fix(skill): self-review — operator detection и continuation framing

- Зачем:
  - Round 1 adversarial self-review нашёл 6 находок (3 high, 3 medium).
    Артефакт первой итерации содержал противоречия между SKILL и README,
    неточности про upstream-механики (Codex continuation, Agent Teams
    gating SendMessage), и оставлял undefined load-bearing branch
    "Operator available?". Без фиксов скилл вводил пользователей без
    Agent Teams в ступор при Round 2.
- Что:
  - SKILL Step 2: уточнено, что SendMessage gated на Agent Teams; Task
    spawn без Agent Teams one-shot; Codex поддерживает intra-session
    continuation.
  - SKILL Step 4: "REQUIRED SUB-SKILL ... if available" заменено на
    "Use ... when available" с явным fallback на inlined принципы.
  - SKILL Step 6: добавлена continuation-support table по хостам,
    восстановлена секция "Detecting an operator" с heuristic
    (interactive если direct human message + user-facing channel).
  - README: переписан Agent Teams блок под operator-gated модель; Codex
    section — корректное описание intra-session continuation через /agent.
  - EXPERIMENT.md: добавлен banner о предшествии редизайну и устаревших
    ссылках на adversarial-reviewer.md.
- Проверка:
  - Прогнать /claude-team-review в новой сессии с Agent Teams enabled
    (env var добавлен в ~/.claude/settings.json) — Round 2 для проверки
    continuation через SendMessage и operator-gating паттерна.

README.md

@@ -62,8 +62,10 @@ the same host as the lead.
 ```
 
 The lead tries to **continue the same reviewer** for re-review when the
-host supports it (cheaper — context is preserved). When continuation is
-unavailable (Codex, or Claude Code without Agent Teams), or when the
+host supports it (cheaper — context is preserved). Codex supports
+intra-session continuation natively; Claude Code requires Agent Teams
+(`CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1`) for the `SendMessage`-based
+continuation path. When continuation is unavailable, or when the
 previous reviewer is no longer reachable, the lead asks the operator
 before spawning a fresh subagent — full project re-read is expensive,
 and the operator may prefer to conclude the review unverified. Headless
@@ -129,8 +131,9 @@ ln -s "$(pwd)" ~/.claude/skills/claude-team-review
 Claude Code watches `~/.claude/skills/` for changes and will pick the
 skill up without a restart.
 
-**Optional — enable Agent Teams for cheaper re-review** (continuation
-between rounds instead of fresh-spawn). Add to your Claude Code settings:
+**Recommended — enable Agent Teams** for cheaper re-review. Continuation
+across rounds uses `SendMessage`, which is gated on Agent Teams. Add to
+your Claude Code settings:
 
 ```json
 {
@@ -140,9 +143,11 @@ between rounds instead of fresh-spawn). Add to your Claude Code settings:
 }
 ```
 
-The skill works fine without Agent Teams — it falls back to a fresh
-subagent each round, with the previous-rounds context block packed into
-the briefing.
+Without Agent Teams, the Task-tool spawn is one-shot — every Round 2+
+re-review goes through the operator-gated fresh-spawn path (the operator
+decides between spawning a fresh subagent that re-reads the project, or
+concluding the review unverified). Headless runs without an operator
+conclude as `NOT VERIFIED`.
 
 ### Codex
 
@@ -155,11 +160,12 @@ mkdir -p ~/.codex/skills
 ln -s "$(pwd)" ~/.codex/skills/claude-team-review
 ```
 
-Codex spawns subagents without context continuation across spawns. The
-skill treats every re-review on Codex as an operator-gated decision —
-the lead asks whether to spawn a fresh subagent (full project re-read,
-expensive) or conclude without verification. Continuation can be added
-later if Codex grows that feature.
+Codex supports intra-session continuation natively — the lead can send
+follow-up instructions to a running subagent thread (use `/agent` to
+switch between active threads). The skill uses this for cheap re-review.
+When the previous subagent thread is no longer active, Round 2+ goes
+through the operator-gated fresh-spawn path (operator decides: spawn
+fresh with a full project re-read, or conclude unverified).
 
 ## Usage