v1.6.0a4

What's Changed

• chore(deps): update dependency vitest to v4.1.7 by @renovate[bot] in #564
• chore(deps): update github actions by @renovate[bot] in #563
• chore(deps): lock file maintenance by @renovate[bot] in #567
• chore(deps): update ghcr.io/astral-sh/uv docker tag to v0.11.16 by @renovate[bot] in #565
• chore(deps): update dependency katex to v0.17.0 by @renovate[bot] in #566
• fix(renderer): drop single-$ inline math to stop false positives in prose by @eous in #568
• fix(output_guard): harden against domain-camouflaged injection (#560) by @eous in #573
• feat(skills): parse and store Anthropic spec paths + uplift columns (#569 PR1) by @eous in #574
• feat(skills): ingest when_to_use / model / effort from SKILL.md (#570) by @eous in #576
• feat(skills): wire disable-model-invocation / user-invocable (#571) by @eous in #577
• feat(skills): wire $ARGUMENTS / $N / $ / ${CLAUDE_*} substitution (#572) by @eous in #578

Full Changelog: v1.6.0a3...v1.6.0a4