Add AI agent session/state files to Agents.gitignore

The existing template comments out most agent paths because some are
team configuration. The entries added here are not: they are session
transcripts, chat history, caches, and local settings that AI coding
tools write into the working tree, like the aider history files the
template already ignores unconditionally.

Covered: Claude Code (.claude.json, session/todos/projects/statsig/
shell-snapshots/history), Codex (sessions, history, logs), Cursor
(chats, logs, session state), Continue sessions, and the .agent/,
.copilot/, .playwright-mcp/, .remember/, .specstory/, and
.superpowers/ state directories. The list is cross-checked against
the aimhooman rule catalog, which tests each pattern against real
repositories.

Global/Agents.gitignore

@@ -13,6 +13,10 @@
 # OpenAI Codex
 # AGENTS.md
 # .codex/
+.codex/sessions/
+.codex/history*
+.codex/log/
+.codex/logs/
 
 # Aider
 .aider.input.history
@@ -22,8 +26,15 @@
 # .aiderignore
 
 # Claude Code
+.claude.json
 .claude/*.local.json
 .claude/**/*.log
+.claude/history*
+.claude/session*.json
+.claude/todos/
+.claude/projects/
+.claude/statsig/
+.claude/shell-snapshots/
 CLAUDE.local.md
 # .claude/
 
@@ -33,12 +44,16 @@ gemini-debug.log
 # .gemini/
 
 # Cursor AI
+.cursor/chats/
+.cursor/logs/
+.cursor/session*
 # .cursorrules
 # .cursor/
 # .cursor.json
 # .cursor-settings.yaml
 
 # Continue
+.continue/sessions/
 # .continue/
 # .continuerc.json
 
@@ -56,6 +71,14 @@ gemini-debug.log
 # .tabnineignore
 # .tabnine/
 
+# Other agent session and state directories
+.agent/
+.copilot/
+.playwright-mcp/
+.remember/
+.specstory/
+.superpowers/
+
 # GitHub Copilot
 # .github/copilot-instructions.md