Prompt Caching
Cross-provider (Anthropic/OpenAI/Bedrock/Gemini) prompt-caching diagnostic playbook — four of its own linked reference files are missing from the repo.
Test report
- Verdict
- Works with setup
- Score
- Tested
- Jul 14, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Aug 10, 2026 · d051749
Nails the actual diagnostic playbook — demands the real hit-rate number, walks the cache-boundary rule, flags Anthropic's 125%-write/10%-read billing asymmetry — but four reference files it points to (references/anthropic-caching.md, openai-caching.md, gemini-caching.md, cost-math.md) simply aren't in the repo; a user has to source those provider deep-dives themselves. (Listed here under our older name; the skill's own name is "Prompt Caching".)
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 3/5
- Triggers reliably 5/5
- Output vs. baseline 8/10
- Docs & honesty 2/5
What Prompt Caching does
A decision-flow-and-rules skill for diagnosing and fixing prompt-cache misses across Anthropic, OpenAI, Bedrock, and Gemini: when to cache, the 'static above / dynamic below' boundary rule, provider-specific TTL and billing notes, and a hard line that you must measure hit rate before tuning. It fires on cost/latency questions about repeated LLM calls. The SKILL.md itself links out to four deeper reference files (references/anthropic-caching.md, openai-caching.md, gemini-caching.md, cost-math.md) that do not exist anywhere in the repo, so the core guidance works standalone but the promised deep-dives don't.
How to install Prompt Caching
git clone https://github.com/cobusgreyling/agent-skills
cd agent-skills
mkdir -p ~/.claude/skills
cp -r skills/prompt-caching ~/.claude/skills/prompt-cache-optimizer
Skills live in ~/.claude/skills/ (global) or .claude/skills/
(per-project). Restart Claude Code after installing.
Commands — how to trigger Prompt Caching
-
/prompt-cache-optimizerCross-provider (Anthropic/OpenAI/Bedrock/Gemini) prompt-caching diagnostic playbook — four of its own linked reference files are missing from the repo.
It also activates on plain-language prompts like these:
-
Reorder this prompt so the stable prefix caches better -
Improve our cache-hit rate on this agent workload -
Move volatile data to the end of this prompt for caching
Frequently asked questions
- Is the Prompt Caching skill free?
- Yes. The skill itself is free from cobusgreyling/agent-skills. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Prompt Caching work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Works with setup. Nails the actual diagnostic playbook — demands the real hit-rate number, walks the cache-boundary rule, flags Anthropic's 125%-write/10%-read billing asymmetry — but four reference files it points to (references/anthropic-caching.md, openai-caching.md, gemini-caching.md, cost-math.md) simply aren't in the repo; a user has to source those provider deep-dives themselves. (Listed here under our older name; the skill's own name is "Prompt Caching".)
- What is the Prompt Caching SkillProof Score?
- 7.2/10 — installs cleanly 3/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 2/5.
- How do I install Prompt Caching?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Prompt Caching with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.