Custom agent use cases: 12 real examples
Agentic Feats lists 12 sourced examples of Custom agent in real work; 8 link the artifact; most common job types: coding (3), ops and IT (3). Newest first.
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- 12
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- 1
- Updated
- Oct 13
Four months in, the agent remembers over 470 people and 51 agents across 13 platforms, and collaborated on an open source project unnoticed.
Persistent-identity Claude Code agent
The author built Instar, a framework giving Claude Code persistent memory, identity and safety gates, so the agent runs jobs and email on its own.
A dashboard and chatbot that merge tasks from calendar, mail, Linear, GitHub, Slack and meeting notes into one scored, prioritized view the author uses daily.
Daily planning agent across work tools
The author built Plan My Today, a read-only agent and MCP server that pulls tasks from many work tools and prioritizes them for the day.
It wrote a 3,000 word document with competitor pain points, 40 named target users, and an outbound playbook.
Agent researches its own competitors
Daemora, a self-hosted agent, searched Reddit, HN, Twitter and review sites unprompted and wrote a competitor analysis and go-to-market plan from one task.
Used across Cursor's 400+ person sales org, it reportedly helps SDRs book 3x more qualified meetings and cuts AE ramp time by over 50%.
Internal sales AI for Cursor reps
Cursor's Head of Enterprise Growth built ChatGTM, an internal chat tool that pulls CRM, call, and web data to draft outreach and research accounts.
The Codex agent resolved the issue in 40 minutes, and the ops agent confirmed the fix in Slack.
Slack issue triage to Codex fix
An internal ops agent triaged a Slack issue, passed it to a Codex agent, and then verified the fix back in Slack.
On a payment service v2 to v4 test, it caught an outdated SDK, returned DO NOT SHIP YET, then SAFE TO SHIP in simulation.
Pre-deploy release gatekeeper agent
The author built SHIPCHECK, a ReAct agent that queries a Sanity Content Lake over MCP to check whether a service upgrade is safe before deploy.
A live game with 87 rules, 33 conditions, 14 spells and 15 monsters in two editions, answering rules questions in about 1.3 to 2.2 seconds.
Rule-citing AI dungeon master game
The author built a browser D&D 5e dungeon crawl whose AI Dungeon Master answers rules questions by looking up and citing rules stored in Sanity.
The orchestrator produced a complete video with clips, music, and effects, shown in a linked video.
Agent-orchestrated AI video
The author's custom agent dimul used Grok through the CLI as an orchestrator, generating clips with Imagine and assembling them into a finished video.
A working personal agent the author reaches by Matrix from phone, home web app, or CLI agents.
Self-hosted Matrix agent assistant
The author had Kimi set up a local Matrix server and write a small custom agent loop with sandboxed tools.
Db2 support shipped in under two days for a $4172 token bill, versus 9 months and about $160K for Oracle; 27 PRs merged.
Hospital-style agent pipeline ships Db2 support
Cockroach Labs ran a multi-role coding agent pipeline modeled on a teaching hospital to add Db2 support to its MOLT migration tool.
A working pipeline that outputs picks, performance metrics and a chart, with a 63-day backtest against an equal-weight benchmark and a test suite.
Multi-agent stock analysis pipeline
The author built a LangGraph system where valuation, sentiment and fundamental agents plus a coordinator rate four stocks and backtest the resulting portfolio.
A working prototype runs on the handset over mobile data: typed chat via DeepSeek, battery check, torch, calls and alarms, tested on the phone.
AI chat app on Nokia 110
Codex helped the author reverse-engineer a Nokia 110 4G's firmware and build a native AI chat app with a custom agent.
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Proof marks:Shown artifact linked·Numbers a specific number stated·Claim claim only