bun

Eight principles, scored

Behavioral and source checks. Every non-pass row carries a copy-paste remediation prompt.

1. P1
   Non-Interactive by Default

   no rich-TUI affordance detected (no `--tui`/`--interactive`/`--ui` flag, no spinner/progress/tui mention in --help). MAY-tier — rich TUI in TTY contexts is a nice-to-have, not required.

   Remediation · P1⧉ copy prompt

   Make bun satisfy P1 (Non-Interactive by Default) from the agent-native CLI standard. Address:
   - Rich-TUI affordance for TTY contexts (no rich-TUI affordance detected (no `--tui`/`--interactive`/`--ui` flag, no spinner/progress/tui mention in --help). MAY-tier — rich TUI in TTY contexts is a nice-to-have, not required.)
   Requirements: https://anc.dev/p1

   warn
2. P2
   Structured, Parseable Output

   --output/--format flag detected but could not validate JSON via safe probes (--help/--version override output flags in most CLIs) · CLI emits structured output but exposes no `schema` subcommand or `--schema` flag at top level or nested one level deep. Agents need a runtime-discoverable schema to pin against shape changes.

   Remediation · P2⧉ copy prompt

   Make bun satisfy P2 (Structured, Parseable Output) from the agent-native CLI standard. Address:
   - Structured output support (--output/--format flag detected but could not validate JSON via safe probes (--help/--version override output flags in most CLIs))
   - Structured-output CLI exposes its schema at runtime (CLI emits structured output but exposes no `schema` subcommand or `--schema` flag at top level or nested one level deep. Agents need a runtime-discoverable schema to pin against shape changes.)
   - --json / --jsonl short aliases for --output (no --json or --jsonl short alias found. Agents and pipelines benefit from short forms alongside the canonical `--output` enum.)
   - `--raw` flag for pipe-safe unformatted output (no `--raw` flag advertised. MAY-tier — useful for pipelines that want to strip formatting before piping to other tools.)
   - Bad invocation exits with structured usage-error code (2) (binary silently accepted invalid flag (exit 0). Bad invocation must signal usage error via a non-zero exit code.)
   Requirements: https://anc.dev/p2

   fail
3. P3
   Progressive Help Discovery

   no `examples` subcommand or `--examples` flag found. MAY-tier — a curated usage block keeps agents from hunting through long help text. · subcommands missing example invocations in their `--help`: lint. Examples teach agents the call shape faster than option tables; use clap's `after_help` or a dedicated `Examples:` block.

   Remediation · P3⧉ copy prompt

   Make bun satisfy P3 (Progressive Help Discovery) from the agent-native CLI standard. Address:
   - `examples` subcommand or `--examples` flag for curated usage patterns (no `examples` subcommand or `--examples` flag found. MAY-tier — a curated usage block keeps agents from hunting through long help text.)
   - Each subcommand's `--help` ships at least one invocation example (subcommands missing example invocations in their `--help`: lint. Examples teach agents the call shape faster than option tables; use clap's `after_help` or a dedicated `Examples:` block.)
   - Help text pairs human and `--output json` example invocations (no paired text + `--output json` example found within 5 lines in top-level or any subcommand `--help`. Pairing keeps agents from reverse-engineering the JSON invocation from the text one.)
   Requirements: https://anc.dev/p3

   fail
4. P4
   Fail-Fast, Actionable Errors

   binary silently accepted invalid flag (exit 0) · stderr was empty on bad invocation. Argument parsers must explain why the input was rejected — silent failure forces the agent to guess.

   Remediation · P4⧉ copy prompt

   Make bun satisfy P4 (Fail-Fast, Actionable Errors) from the agent-native CLI standard. Address:
   - Rejects invalid arguments (binary silently accepted invalid flag (exit 0))
   - Error messages include a hint or remediation phrase (stderr was empty on bad invocation. Argument parsers must explain why the input was rejected — silent failure forces the agent to guess.)
   Requirements: https://anc.dev/p4

   fail
5. P5
   Safe Retries & Mutation Boundaries

   All 2 checks pass.

   pass
6. P6
   Composable, Predictable Command Structure

   pager referenced in --help but no --no-pager escape hatch advertised · 3/6 subcommand(s) follow standard verb names. Non-standard: lint, x, repl. MAY-tier — community-standard verbs (get/list/create/update/delete) help agents predict subcommand behavior across CLIs.

   Remediation · P6⧉ copy prompt

   Make bun satisfy P6 (Composable, Predictable Command Structure) from the agent-native CLI standard. Address:
   - Pager-using CLI ships --no-pager escape hatch (pager referenced in --help but no --no-pager escape hatch advertised)
   - Subcommand verbs follow community-standard names (3/6 subcommand(s) follow standard verb names. Non-standard: lint, x, repl. MAY-tier — community-standard verbs (get/list/create/update/delete) help agents predict subcommand behavior across CLIs.)
   - `--color` flag for explicit color control (no `--color` flag advertised. MAY-tier — `auto|always|never` lets agents and pipelines override the TTY-based default.)
   - Input-accepting commands read from stdin when no file is given (input-accepting subcommand present but `--help` does not mention stdin or `-` as a path placeholder. SHOULD-tier — agents piping data into the tool expect stdin to work when no file arg is provided.)
   - Operations are subcommands, not verb-shaped flags (top-level verb-shaped flag(s) found: --install. Operations belong under the `Commands:` block (`tool search "q"`), not on the flag namespace where they fight the `--help` filtering agents rely on.)
   Requirements: https://anc.dev/p6

   warn
7. P7
   Bounded, High-Signal Responses

   no --quiet/-q flag detected in --help output · long-running subcommand present but no timeout flag advertised (looked for --timeout, --deadline, --max-time). SHOULD-tier — without a bound, agents that hit a hung operation have to enforce timeouts externally.

   Remediation · P7⧉ copy prompt

   Make bun satisfy P7 (Bounded, High-Signal Responses) from the agent-native CLI standard. Address:
   - Quiet mode available (no --quiet/-q flag detected in --help output)
   - `--timeout` flag for long-running operations (long-running subcommand present but no timeout flag advertised (looked for --timeout, --deadline, --max-time). SHOULD-tier — without a bound, agents that hit a hung operation have to enforce timeouts externally.)
   - Help text advertises TTY-aware verbosity behavior (no TTY-aware language found in `--help`. MAY-tier — automatic verbosity reduction when stdout is piped or redirected lets agents skip the explicit `--quiet` flag. Behavioral probes cannot simulate a real TTY without a pty crate, so this audit relies on documented intent.)
   Requirements: https://anc.dev/p7

   warn
8. P8
   Discoverable Through Agent Skill Bundles

   All 3 checks pass.

   pass