Agent skill

Generation Timeline

by bolivian-peru in bolivian-peru/os-moda

NixOS generation-aware debugging and time-travel. An agent skill from bolivian-peru/os-moda.

Apache-2.0Auto-check passedDevelopment

Install Generation Timeline

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a claude-code

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

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline --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/bolivian-peru/os-moda.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/generation-timeline .claude/skills/generation-timeline && 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/

Paste into Claude Code

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .claude/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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

$skill-installer install https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline

Type 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.

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bolivian-peru/os-moda.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/generation-timeline .agents/skills/generation-timeline && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .agents/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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.

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bolivian-peru/os-moda.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/generation-timeline .cursor/skills/generation-timeline && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .cursor/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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

$ gemini skills install https://github.com/bolivian-peru/os-moda.git --path skills/generation-timeline

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bolivian-peru/os-moda.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/generation-timeline .gemini/skills/generation-timeline && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .gemini/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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.

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline

Installs 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).

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/bolivian-peru/os-moda.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/generation-timeline .github/skills/generation-timeline && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .github/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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.

skills CLI

$ npx skills add bolivian-peru/os-moda --skill generation-timeline -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install bolivian-peru/os-moda generation-timeline --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bolivian-peru/os-moda.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/generation-timeline .opencode/skills/generation-timeline && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "generation-timeline" agent skill from https://github.com/bolivian-peru/os-moda/tree/main/skills/generation-timeline into .opencode/skills/generation-timeline/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "generation-timeline", 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: generation-timeline
GitHub stars: 119
Token cost: ~777 tokens
SKILL.md length: 162 words
Files: 1
Skills in repo: 17
Repo updated: Jun 24, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

NixOS generation-aware debugging and time-travel. An agent skill from bolivian-peru/os-moda.

Works in 5 steps: Get the generation timeline → Get the audit ledger for the same period → Correlate with journal errors → …
Tasks that involve Debugging
SKILL.md covers "What changed?" Workflow, "Explain my server" Workflow, "Fork my server" Workflow and Critical Rule
Calls ssh

What it does

Generation Timeline is an agent skill from bolivian-peru/os-moda. NixOS generation-aware debugging and time-travel. Correlate system state changes with application failures. Query "what changed and when."

Its SKILL.md is about 780 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 Development, covering Debugging. The repository describes itself as: An operating system built for AI agents — talk to your NixOS server instead of SSH-ing in. Typed, audited tool access with atomic rollback on every change. Research-grade; run it… The licence is Apache-2.0.

When your agent uses it

Tasks that involve Debugging

Example prompts

“what changed and when.”
“Use the generation-timeline skill to nixo generation-aware debugging and time-travel. An agent skill from bolivian-peru/os-moda”
“/generation-timeline”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Get the generation timeline
Get the audit ledger for the same period
Correlate with journal errors
Check memory for related context
Build the timeline

What it can do on your machine

Read from SKILL.md and the folder at commit b8e418f. 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
Shell commands in SKILL.md call:
- ssh
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use ssh, which can reach the network depending on how they are called.
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

Generation Timeline loads about 777 tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 162 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~40
When it runs · the whole SKILL.md, loaded when a task matches: ~777

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

The full file from bolivian-peru/os-moda at commit b8e418f, republished under its Apache-2.0 licence (© bolivian-peru). 162 words, ~777 tokens.

Download SKILL.mdSave it as .claude/skills/generation-timeline/SKILL.md (or your agent's skills folder).

name: generation-timeline
description: NixOS generation-aware debugging and time-travel. Correlate system state changes with application failures. Query "what changed and when."
tools: shell_exec, event_log, journal_logs, memory_recall, memory_store
activation: auto

Generation Timeline — Time-Travel Debugging

Correlate NixOS generations + audit ledger + journal logs to debug issues across time.

"What changed?" Workflow

When a user reports "something broke":

1. Get the generation timeline

shell_exec({ command: "nixos-rebuild list-generations 2>/dev/null | tail -10" })

2. Get the audit ledger for the same period

event_log({ limit: 30 })

3. Correlate with journal errors

journal_logs({ priority: "err", since: "24 hours ago", lines: 50 })

memory_recall({ query: "config change rebuild generation", timeframe: "7d" })

5. Build the timeline

Present a unified view:

Timeline — Last 48 Hours:

Feb 19 09:30  Gen 48 applied (nixpkgs update: OpenSSL 3.1→3.2)
Feb 19 09:47  ERROR: app returned first 502 (17 min after gen 48)
Feb 19 09:48  WARNING: 12 more 502s in next minute
Feb 19 09:52  agentd detected service degradation (audit #134)
Feb 19 10:00  You: "something broke"

Root cause: Gen 48 updated OpenSSL, breaking TLS cipher
used by your app.

Options:
(a) Rollback to Gen 47 (reverts everything since)
(b) Pin OpenSSL 3.1 for your app only (overlay)
(c) Update app TLS config (best long-term fix)

"Explain my server" Workflow

When asked "what does this server do" or "explain the setup":

shell_exec({ command: "cat /etc/nixos/configuration.nix" })
shell_exec({ command: "nixos-rebuild list-generations | head -5" })
shell_exec({ command: "systemctl list-units --type=service --state=running --no-pager" })

Generate a plain-English overview:

Your Server — osModa (Hetzner CX22)

Services running:
  - agentd (osModa system daemon) — since boot
  - OpenClaw Gateway (AI agent interface) — port 18789
  - SSH (key-auth only) — port 22
  - nginx (reverse proxy) — ports 80, 443

Architecture:
  Internet → nginx (443) → OpenClaw (18789)
  SSH → direct access (22)

NixOS: Generation 50, built Feb 20
Resources: 2 CPU, 7.6GB RAM, 80GB disk (38% used)
Uptime: 12 hours

History: 50 generations over 18 days.
Key changes stored in audit ledger (134 entries).

"Fork my server" Workflow

When asked to create a staging copy or export the config:

shell_exec({ command: "cat /etc/nixos/configuration.nix" })
shell_exec({ command: "cat /etc/nixos/hardware-configuration.nix" })

Generate a self-contained flake that reproduces this machine:

Include all service configs
EXCLUDE secrets, API keys, database contents
Include a README explaining how to deploy

Critical Rule

The audit ledger is the source of truth for "why" something was done. NixOS generations are the source of truth for "what" the system state is. Journal logs are the source of truth for "when" things happened.

Always correlate all three when debugging.

Files

Just SKILL.md in skills/generation-timeline of bolivian-peru/os-moda.

Open the folder on GitHubat commit b8e418f

Compare with similar skills

Generation Timeline 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.

Generation Timeline compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Generation Timeline this skillbolivian-peru/os-moda	119	—	~777	Automated safety check: Pass	Apache-2.0	3 mo ago
Trellis Session Insightmindfold-ai/Trellis	15k	4 repos	~1.7k	Automated safety check: Pass	AGPL-3.0	11 days ago
Native Data FetchingCherryHQ/cherry-studio-app	4k	6 repos	~2.9k	Automated safety check: Notes	MIT	today
Debugging Executionsn8n-io/n8n	207k	—	~2.6k	Automated safety check: Pass	Custom licence	today
Aoti Debugpytorch/pytorch	104k	1 repos	~1.7k	Automated safety check: Pass	Custom licence	today
Herdr Throwaway Reproductionherdrdev/herdr	43k	—	~2.4k	Automated safety check: Pass	Apache-2.0	2 days ago

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15k GitHub starsUsed in 4 repos~1.7k tokens
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A skill your agent uses when implementing or debugging ANY network request, API call, or data fetching.
4k GitHub starsUsed in 6 repos~2.9k tokens
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Questions about Generation Timeline

What does Generation Timeline do?

NixOS generation-aware debugging and time-travel. An agent skill from bolivian-peru/os-moda. Generation Timeline is an agent skill from bolivian-peru/os-moda. NixOS generation-aware debugging and time-travel.

When should I use Generation Timeline?

Generation Timeline fits situations like: tasks that involve Debugging.

How do I install Generation Timeline in Claude Code?

Run `npx skills add bolivian-peru/os-moda --skill generation-timeline -a claude-code`. Or copy the skill folder (skills/generation-timeline in bolivian-peru/os-moda) into .claude/skills/generation-timeline in your project. Claude Code loads it when a task matches its description.

How do I install Generation Timeline in Codex?

Run `npx skills add bolivian-peru/os-moda --skill generation-timeline -a codex`. Or copy the skill folder (skills/generation-timeline in bolivian-peru/os-moda) into .agents/skills/generation-timeline in your project. Codex loads it when a task matches its description.

Can I use Generation Timeline 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 bolivian-peru/os-moda --skill generation-timeline -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/generation-timeline, .gemini/skills/generation-timeline, .github/skills/generation-timeline and .opencode/skills/generation-timeline in your project.

What does Generation Timeline need to run?

Going by SKILL.md and its folder, Generation Timeline needs the command-line tools its instructions call (ssh).

Does Generation Timeline access the network?

SKILL.md contains no URLs. Its commands use ssh, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Generation Timeline 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 Generation Timeline use?

Generation Timeline is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Generation Timeline use?

About 777 tokens (SKILL.md is roughly 3.1k 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 Generation Timeline?

Skills that share tags, products or a category with Generation Timeline: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Debugging Executions (n8n-io/n8n, 207k stars) and Aoti Debug (pytorch/pytorch, 104k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Generation Timeline?

bolivian-peru (a GitHub user) maintains it in bolivian-peru/os-moda, which has 119 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on June 24, 2026.

Source: bolivian-peru/os-moda on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Generation Timeline

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Generation Timeline — Time-Travel Debugging

"What changed?" Workflow

1. Get the generation timeline

2. Get the audit ledger for the same period

3. Correlate with journal errors

4. Check memory for related context

5. Build the timeline

"Explain my server" Workflow

"Fork my server" Workflow

Critical Rule

Files

Compare with similar skills

Similar skills

More from bolivian-peru/os-moda

Related

Questions about Generation Timeline