Memory Capture

Memory Capture

Capture the gist of a working thread — the decisions made, insights surfaced, and context built — into a single coherent Basic Memory note that reflects where the thread has landed.

Purpose

A thread has a beginning, middle, and end. Things change as the conversation progresses: an early decision gets revised, a problem looks different in light of new information, a trade-off is settled differently than it first seemed. When this skill is invoked, capture the current state of understanding, not the history of how it got there.

If the skill is invoked more than once in the same thread, the same note is rewritten so it stays coherent — not appended to. The result should read top-to-bottom as a single document about the thread's outcome, with brief prose where a meaningful change is worth acknowledging.

When to Use

Typical timing is mid-thread or end-of-thread, after enough has been settled to be worth preserving.

Use this skill when:

• Key decisions have been made and shouldn't evaporate when the thread closes
• A design, debugging, or planning discussion has produced something concrete
• The user explicitly asks to capture, save, or remember what's been discussed
• Toward the end of a session, to summarize the outcome

It is fine — and expected — to invoke this skill multiple times in the same thread as the conversation evolves.

Same-Thread Detection

To rewrite the same note on re-capture instead of duplicating, key the note to a stable thread_id in its frontmatter.

If your agent exposes a stable session or thread id, store it as thread_id so subsequent captures within the same thread find and rewrite the same note. Any value that stays constant for the duration of the thread works — a session UUID, a conversation id, a ticket number the work is scoped to.

Example (hosts with a JSONL transcript): some agents write a per-session transcript whose filename is a stable session UUID. If yours does, you can derive the id from the most-recently-modified transcript file and use it as thread_id. This is optional — only do it if your host actually exposes such a transcript.

If no stable id is available, match the existing note by title/topic instead: search for a note covering the same thread (search_notes(query="<topic>")), and if you find the one this thread already produced, rewrite it. Omit thread_id and rely on a consistent title.

Decision Flow

1. Determine the thread key. Use a stable session/thread id if your agent exposes one; otherwise plan to match by title/topic.
2. Search Basic Memory for the existing thread note.
   • With a thread id, use metadata_filters (not query) — full-text query doesn't reliably match YAML frontmatter custom fields:

     search_notes(
         metadata_filters={"thread_id": "<thread-id>"},
         project="<project>"
     )

   • Without one, search by topic and identify the note this thread already produced:

     search_notes(query="<thread topic>", project="<project>")

3. If a match is found:
   • Read the existing note (use the full permalink returned by search)
   • Synthesize a new version that integrates the latest understanding from the conversation
   • Overwrite via write_note with overwrite=True (same title, same thread_id if used, same directory)
4. If no match is found:
   • Synthesize the note from the conversation
   • If you have a thread id, pass metadata={"thread_id": "<thread-id>"} to write_note (it surfaces as a custom frontmatter field)
   • Save it

Synthesis Rules

When updating an existing thread note, synthesize, don't append:

• Decisions that are still current → keep, possibly refined
• Decisions that have been superseded → replaced inline (the new one goes where the old one was)
• Significant revisions that deserve explanation → a sentence woven into the relevant section, not an appended changelog
• Outdated context → removed

Goal: the note reads top-to-bottom as a single coherent document. A reader who never saw the conversation should still understand the outcome from the note alone. There is no ## Changes section at the bottom; revisions live in the prose where they're relevant.