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Configure a coding agent for a reliable pre-edit phase by asking it to investigate one specific behavior, map that behavior to source files and tests, and report what remains uncertain before it writes code. Then add only durable project rules to the instruction file supported by your agent’s harness, and verify that the file is being discovered.
Set a bounded inspection task
Do not begin with “understand the whole codebase.” Give the agent one concrete question about the change you plan to make—for example, where a request is authorized, where a form saves data, or where an API response is assembled. A focused question gives the investigation a useful boundary and makes its findings easier to check. Visual Studio Code’s guide to exploring a codebase with an agent recommends this question-led approach.
Ask for a source-backed map before asking for implementation. The report should identify likely entry points, trace the relevant calls, locate associated tests, and cite the source files or passages that support its explanation. It should also list unresolved questions rather than fill gaps with assumptions. Keep the requested output concise enough to review.
Verify the map before passing context forward
Treat the agent’s explanation as a hypothesis, not an authoritative description of the project. Open the named files and check whether the code supports the reported behavior and call path. Confirm that any tests it names are actually relevant to the behavior you intend to change. Visual Studio Code advises starting with source reading; dependency installation or running the application may not be necessary for initial exploration. Decide whether runtime confirmation is needed after checking the repository’s setup instructions. Read the codebase exploration guide.
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#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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Once you have checked the map, give the agent the relevant files as context for the implementation task. That keeps the next step focused on the code already identified instead of repeating a broad repository search.
Put persistent rules where your harness expects them
Instruction files are harness-specific: a filename recognized by one tool is not automatically recognized by another. Visual Studio Code’s customization guidance recommends AGENTS.md for OpenAI Codex, .github/copilot-instructions.md for GitHub Copilot, and CLAUDE.md for Claude Code. Check the documentation for the exact harness and version you use before relying on a filename or location. See Visual Studio Code’s customization guidance.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
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- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Use persistent instructions for durable expectations the agent cannot reliably infer from the source, such as repository conventions or a requirement to inspect relevant code and tests before proposing edits. Avoid copying facts already obvious in the code into an instruction file; that creates maintenance work without adding useful context.
Choose repository-wide or path-specific scope
Repository-wide instructions suit conventions intended to apply across the project. If a rule applies only to certain directories or file types, use a supported path-specific mechanism. Visual Studio Code documents .github/instructions/**/*.instructions.md for matching Copilot instructions and .claude/rules for Claude rules. GitHub’s Copilot code-review documentation also describes repository-wide .github/copilot-instructions.md, additional AGENTS.md context, and path-specific .github/instructions/**/*.instructions.md. These are examples for the named tools, not interchangeable conventions for every agent. Visual Studio Code: custom instructions · GitHub Copilot code review instructions.
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- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
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- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Separate inspection from editing when the tool supports it
Some tools offer a mode for exploring without making changes. Cursor’s documentation describes Ask as a way to search a codebase and answer without changing files; it describes Manual as a mode for edits to explicitly selected files without searching or running commands. This is a product-specific example, and the documentation does not establish that other tools have equivalent modes or guarantees. Check the current behavior in your tool’s documentation before relying on it. Cursor modes documentation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When instructions appear to be ignored
Check discovery and scope before adding more text. Confirm that the instruction file has the expected name, is in a location the selected harness reads, and applies to the files or task in question. For path-specific rules, check that the target files match the configured pattern. A rule outside the harness’s discovery mechanism—or outside its scope—cannot guide the task. Visual Studio Code’s custom-instructions guide explains instruction discovery and scope: Use custom instructions in VS Code.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
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- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
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