chore(deps): update the ACP Rust SDK to 2.2
Bump agent-client-protocol from 1.3 to 2.2. The 2.x crate still speaks ACP protocol v1 by default, so the wire format to the editor is the same and no handler code had to change. The unstable_auth_methods feature is dropped because agent auth methods are stable in 2.x and the feature name no longer exists. The agent-client-protocol skill still described 0.13 and listed two feature names that are gone, so it is updated to match. Refs #131 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Co-Authored-By: siGit Code v1.5.13 <noreply@sigit.si>
Seto Elkahfi committed
Oct 4, 2026 at 23:18 UTC
264654bd1ebb4b2d40a5df5c042bb36b005f1d55
4 files changed
+32
-20
.agents/skills/agent-client-protocol/SKILL.md
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-12
@@ -11,7 +11,7 @@ ACP is a JSON-RPC 2.0 protocol over **stdio** for integrating AI coding agents
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with editors (Zed, JetBrains, Neovim, etc.). The agent runs as a subprocess;
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the editor is the client. Communication is newline-delimited JSON on stdin/stdout.
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-Crate: `agent-client-protocol = "0.13"` (siGit pins 0.13.0 in `Cargo.lock`)
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+Crate: `agent-client-protocol = "2.2"` (siGit pins 2.2.0 in `Cargo.lock`)
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Docs: https://docs.rs/agent-client-protocol
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Spec: https://agentclientprotocol.com
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@@ -21,6 +21,11 @@ Spec: https://agentclientprotocol.com
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> handler receives a `ConnectionTo<Client>` (`cx`) you use to send notifications
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> and spawn tasks — so the old mpsc "circular dependency" pattern is gone.
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+> **SDK 2.x is not protocol v2.** The 2.x crate still speaks ACP protocol v1 by
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+> default, which is what siGit and Zed use (`ProtocolVersion::V1`). The draft v2
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+> protocol (`Agent.v2()`, `V2ConnectionTo`) sits behind the `unstable_protocol_v2`
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+> feature and siGit does not enable it.
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+
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siGit's entire ACP server lives in `src/main.rs` (`run_acp_server`, the
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`SiGitAgent` struct, and its `handle_*` methods). Read it alongside this skill.
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@@ -30,10 +35,8 @@ siGit's entire ACP server lives in `src/main.rs` (`run_acp_server`, the
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```toml
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[dependencies]
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-agent-client-protocol = { version = "0.13", features = [
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- "unstable_session_fork", # session/fork support
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- "unstable_session_additional_directories", # additional_directories on session requests
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- "unstable_auth_methods", # AuthMethod::Agent etc.
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+agent-client-protocol = { version = "2.2", features = [
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+ "unstable_session_fork", # session/fork support
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] }
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async-trait = "0.1"
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tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros", "io-std", "io-util", "sync", "time"] }
@@ -42,9 +45,12 @@ futures = "0.3"
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uuid = { version = "1", features = ["v4"] }
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```
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-The `unstable_*` features gate real types/methods (`ForkSessionRequest`,
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-`additional_directories`, `AuthMethod::Agent`). Without them the corresponding
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-APIs don't exist and you'll get "no variant/method" errors.
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+The `unstable_*` features gate real types/methods (`ForkSessionRequest`).
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+Without them the corresponding APIs don't exist and you'll get "no
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+variant/method" errors. `additional_directories` and `AuthMethod::Agent` used
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+to need `unstable_session_additional_directories` and `unstable_auth_methods`;
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+both are stable in 2.x and those feature names no longer exist, so listing them
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+is a Cargo resolution error.
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---
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@@ -556,10 +562,9 @@ Editor Agent
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8. **Never write to stdout except JSON-RPC** — log to stderr; in TTY mode siGit
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redirects fds to `$TMPDIR/sigit.log`. Any stray `println!` or native library
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stdout write corrupts the wire.
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-9. **Unstable features gate real types** — `unstable_session_fork`,
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- `unstable_session_additional_directories`, `unstable_auth_methods` must be on
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- in `Cargo.toml` or `ForkSessionRequest`, `additional_directories`, and
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- `AuthMethod::Agent` won't exist.
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+9. **Unstable features gate real types** — `unstable_session_fork` must be on
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+ in `Cargo.toml` or `ForkSessionRequest` won't exist. `additional_directories`
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+ and `AuthMethod::Agent` are stable in 2.x and need no feature.
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10. **Zed re-fires the last config selection on connect** — make
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`setConfigOption` a no-op when the requested model is already active, and
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never start a model switch while a startup load is still in flight (GPU OOM).
CHANGELOG.md
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@@ -2,6 +2,13 @@
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## Unreleased
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+### Changed
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+
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+- **The ACP Rust SDK is now 2.2** (`agent-client-protocol`, up from 1.3).
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+ siGit Code still speaks ACP protocol v1 to the editor, so nothing changes on
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+ the wire. The `unstable_auth_methods` feature is gone because agent auth
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+ methods are stable in 2.x.
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+
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## 1.5.13
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### Added
Cargo.lock
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-7
@@ -20,9 +20,9 @@ checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
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[[package]]
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name = "agent-client-protocol"
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-version = "1.3.0"
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+version = "2.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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-checksum = "1d386d6a58f4dbe0ebfa98e915caa54005dabdefd419de3d4678b28cd5752444"
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+checksum = "13f780597b2c88ab83d02509bcc3e86366751f86fa12114005e35c55ed691763"
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dependencies = [
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"agent-client-protocol-derive",
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"agent-client-protocol-schema",
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[[package]]
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name = "agent-client-protocol-derive"
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-version = "1.3.0"
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+version = "2.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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-checksum = "97b94934d118a69e921d14e94d4af5b3076563318c52662c89a0ecb3f139e1da"
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+checksum = "f4893bfb11e0e193aa5a64611a126ee87567acb1879556519c902722899229de"
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dependencies = [
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"quote",
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- "syn 2.0.119",
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+ "syn 3.0.4",
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]
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[[package]]
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name = "agent-client-protocol-schema"
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-version = "1.4.0"
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+version = "1.9.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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-checksum = "06679e1542356341f4550ccfb16338b64f37f6af70de2105446ef6fbb078234c"
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+checksum = "1d595a79e1665d02c91c7dd1bedd118501e75cc0a3d5b1651b5150ec4c5c1e0d"
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dependencies = [
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"anyhow",
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"derive_more",
Cargo.toml
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[dependencies]
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# ACP protocol SDK
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-agent-client-protocol = { version = "1.3", features = ["unstable_session_fork", "unstable_auth_methods"] }
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+agent-client-protocol = { version = "2.2", features = ["unstable_session_fork"] }
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# Onde Inference engine (local LLM)
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# onde = { path = "../onde" }