compact-save

name	compact-save
description	Snapshot current task state to MemPalace before context compaction. Triggered by PreCompact hook or manually.
type	Engineer (light)

Compact-Save

Type: Engineer (light)
Requires: MemPalace MCP server

Snapshot the current conversation's task state to MemPalace so work context survives context compaction. Unlike the old stash/unstash pair, this is a minimal automated record — no manual resume step needed.

When this runs

• Automatically — via PreCompact hook before Claude Code compacts the context window
• Manually — user says /compact-save, "save state", or "збережи стан"

Steps

Step 1: Detect wing

Derive wing from working directory basename (strip leading dots → lowercase → match wings list). If ambiguous, prompt the user.

Step 2: Collect state from conversation context

• task — 1–2 sentences: what is the active task right now?
• files_modified — list of files edited or created this session (from recent tool calls)
• last_decision — the most recent key decision or finding (1 sentence)
• next — the immediate next action after restore

Step 3: Save to MemPalace

Call mempalace_add_drawer with:

• wing: detected wing
• room: "compact-save"
• name: "compact-save-<ISO timestamp>"
• content: a single YAML string:

task: "<task>"
files_modified:
  - <path>
last_decision: "<last_decision>"
next: "<next>"
created_at: "<ISO 8601 timestamp>"

If files_modified or any optional field is empty → include the key with an empty string or empty list. Do not omit keys.

Step 4: Confirm

For manual invocation: output Compact-save recorded for wing <wing>.

For automatic invocation (PreCompact hook): execute silently — no user-facing output needed.

Failure modes

• MemPalace unreachable → output a one-line warning and continue. Compact-save is insurance, never a blocker.