How to use this guide
This guide teaches a system: Codex as your work hub + Granola as your meeting memory. The goal is to go from "asking ChatGPT things" to handing off real work — with context, files, apps, browser, skills, and automations.
The goal is not to know "everything about AI." The goal is for anyone to install one app, set up four things, and start handing off work: inbox, meetings, documents, research, data, finance, travel, forms, reports, slides, design, prototypes, follow-up, and repetitive tasks.
Three operating rules
Codex first
If something can be done with files, plugins, browser, computer use, skills, or automations, do it there. Granola captures meetings so Codex has that context too.
Reviewable output
Every important output should be reviewable: a table, doc, PDF, dashboard, draft, diff, screenshot, or list of actions.
Final click is human
For money, legal, external sends, publishing, sensitive data, or anything you cannot undo.
Model = the brain that responds, like GPT-5.5. Tool = the product you work in, like Codex. Plugin = a connection to an app, like Gmail, Granola, or Google Drive. Skill = a saved workflow you can reuse without explaining everything again. Automation = a scheduled Codex task that runs on a recurring basis, like checking Gmail every morning or checking your latest Granola notes and drafting a meeting document.
Setup: install Codex + Granola and watch the video
The promise: download Codex, add Granola to capture meetings, configure the right mode, and use that system for work, life admin, research, data, finance, design, and automation.
Minimum setup
- Install Codex desktop. Available on macOS and Windows. This is your work hub for Gmail, Slack, Drive, browser tasks, local files, plugins, skills, and automations. Computer Use is stronger on macOS for now.
- Install Granola. Granola covers what Codex cannot naturally see: meetings, calls, and spoken conversations. Use it to capture notes, decisions, and action items, then pass that context to Codex via the Granola plugin, MCP, Drive, or copy/paste.
- Use GPT-5.5 + low reasoning as your default. It is fast, cheap on tokens, and good enough for most daily tasks. Bump up to medium or high only if the work needs heavy reasoning or the first try comes back weak.
- Install the core plugins: Browser Use, Computer Use, Gmail, Google Calendar, Google Drive, Slack, Granola, Spreadsheets, Documents, and Presentations. Add Microsoft, Notion, GitHub, Linear, CRM, finance, or design plugins only if you actually use those systems.
- Set up real Codex permissions. Start in Read-only to explore. Use Auto when you trust the workspace. Avoid Full Access except for narrow, trusted tasks. Draft-only is not a button — it is a rule you give it in the prompt.
- Set up OS-wide dictation in Settings. Pick a hotkey, hold it down, speak, and Codex types wherever your cursor is. This changes how fast you can prompt.
- Turn on Memories in Settings if it applies. Chronicle is optional, more sensitive, and only for users who understand the privacy tradeoff.
Plugin shortlist: install only what you use
| Category | Plugins to know | Why it matters |
|---|---|---|
| Core setup | Browser Use, Computer Use, Gmail, Google Calendar, Google Drive, Slack, Granola, Spreadsheets, Documents, Presentations | The default everyday stack: email, calendar, files, meetings, docs, sheets, slides, browser tasks, and desktop control. |
| Microsoft users | Outlook Email, Outlook Calendar, Teams, SharePoint | Use these if your life is Microsoft instead of Google/Slack. |
| Notes + knowledge | Notion, Mem, Box, Readwise, SharePoint, Google Drive | Turn docs, notes, saved articles, and knowledge bases into useful context. |
| Meetings | Granola, Circleback, Fireflies, Otter.ai, Read AI, Teams | Meeting history becomes searchable context for follow-ups, decisions, and tasks. |
| Projects + tasks | Linear, GitHub, Atlassian Rovo, ClickUp, Monday.com, Teamwork | Turn notes and feedback into issues, tasks, status updates, and project summaries. |
| CRM + support | HubSpot, Salesforce, Pipedrive, Attio, Streak, Help Scout, Pylon, Dovetail, HighLevel | Useful for sales, support, customer notes, pipeline updates, and feedback synthesis. |
| Finance + research | Stripe, Brex, Morningstar, Dow Jones Factiva, Moody's, MT Newswires, Daloopa, Quartr, PitchBook, Third Bridge, CB Insights | Use when you need payments/business data, markets, filings, private-company research, or finance-grade context. |
| Marketing + analytics | Amplitude, Semrush, Brand24, Coupler.io, Windsor.ai, Omni Analytics | Useful for traffic, funnels, brand mentions, SEO, ad/reporting data, and dashboard questions. |
| Design + media | Canva, Figma, Cloudinary, Remotion, HyperFrames by HeyGen, Jam | Use for designs, prototypes, media assets, videos, and screen recordings with context. |
| Developer-only | Vercel, Netlify, Render, Cloudflare, Supabase, Neon Postgres, CircleCI, Sentry, CodeRabbit, Cursor | Install only if you are building or maintaining software. |
Do not install every plugin. Start with the core setup, then add one category when a real workflow needs it. A plugin is usually safer and more stable than Computer Use because Codex can talk to the app directly instead of clicking around.
When you do not know where to start, open Codex, paste the section of this guide you want to apply, and say: "Help me do this with my tools and my files. Ask me anything that is missing."
If the task lives on the web, try @Browser for web flows inside Codex. If a sign-in screen appears, you can try a low-risk manual login, but for existing sessions, cookies, extensions, or anything sensitive, use @Computer Use with Chrome. Computer Use uses your normal browser session, so you usually do not have to log in again. Always take over for passwords, payments, confirmations, and final submit.
Codex can read Gmail, Slack, Drive, files, and anything you paste in. But important decisions usually happen on calls. Granola turns those calls into notes and transcripts; Codex uses that context to create follow-ups, CRM notes, tickets, reports, proposals, briefs, and automations.
OpenAI ships GPT-5.5 on medium reasoning by default, but this guide recommends GPT-5.5 + low reasoning as your practical starting point. The rule: low for inbox, docs, research, tables, simple dashboards, and drafts; medium or high for serious due diligence, hard financial models, complex bugs, or decisions where being wrong is expensive.
Starter video
Watch this video as your first assignment. Do it after installing Codex and before the first lab.
Covers: file access, memory, plugins, skills, GPT Image, browser/computer use, automations, Chronicle. If the button does not open, search YouTube for "Learn 95% of Codex in 30 minutes Riley Brown".
Today: install Codex + Granola, pick GPT-5.5 + low reasoning, install Gmail/Drive/Slack/Browser/Computer Use, set up the dictation hotkey, connect or test the Granola → Codex flow, and watch the video. Do not move on without this.
Fundamentals + safety
AI vs Machine Learning vs Generative AI
- AI: the umbrella category. Systems that do things we usually associate with human intelligence.
- Machine Learning: AI that learns patterns from data — prediction, recommendations, fraud detection, classification.
- Generative AI: models that create or transform text, images, audio, code, documents, dashboards, and plans.
For this guide, the point is simple: Codex uses generative models and connected tools to do real digital work.
What Codex can do
Codex can help with almost any digital work that involves text, files, apps, data, or a browser: research, summarize, write, analyze, code, clean spreadsheets, create docs, build slides, use apps, open web pages, run QA, write scripts, and leave automations running.
What it should NOT do alone
- Transfer money, execute trades, pay bills, make purchases, or confirm bookings without approval.
- Send sensitive emails, external messages, public posts, or CRM updates without review.
- Sign contracts, treat legal or tax info as final truth, or make fiduciary decisions.
- Work with private data without clear permission.
Permissions: two separate layers
Keep these separate from day one: Codex real permissions are buttons and modes that control what it can technically do. The mental ladder is how you ask it to work so you do not hand off too much.
1. Codex real permissions
- Read-only: advisory mode. Codex can read, explain, and plan. If it needs to edit, run commands, use the network, or touch apps, it should ask permission or fail, depending on settings.
- Auto: the practical default. Codex can read, edit, and run things inside the workspace; it asks for approval to leave the sandbox, use the network, or do anything with side effects.
- Full Access: the powerful mode. It gives Codex much more freedom over your machine and network. Use it only for narrow, trusted, supervised tasks.
- Auto-review: not a permission. It is an automatic reviewer that evaluates some requests already needing approval and flags risk. It helps, but it does not replace your judgment.
2. The mental ladder for assigning work
- Read/plan only: "Read this and tell me what you would do."
- Draft only: "Create drafts, tables, or plans; do not send or publish anything."
- Reviewable edit: "Edit a copy, or show me a diff before applying."
- Approved execution: "Prepare the action, pause, and I will do the final click."
Read-only / Auto / Full Access are technical Codex settings. Draft-only, edit-with-approval, and execute-with-approval are instructions for the work itself. For beginners: use Codex in Read-only while exploring, Auto when the workspace is trusted, and keep your prompts in "draft only" mode until you trust the flow.
Computer Use has its own permissions
Computer Use also depends on system and app permissions: Screen Recording, Accessibility, the chosen browser or app, and a logged-in session. Use Always allow only on apps you would trust it to use automatically, and take over for passwords, payments, bookings, sends, or final submits.
Hallucinations
Hallucinations have not gone away. They are way down with newer models, files, web access, and cited sources, but they still happen. For finance, legal, medical, tax, contracts, or anything irreversible, ask for the source, page, cell, URL, or evidence before you act. If the answer might depend on current information, tell Codex to use Browser or web sources instead of relying on memory.
Simple setup: Read-only to learn and review; Auto for trusted workspaces; Full Access almost never at the start. In every mode, repeat this rule: "Do not send, pay, publish, delete, confirm, or edit sources of truth without my approval."
The 7 things Codex can do
Once you understand these 7 capabilities, you see why this whole guide can revolve around Codex.
Full file access
Codex can work with folders, PDFs, docs, spreadsheets, CSVs, images, decks, and scripts. Use it to turn messy files into reviewable reports.
Memories + Chronicle
Memories saves your preferences and workflows. Chronicle is optional and uses recent screen context to remember what you were working on. Pause it for sensitive content.
Plugins + MCP
Plugins connect Gmail, Drive, Slack, GitHub, Linear, and more. MCP lets you connect external or internal systems. If a plugin exists, prefer it over Computer Use.
Skills
A skill is a way to save "how I do this task." Finance, brand voice, weekly report, follow-up, deck, investing checklist — all of these can become skills. If something worked once, ask Codex to "use $skill-creator and turn this workflow into a skill."
GPT Image
Codex can generate and edit images inside the workflow: logos, ads, infographics, diagrams, UI mockups, product mockups, storyboards, slide visuals, icons, concept maps, and brand assets. Ask it to generate, review, iterate, and save the prompts it used.
Browser + Computer Use
Browser is the in-app web view in Codex for public pages, previews, and simple forms. Computer Use operates real apps — Chrome, Notes, legacy systems — when you need login, cookies, extensions, or an app without a plugin.
Automations
Schedule Codex to run recurring tasks: daily inbox, weekly summary, monthly report, pre-meeting research, feedback check, portfolio review.
Bonus — Subagents
For big tasks, ask for subagents: one researches, one verifies, one builds the table, one writes. Codex puts it all together into a single deliverable.
Browser vs Computer Use
- Plugin: best for Gmail, Drive, Slack, Sheets, and connected systems. More stable and safer.
- In-app Browser: best for previews, HTML dashboards, pages without login, visual QA, and web flows inside Codex.
- Computer Use: best for regular apps, Chrome with an active session, Notes, internal systems, software without a plugin, or multi-app tasks.
The most important hack: when in doubt, open Browser
Here is the beginner shortcut: if you do not know how to do something on a website, ask Codex to open the page, look at the flow, and walk you through it. It can navigate, read instructions, fill in simple fields, prepare drafts, and tell you when you need to take over.
Example: "I want to file my LLC annual report." Codex can open the site, read through the steps, prepare the info, and fill in everything safe. You take over for login, password, payment, and final submit.
"@Browser open [URL] and help me complete this flow. If it requires login or my real session, switch to @Computer Use with Chrome. Pause for credentials, payments, confirmations, or final submit. At the end, summarize exactly what you did and what is still pending."
Another hack: paste a section of this guide
This guide also works as a prompt. Copy any section — finance, data, design, travel, career, or life admin — and paste it into Codex with your files: "Help me apply this to my case."
"Before you act, tell me which tool you are going to use: plugin, Browser, or Computer Use. Prefer plugin if one exists. If you are going to use Computer Use, ask me for approval before any irreversible action."
How to ask it well: context, format, verification
Do not think "prompt engineering." Think "context engineering" — give Codex everything a good human assistant would need to do the job well.
The simple framework
What I want to know → how I ask → what I get back → how I read it → what I decide.
- Goal: what to achieve, in one sentence.
- Context: audience, situation, files, pending decisions.
- Tools: which plugins or apps it can use.
- Constraints: what not to touch, what not to send, what not to make up.
- Format: table, bullets, Word, PDF, deck, dashboard, JSON, checklist.
- Verification: how to prove it is right — source, page, cell, screenshot, link.
- Iteration: correct the output and turn the good workflow into a skill.
Have Codex interview you first
"Before you start the task, interview me. Ask me the 5–10 questions you need to have enough context. Then execute with a clear plan."
How to create a skill with $skill-creator
A skill is how you stop repeating the same prompt forever. Use it when a workflow has already worked: financial analysis, meeting follow-up, brand voice, data cleanup, weekly deck, or investing checklist.
- Stay in the thread where the workflow went well, or paste a solid example.
- Tell it what to remember: rules, format, tone, sources, commands, files, or examples.
- Ask Codex to use $skill-creator.
- Test the skill on a new task and fix it if it fails.
"Use $skill-creator to turn this workflow into a skill. Use this thread as a good example. The skill should trigger when I ask for [type of task], follow these rules [rules], and return this format [format]. Before creating it, ask me questions if anything is missing."
How to correct a bad response
Do not just say "this is wrong." Say exactly what failed: a data point, the tone, the format, the source, a judgment call, or an action. Then ask it to update the skill or memory if that error could happen again.
"Fix this: you assumed [X], but the correct source is [Y]. Run the analysis again. Add this rule to the skill so the error does not happen again."
How to turn responses into decisions
Always ask for a final artifact: a decision table, pros/cons, scenarios, next actions, owner, deadline, and risk. If it is not actionable, it is not done.
Create your first personal skill with $skill-creator: "Reply in bullets, with a table when comparing options, and close with next action + risk + what to verify." Then ask Codex to use that skill on a real task.
Personal productivity: email, meetings, messages
This is the first place Codex changes your daily life. No theory — inbox, meetings, follow-up, and tasks hidden inside messages.
Inbox management with Gmail
Codex can use Gmail to find emails that matter, pull context from Drive/Slack, and write drafts in your voice. Set it to draft-only at the start.
"Use @gmail to review my inbox today. Find emails that need a reply. Use @google-drive [tone doc] and @slack if context is missing. Give me back: priority, why it matters, draft reply, and a question if info is missing. Do not send anything."
Messages → finished tasks
With Computer Use, Codex can review a specific conversation, understand the request, use the relevant apps, and leave a draft reply. Pause before booking, buying, or confirming anything.
"@Computer Use look at my messages from [person]. Figure out the request, do the work in the necessary apps, and leave a draft reply. Pause before any irreversible action."
Meetings → outputs
- Granola or Gemini Notes captures the meeting.
- Granola becomes the spoken input for the system: calls, video calls, decisions, action items, and context that does not live in Gmail/Slack/Drive.
- Codex reads the note or transcript via Granola MCP, Drive, file, or copy/paste.
- Codex creates a follow-up email, CRM note, Slack summary, Linear/Jira tasks, and a Drive doc.
- You approve anything that goes external.
"Read this Granola note. Turn the meeting into: 1) decisions made, 2) action items with owner/deadline, 3) draft follow-up email, 4) tasks for Linear/Jira/CRM, 5) open questions. Do not send or update anything without my approval."
OS-wide dictation
Use dictation to speak long prompts. It is great for explaining context, drafting emails, summarizing meetings, or dictating instructions while you look at a sheet or doc.
Knowledge base / second brain
If you use Notion, Mem, Readwise, Box, SharePoint, or Drive, connect it as context. Codex can search your saved notes, docs, articles, and meeting history before drafting a plan or answer.
Automations that actually help
- Inbox check: every morning, find emails that need a reply and draft them.
- Meeting follow-up: after Granola notes land, draft action items, follow-up email, and a summary doc.
- Pre-meeting brief: 30 minutes before a calendar event, pull context from Gmail, Drive, Slack, and Granola.
Set up two automations: "inbox at 7am" and "brief 30 minutes before each meeting." Let them run for a week, then fix the skill based on what fails.
Finance and investing with Codex
Codex does not replace financial judgment. It replaces a lot of manual work: reading, comparing, extracting, modeling, summarizing, citing, turning things into reports, and running routines.
Why this matters in finance now
Finance is PDFs, Excel, filings, news, ratios, notes, scenarios, and reports. Codex lowers the cost of reading more sources and turning them into reviewable decisions.
Reading financial statements
- Upload a 10-K, 10-Q, earnings call, Excel model, or folder of reports.
- Ask for an inventory first: which files it read, what periods they cover, which columns or pages matter.
- Then ask for findings with evidence: revenue drivers, margin pressure, debt, cash flow, risks.
- Final output: memo, table, dashboard, deck, or PDF.
"Read these financial statements. Inventory sources and pages first. Then pull 5 insights, 3 risks, 3 questions for management, and a table with evidence by page/cell. Do not make up missing data."
Comparing companies
Ask for the comparison as a system, not an opinion: business model, growth, margins, debt, cash flow, valuation, risks, catalysts, and sources.
"Compare [A] vs [B] vs [C]. Use filings and current sources. Table: growth, margin, leverage, FCF, capex, multiples, risks. End with bull/base/bear case and what data would change the conclusion."
Analyzing stocks, news, and trends
- Use web, plugin, or current source. Without current data, it is useless for investing.
- Ask for a bull thesis, bear thesis, assumptions, risks, catalysts, and "what would have to happen for me to be wrong."
- Automate weekly summaries by sector or portfolio.
Financial planning and products
Codex is great for scenarios, budgets, savings, investing, cash flow, and explaining products. If you need live banking data, use a connected tool like Perplexity/Plaid or export the data and have Codex read it.
"Explain [financial product] in plain language. Give me a numeric example, costs, specific risks, when it is NOT a good fit, and comparable alternatives."
"Should I invest in X?"
Do not ask that on its own. The right question includes time horizon, risk tolerance, liquidity, current portfolio, alternatives, and decision criteria.
"I want to evaluate investing in [X]. Before answering, ask me the questions you need about horizon, risk, liquidity, portfolio, and goal. Then compare X against alternatives and give me bull/base/bear case."
Codex can be an analyst, tutor, and organizer. It is not a fiduciary. Do not hand off order execution, transfers, payments, or big decisions without human verification.
Data, spreadsheets, dashboards, and reports
Codex can take you from "ugly file" to "reliable analysis + visualization + report" if you ask for the right workflow.
Clean data without touching the original
Great for CSVs/Excels with mixed date formats, currency symbols, duplicates, summary rows, aliases, or missing values.
"Clean @file.csv. Keep the original intact. Write a clean copy. Normalize dates, currencies, duplicates, and aliases. Also give me a quality note with rows changed, removed, or questionable."
Analyze exports and Google Sheets
Codex can inspect columns, run calculations, create charts, save HTML visualizations, and open previews in the in-app browser. You do not need to know Python: Codex can run the code needed to generate graphs, tables, and reports, then show you the finished artifact.
"Analyze @sales-export.csv. Question: which segment changed the most this quarter? Inspect the columns first, answer from the data, create an HTML visualization, and open it in Browser to review."
Ship reports
$spreadsheet: CSV, TSV, Excel, Google Sheets.$jupyter-notebook: reproducible analysis and walkthroughs.$doc: Word reports with tables and layout.$pdf: final render and review before sharing.$slides: editable deck with charts, text, and visuals.
Executive dashboards
For simple dashboards: Codex generates local HTML, opens it in Browser, and tunes it. For recurring dashboards: automation + data source + skill + weekly or monthly output.
Upload a real CSV or Excel. Ask for: clean copy, 3 insights, 1 chart, and a 1-page executive memo. Save it as a skill if it repeats.
Automation for work, teams, and personal life
Codex can automate a lot, but you have to map the process first. Do not automate chaos — turn a repetitive task into a clear, reviewable, safe flow.
The mapping template
- Trigger: the thing that starts the workflow — a time of day, new email, completed meeting, new row, new message, invoice, deadline, or file upload.
- Input: files, app, thread, spreadsheet, dashboard, form, screenshot, or transcript.
- Source of truth: where the truth lives.
- AI task: read, classify, summarize, write, calculate, create an artifact, or prepare an action.
- Approval: which part needs a human.
- Output: draft, doc, sheet, ticket, Slack, PDF, deck, dashboard, checklist, or email.
- Owner: who owns the process.
- Failure mode: what can go wrong and how you spot it.
The fastest flows to implement
- Meeting → outputs: transcript → summary → follow-up → tasks → Drive doc.
- Inbox → drafts: priority emails → context → reply in your voice.
- Recurring report: Sheets/dashboard → executive summary → email/Slack/Drive.
- Feedback synthesis: Slack + GitHub + Linear + Drive → themes + evidence + next steps.
- Life admin: renewal, form, paperwork, state filing, booking, or cancellation → Browser/Computer Use + human review.
- Learning loop: article/course/paper → summary → glossary → study plan → flashcards or doc.
Pick one repetitive task from this week. Map it with the template. Implement only the first 20% that saves the most time. Then turn the flow into a skill.
Design, branding, slides, and content
Codex is not just code. With image generation + slides skill + brand files, it can create and edit visual deliverables.
Image generation inside Codex
You do not have to leave for another app to get started. In Codex you can ask for images as part of the same job: read the brief, generate visuals, review variations, drop them into slides/docs, and save the prompt as a skill if it repeats.
- Infographics: explaining processes, timelines, financial concepts, trips, projects, or workflows.
- UI mockups: app screens, dashboards, landing pages, and product concepts.
- Ads and content: posts, banners, campaigns, thumbnails, storyboards, and newsletter visuals.
- Product mockups: packaging, merch, labels, billboards, e-commerce.
- Slides: cover images, diagrams, per-slide visuals, and conceptual graphics with $slides + $imagegen.
- Diagrams: processes, architecture, concept maps, frameworks, and educational visuals.
"Use image generation in Codex. I want [type of visual] for [audience]. Goal: [what it should communicate]. Style: [brand/vibe]. Exact text if any: "[text]". Give me 4 variants, explain which is best, and save the winning prompt to reuse."
Logos and branding
Use Codex/GPT Image to generate first directions. Then refine in Canva/Figma if you need final assets. Ask for variants, not a single logo.
"Generate 6 logo directions for [brand]. Personality: [3 words]. Must be simple, non-infringing, legible small, no watermark. Then make me a table: option, vibe, when to use it, risk."
Slides and decks
With $slides + $imagegen, Codex can edit PowerPoints, keep text as text, keep native charts when it makes sense, generate visuals, and check overflow/font issues before handing it off.
"Use $slides and $imagegen. Edit this deck: keep branding, add 3 slides, preserve editable text, generate consistent visuals, render the deck to images, check for overflow/font issues, and give me a final copy."
Content
Codex can turn transcripts, feedback, and documents into posts, newsletters, scripts, briefs, and one-pagers. The key is to create a voice skill with real examples.
Infographics, UIs, diagrams, and mockups
When the visual is part of a bigger deliverable, do it inside Codex: it generates the image, drops it into the deck/doc/dashboard, reviews the layout, and saves the prompt. For small or dense text inside images, ask for a review, variations, and a no-text version as backup.
Create a brand skill: voice, colors, tone, good/bad examples. Then ask for one post + one slide + one image with the same visual voice.
Apps, websites, and browser tasks
Codex can build, test, preview, and polish simple digital tools. For non-technical users, the right approach is prototype first, then decide whether it is worth making real.
Build apps and websites
- Simple idea: ask Codex for a spec and a local HTML mockup.
- Frontend/UI: Codex can generate, open in Browser, review visually, and improve.
- QA: Computer Use can click through real flows and deliver a bug report with repro steps.
"Build a local prototype of [idea]. First ask me what you need. Then create HTML/CSS/JS, open it in Browser, review the UI, fix issues, and leave a summary of what is still needed for production."
Doing tasks on websites
A lot of tasks do not need a new app — just open a website and complete a flow. Use @Browser for pages Codex can open inside the app, and @Computer Use with Chrome when you need your existing login session, cookies, extensions, or real browser profile.
"I want to complete [web task: e.g., LLC annual report]. Open the right site, read the instructions, prepare the fields and document list. If it requires login, password, payment, or final submit, pause and let me take over. Do not submit anything without approval."
QA with Computer Use
"@Computer Use test my app on [staging/local]. Flows: signup, invite teammate, billing. For each bug: repro steps, expected, actual, severity. Keep going even if there are non-blocking issues."
A personal life-admin system
The first big use of Codex does not have to be "build an app." It is getting small, draining tasks out of your head: forms, renewals, bookings, comparison shopping, paperwork, travel, and follow-up.
General workflows
- Paperwork and forms: Codex opens the site, reads the requirements, builds a checklist, prepares the fields, and pauses for login, payment, or final submit.
- Travel: researches options, compares flights/hotels, builds an itinerary, creates a packing list, and leaves bookings as drafts.
- Big purchases: compares products, reviews, specs, prices, and tradeoffs; delivers a decision table.
- Subscriptions and accounts: inventory of services, upcoming renewals, cancellations to review, better plans.
- Home and maintenance: recurring tasks, vendors, budgets, reminders, and seasonal checklists.
- Non-medical health/fitness: organize habits, workouts, meals, calendar, and tracking. Anything medical (diagnosis or treatment) always goes to a professional.
More normal-person use cases
- Document cleanup: organize downloads, rename files, summarize PDFs, and create a folder system.
- Event planning: compare venues, draft invites, make a budget, create a schedule, and prepare reminders.
- Meal planning: plan meals, grocery lists, pantry cleanup, and prep schedules. Do not use it for medical diet advice.
- Gift planning: compare options, build a gift list, draft messages, and track dates.
- Personal knowledge base: turn saved notes, articles, books, and meeting notes into a searchable second brain.
The safe pattern
- Codex researches and builds the plan.
- Codex prepares the form, email, table, or checklist.
- You review the sensitive details.
- You handle login, payment, or final submit.
- Codex summarizes what was done and creates a reminder if needed.
"@Browser help me with [task]. Read the requirements, build a checklist, prepare the info, and tell me what is missing. If it requires login, sensitive data, payment, or final submit, pause and let me take over. At the end, save a summary and a reminder."
Pick a real task you have been putting off: a renewal, a form, a purchase comparison, or planning a trip. Have Codex prep it for your review.
Learning, career, and projects
Codex also works as a learning and career system: read dense material, turn it into notes, prep for interviews, improve resumes, organize projects, and create deliverables you can show.
Learning something hard
- Upload a paper, course, book, PDF, or link.
- Ask for a summary, glossary, concept map, evidence table, and open questions.
- Ask it to create a 7-day study plan and a mini-quiz.
- If the topic is visual, ask for an infographic or diagram with image generation.
"I want to learn [topic] from this material. Create a Markdown report with executive summary, glossary, step-by-step explanation, diagram, evidence by section/page, caveats, open questions, and a 7-day study plan."
Career and job search
- Resume/LinkedIn: turn experience into strong bullets and tailor them to a job description.
- Interviews: company research, likely questions, STAR answers, and simulation.
- Networking: drafts of personalized messages, follow-ups, and a tracker.
- Portfolio: turn old projects into case studies, one-pagers, or mini-sites.
Personal projects
- Turn an idea into a brief, milestone plan, task list, and first prototype.
- Use Granola to capture brainstorms or calls.
- Use Codex to create docs, decks, dashboards, scripts, sites, and visual assets.
- Save the workflow as a skill if the project repeats.
"Take my resume/LinkedIn and this job description. Identify gaps, rewrite relevant bullets, prep 10 interview questions, 5 STAR stories, and a 3-day prep plan. Do not invent experience."
Pick a topic you want to learn, or a job opportunity/project. Have Codex turn it into an artifact: report, plan, deck, portfolio page, or checklist.
Map of common tasks → Codex
Use this table as a quick index: task → how to do it in Codex → first prompt.
| Task | How to do it in Codex | First prompt |
|---|---|---|
| Understand AI | Codex creates a short report with examples, quiz, and glossary. | "Explain AI vs ML vs GenAI in 5 bullets and give me 3 everyday examples." |
| Limits and biases | Verification skill + approval ladder + sources. | "Before answering, list error/bias risks and how to verify." |
| Personal inbox | Gmail + Drive/Slack for context + drafts without sending. | "Review my inbox today and prepare drafts. Do not send." |
| Meetings | Granola → Codex → decisions, tasks, follow-up, and docs. | "Read this Granola note and turn it into follow-up + action items." |
| Messages with tasks | Computer Use reads the thread and completes the follow-through. | "@Computer Use look at this message and prepare the draft/booking/checklist." |
| Paperwork/forms | Browser/Computer Use navigates, reads requirements, prepares fields. | "@Browser open this site and help me complete the flow. Pause before submit." |
| Travel | Research, comparison, itinerary, packing list, and bookings as drafts. | "Plan this trip with options, pros/cons, budget, and itinerary." |
| Big purchases | Web research + decision table + risks. | "Compare these options with price, reviews, specs, tradeoffs, and a recommendation." |
| Learn a topic | Subagents + Markdown report + diagrams + study plan. | "Turn this material into a study guide, glossary, diagram, and quiz." |
| Resume/job search | Resume + job description → bullets, gaps, STAR stories, and prep. | "Tailor my resume to this role without inventing experience." |
| Read financial statements | PDF/Excel/folder + $spreadsheet/$doc/$pdf. | "Pull insights with evidence by page/cell." |
| Compare companies | Web/sources + table + bull/base/bear. | "Compare A/B/C with sources and a conditional conclusion." |
| Analyze stocks | Current research + filings + thesis map + risks. | "Give me a bull/bear thesis and what data would invalidate each." |
| Summarize news/trends | Weekly automation by topic, sector, or portfolio. | "Every Monday, summarize news on [topic] with practical impact." |
| Financial planning | Codex analyzes bank export/Excel or a secondary tool with Plaid. | "Build savings/investing scenarios with my exported data." |
| Explain financial products | Tutor + numeric example + risks + when not to use. | "Explain this product to me as a beginner, with example and risks." |
| Data: Excel, CSV, PDFs | $spreadsheet + Google Sheets + clean copy + QA note. | "Clean copy, preserve original, report changes." |
| Dashboards | Local HTML + Browser preview + recurring automation. | "Create an HTML dashboard from this data and open it to review." |
| Recurring reports | Scheduled automation + doc/sheet/Slack/email output. | "Every Friday create an executive report and follow-up drafts." |
| Logos and branding | GPT Image + brand skill + optional Canva/Figma. | "Generate 6 visual directions and a decision table." |
| Content | Transcripts/docs → posts, newsletter, scripts, briefs. | "Turn these notes into 5 posts and 1 newsletter in my voice." |
| Apps, websites, artifacts | Codex creates a prototype, opens Browser, QAs with Computer Use. | "Build a local prototype, open it, test it, and fix it." |
| Browser tasks | Codex opens the site, reads the instructions, prepares the fields, and pauses for sensitive steps. | "@Browser help me complete this web flow; pause before login, payment, or submit." |
Secondary tools: when to leave Codex
Codex is the center. These tools come in when they are clearly better for a specific task.
| Tool | Use it when… | Do not use it when… |
|---|---|---|
| ChatGPT.com | Quick question, explanation, brainstorm, simple deep research. | The task needs local files, automation, or using apps. |
| ChatGPT for Excel/Sheets | You want AI inside the sheet, with formulas/cells/direct editing. | Codex can already analyze an export and you do not need to live-edit the workbook. |
| Claude Cowork | Heavy local files, Live Artifacts, high-quality Excel/PPT/Word. | You already solved the flow with Codex + skill. |
| Perplexity | Quick web research with citations; personal finance with Plaid if it applies. | You need automation inside your apps or local files. |
| Julius | Big datasets, financial datasets, statistical/data-heavy analysis. | Your data is a normal CSV/Excel that Codex can clean and analyze. |
| Granola / Gemini Notes | Capturing meetings. Codex then processes the outputs. | You have no meetings, or a perfect transcript already exists. |
| Claude Design / Canva / Figma | Final visual polish, design collaboration, brand system. | You only need concepts or initial mockups in Codex. |
| Lovable / v0 / Replit / Bolt | You want a fast web MVP or a handoff to devs. | The solution is a simple dashboard or automation in Codex. |
| Zapier / Make / n8n | Simple A → B data flow without much reasoning. | You need to read context, decide, write, or verify. |
| Cursor | You are building software and want an agentic IDE with codebase context, multi-file edits, terminal/tool use, and local/cloud agents. | You are doing general life/work automation; use Codex desktop instead. |
| OpenClaw | Technical user who wants open-source/local. | This guide is beginner-plus. Skip it. |
30-day plan: Codex-first
Every week produces a real deliverable. By the end, you have a working system, not just knowledge.
Setup + first personal workflow
Deliverable: Codex + Granola set up + inbox draft automation + first meeting processed + dictation working.
- Install Codex, Granola, and core plugins.
- Add one optional plugin category you already use: Microsoft, Notion/knowledge, CRM, finance, design, or project management.
- Watch the video "Learn 95% of Codex".
- GPT-5.5 + low reasoning as default.
- Set up approvals and OS-wide dictation.
- Create an automation: daily inbox with drafts.
- Take one meeting with Granola and ask Codex to create follow-up, action items, and a summary doc.
Data + finance
Deliverable: one finance/data report with sources, table, and chart.
- Upload a real CSV/Excel and clean a copy.
- Upload a real financial PDF or report.
- Ask for 5 insights + 3 risks + evidence.
- Turn it into a doc/PDF/deck.
- Create a skill if the analysis repeats.
Work/life automation
Deliverable: one personal or work process mapped + automation or skill running.
- Map trigger/input/source/approval/output.
- Implement with a plugin if one exists.
- Use Computer Use only if there is no plugin or official integration.
- Run it 3 times and fix it.
- Prep a simple demo with before/after and real data.
Visual + app/prototype + final demo
Deliverable: one visual piece, one deck or prototype, and one final demo to share.
- Create a logo/ad/infographic/deck with Codex.
- Create a local prototype or simple website.
- QA with Browser/Computer Use.
- Present "before/after" to a friend, colleague, or small audience.
Prompt bank: copy & paste
Starter prompts so this guide is usable from day 1.
"Review my Codex setup. Recommend plugins, permissions, memories, dictation, and starter skills for my work: [describe role]."
"Based on my work tools — [list apps] — tell me which Codex plugins to install, which to skip, and the first workflow to test for each installed plugin."
"Before executing, interview me. Ask the minimum questions you need. Then give me back a plan + output."
"Use @gmail. Triage today: urgent, important, can wait. Drafts in my voice. Do not send."
"Read this transcript. Pull decisions, owners, deadlines, follow-up email, CRM note, and tasks."
"Analyze this report. Inventory the sources first. Then 5 insights, 3 risks, table with evidence by page/cell."
"Evaluate [X] with bull/base/bear case. Ask me for personal data first if needed. Do not give a final recommendation without stating assumptions."
"Clean @file. Keep original. Write a clean copy + quality note with changes and questionable rows."
"Create an HTML dashboard from this data. Open it in Browser, review visually, fix the layout, and save the final artifact."
"Map this process with trigger/input/source/AI task/approval/output/owner/failure mode. Propose the first safe automation."
"I am going to paste a section from my guide. Help me apply it to my real case. First ask me what tools, files, or permissions you need."
"@Browser open [URL] and walk me through this flow. If it needs an existing login session, cookies, extensions, or my normal browser profile, switch to @Computer Use with Chrome. Pause before credentials, payment, or final submit."
"Use Browser or current web sources for this. Do not rely only on memory. Cite the source, page, URL, cell, or screenshot that supports the answer."
"Use image generation to create [infographic/UI/mockup/ad/diagram]. Give me 4 variants, a recommendation, and save the winning prompt to reuse."
"Use $skill-creator to turn this successful workflow into a skill. Use this thread as a good example. Include rules, format, allowed sources, and when to ask for approval."
"Use $slides + $imagegen. Create an editable deck, keep text/native charts, render and fix overflow before handing it off."
"@Computer Use complete this task in [app]. Explain what you are going to touch. Pause before sending, publishing, buying, or confirming."
"@Browser help me with [paperwork/form]. Read requirements, prepare a checklist, fill in the safe parts, and pause before login, payment, or submit."
"Plan [trip]. Compare options, budget, risks, itinerary, bookings as drafts, and packing list. Do not buy anything."
"Turn this material into a learning report: summary, glossary, diagram, examples, caveats, quiz, and 7-day plan."
"Tailor my resume/LinkedIn to this role. Do not invent experience. Give me bullets, gaps, STAR stories, and an interview plan."
Main sources to keep this guide up to date
One app. A lot of leverage.
This guide is not about memorizing 20 tools. It is about using Codex as your work hub: read, analyze, create, use apps, automate, and leave reviewable deliverables.
When something repeats, do not do it the same way again. Turn the workflow into a skill or automation.
This guide is educational and practical, not professional legal, financial, medical, tax, security, or technical advice. Use AI tools at your own risk. You are responsible for what you connect, approve, send, publish, delete, pay, file, or run on your computer. Keep approvals on for sensitive actions and verify important outputs before acting.