feat(skills): import core skills from .agents catalog

- Add junior-to-senior with research playbook and review rubric
- Add fuck-slop with tell catalog and multi-register voice profiles
- Add interface-kit with design engineering, motion, and a11y references
- Add app-security with 4-pillar upload defense and hardening playbooks
- Add debugging-workflow with systematic root cause isolation
- Standardize all skills to 5-phase Skill Architect protocol
- Sync symlinks to OpenCode, Codex, and Claude Code

skills/app-security/references/review-checklist.md

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+# Security Review & OWASP Verification Checklist
+
+## Input Validation & Boundaries
+- [ ] Pydantic schemas enforce hard string bounds (max 50,000 for text, max 200 for titles).
+- [ ] Dynamic path/query identifiers validated via `sanitize_identifier()`.
+- [ ] Pagination limits clamped to `1 <= limit <= 50`.
+- [ ] Batch array inputs clamped to safe upper bounds (max 100–200 items).
+
+## Four-Pillar Upload Defense
+- [ ] Uploads restricted by `DEFAULT_MAX_FILE_SIZE` (100MB; 5MB for images).
+- [ ] Blocked executable extensions rejected (`BLOCKED_EXTENSIONS`).
+- [ ] Extension checked against `ALLOWED_EXTENSIONS`.
+- [ ] Header magic bytes inspected (`check_magic_bytes`) to block disguised binaries.
+- [ ] Filenames sanitized with `sanitize_filename()` (path traversal and CLI injection stripped).
+- [ ] Disk writes resolved strictly via `safe_resolve_path()`.
+
+## SSRF Defense
+- [ ] All outbound requests in research/web-retrieval validated with `validate_safe_url()`.
+- [ ] Loopback (`127.0.0.1`), private RFC 1918 subnets, and cloud metadata (`169.254.169.254`) blocked.
+- [ ] Scheme restricted strictly to `http` and `https`.
+
+## Secrets & Data Hygiene
+- [ ] Zero API keys, bearer tokens, or password hashes written to `error_log` or logs.
+- [ ] Authorization headers masked in logging formatters (`Bearer ***`).
+- [ ] Production error responses mask internal database paths and raw tracebacks.
+
+## Authorization & State Safety
+- [ ] Mutations verify that target records match the active session / conversation scope.
+- [ ] SQLite queries use parameterized SQL; no raw string concatenation.
+- [ ] Rate limits applied on expensive inference and digestion endpoints.