Vendor's own product: Microsoft's .NET team reports ten months (May 2025-March 2026) of using GitHub Copilot coding agent (CCA) in dotnet/runtime, the repository behind the .NET runtime, JIT, GC and core libraries. Maintainers explicitly assign bounded tasks; CCA works in a sandbox and opens a PR, and every PR, whether from CCA, staff or the community, also gets automatic Copilot Code Review. Early runs failed because the repo had no copilot-instructions file and the sandbox firewall blocked the NuGet feeds the build needs; the team added instructions and access first. Microsoft reports 878 CCA PRs (14% of all PRs), 535 merged, a 67.9% success rate versus 87.1% for Microsoft engineers' PRs, and 3 of 535 merged CCA PRs reverted (0.6%) versus 0.8% for other PRs (reported by Microsoft; the post says the data is directional, since tasks given to CCA were hand-picked and more bounded)
L2 · Supervised Verified · Production
Developer Tools — Software Development
1Password's engineers hand Codex well-defined user stories, which it breaks into functional specs and near-final prototypes for systems engineers to finish; Codex also reviews PRs before a human, runs acceptance tests in parallel worktrees, and investigates production issues by pulling evidence from incident management, telemetry, source control, paging and feature flags. Security is enforced by keeping secret references (not credentials) in repos and resolving them only when Codex calls an approved internal tool, plus AppSec policies packaged as reusable skills. OpenAI reports a 20.9% measured productivity improvement for the core cohort, a 10.9% cut in median PR cycle time, and investigation of a defect spanning 10+ microservices falling from about two hours to 5-20 minutes. 1Password's 553% ROI and ~$784K annual capacity value are modeled estimates (50 developers, $250K loaded cost, 40% 'directional' Codex attribution, 75% realization) (reported by OpenAI, citing 1Password)
L2 · Supervised Verified · Production
Software — Software Development
AgentMail's AgentID gives agents email-based identities tied to a human owner so services like Context.dev can allow autonomous agent signups without fraud.
L4 · Autonomous Unverified · Reported
Developer Tools — Software Development
Automated pipeline migrated ~3,500 Enzyme test files to React Testing Library with validation and retries (reported by Airbnb)
L3 · Conditional Verified · Production
Travel — Software Development
Code transformation agent upgraded tens of thousands of internal apps to Java 17.
L3 · Conditional Verified · Production
Technology — Software Development
AMD uses GitHub Copilot coding agent to auto-triage 1M+ nightly simulation failures, propose fixes for morning review, and Autofix to resolve ~70% of vulnerability classes automatically, compressing feature cycles from weeks to days across 20,000+ engineers on GitHub Enterprise (reported by GitHub / AMD)
L3 · Conditional Verified · Production
Semiconductors — Software Development