acp-debug

# ACP Debug Run a headless ACP JSON-RPC session against any registered kandev agent (or an arbitrary command), record every wire frame to a JSONL file, and summarize the handshake. Backed by the `acpdbg` binary at `apps/backend/bin/acpdbg`. ## When to use this skill - "what models does auggie advertise" - "probe claude-acp" / "probe all agents" / "run the matrix" - "debug why copilot-acp isn't starting" - "what does a `session/new` response actually look like for X" - "try this prompt against auggie with mode=ask" - "reproduce session/load for session <id> against claude-acp" - User mentions inspecting raw ACP wire payloads or a JSONL file from an earlier run ## Before anything else: build the binary if missing ```bash test -x apps/backend/bin/acpdbg || make -C apps/backend build-acpdbg ``` ## Sub-commands ```text acpdbg list # enumerate registered ACP agents acpdbg probe <agent> # initialize + session/new + close acpdbg probe --exec "<cmd> [args...]" # probe an arbitrary binary not in the registry acpdbg prompt --prompt "..." [--model M] [--mode M] <agent> acpdbg session-load --session-id <id> <agent> acpdbg matrix # probe every ACP agent in parallel ``` > **Flags MUST come before the positional `<agent>`.** The CLI uses Go's stdlib > `flag` parser, which stops at the first non-flag token — so any flag placed > *after* `<agent>` is si...