docs: memory + usage docs for review-minimax and ci-triage-minimax offloads

Four memory docs (2 skills, 2 wrapper scripts) + MEMORY.md index lines;
ask-minimax-usage.md gains both delegation targets. Records the gac
v0.0.2.10 token-discovery gap (needs GITEA_TOKEN_FILE pointed at
ai_admin/token; the wrapper defaults it).

Claude-Session: https://claude.ai/code/session_01Ku87DDWwbJkTx6SuV3sQDc

memory/skill-review-minimax.md

@@ -0,0 +1,33 @@
+# /review-minimax Skill
+
+**Purpose:** Delegate a first-pass code review of a git branch (agent-produced worktrees from mm-worktree-task, ralph, container agents) to a MiniMax M3 sub-session. The diff and context reads cost MiniMax tokens; only a findings file returns, which the operator adjudicates. A pre-filter before `/code-review` or an in-session review — never the final authority.
+
+**Location:** `custom-claude-skills/skills/review-minimax/` — thin wrapper over `review-minimax-run` (small-scripts), which owns all mechanics.
+
+## Usage
+
+`/review-minimax <worktree-path> [--profile agent-runtimes]` → runs:
+
+```
+review-minimax-run --worktree <path> [--base main] [--profile agent-runtimes]
+```
+
+Findings land in `${XDG_RUNTIME_DIR:-/tmp}/review-minimax/<repo>/<branch>-findings.md`.
+
+## Key design points
+
+- **The wrapper materialises the diff itself** (`base...HEAD`, three-dot, with `:(exclude)` pathspecs for secrets/keys); the sub-session gets `Read,Glob,Grep,Write` only — no Bash, no Edit — so it can't run git, inherit the wrong branch, or modify the tree. A post-run `git status --porcelain` assertion catches any unexpected write (exit 2).
+- **Credential gate:** a diff matching credential patterns (`ghp_`, `AKIA…`, private-key headers, `x-access-token:` …) aborts with exit 1 — review in-session instead.
+- **Result gate:** findings need a `### [BLOCKER|SHOULD-FIX|NIT]` block plus at least one citation resolving against the worktree, or the literal `NO FINDINGS`; otherwise exit 3.
+- **Checklist is explicit patterns** (llm-code-security §10/§12 distilled), not "find problems" — MiniMax reasoning-loops on open-ended analysis. The 5 recurring MiniMax test-file bugs load only under `--profile agent-runtimes`.
+- **Exit contract** 0/1/2/3 mirrors explore-minimax-run; fallback on 2/3 is a Claude Sonnet subagent review.
+- **Adjudication is mandatory:** findings are untrusted data; spot-check 1–2 citations; `NO FINDINGS` does not certify the branch.
+
+## Which modes use it
+
+`deep`/`deep-fable` post-agent-merge review, `orch` for reviewing container-agent branches before merge. Related: [[script-review-minimax-run]], [[skill-explore-minimax]], [[skill-ci-triage-minimax]].
+
+## Gotchas
+
+- Synchronous with a 540s internal timeout (harness Bash 600s cap) — the diff budget (`--max-diff-lines`, default 6000) keeps runs inside that; oversize diffs exit 1 rather than half-review.
+- `Write` must stay in the sub-session allowlist: without it MiniMax exits 0 and the findings file silently never appears (gotchas-minimax).