chore(ai): initialize project notes and Claude tooling surfaces

Replace the seed notes.org with project-specific context (layout, install modes, task tracker location, recent inflection point). Bring in the synced template surfaces (protocols, workflows, scripts, references, retrospectives, someday-maybe) as tracked content for this content/documentation project.

1 files changed, 134 insertions, 0 deletions

diff --git a/.ai/scripts/cross-agent-comms/cross-agent-halt b/.ai/scripts/cross-agent-comms/cross-agent-halt
new file mode 100755
index 0000000..df25115
--- /dev/null
+++ b/.ai/scripts/cross-agent-comms/cross-agent-halt
@@ -0,0 +1,134 @@
+#!/usr/bin/env python3
+"""Failsafe halt for cross-agent comms.
+
+See cross-agent-halt.md. Touches ~/.config/cross-agent-comms/HALT and stops
+the cross-agent-watch systemd user service. With --tailnet, propagates the
+HALT file to every peer in peers.toml via SSH; reports per-peer status with
+non-zero exit on partial halt.
+
+Does NOT pkill in-flight scripts — they detect HALT on next iteration and
+stop themselves.
+"""
+
+from __future__ import annotations
+
+import argparse
+import subprocess
+import sys
+import tomllib
+from pathlib import Path
+
+CONFIG_DIR = Path.home() / ".config" / "cross-agent-comms"
+HALT_FILE = CONFIG_DIR / "HALT"
+PEERS_TOML = CONFIG_DIR / "peers.toml"
+
+EXIT_OK = 0
+EXIT_PARTIAL = 1
+
+
+def err(msg: str) -> None:
+    print(msg, file=sys.stderr)
+
+
+def write_halt_file(reason: str) -> None:
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    HALT_FILE.write_text((reason + "\n") if reason else "")
+
+
+def stop_watcher_service() -> None:
+    """Best-effort stop of the systemd watcher service. Failures are logged but not fatal."""
+    try:
+        subprocess.run(
+            ["systemctl", "--user", "stop", "cross-agent-watch.path"],
+            capture_output=True, text=True, timeout=5,
+        )
+    except (FileNotFoundError, subprocess.TimeoutExpired):
+        # Watcher service may not be installed — fine.
+        pass
+
+
+def load_peers() -> dict:
+    if not PEERS_TOML.exists():
+        return {}
+    try:
+        return tomllib.loads(PEERS_TOML.read_text())
+    except (tomllib.TOMLDecodeError, OSError) as e:
+        err(f"cannot parse peers.toml: {e}")
+        return {}
+
+
+def ssh_touch_halt(host: str, ssh_user: str | None, reason: str) -> tuple[bool, str]:
+    target = f"{ssh_user}@{host}" if ssh_user else host
+    # Build the remote command. Quote the reason carefully.
+    remote_cmd = (
+        f"mkdir -p ~/.config/cross-agent-comms && "
+        f"printf %s {_sh_quote(reason)} > ~/.config/cross-agent-comms/HALT"
+    )
+    try:
+        result = subprocess.run(
+            ["ssh", "-o", "ConnectTimeout=3", "-o", "BatchMode=yes", target, remote_cmd],
+            capture_output=True, text=True, timeout=10,
+        )
+    except (FileNotFoundError, subprocess.TimeoutExpired):
+        return False, "ssh unavailable or timed out"
+    if result.returncode == 0:
+        return True, "HALT file written"
+    return False, (result.stderr.strip().splitlines() or [f"exit {result.returncode}"])[-1]
+
+
+def _sh_quote(s: str) -> str:
+    return "'" + s.replace("'", "'\"'\"'") + "'"
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="Halt all cross-agent comms on this machine (and optionally tailnet).")
+    parser.add_argument("reason", nargs="?", default="", help="Optional human-readable reason")
+    parser.add_argument("--tailnet", action="store_true",
+                        help="Propagate HALT to every peer in peers.toml")
+    args = parser.parse_args()
+
+    # Local halt.
+    write_halt_file(args.reason)
+    stop_watcher_service()
+    print("Halting locally       ✓ (HALT file written)")
+
+    if not args.tailnet:
+        print()
+        print(f"Halt active. Remove {HALT_FILE} or run cross-agent-resume to clear.")
+        print("Agent polling will stop within ~5 min (one cadence cycle).")
+        return EXIT_OK
+
+    peers = load_peers().get("peers", {})
+    if not peers:
+        print()
+        print("No peers configured in peers.toml — local-only halt complete.")
+        return EXIT_OK
+
+    print()
+    successes = 1  # local already counted
+    failures = []
+    for name, cfg in sorted(peers.items()):
+        host = cfg.get("host", name)
+        ssh_user = cfg.get("ssh_user")
+        ok, detail = ssh_touch_halt(host, ssh_user, args.reason)
+        marker = "✓" if ok else "✗"
+        print(f"Halting {host:<28} {marker} ({detail})")
+        if ok:
+            successes += 1
+        else:
+            failures.append(f"{name} ({host}): {detail}")
+
+    print()
+    total = len(peers) + 1
+    if failures:
+        print(f"PARTIAL HALT: {successes}/{total} machines halted.")
+        for f in failures:
+            print(f"  - {f}")
+        print("Resolve the failures or manually halt each machine.")
+        return EXIT_PARTIAL
+    print(f"Halt active across {total} machine(s).")
+    return EXIT_OK
+
+
+if __name__ == "__main__":
+    sys.exit(main())