fix(update): restore legacy self-update compatibility

.github/workflows/release.yml

@@ -551,7 +551,7 @@ jobs:
           bin: a3s
           target: ${{ matrix.target }}
           archive: a3s-$tag-$target
-          include: web,${{ matrix.helper }}
+          include: web,release-compat,${{ matrix.helper }}
           tar: all
           zip: windows
           checksum: sha256
@@ -597,6 +597,27 @@ jobs:
               exit 1
             fi
           done
+          bridge_root='release-compat/support/managed-srt'
+          bridge_lock="${bridge_root}/package-lock.json"
+          bridge_cli="${bridge_root}/node_modules/@anthropic-ai/sandbox-runtime/dist/cli.js"
+          tar_entries="$(tar -tzf "${base}.tar.gz")"
+          for bridge_path in "$bridge_lock" "$bridge_cli"; do
+            bridge_count="$(grep -Ec "(^|/)${bridge_path}$" <<<"$tar_entries" || true)"
+            if [[ "$bridge_count" -ne 1 ]]; then
+              echo "::error::Release archive must contain exactly one legacy self-update bridge path ${bridge_path}; found ${bridge_count}"
+              exit 1
+            fi
+          done
+          if [[ "$RELEASE_TARGET" == "x86_64-pc-windows-msvc" ]]; then
+            zip_entries="$(unzip -Z1 "${base}.zip")"
+            for bridge_path in "$bridge_lock" "$bridge_cli"; do
+              bridge_count="$(grep -Ec "(^|/)${bridge_path}$" <<<"$zip_entries" || true)"
+              if [[ "$bridge_count" -ne 1 ]]; then
+                echo "::error::Windows release archive must contain exactly one legacy self-update bridge path ${bridge_path}; found ${bridge_count}"
+                exit 1
+              fi
+            done
+          fi
           gh release upload "$tag" "${assets[@]}" --clobber
 
   crate:

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Restored one-command self-updates from A3S 0.9.9 through 0.10.10 by adding a
+  minimal, fail-closed retirement marker to release archives for their legacy
+  managed-SRT payload check. The Anthropic SRT runtime remains removed and the
+  marker is never discovered or executed by current A3S versions.
+
 ## [0.10.14] - 2026-07-29
 
 ### Fixed

Cargo.toml

@@ -8,6 +8,7 @@ repository = "https://github.com/A3S-Lab/Cli"
 homepage = "https://github.com/A3S-Lab/a3s"
 keywords = ["a3s", "cli", "agent", "tui", "coding"]
 categories = ["command-line-utilities"]
+exclude = ["release-compat/**", "tests/legacy_self_update_bridge.rs"]
 
 [[bin]]
 name = "a3s"

release-compat/README.md

@@ -0,0 +1,12 @@
+# Legacy self-update bridge
+
+This directory is included only in release archives.
+
+A3S 0.9.9 through 0.10.10 required every self-update archive to contain a
+`support/managed-srt` tree before they would install the new binary. A3S 0.10.11
+removed the Anthropic SRT runtime, so omitting that tree made those older
+clients unable to update themselves.
+
+The nested package is an inert, fail-closed compatibility marker. Current A3S
+versions do not discover or execute it, and it must never acquire sandbox
+runtime dependencies or implementation code.

release-compat/support/managed-srt/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "a3s-managed-srt-retirement-bridge",
+  "version": "1.0.0",
+  "private": true,
+  "description": "Inert release marker for legacy A3S self-updaters",
+  "dependencies": {
+    "@anthropic-ai/sandbox-runtime": "0.0.0-a3s-retired"
+  }
+}

tests/legacy_self_update_bridge.rs

@@ -0,0 +1,74 @@
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use serde_json::Value;
+
+const RETIRED_PACKAGE_VERSION: &str = "0.0.0-a3s-retired";
+
+fn repository_path(relative: impl AsRef<Path>) -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR")).join(relative)
+}
+
+#[test]
+fn bridge_matches_the_legacy_updater_contract_and_fails_closed() {
+    let root = repository_path("release-compat/support/managed-srt");
+    let package_path = root.join("node_modules/@anthropic-ai/sandbox-runtime/package.json");
+    let package: Value = serde_json::from_slice(&fs::read(&package_path).unwrap()).unwrap();
+    assert_eq!(
+        package.get("name").and_then(Value::as_str),
+        Some("@anthropic-ai/sandbox-runtime")
+    );
+    assert_eq!(
+        package.get("version").and_then(Value::as_str),
+        Some(RETIRED_PACKAGE_VERSION)
+    );
+
+    let lock_path = root.join("package-lock.json");
+    let lock: Value = serde_json::from_slice(&fs::read(&lock_path).unwrap()).unwrap();
+    assert_eq!(lock.get("lockfileVersion").and_then(Value::as_u64), Some(3));
+    assert_eq!(
+        lock.pointer("/packages/node_modules~1@anthropic-ai~1sandbox-runtime/version")
+            .and_then(Value::as_str),
+        Some(RETIRED_PACKAGE_VERSION)
+    );
+    assert_eq!(
+        lock.pointer("/packages//dependencies/@anthropic-ai~1sandbox-runtime")
+            .and_then(Value::as_str),
+        Some(RETIRED_PACKAGE_VERSION)
+    );
+
+    let cli_path = root.join("node_modules/@anthropic-ai/sandbox-runtime/dist/cli.js");
+    let cli = fs::read_to_string(&cli_path).unwrap();
+    assert!(cli.contains("Anthropic SRT was removed from A3S"));
+    assert!(cli.contains("process.exitCode = 1"));
+    for forbidden in ["child_process", "require(", "import ", "eval("] {
+        assert!(
+            !cli.contains(forbidden),
+            "bridge must not contain {forbidden}"
+        );
+    }
+
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+        assert_ne!(
+            fs::metadata(cli_path).unwrap().permissions().mode() & 0o111,
+            0
+        );
+    }
+}
+
+#[test]
+fn release_workflow_packages_and_verifies_the_bridge() {
+    let workflow = fs::read_to_string(repository_path(".github/workflows/release.yml")).unwrap();
+    assert!(workflow.contains("include: web,release-compat,${{ matrix.helper }}"));
+    assert!(workflow.contains("bridge_root='release-compat/support/managed-srt'"));
+    assert!(workflow.contains("bridge_lock=\"${bridge_root}/package-lock.json\""));
+    assert!(workflow.contains(
+        "bridge_cli=\"${bridge_root}/node_modules/@anthropic-ai/sandbox-runtime/dist/cli.js\""
+    ));
+
+    let manifest = fs::read_to_string(repository_path("Cargo.toml")).unwrap();
+    assert!(manifest
+        .contains("exclude = [\"release-compat/**\", \"tests/legacy_self_update_bridge.rs\"]"));
+}