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The rule of three for evals says zero failures in N runs is a count, not a rate. With 0 failures in N independent runs, the exact 95% upper bound on the true failure rate is 1 - 0.05^(1/N) , which 3/N approximates. After 100 clean runs you still cannot rule out a 2.95% rate, about 1 in 34. Here is the reading that bites you. Your eval harness runs the agent 100 times, prints "0 failures," and the tile goes green. Someone screenshots it into the launch thread. The unspoken translation is "the failure rate is zero." It is not what the data says. I wrote a small script to make the gap concrete, so I ran a real gate over 200 deterministic agent runs first, counted honestly, and got the dashboard everyone trusts: gate: spend<=budget over 200 deterministic agent runs observed failures: 0 (distinct scenarios: 200) naive point rate : 0.00% binomial SE: 0.00 pp naive 95% CI : [0.00%, 0.00%] <- zero width: false certainty Look at the standard error. For a zero count the binomial SE is sqrt(0*1/200) , which is exactly 0, so the naive 95% interval collapses to [0.00%, 0.00%] . A zero-width confidence interval. The math is telling you it is completely certain, from 200 samples, that the true rate is precisely zero. That is obviously wrong, and it is the exact shape of every "all green" board I have ever trusted too much. TL;DR "0 failures in N runs" is an observed count, not a rate. The naive binomial SE of a zero count is 0, which is why a green board looks like proof and isn't. The honest number is the one-sided upper bound. With 0 failures in N runs, the 95% upper confidence limit on the true failure rate is 1 - 0.05^(1/N) . The rule of three, 3/N , approximates it and rounds the risk slightly up. At N=30 the bound is 9.50% (about 1 in 11). At N=100 it is 2.95% (1 in 34). At N=1000 it is 0.30% (1 in 334). Zero failures in 30 runs is compatible with a 1-in-11 true failure rate. To rule out a 0.1% rate at 95% you need about 2995 clean runs, not 50. "We ran it fifty times" and "

New data centers built through 2033 could consume as much electricity as India uses today.

When a gbase database cluster experiences an unclean shutdown — a sudden power loss or kernel panic — some metadata that was still in memory may never make it to disk. This can leave the critical gbase.table_distribution table with missing rows, causing queries against certain tables to fail with the error: ERROR 1149 (42000): (GBA-02SC-1001) Can't get distribution attribute of table `testdb`.`t2_test`, please check your gbase.table_distribution. The Symptom The affected table enters a contradictory state: Dropping it returns Unknown table . Re‑creating it returns Table already exists . The data files exist on disk, but the metadata record that describes how the table is distributed is gone. Root Cause GBase 8a stores critical table metadata — distribution type (hash or random), replication status, hash column — in the system table gbase.table_distribution . After an abrupt shutdown, this table may have missing entries, causing the cluster to lose track of the table's distribution properties. Recovery Options Option 1: Re‑insert the Metadata Row (Keeps Data Intact) This is the recommended approach when the data must be preserved. Insert the missing row directly into gbase.table_distribution . -- Insert the lost metadata record INSERT INTO gbase . table_distribution VALUES ( 'testdb.t2_test' , 'testdb' , 't2_test' , 'NO' , NULL , NULL , NULL , 'NO' , 2 ); -- Verify the row is now present SELECT * FROM gbase . table_distribution WHERE index_name LIKE '%t2_test%' ; Key fields: isReplicate : YES if the table is replicated, otherwise NO . hash_column : The distribution key column name (if hash‑distributed); NULL for random distribution. data_distribution_id : A numeric ID. Copy the value from another healthy table in the same database to keep it consistent. After inserting, restart the gcluster service so the metadata takes effect (the table_distribution table is managed by gcluster, not gnodes): gcluster_services gcluster restart The table should now be queryable again.

Bhavuk Jain discusses translating foundational AI into scalable mobile products. He shares the engineering challenges behind AI Wallpapers and Circle to Search, detailing how to implement robust runtime guardrails, fine-tuning, and seamless OS integration. For engineering leaders, he explains balancing UX constraints with model latency and infrastructure cost to deliver safe, reliable AI. By Bhavuk Jain

Yelp has launched Training Orchestrator. This new internal framework replaces individual team Spark training scripts. Now, it uses a configuration-driven, DAG-based execution model. By Claudio Masolo

AI coding assistants have transformed the way we build software. They can understand your code, generate features, and help with debugging but they usually have no idea what's inside your database. That's where Neo4j Laravel Boost comes in. It integrates the official Neo4j MCP server directly into Laravel Boost , giving any MCP-compatible AI client access to your live Neo4j database and graph tooling. Instead of managing multiple MCP servers, everything is exposed through your existing Laravel Boost server. Why Use Neo4j Laravel Boost? Once configured, your AI assistant can: 🔍 Inspect your live Neo4j schema 📝 Execute read and write Cypher queries 🧠 Query your Laravel container dependency graph 📊 Access Graph Data Science (GDS) procedures 🤖 Work through a single Laravel Boost MCP server Instead of relying solely on static code analysis, your AI assistant gains access to your application's graph data and architecture, making it much more capable. Installation Install the package using Composer. composer require --dev neo4j/laravel-boost Configure your Neo4j connection. NEO4J_URI=bolt://localhost:7687 NEO4J_USERNAME=neo4j NEO4J_PASSWORD=your-password Run the interactive setup. php artisan neo4j-boost:setup The setup wizard validates your Neo4j connection, configures the package, optionally installs the official Neo4j MCP binary, and can even spin up a local Neo4j Docker instance for you. Connect Your MCP Client Your AI client only needs a single MCP server configuration. { "mcpServers" : { "laravel-boost" : { "command" : "php" , "args" : [ "artisan" , "boost:mcp" ], "env" : { "APP_ENV" : "local" } } } } Whether you're using Cursor , Claude Code , or another MCP-compatible client, Neo4j tools become available alongside your existing Laravel Boost tools. Explore Your Laravel Dependency Graph One of the most interesting features of Neo4j Laravel Boost is the ability to export your Laravel service container directly into Neo4j. php artisan container:graph Once exported, yo

Every time this comes up, someone credits the same setup: Athena on Iceberg is where "the code is the spec" — where you open Git and read the whole system, catalog to transforms to schema, without logging into anything. In my experience they're not wrong. What I want to argue is that they're right for mostly the wrong reason. The reason people reach for is the engine — serverless, open format, nothing to provision. But the thing that actually keeps code as the spec, when it does, is something you could have applied to almost any engine. And the thing that breaks it, when it breaks, has nothing to do with Iceberg at all. So here's the split I've landed on, for now: whether "code is the spec" holds is about 90% discipline and 10% engine . Athena/Iceberg earns that 10% honestly — but 10% is all it earns, and I keep watching people mistake it for the whole thing. (Just where my own tinkering has led — not advice.) I should say up front that I'm still in the middle of this. What the best declarative setup for an agent actually looks like — how you turn a system into a spec it can read and act on without guessing — is something I'm actively testing, not something I've settled. Read what follows as a working idea at a particular moment, written down partly so I can find out where it's wrong. To see where the 10% actually lives, it helps to notice that a stateful system always keeps two copies of itself. The spec has two copies One copy is declared : the code you wrote, the schema you committed, the transforms in dbt, the catalog in Terraform. The other is realized : the state the engine accumulates while running — statistics, physical layout, caches, maintenance history, tuning knobs someone set at 2am. "Code is the spec" is really a claim about the distance between those two. When the declared copy explains almost everything about the realized one, you can reason about the system by reading Git. When it doesn't, you can't. Some of that state is declarable — you can pin a

If you have written any optimization code, you have met linear programming even if nobody called it that. "Maximize output without blowing the resource budget" is an LP problem, and the classic algorithm that solves it is the simplex method. It is worth understanding not because you will hand-code it (you'll usually call a solver), but because knowing how it moves makes you far better at modeling problems for it. Here is the algorithm stripped down to its logic. The problem shape Every LP problem has three parts: an objective function to maximize or minimize, e.g. Z = 5x1 + 4x2 a set of linear constraints, e.g. 6x1 + 4x2 <= 24, x1 + 2x2 <= 6 non-negativity: all variables >= 0 Geometrically, the constraints carve out a feasible region (a polytope). The optimum always sits at a corner of that region. The simplex method is just a smart way of hopping from corner to corner, uphill, until there is no higher corner to move to. The algorithm as pseudocode build initial tableau (add a slack variable per <= constraint) loop: compute Cj - Zj for each column if all (Cj - Zj) <= 0: break # optimal reached pivot_col = column with most positive Cj - Zj # entering variable ratios = RHS / pivot_col entries (only positive entries) pivot_row = row with smallest non-negative ratio # leaving variable pivot(pivot_row, pivot_col) # elementary row operations return solution from final tableau That's it. Four moves per iteration: score the columns, pick the entering variable, run the ratio test for the leaving variable, pivot. Repeat until the optimality condition holds. A quick worked run Take Maximize Z = 5x1 + 4x2 subject to 6x1 + 4x2 <= 24 and x1 + 2x2 <= 6. Add slack variables s1, s2, build the tableau, and iterate. The optimum lands at x1 = 3, x2 = 1.5, Z = 21. Two pivots and you're done. Simple on paper until the numbers get ugly. Where humans (and debugging) actually break The algorithm is clean. The arithmetic is not. A single wrong entry in one pivot silently corrupts every table

The openFDA enforcement API is free, keyless, and well documented on the surface. It is also full of failure modes that return HTTP 200 with quietly wrong data. Every number and error string below was measured against the live API on 2026-07-20; anything I could not reproduce has been cut. Pick the right endpoint first There are four recall-shaped endpoints and they are not interchangeable. Choosing wrong gives you a different universe of records with no warning. Endpoint Records What it is drug/enforcement.json 17,793 Recall Enterprise System (RES) drug recalls device/enforcement.json 39,519 RES device recalls food/enforcement.json 29,224 RES food recalls device/recall.json 58,756 CDRH device recall database, a different schema entirely The three enforcement endpoints share their schema. device/recall.json does not: its fields include cfres_id , product_res_number , k_numbers , root_cause_description , event_date_posted , event_date_terminated and recall_status , and it has no classification field at all ( count=classification.exact returns HTTP 404 "Nothing to count" ). If you are filtering for Class I, you want an enforcement endpoint. The two families also refresh on different clocks. On 2026-07-20 the three enforcement endpoints reported meta.last_updated of 2026-07-08, while device/recall.json reported 2026-07-17. The OR bug that silently returns the wrong answer This is the single most expensive trap, and it is undocumented. An unparenthesized OR discards every clause except the last one. All figures below are from food/enforcement.json . search=classification:"Class I" OR state:"CA" returns 4,003 - exactly the count for state:"CA" alone. Reverse the operands and you get 12,809 - exactly classification:"Class I" alone. Wrap it: search=(classification:"Class+I"+OR+state:"CA") returns 14,822 in both orders. That is the real union (12,809 + 4,003 - 1,990 overlap, and the AND of the two clauses does return 1,990). No error is raised in any case. The nastier varia

Why Your WeChat Mini-Program Work Is Actually Relevant US data engineering interviews prioritize hands-on experience with data pipelines, SQL, and scalable storage. WeChat mini-programs, though often seen as front-end tools, generate and process substantial backend data. If you designed the logic behind user actions, session management, or real-time updates, you already have transferable skills. The key is to stop describing the mini-program as a "feature" and start describing it as a "data system." Recruiters don't care about WeChat's UI components; they care about how you moved, transformed, and stored data. The Core Translation: From Mini-Program to Data Engineering When rewriting your resume, map each mini-program task to a standard data engineering function: User interaction logic → Event-driven data pipeline (e.g., Kafka, AWS Kinesis, or custom queues) WeChat cloud functions → Serverless compute (e.g., AWS Lambda, Azure Functions) Database reads/writes via WeChat API → NoSQL or relational database operations (e.g., MongoDB, MySQL, DynamoDB) Session tracking or analytics → ETL pipeline extracting user behavior data into a warehouse Do not use WeChat-specific terms like "wx.request" or "Mini Program SDK" without explaining the data they handled. Replace them with equivalent English terms. A Quick Side-by-Side Translation Table WeChat Term US Data Engineering Equivalent WeChat Cloud Database Managed NoSQL database (like MongoDB Atlas) Mini Program Backend with Cloud Functions Serverless data processing (AWS Lambda) User login & session management Authentication pipeline with token storage Real-time message push Event-driven notification system Reshaping Your Bullet Points: Before and After Generic bullet points kill your chances. Here is a concrete rewrite that turns a typical WeChat mini-program description into a data engineering achievement. Before (Chinese-English hybrid, vague): "Developed a WeChat mini-program for e-commerce with 50k users. Used wx.request

Edinburgh-based tech firm Craneware said customer data was stolen during a cyberattack. The company makes software that thousands of U.S. hospitals, pharmacies, and clinics rely on for billing patients, potentially exposing health data.

Your agent isn't hallucinating. It's reasoning correctly over the wrong inputs. Here's a failure pattern every team running agents in production has hit: An alert fires. The agent investigates: pulls metrics, checks recent deploys, scans logs, proposes a fix. The fix is confidently, articulately wrong. Instinct says blame the model (bad reasoning, needs a better prompt, maybe a bigger model). Then someone reconstructs what the agent actually saw. The metrics query returned a 5-minute-old cached aggregate. The deploy list was fetched before the relevant deploy landed. The log window was truncated at 1,000 lines and the line that mattered was #1,014. Given those inputs, the agent's conclusion was reasonable. It just wasn't debugging the incident that happened. It's garbage in, garbage out, with a twist that makes it worse for agents than for any previous software. A dashboard shows you the garbage. A human sees a stale chart and might notice the timestamp. An agent consumes the garbage silently and acts on it, with fluent reasoning layered on top. The output doesn't look like garbage; it looks like a confident, well-argued investigation. That confidence is what makes it dangerous. Why is this surfacing now For chatbots, context was mostly a retrieval problem over documents; mediocre retrieval meant a mediocre answer a human would shrug at. Three things changed with production agents: Agents act. A stale metric doesn't produce an off paragraph; it restarts the wrong service or pages the wrong team at 3AM. The cost went from cosmetic to operational. The input surface exploded. A production agent reads metrics, logs, deploy history, tickets, and chat from separate systems, each with its own latency, rate limits, caching, and clock. The "world" it reasons over is stitched together from partial snapshots, inside the model's reasoning loop, where nobody can inspect it. Errors compound. A single wrong input gives a slightly wrong answer. A 20-step investigation where step 3'

Hugging Face is urging users to rotate any access tokens stored on the platform and review account activity.

I watched my sister paste a CSV into on of our LLM overlords and ask a question then reword it and get a different number. That's the problem with letting an LLM both read your question and trust it's math. ADA splits the two jobs. Drop in a CSV or Excel file, get a dashboard, anomaly detection, a forecast, and plain-English answers, all calculated locally using pandas (locally in the sense of never leaving the server and going to the AI apis.). The LLM layer that you can use (it's optional) but that only sees column names and never your rows, and the whole thing works with zero API key if need be (not the LLM part of course). MIT licensed, solo-built, open to contributors (in fact would need help to make it move out of LLMs and have a few open issues). I wish to make it as LLM free as possible as I want to make it deterministic. Live demo: automated-data-analyst.streamlit.app Repo: https://github.com/saineshnakra/automated-data-analyst

A SQLite service can keep answering health checks while its WAL grows without a successful checkpoint. One forgotten read transaction is enough to reproduce the risk. Run a controlled drill: Enable WAL mode and create a small table. Open connection A, begin a read transaction, and keep it open. From connection B, commit batches of writes for 60 seconds. Sample WAL bytes and checkpoint results every second. Release A and observe recovery. PRAGMA journal_mode = WAL ; PRAGMA wal_checkpoint ( PASSIVE ); Record the three checkpoint counters plus duration, WAL file size, oldest transaction age, write latency, and free disk bytes. A green SELECT 1 says nothing about checkpoint progress. My fault-injection gate looks like this: Given: one reader holds its transaction When: 10,000 writes commit Then: writes remain bounded And: WAL growth triggers an alert before the disk budget When: the reader closes Then: checkpoint progress resumes and WAL size converges Do not start with an automatic TRUNCATE loop. A busy result is evidence of contention; aggressive checkpoints can add latency without fixing the reader lifecycle. First identify long transactions, ensure result iterators close, and define a maximum transaction age. SQLite’s WAL documentation explains that a checkpoint must stop when it reaches pages beyond an active reader’s end mark. This is why the drill needs concurrency rather than a synthetic file-growth assertion. Operational thresholds should be tied to a disk budget: alert when projected WAL growth reaches the remaining safe window, not at an arbitrary file size. The runbook should name how to find the oldest reader, how to shed writes, and when a restart is safer than waiting. A health check is useful only when it measures the subsystem that is failing.

Prisma and Drizzle connect as the postgres role and bypass Supabase RLS entirely, so your policies never protect ORM queries. Here's the fix. TL;DR: No. Prisma and Drizzle open their own direct Postgres connection and log in as the postgres role, which owns your tables and carries BYPASSRLS — so Row Level Security is skipped on every ORM query. Point your app's connection at a dedicated, non-owner NOBYPASSRLS role (and keep the auth check in your code), not at postgres . If you built your Supabase project assuming RLS is a safety net on the data itself, adding an ORM quietly punches a hole straight through it. Your policies are still there. They just never run for the ORM's connection. Here's the mechanism, the myth to unlearn, and three fixes in order of how much you should reach for them. Does Prisma respect Supabase RLS? No. RLS is not a global property of the database — Postgres enforces it per role, per statement . A policy only bites for a role that is (a) not the table's owner, (b) has no BYPASSRLS attribute, and (c) is not a superuser. The Supabase JS client satisfies all three because it reaches Postgres through PostgREST, which runs your query as the unprivileged anon or authenticated role. Prisma and Drizzle satisfy none of them: they read DATABASE_URL and open a raw SQL connection as postgres , which owns virtually every table you migrated and holds BYPASSRLS . Either fact alone is enough for Postgres to skip your policies. So the same query that returns one tenant's rows through supabase-js returns every tenant's rows through Prisma. That is not a bug in your policy — it's the connection role. Two doors into the same database There are two completely different paths to your data, and they authenticate as different roles. The supabase-js path (RLS enforced). supabase-js talks HTTP to PostgREST, not to Postgres directly. PostgREST connects as authenticator , validates the request JWT, and does a SET ROLE into anon or authenticated for the statement. Those

This report analyzes pricing shifts across 35 developer tools tracked over a seven-week period from 2026-W19 to 2026-W29. We have identified 37 total pricing changes during this window, providing a clear snapshot of how platform tiers are evolving for engineering teams. GitHub Copilot’s Tier Expansion GitHub Copilot has seen significant activity in its subscription structure over the last two months. On May 25, the platform solidified its existing pricing, maintaining the Free tier at $0, Pro at $10/mo, and Pro+ at $39/mo. By June 15, the service introduced a "Max" tier priced at $100/mo. This was followed on July 12 by the addition of two enterprise-focused options: Business at $19/mo and Enterprise at $39/mo. Cursor’s Rapid Plan Iterations Cursor has undergone a series of rapid adjustments to its tiering model since late May. On May 25, the platform introduced a Free Hobby plan and a $20/mo Pro plan while removing the Individual tier. This structure was short-lived; on June 15, the platform removed both the Hobby and Pro tiers, replacing them with a single $20/mo Individual plan. As of the latest tracking, the current price for the Cursor Pro plan is listed at $20/mo. Netlify and Windsurf Pricing Shifts Infrastructure and IDE-integrated tools are also shifting their cost models. On July 12, Netlify moved its Enterprise tier from a "contact sales" model to a defined starting price of $500/month. Windsurf also saw a notable change on June 15 regarding its Teams offering. The price shifted from a flat $40/user/month to a base of $80/mo plus an additional $40/mo per seat. This follows Windsurf's earlier introduction of a Free ($0/month) tier on May 25. Vercel and Firebase Updates Platform-as-a-Service providers have focused on refining their entry-level and usage-based offerings. On May 25, Vercel added a Free Hobby plan and updated its Pro tier to $20/mo (plus additional usage). During that same week, Firebase added a Spark plan ($0) and a usage-based Blaze plan, whi

Rds challenge lab devto post 🗄️🐬 aws #rds #database #tutorial Build Your DB Server and Interact With Your DB INTRO Did a hands-on AWS challenge lab on Amazon RDS. Task: spin up a managed database, connect from a Linux server, and run real SQL — create tables, insert data, join across tables. No hand-holding here, just requirements to figure out myself. Here's the walkthrough. SCENARIO Service: Amazon RDS Role: Cloud/DB Admin Goal: Launch RDS under set constraints, connect via EC2, run SQL (create, insert, select, join) ARCHITECTURE LinuxServer (EC2) sits in the Lab VPC — this is the client RDS instance (Aurora or MySQL) in the same VPC Security group lets LinuxServer talk to RDS Flow: LinuxServer -> MySQL client (port 3306) -> RDS -> tables STEP 1: LAUNCH THE RDS INSTANCE Constraints for this lab: Engine: Aurora (Provisioned) or MySQL — no serverless Template: Dev/Test or Free tier No standby instance (single-AZ only) Instance size: db.t3.micro to db.t3.medium Storage: gp2, up to 100 GB — no Provisioned IOPS Network: Lab VPC Security group must allow LinuxServer access MySQL only: turn off Enhanced Monitoring On-Demand only These limits keep costs in check — Provisioned IOPS and Multi-AZ are the fastest ways to blow up an RDS bill. Noted the master username, password, and endpoint — needed next. STEP 2: CONNECT TO THE LINUX SERVER Downloaded the PEM key, grabbed the LinuxServer address, connected over SSH: chmod 400 labsuser.pem ssh -i labsuser.pem ec2-user@<LinuxServer-address> This box is just the SQL client — it needs network access to RDS, nothing more. STEP 3: INSTALL MYSQL CLIENT AND CONNECT On the LinuxServer: sudo yum install mysql -y Connect using the master credentials from Step 1: mysql -h <rds-endpoint> -u <master-username> -p If it hangs, it's almost always the security group — check port 3306 inbound. STEP 4: CREATE THE RESTART TABLE CREATE DATABASE lab_db ; USE lab_db ; CREATE TABLE RESTART ( StudentID INT , StudentName VARCHAR ( 100 ), RestartCity VA

Python quickstart: nutrition data in 10 lines You can search Dietly's public nutrition catalog with one GET request to https://api.getdietly.com/search . The response is a JSON array of foods, not an object with a results property. Install requests , run the example below, and you have a working nutrition lookup. The rest of this page turns that single call into something dependable: a client class, correct field handling, and retries that respect the rate limit. Make your first request The only required parameter is q (minimum two characters). Use limit to cap results between 1 and 50. Ten is plenty while you explore. import requests r = requests . get ( " https://api.getdietly.com/search " , params = { " q " : " greek yogurt " , " limit " : 5 }, timeout = 10 ) r . raise_for_status () foods = r . json () for food in foods : print ( food [ " name " ], food . get ( " protein_g " )) Understand the fields you get back Each result is a flat object. Nutrient values are per 100 g of the product unless noted, and any nutrient can be null when the source label did not list it. Treat null as unknown, never as zero. Field Meaning id Stable Dietly food ID, used for direct lookups name , brand Product name and brand when known calories_kcal Energy per 100 g protein_g , fat_g , carbs_g Macronutrients per 100 g fiber_g , sugar_g , saturated_fat_g , sodium_mg Detail nutrients per 100 g, often null serving_size_g , serving_desc One serving in grams and its label wording, when provided source , confidence Where the record came from and how sure Dietly is static_url Path to the food's page on getdietly.com, when one exists To convert a per-100 g value to a portion, multiply by grams and divide by 100. For a 150 g serving of a food with 10 g protein per 100 g, that is 10 * 150 / 100 = 15 g. Read the result defensively An empty search is [] , which is a normal outcome rather than an error. Guard for it, and keep null nutrients as null in your own model. food = foods [ 0 ] if foods else

I don lose count of how many times I don see this kind yarns online: "Backend development na just CRUD. Everything else na decoration." And honestly? I sabi why people dey talk am. E no kuku wrong. E no just complete, na like when person say "cooking na just to heat food." Technically, e dey true. But e dey miss almost everything wey make am skill. Make I carry you waka through wetin I mean, using something wey all of us don do before: to order food for app. First, Wetin CRUD Really Be CRUD mean Create, Read, Update, Delete, na the four things you fit do to any piece of data. Operation Wetin e dey do Normally e go be Create Add new data POST /orders Read Fetch existing data GET /orders/482 Update Change existing data PATCH /orders/482 Delete Remove data DELETE /orders/482 You place order, that na Create. You check where the order dey, that na Read. You change delivery address before dem ship am, na Update be that. You cancel am, that one na Delete. Change "order" to "post", "message", or "appointment" and you don describe almost every app wey dey for your phone. If you dey new for backend work, to build small CRUD API na genuinely good way to learn. You go jam routing, HTTP methods, request validation, database, and ORM almost by accident. Na exactly why every bootcamp dey start you off with building Todo app. But see this thing, to build only the CRUD part of that food order na maybe 10% of the real engineering work. Make we follow that one order through everything else wey suppose happen. "Who Even Dey Ask?" — Authentication Somebody send this: DELETE /orders/482 Fine. But who you be sef? If anybody at all fit hit that endpoint, you no get API, you get public database with extra steps. Before any Create, Read, Update, or Delete happen, backend need answer one question first: who dey make this request? That one na authentication, JWT, session cookie, OAuth, whichever flavor you dey use. "Dem Get Permission Do That?" — Authorization Say two different people send tha