acp-kit

acp-kit

Reusable Go packages for ACP-backed chat relays such as poe-acp and slack-acp.

Module:

module github.com/kfet/acp-kit

Requires Go 1.25+ (uses os.Root sandboxing and the tool go.mod directive).

Packages

• client — stdio ACP child process client: initialize, sessions, prompts, caps, model selection, auth hooks, fs callbacks.
• client/auth — small schema for ACP auth method/result metadata.
• state — conversation-key to ACP-session manager: stable cwd allocation, best-effort resume, idle GC, system-prompt fallback regime.
• attachments — cwd-local attachment sandbox plus ACP ResourceLink / embedded text resource blocks.
• skills — load embedded/host fir-style skills and format <available_skills> catalogs.
• sysprompt — compose base relay prompt, operator extra text, and skill catalogs.
• paths — XDG state/config path helpers.
• log — opt-in debug logging.

Contracts worth preserving

• Idle GC drops only in-memory session bindings; it never removes conversation cwds.
• state uses two system-prompt regimes:
  • if the agent advertises session.systemPrompt, the prompt is sent via session/new._meta;
  • otherwise it is exposed once through TakePendingSystemPrompt, and re-armed after resume.
• skills.LoadBuiltin requires an app-specific prefix so different relays do not collide in $TMPDIR.
• attachments.Store writes through os.Root; hostile filenames cannot escape the per-message directory.