feat: auto-compact JSON output in agent contexts#108
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When stdout is not a TTY and the CI env var is unset, the CLI now auto-switches to compact JSON output to reduce token usage for AI agents. Explicit --json still pretty-prints, --ci takes precedence. - Add src/helpers/output.ts with isAgentContext() and formatJSON() - Update all commands with --json support to auto-detect agent context - Update always-JSON commands to use formatJSON() for compact output - Add test preload to set CI=1 so tests don't trigger agent mode - Update ARCH-003 ADR with new convention and Do's/Don'ts
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Summary
CIenv is unset, the CLI auto-switches to compact JSON (no whitespace/indentation) to reduce token usage for AI agents (~30-50% reduction)--jsonflag still pretty-prints;--ciflag takes precedence over auto-detectionsrc/helpers/output.tscentralizes detection (isAgentContext()) and formatting (formatJSON())Detection precedence
Files changed
src/helpers/output.ts,tests/helpers/output.test.ts,tests/preload.ts--jsonsupport, always-JSON commands, reporter, integration test harness,bunfig.toml,CLAUDE.md, ARCH-003 ADRTest plan
bun run validatepasses (438 tests, 21/21 ADR checks, build compiles)echo '' | bun run src/cli.ts checkoutputs compact JSONbun run src/cli.ts checkdirectly outputs human-readableCI=1 bun run src/cli.ts checkoutputs human-readablebun run src/cli.ts check --jsonoutputs pretty JSON