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feat(cli): automatically detect coding agents - #145
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Enable the existing agent preset for recognized agent environments when stdout is piped and no explicit output format was requested. Select it before parsing so help and parse errors remain machine readable. Add --no-agent and ALTERTABLE_AGENT_MODE overrides, preserve explicit format behavior, and isolate human-mode tests from inherited agent markers.
leonkenneth
approved these changes
Oct 15, 2026
This was referenced Oct 15, 2026
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Coding agents currently need to pass
--agenton every invocation to receive structured output. Inspired by DuckDB’s agent detection, this change automatically enables the existing agent preset when a recognized agent environment marker is nonempty, stdout is not a terminal, and no explicit output format was requested.Detection happens before command parsing, so agents receive structured help and JSON errors as well as JSON results. Explicit
--jsonand--formatselections bypass automatic detection.Add
--no-agentandALTERTABLE_AGENT_MODE=1|0overrides. CLI flags take precedence over the environment, and--no-agentwins when both flags are supplied. Existing preset restrictions remain: commands that stream subprocess output, such asapp buildandapp dev, require--no-agentin detected agent environments.Update documentation and generated command references, add regression coverage, and isolate human-output tests from inherited agent settings.