# bird

Rust CLI for the X (Twitter) API

**Score:** 71% pass rate
**Principles:** 1/8 met

## Embed the badge

This score (71%) clears the [badge floor](https://anc.dev/badge) (70%). Copy this into your README:

```markdown
[![agent-native](https://anc.dev/badge/bird.svg)](https://anc.dev/score/bird)
```

| Status | Audit | Principle | Evidence |
|--------|-------|-----------|----------|
| PASS | Help flag produces useful output | [P3](https://anc.dev/p3) |  |
| PASS | Version flag works (`--version` plus short alias) | [P3](https://anc.dev/p3) |  |
| PASS | Version flag works (`--version` plus short alias) | [P3](https://anc.dev/p3) |  |
| WARN | Structured output support | [P2](https://anc.dev/p2) | --output/--format flag detected but could not validate JSON via safe probes (--help/--version override output flags in most CLIs) |
| PASS | Rejects invalid arguments | [P4](https://anc.dev/p4) |  |
| PASS | Quiet mode available | [P7](https://anc.dev/p7) |  |
| PASS | Handles SIGPIPE gracefully | [P6](https://anc.dev/p6) |  |
| PASS | Non-interactive by default | [P1](https://anc.dev/p1) |  |
| SKIP | Non-interactive gate flag advertised in --help | [P1](https://anc.dev/p1) | target satisfies P1 via alternative gate (help-on-bare or stdin-primary) |
| PASS | Flags advertise env-var bindings in --help | [P1](https://anc.dev/p1) |  |
| SKIP | Pager-using CLI ships --no-pager escape hatch | [P6](https://anc.dev/p6) | no pager signal (less/more/$PAGER/--pager) in --help |
| PASS | Respects NO_COLOR | [P6](https://anc.dev/p6) |  |
| PASS | Secret-bearing flags expose stdin or *-file companion | [P1](https://anc.dev/p1) |  |
| FAIL | Structured-output CLI exposes its schema at runtime | [P2](https://anc.dev/p2) | 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. |
| WARN | --json / --jsonl short aliases for --output | [P2](https://anc.dev/p2) | no --json or --jsonl short alias found. Agents and pipelines benefit from short forms alongside the canonical `--output` enum. |
| WARN | Subcommand verbs follow community-standard names | [P6](https://anc.dev/p6) | 7/29 subcommand(s) follow standard verb names. Non-standard: me, post, put, bookmarks, profile, thread, watchlist, usage, tweet, reply, like, unlike, repost, unrepost, follow, unfollow, dm, block, unblock, mute, unmute, cache. MAY-tier — community-standard verbs (get/list/create/update/delete) help agents predict subcommand behavior across CLIs. |
| PASS | Skill bundle has install path (`tool skill install [<host>]`) | [P8](https://anc.dev/p8) |  |
| PASS | `skill install --all` for multi-runtime install | [P8](https://anc.dev/p8) |  |
| PASS | `skill update` / `skill upgrade` for bundle refresh | [P8](https://anc.dev/p8) |  |
| WARN | `--raw` flag for pipe-safe unformatted output | [P2](https://anc.dev/p2) | no `--raw` flag advertised. MAY-tier — useful for pipelines that want to strip formatting before piping to other tools. |
| WARN | `--output` advertises additional formats beyond text/json | [P2](https://anc.dev/p2) | `--output` / `--format` flag found but no extra format tokens detected (looked for csv, tsv, yaml, yml, toml, xml, ndjson). MAY-tier — additional formats let downstream agents pick the shape that matches their pipeline. |
| WARN | `examples` subcommand or `--examples` flag for curated usage patterns | [P3](https://anc.dev/p3) | no `examples` subcommand or `--examples` flag found. MAY-tier — a curated usage block keeps agents from hunting through long help text. |
| WARN | `--color` flag for explicit color control | [P6](https://anc.dev/p6) | no `--color` flag advertised. MAY-tier — `auto\|always\|never` lets agents and pipelines override the TTY-based default. |
| WARN | `--verbose` flag for diagnostic escalation | [P7](https://anc.dev/p7) | no `--verbose` / `-v` flag advertised. SHOULD-tier — agents debugging failures need a way to escalate diagnostic detail. |
| WARN | `--limit` / `--max-results` flag for list operations | [P7](https://anc.dev/p7) | list-style subcommand present but no limit flag advertised (looked for --limit, --max-results, --max, --top, -n). SHOULD-tier — callers should be able to bound response size directly rather than scrape-then-truncate. |
| WARN | Cursor-based pagination flags for list traversal | [P7](https://anc.dev/p7) | list-style subcommand present but no cursor/page flag advertised (looked for --after, --before, --cursor, --page, --offset). MAY-tier — cursor pagination lets agents traverse large result sets without re-scanning earlier pages. |
| PASS | `--help` advertises default values for flags | [P1](https://anc.dev/p1) |  |
| WARN | Rich-TUI affordance for TTY contexts | [P1](https://anc.dev/p1) | 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. |
| PASS | Short `-h` summary differs from `--help` long form | [P3](https://anc.dev/p3) |  |
| SKIP | Input-accepting commands read from stdin when no file is given | [P6](https://anc.dev/p6) | no input-accepting subcommand detected (process/parse/convert/transform/analyze/validate/format/lint/audit); vacuous skip for the conditional SHOULD. |
| WARN | Subcommand naming follows a consistent verb/noun convention | [P6](https://anc.dev/p6) | subcommand naming is inconsistent: 1 non-verb subcommand(s) (watchlist) mix verb and non-verb children at the second level, so an agent cannot predict where the action lives. SHOULD-tier: pick a consistent shape (all verb-first, all noun-verb hierarchy, or any combination where each non-verb group's children are uniformly verbs). The verb list is a heuristic; inspect `--help` to confirm. |
| WARN | `--timeout` flag for long-running operations | [P7](https://anc.dev/p7) | 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. |
| PASS | Bad invocation exits with structured usage-error code (2) | [P2](https://anc.dev/p2) |  |
| PASS | Error messages include a hint or remediation phrase | [P4](https://anc.dev/p4) |  |
| FAIL | Errors emit JSON envelope with `error`/`kind`/`message` under `--output json` | [P2](https://anc.dev/p2) | bad invocation under `--output json` produced no parseable JSON on stderr or stdout. JSON mode must emit a JSON error envelope, not plain text. |
| WARN | `--output json` produces JSON-formatted errors | [P4](https://anc.dev/p4) | errors under `--output json` are not JSON-formatted. Consumers parsing stdout-as-JSON cannot recover the failure without a separate text-parsing path; switch the error writer to honor the active output mode. |
| SKIP | JSON success and error envelopes share their non-payload key set | [P2](https://anc.dev/p2) | success-mode probe (`--help --output json`) produced no parseable JSON; cannot compare envelope shapes. |
| FAIL | Each subcommand's `--help` ships at least one invocation example | [P3](https://anc.dev/p3) | subcommands missing example invocations in their `--help`: login, me, get, post, put, bookmarks, profile, search, thread, delete, watchlist, usage, tweet, reply, like, unlike, repost, unrepost, follow, unfollow, dm, block, unblock, mute, unmute, doctor, cache. Examples teach agents the call shape faster than option tables; use clap's `after_help` or a dedicated `Examples:` block. |
| WARN | Help text pairs human and `--output json` example invocations | [P3](https://anc.dev/p3) | 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. |
| PASS | Operations are subcommands, not verb-shaped flags | [P6](https://anc.dev/p6) |  |
| FAIL | Destructive subcommands require `--force` or `--yes` | [P5](https://anc.dev/p5) | destructive subcommand(s) without `--force` or `--yes`: delete. Irreversible operations must require explicit confirmation so they can't be invoked accidentally. |
| PASS | Read and write surfaces are both visible in subcommand list | [P5](https://anc.dev/p5) |  |
| PASS | Help text advertises TTY-aware verbosity behavior | [P7](https://anc.dev/p7) |  |

**Repo:** [brettdavies/bird](https://github.com/brettdavies/bird)
**Language:** Rust
**Version scored:** 0.1.3
**Audit date:** 2026-06-01 17:36:41 UTC
**Duration:** 411ms
**Platform:** `linux/x86_64`
**Mode:** command
**Anc build:** 0.5.0
**Install:** `brew install brettdavies/tap/bird`

## Reproduce locally

```bash
anc audit --command bird --output json
```