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Agent skill

Offline Sync

by makifbaysal in makifbaysal/tasktrooper

A skill your agent uses when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and…

Apache-2.0Auto-check passed

Install Offline Sync

skills CLI
$ npx skills add makifbaysal/tasktrooper --skill offline-sync -a claude-code

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

GitHub CLI
$ gh skill install makifbaysal/tasktrooper offline-sync --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/makifbaysal/tasktrooper.git skills-src && mkdir -p .claude/skills && cp -r skills-src/catalog/agents/mobile-developer/skills/offline-sync .claude/skills/offline-sync && 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
offline-sync
GitHub stars
109
Token cost
~868 tokens
SKILL.md length
472 words
Files
1
Skills in repo
99
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and…

  • A screen must work without network
  • SKILL.md covers Overview, Local store, Outbox pattern and Background replay, plus 6 more sections
  • Calls adb
  • A mutation must survive a lost connection - local storage choice

What it does

Offline Sync is an agent skill from makifbaysal/tasktrooper. Use when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and how to test it with a fake clock and fake network.

Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Local-first agent platform: board + role agents + agent CLI runs (Claude Code, Cursor, Antigravity, OpenCode) or local and API models (Ollama, LM Studio), all on your own Mac. The licence is Apache-2.0.

When your agent uses it

  • A screen must work without network
  • A mutation must survive a lost connection - local storage choice
  • The outbox pattern with idempotency keys
  • Background replay

Example prompts

  • “/offline-sync”

What it can do on your machine

Read from SKILL.md and the folder at commit 09f6258. 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:

    • adb

    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

Offline Sync loads about 868 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 472 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~60
When it runs · the whole SKILL.md, loaded when a task matches
~868

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 makifbaysal/tasktrooper at commit 09f6258, republished under its Apache-2.0 licence (© makifbaysal). 472 words, ~868 tokens.

Download SKILL.mdSave it as .claude/skills/offline-sync/SKILL.md (or your agent's skills folder).
name
offline-sync
description
Use when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and how to test it with a fake clock and fake network.
category
mobile

Offline and Sync

Overview

Treat "offline" as a normal state, not an error condition: a screen that only works with a live connection is a defect on mobile. The hard part isn't detecting offline — it's making a queued mutation replay exactly once and keeping the UI honest about what's actually saved.

Local store

Follow the repo's existing choice (drift/sqflite for Flutter, Room for Android, SwiftData/Core Data for iOS) — don't introduce a second local-storage mechanism alongside one that's already there.

Outbox pattern

  • Queue mutations in a local outbox table when offline; replay on reconnect.
  • Every queued mutation carries a client-generated idempotency key, sent with the eventual request, so a retried replay (after a crash mid-sync, or a flaky connection that "succeeded" without the ack arriving) is deduplicated server-side instead of double-applied.
  • Connectivity plugins (connectivity_plus and equivalents) report the state of the network interface, not whether the server is actually reachable — treat the server's response as the source of truth for whether a request succeeded, not the interface state alone.

Background replay

  • Android: WorkManager (native) or the workmanager plugin (Flutter) for replay that must survive the app being backgrounded or killed.
  • iOS: BGTaskScheduler for background replay — register and schedule it, and test on-device since the simulator's background scheduling is unreliable.

UI honesty

Show sync status explicitly per item — pending / syncing / failed — never render an unsynced change as if it were already saved. A spinner that never resolves is worse than an honest "failed, tap to retry."

Conflicts

Pick one conflict rule per data type (last-write-wins, or an explicit user choice when both sides changed) and write it down in the task — don't leave it implicit in the code for the next person to infer.

Show full SKILL.md (190 more words)Show less

Reads degrade gracefully

Cached data with a staleness indicator beats a spinner that never resolves — show what you have, mark it as possibly stale, and update when the network returns.

Testing

  • Unit tests: a fake clock and a fake network/repository to drive queue → replay → ack deterministically, including the "replay happens twice" case to prove the idempotency key actually dedupes.
  • On a local emulator: adb shell cmd connectivity airplane-mode enable / disable to exercise a real reconnect, not just a mocked one.

Common Mistakes

  • A screen that shows a blank/error state the instant the network drops, instead of cached data.
  • A queued mutation with no idempotency key — a retried replay double-applies it.
  • Trusting the connectivity plugin's "online" state as proof a request will succeed.
  • A sync-status UI that doesn't distinguish pending from failed.
  • Only testing airplane-mode-on; never testing the reconnect/replay path.

Red Flags

  • A mutation sent to the server with no client-generated key the server can dedupe on.
  • "It works offline" verified only by reading the code, not by actually toggling airplane mode or a fake network.
  • No written conflict rule for a data type that can be edited from two places.

© makifbaysal, 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

Just SKILL.md in catalog/agents/mobile-developer/skills/offline-sync of makifbaysal/tasktrooper.

Open the folder on GitHubat commit 09f6258

Compare with similar skills

Offline Sync 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.

Offline Sync compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Offline Sync this skillmakifbaysal/tasktrooper109—~868Automated safety check: PassApache-2.0
React Syncvercel/next.js143k—~486Automated safety check: PassMIT
Claude-Mem Cloud Syncthedotmack/claude-mem98k1 repos~1kAutomated safety check: NotesApache-2.0
Agent Sync Coordinatorruvnet/ruflo74k2 repos~4kAutomated safety check: PassMIT
Fix SyncClickHouse/ClickHouse50k—~2.8kAutomated safety check: PassApache-2.0
Frontend Query Mutationlangflow-ai/langflow156k—~979Automated safety check: PassMIT

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  • Analiz Gate

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Questions about Offline Sync

What does Offline Sync do?

A skill your agent uses when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and…. Offline Sync is an agent skill from makifbaysal/tasktrooper. Use when a screen must work without network or a mutation must survive a lost connection - local storage choice, the outbox pattern with idempotency keys, background replay, and how to test it with a fake clock and fake network.

When should I use Offline Sync?

Offline Sync fits situations like: A screen must work without network; A mutation must survive a lost connection - local storage choice; the outbox pattern with idempotency keys; background replay.

How do I install Offline Sync in Claude Code?

Run `npx skills add makifbaysal/tasktrooper --skill offline-sync -a claude-code`. Or copy the skill folder (catalog/agents/mobile-developer/skills/offline-sync in makifbaysal/tasktrooper) into .claude/skills/offline-sync in your project. Claude Code loads it when a task matches its description.

How do I install Offline Sync in Codex?

Run `npx skills add makifbaysal/tasktrooper --skill offline-sync -a codex`. Or copy the skill folder (catalog/agents/mobile-developer/skills/offline-sync in makifbaysal/tasktrooper) into .agents/skills/offline-sync in your project. Codex loads it when a task matches its description.

Can I use Offline Sync 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 makifbaysal/tasktrooper --skill offline-sync -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/offline-sync, .gemini/skills/offline-sync, .github/skills/offline-sync and .opencode/skills/offline-sync in your project.

What does Offline Sync need to run?

Going by SKILL.md and its folder, Offline Sync needs the command-line tools its instructions call (adb).

Does Offline Sync 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 Offline Sync 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 Offline Sync use?

Offline Sync 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 Offline Sync use?

About 868 tokens (SKILL.md is roughly 3.5k 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 Offline Sync?

Skills that share tags, products or a category with Offline Sync: React Sync (vercel/next.js, 143k stars), Claude-Mem Cloud Sync (thedotmack/claude-mem, 98k stars), Agent Sync Coordinator (ruvnet/ruflo, 74k stars) and Fix Sync (ClickHouse/ClickHouse, 50k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Offline Sync?

makifbaysal (a GitHub user) maintains it in makifbaysal/tasktrooper, which has 109 GitHub stars. The repository holds 99 skills in this directory. The repository was last updated on October 7, 2026.

Source: makifbaysal/tasktrooper on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.