# Setup > Verify the typos-format hook's runtime prerequisites and configuration for this repository. Use when: 'set up typos-format', 'configure typos-format', 'is typos-format working', spell-fixing silently isn't happening, or the hook reported a missing prerequisite. Actions: check (read-only verification, default) | apply (resolve what check found). Re-runnable and safe. - Skill: `melodic-software/setup-37` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add melodic-software/setup-37` - Raw SKILL.md: https://api.skillmd.com/api/skills/melodic-software/setup-37/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: melodic-software (https://skillmd.com/u/melodic-software) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/melodic-software/setup-37 --- ## Purpose Thin check-centric setup per the uniform setup contract (`docs/PLUGIN-PHILOSOPHY.md` "Setup is explicit and repeatable" in the marketplace repository): `check` inspects and reports, `apply` resolves. This plugin owns no consumer-project configuration. Rules come from the repository's own typos config, and the only tunables are the native `userConfig` options (the on/off toggle and the write-mode switch). Unlike sibling formatter plugins (Ruff, markdownlint-cli2), typos has no per-repo dependency-manager install path. It is a standalone Rust binary installed at the machine level (cargo, Homebrew, Conda, pacman, or a pre-built binary), never as a project dependency. `apply` is therefore guidance-only: it never installs anything, matching the hook's own PATH-only resolution and the plugin philosophy's never-download-silently rule. Action routing: no argument or `check` runs the check; `apply` runs the check first, then prints remediation guidance for each FAIL. Both are non-interactive. Never prompt when the action is given. ## `check` (read-only) The hook script (`${CLAUDE_PLUGIN_ROOT}/hooks/typos-format.sh`) is the single source of truth for what it requires and how it resolves things. **Read it first.** Probe what it actually does, don't recite this file. Then run each probe via Bash and report a PASS/FAIL/INFO table with one remediation line per FAIL. Do not modify anything. When the plugin's toggle is disabled, every prerequisite absence downgrades from FAIL to INFO. The hook exits through its enabled-gate before probing anything, so a deliberately disabled plugin is not broken. Report the probes informationally and note that re-enabling restores the FAIL semantics. 1. **Bash version.** Check against the hook's documented floor (README Requirements), noting any features the hook degrades without (telemetry's `EPOCHREALTIME`, Bash 5.0+). 2. **`jq`.** `command -v jq`. FAIL if absent: the hook then skips with a visible once-per-session notice instead of running. 3. **typos binary.** `command -v typos` (the hook resolves PATH only, with no `.venv`-style per-repo convention). Report the resolved path and `typos --version` output when found. FAIL when absent; the hook then emits a visible once-per-session skip notice instead of running. 4. **Consumer typos config (informational only).** The hook runs unconditionally and never gates on a config existing; typos resolves its own governing config (if any) directly from the file path it is given. The hook also injects its bundled `config/default-typos.toml` via `typos -c` (SHA `extend-ignore-re`); `extend-*` keys merge with the discovered file rather than replacing it. Report whether a `typos.toml`, `_typos.toml`, `.typos.toml`, a `Cargo.toml` with `[workspace.metadata.typos]`/`[package.metadata.typos]`, or a `pyproject.toml` with `[tool.typos]` governs the repo, purely as INFO. Its presence or absence never changes whether the hook runs. 5. **Hook toggle.** Report the effective `typos_format_enabled` value: `${user_config.typos_format_enabled}` (unexpanded or empty means default `true`). 6. **Write mode.** Report the effective `typos_format_write_changes` value: `${user_config.typos_format_write_changes}` (unexpanded or empty means the shipped default `false`, and only the literal `true` enables writes. Any other value stays report-only). Report-only is therefore what a default installation does: the hook still runs, still reports findings, and never modifies a file. Report that as **INFO, not PASS**. Every prerequisite can pass while the one behavior the consumer came here for was never turned on, and the commonest reason to invoke this skill is that spell-fixing is not happening. Name the remediation in the same line rather than leaving the reader to infer it. 7. **Hook registration.** INFO: confirm the plugin is enabled for this project (`/plugin` → Installed) rather than parsing settings files. ## `apply` (idempotent) Run `check`, then for each FAIL print remediation guidance. Never install anything. There is no `apply install-typos`-style write path (unlike `ruff-format`/`markdown-format`): typos has no clean per-repo dependency-manager story, so the only responsible action is pointing at the official install methods (`https://github.com/crate-ci/typos#install`: cargo, Homebrew, Conda, pacman, or a pre-built binary; pick the platform-appropriate one to surface) and letting the consumer choose how to install it at the machine level. After the consumer installs `typos` themselves, re-run `check` and report its actual result. Never claim resolved without re-verifying. For everything else `apply` only points: - missing `jq` / Bash: platform install instructions from the README Requirements section; this skill never installs system packages. - toggle off: reconfigure through Claude Code's native flow, per the marketplace's plugin-reconfiguration convention (, which owns the verified-version record): interactive `/plugin configure typos-format@` any time, or headless `claude plugin install typos-format@ -s --config typos_format_enabled=true` (repeatable per key) — against an already-installed plugin it prints `already installed` and still writes the value. Do **not** uninstall to reconfigure: that drops this plugin's entire stored `pluginConfigs` entry, resetting every option in the README's Options reference to its manifest default. `-s` defaults to `user`; pass the scope `claude plugin list` reports, and run from that project's directory for a `project`/`local` scope, or the write lands at a scope that does not load. This skill never writes user settings or `pluginConfigs`. Afterwards rerun `check` in a **fresh session** — the rendered `${user_config.*}` is injected at skill load and each hook's `CLAUDE_PLUGIN_OPTION_*` is fixed at session start, so a same-session `check` still reports the OLD value; report the observed effective value, never an unobserved change. - report-only mode (`typos_format_write_changes` unset, or set to anything but `true`): the hook is working as shipped. Writes were never turned on, so this is a configuration answer, not a repair. Say so, then offer the same `/plugin configure typos-format` route (or the headless install rerun above, with `--config typos_format_write_changes=true`), and state what turning it on accepts: last-writer-wins ordering against any sibling hook that rewrites the same file. For the opposite case, writes already on and a few corrections unwanted, the fit is allow-listing those words in the repository's typos config, not switching the whole hook back to report-only. - no typos config: offer to create a minimal `_typos.toml` in the repository root only when explicitly asked. The plugin imposes no rules of its own. Re-running `apply` after everything passes changes nothing and reports "already configured". ## What this skill does NOT do - Run the spell-checker. Editing any file exercises the hook end-to-end. - Write the plugin cache, Claude Code user settings, or `pluginConfigs`. - Install `typos`. Installation is always the consumer's own choice and command, at the machine level, never a project dependency this skill records. - Download or execute tools during `check` or `apply`.