handoff

1# Handoff
2 
3Transfer the owner's task, current state and existing authority to one receiving agent.
4The owner is whoever owns the work, usually the user.
5**The receiver does not edit until explicit release.** After verified release the sender stops execution; it does not supervise or wait for completion.
6 
7Use the installed Reach guide and `sno reach --help` for exact card syntax and command
8arguments. [The bundled contract](references/reach-contract.json) bounds the text self-test;
9it does not prove an installed runtime. Confirm `sno reach --version` and the required
10runtime before creating a receiver. If unavailable, retain ownership and report the missing
11input. No runtime or installation is bundled with this skill.
12 
13Install/update through `sno setup`; install any named missing prerequisite before transferring ownership.
14On macOS use the corresponding Homebrew formula: `bash`, `coreutils`, `findutils`,
15`gnu-sed`, `gnu-tar`, `flock`, `tmux`, `jq`, or `util-linux`; follow the installed guide's
16GNU command PATH instructions. Windows requires WSL.
17 
18## Three entry shapes
19 
20A is the outgoing executor; B is the receiving executor. Seat, card, ring, X-Work and
21Message-ID are Reach terms, defined in the `reach` skill.
22 
23- **Card-backed work:** A owns a real original work card. Record its path, Message-ID and
24  X-Work. Choose a continuing reply recipient R, normally the original requester, who stays
25  registered after A leaves. The original card's Reply-To, when present, determines its
26…