A practical replacement trial
Start by naming the job you expect the tool to perform. Inline completion, conversational editing, repository-wide refactoring, pull-request review, and unattended issue work are different jobs with different permission and review costs. A tool that excels at suggestions may be a poor substitute for a terminal agent, while a capable agent may be unnecessary for teams that mainly want low-friction completions.
Run the same small set of representative tasks through each candidate. Record time to a reviewable diff, tests passed without intervention, correction rounds, context that had to be repeated, and whether rollback was obvious. Include one routine change, one unfamiliar-code task, and one task that should be refused or escalated. This separates a polished demo from a workflow that remains predictable when requirements or repository conventions are imperfect.
Before connecting private code, define the operating boundary: which repositories are allowed, whether shell execution is enabled, which secrets are unavailable, where prompts and code may be retained, and who can approve changes. Treat local or open-source availability as evidence to inspect, not proof of privacy. Deployment choices, telemetry, model endpoints, plugins, and update channels can change the practical data path.
Adopt in stages. Begin with a disposable or low-risk repository, keep branch protection and human review in place, and compare the trial against the current workflow for at least several real tasks. Expand only when the tool produces reproducible gains without hiding review effort, permission risk, or provider cost. The best alternative is the one whose failure mode your team can detect and reverse—not simply the entry with the highest score.