diff --git a/agent-memory/AI Agent Memory Systems MOC.md b/agent-memory/AI Agent Memory Systems MOC.md
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--- a/agent-memory/AI Agent Memory Systems MOC.md	
+++ b/agent-memory/AI Agent Memory Systems MOC.md	
@@ -110,6 +110,8 @@ A map of content for understanding how AI agents remember, retrieve, and reason
 
 * [[Claude-Mem]] -- 79K stars, user-integrated memory with real retrieval, portable despite Claude branding
 
+* [[Codex-Maxxing]] -- Jason Liu's knowledge-work setup; vault-as-memory with git diff as the review interface
+
 ## Analysis
 
 * [[User-Integrated Memory Gap]] -- the missing product category between grassroots and middleware
diff --git a/agent-memory/Codex-Maxxing.md b/agent-memory/Codex-Maxxing.md
new file mode 100644
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+++ b/agent-memory/Codex-Maxxing.md
@@ -0,0 +1,78 @@
+---
+tags: [pattern, knowledge-work, obsidian, codex, grassroots]
+created: 2026-05-28
+source: https://jxnl.co/writing/2026/05/10/codex-maxxing/
+---
+
+# Codex-Maxxing
+
+A May 2026 article by Jason Liu (OpenAI Codex team) on pushing an agentic coding
+tool past software development into general **knowledge work**, with a markdown
+vault as the agent's persistent memory. A concrete, single-user instance of the
+[[User-Integrated Memory Gap|user-integrated]] pattern and the broader
+[[Obsidian Vaults as Agent Memory|vault-as-memory]] practice.
+
+## Knowledge-Work Workflows
+
+Most of these are not "write code":
+
+- **Chief-of-Staff thread** -- monitors Gmail and Slack every ~30 min, prioritizes
+  messages, researches answers, and drafts replies *without sending*.
+- **Research & writing** -- raw voice transcripts become starting material for posts.
+- **Social monitoring** -- a dedicated pinned thread watching Twitter.
+- **Artifact production** -- Slidev decks, PDFs, spreadsheets, HTML.
+- **Animation review loop** -- watches Slack feedback every ~15 min, re-renders with
+  Remotion, re-uploads the new cut.
+- **Customer support** -- autonomously negotiates an Amazon refund, polling chat and
+  tightening cadence once a human agent joins.
+- **Project coordination** -- tracking people, decisions, and project state.
+
+## Primitives
+
+- **Pinned megathreads + compaction** -- one long-running thread per workstream
+  accumulates history, preferences, and old decisions ("not free" in token cost).
+- **Voice input** -- captures "the unedited version of my thinking," not for typing
+  convenience.
+- **Steering** -- add direction *while* the agent works instead of waiting between steps.
+- **Heartbeats** -- recurring, self-scheduling automation with dynamic cadence.
+- **Remote control** -- drive the agent from anywhere to preserve momentum.
+
+## Memory Architecture
+
+An Obsidian vault kept as a **GitHub repo**, separate from any code repo --
+"repositories hold code, the vault holds rolling context":
+
+```
+vault/
+├── TODO.md
+├── people/
+├── projects/
+├── agent/
+└── notes/
+```
+
+- An `AGENTS.md` (the Codex analogue of `CLAUDE.md`) carries the standing rule:
+  update the relevant page as you learn about people, make progress, make a decision,
+  or close an open loop.
+- **Git diff is the review interface** -- reading the diff shows "what it thought was
+  important enough to remember," rather than letting threads quietly accumulate vibes.
+- Files-as-memory give **durability**: if a thread dies, compacts badly, or gets too
+  expensive, the knowledge survives on disk.
+
+## Principles
+
+- "The more [the agent] gets places to remember, revisit, inspect, and act, the less my
+  work dies between prompts."
+- **Operating loops, not one-shots** -- wire tools together into a feedback loop.
+- **Strong goals need an oracle** -- "A weak goal is 'implement the plan in this Markdown
+  file.' A strong goal has a real success criterion." Execution is only as good as the
+  goal and the verification.
+- **Artifacts as interface** -- inspect and annotate the rendered thing, don't describe it.
+
+## See Also
+
+- [[Obsidian Vaults as Agent Memory]] -- the broader grassroots practice
+- [[User-Integrated Memory Gap]] -- the market category this exemplifies
+- [[Why Obsidian for Agent Memory]] -- platform properties it relies on
+- [[Karpathy LLM Wiki]] -- the other viral vault-as-memory pattern
+- [[Claude Managed Agents Memory Store]] -- the productized file-based precedent