Files

T

retoor cc1c130b51 CAP protocol both directions: agent speak plus orchestrator drivers (1.39.0)

- Agent side: --cap-manifest plus --cap-speak stream-json binding with
  transcript-diff frames, diff/transcript artifacts, session config
- Orchestrator: PTY driver (settle heuristics on PtyProc/TuiVtScreen),
  stream-json, ACP-stdio (permission/elicit/fs/terminal serving) and
  A2A drivers (dual draft/current spelling, SSE mapping)
- Sessions, fleets: worktrees, master plans, mediated routing,
  budget refusal, audit log, research auto-answerer, --cap CLI
- cap.md contract with drift tests; research/cap-protocol archive
- Suites 1119 + 16 green

2026-10-18 13:17:35 +02:00

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ACP introduction and architecture

Metadata

Field	Value
Institute	Molodetz Institute — Research & Retrieval Division
Subject	cap-protocol
Document type	Source Dossier
Tier	1
Source title	ACP Introduction
Source URL	https://agentclientprotocol.com/get-started/introduction.md
Source type	documentation
Source date (published)	Unknown, not stated (living docs)
Date researched	2026-10-18
Researched by	tai (agent), model: Muse Spark, on behalf of retoor
Research method	direct page fetch, read in full
Confidence	High
Status	Active

Summary

ACP standardizes editor-to-agent communication (LSP analogy): local agents run as editor subprocesses over JSON-RPC stdio; remote agents over HTTP/WebSocket (remote support still in progress). Reuses MCP JSON shapes where possible; user text defaults to Markdown.

Key findings

Local = subprocess + JSON-RPC over stdio is the stable, specified path; remote is explicitly work-in-progress, so tai's ACP binding targets stdio only.
Markdown as the default user-text format aligns with tai's TUI rendering.

Pros / strengths

Confirms stdio as the SHOULD-support transport, matching CAP's ACP-stdio binding exactly.

Cons / limitations / caveats

Positioning page only; no wire detail (covered by the sibling dossiers).

Relevance to tai

Scopes tai's ACP binding to local stdio and records why remote ACP is out of scope.

Changelog

Date	Change
2026-10-18	Initial dossier created.

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