Write a handoff document summarising the current conversation so a fresh agent can continue the work. /receive picks it up.

Where to save

If ~/Obsidian/ exists — write to ~/Obsidian/Handoffs/<YYYY-MM-DD-HHMM>-handoff.md. The vault is the store because it is the only surface constant across every machine; the handoff is transport through it, not a page in it. Wikilink the pages the next session will need ([[Perivale Apartment - Hoover Building]], [[GymBuddies]], …) as plain pointers. The handoff is Class B working context — never write Class A (secrets, credentials, customer PII, verbatim proprietary source). File paths + SHAs are fine here (B-private) and often exactly what the next session needs.
If the vault is absent — fall back to mktemp -t handoff-XXXXXX.md.

Read the file before you write to it.

Content

Suggest the skills the next session should use. Do not duplicate content already captured in other artifacts (specs, plans, ADRs, issues, commits, diffs) — reference them by path or URL instead.

If the user passed arguments, treat them as a description of what the next session will focus on and tailor the doc accordingly.

Discarded as noise

Write the dead ends down: hypotheses ruled out, approaches tried and abandoned, and why each was dropped. This is the section that earns the handoff — it is the one thing /compact cannot express, and without it the next session re-walks paths this one already closed.