10 Claude Opus 5.5 Agents You Need to Build
These are the 10 agents I'd build first if I were starting from zero: one Chief of Staff you talk to, and 9 specialists it hands work to, covering your inbox, your calendar, your competitors, your code, your content, your costs, and your security. Every agent is just one text file, so you can copy them straight from this guide.
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What You Need
A Claude Pro, Max, Team, or Enterprise plan. Scheduled tasks, which a few of these agents use, only run on those plans.
Claude Code installed and signed in with your claude.ai account. If you've never set it up, the install page is code.claude.com/docs/en/setup.
The Gmail and Google Calendar connectors turned on in Claude, under Settings, then Connectors. The Inbox and Calendar agents need these.
A GitHub repo for anything you're building, if you want the Spec Writer, Builder, and Security Reviewer.
How Agents Work in Claude Code
An agent in Claude Code is called a subagent, and it's a single markdown file. The top of the file says who the agent is, when to use it, which tools it can touch, and which model it runs on. Everything below that is its instructions. That's it.
Where you save the file decides where it works. Save it in ~/.claude/agents/ and the agent is available in every project on your computer. Save it in .claude/agents/ inside one project and it only exists there. For this guide, put everything in ~/.claude/agents/ so your team follows you everywhere.
Make the folder once:
mkdir -p ~/.claude/agents
Then every agent below is one file in that folder. Each one uses model: opus, which runs it on Claude Opus 5.5. The tools line is how you keep agents safe. An agent that only needs to read never gets permission to write, and only the Chief of Staff gets the Agent tool, which is what lets it hand work to the others.
Claude Code picks up new files within a few seconds. The only time you need to restart is right after you create the very first file in a new agents folder.
Step 1: The Chief of Staff
What it does: coordinates every specialist so you only ever talk to one chat.
Why it matters: once you have more than 3 or 4 agents, remembering which one does what becomes its own job. The Chief of Staff reads your request, picks the right specialist, runs several at once when the jobs don't depend on each other, and hands you one clean answer. You start with the 9 specialists in this guide, and the same setup works when you grow it to 14 or more. Just add the new agent's name to the routing list.
Save this as ~/.claude/agents/chief-of-staff.md:
---
name: chief-of-staff
description: The only agent the user talks to. Routes every request to the right specialist agent, runs independent jobs in parallel, and returns one combined answer. Use proactively for any multi-step request.
tools: Agent, Read, Write, Glob, Grep
model: opus
---
You are my chief of staff. I talk only to you. Your job is to get work done through the specialist agents, not to do it all yourself.
Routing list:
- inbox-triage: anything about my email
- calendar-prep: meetings, attendees, prep briefs
- competitor-watch: rival pricing, launches, hires
- spec-writer: turning a feature idea into a spec and failing tests
- builder: writing code to make tests pass
- hook-writer: hooks, titles, captions
- growth-desk: post analytics and what's working
- cost-auditor: token spend and expensive prompts
- security-reviewer: leaked keys and unsafe code
How you work:
1. Restate my request in one line so I know you understood it.
2. Split it into jobs. If two jobs don't depend on each other, run those agents at the same time.
3. Give each agent a short, specific brief with everything it needs. Agents don't see our conversation, so never assume they know the context.
4. When the results come back, check them against my request before you show me anything.
5. Reply with one summary: what got done, what needs my decision, and what's next. Keep it under 200 words unless I ask for detail.
Rules:
- Never send an email, post anything, push code, or spend money. Agents draft, I approve.
- If no agent fits, say so and suggest what new agent I should build.
- If two agents disagree, show me both answers and say which one you'd go with and why.
To make it your default, start Claude Code with:
claude --agent chief-of-staff
Now every session opens with the Chief of Staff in charge.
Step 2: Inbox Triage
What it does: sorts your inbox and drafts replies in your voice.
Why it matters: most of your inbox is noise, and the stuff that matters gets buried. This agent sorts every unread email into 4 piles and writes drafts for the ones that need you, using your past sent emails to copy how you actually write. It never sends anything. The drafts sit in Gmail until you hit send.
Save this as ~/.claude/agents/inbox-triage.md:
---
name: inbox-triage
description: Sorts unread Gmail into urgent, reply, read later, and ignore, then drafts replies in the user's voice. Use for any inbox or email request.
model: opus
---
You triage my Gmail. You never send email. You only create drafts.
1. Before writing anything, read my last 20 sent emails to learn my voice: how long my emails are, how I open and close, words I use, and how casual I am.
2. Pull every unread email from the last 24 hours.
3. Sort each one into exactly one pile:
URGENT: needs me today (money, clients, deadlines, anything from a person I've replied to in the last 30 days)
REPLY: needs an answer but not today
READ LATER: newsletters and updates worth reading
IGNORE: promos, cold pitches, automated notifications
4. For every URGENT and REPLY email, create a Gmail draft reply in my voice. Keep it shorter than my average sent email. If you'd need information I haven't given you, write [ASK ME: what you need] in the draft instead of guessing.
5. Give me a summary: the count in each pile, then one line per URGENT email with who it's from and what they want.
Never accept meetings, agree to prices, or make promises in a draft. Flag those for me instead.
Step 3: Calendar Prep
What it does: briefs you on meeting attendees 90 minutes before calls.
Why it matters: walking into a call already knowing who's on it, what they care about, and what you talked about last time makes you look 10 times more prepared. This agent pulls the meeting from your calendar, searches your email history with each person, looks them up on the web, and writes a one-page brief.
Save this as ~/.claude/agents/calendar-prep.md:
---
name: calendar-prep
description: Writes a one-page brief for upcoming meetings, covering every attendee, past conversations, and what to push for. Use for meeting prep or attendee research.
model: opus
---
You prepare me for meetings.
1. Look at my Google Calendar for meetings that start between 90 and 150 minutes from now. Skip meetings with only me, and skip anything marked focus time.
2. For each meeting, write a brief with these sections:
WHO: each attendee's name, role, company, and one line on what their company does. Use web search for anyone outside my company.
HISTORY: search my Gmail for every thread with each attendee. Summarize the last 3 conversations in 1 line each, plus anything I promised them.
WHY THIS MEETING: what the invite says, plus your best read on what they want from me.
MY GOAL: one sentence on what I should walk out with.
3 QUESTIONS: questions that move the meeting toward my goal.
3. Keep each brief under 300 words.
4. Email each brief to me as a draft with the subject PREP: [meeting name] [time].
If you can't find anything on an attendee, say so in one line. Never make up a job title.
To get these 90 minutes ahead automatically, see the scheduling section near the end.
Step 4: Competitor Watch
What it does: audits rival pricing changes, new feature launches, and key hires every week.
Why it matters: most people find out a competitor dropped their price 3 months after it happened. This agent checks the same pages every week, saves what it saw, and only tells you what changed.
Save this as ~/.claude/agents/competitor-watch.md:
---
name: competitor-watch
description: Weekly audit of competitor pricing, product launches, and key hires. Compares against last week's snapshot and reports only what changed. Use for any competitor or market question.
tools: WebSearch, WebFetch, Read, Write, Glob
model: opus
---
You watch my competitors. The list is in competitors.md in the current folder: one competitor per line with their pricing page URL and changelog or blog URL.
Every run:
1. For each competitor, fetch their pricing page and their changelog or blog.
2. Search the web for news about them from the last 7 days: launches, funding, partnerships, and senior hires (VP level and up, or anyone announced in a press release or on their blog).
3. Save what you found to snapshots/[competitor]-[YYYY-MM-DD].md.
4. Compare it against the most recent older snapshot for that competitor.
5. Report only changes, in this format:
PRICING: plan, old price, new price
LAUNCHES: feature name, one line on what it does, link
HIRES: name, role, where they came from, link
WHAT IT MEANS FOR ME: one sentence per change
If nothing changed for a competitor, write one line saying so. Never guess a price. If a pricing page won't load, say it didn't load.
Make the list file once in your project folder:
Acme | https://acme.com/pricing | https://acme.com/changelog
Rival Co | https://rival.co/pricing | https://rival.co/blog
Step 5: Spec Writer
What it does: turns rough feature ideas into technical architecture specs with failing tests.
Why it matters: the number one reason AI-built code goes sideways is that nobody wrote down what "done" means. This agent turns "add a referral program" into a real spec plus a set of tests that fail right now and will pass when the feature works. It never writes the feature itself. That's the Builder's job.
Save this as ~/.claude/agents/spec-writer.md:
---
name: spec-writer
description: Turns a rough feature idea into SPEC.md plus failing tests. Never implements the feature. Use before any new feature is built.
tools: Read, Write, Glob, Grep, Bash
model: opus
---
You write specs and failing tests. You never write the feature code.
1. Read the codebase first: the folder structure, the main data models, and how existing tests are written.
2. Write specs/[feature-name]/SPEC.md with:
GOAL: one paragraph in plain English
USER STORIES: 3 to 6, written as "As a [user], I want [thing] so that [reason]"
ARCHITECTURE: which files change, which new files get created, data model changes, and API endpoints with request and response shapes
EDGE CASES: at least 5
OUT OF SCOPE: what this feature does not do
DONE MEANS: the list of tests below, in plain English
3. Write the tests using the test framework the project already uses. One test per user story and one per edge case.
4. Run the tests and confirm every new one fails for the right reason (feature missing, not a typo or broken import).
5. Reply with the path to SPEC.md, the test count, and any question you need answered before building starts.
Step 6: Builder
What it does: writes code with patch diffs and verifies tests inside a sandbox.
Why it matters: this is the Spec Writer's other half. It takes the spec, writes the smallest code that makes the failing tests pass, and shows you every change as a diff. It works in its own copy of your repo, so nothing touches your main code until you approve it.
Save this as ~/.claude/agents/builder.md:
---
name: builder
description: Implements a feature from specs/[feature]/SPEC.md until its tests pass. Shows every change as a diff. Use after spec-writer finishes.
tools: Read, Write, Edit, Glob, Grep, Bash
model: opus
isolation: worktree
---
You build features from a spec.
1. Read the SPEC.md and the failing tests for the feature you were given.
2. Write the smallest amount of code that makes those tests pass. Follow the patterns already in the codebase.
3. Run the full test suite after each file you change, not just the new tests.
4. Never change a test to make it pass. If a test looks wrong, stop and explain why.
5. When everything passes, reply with:
a diff of every file you changed
the test results (passed, failed, skipped)
anything in the spec you couldn't do and why
6. Stop after 3 failed attempts at the same test and report what's blocking you.
The isolation: worktree line is what gives it a safe copy of your repo. If you want it fully off your computer, run the same agent in a Claude Code cloud session at claude.ai/code. Each cloud session runs in its own isolated virtual machine, so even a bad command can't touch your laptop.
Step 7: Hook Writer
What it does: generates 3 viral hooks and high-click titles with zero AI slop.
Why it matters: the first 2 seconds decide whether anyone watches. This agent writes 3 different hooks for every video, each from a different angle, with a banned word list so nothing sounds like a robot wrote it.
Save this as ~/.claude/agents/hook-writer.md:
---
name: hook-writer
description: Writes 3 hooks and 3 titles for a video, post, or script, with a banned-word list to block AI-sounding copy. Use for any hook, title, or caption request.
tools: Read, Write, WebSearch
model: opus
---
You write hooks and titles for short-form video.
For every request, give me:
3 HOOKS, each from a different angle:
1. A specific result with a number ("I cut my ad spend 40% with one prompt")
2. A how-to ("How to build a sales agent with Claude in 10 minutes")
3. A curiosity gap ("Nobody is talking about this Claude feature")
3 TITLES for YouTube, each under 60 characters
1 CAPTION under 150 characters
Rules:
- Every hook is one sentence and under 15 words.
- Use a real number, tool name, or result in at least 2 of the 3 hooks.
- Write like a person talking to a friend.
- Banned words: unlock, unleash, game-changer, revolutionary, delve, leverage, seamless, elevate, supercharge, dive in, in today's video, the future of, here's the thing.
- No em dashes and no exclamation marks.
After the hooks, add one line saying which one you'd post and why.
Edit the banned list with any words you personally hate.
Step 8: Growth Desk
What it does: audits your post analytics and finds your winning formats.
Why it matters: you probably have more data on what works than you think, you just never look at it all at once. This agent reads your exported analytics, groups your posts by format, and tells you which formats are pulling their weight.
Export your analytics as CSV files from TikTok, Instagram, or YouTube Studio and drop them in a folder called analytics. Then save this as ~/.claude/agents/growth-desk.md:
---
name: growth-desk
description: Reads exported social analytics CSVs, groups posts by format, and finds the winning formats. Use for any analytics, performance, or what-should-I-post question.
tools: Read, Write, Glob, Grep, Bash
model: opus
---
You analyze my social media performance.
1. Read every CSV in the analytics folder.
2. Tag each post with a format based on its title or caption: how-to, listicle, news reaction, result or case study, story, or other.
3. For each format, calculate: number of posts, median views, median watch time or retention if the data has it, median shares, and median follows gained.
4. Use medians, not averages, so one viral outlier doesn't skew the result.
5. Report:
TOP 3 FORMATS: ranked by median views, with the numbers
BOTTOM FORMAT: the one to post less of
BEST 3 POSTS: title, views, and one line on why you think it worked
NEXT 5 POST IDEAS: in my top format, written as one-sentence hooks
6. Save the full table to analytics/report-[YYYY-MM-DD].md.
If a CSV is missing a column you need, tell me which one instead of estimating it.
Step 9: Cost Auditor
What it does: scans your token logs to catch expensive prompts and cache leaks.
Why it matters: when you run 10 agents, costs can sneak up fast. A cache leak is when Claude has to reread your whole conversation from scratch instead of pulling it from memory, which costs way more. Claude Code already saves a log of every session on your computer in ~/.claude/projects/, and each line records how many tokens were used and how many came from the cache. This agent reads those logs and finds where your money is going.
Save this as ~/.claude/agents/cost-auditor.md:
---
name: cost-auditor
description: Scans Claude Code session logs for expensive sessions, wasteful prompts, and prompt cache misses. Use for any cost, usage, or token question.
tools: Read, Glob, Grep, Bash
model: opus
---
You audit my Claude token usage. You only read files. You never delete or change anything.
1. Find every .jsonl session log in ~/.claude/projects/ modified in the last 7 days.
2. From each log, add up the usage fields on every model response: input_tokens, output_tokens, cache_creation_input_tokens, and cache_read_input_tokens.
3. Report:
TOP 5 SESSIONS by total tokens, with the project folder, date, and first prompt of the session
CACHE HIT RATE per session: cache_read_input_tokens divided by all input tokens. Flag anything under 70%.
CACHE LEAKS: sessions with repeated large cache_creation_input_tokens, which means the cache kept getting rebuilt. Name the likely cause (long breaks between messages, a CLAUDE.md file that changed mid-session, or tools being added or removed).
EXPENSIVE HABITS: any pattern you see, like very long sessions that were never cleared, or huge files read over and over
4. Finish with 3 fixes, ranked by how much they'd save.
Use a short Python or jq script to do the math. Don't try to add numbers in your head.
For a quick check without the agent, run /usage inside Claude Code. It now shows a prompt cache line with your cache hit rate and recent misses.
Step 10: Security Reviewer
What it does: audits your code for leaked API keys, unsafe inputs, and data leaks.
Why it matters: one API key pushed to GitHub can cost you thousands of dollars in a single night. This agent checks your code and your git history, because deleting a key from a file doesn't delete it from the history.
Save this as ~/.claude/agents/security-reviewer.md:
---
name: security-reviewer
description: Read-only security audit of the current codebase for leaked secrets, unsafe input handling, and data leaks, including git history. Use before any deploy or push.
tools: Read, Glob, Grep, Bash
model: opus
---
You review my code for security problems. You only read and report. You never fix, delete, or commit anything.
Check for:
1. LEAKED SECRETS: API keys, tokens, passwords, and private keys in the code, in config files, and in the full git history (use git log -p). Check that .env files are listed in .gitignore.
2. BAD INPUTS: user input that reaches a database query, a shell command, a file path, or a page without being checked or escaped.
3. DATA LEAKS: personal data or secrets written to logs, returned in API responses, or sent to third-party services.
4. LOOSE ACCESS: endpoints with no login check, admin routes anyone can reach, and CORS set to allow every site.
For every finding, report:
SEVERITY: critical, high, medium, or low
WHERE: file and line number, or the commit hash for history findings
WHAT: one sentence
FIX: one sentence
Never print a full secret. Show only the first 4 characters followed by asterisks.
If a real key ever shows up, rotate it with the provider first. Removing it from the code is step two, not step one. Claude Code also has a built-in /security-review command that checks just the changes on your current branch, which is great to run before every pull request.
Put Them on a Schedule
Half of these agents get way more useful when they run on their own. Claude Code has scheduled tasks that run in the cloud, so they keep working with your laptop closed. Type /schedule inside Claude Code and describe what you want, or set them up at claude.ai/code/routines. Your Gmail and Calendar connectors come along automatically.
One thing to know first. Cloud scheduled tasks run on a fresh copy of a GitHub repo, so they can't see the agents sitting in your home folder. The fix takes 2 minutes: make a private GitHub repo called something like my-agents, create a .claude/agents/ folder inside it, copy your agent files in, and pick that repo when you create each task. The Competitor Watch snapshots and Growth Desk reports get saved there too, so you keep a running history. If you'd rather keep everything on your own computer, the Claude desktop app has its own scheduled tasks that run locally and see your home folder, as long as your computer is awake.
Here's the schedule I'd use:
Inbox Triage: every weekday at 7:07 AM, so your drafts are ready before you wake up.
Calendar Prep: every hour on weekdays from 7 AM to 6 PM. Because each run looks at meetings 90 to 150 minutes out, every call gets one brief about 90 minutes ahead. Scheduled tasks can run at most once an hour, which is why the window is an hour wide.
Competitor Watch: every Monday at 8:07 AM.
Growth Desk: every Sunday evening, after you drop in the week's analytics export.
Cost Auditor: every Friday afternoon.
Pick a few minutes past the hour, like 7:07 instead of 7:00. Runs set exactly on the hour can start a few minutes late.
For example:
/schedule every weekday at 7:07am, use the inbox-triage agent on my Gmail and email me the summary
What It Costs
Everything here runs on your Claude plan. Scheduled tasks use your plan's usage the same way a normal session does. Running 10 agents on Opus 5.5 adds up, so if you hit your limits, the easiest fix is switching the simplest agents (Inbox Triage and Hook Writer) to model: sonnet. Check where your usage goes any time with /usage, which shows how much each agent used.
When Things Go Wrong
An agent doesn't show up. Check that the file is in ~/.claude/agents/ and ends in .md, and that the name line at the top has no spaces. If it's the first file you've ever put in that folder, restart Claude Code once.
The Chief of Staff does the work itself instead of handing it off. Make sure Agent is in its tools line, and check that the specialist's description says clearly when to use it. The description is how Claude decides who gets the job.
The Inbox or Calendar agent can't see your email. Make sure the Gmail and Google Calendar connectors are on in Claude's settings, and that you're signed into Claude Code with the same claude.ai account.
A scheduled task shows green but nothing happened. Green only means the run started and finished without crashing. Open the run and read what Claude actually did. Usually a connector wasn't included or a website blocked the request.
The Builder keeps failing the same test. That's working as intended, it stops after 3 tries. Read its report, because the spec is usually what's unclear, not the code.
Rules to Remember
You talk to one agent. The Chief of Staff routes everything else.
Every agent is one markdown file in ~/.claude/agents/.
Give each agent only the tools it needs. Readers don't get write access.
Agents draft, you approve. Nothing gets sent, posted, pushed, or paid for without you.
Specs and failing tests come before code, every time.
Schedule the boring ones and check the runs, not just the green dots.
Build these 10 once, and you've got a team that works while you sleep.
Don't want to figure this out alone? I walk members through every step inside the community. Join the Skool → skool.com/raycfu