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<div style="display: none; max-height: 0px; overflow: hidden;">It’s possible to "steal" or reconstruct any React component from a production website, even without access to its source code </div>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.docusign.com%2F%3Futm_campaign=AWA_FY26Q4%26utm_medium=newsletter%26utm_source=tldr-web-dev/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/TAkyaKeFlD2ObDVhmGFFA2cgJvSwwyLsc2OQ7R5OBOU=440"><img src="https://images.tldr.tech/docusign-2.png" valign="middle" style="vertical-align: middle !important; height: 100%;" alt="Docusign"></a></td></tr></tbody></table>
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<h1><strong> TLDR Dev <span id="date">2026-01-13</span></strong></h1>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.docusign.com%2F%3Futm_campaign=AWA_FY26Q4%26utm_medium=newsletter%26utm_source=tldr-web-dev/2/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/WChtw5CJmSAqwFo9jxTKoxtw_0fVZdVe-Tkl2ed-4Y8=440">
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<strong>Docusign for Developers: APIs, SDKs, and Extensibility Beyond eSignature (Sponsor)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Many developers know Docusign as "the signature thing." But under the hood, there's a <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.docusign.com%2F%3Futm_campaign=AWA_FY26Q4%26utm_medium=newsletter%26utm_source=tldr-web-dev/3/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/spXeR-X1LZ0QqVLeu620rhAuMhWE2ppi-PJiW7zLDfA=440" rel="noopener noreferrer nofollow" target="_blank"><span>complete platform</span></a> for building intelligent agreement workflows.
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<p>The <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.docusign.com%2F%3Futm_campaign=AWA_FY26Q4%26utm_medium=newsletter%26utm_source=tldr-web-dev/4/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/gRNm84zC1mk-ujyY7QAzAno1rr6nTLmOk8pB1IfBGUw=440" rel="noopener noreferrer nofollow" target="_blank"><span>Docusign Developer Center</span></a> gives access to 400+ API endpoints across eSignature, workflow automation (Maestro), AI-extracted agreement data (Navigator), web forms, and more. SDKs are available in C#, Java, Node.js, PHP, Python, and Ruby.</p>
<p>The platform also supports extensions – custom apps that plug directly into Docusign to verify data, sync with external systems, or connect to cloud storage.</p>
<p>Adding contract management to a SaaS product? Automating document flows for an internal tool? Whatever you're building, the APIs and tooling are already there.</p>
<p><a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.docusign.com%2F%3Futm_campaign=AWA_FY26Q4%26utm_medium=newsletter%26utm_source=tldr-web-dev/5/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/z3P1v5CbNTnMgmc6HGIcceBGyXnH8eJ4uP4JcVBRo7c=440" rel="noopener noreferrer nofollow" target="_blank"><span>Get a free developer account →</span></a>
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<h1><strong>Articles & Tutorials</strong></h1>
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<strong>How to Steal Any React Component (6 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
It's possible to "steal" or reconstruct any React component from a production website, even without access to its source code. React Fiber is an internal tree structure in the browser that exposes which components create specific DOM elements and what props they receive. You can generate a component's code by collecting multiple examples of a component's props and its resulting HTML and feeding it into an LLM.
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<strong>How to build agents with filesystems and bash (3 minute read)</strong>
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A simple, effective architecture for AI agents is a standard filesystem and Bash tools. Since LLMs have a native understanding of code and Unix commands, agents can easily navigate and retrieve information from data structured as files, much like exploring a codebase. This approach overcomes the limitations of prompt stuffing and imprecise vector search by offering natural data hierarchies, exact retrieval, and minimal context loading.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fjessitron.com%2F2026%2F01%2F12%2Fmaking-ai-do-things-right-introduce-determinism%2F%3Futm_source=tldrdev/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/cddm9Rs-NXbDRb-3zssjpNdw7JR9Buf1IqrDqJHJf-8=440">
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<strong>Replacing LLM date math with deterministic scripts to improve calendar accuracy (3 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
LLMs like Claude frequently fail at date math, causing calendar errors in tools like gcalcli. Offloading calculations to deterministic scripts ensures accuracy. Developers can eliminate hallucinations and create reliable, repeatable AI workflows by updating CLAUDE.md instructions to execute code instead of manual reasoning.
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<div style="text-align: center;"><span style="font-size: 36px;">🧠</span></div>
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<h1><strong>Opinions & Advice</strong></h1>
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<strong>Anthropic made a big mistake (6 minute read)</strong>
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Anthropic recently made a business blunder by closing a loophole that allowed customers to use their cheaper subscription models with popular third-party coding agents like OpenCode. This move alienated many paying customers who felt they were unjustly restricted from using a service they already purchased. OpenAI capitalized on this by officially supporting its own subscriptions within these same third-party agents.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fcodemanship.wordpress.com%2F2026%2F01%2F12%2Fthe-great-filter-or-why-high-performance-still-eludes-most-dev-teams-even-with-ai%2F%3Futm_source=tldrdev/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/1HZum8pj6JGaQKq82i-nTL1LtnHuC85OLiUTGrwGP-o=440">
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<strong>The Great Filter (Or Why High Performance Still Eludes Most Dev Teams, Even With AI) (7 minute read)</strong>
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Despite the rise of AI-assisted coding, there's no widespread evidence of increased developer productivity or business value. DORA data shows that only already high-performing teams see benefits, while AI often slows down inefficient ones. The key differentiator for high-performing teams is addressing development process bottlenecks by adopting continuous, small-batch software work with tight feedback loops.
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<div style="text-align: center;"><span style="font-size: 36px;">🚀</span></div></div>
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<h1><strong>Launches & Tools</strong></h1>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fgo.clerk.com%2FWe3fqGq%3Futm_source=tldrdev/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/4tOm0iHXrQE6tSMyUmcX-BDrqV5GJMmtuPVg_-CI9n8=440">
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<strong>Build API key authentication for your SaaS with Clerk (Sponsor)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Step-by-step guide to adding API key support using Clerk's new public beta. Covers generating cryptographically secure keys, hashing and storing them safely, validating requests in your Next.js API routes, and building a key management UI with rotation and revocation. <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fgo.clerk.com%2FhtEDkOd/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/hRgr-VfQtVRTpVgBSFTf9y7uozQcrQcXR3udO6GPLcw=440" rel="noopener noreferrer nofollow" target="_blank"><span>Full code examples</span></a> included.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fclaude.com%2Fblog%2Fcowork-research-preview%3Futm_source=tldrdev/1/0100019bb74eed98-2b1d3212-57fc-42c4-af7c-a3ad4bf5b400-000000/58Qdj4IfO9Am1hsMtCWuxeNJGFqrMfGmR6qtc1RdthM=440">
<span>
<strong>Introducing Cowork (5 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Claude Cowork is a new feature that extends Claude Code to allow anyone, not just developers, to interact with Claude by giving it direct access to files on their computer. This allows Claude to read, edit, or create files within a designated folder, completing tasks like organizing documents or drafting reports with enhanced agency.
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<strong>Agent of Empires (GitHub Repo)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Agent of Empires is a Rust-written terminal session manager for Linux and macOS. It functions as a wrapper around tmux, creating a separate tmux session for each AI coding project and ensuring sessions persist reliably. The tool has a TUI dashboard for visual session management, including creation, attachment, detachment, deletion, and group organization.
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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