add memory skill

Tells the model when and how to proactively use memory_remember
and memory_recall.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

memory/SKILL.md

@@ -0,0 +1,42 @@
+---
+name: memory
+intent: remember, recall, memory, persist, forget
+description: Guidance on using memory_remember and memory_recall to persist and retrieve information across sessions.
+---
+
+# Memory
+
+Use `memory_remember` to persist facts that would otherwise be lost when the session ends. Use `memory_recall` to search for relevant context at the start of a new topic or when the user references something you may have stored before.
+
+## When to remember
+
+- The user states a preference, constraint, or decision that affects future work
+- You learn a non-obvious fact about the codebase, system, or environment
+- A debugging session surfaces a root cause worth keeping
+- The user explicitly asks you to remember something
+
+Do not remember ephemeral task state, things derivable from the current codebase, or things already in git history.
+
+## When to recall
+
+- The user references something that sounds like prior context ("like last time", "the one we discussed", "what we decided about X")
+- Starting work in an area where stored context might exist
+- The user asks what you know about a topic
+
+## How to use
+
+```
+execute_tool: memory_remember
+args: ["<title>", "<tags_csv>", "<body>"]
+```
+
+- `title`: short noun phrase describing the memory
+- `tags_csv`: comma-separated tags; pick specific and reusable terms
+- `body`: the fact or context worth keeping, written so it stands alone
+
+```
+execute_tool: memory_recall
+args: ["<query>"]
+```
+
+- `query`: keyword, tag, or phrase — searches both filenames and body content