at_client_skills

• Document RPC between atsigns — AtRpc / AtRpcClient request/response (new references/13-rpc.md).
• Document headless agents and multi-instance coordination — CLIBase auth, per-process storage paths, the immutable-mutex pattern, and stateless scaling with ServiceFactoryWithNoOpSyncService (new references/14-multi-agent.md).
• Document remote vs local atServer operations — client-wide remoteLocalPref, per-operation useRemoteAtServer, and bypassCache (new references/12-remote-atserver.md).
• Document the rule to never pin at_client / at_client_flutter versions — install with dart pub add instead.
• Clarify the macOS network.server entitlement is only needed when the app opens a listening socket (e.g. NoPorts tunnels).
• Add noports_core and at_stream (pre-release) to the package map.
• Document that at_onboarding_flutter is discontinued — use at_client_flutter.
• Add evals covering the new content, and tighten the owner-writes-only and activation evals.
• Document the skills CLI prerequisite and the full install steps in the README.

• Document sync scoping (syncRegex) and the sync lifecycle (new references/11-sync.md).
• Document the rule to hold watch() streams in State, never in build(), and fix the StreamBuilder snippets.
• Document the owner-writes-only collaboration/ownership model.
• Document the atSign activation / atDirectory prerequisite.

• Add user-invocable: true so the skill registers as a slash command.
• Document the required macOS entitlements in references/05-flutter-auth.md: network.client (connect to the atServer) and files.user-selected.read-only (the .atKeys file picker).
• Fix the test-hooks import: the helpers come from at_client.dart, not the src/collections/... part of file (SKILL.md, references/09).
• Add an eval covering the macOS entitlement fix.

Initial release.

• AtCollection<T> — full CRUD, CItem<T>, Query<T>, sub-collections, read receipts, event streams
• wherePath / PathField<T> typed predicates
• watchWithTree / watchWithSub for deep multi-level hierarchies
• at_client_flutter auth — all 4 dialog flows (CRAM, atKeys file, device keychain, APKAM)
• AtClientManager post-auth setup
• Package selection guide (at_client, at_client_flutter, at_auth, at_chops, at_cli_commons)
• Domain-object patterns (toJson/fromJson, registerFactory, typeTag)
• Unit testing without a live atServer (collections_test_hooks.dart)
• Architecture decision guide: AtCollection<T> vs Notifications + SQLite
• 10 common pitfalls with fixes
• Deprecation guide: AtCollectionModel, at_common_flutter, at_backupkey_flutter