Add ~/.omp config; nvim git-repo external; ya pkg install hook

- dot_omp: agent config/keybindings/mcp/themes/commands + loop defs,
  goals, run-loop.sh; dotstate config.yml symlink materialized; dbs,
  logs, sessions, memories, blobs, caches, .env (secret), and
  managed-skills excluded
- .chezmoiexternal.toml: prdlk/nvim as git-repo external — no
  refreshPeriod + ff-only pull, local checkout wins over remote
- yazi plugins: vendored source copies dropped (target-ignored already);
  package.toml is the manifest, installed via run_onchange ya pkg
  install hook; stale piper/easyjump pins bumped to match live content
- herdr: plugins/github checkout, logs, session.json, .bak,
  release-notes dropped from sync (herdr-managed machine state)

dot_omp/loops/bin/executable_run-loop.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# run-loop.sh <loop-name> — one round of a loop, cheap-model-first with Fable escalation.
+# Green loops only: prompts are read-only + write-to-own-state-file by design.
+set -euo pipefail
+
+LOOP="${1:?usage: run-loop.sh <loop-name>}"
+DIR="$HOME/.omp/loops/$LOOP"
+PROMPT="$DIR/loop.md"
+STATE="$DIR/state.md"
+LOG="$DIR/runs.log"
+[[ -f "$PROMPT" ]] || { echo "no such loop: $LOOP" >&2; exit 1; }
+[[ -f "$STATE" ]] || printf '# %s — state\n\n## queue\n\n## done\n\n## blocked\n' "$LOOP" > "$STATE"
+
+# Hard caps (loop #21 escalation policy + the article's stop rules):
+#  - smol model runs the routine round, 10 min wall clock
+#  - Fable (default model) only re-runs on an explicit ESCALATE marker, 20 min cap
+#  - one escalation max per round; never more than one round per invocation
+SMOL_MAX=600
+FABLE_MAX=1200
+
+ts() { date -Is; }
+run() { # run <model-flag...> — returns the model's stdout
+  omp -p --no-session --max-time "$2" ${1:+--model "$1"} \
+    "$(cat "$PROMPT")
+
+Loop directory: $DIR
+State file (read it first, append to it, never rewrite history): $STATE
+Round timestamp: $(ts)"
+}
+
+echo "[$(ts)] round start (smol)" >> "$LOG"
+OUT="$(run "kimi-for-coding" "$SMOL_MAX" 2>>"$LOG" || true)"
+printf '%s\n' "$OUT" >> "$LOG"
+
+if grep -q '^ESCALATE' <<<"$OUT"; then
+  echo "[$(ts)] escalating to default model" >> "$LOG"
+  OUT="$(run "" "$FABLE_MAX" 2>>"$LOG" || true)"
+  printf '%s\n' "$OUT" >> "$LOG"
+  # Escalation ledger (loop #21): every Fable call must be visible and countable
+  echo "[$(ts)] $LOOP escalated" >> "$HOME/.omp/loops/escalations.log"
+fi
+
+echo "[$(ts)] round end" >> "$LOG"