deno CLI

Eight principles, scored

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

1. P1
   Non-Interactive by Default

   5 flag(s) found in --help but no `[env: NAME]` bindings advertised · no default-value annotations found in --help. SHOULD-tier — agents reading help text need to see what value a flag falls back to when omitted (`[default: <value>]` per clap convention).

   Remediation · P1⧉ copy prompt

   Make deno satisfy P1 (Non-Interactive by Default) from the agent-native CLI standard. Address:
   - Flags advertise env-var bindings in --help (5 flag(s) found in --help but no `[env: NAME]` bindings advertised)
   - `--help` advertises default values for flags (no default-value annotations found in --help. SHOULD-tier — agents reading help text need to see what value a flag falls back to when omitted (`[default: <value>]` per clap convention).)
   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 deno 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) (bad invocation exited with code 1. The 0/1/2/77/78 convention reserves code 2 for usage errors; using a different non-zero code (often 1) blurs the distinction between usage errors and general failure.)
   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. · `-h` and `--help` produce byte-identical output. SHOULD-tier — clap renders the short summary on `-h` and the full description on `--help` when `long_about` is set; collapsing them gives agents no concise list-level grep target.

   Remediation · P3⧉ copy prompt

   Make deno 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.)
   - Short `-h` summary differs from `--help` long form (`-h` and `--help` produce byte-identical output. SHOULD-tier — clap renders the short summary on `-h` and the full description on `--help` when `long_about` is set; collapsing them gives agents no concise list-level grep target.)
   - Each subcommand's `--help` ships at least one invocation example (subcommands missing example invocations in their `--help`: run, watch, serve, eval, fmt, lint, test, upgrade, cache, check, info, doc, task, bench, compile, coverage, repl, install, uninstall, types, init, create, jupyter, publish, add, remove, outdated, update, sandbox, clean, list, link, unlink, approve-scripts, lsp, vendor, bundle, audit, why, transpile, bump-version, ci, desktop, pack, x. 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

   All 3 checks pass.

   pass
5. P5
   Safe Retries & Mutation Boundaries

   destructive subcommand(s) without `--force` or `--yes`: remove, clean. Irreversible operations must require explicit confirmation so they can't be invoked accidentally.

   Remediation · P5⧉ copy prompt

   Make deno satisfy P5 (Safe Retries & Mutation Boundaries) from the agent-native CLI standard. Address:
   - Destructive subcommands require `--force` or `--yes` (destructive subcommand(s) without `--force` or `--yes`: remove, clean. Irreversible operations must require explicit confirmation so they can't be invoked accidentally.)
   Requirements: https://anc.dev/p5

   fail
6. P6
   Composable, Predictable Command Structure

   pager referenced in --help but no --no-pager escape hatch advertised · 20/48 subcommand(s) follow standard verb names. Non-standard: eval, fmt, lint, cache, check, doc, task, bench, compile, coverage, repl, types, jupyter, outdated, sandbox, link, unlink, approve-scripts, lsp, vendor, bundle, why, transpile, bump-version, ci, desktop, pack, x. MAY-tier — community-standard verbs (get/list/create/update/delete) help agents predict subcommand behavior across CLIs.

   Remediation · P6⧉ copy prompt

   Make deno 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 (20/48 subcommand(s) follow standard verb names. Non-standard: eval, fmt, lint, cache, check, doc, task, bench, compile, coverage, repl, types, jupyter, outdated, sandbox, link, unlink, approve-scripts, lsp, vendor, bundle, why, transpile, bump-version, ci, desktop, pack, x. 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.)
   Requirements: https://anc.dev/p6

   warn
7. P7
   Bounded, High-Signal Responses

   no `--verbose` / `-v` flag advertised. SHOULD-tier — agents debugging failures need a way to escalate diagnostic detail. · 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.

   Remediation · P7⧉ copy prompt

   Make deno satisfy P7 (Bounded, High-Signal Responses) from the agent-native CLI standard. Address:
   - `--verbose` flag for diagnostic escalation (no `--verbose` / `-v` flag advertised. SHOULD-tier — agents debugging failures need a way to escalate diagnostic detail.)
   - `--limit` / `--max-results` flag for list operations (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.)
   - Cursor-based pagination flags for list traversal (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.)
   - `--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