Prepare for tinycloud 0.3.15: iconik connector, metadata collections, probe filters, connectors refresh (skill floor → 0.3.15)

[kdr]

Summary

Prepares the distribution surfaces for tinycloud 0.3.15 (built from the private source repo; bundles Cloudglue SDK 0.7.21 / API spec v0.7.11):

• Iconik connector — seventh metadata-bearing provider: iconik://asset/<id> on connectors sync/inspect, --from/--to (asset date_created) + --title-search on connectors files, custom metadata-view fields under source_metadata.iconik_metadata.<Field> (feature library.connectors.iconik.v1).
• Metadata collections — library collections create --type metadata indexes connector source_metadata + user metadata (new collections add --metadata '<json|file.json>') into file-level search docs WITHOUT processing media; free/near-instant, no processing configs; read with probe --scope file/ask (feature library.collections.metadata.v1).
• probe --filter "<path[op]value>" — repeatable/ANDed stored-field filters (ops = != > < ~= *= &= ^=; source_metadata.*/metadata.*/video_info.*/file.* paths). Filters bind inside the deep search itself (AND-merged server-side with the search's own planning), so filtered probes keep ranking + data.summary synthesis (feature probe.filters.v1; the deep-search filter fix this depends on is deployed and live-verified).
• library connectors refresh <source> — re-fetches an existing file's source_metadata from its connector and re-indexes its metadata collections; free (feature library.connectors.refresh.v1).

Changes here

• reference/verbs.md, SKILL.md, reference/glossary.md teach all of the above (with per-feature ids and older-binary fallbacks for refresh).
• Skill floor → 0.3.15: tinycloud-skill.json min_version/supported_range and preflight MIN_VERSION; required_features += probe.filters.v1, library.collections.metadata.v1 (both lists byte-identical; connector features stay out of required, as before — they're account-dependent).
• Package/plugin/marketplace/skill versions → 0.3.15; CLAUDE.md gains the 0.3.15 contract paragraph (features 34→38, verbs stay 16) and maintainer examples move to 0.3.15.

Merge gate

⚠️ Same pattern as the 0.3.12/0.3.14 floor raises: merge only after the CDN's channels.stable is 0.3.15 (source-repo PR: binary release lands first). The live-CDN statement in CLAUDE.md intentionally still says 0.3.14 until then.

Test plan

• npm test 42/42 (offline fixture CDN)
• shellcheck clean; claude plugin validate . passes
• JSON ↔ preflight required-feature lists byte-identical
• smoke-test.sh 16/16 and preflight.sh → ok against a locally built 0.3.15 binary reporting all four new feature ids
• Live battery on the built binary against a real account with an iconik connector: iconik listing/title-search/inspect, metadata-collection lifecycle with user metadata, positive AND negative probe filters, connectors refresh (12 fields), cleanup

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Note

Low Risk
Documentation and version-metadata only in this repo; no installer or launcher logic changes. Main operational risk is merging before CDN stable 0.3.15, which would block agents on preflight until users upgrade.

Overview
Prepares the public distribution repo for tinycloud 0.3.15 (binary ships separately on CDN): package.json, Claude plugin metadata, README install examples, and maintainer docs all move from 0.3.14 → 0.3.15.

Agent skill and reference docs are expanded for SDK 0.3.15 capabilities—Iconik connector URIs and listing filters, library collections create --type metadata with collections add --metadata, repeatable probe --filter on collection scopes, and library connectors refresh—in SKILL.md, reference/verbs.md, and reference/glossary.md. CLAUDE.md adds the 0.3.15 contract note (features 34→38, verbs still 16).

Compatibility gate: tinycloud-skill.json and preflight.sh set min_version / supported_range to ≥0.3.15 and require probe.filters.v1 and library.collections.metadata.v1 (lists kept in sync for CI). Intended merge only after CDN channels.stable is 0.3.15.

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