Automatic checks

An agent saying “done” is not proof. After a bigger change, Syntic Code has a second, read-only agent look at what was changed and compare it with what you asked for. The result is one line at the end of the turn, so you know how much to trust the work before you look at it yourself.

The Checked: line

Checked: PASS — the retry now backs off and the two new tests cover it

When the check does not run, you may still see a simpler line, based on whether a test or other command ran after the last edit:

When it runs

The check runs at the end of a turn in your main conversation when any of these is true:

• the turn wrote three or more files;
• it changed a backend or configuration file: for example .toml, .yaml, .env, .sql, .tf, .proto files, or code under folders such as api/, server/, db/, migrations/, infra/, deploy/, k8s/ or .github/;
• your request asked for the work to be finished (“finish the migration”, “tell me when it’s done”).

It does not run in plan mode, inside sub-agents, for turns that changed nothing, or when you turn it off.

What the checker sees and can do

The checker is the built-in verification agent. It gets your request, the git diff of the files the turn wrote, and the commands the turn ran. It can read, search and look things up (Read, Glob, Grep, web tools) but cannot edit, write or run commands, so a check never changes your project.

Turn it off or give it more time

{ "verification": { "enabled": true, "maxSeconds": 300 } }

In scripts

With -p --output-format json, the result carries a verification object: verified (true or false) and line (the line shown above), plus verdict, summary, evidence, trigger, files, checks and duration_ms when the checker ran. See Scripting & CI.

Sub-agent reports are checked too

When a sub-agent finishes and reports that it created files, edited them, ran commands or got tests passing, the main agent checks those claims against what really happened: the sub-agent’s own tool calls, the files on disk and git status. The report then ends with a verdict such as:

[verification: PASS — 1 file claim, 1 command claim checked]

PARTIAL or UNVERIFIED means some claims could not be matched to evidence. Reports with nothing to check (an answer, a plan) get no verdict.