Storage S3 Resiliency Expertise
aws/tools-for-devops-agent
S3 resiliency, security, and data protection review. An agent skill from aws/tools-for-devops-agent.
Agent skill
Implementing Immutable Backup With Restic
Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data…
Install Implementing Immutable Backup With Restic
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-restic --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .claude/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.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/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .claude/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-resticType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-restic --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .agents/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .agents/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-restic --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .cursor/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .cursor/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/implementing-immutable-backup-with-restic--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-restic --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .gemini/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .gemini/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-resticInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .github/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .github/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-immutable-backup-with-restic --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/implementing-immutable-backup-with-restic .opencode/skills/implementing-immutable-backup-with-restic && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "implementing-immutable-backup-with-restic" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/implementing-immutable-backup-with-restic into .opencode/skills/implementing-immutable-backup-with-restic/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "implementing-immutable-backup-with-restic", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
implementing-immutable-backup-with-restic- GitHub stars
- 34k
- Token cost
- ~1k tokens
- SKILL.md length
- 374 words
- Files
- 4 (incl. scripts, references)
- Skills in repo
- 637
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data…
- Works in 4 steps: Initialize Restic Repository with… → Configure Object Lock Retention → Automate Backup and Verification → …
- Building immutable backup infrastructure
- SKILL.md covers When to Use, Prerequisites, Workflow and Key Concepts, plus 2 more sections
- Runs Python scripts from its folder
What it does
Implementing Immutable Backup With Restic is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data, retention enforcement, and restore testing. Use when building immutable backup infrastructure, adding a WORM copy to a 3-2-1-1-0 strategy, or automating scheduled backup-verification workflows.
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/api-reference.md` and `scripts/agent.py`).
It sits in DevOps & Cloud, covering Backup and disaster recovery and File uploads and storage. It works with Amazon S3. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.
When your agent uses it
- Building immutable backup infrastructure
- Adding a WORM copy to a 3-2-1-1-0 strategy
- Automating scheduled backup-verification workflows
Example prompts
- “Use the implementing-immutable-backup-with-restic skill to implement ransomware-resistant backups using restic with S3-compatible Object Lock (AWS…”
- “/implementing-immutable-backup-with-restic”
Requirements
- Python 3
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 54a7988. 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
Ships 1 file in scripts/ (Python), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
restic.readthedocs.io
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
Implementing Immutable Backup With Restic loads about 1k tokens when it runs, and up to ~1.8k if it reads all its reference files. Until then it costs about 106 tokens; SKILL.md has 374 words of instructions outside code blocks.
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); the scripts in this folder are not scanned.
SKILL.md
The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 374 words, ~1,044 tokens.
Download SKILL.mdSave it as
.claude/skills/implementing-immutable-backup-with-restic/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- implementing-immutable-backup-with-restic
- description
- Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data, retention enforcement, and restore testing. Use when building immutable backup infrastructure, adding a WORM copy to a 3-2-1-1-0 strategy, or automating scheduled backup-verification workflows.
- domain
- cybersecurity
- subdomain
- ransomware-defense
- tags
- restic, backup, immutable, ransomware, s3, object-lock, worm, recovery
- version
- 1.0.0
- author
- mahipal
- license
- Apache-2.0
- nist_ai_rmf
- MEASURE-2.7, MAP-5.1, MANAGE-2.4
- atlas_techniques
- AML.T0070, AML.T0066, AML.T0082
- nist_csf
- PR.DS-11, RS.MA-01, RC.RP-01, PR.IR-01
- mitre_attack
- T1078, T1190, T1059, T1486, T1490
Implementing Immutable Backup with Restic
When to Use
- Establishing ransomware-resistant backup infrastructure with cryptographic integrity verification
- Implementing 3-2-1-1-0 backup strategy where the extra 1 is an immutable copy
- Automating backup verification workflows that test restore capability on a schedule
- Protecting backup repositories from deletion or modification by compromised admin accounts
- Meeting compliance requirements for data retention with tamper-proof storage
Do not use as the sole backup solution without also maintaining offline/air-gapped copies. Object lock protects against logical deletion but not physical storage failure.
Prerequisites
- restic binary installed (https://restic.readthedocs.io/)
- S3-compatible storage with Object Lock enabled (AWS S3, MinIO, Backblaze B2)
- Python 3.8+ with subprocess module
- AWS CLI or MinIO client (mc) configured for bucket access
- Sufficient storage for backup repository (typically 2-3x source data with deduplication)
Workflow
Step 1: Initialize Restic Repository with Encryption
Create an encrypted restic repository on S3-compatible storage with object lock enabled. Restic uses AES-256-CTR for encryption with Poly1305-AES for authentication, ensuring backup data is both confidential and tamper-evident.
Step 2: Configure Object Lock Retention
Enable S3 Object Lock in Compliance mode on the backup bucket to prevent any principal (including root) from deleting or modifying objects during the retention period. Set retention to match your backup window requirements (typically 30-90 days).
Step 3: Automate Backup and Verification
Schedule backup operations with post-backup integrity verification using restic check --read-data which downloads and verifies every data blob against its stored checksum. Log results and alert on any integrity failures.
Show full SKILL.md (133 more words)Show less
Step 4: Test Restore Procedures
Periodically restore random files from backup snapshots to a temporary location and compare checksums against the original to validate end-to-end backup integrity. Document restore times for RTO planning.
Key Concepts
| Term | Definition |
|---|---|
| Object Lock | S3 feature that prevents object deletion or overwrite for a specified retention period |
| Compliance Mode | Object Lock mode where even the root account cannot delete objects before retention expires |
| Deduplication | Restic stores data in content-addressable chunks, deduplicating across all snapshots |
| 3-2-1-1-0 | 3 copies, 2 media types, 1 offsite, 1 immutable, 0 errors in verification |
Tools & Systems
- restic: Fast, secure, cross-platform backup tool with built-in encryption and deduplication
- resticpy: Python wrapper for restic CLI operations
- AWS S3 Object Lock: WORM storage for tamper-proof backup retention
- MinIO: Self-hosted S3-compatible storage with Object Lock support
Output Format
BACKUP VERIFICATION REPORT
===========================
Repository: s3:s3.amazonaws.com/company-backups-immutable
Snapshots: 45
Total Size: 2.3 TiB (deduplicated from 8.7 TiB)
Last Backup: 2026-03-11T02:00:00Z
Integrity Check: PASSED (all packs verified)
Object Lock: Compliance mode, 90-day retention
Restore Test: PASSED (15 files verified)© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files (scripts, references) in skills/implementing-immutable-backup-with-restic of mukul975/Anthropic-Cybersecurity-Skills.
- SKILL.md
- LICENSE
- references/api-reference.md
- scripts/agent.py
Open the folder on GitHubat commit 54a7988
Compare with similar skills
Implementing Immutable Backup With Restic 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Implementing Immutable Backup With Restic this skillmukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~1k | Automated safety check: Pass | Apache-2.0 | |
| Storage S3 Resiliency Expertiseaws/tools-for-devops-agent | 100 | — | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| AWS Essentialsericrisco/rsc-harness | 167 | — | ~2.9k | Automated safety check: Notes | MIT | |
| Resticmajiayu000/claude-skill-registry | 666 | 1 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Database Backupssickn33/agentic-awesome-skills | 47k | 2 repos | ~3.1k | Automated safety check: Notes | MIT | |
| Storage Fsx Windows Sla Optimizeraws/tools-for-devops-agent | 100 | — | ~3.4k | Automated safety check: Pass | Apache-2.0 |
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Related
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Questions about Implementing Immutable Backup With Restic
What does Implementing Immutable Backup With Restic do?
Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data…. Implementing Immutable Backup With Restic is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Implements ransomware-resistant backups using restic with S3-compatible Object Lock (AWS S3, MinIO, Backblaze B2), automating backup creation, integrity checks via restic check --read-data, retention enforcement, and restore testing.
When should I use Implementing Immutable Backup With Restic?
Implementing Immutable Backup With Restic fits situations like: building immutable backup infrastructure; adding a WORM copy to a 3-2-1-1-0 strategy; automating scheduled backup-verification workflows.
How do I install Implementing Immutable Backup With Restic in Claude Code?
Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a claude-code`. Or copy the skill folder (skills/implementing-immutable-backup-with-restic in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/implementing-immutable-backup-with-restic in your project. Claude Code loads it when a task matches its description.
How do I install Implementing Immutable Backup With Restic in Codex?
Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a codex`. Or copy the skill folder (skills/implementing-immutable-backup-with-restic in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/implementing-immutable-backup-with-restic in your project. Codex loads it when a task matches its description.
Can I use Implementing Immutable Backup With Restic 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 mukul975/Anthropic-Cybersecurity-Skills --skill implementing-immutable-backup-with-restic -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/implementing-immutable-backup-with-restic, .gemini/skills/implementing-immutable-backup-with-restic, .github/skills/implementing-immutable-backup-with-restic and .opencode/skills/implementing-immutable-backup-with-restic in your project.
What does Implementing Immutable Backup With Restic need to run?
Going by SKILL.md and its folder, Implementing Immutable Backup With Restic needs Python for the scripts in its folder. Our summary lists: Python 3.
Does Implementing Immutable Backup With Restic access the network?
SKILL.md names 1 domain. As links in the text: restic.readthedocs.io. This is read from the text; nothing was executed.
Is Implementing Immutable Backup With Restic 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Implementing Immutable Backup With Restic use?
Implementing Immutable Backup With Restic is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Implementing Immutable Backup With Restic use?
About 1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 759 tokens, read only when the agent opens those files.
What are the alternatives to Implementing Immutable Backup With Restic?
Skills that share tags, products or a category with Implementing Immutable Backup With Restic: Storage S3 Resiliency Expertise (aws/tools-for-devops-agent, 100 stars), AWS Essentials (ericrisco/rsc-harness, 167 stars), Restic (majiayu000/claude-skill-registry, 666 stars) and Database Backups (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Implementing Immutable Backup With Restic?
mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 33,922 GitHub stars. The repository holds 637 skills in this directory. The repository was last updated on August 31, 2026.
Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.