Agent CookbooksPractitioner blog about Claude Code: hooks, subagents, MCP, skills, CLAUDE.md. Every post ships with the JSON, the timings, and the failure modes from real use.https://agentcookbooks.com/en-usClaude Code hook: Haiku 4.5 judges every content edithttps://agentcookbooks.com/blog/claude-code-content-judge-hook/https://agentcookbooks.com/blog/claude-code-content-judge-hook/A PostToolUse hook that sends every content edit to Haiku 4.5 for an editorial-bar verdict. The config, the rubric, and the prompt-caching floor.Thu, 30 Apr 2026 00:00:00 GMTclaude-codehookscookbookClaude Code hook: validate frontmatter on every Edithttps://agentcookbooks.com/blog/claude-code-frontmatter-guard-hook/https://agentcookbooks.com/blog/claude-code-frontmatter-guard-hook/A PostToolUse hook validating blog and skill frontmatter against the same zod shape Astro uses at build. Real config, two live blocks captured.Thu, 30 Apr 2026 00:00:00 GMTclaude-codehookscookbookClaude Code harness setup: 3 skills, 30 minuteshttps://agentcookbooks.com/blog/claude-code-harness-setup-sprint/https://agentcookbooks.com/blog/claude-code-harness-setup-sprint/15 transcripts scanned, 1 permission survivor, 5 misplaced allow rules found, 2 remote agents scheduled: what three harness skills found in 30 minutes.Wed, 29 Apr 2026 00:00:00 GMTclaude-codehooksskill-developmentClaude Code PostToolUse hook: log every skill activationhttps://agentcookbooks.com/blog/claude-code-skill-activation-hook/https://agentcookbooks.com/blog/claude-code-skill-activation-hook/A PostToolUse hook on the Skill tool: appends a stub to receipts-drafts/. The config, the Node script, and the watcher quirk that took a restart.Wed, 29 Apr 2026 00:00:00 GMTclaude-codehookscookbook/copy-editing vs /humanizer: only one made editshttps://agentcookbooks.com/blog/copy-editing-vs-humanizer/https://agentcookbooks.com/blog/copy-editing-vs-humanizer/Two skills on the same 65-line technical post: copy-editing made 4 edits, humanizer made 0. The negative result and the decision rule it produces.Wed, 29 Apr 2026 00:00:00 GMTclaude-codeskillscopywritinghumanizingThree SEO skills on pre-launch Astro: what each caughthttps://agentcookbooks.com/blog/three-seo-skills-pre-launch-audit/https://agentcookbooks.com/blog/three-seo-skills-pre-launch-audit/Three SEO skills, one pre-launch Astro site, no live URL: title fixed in 3 minutes, full-site scored at 82/100, content E-E-A-T at 65/100.Wed, 29 Apr 2026 00:00:00 GMTclaude-codeskillsseoClaude Code hooks: a starter recipe with real confighttps://agentcookbooks.com/blog/claude-code-hooks-cookbook/https://agentcookbooks.com/blog/claude-code-hooks-cookbook/One Claude Code hook, the actual JSON, what it blocks, and the two failure modes I hit. The full cookbook ships after 12 hooks in production.Tue, 28 Apr 2026 00:00:00 GMTclaude-codehookscookbook