Snapshot the current violations into a baseline file, so a later `alint check --baseline <file>` fails only on NEW violations. The one-step way to adopt alint as a blocking gate on a legacy repo: `alint baseline` (commit it), then gate on the delta. The baseline is whole-tree; `--changed` is not accepted
Usage: alint baseline [OPTIONS] [PATH]
Arguments:
[PATH] Root of the repository to snapshot. Defaults to the current directory [default: .]
Options:
-c, --config <CONFIG> Path to a config file
--output <FILE> Where to write the baseline. Default: `.alint-baseline.json` at the repo root
--accept-new Allow the regenerated baseline to grandfather violations not already present in the existing file. Without it, `alint baseline` refuses to ADD new entries (and prints a `+N / -M` summary) so re-running it to prune fixed entries can't silently accept new debt. Stale-entry removal never needs it
-f, --format <FORMAT> Output format [default: human]
--fail-on-warning Treat warnings as errors for exit-code purposes
--show-notes List informational notes (non-violation findings, e.g. entries a rule skipped rather than failed on) in full on stderr. By default only a one-line count is shown
--color <WHEN> When to emit ANSI color codes in human output. `auto` (the default) inspects TTY + `NO_COLOR` + `CLICOLOR_FORCE`. Only affects the `human` format; `json` / `sarif` / `github` / `markdown` / `junit` / `gitlab` / `agent` are always plain bytes [default: auto] [possible values: auto, always, never]
--ascii Force ASCII glyphs in human output (e.g. `x` instead of `✗`). Auto-enabled when `TERM=dumb`
--compact Compact one-line-per-violation human output, suitable for piping into editors / grep / `wc -l`. Format: `path:line:col: level: rule-id: message` (the `:line:col` is omitted for findings with no specific location)
--width <COLS> Override the human-output column width. Default: detected terminal width (TTY only) or 80. Useful for reproducible captures (asciinema/screen recordings) and for piping into fixed-width log viewers. Clamped to [40, 120]
--no-docs Suppress per-violation `docs:` URLs in human output. Useful for narrow terminals, screen recordings, and CI logs where long URLs disrupt visual alignment. URLs remain in JSON / SARIF / GitHub / markdown output regardless
--progress <WHEN> When to render progress on stderr for slow operations (currently `alint suggest`). `auto` (the default) renders when stderr is a TTY; `always` forces; `never` silences. Progress always lives on stderr — `--format` JSON output on stdout stays byte-clean [default: auto] [possible values: auto, always, never]
-q, --quiet Suppress progress and any stderr summary lines. Alias for `--progress=never` plus suppression of the "found N proposals in Ts" footer that `suggest` prints
--baseline <FILE> Suppress violations recorded in the given baseline file (see `alint baseline`), reporting only new ones. Pre-existing findings are grandfathered so `check` can gate a legacy repo on new violations only. A missing or unreadable baseline is an error (never a silent no-op). The path is resolved relative to the current directory (not the checked PATH); the `baseline:` config key, by contrast, resolves against the repo root
--strict-baseline With `--baseline`, fail (exit 1) when the baseline has stale entries (recorded findings that no longer fire — usually because they were fixed). Forces the committed baseline to stay exactly accurate. Off by default: fixing things never fails the build
--show-baselined With `--baseline`, list the suppressed (baselined) findings on stderr in full, rather than just a one-line count. Parallels `--show-notes`
--only <RULE_ID> Restrict the run to the named rule id(s) from the effective config (repeatable). Other rules are skipped entirely. An id that matches no loaded rule is an error, so typos fail loudly rather than silently linting nothing. Applies to `check` and `fix` (the `agent` format emits `fix --only <rule-id>`); rejected on any other subcommand. Global so the bare `alint --only <id>` lints the current directory like `alint check --only <id>` — to lint a different path, use the explicit form `alint check --only <id> <path>`