Refresh `ai.skillz` provider deployment

Move managed worktree ignores to the provider-neutral `/wkts/` root
and remove obsolete `commit-msg` session state.

Add `code-nav-refs` links and the remaining OpenCode command shims so
both provider deployments validate against the current manifest.

(this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`))

.gitignore

@@ -143,8 +143,7 @@ docs/conversations/
 # END ai.skillz: direct:symlink:opencode:gish
 
 # BEGIN ai.skillz: runtime:open-wkt
-.claude/wkts/
+/wkts/
-claude_wkts
 # END ai.skillz: runtime:open-wkt
 
 # BEGIN ai.skillz: direct:symlink:claude:open-wkt
@@ -199,7 +198,6 @@ claude_wkts
 
 # BEGIN ai.skillz: runtime:commit-msg
 .claude/skills/commit-msg/msgs/
-.claude/skills/commit-msg/conf.toml
 .claude/git_commit_msg_LATEST.md
 # END ai.skillz: runtime:commit-msg
 
@@ -359,3 +357,43 @@ claude_wkts
 # BEGIN ai.skillz: direct:symlink:opencode:command:taken-export
 /.opencode/commands/taken-export.md
 # END ai.skillz: direct:symlink:opencode:command:taken-export
+
+# BEGIN ai.skillz: direct:symlink:claude:code-nav-refs
+/.claude/skills/code-nav-refs
+# END ai.skillz: direct:symlink:claude:code-nav-refs
+
+# BEGIN ai.skillz: direct:symlink:opencode:code-nav-refs
+/.opencode/skills/code-nav-refs
+# END ai.skillz: direct:symlink:opencode:code-nav-refs
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:gish
+/.opencode/commands/gish.md
+# END ai.skillz: direct:symlink:opencode:command:gish
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:resolve-conflicts
+/.opencode/commands/resolve-conflicts.md
+# END ai.skillz: direct:symlink:opencode:command:resolve-conflicts
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:git-mgmt
+/.opencode/commands/git-mgmt.md
+# END ai.skillz: direct:symlink:opencode:command:git-mgmt
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:open-wkt
+/.opencode/commands/open-wkt.md
+# END ai.skillz: direct:symlink:opencode:command:open-wkt
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:close-wkt
+/.opencode/commands/close-wkt.md
+# END ai.skillz: direct:symlink:opencode:command:close-wkt
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:dep-supersede-scan
+/.opencode/commands/dep-supersede-scan.md
+# END ai.skillz: direct:symlink:opencode:command:dep-supersede-scan
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:harness-perf
+/.opencode/commands/harness-perf.md
+# END ai.skillz: direct:symlink:opencode:command:harness-perf
+
+# BEGIN ai.skillz: direct:symlink:opencode:command:yt-url-lookup
+/.opencode/commands/yt-url-lookup.md
+# END ai.skillz: direct:symlink:opencode:command:yt-url-lookup