Add continuity-guard skill skeleton and doctor script

skills/continuity-guard/references/doctor-spec.md

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+# continuity doctor spec
+
+## PASS
+The checked item exists and matches the required structure.
+
+## WARN
+The item exists but is drifting:
+- file too long
+- required text partly missing
+- structure present but not ideal
+
+## FAIL
+The item is missing or materially broken:
+- missing CURRENT_STATE.md
+- missing required sections
+- missing continuity rules in AGENTS.md
+
+## Minimal checks
+1. `main/memory/CURRENT_STATE.md` exists
+2. each agent workspace has `memory/CURRENT_STATE.md`
+3. every `CURRENT_STATE.md` contains:
+   - `## In Flight`
+   - `## Blocked / Waiting`
+   - `## Recently Finished`
+   - `## Next`
+   - `## Reset Summary`
+4. main `AGENTS.md` contains continuity guidance and dual reporting protocol markers
+5. line-count caps are respected
+
+## Suggested actions on failure
+- create missing files from template
+- restore missing AGENTS continuity section
+- trim oversized CURRENT_STATE files
+- rerun doctor after repair