Add Command Skill

Add a new public bashdep:: lifecycle command (sibling of install, uninstall, clean, doctor, list, self_update) following strict TDD.

Prerequisites

1. Task file - create .tasks/YYYY-MM-DD-add-<command>.md
2. Read the existing commands - bashdep is a single file; scan how bashdep::clean, bashdep::doctor, bashdep::uninstall are structured to match style
3. Read the API doc - docs/api.md defines the public contract; the new command's signature must fit the same shape

Workflow

1. Plan

Decide with the user:

• Command name (bashdep::<verb>)
• Arguments (positional vs key=value like bashdep::setup)
• Mutating? If yes, must honor BASHDEP_DRY_RUN, BASHDEP_SILENT, BASHDEP_VERBOSE, BASHDEP_FORCE
• Lockfile interaction (read / write / both / none)
• Exit codes (0 success, 1 validation/IO failure)
• Logging surface (bashdep::_log / bashdep::_vlog)

Document acceptance criteria + test inventory in the task file.

2. Study Existing Patterns

Read the closest sibling command in bashdep and its tests in tests/unit/bashdep_test.sh. Reuse helpers: bashdep::_classify_dep, bashdep::_lock_get, bashdep::_lock_remove, bashdep::is_dry_run.

3. TDD Cycles

For each test in the inventory, follow RED → GREEN → REFACTOR:

1. Happy path - pure-logic test if possible (no filesystem)
2. Filesystem path - use $TEST_DIR + _seed_* helpers
3. Mode coverage - one test each for dry-run, silent, verbose, force if the command is mutating
4. Failure modes - bad arguments, missing lockfile, IO error
5. Snapshot test for any new user-visible output

4. Integration

• Add the public function near the bottom of bashdep (after the existing public commands, before any trailing CLI dispatch)
• Add a CLI dispatch case if bashdep is invoked as an executable for this command
• Run full suite: make test
• Quality gate: make pre_commit/run

5. Documentation

• Add the function to docs/api.md with usage, arguments, return codes, and a worked example
• Update docs/behavior.md if the command introduces new lockfile or filesystem semantics
• Update CHANGELOG.md ## Unreleased under ### Added
• Update the public-API table in .claude/CLAUDE.md
• Update README.md Quick Start if the command is part of the typical workflow

Final Checklist

• All tests passing (happy path, failure modes, mode flags, snapshot)
• Function namespaced bashdep:: and documented in docs/api.md
• Mutating? Modes honored (dry-run / silent / verbose / force)
• Quality gate passes (make pre_commit/run)
• Bash 3.2+ compatible
• CHANGELOG.md updated
• Task file completed