cli: --kind rejects hyphen/case variants that algorithm names already accept (skill-library, SKILL_LIBRARY) #882

Phenomenon

agentdescent algorithms list --kind skill-library, init --kind SKILL_LIBRARY, and algorithms run … --kind skill-dir fail, even though algorithm names (archive-selection, GEPA) and parameter names (batch-size, NOISE_BAND) already fold case and -/_. Hosts and users following CLI-style hyphens (or shouting a constant) hit a hard reject instead of the card list or a starter spec.

Evidence

On current main (b37fa40c):

• algorithms list --kind skill-library → --kind must be one of ['text', 'skill_dir', 'skill_library', …], got 'skill-library'
• algorithms list --kind SKILL_LIBRARY → same, got 'SKILL_LIBRARY'
• init /tmp/prompt.txt --kind skill-library --json → argparse invalid choice: 'skill-library'
• A spec with "kind": "skill-library" fails compose with kind must be one of …
• Contrast: algorithms show archive-selection and --param batch-size=1 already resolve (algorithms show/run: algorithm names are case- and hyphen-sensitive #696, algorithms: unknown parameter names don't fold hyphens or suggest a near-miss (batch-size / bacth_size → batch_size) #876 / fix(algorithms): fold and suggest near-miss parameter names #877).

skil_library (a near-miss typo) also lists every kind and does not say did you mean 'skill_library'?, unlike unknown algorithm / parameter names (#874, #876).

Expected

A --kind / spec kind that matches exactly one of text, skill_dir, skill_library, agent_dir, agent_code, plugin, policy_slot once case and -/_ are ignored resolves to that name (skill-library → skill_library, SKILL_DIR → skill_dir). Written specs and algorithms list/run/MCP list_algorithms use the canonical name. When the value is still unknown and is a close match (difflib, cutoff 0.75) to exactly one kind, append ; did you mean 'skill_library'?. No guess for unrelated names like nope.

Acceptance

• algorithms list --kind skill-library and --kind SKILL_LIBRARY list the same cards as --kind skill_library
• init --kind skill-library writes "kind": "skill_library" (same tree seeding as the canonical flag)
• algorithms run / MCP algorithm_spec / list_algorithms accept the same aliases
• A spec "kind": "skill-library" composes as skill_library
• skil_library (or --kind skil_library) ends with did you mean 'skill_library'?; nope does not guess
• changelog.d fragment

Non-goals

• New kinds, or teaching text-only cards to accept skill_library (cards: most algorithms are text-only vs skill_library product positioning #846)
• Folding spaces or other punctuation (skill library, skill.library)

Risk hint

T1/T2 (CLI / spec kind validation only; no evolve-loop change).

Related

#874 (algorithm-name near-miss), #876/#877 (parameter-name fold + near-miss), #696 (algorithm-name aliases).