Agent skill

Roo Bedrock Custom Arn

by OnlyTerp in OnlyTerp/prompt-cache-skills

Roo Code's Bedrock provider silently disables caching for custom ARNs.

Custom licenceAuto-check passedBackend & APIs

Install Roo Bedrock Custom Arn

skills CLI
$ npx skills add OnlyTerp/prompt-cache-skills --skill roo-bedrock-custom-arn -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install OnlyTerp/prompt-cache-skills roo-bedrock-custom-arn --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/OnlyTerp/prompt-cache-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/roo-bedrock-custom-arn .claude/skills/roo-bedrock-custom-arn && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
roo-bedrock-custom-arn
GitHub stars
114
Token cost
~642 tokens
SKILL.md length
235 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
Custom licence

At a glance

Roo Code's Bedrock provider silently disables caching for custom ARNs.

  • Works in 5 steps: Configure Roo with a custom Claude ARN… → Enable prompt caching in Roo settings. → Capture wire via mitmproxy. → …
  • Tasks that involve Caching
  • SKILL.md covers Target, Symptom, Fix and Verify, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Roo Bedrock Custom Arn is an agent skill from OnlyTerp/prompt-cache-skills. Roo Code's Bedrock provider silently disables caching for custom ARNs. Populate cachableFields to fix.

Its SKILL.md is about 640 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Caching. The repository describes itself as: Drop-in prompt-caching fixes for the LLM agent harness you use. Point your AI coding agent at this repo and it ships the patches.

When your agent uses it

  • Tasks that involve Caching

Example prompts

  • “/roo-bedrock-custom-arn”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Configure Roo with a custom Claude ARN (any ARN not in the
  2. Enable prompt caching in Roo settings.
  3. Capture wire via mitmproxy.
  4. Inspect outbound Bedrock Converse API request body
  5. Inspect response usage

What it can do on your machine

Read from SKILL.md and the folder at commit 5b58ae2. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are diff).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Roo Bedrock Custom Arn loads about 642 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 235 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~31
When it runs · the whole SKILL.md, loaded when a task matches
~642

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 235 words (~642 tokens).

name
roo-bedrock-custom-arn
target_harness
Roo Code
target_repo
RooCodeInc/Roo-Code
target_files
src/api/providers/bedrock.ts
target_commit
main @ v3.54.0
estimated_savings
Enables Bedrock prompt caching for custom ARN setups (currently 0%)

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/roo-bedrock-custom-arn of OnlyTerp/prompt-cache-skills.

Open the folder on GitHubat commit 5b58ae2

Compare with similar skills

Roo Bedrock Custom Arn next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Roo Bedrock Custom Arn compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Roo Bedrock Custom Arn this skillOnlyTerp/prompt-cache-skills114—~642Automated safety check: PassCustom licence
Stripe Projectsfossasia/eventyay1.7k5 repos~2kAutomated safety check: NotesApache-2.0
FoundatioFoundatioFx/Foundatio2.1k—~3.9kAutomated safety check: PassApache-2.0
Wp Block Themesgambitph/Stackable3513 repos~985Automated safety check: PassGPL-3.0
Wp Performancegambitph/Stackable3513 repos~1.5kAutomated safety check: PassGPL-3.0
Effect Portable Patternsmillionco/expect3.6k—~3.7kAutomated safety check: PassCustom licence

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Categories

Questions about Roo Bedrock Custom Arn

What does Roo Bedrock Custom Arn do?

Roo Code's Bedrock provider silently disables caching for custom ARNs. Roo Bedrock Custom Arn is an agent skill from OnlyTerp/prompt-cache-skills. Roo Code's Bedrock provider silently disables caching for custom ARNs.

When should I use Roo Bedrock Custom Arn?

Roo Bedrock Custom Arn fits situations like: tasks that involve Caching.

How do I install Roo Bedrock Custom Arn in Claude Code?

Run `npx skills add OnlyTerp/prompt-cache-skills --skill roo-bedrock-custom-arn -a claude-code`. Or copy the skill folder (skills/roo-bedrock-custom-arn in OnlyTerp/prompt-cache-skills) into .claude/skills/roo-bedrock-custom-arn in your project. Claude Code loads it when a task matches its description.

How do I install Roo Bedrock Custom Arn in Codex?

Run `npx skills add OnlyTerp/prompt-cache-skills --skill roo-bedrock-custom-arn -a codex`. Or copy the skill folder (skills/roo-bedrock-custom-arn in OnlyTerp/prompt-cache-skills) into .agents/skills/roo-bedrock-custom-arn in your project. Codex loads it when a task matches its description.

Can I use Roo Bedrock Custom Arn in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add OnlyTerp/prompt-cache-skills --skill roo-bedrock-custom-arn -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/roo-bedrock-custom-arn, .gemini/skills/roo-bedrock-custom-arn, .github/skills/roo-bedrock-custom-arn and .opencode/skills/roo-bedrock-custom-arn in your project.

What does Roo Bedrock Custom Arn need to run?

SKILL.md names no scripts, command-line tools or credentials: Roo Bedrock Custom Arn is instructions for the agent only.

Does Roo Bedrock Custom Arn access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Roo Bedrock Custom Arn safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Roo Bedrock Custom Arn use?

Roo Bedrock Custom Arn has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Roo Bedrock Custom Arn use?

About 642 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Roo Bedrock Custom Arn?

Skills that share tags, products or a category with Roo Bedrock Custom Arn: Stripe Projects (fossasia/eventyay, 1.7k stars), Foundatio (FoundatioFx/Foundatio, 2.1k stars), Wp Block Themes (gambitph/Stackable, 351 stars) and Wp Performance (gambitph/Stackable, 351 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Roo Bedrock Custom Arn?

OnlyTerp (a GitHub user) maintains it in OnlyTerp/prompt-cache-skills, which has 114 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on August 29, 2026.

Source: OnlyTerp/prompt-cache-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.