Add prominent warning block that the Agent tool is not exposed to
sub-agents (foreground or background). Rewrite Shape A (orchestrator
handoff) from "valid pattern" to "confirmed anti-pattern, removed in
v2.4.0". Correct Composition section: background + subagents is
NOT supported — nested spawn from a sub-agent silently fails.
Source: github.com/anthropics/claude-code/issues/19077
Confirmed empirically 2026-04-19.
BREAKING CHANGE: Catalog consumers that cited Shape A should migrate
to orchestrating from the main command context instead.
Resolves v2.3.0 dogfood collision: skill-factory produced a
specialized hooks-pattern.md draft that would have overwritten the
generic seed. Qualified slugs let one feature host multiple named
patterns at different abstraction levels.
Slug convention: <cc_feature>[-<qualifier>]-<layer>.md. Unqualified =
canonical baseline. Qualified = sub-pattern (e.g., hooks-observability-
pattern.md) that does not displace the baseline.
Changes:
- SKILL.md: slug convention section, coverage-table qualified column,
matcher logic for N patterns per feature, modification rules cover
qualified-vs-canonical choice and collision handling.
- feature-matcher: catalog map is cc_feature -> {layer -> [skills]};
selection rules (baseline by default, qualified when justified,
multi-skill when non-overlapping); supporting_skill accepts list.
- gap-identifier: adds pattern_count[cc_feature] to coverage audit.
- architecture-critic: supporting-skill verification — every cited
skill name must exist in the catalog (blocker severity).
- First qualified skill: hooks-observability-pattern.md (promoted from
.drafts/, source ai-psychosis/README.md, ngram-overlap 0.01).
- Version bump 2.3.0 -> 2.3.1 across plugin.json, badges, table, root
CLAUDE.md, CHANGELOG.
Non-breaking: existing unqualified slugs keep working, no cc_feature
taxonomy changes, hallucination gate unchanged.
