Recommended Free Tools
A failed compaction can leave an AI session without the summary it needs to continue. In a DEV Community post, OpenCode user geco describes losing access to session memories after a compaction returned an empty summary. The lesson is practical: save useful conversation history as work happens, rather than making compaction the only moment when memory is stored.
What happened when compaction failed
geco reports that an OpenCode session had reached 378,755 tokens of context when the author ran /compact. The model produced three output tokens, an empty summary, and a finish: length result. The memory plugin in use had saved everything inside that compaction call, so the author says the session was left with no memories.
These are the author’s account of one incident, not independently verified telemetry or evidence of a failure rate across OpenCode or other AI agent systems. The DEV Community page displays “Posted on Sep 17” but does not show a year.
Why saving only at compaction is risky
Compaction condenses a long conversation so an agent can continue with less context. If a system stores its memory only as part of that operation, a failed or empty summary may leave no saved record to rely on. Incremental persistence changes the timing: useful information is saved during the session, before a compaction is needed.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstall#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.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
geco describes the principle this way: “Save incrementally, while you work — so a failed compaction costs you a summary, not your past.” The design aims to make a failed summary less damaging; it does not establish that all forms of memory loss can be prevented.
How the OpenCode and MemPalace workflow is designed
The project named in the post, opencode-mempalace-persistence, connects an OpenCode plugin with MemPalace, a separate local-first system for storing and searching conversation text. The post describes version 2.1.0 and an MIT license; those are details from that post and may not match the repository’s current state. The repository identifies the plugin as a community project, not software officially maintained by the MemPalace team.
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.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 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.
According to the plugin’s documentation, its persistence and recall workflow includes:
- Periodic checkpoints: The plugin exports conversation history and has MemPalace process it on a configurable cadence. The current README says the save interval defaults to every 15 human messages, with a stated minimum of five.
- A pre-compaction save: The plugin documents an emergency save before compaction, so earlier conversation history is not dependent on the resulting summary.
- Exit and startup processing: The repository describes transcript exports and MemPalace mining on idle, exit, and startup.
- Optional history backfill: Existing session history can be imported, and transcript backfill can be rerun.
- Project separation: The plugin documents separate memory “wings” for projects, helping keep project context distinct.
- Search-based recall: When enabled, an OpenCode message-transform hook can add identity information and relevant search results to prompts.
These are documented design and behavior, not guarantees independently tested here. MemPalace describes itself as local-first: its repository says conversation text stays on the user’s machine unless the user opts in to sending it elsewhere.
Rank #3
- 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.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- 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.
Set up the plugin using the current repository instructions
The article’s high-level outline is to install MemPalace, configure the OpenCode plugin and local MCP server, create an identity file, and restart OpenCode. Exact setup steps can change, so use the live plugin README and MemPalace repository for current commands, configuration fields, and compatibility details. The plugin repository includes setup details for its configuration, MemPalace CLI installation, optional settings, and stated support for OpenCode v1 and v2.
One setting is especially easy to misunderstand: the current plugin README says auto-injection is off by default. Saving conversation history and automatically placing retrieved memories into later prompts are separate behaviors. Check the configuration rather than assuming that a successful save means later sessions will receive search results.
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
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- 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
- Install MemPalace using the CLI installation method in its current repository documentation.
- Configure the OpenCode plugin and local MCP server according to the plugin README, including any required paths and options.
- Create an identity file as described by the plugin, so the workflow has the identity context it expects.
- Review checkpoint and auto-injection settings, then restart OpenCode as the setup instructions specify.
Know what backfill can and cannot restore
The plugin distinguishes retained transcript drawers from knowledge-graph facts. Transcript backfill can be rerun and, according to the README, does not modify the knowledge graph. That makes transcript recovery different from repairing or refreshing extracted facts.
The repository warns that graph facts can become stale and may still be read as current until they are revisited. A saved transcript is therefore not the same as a perfectly current knowledge graph; important facts may need review when circumstances change.
Free tools Windows power users keep installed
One-click scans. No signup required.
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.
The article reports that the author’s one-time backfill recovered 9,448 messages across 1,735 drawers. Those figures describe that author’s project, not a typical recovery result. Separately, the plugin maintainers recount a prior duplicate-export incident involving 691 overlapping files, 628,000 drawers, and 5 GB, and say a cursor-on-write correction addressed it. That account is project-maintainer documentation, not an independent audit or performance benchmark.
What “infinite memory” means here
“Infinite memory” is a useful shorthand for retaining and searching conversation history beyond the active context window; it is not a literal guarantee of unlimited storage, perfect recall, or error-free recovery. MemPalace describes storing verbatim conversation text and retrieving it through semantic search. The plugin adds session-oriented exports and optional prompt injection, but outcomes depend on configuration and the underlying systems.
The MemPalace repository advertises “96.6% R@5 raw on LongMemEval — zero API calls” as its own benchmark claim. That is a project claim about MemPalace, not a verified benchmark of this OpenCode plugin or geco’s workflow; consult the project’s benchmark materials and date before treating it as comparative evidence.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
