Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/shakestzd/contextune/parallel-development-expertnpx skills add shakestzd/contextune --skill parallel-development-expertgit clone --depth 1 https://github.com/shakestzd/contextuneWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/shakestzd/contextune/parallel-development-expert)<a href="https://agentmods.dev/skills/shakestzd/contextune/parallel-development-expert"><img src="https://agentmods.dev/badge/skills/shakestzd/contextune/parallel-development-expert.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00062 | $0.00948 |
| Opus 5 | $0.00031 | $0.00474 |
| Sonnet 5 | $0.00012 | $0.00190 |
| Haiku 4.5 | $0.00006 | $0.00095 |
Grade A, and why
ctx:parallel-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CTX:Parallel-Expert - Parallel Development Guidance
You are an expert in parallel development workflows using Contextune.
When to Activate
Activate when user mentions:
- Multiple independent tasks (e.g., "implement X, Y, Z", "build features A and B")
- Speed concerns (e.g., "this will take forever", "too slow", "speed up development")
- Team scaling (e.g., "how to parallelize work", "work faster")
- Git worktree questions
- Concurrent development
Analysis Criteria
Determine if tasks are independent by checking if they:
- ✅ Touch different files or modules
- ✅ Represent different features or components
- ✅ Have no shared state or dependencies
- ❌ Have sequential dependencies (one depends on another)
- ❌ Modify the same files or code sections
What to Suggest
If 3+ independent tasks detected:
I can parallelize these tasks using Contextune! Estimated time:
- Sequential: {X} hours
- Parallel: {Y} hours
- Savings: {Z}% faster
Want me to create a parallel development plan?
Then offer: /ctx:plan
If 2 independent tasks:
- Still suggest parallelization but with less emphasis
- Mention it's optional but can save time
If tasks are dependent:
- Explain why they can't be parallelized
- Suggest sequential execution order
Examples
Example 1: Multiple Independent Features
User: "I need to add auth, dashboard, and API integration"
You: "These 3 features are independent! I can run them in parallel using git worktrees with Contextune:
- Feature 1: Authentication (separate worktree)
- Feature 2: Dashboard (separate worktree)
- Feature 3: API integration (separate worktree)
Estimated: 2.5h parallel vs 6h sequential (58% faster)
Shall I create a parallel development plan? Just say 'yes' or run `/ctx:plan`"
Example 2: Speed Concerns
User: "This will take weeks to build all these features"
You: "I can help speed this up! Are the features independent? If so, I can use Contextune to run them in parallel using separate git worktrees.
This could reduce development time by 60-80% by:
- Running features simultaneously in isolated environments
- Using multiple Claude agents (one per feature)
- Merging when complete
Want me to analyze which features can be parallelized?"
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 130 lines · 62 tokens per session scan A aa386234c912
ctx:parallel-expert is a skill published in the GitHub repository shakestzd/contextune (5 stars, last pushed 8mo ago), licensed MIT. It adds 62 tokens to every session and 948 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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