Issue 10
Studies: AI agents write more code but do not speed up delivery
A Harvard study found that AI coding agents write 30 percent more code but do not resolve more issues. A study covering 700,000 developers at 718 software companies found no increase in development speed or efficiency, and no significant improvement in Jira data.
Who is affected and how
- CTO
- Code volume is not a productivity metric, so the return on AI adoption should be measured by delivery and defect metrics.
- tech lead
- Team metrics should include closed issues and delivery time, not lines of code.
- senior developer
- The extra code also has to be reviewed, so the review burden may grow.
Google suspends open-source bug bounty programme after flood of AI-generated reports
Google has frozen product bug reports under its OSS VRP to curb a flood of AI-generated vulnerability reports. The news appeared in the press on 5 October 2026 and again on 10 October.
senior developerAs an open-source maintainer, triaging incoming reports is likely to be a bigger burden, so it is worth setting up filtering rules.startup founderIf you run your own bug bounty programme, expect a flood of AI-generated submissions.survey · globalStack Overflow 2026 survey: developers use AI daily but trust it little with big decisions
Stack Overflow has published its 2026 Developer Survey. According to the summaries, developers use AI but do not entrust it with major decisions, and they expect it to cite its sources. The survey…
tech leadWhen introducing AI tools, keep review and human sign-off for big decisions, because the team trusts the tool on that basis too.senior developerGiven the data on burnout and AI distrust, it is worth naming within the team which tasks go to AI and which do not.CTOWhen choosing tools, take into account that developers expect source attribution, and that Copilot ranks behind Claude Code in the survey.labour market · United StatesUS software developer job postings rise despite AI coding tools, as total postings fall
US software developer job postings have risen since Claude Code launched in February 2025, while overall job postings have fallen. According to the Hungarian report, the increase is 15 percent…
junior developerThe growth is concentrated in senior and AI-specific roles, so the entry level looks less favourable.senior developerThere is demand for senior profiles who add AI skills.CTOHiring plans should expect demand for senior roles and roles requiring AI knowledge.incident · globalAI agents reportedly deleted production databases in a recurring pattern, from Replit to Cursor
An agent running in Cursor and based on Claude reportedly deleted PocketOS's production database in April 2026. Earlier, Replit's agent deleted SaaStr's data, and Claude Code ran a command that wiped…
tech leadMandatory code-freeze and approval rules should be set for agents.Hungary
More key stories of the week
Hidden web instructions could trick GitHub Copilot CLI into leaking secrets
Hidden instructions on carefully constructed web pages could trick GitHub Copilot CLI into revealing secrets. The news was reported on 6 October 2026.
senior developerWhen running a CLI agent, restrict the secrets held in environment variables and files.tool change · globalAgent pull requests overtook human ones on GitHub in August as Copilot moves to usage-based pricing
Agent-authored pull requests on GitHub approached 75 million a month in August and exceeded the number of human PRs. Copilot usage has reportedly grown to 50 million, and Microsoft is introducing…
tech leadGiven the share of agent PRs, review capacity and PR rules need to be redesigned.CTOWith usage-based pricing, Copilot costs depend on load, so a spending cap should be set.senior developerMore agent PRs need to be reviewed, so review priorities should be set down in writing.labour market · globalAI coding could break the junior engineer pipeline, LeadDev says; Jensen Huang weighs in
LeadDev says AI coding tools could break the pipeline of junior engineers. In an interview with Ezra Klein, Jensen Huang said the junior path could be damaged before 2028.
junior developerEntry-level tasks may decline, so it is worth building skills in directing and checking agents.tech leadThe way juniors are trained needs rethinking, or the supply of future seniors will dry up.CTODropping junior positions from hiring plans could cause a long-term skills shortage.survey · United StatesSurveys: a large share of developers try to avoid AI
A survey also reported in Hungarian and a CNN report suggest that many software developers do not want to use AI. One person quoted by CNN said they tried it for coding but cannot get behind it.
tech leadBefore mandating AI use, assess why the team resists, because making it compulsory may meet pushback.senior developerDecide in your own workflow where AI delivers measurable benefit, and back that position with facts.tool change · European UnionOpenAI adds invisible watermarks to ChatGPT and Codex text in the EU
In line with EU regulation, OpenAI is starting to watermark text generated by ChatGPT and Codex. Hungarian trade media (HWSW, Bitport, the National Cybersecurity Institute) also covered it, and…
tech leadAssess to what extent text and code generated with Codex and delivered to EU customers is affected by the watermarking.CTOThe compliance policy should specify how AI-generated content is handled in the EU.release · globalGitHub launches ReviewBench, an open benchmark for AI code review
GitHub has launched ReviewBench, an open benchmark for evaluating AI-based code review agents, as a research preview. According to the articles, Anthropic expanded security access at the same time.
tech leadAn open yardstick is now available for comparing code review tools; it is worth using in purchasing decisions.QA testerThe benchmark helps evaluate how well AI reviewers detect defects.CTOAn independent benchmark can be used to check vendor claims before purchase.security · globalAnthropic offers free security scans to open-source projects and launches long-term critical infrastructure program
Anthropic is offering free AI security scans to open-source projects and has launched a long-term program to protect critical infrastructure and open-source software. It is fast-tracking AI-generated…
senior developerAs an open-source maintainer, consider applying to the program to have your project scanned for free.CTOOpen-source dependency risk management should take into account the new AI-based scanning options.tool change · globalGitHub Copilot comes to Windows with local models and sandboxed tools; what goes to the cloud is unclear
Microsoft is bringing local models and sandboxed tools to Windows and GitHub Copilot, and is giving Copilot file system access. According to The Register-style reporting, Microsoft does not say what…
CTOThe privacy benefit of local execution holds only if the scope of data sent to the cloud is known.open source · globalREA MCP server gives coding agents the ability to reverse-engineer binaries, APKs and Electron apps
REA (Reverse Engineer Anything, MIT licence) combines Hopper, Ghidra and IDA Pro into an MCP server and CLI for coding agents. The project has reached the top of GitHub with about 13,000 stars.
senior developerThe tool can be used with Claude Code, Codex and Cursor to understand legacy or undocumented code.tool change · globalGitHub Copilot routes requests across models with HydraFusion, cutting estimated cost by 67% on cheapest path
GitHub Copilot uses HydraFusion to route requests across models. On the cheapest path, the estimated cost falls by 67%.
CTORouting between models is one way to cut AI tooling costs and is worth building into the cost model.tech leadThe 67% figure is an estimate, so measure it against your own workload before it goes into the cost plan.tool change · globalCodex Auto-review goes free for ChatGPT users as GitHub changes Copilot review billing and Anthropic opens Claude Code Review beta
OpenAI says Codex Auto-review is free for ChatGPT users and does not count toward plan limits. GitHub is adding new organization billing and control options for Copilot code review, and Anthropic has…
tech leadAI review is now available from three providers, so it is worth piloting them on cost and impact.CTOBecause of the organization-level billing settings for Copilot code review, the budget needs to be set in advance.QA testerAutomated review can be used to pre-screen pull requests, but it does not replace your own checks.case · globalAI-generated code is burning out senior engineers in code review, analysis says
An analysis says AI-generated code is burning out senior engineers in code review. The proposed fix is to codify feedback and preserve intent.
senior developerRecurring review feedback should be recorded as rules so that automation can check it.tech leadPlan how review load is shared and how AI reviewers are introduced before reviewers burn out.