docs: review-loop-run script memory + review-loop skill uses it

Claude-Session: https://claude.ai/code/session_018LRh1S2bHJYhEgrMu3UJx8

memory/script-review-loop-run.md

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+# review-loop-run
+
+**Purpose:** Launch and track detached MiniMax M3 reviews of `/review-loop` artefacts (verify / plan / spec / tests / code) from a fixed prompt template per kind, so sessions stop hand-writing prompt files, launcher scripts and (fatally) `pkill`s.
+
+**Location:** `small-scripts/scripts/review-loop-run` → `~/sbin/review-loop-run`; spec `small-scripts/specs/review-loop-run.spec.md`; test `tests/test-review-loop-run.sh`.
+
+## Usage
+
+```
+review-loop-run launch --kind spec --name spec-BC --round 2 --file /tmp/x/spec-BC.diff --context "…"
+review-loop-run status --name spec-BC
+review-loop-run counts <result.md>        # exit 4 when CRITICAL+HIGH > 0
+```
+
+Files: `${XDG_RUNTIME_DIR:-/tmp}/review-loop/<repo>/<tag>-r<N>-{prompt.txt,launch.sh,stdout.txt,result.md}`. Round ≥2 auto-adds the previous round's result and the "do not re-raise adjudicated findings" paragraph.
+
+## How it works
+
+- One task template per kind (the `spec` template excludes the "symbol does not exist yet" class for spec-ahead specs; `tests` adds `Bash(python3 -m pytest *)`; `verify` adds `git show`).
+- Default reading set per kind from `best-practices/` + the project's `memory/gotchas-*.md`; absent files are skipped and reported in `--dryrun`.
+- Launch is a generated `<tag>-launch.sh` run under `setsid nohup`; the stdout file ends with `exit=N`. Kill by PID from the launch script's process, never by pattern.
+- `counts` parses table rows, `- **SEV:** n` lists, or heading counts as a last resort.
+
+## Gotchas
+
+- `pkill -f 'MiniMax-M3'` kills the invoking shell — the reason this script exists. Never reintroduce it.
+- MiniMax reviews take 5–10 min for ~15 input files; schedule a wakeup rather than polling.
+- `counts` heuristics depend on the reviewer honouring "end with a count by severity"; the prompt asks for it, but spot-check the result on the first round of a new kind.
+
+**Used by:** `/review-loop` (custom-claude-skills).