) {0.95
  82. 541.00
  83. throw new Error(message: 'Session not found: ${params.sessionId}');0.99
  84. LLM Providers1.00
  85. + Add Provider0.93
  86. 551.00
  87. Add at least one provider to use Al-powered features with Zed's native agent.1.00
  88. Zed Prs0.86
  89. 561.00
  90. 571.00
  91. agent.cancel();1.00
  92. Amazon Bedrock0.97
  93. 581.00
  94. A Anthropic0.91
  95. 591.00
  96. GitHub Copilot Chat0.96
  97. 601.00
  98. const input : WritableStream<any> = Writable.toWeb(streamWritable: process.stdout);0.99
  99. DeepSeek0.92
  100. 611.00
  101. const output = Readable.toWeb(streamReadable: process.stdin) as ReadableStream<Uint8Arra0.99
  102. 620.92
  103. conct etrosm : Strosm = scn nd lconStrosmloutnut: innut innut: outnut).0.92
  104. 00.60
  105. 56:20 Type5crot 2+ E 8 P0.75
  106. Engineering the future of Al1.00
• 

  8:05 #21 done26 line(s)

  shot 21·sharpness 1775.8

  1. acp-demo main0.92
  2. Hello0.92
  3. ☐ ACP: acp-demo-agent0.96
  4. agent.ts1.00
  5. types.gen.d.ts0.97
  6. helpers.ts1.00
  7. coding-agent.ts0.99
  8. Hello0.96
  9. ★1.00
  10. AIE1.00
  11. ★1.00
  12. ★1.00
  13. ★1.00
  14. ★1.00
  15. ★1.00
  16. ↑ session/new0.97
  17. { "cwd": "/Users/bebo/workspace/acp-demo", "mcpServers": [{ "name": "mcp-server-context7", "command": "/usr/local/bin,0.99
  18. ↓session/ne0.96
  19. { "sessionId": "65bb6bf5-739e-4028-9fc3-7774b7b5f8f5"}0.98
  20. ↑ session/prompt0.97
  21. Message acp-deno-agent - φ to snctude context0.94
  22. { "sessionId": "65bb6bf5-739e-4028-9fc3-7774b7b5f8f5", "prompt": [{ "type": "text", "text": "Hello" }] }0.98
  23. ↓ session/prompt0.97
  24. { "stopReason": "end_turn"}0.98
  25. Braintrust1.00
  26. WorkOS OpenAl0.92
• 

  8:25 #22 skipped

  shot 22·duplicate of #11

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  8:38 #23 done77 line(s)

  shot 23·sharpness 2964.3

  1. acp-demo main0.96
  2. Hello0.91
  3. ACP: acp-demo-agent0.99
  4. agent.ts0.96
  5. Definitions for CodingAg...0.96
  6. types,gen.d.ts0.91
  7. helpers.ts0.98
  8. coding-agent.ts0.99
  9. + .0.71
  10. Hello0.99
  11. src/agent.ts- class AcpAgent- async newSession( ), const agent0.96
  12. 0 IS0.57
  13. 151.00
  14. async initialize(0.99
  15. 161.00
  16. _params: acp. Init: Cancels ongoing operations for a session.0.99
  17. 171.00
  18. 181.00
  19. ): Promise<acp.Init:1.00
  20. return {1.00
  21. This is a notification sent by the client to cancel an ongoing prompt turn.0.99
  22. 191.00
  23. protocolVersion1.00
  24. Upon receiving this notification, the Agent SHOULD:0.99
  25. 201.00
  26. }i0.64
  27. • Stop all language model requests as soon as possible0.99
  28. 211.00
  29. • Abort all tool call invocations in progress0.98
  30. ★1.00
  31. 221.00
  32. • Send any pending session/update notifications0.98
  33. AIE1.00
  34. ★1.00
  35. 231.00
  36. async authenticate(1.00
  37. • Respond to the original session/prompt request with0.99
  38. ★1.00
  39. ★1.00
  40. ★1.00
  41. ★1.00
  42. 241.00
  43. 251.00
  44. 261.00
  45. ): Promise<acp. Auth See protocol docs: Cancellation0.97
  46. _params: acp.Authe0.98
  47. cancel1.00
  48. StopReason::Cancelled1.00
  49. 271.00
  50. 281.00
  51. async newSession(1.00
  52. params: acp.NewSes0.99
  53. connection1.00
  54. authenticate1.00
  55. 291.00
  56. ): Promise<acp.NewSe-0.98
  57. 301.00
  58. const id : '${str: Z const agent = new CodingAgent(params.cwd, this.connection0.98
  59. 311.00
  60. const agent = new CodingAgent(cwd: params.cwd, connection: this.c;0.99
  61. Expected 3 arg0.97
  62. 321.00
  63. this.sessions.set(key: id, value: agent);1.00
  64. 331.00
  65. 341.00
  66. return {1.00
  67. 351.00
  68. sessionId: id,1.00
  69. Message acp-demo~agent - to inctude context0.96
  70. 361.00
  71. }i0.65
  72. 371.00
  73. 381.00
  74. 2 Property 'c' does not exist on type AcpAgont0.93
  75. 31:53 Typešcrpt 24P0.77
  76. AlEngineer0.97
  77. EUROPE1.00

Transcript

225 cues· 2,586 words· 13,218 chars