Codex
Use Codex playbooks to standardize strategy and guide Lumo recommendations.
By Sebastian StreiffertPublished Jan 10, 2026Updated May 29, 20268 min read
What Is Codex?
Codex is Lumenbase's playbook layer for repeatable AI-guided execution. It lets teams define strategic context and operational patterns that Lumo uses for Feed recommendations, task execution, and team alignment.
Instead of ad-hoc instructions, Codex centralizes how your team wants actions framed, prioritized, and executed. The same contact can receive different recommendations depending on which Codex is applied to the list they belong to.
How to Create a Codex
Open Lists → Codexes and click Create Codex. A dialog opens with three creation modes:
Choose how to create your Codex. Lumo recommends and drafts. You send every message.
Or start from a template
- 1Sandbox: Write the full instructions yourself. Best for teams who know exactly what they want.
- 2Co-create with Lumo: Answer guided questions; AI structures your answers into Codex instructions.
- 3Templates: Start from pre-built patterns (nurture, re-activation, champion expansion) and customize.
Creation modes
| Mode | How it works | Best for |
|---|---|---|
| Sandbox | You write the full instructions using the standard section structure (Situation, Objective, Prioritization, Cadence, etc.) | Teams who know exactly what they want; full control over wording |
| Co-create with Lumo | Answer questions one by one. Lumo structures your answers into Codex instructions. You can edit the result. | Quick setup; good starting point that you refine later |
| Template | Start from a pre-built template (e.g. Qualify & Book a Call, Product Testing Pilot). Customize to fit. | Common patterns like qualification, product trials, nurture, re-activation |
Codex card (after creation)
Once created, each Codex appears as a card on the Codex page. Link it to Lists so contacts on those lists receive recommendations shaped by that Codex.
Focus on enterprise expansion. Champion-led deals. Tone: consultative. Qualify on budget cycle...
- 1Codex name: Click to open and edit. Use the menu for duplicate, delete.
- 2AI context snippet: Preview of the strategic context the AI uses for recommendations.
- 3Linked lists: Contacts on these lists receive recommendations shaped by this Codex.
- 4Last updated: Review and iterate the Codex as your strategy evolves.
Linking Codex to a List
Open a List, go to its settings or details, and select a Codex from the dropdown. All contacts on that list will use that Codex's context when appearing in the Feed. A list can only have one Codex linked. See List Segmentation for list setup.
LinkedIn activity monitoring
Open a Codex and go to Settings → LinkedIn → Activity monitoring. That switch turns LinkedIn activity syncing on or off for that Codex. When it is on, the Lumenbase browser extension actively polls LinkedIn for new posts, articles, and shares from contacts on lists linked to this Codex: that membership is the monitored set, anchored in how the Codex is wired to lists (not a separate ad-hoc picker).
The feature is meant for focused cohorts: keep linked lists to a smaller number of contacts when you care about timely signals. The workspace shows how many contacts are monitored in aggregate across all Codexes with monitoring enabled (with a 200 contact guideline before polling quality may spread thin); use multiple Codexes or disable monitoring on lower-priority playbooks if you approach that ceiling.
Example Codex A vs B: Same Contact, Different Recommendations
The same contact can get very different recommendations depending on the Codex linked to their list. Here are two contrasting examples for a contact named Sarah Chen (enterprise deal in negotiation, 5 days since last contact).
Codex A: Aggressive Close
== SITUATION == Enterprise deals in late-stage negotiation. Champion identified, contract in review. == OBJECTIVE == Close the deal. Move to signature as fast as possible. == ENGAGEMENT POSTURE & STYLE == Direct and urgent. Push for next steps. Include clear CTAs and deadlines. == CONSTRAINTS == Do not suggest long nurturing sequences. Avoid soft check-ins.
Write email
Send a deadline-driven follow-up: "Can we get the signed contract by Friday? I can expedite onboarding if we close this week."
- 1Amber accent: Message draft available. Aggressive Codex suggests deadline-driven follow-up.
- 2Recommendation tone: Direct, urgent. "Can we get the signed contract by Friday?"
Codex B: Consultative Nurture
== SITUATION == Enterprise prospects with champions. Deals may have long decision cycles. == OBJECTIVE == Build trust and support the champion internally. Avoid pressure. == ENGAGEMENT POSTURE & STYLE == Consultative, peer-to-peer. Offer value (case studies, implementation support). No hard deadlines. == CONSTRAINTS == Never push for signature or create artificial urgency. Do not use aggressive CTAs.
Share a relevant case study or implementation one-pager. Ask if the champion needs any internal-selling support before their next stakeholder meeting.
- 1Blue accent: General action (no draft). Consultative Codex favors supporting the champion.
- 2Recommendation tone: Consultative, no pressure. Case study, one-pager, internal-selling support.
Same contact, same deal data. Codex A pushes for a close; Codex B focuses on supporting the champion. Choose the Codex that matches how you want to work that segment.
Where Codex Is Used
| Area | Codex role | Outcome |
|---|---|---|
| Feed | Strategic context for each contact on Codex-linked lists | Recommendations and message drafts aligned to the playbook |
| Tasks | Repeatable sequences and operating patterns | Faster, less variable follow-through |
| Team alignment | Standardizes language and intent across users | Less drift in quality and prioritization |
| LinkedIn Monitor (when enabled) | Activity monitoring in Codex settings polls LinkedIn for posts and shares from contacts on that Codex's lists | Prioritized social signals without monitoring your entire network |
Building Effective Codex Entries
What to include
- Target outcomes (what success looks like).
- Qualification and prioritization heuristics.
- Tone and communication constraints for outreach (via your preferred outreach platform).
- Common objection handling and escalation boundaries.
- Signals that should trigger immediate action.
What to avoid
- Vague goals without concrete action criteria.
- Conflicting instructions across multiple Codex entries.
- Outdated strategic assumptions left unreviewed.
Codex Workflow
- Create a Codex (Sandbox, Co-create, or Template).
- Define concise context and actionable guardrails.
- Link the Codex to Lists (or Lead columns) where it applies.
- Contacts on those lists appear in the Feed with shaped recommendations.
- Review recommendation quality and iterate the Codex wording as needed.
Quick Reference
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