bug: all 9 plugins declare skills: ["./SKILL.md"] (a file); must be a directory — marketplace fails validate

[Kita-Toda]

Every plugin in the marketplace declares "skills": ["./SKILL.md"], pointing at a file. Claude Code expects skills entries to be directories containing a SKILL.md. claude plugin validate fails on all nine plugins and therefore on the marketplace as a whole.

Found while investigating #85, but this is independent of it — #85 affects only requesthunt, this affects all nine.

Reproduce

claude plugin validate <marketplace-root>

Actual

✘ plugins[0] plugin.json → skills[0]: Path is a file; skills entries must be
  directories containing SKILL.md: ./SKILL.md
✘ plugins[1] … through plugins[8] — same error
✘ Validation failed

Per-plugin, e.g. claude plugin validate skills/domain-hunter:

✘ Found 1 error:
  ❯ skills[0]: Path is a file; skills entries must be directories containing SKILL.md: ./SKILL.md

Affected

All nine: requesthunt, domain-hunter, logo-creator, banner-creator, nanobanana, reddit, twitter, producthunt, seo-geo.

Comparison with other marketplaces

Every other marketplace I have installed points skills at a directory:

marketplace	skills entry	type
pbakaus/impeccable	./skills/, ./.claude/skills/	dir
forrestchang/andrej-karpathy-skills	./skills/karpathy-guidelines	dir
paper-design/agent-plugins	./skills	dir
ReScienceLab/opc-skills	./SKILL.md	file

Verified fix

Each plugin root already is a directory containing SKILL.md, so pointing the entry at the directory is a one-token change. I tested both candidates against domain-hunter:

"skills": ["./"]   // ✔ Validation passed

// key omitted entirely — ✔ Validation passed

"skills": ["./"] keeps the declaration explicit and validates cleanly; dropping the key also validates, presumably relying on auto-discovery. Either resolves it across all nine.

Runtime impact — CONFIRMED BLOCKING

Update: confirmed via claude plugin details, no restart needed. All five plugins I installed load zero skills.

$ claude plugin details logo-creator@opc-skills
Component inventory
  Skills (0)

Identical Skills (0) for banner-creator, domain-hunter, seo-geo, and requesthunt.

Control — plugins from marketplaces that declare skills as a directory report their skills normally:

$ claude plugin details andrej-karpathy-skills@karpathy-skills
  Skills (1)  karpathy-guidelines
$ claude plugin details paper-desktop@paper
  Skills (2)  code-to-design, design-to-code

And patching a single installed manifest flips it, which confirms the cause and the fix in one step:

$ claude plugin details domain-hunter@opc-skills        # as shipped
  Skills (0)
# edit cached plugin.json: "skills": ["./SKILL.md"] -> ["./"]
$ claude plugin details domain-hunter@opc-skills        # patched
  Skills (1)  domain-hunter

So this is not cosmetic: every skill in the marketplace installs successfully and then silently exposes nothing. Users get a plugin that appears installed but does nothing, with no error surfaced (claude plugin list is quiet about it — the only listed error was the unrelated #85 one). Changing "./SKILL.md" to "./" in all nine plugin.json files fixes it.

Environment

• marketplace at commit db8eff6
• macOS 15 (Darwin 24.6.0)