Relocate Claude adapter under adapters/ and add subagent set

Move the Claude command/agent files from claude/ to adapters/claude/ to
match the adapters/<vendor>/ layout, and add the subagent definitions
(evaluator, exerciser, researcher, reviewer, security-auditor,
start9-spec-checker) plus the full-eval command wrapper.

adapters/claude/commands/full-eval.md

@@ -0,0 +1,19 @@
+---
+description: Run the full evaluation suite (evaluator, security-auditor, exerciser, spec-checker) in parallel and synthesize one prioritized report
+argument-hint: [optional focus area, e.g. "focus on the API layer"]
+---
+
+Run a full independent evaluation of the repository in the current working directory.
+Focus area, if any: $ARGUMENTS
+
+Your complete orchestration guide — phases, agent roster, synthesis rules, and the
+EVALUATION.md format — is at:
+
+    ~/Projects/standards/guides/full-eval.md
+
+Read it in full first, then follow it exactly. If you cannot read that file, stop and
+report precisely that — do not improvise the evaluation.
+
+Claude Code specifics for Phase 2: launch the subagents simultaneously in a single
+batch; run the exerciser in the foreground if permission prompts are likely (it needs
+Bash approval, and background runs auto-deny prompts).