Initial import of LogDarioSeq baseline

Establishes version control for the personal Logseq DB fork before
starting the server-client architecture migration and domain features
described in docs/agent-guide and the approved implementation plan.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

cli/spec/commands/skill.mli

@@ -0,0 +1,37 @@
+type install_opts = { global : bool }
+type parsed = Parsed_show | Parsed_install of install_opts
+
+type action =
+  | Skill_show of { source_path : Cli_primitive.path option }
+  | Skill_install of {
+      global : bool;
+      source_path : Cli_primitive.path option;
+      destination_dir : Cli_primitive.path option;
+      destination_file : Cli_primitive.path option;
+    }
+
+type install_target = {
+  scope : Cli_primitive.keyword;
+  path : Cli_primitive.path;
+  update_command : string;
+}
+
+type update_status = {
+  installed : bool;
+  outdated : bool;
+  outdated_targets : install_target Rrbvec.t;
+  error : Error.t option;
+}
+
+val resolve_install_target :
+  global:bool ->
+  cwd:Cli_primitive.path ->
+  home_dir:Cli_primitive.path option ->
+  install_target Error.build_result
+
+val installed_skill_targets :
+  cwd:Cli_primitive.path ->
+  home_dir:Cli_primitive.path option ->
+  install_target Rrbvec.t
+
+include Command_spec.S with type parsed := parsed and type action := action