save-zk

Run only on explicit invoke: save-zk or /save-zk. No other phrases.

Phases A → I in order. Never skip or reorder. After Phase A, write immediately (no second confirm). Dry-run only if the user asked.

Load references on demand: references/note-template.md, references/living-head.md, references/session-context.md.

Phase A — Note Key gate

1. Suggest candidates from branch name, open PR/issue, or session materials when present.
2. Human supplies or confirms the Note Key (tracker id) or a ≤8-word slug.
3. Never invent or silently pick a key. Stop until confirmed.

Done when: confirmed Note Key/slug in hand.

Phase B — Gather Session Context

This session only. Fan out reads in parallel when independent.

Mark each source present or unavailable. Details: references/session-context.md.

Done when: every candidate source is present or marked unavailable.

Phase C — Note Lookup

Prefer tag match on the issue key; filename match is fallback.

Issue-key Note Keys must be (or become) frontmatter tags.

Done when: create vs update decided and target path known (or create path planned).

Phase D — Daily Note resolve

zk daily

Record Daily Note path, or mark unavailable (do not invent a path).

Done when: path known or explicitly unavailable.

Phase E — Distill

Compose per references/note-template.md + references/living-head.md.

• Create: full Living Head + top-level Deep Context <details>. No Update section.
• Update: replacement Living Head + one new ## Update: YYYY-MM-DD delta only. Do not rewrite prior Updates or frozen create-time Deep Context.
• Concision: shortest form that still carries meaning. No Task Matrix section.

Done when: markdown body ready to write.

Phase F — Visual Section

Include in Living Head only when multi-component structure/flow or numeric metrics apply:

1. Reuse d2 / mermaid fences already in Session Context.
2. Else draft a minimal fence or metric table in-note.
3. Omit or clear when N/A.

No asset files, no base64, no hard dependency on diagram/visualize CLIs.

Done when: Visual present, cleared, or omitted with reason N/A.

Phase G — Related Links

Best-effort real [[wikilinks]] from notebook search + link to today's Daily Note. Never invent titles. Omit non-daily related links if none.

Done when: links list final (may be Daily-only).

Phase H — Write

1. Session Note (primary)
   • Create: prefer zk new into the single Session Note Location (key-agnostic; parameterize with Note Key). On zk new failure, write markdown under the notebook projects path and report fallback.
   • Update: replace only the Living Head; append the new Update at the bottom.
2. Daily Note (best-effort): append one back-link line that the Session Note was created or updated. On Daily failure: keep Session Note, warn. On Session Note failure: skip Daily.

Done when: Session Note write attempted; Daily attempted if Session succeeded.

Phase I — Report

Paths written + BLUF + any Daily warning. If user asked dry-run, show composed markdown and paths only — no writes.

Done when: human sees report.

Safety contract

1. May replace only the Living Head.
2. Must not alter, delete, or reorder prior Updates or frozen create-time Deep Context.
3. Must not delete Session Note, Daily Note, or session sources.
4. If unsure content already exists → append or mark <!-- possibly duplicate — review -->.
5. No worktree removal, git cleanup, tracker transitions, or other notebook edits.